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ffmpeg / libavcodec / h264.c @ 1790a5e9

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1
/*
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 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
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 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
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/**
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 * @file libavcodec/h264.c
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 * H.264 / AVC / MPEG4 part10 codec.
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 * @author Michael Niedermayer <michaelni@gmx.at>
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 */
27

    
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#include "dsputil.h"
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#include "avcodec.h"
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#include "mpegvideo.h"
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#include "h264.h"
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#include "h264data.h"
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#include "h264_parser.h"
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#include "golomb.h"
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#include "mathops.h"
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#include "rectangle.h"
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#include "vdpau_internal.h"
38

    
39
#include "cabac.h"
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#if ARCH_X86
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#include "x86/h264_i386.h"
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#endif
43

    
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//#undef NDEBUG
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#include <assert.h>
46

    
47
/**
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 * Value of Picture.reference when Picture is not a reference picture, but
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 * is held for delayed output.
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 */
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#define DELAYED_PIC_REF 4
52

    
53
static VLC coeff_token_vlc[4];
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static VLC_TYPE coeff_token_vlc_tables[520+332+280+256][2];
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static const int coeff_token_vlc_tables_size[4]={520,332,280,256};
56

    
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static VLC chroma_dc_coeff_token_vlc;
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static VLC_TYPE chroma_dc_coeff_token_vlc_table[256][2];
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static const int chroma_dc_coeff_token_vlc_table_size = 256;
60

    
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static VLC total_zeros_vlc[15];
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static VLC_TYPE total_zeros_vlc_tables[15][512][2];
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static const int total_zeros_vlc_tables_size = 512;
64

    
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static VLC chroma_dc_total_zeros_vlc[3];
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static VLC_TYPE chroma_dc_total_zeros_vlc_tables[3][8][2];
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static const int chroma_dc_total_zeros_vlc_tables_size = 8;
68

    
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static VLC run_vlc[6];
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static VLC_TYPE run_vlc_tables[6][8][2];
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static const int run_vlc_tables_size = 8;
72

    
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static VLC run7_vlc;
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static VLC_TYPE run7_vlc_table[96][2];
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static const int run7_vlc_table_size = 96;
76

    
77
static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp);
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static void svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc);
79
static void filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
80
static void filter_mb_fast( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
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static Picture * remove_long(H264Context *h, int i, int ref_mask);
82

    
83
static av_always_inline uint32_t pack16to32(int a, int b){
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#ifdef WORDS_BIGENDIAN
85
   return (b&0xFFFF) + (a<<16);
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#else
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   return (a&0xFFFF) + (b<<16);
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#endif
89
}
90

    
91
static const uint8_t rem6[52]={
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0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
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};
94

    
95
static const uint8_t div6[52]={
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0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
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};
98

    
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static const uint8_t left_block_options[4][8]={
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    {0,1,2,3,7,10,8,11},
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    {2,2,3,3,8,11,8,11},
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    {0,0,1,1,7,10,7,10},
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    {0,2,0,2,7,10,7,10}
104
};
105

    
106
#define LEVEL_TAB_BITS 8
107
static int8_t cavlc_level_tab[7][1<<LEVEL_TAB_BITS][2];
108

    
109
static void fill_caches(H264Context *h, int mb_type, int for_deblock){
110
    MpegEncContext * const s = &h->s;
111
    const int mb_xy= h->mb_xy;
112
    int topleft_xy, top_xy, topright_xy, left_xy[2];
113
    int topleft_type, top_type, topright_type, left_type[2];
114
    const uint8_t * left_block;
115
    int topleft_partition= -1;
116
    int i;
117

    
118
    top_xy     = mb_xy  - (s->mb_stride << FIELD_PICTURE);
119

    
120
    //FIXME deblocking could skip the intra and nnz parts.
121
    if(for_deblock && (h->slice_num == 1 || h->slice_table[mb_xy] == h->slice_table[top_xy]) && !FRAME_MBAFF)
122
        return;
123

    
124
    /* Wow, what a mess, why didn't they simplify the interlacing & intra
125
     * stuff, I can't imagine that these complex rules are worth it. */
126

    
127
    topleft_xy = top_xy - 1;
128
    topright_xy= top_xy + 1;
129
    left_xy[1] = left_xy[0] = mb_xy-1;
130
    left_block = left_block_options[0];
131
    if(FRAME_MBAFF){
132
        const int pair_xy          = s->mb_x     + (s->mb_y & ~1)*s->mb_stride;
133
        const int top_pair_xy      = pair_xy     - s->mb_stride;
134
        const int topleft_pair_xy  = top_pair_xy - 1;
135
        const int topright_pair_xy = top_pair_xy + 1;
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        const int topleft_mb_field_flag  = IS_INTERLACED(s->current_picture.mb_type[topleft_pair_xy]);
137
        const int top_mb_field_flag      = IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
138
        const int topright_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[topright_pair_xy]);
139
        const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
140
        const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
141
        const int bottom = (s->mb_y & 1);
142
        tprintf(s->avctx, "fill_caches: curr_mb_field_flag:%d, left_mb_field_flag:%d, topleft_mb_field_flag:%d, top_mb_field_flag:%d, topright_mb_field_flag:%d\n", curr_mb_field_flag, left_mb_field_flag, topleft_mb_field_flag, top_mb_field_flag, topright_mb_field_flag);
143

    
144
        if (curr_mb_field_flag && (bottom || top_mb_field_flag)){
145
            top_xy -= s->mb_stride;
146
        }
147
        if (curr_mb_field_flag && (bottom || topleft_mb_field_flag)){
148
            topleft_xy -= s->mb_stride;
149
        } else if(bottom && !curr_mb_field_flag && left_mb_field_flag) {
150
            topleft_xy += s->mb_stride;
151
            // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
152
            topleft_partition = 0;
153
        }
154
        if (curr_mb_field_flag && (bottom || topright_mb_field_flag)){
155
            topright_xy -= s->mb_stride;
156
        }
157
        if (left_mb_field_flag != curr_mb_field_flag) {
158
            left_xy[1] = left_xy[0] = pair_xy - 1;
159
            if (curr_mb_field_flag) {
160
                left_xy[1] += s->mb_stride;
161
                left_block = left_block_options[3];
162
            } else {
163
                left_block= left_block_options[2 - bottom];
164
            }
165
        }
166
    }
167

    
168
    h->top_mb_xy = top_xy;
169
    h->left_mb_xy[0] = left_xy[0];
170
    h->left_mb_xy[1] = left_xy[1];
171
    if(for_deblock){
172
        topleft_type = 0;
173
        topright_type = 0;
174
        top_type     = h->slice_table[top_xy     ] < 0xFFFF ? s->current_picture.mb_type[top_xy]     : 0;
175
        left_type[0] = h->slice_table[left_xy[0] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[0]] : 0;
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        left_type[1] = h->slice_table[left_xy[1] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[1]] : 0;
177

    
178
        if(MB_MBAFF && !IS_INTRA(mb_type)){
179
            int list;
180
            for(list=0; list<h->list_count; list++){
181
                //These values where changed for ease of performing MC, we need to change them back
182
                //FIXME maybe we can make MC and loop filter use the same values or prevent
183
                //the MC code from changing ref_cache and rather use a temporary array.
184
                if(USES_LIST(mb_type,list)){
185
                    int8_t *ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
186
                    *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
187
                    *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
188
                    ref += h->b8_stride;
189
                    *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
190
                    *(uint32_t*)&h->ref_cache[list][scan8[10]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
191
                }
192
            }
193
        }
194
    }else{
195
        topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
196
        top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
197
        topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
198
        left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
199
        left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
200

    
201
    if(IS_INTRA(mb_type)){
202
        int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
203
        h->topleft_samples_available=
204
        h->top_samples_available=
205
        h->left_samples_available= 0xFFFF;
206
        h->topright_samples_available= 0xEEEA;
207

    
208
        if(!(top_type & type_mask)){
209
            h->topleft_samples_available= 0xB3FF;
210
            h->top_samples_available= 0x33FF;
211
            h->topright_samples_available= 0x26EA;
212
        }
213
        if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
214
            if(IS_INTERLACED(mb_type)){
215
                if(!(left_type[0] & type_mask)){
216
                    h->topleft_samples_available&= 0xDFFF;
217
                    h->left_samples_available&= 0x5FFF;
218
                }
219
                if(!(left_type[1] & type_mask)){
220
                    h->topleft_samples_available&= 0xFF5F;
221
                    h->left_samples_available&= 0xFF5F;
222
                }
223
            }else{
224
                int left_typei = h->slice_table[left_xy[0] + s->mb_stride ] == h->slice_num
225
                                ? s->current_picture.mb_type[left_xy[0] + s->mb_stride] : 0;
226
                assert(left_xy[0] == left_xy[1]);
227
                if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
228
                    h->topleft_samples_available&= 0xDF5F;
229
                    h->left_samples_available&= 0x5F5F;
230
                }
231
            }
232
        }else{
233
            if(!(left_type[0] & type_mask)){
234
                h->topleft_samples_available&= 0xDF5F;
235
                h->left_samples_available&= 0x5F5F;
236
            }
237
        }
238

    
239
        if(!(topleft_type & type_mask))
240
            h->topleft_samples_available&= 0x7FFF;
241

    
242
        if(!(topright_type & type_mask))
243
            h->topright_samples_available&= 0xFBFF;
244

    
245
        if(IS_INTRA4x4(mb_type)){
246
            if(IS_INTRA4x4(top_type)){
247
                h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
248
                h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
249
                h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
250
                h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
251
            }else{
252
                int pred;
253
                if(!(top_type & type_mask))
254
                    pred= -1;
255
                else{
256
                    pred= 2;
257
                }
258
                h->intra4x4_pred_mode_cache[4+8*0]=
259
                h->intra4x4_pred_mode_cache[5+8*0]=
260
                h->intra4x4_pred_mode_cache[6+8*0]=
261
                h->intra4x4_pred_mode_cache[7+8*0]= pred;
262
            }
263
            for(i=0; i<2; i++){
264
                if(IS_INTRA4x4(left_type[i])){
265
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
266
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
267
                }else{
268
                    int pred;
269
                    if(!(left_type[i] & type_mask))
270
                        pred= -1;
271
                    else{
272
                        pred= 2;
273
                    }
274
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
275
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
276
                }
277
            }
278
        }
279
    }
280
    }
281

    
282

    
283
/*
284
0 . T T. T T T T
285
1 L . .L . . . .
286
2 L . .L . . . .
287
3 . T TL . . . .
288
4 L . .L . . . .
289
5 L . .. . . . .
290
*/
291
//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
292
    if(top_type){
293
        h->non_zero_count_cache[4+8*0]= h->non_zero_count[top_xy][4];
294
        h->non_zero_count_cache[5+8*0]= h->non_zero_count[top_xy][5];
295
        h->non_zero_count_cache[6+8*0]= h->non_zero_count[top_xy][6];
296
        h->non_zero_count_cache[7+8*0]= h->non_zero_count[top_xy][3];
297

    
298
        h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][9];
299
        h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][8];
300

    
301
        h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][12];
302
        h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][11];
303

    
304
    }else{
305
        h->non_zero_count_cache[4+8*0]=
306
        h->non_zero_count_cache[5+8*0]=
307
        h->non_zero_count_cache[6+8*0]=
308
        h->non_zero_count_cache[7+8*0]=
309

    
310
        h->non_zero_count_cache[1+8*0]=
311
        h->non_zero_count_cache[2+8*0]=
312

    
313
        h->non_zero_count_cache[1+8*3]=
314
        h->non_zero_count_cache[2+8*3]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
315

    
316
    }
317

    
318
    for (i=0; i<2; i++) {
319
        if(left_type[i]){
320
            h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[0+2*i]];
321
            h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[1+2*i]];
322
            h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[4+2*i]];
323
            h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[5+2*i]];
324
        }else{
325
            h->non_zero_count_cache[3+8*1 + 2*8*i]=
326
            h->non_zero_count_cache[3+8*2 + 2*8*i]=
327
            h->non_zero_count_cache[0+8*1 +   8*i]=
328
            h->non_zero_count_cache[0+8*4 +   8*i]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
329
        }
330
    }
331

    
332
    if( h->pps.cabac ) {
333
        // top_cbp
334
        if(top_type) {
335
            h->top_cbp = h->cbp_table[top_xy];
336
        } else if(IS_INTRA(mb_type)) {
337
            h->top_cbp = 0x1C0;
338
        } else {
339
            h->top_cbp = 0;
340
        }
341
        // left_cbp
342
        if (left_type[0]) {
343
            h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
344
        } else if(IS_INTRA(mb_type)) {
345
            h->left_cbp = 0x1C0;
346
        } else {
347
            h->left_cbp = 0;
348
        }
349
        if (left_type[0]) {
350
            h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
351
        }
352
        if (left_type[1]) {
353
            h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
354
        }
355
    }
356

    
357
#if 1
358
    if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
359
        int list;
360
        for(list=0; list<h->list_count; list++){
361
            if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type) && !h->deblocking_filter){
362
                /*if(!h->mv_cache_clean[list]){
363
                    memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
364
                    memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
365
                    h->mv_cache_clean[list]= 1;
366
                }*/
367
                continue;
368
            }
369
            h->mv_cache_clean[list]= 0;
370

    
371
            if(USES_LIST(top_type, list)){
372
                const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
373
                const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
374
                *(uint32_t*)h->mv_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0];
375
                *(uint32_t*)h->mv_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1];
376
                *(uint32_t*)h->mv_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2];
377
                *(uint32_t*)h->mv_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3];
378
                h->ref_cache[list][scan8[0] + 0 - 1*8]=
379
                h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
380
                h->ref_cache[list][scan8[0] + 2 - 1*8]=
381
                h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
382
            }else{
383
                *(uint32_t*)h->mv_cache [list][scan8[0] + 0 - 1*8]=
384
                *(uint32_t*)h->mv_cache [list][scan8[0] + 1 - 1*8]=
385
                *(uint32_t*)h->mv_cache [list][scan8[0] + 2 - 1*8]=
386
                *(uint32_t*)h->mv_cache [list][scan8[0] + 3 - 1*8]= 0;
387
                *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
388
            }
389

    
390
            for(i=0; i<2; i++){
391
                int cache_idx = scan8[0] - 1 + i*2*8;
392
                if(USES_LIST(left_type[i], list)){
393
                    const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
394
                    const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
395
                    *(uint32_t*)h->mv_cache[list][cache_idx  ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[0+i*2]];
396
                    *(uint32_t*)h->mv_cache[list][cache_idx+8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[1+i*2]];
397
                    h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
398
                    h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
399
                }else{
400
                    *(uint32_t*)h->mv_cache [list][cache_idx  ]=
401
                    *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
402
                    h->ref_cache[list][cache_idx  ]=
403
                    h->ref_cache[list][cache_idx+8]= left_type[i] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
404
                }
405
            }
406

    
407
            if(for_deblock || ((IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred) && !FRAME_MBAFF))
408
                continue;
409

    
410
            if(USES_LIST(topleft_type, list)){
411
                const int b_xy = h->mb2b_xy[topleft_xy] + 3 + h->b_stride + (topleft_partition & 2*h->b_stride);
412
                const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + (topleft_partition & h->b8_stride);
413
                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
414
                h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
415
            }else{
416
                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
417
                h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
418
            }
419

    
420
            if(USES_LIST(topright_type, list)){
421
                const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
422
                const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
423
                *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
424
                h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
425
            }else{
426
                *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
427
                h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
428
            }
429

    
430
            if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
431
                continue;
432

    
433
            h->ref_cache[list][scan8[5 ]+1] =
434
            h->ref_cache[list][scan8[7 ]+1] =
435
            h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
436
            h->ref_cache[list][scan8[4 ]] =
437
            h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
438
            *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
439
            *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
440
            *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
441
            *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
442
            *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
443

    
444
            if( h->pps.cabac ) {
445
                /* XXX beurk, Load mvd */
446
                if(USES_LIST(top_type, list)){
447
                    const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
448
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 0];
449
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 1];
450
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 2];
451
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 3];
452
                }else{
453
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 0 - 1*8]=
454
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 1 - 1*8]=
455
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 2 - 1*8]=
456
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 3 - 1*8]= 0;
457
                }
458
                if(USES_LIST(left_type[0], list)){
459
                    const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
460
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 0*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[0]];
461
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[1]];
462
                }else{
463
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
464
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
465
                }
466
                if(USES_LIST(left_type[1], list)){
467
                    const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
468
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 2*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[2]];
469
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 3*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[3]];
470
                }else{
471
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
472
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
473
                }
474
                *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
475
                *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
476
                *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
477
                *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
478
                *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
479

    
480
                if(h->slice_type_nos == FF_B_TYPE){
481
                    fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);
482

    
483
                    if(IS_DIRECT(top_type)){
484
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
485
                    }else if(IS_8X8(top_type)){
486
                        int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
487
                        h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
488
                        h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
489
                    }else{
490
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
491
                    }
492

    
493
                    if(IS_DIRECT(left_type[0]))
494
                        h->direct_cache[scan8[0] - 1 + 0*8]= 1;
495
                    else if(IS_8X8(left_type[0]))
496
                        h->direct_cache[scan8[0] - 1 + 0*8]= h->direct_table[h->mb2b8_xy[left_xy[0]] + 1 + h->b8_stride*(left_block[0]>>1)];
497
                    else
498
                        h->direct_cache[scan8[0] - 1 + 0*8]= 0;
499

    
500
                    if(IS_DIRECT(left_type[1]))
501
                        h->direct_cache[scan8[0] - 1 + 2*8]= 1;
502
                    else if(IS_8X8(left_type[1]))
503
                        h->direct_cache[scan8[0] - 1 + 2*8]= h->direct_table[h->mb2b8_xy[left_xy[1]] + 1 + h->b8_stride*(left_block[2]>>1)];
504
                    else
505
                        h->direct_cache[scan8[0] - 1 + 2*8]= 0;
506
                }
507
            }
508

    
509
            if(FRAME_MBAFF){
510
#define MAP_MVS\
511
                    MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
512
                    MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
513
                    MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
514
                    MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
515
                    MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
516
                    MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
517
                    MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
518
                    MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
519
                    MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
520
                    MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
521
                if(MB_FIELD){
522
#define MAP_F2F(idx, mb_type)\
523
                    if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
524
                        h->ref_cache[list][idx] <<= 1;\
525
                        h->mv_cache[list][idx][1] /= 2;\
526
                        h->mvd_cache[list][idx][1] /= 2;\
527
                    }
528
                    MAP_MVS
529
#undef MAP_F2F
530
                }else{
531
#define MAP_F2F(idx, mb_type)\
532
                    if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
533
                        h->ref_cache[list][idx] >>= 1;\
534
                        h->mv_cache[list][idx][1] <<= 1;\
535
                        h->mvd_cache[list][idx][1] <<= 1;\
536
                    }
537
                    MAP_MVS
538
#undef MAP_F2F
539
                }
540
            }
541
        }
542
    }
543
#endif
544

    
545
    h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
546
}
547

    
548
static inline void write_back_intra_pred_mode(H264Context *h){
549
    const int mb_xy= h->mb_xy;
550

    
551
    h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
552
    h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
553
    h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
554
    h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
555
    h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
556
    h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
557
    h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
558
}
559

    
560
/**
561
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
562
 */
563
static inline int check_intra4x4_pred_mode(H264Context *h){
564
    MpegEncContext * const s = &h->s;
565
    static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
566
    static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
567
    int i;
568

    
569
    if(!(h->top_samples_available&0x8000)){
570
        for(i=0; i<4; i++){
571
            int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
572
            if(status<0){
573
                av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
574
                return -1;
575
            } else if(status){
576
                h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
577
            }
578
        }
579
    }
580

    
581
    if((h->left_samples_available&0x8888)!=0x8888){
582
        static const int mask[4]={0x8000,0x2000,0x80,0x20};
583
        for(i=0; i<4; i++){
584
            if(!(h->left_samples_available&mask[i])){
585
                int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
586
                if(status<0){
587
                    av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
588
                    return -1;
589
                } else if(status){
590
                    h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
591
                }
592
            }
593
        }
594
    }
595

    
596
    return 0;
597
} //FIXME cleanup like next
598

    
599
/**
600
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
601
 */
602
static inline int check_intra_pred_mode(H264Context *h, int mode){
603
    MpegEncContext * const s = &h->s;
604
    static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
605
    static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
606

    
607
    if(mode > 6U) {
608
        av_log(h->s.avctx, AV_LOG_ERROR, "out of range intra chroma pred mode at %d %d\n", s->mb_x, s->mb_y);
609
        return -1;
610
    }
611

    
612
    if(!(h->top_samples_available&0x8000)){
613
        mode= top[ mode ];
614
        if(mode<0){
615
            av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
616
            return -1;
617
        }
618
    }
619

    
620
    if((h->left_samples_available&0x8080) != 0x8080){
621
        mode= left[ mode ];
622
        if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
623
            mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
624
        }
625
        if(mode<0){
626
            av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
627
            return -1;
628
        }
629
    }
630

    
631
    return mode;
632
}
633

    
634
/**
635
 * gets the predicted intra4x4 prediction mode.
636
 */
637
static inline int pred_intra_mode(H264Context *h, int n){
638
    const int index8= scan8[n];
639
    const int left= h->intra4x4_pred_mode_cache[index8 - 1];
640
    const int top = h->intra4x4_pred_mode_cache[index8 - 8];
641
    const int min= FFMIN(left, top);
642

    
643
    tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
644

    
645
    if(min<0) return DC_PRED;
646
    else      return min;
647
}
648

    
649
static inline void write_back_non_zero_count(H264Context *h){
650
    const int mb_xy= h->mb_xy;
651

    
652
    h->non_zero_count[mb_xy][0]= h->non_zero_count_cache[7+8*1];
653
    h->non_zero_count[mb_xy][1]= h->non_zero_count_cache[7+8*2];
654
    h->non_zero_count[mb_xy][2]= h->non_zero_count_cache[7+8*3];
655
    h->non_zero_count[mb_xy][3]= h->non_zero_count_cache[7+8*4];
656
    h->non_zero_count[mb_xy][4]= h->non_zero_count_cache[4+8*4];
657
    h->non_zero_count[mb_xy][5]= h->non_zero_count_cache[5+8*4];
658
    h->non_zero_count[mb_xy][6]= h->non_zero_count_cache[6+8*4];
659

    
660
    h->non_zero_count[mb_xy][9]= h->non_zero_count_cache[1+8*2];
661
    h->non_zero_count[mb_xy][8]= h->non_zero_count_cache[2+8*2];
662
    h->non_zero_count[mb_xy][7]= h->non_zero_count_cache[2+8*1];
663

    
664
    h->non_zero_count[mb_xy][12]=h->non_zero_count_cache[1+8*5];
665
    h->non_zero_count[mb_xy][11]=h->non_zero_count_cache[2+8*5];
666
    h->non_zero_count[mb_xy][10]=h->non_zero_count_cache[2+8*4];
667
}
668

    
669
/**
670
 * gets the predicted number of non-zero coefficients.
671
 * @param n block index
672
 */
673
static inline int pred_non_zero_count(H264Context *h, int n){
674
    const int index8= scan8[n];
675
    const int left= h->non_zero_count_cache[index8 - 1];
676
    const int top = h->non_zero_count_cache[index8 - 8];
677
    int i= left + top;
678

    
679
    if(i<64) i= (i+1)>>1;
680

    
681
    tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
682

    
683
    return i&31;
684
}
685

    
686
static inline int fetch_diagonal_mv(H264Context *h, const int16_t **C, int i, int list, int part_width){
687
    const int topright_ref= h->ref_cache[list][ i - 8 + part_width ];
688
    MpegEncContext *s = &h->s;
689

    
690
    /* there is no consistent mapping of mvs to neighboring locations that will
691
     * make mbaff happy, so we can't move all this logic to fill_caches */
692
    if(FRAME_MBAFF){
693
        const uint32_t *mb_types = s->current_picture_ptr->mb_type;
694
        const int16_t *mv;
695
        *(uint32_t*)h->mv_cache[list][scan8[0]-2] = 0;
696
        *C = h->mv_cache[list][scan8[0]-2];
697

    
698
        if(!MB_FIELD
699
           && (s->mb_y&1) && i < scan8[0]+8 && topright_ref != PART_NOT_AVAILABLE){
700
            int topright_xy = s->mb_x + (s->mb_y-1)*s->mb_stride + (i == scan8[0]+3);
701
            if(IS_INTERLACED(mb_types[topright_xy])){
702
#define SET_DIAG_MV(MV_OP, REF_OP, X4, Y4)\
703
                const int x4 = X4, y4 = Y4;\
704
                const int mb_type = mb_types[(x4>>2)+(y4>>2)*s->mb_stride];\
705
                if(!USES_LIST(mb_type,list))\
706
                    return LIST_NOT_USED;\
707
                mv = s->current_picture_ptr->motion_val[list][x4 + y4*h->b_stride];\
708
                h->mv_cache[list][scan8[0]-2][0] = mv[0];\
709
                h->mv_cache[list][scan8[0]-2][1] = mv[1] MV_OP;\
710
                return s->current_picture_ptr->ref_index[list][(x4>>1) + (y4>>1)*h->b8_stride] REF_OP;
711

    
712
                SET_DIAG_MV(*2, >>1, s->mb_x*4+(i&7)-4+part_width, s->mb_y*4-1);
713
            }
714
        }
715
        if(topright_ref == PART_NOT_AVAILABLE
716
           && ((s->mb_y&1) || i >= scan8[0]+8) && (i&7)==4
717
           && h->ref_cache[list][scan8[0]-1] != PART_NOT_AVAILABLE){
718
            if(!MB_FIELD
719
               && IS_INTERLACED(mb_types[h->left_mb_xy[0]])){
720
                SET_DIAG_MV(*2, >>1, s->mb_x*4-1, (s->mb_y|1)*4+(s->mb_y&1)*2+(i>>4)-1);
721
            }
722
            if(MB_FIELD
723
               && !IS_INTERLACED(mb_types[h->left_mb_xy[0]])
724
               && i >= scan8[0]+8){
725
                // left shift will turn LIST_NOT_USED into PART_NOT_AVAILABLE, but that's OK.
726
                SET_DIAG_MV(/2, <<1, s->mb_x*4-1, (s->mb_y&~1)*4 - 1 + ((i-scan8[0])>>3)*2);
727
            }
728
        }
729
#undef SET_DIAG_MV
730
    }
731

    
732
    if(topright_ref != PART_NOT_AVAILABLE){
733
        *C= h->mv_cache[list][ i - 8 + part_width ];
734
        return topright_ref;
735
    }else{
736
        tprintf(s->avctx, "topright MV not available\n");
737

    
738
        *C= h->mv_cache[list][ i - 8 - 1 ];
739
        return h->ref_cache[list][ i - 8 - 1 ];
740
    }
741
}
742

    
743
/**
744
 * gets the predicted MV.
745
 * @param n the block index
746
 * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
747
 * @param mx the x component of the predicted motion vector
748
 * @param my the y component of the predicted motion vector
749
 */
750
static inline void pred_motion(H264Context * const h, int n, int part_width, int list, int ref, int * const mx, int * const my){
751
    const int index8= scan8[n];
752
    const int top_ref=      h->ref_cache[list][ index8 - 8 ];
753
    const int left_ref=     h->ref_cache[list][ index8 - 1 ];
754
    const int16_t * const A= h->mv_cache[list][ index8 - 1 ];
755
    const int16_t * const B= h->mv_cache[list][ index8 - 8 ];
756
    const int16_t * C;
757
    int diagonal_ref, match_count;
758

    
759
    assert(part_width==1 || part_width==2 || part_width==4);
760

    
761
/* mv_cache
762
  B . . A T T T T
763
  U . . L . . , .
764
  U . . L . . . .
765
  U . . L . . , .
766
  . . . L . . . .
767
*/
768

    
769
    diagonal_ref= fetch_diagonal_mv(h, &C, index8, list, part_width);
770
    match_count= (diagonal_ref==ref) + (top_ref==ref) + (left_ref==ref);
771
    tprintf(h->s.avctx, "pred_motion match_count=%d\n", match_count);
772
    if(match_count > 1){ //most common
773
        *mx= mid_pred(A[0], B[0], C[0]);
774
        *my= mid_pred(A[1], B[1], C[1]);
775
    }else if(match_count==1){
776
        if(left_ref==ref){
777
            *mx= A[0];
778
            *my= A[1];
779
        }else if(top_ref==ref){
780
            *mx= B[0];
781
            *my= B[1];
782
        }else{
783
            *mx= C[0];
784
            *my= C[1];
785
        }
786
    }else{
787
        if(top_ref == PART_NOT_AVAILABLE && diagonal_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){
788
            *mx= A[0];
789
            *my= A[1];
790
        }else{
791
            *mx= mid_pred(A[0], B[0], C[0]);
792
            *my= mid_pred(A[1], B[1], C[1]);
793
        }
794
    }
795

    
796
    tprintf(h->s.avctx, "pred_motion (%2d %2d %2d) (%2d %2d %2d) (%2d %2d %2d) -> (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1],                    diagonal_ref, C[0], C[1], left_ref, A[0], A[1], ref, *mx, *my, h->s.mb_x, h->s.mb_y, n, list);
797
}
798

    
799
/**
800
 * gets the directionally predicted 16x8 MV.
801
 * @param n the block index
802
 * @param mx the x component of the predicted motion vector
803
 * @param my the y component of the predicted motion vector
804
 */
805
static inline void pred_16x8_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
806
    if(n==0){
807
        const int top_ref=      h->ref_cache[list][ scan8[0] - 8 ];
808
        const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];
809

    
810
        tprintf(h->s.avctx, "pred_16x8: (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1], h->s.mb_x, h->s.mb_y, n, list);
811

    
812
        if(top_ref == ref){
813
            *mx= B[0];
814
            *my= B[1];
815
            return;
816
        }
817
    }else{
818
        const int left_ref=     h->ref_cache[list][ scan8[8] - 1 ];
819
        const int16_t * const A= h->mv_cache[list][ scan8[8] - 1 ];
820

    
821
        tprintf(h->s.avctx, "pred_16x8: (%2d %2d %2d) at %2d %2d %d list %d\n", left_ref, A[0], A[1], h->s.mb_x, h->s.mb_y, n, list);
822

    
823
        if(left_ref == ref){
824
            *mx= A[0];
825
            *my= A[1];
826
            return;
827
        }
828
    }
829

    
830
    //RARE
831
    pred_motion(h, n, 4, list, ref, mx, my);
832
}
833

    
834
/**
835
 * gets the directionally predicted 8x16 MV.
836
 * @param n the block index
837
 * @param mx the x component of the predicted motion vector
838
 * @param my the y component of the predicted motion vector
839
 */
840
static inline void pred_8x16_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
841
    if(n==0){
842
        const int left_ref=      h->ref_cache[list][ scan8[0] - 1 ];
843
        const int16_t * const A=  h->mv_cache[list][ scan8[0] - 1 ];
844

    
845
        tprintf(h->s.avctx, "pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d\n", left_ref, A[0], A[1], h->s.mb_x, h->s.mb_y, n, list);
846

    
847
        if(left_ref == ref){
848
            *mx= A[0];
849
            *my= A[1];
850
            return;
851
        }
852
    }else{
853
        const int16_t * C;
854
        int diagonal_ref;
855

    
856
        diagonal_ref= fetch_diagonal_mv(h, &C, scan8[4], list, 2);
857

    
858
        tprintf(h->s.avctx, "pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d\n", diagonal_ref, C[0], C[1], h->s.mb_x, h->s.mb_y, n, list);
859

    
860
        if(diagonal_ref == ref){
861
            *mx= C[0];
862
            *my= C[1];
863
            return;
864
        }
865
    }
866

    
867
    //RARE
868
    pred_motion(h, n, 2, list, ref, mx, my);
869
}
870

    
871
static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my){
872
    const int top_ref = h->ref_cache[0][ scan8[0] - 8 ];
873
    const int left_ref= h->ref_cache[0][ scan8[0] - 1 ];
874

    
875
    tprintf(h->s.avctx, "pred_pskip: (%d) (%d) at %2d %2d\n", top_ref, left_ref, h->s.mb_x, h->s.mb_y);
876

    
877
    if(top_ref == PART_NOT_AVAILABLE || left_ref == PART_NOT_AVAILABLE
878
       || !( top_ref | *(uint32_t*)h->mv_cache[0][ scan8[0] - 8 ])
879
       || !(left_ref | *(uint32_t*)h->mv_cache[0][ scan8[0] - 1 ])){
880

    
881
        *mx = *my = 0;
882
        return;
883
    }
884

    
885
    pred_motion(h, 0, 4, 0, 0, mx, my);
886

    
887
    return;
888
}
889

    
890
static int get_scale_factor(H264Context * const h, int poc, int poc1, int i){
891
    int poc0 = h->ref_list[0][i].poc;
892
    int td = av_clip(poc1 - poc0, -128, 127);
893
    if(td == 0 || h->ref_list[0][i].long_ref){
894
        return 256;
895
    }else{
896
        int tb = av_clip(poc - poc0, -128, 127);
897
        int tx = (16384 + (FFABS(td) >> 1)) / td;
898
        return av_clip((tb*tx + 32) >> 6, -1024, 1023);
899
    }
900
}
901

    
902
static inline void direct_dist_scale_factor(H264Context * const h){
903
    MpegEncContext * const s = &h->s;
904
    const int poc = h->s.current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
905
    const int poc1 = h->ref_list[1][0].poc;
906
    int i, field;
907
    for(field=0; field<2; field++){
908
        const int poc  = h->s.current_picture_ptr->field_poc[field];
909
        const int poc1 = h->ref_list[1][0].field_poc[field];
910
        for(i=0; i < 2*h->ref_count[0]; i++)
911
            h->dist_scale_factor_field[field][i^field] = get_scale_factor(h, poc, poc1, i+16);
912
    }
913

    
914
    for(i=0; i<h->ref_count[0]; i++){
915
        h->dist_scale_factor[i] = get_scale_factor(h, poc, poc1, i);
916
    }
917
}
918

    
919
static void fill_colmap(H264Context *h, int map[2][16+32], int list, int field, int colfield, int mbafi){
920
    MpegEncContext * const s = &h->s;
921
    Picture * const ref1 = &h->ref_list[1][0];
922
    int j, old_ref, rfield;
923
    int start= mbafi ? 16                      : 0;
924
    int end  = mbafi ? 16+2*h->ref_count[list] : h->ref_count[list];
925
    int interl= mbafi || s->picture_structure != PICT_FRAME;
926

    
927
    /* bogus; fills in for missing frames */
928
    memset(map[list], 0, sizeof(map[list]));
929

    
930
    for(rfield=0; rfield<2; rfield++){
931
        for(old_ref=0; old_ref<ref1->ref_count[colfield][list]; old_ref++){
932
            int poc = ref1->ref_poc[colfield][list][old_ref];
933

    
934
            if     (!interl)
935
                poc |= 3;
936
            else if( interl && (poc&3) == 3) //FIXME store all MBAFF references so this isnt needed
937
                poc= (poc&~3) + rfield + 1;
938

    
939
            for(j=start; j<end; j++){
940
                if(4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3) == poc){
941
                    int cur_ref= mbafi ? (j-16)^field : j;
942
                    map[list][2*old_ref + (rfield^field) + 16] = cur_ref;
943
                    if(rfield == field)
944
                        map[list][old_ref] = cur_ref;
945
                    break;
946
                }
947
            }
948
        }
949
    }
950
}
951

    
952
static inline void direct_ref_list_init(H264Context * const h){
953
    MpegEncContext * const s = &h->s;
954
    Picture * const ref1 = &h->ref_list[1][0];
955
    Picture * const cur = s->current_picture_ptr;
956
    int list, j, field;
957
    int sidx= (s->picture_structure&1)^1;
958
    int ref1sidx= (ref1->reference&1)^1;
959

    
960
    for(list=0; list<2; list++){
961
        cur->ref_count[sidx][list] = h->ref_count[list];
962
        for(j=0; j<h->ref_count[list]; j++)
963
            cur->ref_poc[sidx][list][j] = 4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3);
964
    }
965

    
966
    if(s->picture_structure == PICT_FRAME){
967
        memcpy(cur->ref_count[1], cur->ref_count[0], sizeof(cur->ref_count[0]));
968
        memcpy(cur->ref_poc  [1], cur->ref_poc  [0], sizeof(cur->ref_poc  [0]));
969
    }
970

    
971
    cur->mbaff= FRAME_MBAFF;
972

    
973
    if(cur->pict_type != FF_B_TYPE || h->direct_spatial_mv_pred)
974
        return;
975

    
976
    for(list=0; list<2; list++){
977
        fill_colmap(h, h->map_col_to_list0, list, sidx, ref1sidx, 0);
978
        for(field=0; field<2; field++)
979
            fill_colmap(h, h->map_col_to_list0_field[field], list, field, field, 1);
980
    }
981
}
982

    
983
static inline void pred_direct_motion(H264Context * const h, int *mb_type){
984
    MpegEncContext * const s = &h->s;
985
    int b8_stride = h->b8_stride;
986
    int b4_stride = h->b_stride;
987
    int mb_xy = h->mb_xy;
988
    int mb_type_col[2];
989
    const int16_t (*l1mv0)[2], (*l1mv1)[2];
990
    const int8_t *l1ref0, *l1ref1;
991
    const int is_b8x8 = IS_8X8(*mb_type);
992
    unsigned int sub_mb_type;
993
    int i8, i4;
994

    
995
#define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
996

    
997
    if(IS_INTERLACED(h->ref_list[1][0].mb_type[mb_xy])){ // AFL/AFR/FR/FL -> AFL/FL
998
        if(!IS_INTERLACED(*mb_type)){                    //     AFR/FR    -> AFL/FL
999
            int cur_poc = s->current_picture_ptr->poc;
1000
            int *col_poc = h->ref_list[1]->field_poc;
1001
            int col_parity = FFABS(col_poc[0] - cur_poc) >= FFABS(col_poc[1] - cur_poc);
1002
            mb_xy= s->mb_x + ((s->mb_y&~1) + col_parity)*s->mb_stride;
1003
            b8_stride = 0;
1004
        }else if(!(s->picture_structure & h->ref_list[1][0].reference) && !h->ref_list[1][0].mbaff){// FL -> FL & differ parity
1005
            int fieldoff= 2*(h->ref_list[1][0].reference)-3;
1006
            mb_xy += s->mb_stride*fieldoff;
1007
        }
1008
        goto single_col;
1009
    }else{                                               // AFL/AFR/FR/FL -> AFR/FR
1010
        if(IS_INTERLACED(*mb_type)){                     // AFL       /FL -> AFR/FR
1011
            mb_xy= s->mb_x + (s->mb_y&~1)*s->mb_stride;
1012
            mb_type_col[0] = h->ref_list[1][0].mb_type[mb_xy];
1013
            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy + s->mb_stride];
1014
            b8_stride *= 3;
1015
            b4_stride *= 6;
1016
            //FIXME IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag
1017
            if(    (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
1018
                && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
1019
                && !is_b8x8){
1020
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1021
                *mb_type   |= MB_TYPE_16x8 |MB_TYPE_L0L1|MB_TYPE_DIRECT2; /* B_16x8 */
1022
            }else{
1023
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1024
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1025
            }
1026
        }else{                                           //     AFR/FR    -> AFR/FR
1027
single_col:
1028
            mb_type_col[0] =
1029
            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy];
1030
            if(IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag){
1031
                /* FIXME save sub mb types from previous frames (or derive from MVs)
1032
                * so we know exactly what block size to use */
1033
                sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
1034
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1035
            }else if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
1036
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1037
                *mb_type   |= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
1038
            }else{
1039
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1040
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1041
            }
1042
        }
1043
    }
1044

    
1045
    l1mv0  = &h->ref_list[1][0].motion_val[0][h->mb2b_xy [mb_xy]];
1046
    l1mv1  = &h->ref_list[1][0].motion_val[1][h->mb2b_xy [mb_xy]];
1047
    l1ref0 = &h->ref_list[1][0].ref_index [0][h->mb2b8_xy[mb_xy]];
1048
    l1ref1 = &h->ref_list[1][0].ref_index [1][h->mb2b8_xy[mb_xy]];
1049
    if(!b8_stride){
1050
        if(s->mb_y&1){
1051
            l1ref0 += h->b8_stride;
1052
            l1ref1 += h->b8_stride;
1053
            l1mv0  +=  2*b4_stride;
1054
            l1mv1  +=  2*b4_stride;
1055
        }
1056
    }
1057

    
1058
    if(h->direct_spatial_mv_pred){
1059
        int ref[2];
1060
        int mv[2][2];
1061
        int list;
1062

    
1063
        /* FIXME interlacing + spatial direct uses wrong colocated block positions */
1064

    
1065
        /* ref = min(neighbors) */
1066
        for(list=0; list<2; list++){
1067
            int refa = h->ref_cache[list][scan8[0] - 1];
1068
            int refb = h->ref_cache[list][scan8[0] - 8];
1069
            int refc = h->ref_cache[list][scan8[0] - 8 + 4];
1070
            if(refc == PART_NOT_AVAILABLE)
1071
                refc = h->ref_cache[list][scan8[0] - 8 - 1];
1072
            ref[list] = FFMIN3((unsigned)refa, (unsigned)refb, (unsigned)refc);
1073
            if(ref[list] < 0)
1074
                ref[list] = -1;
1075
        }
1076

    
1077
        if(ref[0] < 0 && ref[1] < 0){
1078
            ref[0] = ref[1] = 0;
1079
            mv[0][0] = mv[0][1] =
1080
            mv[1][0] = mv[1][1] = 0;
1081
        }else{
1082
            for(list=0; list<2; list++){
1083
                if(ref[list] >= 0)
1084
                    pred_motion(h, 0, 4, list, ref[list], &mv[list][0], &mv[list][1]);
1085
                else
1086
                    mv[list][0] = mv[list][1] = 0;
1087
            }
1088
        }
1089

    
1090
        if(ref[1] < 0){
1091
            if(!is_b8x8)
1092
                *mb_type &= ~MB_TYPE_L1;
1093
            sub_mb_type &= ~MB_TYPE_L1;
1094
        }else if(ref[0] < 0){
1095
            if(!is_b8x8)
1096
                *mb_type &= ~MB_TYPE_L0;
1097
            sub_mb_type &= ~MB_TYPE_L0;
1098
        }
1099

    
1100
        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
1101
            for(i8=0; i8<4; i8++){
1102
                int x8 = i8&1;
1103
                int y8 = i8>>1;
1104
                int xy8 = x8+y8*b8_stride;
1105
                int xy4 = 3*x8+y8*b4_stride;
1106
                int a=0, b=0;
1107

    
1108
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1109
                    continue;
1110
                h->sub_mb_type[i8] = sub_mb_type;
1111

    
1112
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1113
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1114
                if(!IS_INTRA(mb_type_col[y8])
1115
                   && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
1116
                       || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
1117
                    if(ref[0] > 0)
1118
                        a= pack16to32(mv[0][0],mv[0][1]);
1119
                    if(ref[1] > 0)
1120
                        b= pack16to32(mv[1][0],mv[1][1]);
1121
                }else{
1122
                    a= pack16to32(mv[0][0],mv[0][1]);
1123
                    b= pack16to32(mv[1][0],mv[1][1]);
1124
                }
1125
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
1126
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
1127
            }
1128
        }else if(IS_16X16(*mb_type)){
1129
            int a=0, b=0;
1130

    
1131
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
1132
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
1133
            if(!IS_INTRA(mb_type_col[0])
1134
               && (   (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
1135
                   || (l1ref0[0]  < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
1136
                       && (h->x264_build>33 || !h->x264_build)))){
1137
                if(ref[0] > 0)
1138
                    a= pack16to32(mv[0][0],mv[0][1]);
1139
                if(ref[1] > 0)
1140
                    b= pack16to32(mv[1][0],mv[1][1]);
1141
            }else{
1142
                a= pack16to32(mv[0][0],mv[0][1]);
1143
                b= pack16to32(mv[1][0],mv[1][1]);
1144
            }
1145
            fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
1146
            fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
1147
        }else{
1148
            for(i8=0; i8<4; i8++){
1149
                const int x8 = i8&1;
1150
                const int y8 = i8>>1;
1151

    
1152
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1153
                    continue;
1154
                h->sub_mb_type[i8] = sub_mb_type;
1155

    
1156
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mv[0][0],mv[0][1]), 4);
1157
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mv[1][0],mv[1][1]), 4);
1158
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1159
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1160

    
1161
                /* col_zero_flag */
1162
                if(!IS_INTRA(mb_type_col[0]) && (   l1ref0[x8 + y8*b8_stride] == 0
1163
                                              || (l1ref0[x8 + y8*b8_stride] < 0 && l1ref1[x8 + y8*b8_stride] == 0
1164
                                                  && (h->x264_build>33 || !h->x264_build)))){
1165
                    const int16_t (*l1mv)[2]= l1ref0[x8 + y8*b8_stride] == 0 ? l1mv0 : l1mv1;
1166
                    if(IS_SUB_8X8(sub_mb_type)){
1167
                        const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
1168
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1169
                            if(ref[0] == 0)
1170
                                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1171
                            if(ref[1] == 0)
1172
                                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1173
                        }
1174
                    }else
1175
                    for(i4=0; i4<4; i4++){
1176
                        const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1177
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1178
                            if(ref[0] == 0)
1179
                                *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
1180
                            if(ref[1] == 0)
1181
                                *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] = 0;
1182
                        }
1183
                    }
1184
                }
1185
            }
1186
        }
1187
    }else{ /* direct temporal mv pred */
1188
        const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
1189
        const int *dist_scale_factor = h->dist_scale_factor;
1190
        int ref_offset= 0;
1191

    
1192
        if(FRAME_MBAFF && IS_INTERLACED(*mb_type)){
1193
            map_col_to_list0[0] = h->map_col_to_list0_field[s->mb_y&1][0];
1194
            map_col_to_list0[1] = h->map_col_to_list0_field[s->mb_y&1][1];
1195
            dist_scale_factor   =h->dist_scale_factor_field[s->mb_y&1];
1196
        }
1197
        if(h->ref_list[1][0].mbaff && IS_INTERLACED(mb_type_col[0]))
1198
            ref_offset += 16;
1199

    
1200
        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
1201
            /* FIXME assumes direct_8x8_inference == 1 */
1202
            int y_shift  = 2*!IS_INTERLACED(*mb_type);
1203

    
1204
            for(i8=0; i8<4; i8++){
1205
                const int x8 = i8&1;
1206
                const int y8 = i8>>1;
1207
                int ref0, scale;
1208
                const int16_t (*l1mv)[2]= l1mv0;
1209

    
1210
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1211
                    continue;
1212
                h->sub_mb_type[i8] = sub_mb_type;
1213

    
1214
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1215
                if(IS_INTRA(mb_type_col[y8])){
1216
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1217
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1218
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1219
                    continue;
1220
                }
1221

    
1222
                ref0 = l1ref0[x8 + y8*b8_stride];
1223
                if(ref0 >= 0)
1224
                    ref0 = map_col_to_list0[0][ref0 + ref_offset];
1225
                else{
1226
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
1227
                    l1mv= l1mv1;
1228
                }
1229
                scale = dist_scale_factor[ref0];
1230
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1231

    
1232
                {
1233
                    const int16_t *mv_col = l1mv[x8*3 + y8*b4_stride];
1234
                    int my_col = (mv_col[1]<<y_shift)/2;
1235
                    int mx = (scale * mv_col[0] + 128) >> 8;
1236
                    int my = (scale * my_col + 128) >> 8;
1237
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1238
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
1239
                }
1240
            }
1241
            return;
1242
        }
1243

    
1244
        /* one-to-one mv scaling */
1245

    
1246
        if(IS_16X16(*mb_type)){
1247
            int ref, mv0, mv1;
1248

    
1249
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
1250
            if(IS_INTRA(mb_type_col[0])){
1251
                ref=mv0=mv1=0;
1252
            }else{
1253
                const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0] + ref_offset]
1254
                                                : map_col_to_list0[1][l1ref1[0] + ref_offset];
1255
                const int scale = dist_scale_factor[ref0];
1256
                const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
1257
                int mv_l0[2];
1258
                mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1259
                mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1260
                ref= ref0;
1261
                mv0= pack16to32(mv_l0[0],mv_l0[1]);
1262
                mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1263
            }
1264
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
1265
            fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
1266
            fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
1267
        }else{
1268
            for(i8=0; i8<4; i8++){
1269
                const int x8 = i8&1;
1270
                const int y8 = i8>>1;
1271
                int ref0, scale;
1272
                const int16_t (*l1mv)[2]= l1mv0;
1273

    
1274
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1275
                    continue;
1276
                h->sub_mb_type[i8] = sub_mb_type;
1277
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1278
                if(IS_INTRA(mb_type_col[0])){
1279
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1280
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1281
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1282
                    continue;
1283
                }
1284

    
1285
                ref0 = l1ref0[x8 + y8*b8_stride] + ref_offset;
1286
                if(ref0 >= 0)
1287
                    ref0 = map_col_to_list0[0][ref0];
1288
                else{
1289
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
1290
                    l1mv= l1mv1;
1291
                }
1292
                scale = dist_scale_factor[ref0];
1293

    
1294
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1295
                if(IS_SUB_8X8(sub_mb_type)){
1296
                    const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
1297
                    int mx = (scale * mv_col[0] + 128) >> 8;
1298
                    int my = (scale * mv_col[1] + 128) >> 8;
1299
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1300
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
1301
                }else
1302
                for(i4=0; i4<4; i4++){
1303
                    const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1304
                    int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
1305
                    mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1306
                    mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1307
                    *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] =
1308
                        pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1309
                }
1310
            }
1311
        }
1312
    }
1313
}
1314

    
1315
static inline void write_back_motion(H264Context *h, int mb_type){
1316
    MpegEncContext * const s = &h->s;
1317
    const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1318
    const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1319
    int list;
1320

    
1321
    if(!USES_LIST(mb_type, 0))
1322
        fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);
1323

    
1324
    for(list=0; list<h->list_count; list++){
1325
        int y;
1326
        if(!USES_LIST(mb_type, list))
1327
            continue;
1328

    
1329
        for(y=0; y<4; y++){
1330
            *(uint64_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+0 + 8*y];
1331
            *(uint64_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+2 + 8*y];
1332
        }
1333
        if( h->pps.cabac ) {
1334
            if(IS_SKIP(mb_type))
1335
                fill_rectangle(h->mvd_table[list][b_xy], 4, 4, h->b_stride, 0, 4);
1336
            else
1337
            for(y=0; y<4; y++){
1338
                *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+0 + 8*y];
1339
                *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+2 + 8*y];
1340
            }
1341
        }
1342

    
1343
        {
1344
            int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1345
            ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
1346
            ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
1347
            ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
1348
            ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
1349
        }
1350
    }
1351

    
1352
    if(h->slice_type_nos == FF_B_TYPE && h->pps.cabac){
1353
        if(IS_8X8(mb_type)){
1354
            uint8_t *direct_table = &h->direct_table[b8_xy];
1355
            direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
1356
            direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
1357
            direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1358
        }
1359
    }
1360
}
1361

    
1362
const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
1363
    int i, si, di;
1364
    uint8_t *dst;
1365
    int bufidx;
1366

    
1367
//    src[0]&0x80;                //forbidden bit
1368
    h->nal_ref_idc= src[0]>>5;
1369
    h->nal_unit_type= src[0]&0x1F;
1370

    
1371
    src++; length--;
1372
#if 0
1373
    for(i=0; i<length; i++)
1374
        printf("%2X ", src[i]);
1375
#endif
1376

    
1377
#if HAVE_FAST_UNALIGNED
1378
# if HAVE_FAST_64BIT
1379
#   define RS 7
1380
    for(i=0; i+1<length; i+=9){
1381
        if(!((~*(const uint64_t*)(src+i) & (*(const uint64_t*)(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
1382
# else
1383
#   define RS 3
1384
    for(i=0; i+1<length; i+=5){
1385
        if(!((~*(const uint32_t*)(src+i) & (*(const uint32_t*)(src+i) - 0x01000101U)) & 0x80008080U))
1386
# endif
1387
            continue;
1388
        if(i>0 && !src[i]) i--;
1389
        while(src[i]) i++;
1390
#else
1391
#   define RS 0
1392
    for(i=0; i+1<length; i+=2){
1393
        if(src[i]) continue;
1394
        if(i>0 && src[i-1]==0) i--;
1395
#endif
1396
        if(i+2<length && src[i+1]==0 && src[i+2]<=3){
1397
            if(src[i+2]!=3){
1398
                /* startcode, so we must be past the end */
1399
                length=i;
1400
            }
1401
            break;
1402
        }
1403
        i-= RS;
1404
    }
1405

    
1406
    if(i>=length-1){ //no escaped 0
1407
        *dst_length= length;
1408
        *consumed= length+1; //+1 for the header
1409
        return src;
1410
    }
1411

    
1412
    bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
1413
    h->rbsp_buffer[bufidx]= av_fast_realloc(h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
1414
    dst= h->rbsp_buffer[bufidx];
1415

    
1416
    if (dst == NULL){
1417
        return NULL;
1418
    }
1419

    
1420
//printf("decoding esc\n");
1421
    memcpy(dst, src, i);
1422
    si=di=i;
1423
    while(si+2<length){
1424
        //remove escapes (very rare 1:2^22)
1425
        if(src[si+2]>3){
1426
            dst[di++]= src[si++];
1427
            dst[di++]= src[si++];
1428
        }else if(src[si]==0 && src[si+1]==0){
1429
            if(src[si+2]==3){ //escape
1430
                dst[di++]= 0;
1431
                dst[di++]= 0;
1432
                si+=3;
1433
                continue;
1434
            }else //next start code
1435
                goto nsc;
1436
        }
1437

    
1438
        dst[di++]= src[si++];
1439
    }
1440
    while(si<length)
1441
        dst[di++]= src[si++];
1442
nsc:
1443

    
1444
    memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1445

    
1446
    *dst_length= di;
1447
    *consumed= si + 1;//+1 for the header
1448
//FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
1449
    return dst;
1450
}
1451

    
1452
int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
1453
    int v= *src;
1454
    int r;
1455

    
1456
    tprintf(h->s.avctx, "rbsp trailing %X\n", v);
1457

    
1458
    for(r=1; r<9; r++){
1459
        if(v&1) return r;
1460
        v>>=1;
1461
    }
1462
    return 0;
1463
}
1464

    
1465
/**
1466
 * IDCT transforms the 16 dc values and dequantizes them.
1467
 * @param qp quantization parameter
1468
 */
1469
static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1470
#define stride 16
1471
    int i;
1472
    int temp[16]; //FIXME check if this is a good idea
1473
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1474
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1475

    
1476
//memset(block, 64, 2*256);
1477
//return;
1478
    for(i=0; i<4; i++){
1479
        const int offset= y_offset[i];
1480
        const int z0= block[offset+stride*0] + block[offset+stride*4];
1481
        const int z1= block[offset+stride*0] - block[offset+stride*4];
1482
        const int z2= block[offset+stride*1] - block[offset+stride*5];
1483
        const int z3= block[offset+stride*1] + block[offset+stride*5];
1484

    
1485
        temp[4*i+0]= z0+z3;
1486
        temp[4*i+1]= z1+z2;
1487
        temp[4*i+2]= z1-z2;
1488
        temp[4*i+3]= z0-z3;
1489
    }
1490

    
1491
    for(i=0; i<4; i++){
1492
        const int offset= x_offset[i];
1493
        const int z0= temp[4*0+i] + temp[4*2+i];
1494
        const int z1= temp[4*0+i] - temp[4*2+i];
1495
        const int z2= temp[4*1+i] - temp[4*3+i];
1496
        const int z3= temp[4*1+i] + temp[4*3+i];
1497

    
1498
        block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
1499
        block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
1500
        block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
1501
        block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
1502
    }
1503
}
1504

    
1505
#if 0
1506
/**
1507
 * DCT transforms the 16 dc values.
1508
 * @param qp quantization parameter ??? FIXME
1509
 */
1510
static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
1511
//    const int qmul= dequant_coeff[qp][0];
1512
    int i;
1513
    int temp[16]; //FIXME check if this is a good idea
1514
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1515
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1516

1517
    for(i=0; i<4; i++){
1518
        const int offset= y_offset[i];
1519
        const int z0= block[offset+stride*0] + block[offset+stride*4];
1520
        const int z1= block[offset+stride*0] - block[offset+stride*4];
1521
        const int z2= block[offset+stride*1] - block[offset+stride*5];
1522
        const int z3= block[offset+stride*1] + block[offset+stride*5];
1523

1524
        temp[4*i+0]= z0+z3;
1525
        temp[4*i+1]= z1+z2;
1526
        temp[4*i+2]= z1-z2;
1527
        temp[4*i+3]= z0-z3;
1528
    }
1529

1530
    for(i=0; i<4; i++){
1531
        const int offset= x_offset[i];
1532
        const int z0= temp[4*0+i] + temp[4*2+i];
1533
        const int z1= temp[4*0+i] - temp[4*2+i];
1534
        const int z2= temp[4*1+i] - temp[4*3+i];
1535
        const int z3= temp[4*1+i] + temp[4*3+i];
1536

1537
        block[stride*0 +offset]= (z0 + z3)>>1;
1538
        block[stride*2 +offset]= (z1 + z2)>>1;
1539
        block[stride*8 +offset]= (z1 - z2)>>1;
1540
        block[stride*10+offset]= (z0 - z3)>>1;
1541
    }
1542
}
1543
#endif
1544

    
1545
#undef xStride
1546
#undef stride
1547

    
1548
static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1549
    const int stride= 16*2;
1550
    const int xStride= 16;
1551
    int a,b,c,d,e;
1552

    
1553
    a= block[stride*0 + xStride*0];
1554
    b= block[stride*0 + xStride*1];
1555
    c= block[stride*1 + xStride*0];
1556
    d= block[stride*1 + xStride*1];
1557

    
1558
    e= a-b;
1559
    a= a+b;
1560
    b= c-d;
1561
    c= c+d;
1562

    
1563
    block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
1564
    block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
1565
    block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
1566
    block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
1567
}
1568

    
1569
#if 0
1570
static void chroma_dc_dct_c(DCTELEM *block){
1571
    const int stride= 16*2;
1572
    const int xStride= 16;
1573
    int a,b,c,d,e;
1574

1575
    a= block[stride*0 + xStride*0];
1576
    b= block[stride*0 + xStride*1];
1577
    c= block[stride*1 + xStride*0];
1578
    d= block[stride*1 + xStride*1];
1579

1580
    e= a-b;
1581
    a= a+b;
1582
    b= c-d;
1583
    c= c+d;
1584

1585
    block[stride*0 + xStride*0]= (a+c);
1586
    block[stride*0 + xStride*1]= (e+b);
1587
    block[stride*1 + xStride*0]= (a-c);
1588
    block[stride*1 + xStride*1]= (e-b);
1589
}
1590
#endif
1591

    
1592
/**
1593
 * gets the chroma qp.
1594
 */
1595
static inline int get_chroma_qp(H264Context *h, int t, int qscale){
1596
    return h->pps.chroma_qp_table[t][qscale];
1597
}
1598

    
1599
static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
1600
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1601
                           int src_x_offset, int src_y_offset,
1602
                           qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
1603
    MpegEncContext * const s = &h->s;
1604
    const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
1605
    int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
1606
    const int luma_xy= (mx&3) + ((my&3)<<2);
1607
    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
1608
    uint8_t * src_cb, * src_cr;
1609
    int extra_width= h->emu_edge_width;
1610
    int extra_height= h->emu_edge_height;
1611
    int emu=0;
1612
    const int full_mx= mx>>2;
1613
    const int full_my= my>>2;
1614
    const int pic_width  = 16*s->mb_width;
1615
    const int pic_height = 16*s->mb_height >> MB_FIELD;
1616

    
1617
    if(mx&7) extra_width -= 3;
1618
    if(my&7) extra_height -= 3;
1619

    
1620
    if(   full_mx < 0-extra_width
1621
       || full_my < 0-extra_height
1622
       || full_mx + 16/*FIXME*/ > pic_width + extra_width
1623
       || full_my + 16/*FIXME*/ > pic_height + extra_height){
1624
        ff_emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->mb_linesize, h->mb_linesize, 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
1625
            src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
1626
        emu=1;
1627
    }
1628

    
1629
    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
1630
    if(!square){
1631
        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
1632
    }
1633

    
1634
    if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
1635

    
1636
    if(MB_FIELD){
1637
        // chroma offset when predicting from a field of opposite parity
1638
        my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
1639
        emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
1640
    }
1641
    src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1642
    src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1643

    
1644
    if(emu){
1645
        ff_emulated_edge_mc(s->edge_emu_buffer, src_cb, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
1646
            src_cb= s->edge_emu_buffer;
1647
    }
1648
    chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1649

    
1650
    if(emu){
1651
        ff_emulated_edge_mc(s->edge_emu_buffer, src_cr, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
1652
            src_cr= s->edge_emu_buffer;
1653
    }
1654
    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1655
}
1656

    
1657
static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
1658
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1659
                           int x_offset, int y_offset,
1660
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1661
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1662
                           int list0, int list1){
1663
    MpegEncContext * const s = &h->s;
1664
    qpel_mc_func *qpix_op=  qpix_put;
1665
    h264_chroma_mc_func chroma_op= chroma_put;
1666

    
1667
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1668
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1669
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1670
    x_offset += 8*s->mb_x;
1671
    y_offset += 8*(s->mb_y >> MB_FIELD);
1672

    
1673
    if(list0){
1674
        Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
1675
        mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
1676
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
1677
                           qpix_op, chroma_op);
1678

    
1679
        qpix_op=  qpix_avg;
1680
        chroma_op= chroma_avg;
1681
    }
1682

    
1683
    if(list1){
1684
        Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
1685
        mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
1686
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
1687
                           qpix_op, chroma_op);
1688
    }
1689
}
1690

    
1691
static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
1692
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1693
                           int x_offset, int y_offset,
1694
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1695
                           h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
1696
                           h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
1697
                           int list0, int list1){
1698
    MpegEncContext * const s = &h->s;
1699

    
1700
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1701
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1702
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1703
    x_offset += 8*s->mb_x;
1704
    y_offset += 8*(s->mb_y >> MB_FIELD);
1705

    
1706
    if(list0 && list1){
1707
        /* don't optimize for luma-only case, since B-frames usually
1708
         * use implicit weights => chroma too. */
1709
        uint8_t *tmp_cb = s->obmc_scratchpad;
1710
        uint8_t *tmp_cr = s->obmc_scratchpad + 8;
1711
        uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
1712
        int refn0 = h->ref_cache[0][ scan8[n] ];
1713
        int refn1 = h->ref_cache[1][ scan8[n] ];
1714

    
1715
        mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
1716
                    dest_y, dest_cb, dest_cr,
1717
                    x_offset, y_offset, qpix_put, chroma_put);
1718
        mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
1719
                    tmp_y, tmp_cb, tmp_cr,
1720
                    x_offset, y_offset, qpix_put, chroma_put);
1721

    
1722
        if(h->use_weight == 2){
1723
            int weight0 = h->implicit_weight[refn0][refn1];
1724
            int weight1 = 64 - weight0;
1725
            luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
1726
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
1727
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
1728
        }else{
1729
            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
1730
                            h->luma_weight[0][refn0], h->luma_weight[1][refn1],
1731
                            h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
1732
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1733
                            h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
1734
                            h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
1735
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1736
                            h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
1737
                            h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
1738
        }
1739
    }else{
1740
        int list = list1 ? 1 : 0;
1741
        int refn = h->ref_cache[list][ scan8[n] ];
1742
        Picture *ref= &h->ref_list[list][refn];
1743
        mc_dir_part(h, ref, n, square, chroma_height, delta, list,
1744
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
1745
                    qpix_put, chroma_put);
1746

    
1747
        luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
1748
                       h->luma_weight[list][refn], h->luma_offset[list][refn]);
1749
        if(h->use_weight_chroma){
1750
            chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1751
                             h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
1752
            chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1753
                             h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
1754
        }
1755
    }
1756
}
1757

    
1758
static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
1759
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1760
                           int x_offset, int y_offset,
1761
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1762
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1763
                           h264_weight_func *weight_op, h264_biweight_func *weight_avg,
1764
                           int list0, int list1){
1765
    if((h->use_weight==2 && list0 && list1
1766
        && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
1767
       || h->use_weight==1)
1768
        mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1769
                         x_offset, y_offset, qpix_put, chroma_put,
1770
                         weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
1771
    else
1772
        mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1773
                    x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
1774
}
1775

    
1776
static inline void prefetch_motion(H264Context *h, int list){
1777
    /* fetch pixels for estimated mv 4 macroblocks ahead
1778
     * optimized for 64byte cache lines */
1779
    MpegEncContext * const s = &h->s;
1780
    const int refn = h->ref_cache[list][scan8[0]];
1781
    if(refn >= 0){
1782
        const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
1783
        const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
1784
        uint8_t **src= h->ref_list[list][refn].data;
1785
        int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
1786
        s->dsp.prefetch(src[0]+off, s->linesize, 4);
1787
        off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
1788
        s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
1789
    }
1790
}
1791

    
1792
static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1793
                      qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
1794
                      qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
1795
                      h264_weight_func *weight_op, h264_biweight_func *weight_avg){
1796
    MpegEncContext * const s = &h->s;
1797
    const int mb_xy= h->mb_xy;
1798
    const int mb_type= s->current_picture.mb_type[mb_xy];
1799

    
1800
    assert(IS_INTER(mb_type));
1801

    
1802
    prefetch_motion(h, 0);
1803

    
1804
    if(IS_16X16(mb_type)){
1805
        mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
1806
                qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
1807
                &weight_op[0], &weight_avg[0],
1808
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1809
    }else if(IS_16X8(mb_type)){
1810
        mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
1811
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1812
                &weight_op[1], &weight_avg[1],
1813
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1814
        mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
1815
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1816
                &weight_op[1], &weight_avg[1],
1817
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1818
    }else if(IS_8X16(mb_type)){
1819
        mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
1820
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1821
                &weight_op[2], &weight_avg[2],
1822
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1823
        mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
1824
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1825
                &weight_op[2], &weight_avg[2],
1826
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1827
    }else{
1828
        int i;
1829

    
1830
        assert(IS_8X8(mb_type));
1831

    
1832
        for(i=0; i<4; i++){
1833
            const int sub_mb_type= h->sub_mb_type[i];
1834
            const int n= 4*i;
1835
            int x_offset= (i&1)<<2;
1836
            int y_offset= (i&2)<<1;
1837

    
1838
            if(IS_SUB_8X8(sub_mb_type)){
1839
                mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1840
                    qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1841
                    &weight_op[3], &weight_avg[3],
1842
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1843
            }else if(IS_SUB_8X4(sub_mb_type)){
1844
                mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1845
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1846
                    &weight_op[4], &weight_avg[4],
1847
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1848
                mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
1849
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1850
                    &weight_op[4], &weight_avg[4],
1851
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1852
            }else if(IS_SUB_4X8(sub_mb_type)){
1853
                mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1854
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1855
                    &weight_op[5], &weight_avg[5],
1856
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1857
                mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
1858
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1859
                    &weight_op[5], &weight_avg[5],
1860
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1861
            }else{
1862
                int j;
1863
                assert(IS_SUB_4X4(sub_mb_type));
1864
                for(j=0; j<4; j++){
1865
                    int sub_x_offset= x_offset + 2*(j&1);
1866
                    int sub_y_offset= y_offset +   (j&2);
1867
                    mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
1868
                        qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1869
                        &weight_op[6], &weight_avg[6],
1870
                        IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1871
                }
1872
            }
1873
        }
1874
    }
1875

    
1876
    prefetch_motion(h, 1);
1877
}
1878

    
1879
static av_cold void init_cavlc_level_tab(void){
1880
    int suffix_length, mask;
1881
    unsigned int i;
1882

    
1883
    for(suffix_length=0; suffix_length<7; suffix_length++){
1884
        for(i=0; i<(1<<LEVEL_TAB_BITS); i++){
1885
            int prefix= LEVEL_TAB_BITS - av_log2(2*i);
1886
            int level_code= (prefix<<suffix_length) + (i>>(LEVEL_TAB_BITS-prefix-1-suffix_length)) - (1<<suffix_length);
1887

    
1888
            mask= -(level_code&1);
1889
            level_code= (((2+level_code)>>1) ^ mask) - mask;
1890
            if(prefix + 1 + suffix_length <= LEVEL_TAB_BITS){
1891
                cavlc_level_tab[suffix_length][i][0]= level_code;
1892
                cavlc_level_tab[suffix_length][i][1]= prefix + 1 + suffix_length;
1893
            }else if(prefix + 1 <= LEVEL_TAB_BITS){
1894
                cavlc_level_tab[suffix_length][i][0]= prefix+100;
1895
                cavlc_level_tab[suffix_length][i][1]= prefix + 1;
1896
            }else{
1897
                cavlc_level_tab[suffix_length][i][0]= LEVEL_TAB_BITS+100;
1898
                cavlc_level_tab[suffix_length][i][1]= LEVEL_TAB_BITS;
1899
            }
1900
        }
1901
    }
1902
}
1903

    
1904
static av_cold void decode_init_vlc(void){
1905
    static int done = 0;
1906

    
1907
    if (!done) {
1908
        int i;
1909
        int offset;
1910
        done = 1;
1911

    
1912
        chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table;
1913
        chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size;
1914
        init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
1915
                 &chroma_dc_coeff_token_len [0], 1, 1,
1916
                 &chroma_dc_coeff_token_bits[0], 1, 1,
1917
                 INIT_VLC_USE_NEW_STATIC);
1918

    
1919
        offset = 0;
1920
        for(i=0; i<4; i++){
1921
            coeff_token_vlc[i].table = coeff_token_vlc_tables+offset;
1922
            coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i];
1923
            init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
1924
                     &coeff_token_len [i][0], 1, 1,
1925
                     &coeff_token_bits[i][0], 1, 1,
1926
                     INIT_VLC_USE_NEW_STATIC);
1927
            offset += coeff_token_vlc_tables_size[i];
1928
        }
1929
        /*
1930
         * This is a one time safety check to make sure that
1931
         * the packed static coeff_token_vlc table sizes
1932
         * were initialized correctly.
1933
         */
1934
        assert(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));
1935

    
1936
        for(i=0; i<3; i++){
1937
            chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i];
1938
            chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size;
1939
            init_vlc(&chroma_dc_total_zeros_vlc[i],
1940
                     CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
1941
                     &chroma_dc_total_zeros_len [i][0], 1, 1,
1942
                     &chroma_dc_total_zeros_bits[i][0], 1, 1,
1943
                     INIT_VLC_USE_NEW_STATIC);
1944
        }
1945
        for(i=0; i<15; i++){
1946
            total_zeros_vlc[i].table = total_zeros_vlc_tables[i];
1947
            total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size;
1948
            init_vlc(&total_zeros_vlc[i],
1949
                     TOTAL_ZEROS_VLC_BITS, 16,
1950
                     &total_zeros_len [i][0], 1, 1,
1951
                     &total_zeros_bits[i][0], 1, 1,
1952
                     INIT_VLC_USE_NEW_STATIC);
1953
        }
1954

    
1955
        for(i=0; i<6; i++){
1956
            run_vlc[i].table = run_vlc_tables[i];
1957
            run_vlc[i].table_allocated = run_vlc_tables_size;
1958
            init_vlc(&run_vlc[i],
1959
                     RUN_VLC_BITS, 7,
1960
                     &run_len [i][0], 1, 1,
1961
                     &run_bits[i][0], 1, 1,
1962
                     INIT_VLC_USE_NEW_STATIC);
1963
        }
1964
        run7_vlc.table = run7_vlc_table,
1965
        run7_vlc.table_allocated = run7_vlc_table_size;
1966
        init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
1967
                 &run_len [6][0], 1, 1,
1968
                 &run_bits[6][0], 1, 1,
1969
                 INIT_VLC_USE_NEW_STATIC);
1970

    
1971
        init_cavlc_level_tab();
1972
    }
1973
}
1974

    
1975
static void free_tables(H264Context *h){
1976
    int i;
1977
    H264Context *hx;
1978
    av_freep(&h->intra4x4_pred_mode);
1979
    av_freep(&h->chroma_pred_mode_table);
1980
    av_freep(&h->cbp_table);
1981
    av_freep(&h->mvd_table[0]);
1982
    av_freep(&h->mvd_table[1]);
1983
    av_freep(&h->direct_table);
1984
    av_freep(&h->non_zero_count);
1985
    av_freep(&h->slice_table_base);
1986
    h->slice_table= NULL;
1987

    
1988
    av_freep(&h->mb2b_xy);
1989
    av_freep(&h->mb2b8_xy);
1990

    
1991
    for(i = 0; i < h->s.avctx->thread_count; i++) {
1992
        hx = h->thread_context[i];
1993
        if(!hx) continue;
1994
        av_freep(&hx->top_borders[1]);
1995
        av_freep(&hx->top_borders[0]);
1996
        av_freep(&hx->s.obmc_scratchpad);
1997
    }
1998
}
1999

    
2000
static void init_dequant8_coeff_table(H264Context *h){
2001
    int i,q,x;
2002
    const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
2003
    h->dequant8_coeff[0] = h->dequant8_buffer[0];
2004
    h->dequant8_coeff[1] = h->dequant8_buffer[1];
2005

    
2006
    for(i=0; i<2; i++ ){
2007
        if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
2008
            h->dequant8_coeff[1] = h->dequant8_buffer[0];
2009
            break;
2010
        }
2011

    
2012
        for(q=0; q<52; q++){
2013
            int shift = div6[q];
2014
            int idx = rem6[q];
2015
            for(x=0; x<64; x++)
2016
                h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
2017
                    ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
2018
                    h->pps.scaling_matrix8[i][x]) << shift;
2019
        }
2020
    }
2021
}
2022

    
2023
static void init_dequant4_coeff_table(H264Context *h){
2024
    int i,j,q,x;
2025
    const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
2026
    for(i=0; i<6; i++ ){
2027
        h->dequant4_coeff[i] = h->dequant4_buffer[i];
2028
        for(j=0; j<i; j++){
2029
            if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
2030
                h->dequant4_coeff[i] = h->dequant4_buffer[j];
2031
                break;
2032
            }
2033
        }
2034
        if(j<i)
2035
            continue;
2036

    
2037
        for(q=0; q<52; q++){
2038
            int shift = div6[q] + 2;
2039
            int idx = rem6[q];
2040
            for(x=0; x<16; x++)
2041
                h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
2042
                    ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
2043
                    h->pps.scaling_matrix4[i][x]) << shift;
2044
        }
2045
    }
2046
}
2047

    
2048
static void init_dequant_tables(H264Context *h){
2049
    int i,x;
2050
    init_dequant4_coeff_table(h);
2051
    if(h->pps.transform_8x8_mode)
2052
        init_dequant8_coeff_table(h);
2053
    if(h->sps.transform_bypass){
2054
        for(i=0; i<6; i++)
2055
            for(x=0; x<16; x++)
2056
                h->dequant4_coeff[i][0][x] = 1<<6;
2057
        if(h->pps.transform_8x8_mode)
2058
            for(i=0; i<2; i++)
2059
                for(x=0; x<64; x++)
2060
                    h->dequant8_coeff[i][0][x] = 1<<6;
2061
    }
2062
}
2063

    
2064

    
2065
/**
2066
 * allocates tables.
2067
 * needs width/height
2068
 */
2069
static int alloc_tables(H264Context *h){
2070
    MpegEncContext * const s = &h->s;
2071
    const int big_mb_num= s->mb_stride * (s->mb_height+1);
2072
    int x,y;
2073

    
2074
    CHECKED_ALLOCZ(h->intra4x4_pred_mode, big_mb_num * 8  * sizeof(uint8_t))
2075

    
2076
    CHECKED_ALLOCZ(h->non_zero_count    , big_mb_num * 16 * sizeof(uint8_t))
2077
    CHECKED_ALLOCZ(h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base))
2078
    CHECKED_ALLOCZ(h->cbp_table, big_mb_num * sizeof(uint16_t))
2079

    
2080
    CHECKED_ALLOCZ(h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t))
2081
    CHECKED_ALLOCZ(h->mvd_table[0], 32*big_mb_num * sizeof(uint16_t));
2082
    CHECKED_ALLOCZ(h->mvd_table[1], 32*big_mb_num * sizeof(uint16_t));
2083
    CHECKED_ALLOCZ(h->direct_table, 32*big_mb_num * sizeof(uint8_t));
2084

    
2085
    memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
2086
    h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
2087

    
2088
    CHECKED_ALLOCZ(h->mb2b_xy  , big_mb_num * sizeof(uint32_t));
2089
    CHECKED_ALLOCZ(h->mb2b8_xy , big_mb_num * sizeof(uint32_t));
2090
    for(y=0; y<s->mb_height; y++){
2091
        for(x=0; x<s->mb_width; x++){
2092
            const int mb_xy= x + y*s->mb_stride;
2093
            const int b_xy = 4*x + 4*y*h->b_stride;
2094
            const int b8_xy= 2*x + 2*y*h->b8_stride;
2095

    
2096
            h->mb2b_xy [mb_xy]= b_xy;
2097
            h->mb2b8_xy[mb_xy]= b8_xy;
2098
        }
2099
    }
2100

    
2101
    s->obmc_scratchpad = NULL;
2102

    
2103
    if(!h->dequant4_coeff[0])
2104
        init_dequant_tables(h);
2105

    
2106
    return 0;
2107
fail:
2108
    free_tables(h);
2109
    return -1;
2110
}
2111

    
2112
/**
2113
 * Mimic alloc_tables(), but for every context thread.
2114
 */
2115
static void clone_tables(H264Context *dst, H264Context *src){
2116
    dst->intra4x4_pred_mode       = src->intra4x4_pred_mode;
2117
    dst->non_zero_count           = src->non_zero_count;
2118
    dst->slice_table              = src->slice_table;
2119
    dst->cbp_table                = src->cbp_table;
2120
    dst->mb2b_xy                  = src->mb2b_xy;
2121
    dst->mb2b8_xy                 = src->mb2b8_xy;
2122
    dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
2123
    dst->mvd_table[0]             = src->mvd_table[0];
2124
    dst->mvd_table[1]             = src->mvd_table[1];
2125
    dst->direct_table             = src->direct_table;
2126

    
2127
    dst->s.obmc_scratchpad = NULL;
2128
    ff_h264_pred_init(&dst->hpc, src->s.codec_id);
2129
}
2130

    
2131
/**
2132
 * Init context
2133
 * Allocate buffers which are not shared amongst multiple threads.
2134
 */
2135
static int context_init(H264Context *h){
2136
    CHECKED_ALLOCZ(h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2137
    CHECKED_ALLOCZ(h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2138

    
2139
    return 0;
2140
fail:
2141
    return -1; // free_tables will clean up for us
2142
}
2143

    
2144
static av_cold void common_init(H264Context *h){
2145
    MpegEncContext * const s = &h->s;
2146

    
2147
    s->width = s->avctx->width;
2148
    s->height = s->avctx->height;
2149
    s->codec_id= s->avctx->codec->id;
2150

    
2151
    ff_h264_pred_init(&h->hpc, s->codec_id);
2152

    
2153
    h->dequant_coeff_pps= -1;
2154
    s->unrestricted_mv=1;
2155
    s->decode=1; //FIXME
2156

    
2157
    dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
2158

    
2159
    memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
2160
    memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
2161
}
2162

    
2163
static av_cold int decode_init(AVCodecContext *avctx){
2164
    H264Context *h= avctx->priv_data;
2165
    MpegEncContext * const s = &h->s;
2166

    
2167
    MPV_decode_defaults(s);
2168

    
2169
    s->avctx = avctx;
2170
    common_init(h);
2171

    
2172
    s->out_format = FMT_H264;
2173
    s->workaround_bugs= avctx->workaround_bugs;
2174

    
2175
    // set defaults
2176
//    s->decode_mb= ff_h263_decode_mb;
2177
    s->quarter_sample = 1;
2178
    s->low_delay= 1;
2179

    
2180
    if(avctx->codec_id == CODEC_ID_SVQ3)
2181
        avctx->pix_fmt= PIX_FMT_YUVJ420P;
2182
    else if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2183
        avctx->pix_fmt= PIX_FMT_VDPAU_H264;
2184
    else
2185
        avctx->pix_fmt= PIX_FMT_YUV420P;
2186

    
2187
    decode_init_vlc();
2188

    
2189
    if(avctx->extradata_size > 0 && avctx->extradata &&
2190
       *(char *)avctx->extradata == 1){
2191
        h->is_avc = 1;
2192
        h->got_avcC = 0;
2193
    } else {
2194
        h->is_avc = 0;
2195
    }
2196

    
2197
    h->thread_context[0] = h;
2198
    h->outputed_poc = INT_MIN;
2199
    h->prev_poc_msb= 1<<16;
2200
    h->sei_recovery_frame_cnt = -1;
2201
    h->sei_dpb_output_delay = 0;
2202
    h->sei_cpb_removal_delay = -1;
2203
    h->sei_buffering_period_present = 0;
2204
    return 0;
2205
}
2206

    
2207
static int frame_start(H264Context *h){
2208
    MpegEncContext * const s = &h->s;
2209
    int i;
2210

    
2211
    if(MPV_frame_start(s, s->avctx) < 0)
2212
        return -1;
2213
    ff_er_frame_start(s);
2214
    /*
2215
     * MPV_frame_start uses pict_type to derive key_frame.
2216
     * This is incorrect for H.264; IDR markings must be used.
2217
     * Zero here; IDR markings per slice in frame or fields are ORed in later.
2218
     * See decode_nal_units().
2219
     */
2220
    s->current_picture_ptr->key_frame= 0;
2221

    
2222
    assert(s->linesize && s->uvlinesize);
2223

    
2224
    for(i=0; i<16; i++){
2225
        h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
2226
        h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
2227
    }
2228
    for(i=0; i<4; i++){
2229
        h->block_offset[16+i]=
2230
        h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2231
        h->block_offset[24+16+i]=
2232
        h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2233
    }
2234

    
2235
    /* can't be in alloc_tables because linesize isn't known there.
2236
     * FIXME: redo bipred weight to not require extra buffer? */
2237
    for(i = 0; i < s->avctx->thread_count; i++)
2238
        if(!h->thread_context[i]->s.obmc_scratchpad)
2239
            h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
2240

    
2241
    /* some macroblocks will be accessed before they're available */
2242
    if(FRAME_MBAFF || s->avctx->thread_count > 1)
2243
        memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
2244

    
2245
//    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
2246

    
2247
    // We mark the current picture as non-reference after allocating it, so
2248
    // that if we break out due to an error it can be released automatically
2249
    // in the next MPV_frame_start().
2250
    // SVQ3 as well as most other codecs have only last/next/current and thus
2251
    // get released even with set reference, besides SVQ3 and others do not
2252
    // mark frames as reference later "naturally".
2253
    if(s->codec_id != CODEC_ID_SVQ3)
2254
        s->current_picture_ptr->reference= 0;
2255

    
2256
    s->current_picture_ptr->field_poc[0]=
2257
    s->current_picture_ptr->field_poc[1]= INT_MAX;
2258
    assert(s->current_picture_ptr->long_ref==0);
2259

    
2260
    return 0;
2261
}
2262

    
2263
static inline void backup_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int simple){
2264
    MpegEncContext * const s = &h->s;
2265
    int i;
2266
    int step    = 1;
2267
    int offset  = 1;
2268
    int uvoffset= 1;
2269
    int top_idx = 1;
2270
    int skiplast= 0;
2271

    
2272
    src_y  -=   linesize;
2273
    src_cb -= uvlinesize;
2274
    src_cr -= uvlinesize;
2275

    
2276
    if(!simple && FRAME_MBAFF){
2277
        if(s->mb_y&1){
2278
            offset  = MB_MBAFF ? 1 : 17;
2279
            uvoffset= MB_MBAFF ? 1 : 9;
2280
            if(!MB_MBAFF){
2281
                *(uint64_t*)(h->top_borders[0][s->mb_x]+ 0)= *(uint64_t*)(src_y +  15*linesize);
2282
                *(uint64_t*)(h->top_borders[0][s->mb_x]+ 8)= *(uint64_t*)(src_y +8+15*linesize);
2283
                if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2284
                    *(uint64_t*)(h->top_borders[0][s->mb_x]+16)= *(uint64_t*)(src_cb+7*uvlinesize);
2285
                    *(uint64_t*)(h->top_borders[0][s->mb_x]+24)= *(uint64_t*)(src_cr+7*uvlinesize);
2286
                }
2287
            }
2288
        }else{
2289
            if(!MB_MBAFF){
2290
                h->left_border[0]= h->top_borders[0][s->mb_x][15];
2291
                if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2292
                    h->left_border[34   ]= h->top_borders[0][s->mb_x][16+7  ];
2293
                    h->left_border[34+18]= h->top_borders[0][s->mb_x][16+8+7];
2294
                }
2295
                skiplast= 1;
2296
            }
2297
            offset  =
2298
            uvoffset=
2299
            top_idx = MB_MBAFF ? 0 : 1;
2300
        }
2301
        step= MB_MBAFF ? 2 : 1;
2302
    }
2303

    
2304
    // There are two lines saved, the line above the the top macroblock of a pair,
2305
    // and the line above the bottom macroblock
2306
    h->left_border[offset]= h->top_borders[top_idx][s->mb_x][15];
2307
    for(i=1; i<17 - skiplast; i++){
2308
        h->left_border[offset+i*step]= src_y[15+i*  linesize];
2309
    }
2310

    
2311
    *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0)= *(uint64_t*)(src_y +  16*linesize);
2312
    *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8)= *(uint64_t*)(src_y +8+16*linesize);
2313

    
2314
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2315
        h->left_border[uvoffset+34   ]= h->top_borders[top_idx][s->mb_x][16+7];
2316
        h->left_border[uvoffset+34+18]= h->top_borders[top_idx][s->mb_x][24+7];
2317
        for(i=1; i<9 - skiplast; i++){
2318
            h->left_border[uvoffset+34   +i*step]= src_cb[7+i*uvlinesize];
2319
            h->left_border[uvoffset+34+18+i*step]= src_cr[7+i*uvlinesize];
2320
        }
2321
        *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16)= *(uint64_t*)(src_cb+8*uvlinesize);
2322
        *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24)= *(uint64_t*)(src_cr+8*uvlinesize);
2323
    }
2324
}
2325

    
2326
static inline void xchg_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int xchg, int simple){
2327
    MpegEncContext * const s = &h->s;
2328
    int temp8, i;
2329
    uint64_t temp64;
2330
    int deblock_left;
2331
    int deblock_top;
2332
    int mb_xy;
2333
    int step    = 1;
2334
    int offset  = 1;
2335
    int uvoffset= 1;
2336
    int top_idx = 1;
2337

    
2338
    if(!simple && FRAME_MBAFF){
2339
        if(s->mb_y&1){
2340
            offset  = MB_MBAFF ? 1 : 17;
2341
            uvoffset= MB_MBAFF ? 1 : 9;
2342
        }else{
2343
            offset  =
2344
            uvoffset=
2345
            top_idx = MB_MBAFF ? 0 : 1;
2346
        }
2347
        step= MB_MBAFF ? 2 : 1;
2348
    }
2349

    
2350
    if(h->deblocking_filter == 2) {
2351
        mb_xy = h->mb_xy;
2352
        deblock_left = h->slice_table[mb_xy] == h->slice_table[mb_xy - 1];
2353
        deblock_top  = h->slice_table[mb_xy] == h->slice_table[h->top_mb_xy];
2354
    } else {
2355
        deblock_left = (s->mb_x > 0);
2356
        deblock_top =  (s->mb_y > !!MB_FIELD);
2357
    }
2358

    
2359
    src_y  -=   linesize + 1;
2360
    src_cb -= uvlinesize + 1;
2361
    src_cr -= uvlinesize + 1;
2362

    
2363
#define XCHG(a,b,t,xchg)\
2364
t= a;\
2365
if(xchg)\
2366
    a= b;\
2367
b= t;
2368

    
2369
    if(deblock_left){
2370
        for(i = !deblock_top; i<16; i++){
2371
            XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, xchg);
2372
        }
2373
        XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, 1);
2374
    }
2375

    
2376
    if(deblock_top){
2377
        XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0), *(uint64_t*)(src_y +1), temp64, xchg);
2378
        XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8), *(uint64_t*)(src_y +9), temp64, 1);
2379
        if(s->mb_x+1 < s->mb_width){
2380
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x+1]), *(uint64_t*)(src_y +17), temp64, 1);
2381
        }
2382
    }
2383

    
2384
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2385
        if(deblock_left){
2386
            for(i = !deblock_top; i<8; i++){
2387
                XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, xchg);
2388
                XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, xchg);
2389
            }
2390
            XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, 1);
2391
            XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, 1);
2392
        }
2393
        if(deblock_top){
2394
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16), *(uint64_t*)(src_cb+1), temp64, 1);
2395
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24), *(uint64_t*)(src_cr+1), temp64, 1);
2396
        }
2397
    }
2398
}
2399

    
2400
static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
2401
    MpegEncContext * const s = &h->s;
2402
    const int mb_x= s->mb_x;
2403
    const int mb_y= s->mb_y;
2404
    const int mb_xy= h->mb_xy;
2405
    const int mb_type= s->current_picture.mb_type[mb_xy];
2406
    uint8_t  *dest_y, *dest_cb, *dest_cr;
2407
    int linesize, uvlinesize /*dct_offset*/;
2408
    int i;
2409
    int *block_offset = &h->block_offset[0];
2410
    const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
2411
    /* is_h264 should always be true if SVQ3 is disabled. */
2412
    const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
2413
    void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
2414
    void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
2415

    
2416
    dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2417
    dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2418
    dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2419

    
2420
    s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
2421
    s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
2422

    
2423
    if (!simple && MB_FIELD) {
2424
        linesize   = h->mb_linesize   = s->linesize * 2;
2425
        uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2426
        block_offset = &h->block_offset[24];
2427
        if(mb_y&1){ //FIXME move out of this function?
2428
            dest_y -= s->linesize*15;
2429
            dest_cb-= s->uvlinesize*7;
2430
            dest_cr-= s->uvlinesize*7;
2431
        }
2432
        if(FRAME_MBAFF) {
2433
            int list;
2434
            for(list=0; list<h->list_count; list++){
2435
                if(!USES_LIST(mb_type, list))
2436
                    continue;
2437
                if(IS_16X16(mb_type)){
2438
                    int8_t *ref = &h->ref_cache[list][scan8[0]];
2439
                    fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
2440
                }else{
2441
                    for(i=0; i<16; i+=4){
2442
                        int ref = h->ref_cache[list][scan8[i]];
2443
                        if(ref >= 0)
2444
                            fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
2445
                    }
2446
                }
2447
            }
2448
        }
2449
    } else {
2450
        linesize   = h->mb_linesize   = s->linesize;
2451
        uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2452
//        dct_offset = s->linesize * 16;
2453
    }
2454

    
2455
    if (!simple && IS_INTRA_PCM(mb_type)) {
2456
        for (i=0; i<16; i++) {
2457
            memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
2458
        }
2459
        for (i=0; i<8; i++) {
2460
            memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
2461
            memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
2462
        }
2463
    } else {
2464
        if(IS_INTRA(mb_type)){
2465
            if(h->deblocking_filter)
2466
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
2467

    
2468
            if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2469
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
2470
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
2471
            }
2472

    
2473
            if(IS_INTRA4x4(mb_type)){
2474
                if(simple || !s->encoding){
2475
                    if(IS_8x8DCT(mb_type)){
2476
                        if(transform_bypass){
2477
                            idct_dc_add =
2478
                            idct_add    = s->dsp.add_pixels8;
2479
                        }else{
2480
                            idct_dc_add = s->dsp.h264_idct8_dc_add;
2481
                            idct_add    = s->dsp.h264_idct8_add;
2482
                        }
2483
                        for(i=0; i<16; i+=4){
2484
                            uint8_t * const ptr= dest_y + block_offset[i];
2485
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2486
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
2487
                                h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
2488
                            }else{
2489
                                const int nnz = h->non_zero_count_cache[ scan8[i] ];
2490
                                h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
2491
                                                            (h->topright_samples_available<<i)&0x4000, linesize);
2492
                                if(nnz){
2493
                                    if(nnz == 1 && h->mb[i*16])
2494
                                        idct_dc_add(ptr, h->mb + i*16, linesize);
2495
                                    else
2496
                                        idct_add   (ptr, h->mb + i*16, linesize);
2497
                                }
2498
                            }
2499
                        }
2500
                    }else{
2501
                        if(transform_bypass){
2502
                            idct_dc_add =
2503
                            idct_add    = s->dsp.add_pixels4;
2504
                        }else{
2505
                            idct_dc_add = s->dsp.h264_idct_dc_add;
2506
                            idct_add    = s->dsp.h264_idct_add;
2507
                        }
2508
                        for(i=0; i<16; i++){
2509
                            uint8_t * const ptr= dest_y + block_offset[i];
2510
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2511

    
2512
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
2513
                                h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
2514
                            }else{
2515
                                uint8_t *topright;
2516
                                int nnz, tr;
2517
                                if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
2518
                                    const int topright_avail= (h->topright_samples_available<<i)&0x8000;
2519
                                    assert(mb_y || linesize <= block_offset[i]);
2520
                                    if(!topright_avail){
2521
                                        tr= ptr[3 - linesize]*0x01010101;
2522
                                        topright= (uint8_t*) &tr;
2523
                                    }else
2524
                                        topright= ptr + 4 - linesize;
2525
                                }else
2526
                                    topright= NULL;
2527

    
2528
                                h->hpc.pred4x4[ dir ](ptr, topright, linesize);
2529
                                nnz = h->non_zero_count_cache[ scan8[i] ];
2530
                                if(nnz){
2531
                                    if(is_h264){
2532
                                        if(nnz == 1 && h->mb[i*16])
2533
                                            idct_dc_add(ptr, h->mb + i*16, linesize);
2534
                                        else
2535
                                            idct_add   (ptr, h->mb + i*16, linesize);
2536
                                    }else
2537
                                        svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
2538
                                }
2539
                            }
2540
                        }
2541
                    }
2542
                }
2543
            }else{
2544
                h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
2545
                if(is_h264){
2546
                    if(!transform_bypass)
2547
                        h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
2548
                }else
2549
                    svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
2550
            }
2551
            if(h->deblocking_filter)
2552
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
2553
        }else if(is_h264){
2554
            hl_motion(h, dest_y, dest_cb, dest_cr,
2555
                      s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2556
                      s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2557
                      s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
2558
        }
2559

    
2560

    
2561
        if(!IS_INTRA4x4(mb_type)){
2562
            if(is_h264){
2563
                if(IS_INTRA16x16(mb_type)){
2564
                    if(transform_bypass){
2565
                        if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
2566
                            h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
2567
                        }else{
2568
                            for(i=0; i<16; i++){
2569
                                if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
2570
                                    s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
2571
                            }
2572
                        }
2573
                    }else{
2574
                         s->dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2575
                    }
2576
                }else if(h->cbp&15){
2577
                    if(transform_bypass){
2578
                        const int di = IS_8x8DCT(mb_type) ? 4 : 1;
2579
                        idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
2580
                        for(i=0; i<16; i+=di){
2581
                            if(h->non_zero_count_cache[ scan8[i] ]){
2582
                                idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2583
                            }
2584
                        }
2585
                    }else{
2586
                        if(IS_8x8DCT(mb_type)){
2587
                            s->dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2588
                        }else{
2589
                            s->dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2590
                        }
2591
                    }
2592
                }
2593
            }else{
2594
                for(i=0; i<16; i++){
2595
                    if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
2596
                        uint8_t * const ptr= dest_y + block_offset[i];
2597
                        svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
2598
                    }
2599
                }
2600
            }
2601
        }
2602

    
2603
        if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
2604
            uint8_t *dest[2] = {dest_cb, dest_cr};
2605
            if(transform_bypass){
2606
                if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
2607
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
2608
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
2609
                }else{
2610
                    idct_add = s->dsp.add_pixels4;
2611
                    for(i=16; i<16+8; i++){
2612
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
2613
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2614
                    }
2615
                }
2616
            }else{
2617
                chroma_dc_dequant_idct_c(h->mb + 16*16, h->chroma_qp[0], h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
2618
                chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->chroma_qp[1], h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
2619
                if(is_h264){
2620
                    idct_add = s->dsp.h264_idct_add;
2621
                    idct_dc_add = s->dsp.h264_idct_dc_add;
2622
                    for(i=16; i<16+8; i++){
2623
                        if(h->non_zero_count_cache[ scan8[i] ])
2624
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2625
                        else if(h->mb[i*16])
2626
                            idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2627
                    }
2628
                }else{
2629
                    for(i=16; i<16+8; i++){
2630
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
2631
                            uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
2632
                            svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, chroma_qp[s->qscale + 12] - 12, 2);
2633
                        }
2634
                    }
2635
                }
2636
            }
2637
        }
2638
    }
2639
    if(h->cbp || IS_INTRA(mb_type))
2640
        s->dsp.clear_blocks(h->mb);
2641

    
2642
    if(h->deblocking_filter) {
2643
        backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, simple);
2644
        fill_caches(h, mb_type, 1); //FIXME don't fill stuff which isn't used by filter_mb
2645
        h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2646
        h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2647
        if (!simple && FRAME_MBAFF) {
2648
            filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2649
        } else {
2650
            filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2651
        }
2652
    }
2653
}
2654

    
2655
/**
2656
 * Process a macroblock; this case avoids checks for expensive uncommon cases.
2657
 */
2658
static void hl_decode_mb_simple(H264Context *h){
2659
    hl_decode_mb_internal(h, 1);
2660
}
2661

    
2662
/**
2663
 * Process a macroblock; this handles edge cases, such as interlacing.
2664
 */
2665
static void av_noinline hl_decode_mb_complex(H264Context *h){
2666
    hl_decode_mb_internal(h, 0);
2667
}
2668

    
2669
static void hl_decode_mb(H264Context *h){
2670
    MpegEncContext * const s = &h->s;
2671
    const int mb_xy= h->mb_xy;
2672
    const int mb_type= s->current_picture.mb_type[mb_xy];
2673
    int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
2674

    
2675
    if (is_complex)
2676
        hl_decode_mb_complex(h);
2677
    else hl_decode_mb_simple(h);
2678
}
2679

    
2680
static void pic_as_field(Picture *pic, const int parity){
2681
    int i;
2682
    for (i = 0; i < 4; ++i) {
2683
        if (parity == PICT_BOTTOM_FIELD)
2684
            pic->data[i] += pic->linesize[i];
2685
        pic->reference = parity;
2686
        pic->linesize[i] *= 2;
2687
    }
2688
    pic->poc= pic->field_poc[parity == PICT_BOTTOM_FIELD];
2689
}
2690

    
2691
static int split_field_copy(Picture *dest, Picture *src,
2692
                            int parity, int id_add){
2693
    int match = !!(src->reference & parity);
2694

    
2695
    if (match) {
2696
        *dest = *src;
2697
        if(parity != PICT_FRAME){
2698
            pic_as_field(dest, parity);
2699
            dest->pic_id *= 2;
2700
            dest->pic_id += id_add;
2701
        }
2702
    }
2703

    
2704
    return match;
2705
}
2706

    
2707
static int build_def_list(Picture *def, Picture **in, int len, int is_long, int sel){
2708
    int i[2]={0};
2709
    int index=0;
2710

    
2711
    while(i[0]<len || i[1]<len){
2712
        while(i[0]<len && !(in[ i[0] ] && (in[ i[0] ]->reference & sel)))
2713
            i[0]++;
2714
        while(i[1]<len && !(in[ i[1] ] && (in[ i[1] ]->reference & (sel^3))))
2715
            i[1]++;
2716
        if(i[0] < len){
2717
            in[ i[0] ]->pic_id= is_long ? i[0] : in[ i[0] ]->frame_num;
2718
            split_field_copy(&def[index++], in[ i[0]++ ], sel  , 1);
2719
        }
2720
        if(i[1] < len){
2721
            in[ i[1] ]->pic_id= is_long ? i[1] : in[ i[1] ]->frame_num;
2722
            split_field_copy(&def[index++], in[ i[1]++ ], sel^3, 0);
2723
        }
2724
    }
2725

    
2726
    return index;
2727
}
2728

    
2729
static int add_sorted(Picture **sorted, Picture **src, int len, int limit, int dir){
2730
    int i, best_poc;
2731
    int out_i= 0;
2732

    
2733
    for(;;){
2734
        best_poc= dir ? INT_MIN : INT_MAX;
2735

    
2736
        for(i=0; i<len; i++){
2737
            const int poc= src[i]->poc;
2738
            if(((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)){
2739
                best_poc= poc;
2740
                sorted[out_i]= src[i];
2741
            }
2742
        }
2743
        if(best_poc == (dir ? INT_MIN : INT_MAX))
2744
            break;
2745
        limit= sorted[out_i++]->poc - dir;
2746
    }
2747
    return out_i;
2748
}
2749

    
2750
/**
2751
 * fills the default_ref_list.
2752
 */
2753
static int fill_default_ref_list(H264Context *h){
2754
    MpegEncContext * const s = &h->s;
2755
    int i, len;
2756

    
2757
    if(h->slice_type_nos==FF_B_TYPE){
2758
        Picture *sorted[32];
2759
        int cur_poc, list;
2760
        int lens[2];
2761

    
2762
        if(FIELD_PICTURE)
2763
            cur_poc= s->current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
2764
        else
2765
            cur_poc= s->current_picture_ptr->poc;
2766

    
2767
        for(list= 0; list<2; list++){
2768
            len= add_sorted(sorted    , h->short_ref, h->short_ref_count, cur_poc, 1^list);
2769
            len+=add_sorted(sorted+len, h->short_ref, h->short_ref_count, cur_poc, 0^list);
2770
            assert(len<=32);
2771
            len= build_def_list(h->default_ref_list[list]    , sorted     , len, 0, s->picture_structure);
2772
            len+=build_def_list(h->default_ref_list[list]+len, h->long_ref, 16 , 1, s->picture_structure);
2773
            assert(len<=32);
2774

    
2775
            if(len < h->ref_count[list])
2776
                memset(&h->default_ref_list[list][len], 0, sizeof(Picture)*(h->ref_count[list] - len));
2777
            lens[list]= len;
2778
        }
2779

    
2780
        if(lens[0] == lens[1] && lens[1] > 1){
2781
            for(i=0; h->default_ref_list[0][i].data[0] == h->default_ref_list[1][i].data[0] && i<lens[0]; i++);
2782
            if(i == lens[0])
2783
                FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]);
2784
        }
2785
    }else{
2786
        len = build_def_list(h->default_ref_list[0]    , h->short_ref, h->short_ref_count, 0, s->picture_structure);
2787
        len+= build_def_list(h->default_ref_list[0]+len, h-> long_ref, 16                , 1, s->picture_structure);
2788
        assert(len <= 32);
2789
        if(len < h->ref_count[0])
2790
            memset(&h->default_ref_list[0][len], 0, sizeof(Picture)*(h->ref_count[0] - len));
2791
    }
2792
#ifdef TRACE
2793
    for (i=0; i<h->ref_count[0]; i++) {
2794
        tprintf(h->s.avctx, "List0: %s fn:%d 0x%p\n", (h->default_ref_list[0][i].long_ref ? "LT" : "ST"), h->default_ref_list[0][i].pic_id, h->default_ref_list[0][i].data[0]);
2795
    }
2796
    if(h->slice_type_nos==FF_B_TYPE){
2797
        for (i=0; i<h->ref_count[1]; i++) {
2798
            tprintf(h->s.avctx, "List1: %s fn:%d 0x%p\n", (h->default_ref_list[1][i].long_ref ? "LT" : "ST"), h->default_ref_list[1][i].pic_id, h->default_ref_list[1][i].data[0]);
2799
        }
2800
    }
2801
#endif
2802
    return 0;
2803
}
2804

    
2805
static void print_short_term(H264Context *h);
2806
static void print_long_term(H264Context *h);
2807

    
2808
/**
2809
 * Extract structure information about the picture described by pic_num in
2810
 * the current decoding context (frame or field). Note that pic_num is
2811
 * picture number without wrapping (so, 0<=pic_num<max_pic_num).
2812
 * @param pic_num picture number for which to extract structure information
2813
 * @param structure one of PICT_XXX describing structure of picture
2814
 *                      with pic_num
2815
 * @return frame number (short term) or long term index of picture
2816
 *         described by pic_num
2817
 */
2818
static int pic_num_extract(H264Context *h, int pic_num, int *structure){
2819
    MpegEncContext * const s = &h->s;
2820

    
2821
    *structure = s->picture_structure;
2822
    if(FIELD_PICTURE){
2823
        if (!(pic_num & 1))
2824
            /* opposite field */
2825
            *structure ^= PICT_FRAME;
2826
        pic_num >>= 1;
2827
    }
2828

    
2829
    return pic_num;
2830
}
2831

    
2832
static int decode_ref_pic_list_reordering(H264Context *h){
2833
    MpegEncContext * const s = &h->s;
2834
    int list, index, pic_structure;
2835

    
2836
    print_short_term(h);
2837
    print_long_term(h);
2838

    
2839
    for(list=0; list<h->list_count; list++){
2840
        memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]);
2841

    
2842
        if(get_bits1(&s->gb)){
2843
            int pred= h->curr_pic_num;
2844

    
2845
            for(index=0; ; index++){
2846
                unsigned int reordering_of_pic_nums_idc= get_ue_golomb_31(&s->gb);
2847
                unsigned int pic_id;
2848
                int i;
2849
                Picture *ref = NULL;
2850

    
2851
                if(reordering_of_pic_nums_idc==3)
2852
                    break;
2853

    
2854
                if(index >= h->ref_count[list]){
2855
                    av_log(h->s.avctx, AV_LOG_ERROR, "reference count overflow\n");
2856
                    return -1;
2857
                }
2858

    
2859
                if(reordering_of_pic_nums_idc<3){
2860
                    if(reordering_of_pic_nums_idc<2){
2861
                        const unsigned int abs_diff_pic_num= get_ue_golomb(&s->gb) + 1;
2862
                        int frame_num;
2863

    
2864
                        if(abs_diff_pic_num > h->max_pic_num){
2865
                            av_log(h->s.avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n");
2866
                            return -1;
2867
                        }
2868

    
2869
                        if(reordering_of_pic_nums_idc == 0) pred-= abs_diff_pic_num;
2870
                        else                                pred+= abs_diff_pic_num;
2871
                        pred &= h->max_pic_num - 1;
2872

    
2873
                        frame_num = pic_num_extract(h, pred, &pic_structure);
2874

    
2875
                        for(i= h->short_ref_count-1; i>=0; i--){
2876
                            ref = h->short_ref[i];
2877
                            assert(ref->reference);
2878
                            assert(!ref->long_ref);
2879
                            if(
2880
                                   ref->frame_num == frame_num &&
2881
                                   (ref->reference & pic_structure)
2882
                              )
2883
                                break;
2884
                        }
2885
                        if(i>=0)
2886
                            ref->pic_id= pred;
2887
                    }else{
2888
                        int long_idx;
2889
                        pic_id= get_ue_golomb(&s->gb); //long_term_pic_idx
2890

    
2891
                        long_idx= pic_num_extract(h, pic_id, &pic_structure);
2892

    
2893
                        if(long_idx>31){
2894
                            av_log(h->s.avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n");
2895
                            return -1;
2896
                        }
2897
                        ref = h->long_ref[long_idx];
2898
                        assert(!(ref && !ref->reference));
2899
                        if(ref && (ref->reference & pic_structure)){
2900
                            ref->pic_id= pic_id;
2901
                            assert(ref->long_ref);
2902
                            i=0;
2903
                        }else{
2904
                            i=-1;
2905
                        }
2906
                    }
2907

    
2908
                    if (i < 0) {
2909
                        av_log(h->s.avctx, AV_LOG_ERROR, "reference picture missing during reorder\n");
2910
                        memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME
2911
                    } else {
2912
                        for(i=index; i+1<h->ref_count[list]; i++){
2913
                            if(ref->long_ref == h->ref_list[list][i].long_ref && ref->pic_id == h->ref_list[list][i].pic_id)
2914
                                break;
2915
                        }
2916
                        for(; i > index; i--){
2917
                            h->ref_list[list][i]= h->ref_list[list][i-1];
2918
                        }
2919
                        h->ref_list[list][index]= *ref;
2920
                        if (FIELD_PICTURE){
2921
                            pic_as_field(&h->ref_list[list][index], pic_structure);
2922
                        }
2923
                    }
2924
                }else{
2925
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n");
2926
                    return -1;
2927
                }
2928
            }
2929
        }
2930
    }
2931
    for(list=0; list<h->list_count; list++){
2932
        for(index= 0; index < h->ref_count[list]; index++){
2933
            if(!h->ref_list[list][index].data[0]){
2934
                av_log(h->s.avctx, AV_LOG_ERROR, "Missing reference picture\n");
2935
                h->ref_list[list][index]= s->current_picture; //FIXME this is not a sensible solution
2936
            }
2937
        }
2938
    }
2939

    
2940
    return 0;
2941
}
2942

    
2943
static void fill_mbaff_ref_list(H264Context *h){
2944
    int list, i, j;
2945
    for(list=0; list<2; list++){ //FIXME try list_count
2946
        for(i=0; i<h->ref_count[list]; i++){
2947
            Picture *frame = &h->ref_list[list][i];
2948
            Picture *field = &h->ref_list[list][16+2*i];
2949
            field[0] = *frame;
2950
            for(j=0; j<3; j++)
2951
                field[0].linesize[j] <<= 1;
2952
            field[0].reference = PICT_TOP_FIELD;
2953
            field[0].poc= field[0].field_poc[0];
2954
            field[1] = field[0];
2955
            for(j=0; j<3; j++)
2956
                field[1].data[j] += frame->linesize[j];
2957
            field[1].reference = PICT_BOTTOM_FIELD;
2958
            field[1].poc= field[1].field_poc[1];
2959

    
2960
            h->luma_weight[list][16+2*i] = h->luma_weight[list][16+2*i+1] = h->luma_weight[list][i];
2961
            h->luma_offset[list][16+2*i] = h->luma_offset[list][16+2*i+1] = h->luma_offset[list][i];
2962
            for(j=0; j<2; j++){
2963
                h->chroma_weight[list][16+2*i][j] = h->chroma_weight[list][16+2*i+1][j] = h->chroma_weight[list][i][j];
2964
                h->chroma_offset[list][16+2*i][j] = h->chroma_offset[list][16+2*i+1][j] = h->chroma_offset[list][i][j];
2965
            }
2966
        }
2967
    }
2968
    for(j=0; j<h->ref_count[1]; j++){
2969
        for(i=0; i<h->ref_count[0]; i++)
2970
            h->implicit_weight[j][16+2*i] = h->implicit_weight[j][16+2*i+1] = h->implicit_weight[j][i];
2971
        memcpy(h->implicit_weight[16+2*j],   h->implicit_weight[j], sizeof(*h->implicit_weight));
2972
        memcpy(h->implicit_weight[16+2*j+1], h->implicit_weight[j], sizeof(*h->implicit_weight));
2973
    }
2974
}
2975

    
2976
static int pred_weight_table(H264Context *h){
2977
    MpegEncContext * const s = &h->s;
2978
    int list, i;
2979
    int luma_def, chroma_def;
2980

    
2981
    h->use_weight= 0;
2982
    h->use_weight_chroma= 0;
2983
    h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
2984
    h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
2985
    luma_def = 1<<h->luma_log2_weight_denom;
2986
    chroma_def = 1<<h->chroma_log2_weight_denom;
2987

    
2988
    for(list=0; list<2; list++){
2989
        h->luma_weight_flag[list]   = 0;
2990
        h->chroma_weight_flag[list] = 0;
2991
        for(i=0; i<h->ref_count[list]; i++){
2992
            int luma_weight_flag, chroma_weight_flag;
2993

    
2994
            luma_weight_flag= get_bits1(&s->gb);
2995
            if(luma_weight_flag){
2996
                h->luma_weight[list][i]= get_se_golomb(&s->gb);
2997
                h->luma_offset[list][i]= get_se_golomb(&s->gb);
2998
                if(   h->luma_weight[list][i] != luma_def
2999
                   || h->luma_offset[list][i] != 0) {
3000
                    h->use_weight= 1;
3001
                    h->luma_weight_flag[list]= 1;
3002
                }
3003
            }else{
3004
                h->luma_weight[list][i]= luma_def;
3005
                h->luma_offset[list][i]= 0;
3006
            }
3007

    
3008
            if(CHROMA){
3009
                chroma_weight_flag= get_bits1(&s->gb);
3010
                if(chroma_weight_flag){
3011
                    int j;
3012
                    for(j=0; j<2; j++){
3013
                        h->chroma_weight[list][i][j]= get_se_golomb(&s->gb);
3014
                        h->chroma_offset[list][i][j]= get_se_golomb(&s->gb);
3015
                        if(   h->chroma_weight[list][i][j] != chroma_def
3016
                           || h->chroma_offset[list][i][j] != 0) {
3017
                            h->use_weight_chroma= 1;
3018
                            h->chroma_weight_flag[list]= 1;
3019
                        }
3020
                    }
3021
                }else{
3022
                    int j;
3023
                    for(j=0; j<2; j++){
3024
                        h->chroma_weight[list][i][j]= chroma_def;
3025
                        h->chroma_offset[list][i][j]= 0;
3026
                    }
3027
                }
3028
            }
3029
        }
3030
        if(h->slice_type_nos != FF_B_TYPE) break;
3031
    }
3032
    h->use_weight= h->use_weight || h->use_weight_chroma;
3033
    return 0;
3034
}
3035

    
3036
static void implicit_weight_table(H264Context *h){
3037
    MpegEncContext * const s = &h->s;
3038
    int ref0, ref1, i;
3039
    int cur_poc = s->current_picture_ptr->poc;
3040

    
3041
    for (i = 0; i < 2; i++) {
3042
        h->luma_weight_flag[i]   = 0;
3043
        h->chroma_weight_flag[i] = 0;
3044
    }
3045

    
3046
    if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
3047
       && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
3048
        h->use_weight= 0;
3049
        h->use_weight_chroma= 0;
3050
        return;
3051
    }
3052

    
3053
    h->use_weight= 2;
3054
    h->use_weight_chroma= 2;
3055
    h->luma_log2_weight_denom= 5;
3056
    h->chroma_log2_weight_denom= 5;
3057

    
3058
    for(ref0=0; ref0 < h->ref_count[0]; ref0++){
3059
        int poc0 = h->ref_list[0][ref0].poc;
3060
        for(ref1=0; ref1 < h->ref_count[1]; ref1++){
3061
            int poc1 = h->ref_list[1][ref1].poc;
3062
            int td = av_clip(poc1 - poc0, -128, 127);
3063
            if(td){
3064
                int tb = av_clip(cur_poc - poc0, -128, 127);
3065
                int tx = (16384 + (FFABS(td) >> 1)) / td;
3066
                int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
3067
                if(dist_scale_factor < -64 || dist_scale_factor > 128)
3068
                    h->implicit_weight[ref0][ref1] = 32;
3069
                else
3070
                    h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
3071
            }else
3072
                h->implicit_weight[ref0][ref1] = 32;
3073
        }
3074
    }
3075
}
3076

    
3077
/**
3078
 * Mark a picture as no longer needed for reference. The refmask
3079
 * argument allows unreferencing of individual fields or the whole frame.
3080
 * If the picture becomes entirely unreferenced, but is being held for
3081
 * display purposes, it is marked as such.
3082
 * @param refmask mask of fields to unreference; the mask is bitwise
3083
 *                anded with the reference marking of pic
3084
 * @return non-zero if pic becomes entirely unreferenced (except possibly
3085
 *         for display purposes) zero if one of the fields remains in
3086
 *         reference
3087
 */
3088
static inline int unreference_pic(H264Context *h, Picture *pic, int refmask){
3089
    int i;
3090
    if (pic->reference &= refmask) {
3091
        return 0;
3092
    } else {
3093
        for(i = 0; h->delayed_pic[i]; i++)
3094
            if(pic == h->delayed_pic[i]){
3095
                pic->reference=DELAYED_PIC_REF;
3096
                break;
3097
            }
3098
        return 1;
3099
    }
3100
}
3101

    
3102
/**
3103
 * instantaneous decoder refresh.
3104
 */
3105
static void idr(H264Context *h){
3106
    int i;
3107

    
3108
    for(i=0; i<16; i++){
3109
        remove_long(h, i, 0);
3110
    }
3111
    assert(h->long_ref_count==0);
3112

    
3113
    for(i=0; i<h->short_ref_count; i++){
3114
        unreference_pic(h, h->short_ref[i], 0);
3115
        h->short_ref[i]= NULL;
3116
    }
3117
    h->short_ref_count=0;
3118
    h->prev_frame_num= 0;
3119
    h->prev_frame_num_offset= 0;
3120
    h->prev_poc_msb=
3121
    h->prev_poc_lsb= 0;
3122
}
3123

    
3124
/* forget old pics after a seek */
3125
static void flush_dpb(AVCodecContext *avctx){
3126
    H264Context *h= avctx->priv_data;
3127
    int i;
3128
    for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
3129
        if(h->delayed_pic[i])
3130
            h->delayed_pic[i]->reference= 0;
3131
        h->delayed_pic[i]= NULL;
3132
    }
3133
    h->outputed_poc= INT_MIN;
3134
    idr(h);
3135
    if(h->s.current_picture_ptr)
3136
        h->s.current_picture_ptr->reference= 0;
3137
    h->s.first_field= 0;
3138
    h->sei_recovery_frame_cnt = -1;
3139
    h->sei_dpb_output_delay = 0;
3140
    h->sei_cpb_removal_delay = -1;
3141
    h->sei_buffering_period_present = 0;
3142
    ff_mpeg_flush(avctx);
3143
}
3144

    
3145
/**
3146
 * Find a Picture in the short term reference list by frame number.
3147
 * @param frame_num frame number to search for
3148
 * @param idx the index into h->short_ref where returned picture is found
3149
 *            undefined if no picture found.
3150
 * @return pointer to the found picture, or NULL if no pic with the provided
3151
 *                 frame number is found
3152
 */
3153
static Picture * find_short(H264Context *h, int frame_num, int *idx){
3154
    MpegEncContext * const s = &h->s;
3155
    int i;
3156

    
3157
    for(i=0; i<h->short_ref_count; i++){
3158
        Picture *pic= h->short_ref[i];
3159
        if(s->avctx->debug&FF_DEBUG_MMCO)
3160
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
3161
        if(pic->frame_num == frame_num) {
3162
            *idx = i;
3163
            return pic;
3164
        }
3165
    }
3166
    return NULL;
3167
}
3168

    
3169
/**
3170
 * Remove a picture from the short term reference list by its index in
3171
 * that list.  This does no checking on the provided index; it is assumed
3172
 * to be valid. Other list entries are shifted down.
3173
 * @param i index into h->short_ref of picture to remove.
3174
 */
3175
static void remove_short_at_index(H264Context *h, int i){
3176
    assert(i >= 0 && i < h->short_ref_count);
3177
    h->short_ref[i]= NULL;
3178
    if (--h->short_ref_count)
3179
        memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i)*sizeof(Picture*));
3180
}
3181

    
3182
/**
3183
 *
3184
 * @return the removed picture or NULL if an error occurs
3185
 */
3186
static Picture * remove_short(H264Context *h, int frame_num, int ref_mask){
3187
    MpegEncContext * const s = &h->s;
3188
    Picture *pic;
3189
    int i;
3190

    
3191
    if(s->avctx->debug&FF_DEBUG_MMCO)
3192
        av_log(h->s.avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);
3193

    
3194
    pic = find_short(h, frame_num, &i);
3195
    if (pic){
3196
        if(unreference_pic(h, pic, ref_mask))
3197
        remove_short_at_index(h, i);
3198
    }
3199

    
3200
    return pic;
3201
}
3202

    
3203
/**
3204
 * Remove a picture from the long term reference list by its index in
3205
 * that list.
3206
 * @return the removed picture or NULL if an error occurs
3207
 */
3208
static Picture * remove_long(H264Context *h, int i, int ref_mask){
3209
    Picture *pic;
3210

    
3211
    pic= h->long_ref[i];
3212
    if (pic){
3213
        if(unreference_pic(h, pic, ref_mask)){
3214
            assert(h->long_ref[i]->long_ref == 1);
3215
            h->long_ref[i]->long_ref= 0;
3216
            h->long_ref[i]= NULL;
3217
            h->long_ref_count--;
3218
        }
3219
    }
3220

    
3221
    return pic;
3222
}
3223

    
3224
/**
3225
 * print short term list
3226
 */
3227
static void print_short_term(H264Context *h) {
3228
    uint32_t i;
3229
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3230
        av_log(h->s.avctx, AV_LOG_DEBUG, "short term list:\n");
3231
        for(i=0; i<h->short_ref_count; i++){
3232
            Picture *pic= h->short_ref[i];
3233
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3234
        }
3235
    }
3236
}
3237

    
3238
/**
3239
 * print long term list
3240
 */
3241
static void print_long_term(H264Context *h) {
3242
    uint32_t i;
3243
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3244
        av_log(h->s.avctx, AV_LOG_DEBUG, "long term list:\n");
3245
        for(i = 0; i < 16; i++){
3246
            Picture *pic= h->long_ref[i];
3247
            if (pic) {
3248
                av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3249
            }
3250
        }
3251
    }
3252
}
3253

    
3254
/**
3255
 * Executes the reference picture marking (memory management control operations).
3256
 */
3257
static int execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
3258
    MpegEncContext * const s = &h->s;
3259
    int i, j;
3260
    int current_ref_assigned=0;
3261
    Picture *pic;
3262

    
3263
    if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0)
3264
        av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n");
3265

    
3266
    for(i=0; i<mmco_count; i++){
3267
        int structure, frame_num;
3268
        if(s->avctx->debug&FF_DEBUG_MMCO)
3269
            av_log(h->s.avctx, AV_LOG_DEBUG, "mmco:%d %d %d\n", h->mmco[i].opcode, h->mmco[i].short_pic_num, h->mmco[i].long_arg);
3270

    
3271
        if(   mmco[i].opcode == MMCO_SHORT2UNUSED
3272
           || mmco[i].opcode == MMCO_SHORT2LONG){
3273
            frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure);
3274
            pic = find_short(h, frame_num, &j);
3275
            if(!pic){
3276
                if(mmco[i].opcode != MMCO_SHORT2LONG || !h->long_ref[mmco[i].long_arg]
3277
                   || h->long_ref[mmco[i].long_arg]->frame_num != frame_num)
3278
                av_log(h->s.avctx, AV_LOG_ERROR, "mmco: unref short failure\n");
3279
                continue;
3280
            }
3281
        }
3282

    
3283
        switch(mmco[i].opcode){
3284
        case MMCO_SHORT2UNUSED:
3285
            if(s->avctx->debug&FF_DEBUG_MMCO)
3286
                av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref short %d count %d\n", h->mmco[i].short_pic_num, h->short_ref_count);
3287
            remove_short(h, frame_num, structure ^ PICT_FRAME);
3288
            break;
3289
        case MMCO_SHORT2LONG:
3290
                if (h->long_ref[mmco[i].long_arg] != pic)
3291
                    remove_long(h, mmco[i].long_arg, 0);
3292

    
3293
                remove_short_at_index(h, j);
3294
                h->long_ref[ mmco[i].long_arg ]= pic;
3295
                if (h->long_ref[ mmco[i].long_arg ]){
3296
                    h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3297
                    h->long_ref_count++;
3298
                }
3299
            break;
3300
        case MMCO_LONG2UNUSED:
3301
            j = pic_num_extract(h, mmco[i].long_arg, &structure);
3302
            pic = h->long_ref[j];
3303
            if (pic) {
3304
                remove_long(h, j, structure ^ PICT_FRAME);
3305
            } else if(s->avctx->debug&FF_DEBUG_MMCO)
3306
                av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
3307
            break;
3308
        case MMCO_LONG:
3309
                    // Comment below left from previous code as it is an interresting note.
3310
                    /* First field in pair is in short term list or
3311
                     * at a different long term index.
3312
                     * This is not allowed; see 7.4.3.3, notes 2 and 3.
3313
                     * Report the problem and keep the pair where it is,
3314
                     * and mark this field valid.
3315
                     */
3316

    
3317
            if (h->long_ref[mmco[i].long_arg] != s->current_picture_ptr) {
3318
                remove_long(h, mmco[i].long_arg, 0);
3319

    
3320
                h->long_ref[ mmco[i].long_arg ]= s->current_picture_ptr;
3321
                h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3322
                h->long_ref_count++;
3323
            }
3324

    
3325
            s->current_picture_ptr->reference |= s->picture_structure;
3326
            current_ref_assigned=1;
3327
            break;
3328
        case MMCO_SET_MAX_LONG:
3329
            assert(mmco[i].long_arg <= 16);
3330
            // just remove the long term which index is greater than new max
3331
            for(j = mmco[i].long_arg; j<16; j++){
3332
                remove_long(h, j, 0);
3333
            }
3334
            break;
3335
        case MMCO_RESET:
3336
            while(h->short_ref_count){
3337
                remove_short(h, h->short_ref[0]->frame_num, 0);
3338
            }
3339
            for(j = 0; j < 16; j++) {
3340
                remove_long(h, j, 0);
3341
            }
3342
            s->current_picture_ptr->poc=
3343
            s->current_picture_ptr->field_poc[0]=
3344
            s->current_picture_ptr->field_poc[1]=
3345
            h->poc_lsb=
3346
            h->poc_msb=
3347
            h->frame_num=
3348
            s->current_picture_ptr->frame_num= 0;
3349
            break;
3350
        default: assert(0);
3351
        }
3352
    }
3353

    
3354
    if (!current_ref_assigned) {
3355
        /* Second field of complementary field pair; the first field of
3356
         * which is already referenced. If short referenced, it
3357
         * should be first entry in short_ref. If not, it must exist
3358
         * in long_ref; trying to put it on the short list here is an
3359
         * error in the encoded bit stream (ref: 7.4.3.3, NOTE 2 and 3).
3360
         */
3361
        if (h->short_ref_count && h->short_ref[0] == s->current_picture_ptr) {
3362
            /* Just mark the second field valid */
3363
            s->current_picture_ptr->reference = PICT_FRAME;
3364
        } else if (s->current_picture_ptr->long_ref) {
3365
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term reference "
3366
                                             "assignment for second field "
3367
                                             "in complementary field pair "
3368
                                             "(first field is long term)\n");
3369
        } else {
3370
            pic= remove_short(h, s->current_picture_ptr->frame_num, 0);
3371
            if(pic){
3372
                av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
3373
            }
3374

    
3375
            if(h->short_ref_count)
3376
                memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
3377

    
3378
            h->short_ref[0]= s->current_picture_ptr;
3379
            h->short_ref_count++;
3380
            s->current_picture_ptr->reference |= s->picture_structure;
3381
        }
3382
    }
3383

    
3384
    if (h->long_ref_count + h->short_ref_count > h->sps.ref_frame_count){
3385

    
3386
        /* We have too many reference frames, probably due to corrupted
3387
         * stream. Need to discard one frame. Prevents overrun of the
3388
         * short_ref and long_ref buffers.
3389
         */
3390
        av_log(h->s.avctx, AV_LOG_ERROR,
3391
               "number of reference frames exceeds max (probably "
3392
               "corrupt input), discarding one\n");
3393

    
3394
        if (h->long_ref_count && !h->short_ref_count) {
3395
            for (i = 0; i < 16; ++i)
3396
                if (h->long_ref[i])
3397
                    break;
3398

    
3399
            assert(i < 16);
3400
            remove_long(h, i, 0);
3401
        } else {
3402
            pic = h->short_ref[h->short_ref_count - 1];
3403
            remove_short(h, pic->frame_num, 0);
3404
        }
3405
    }
3406

    
3407
    print_short_term(h);
3408
    print_long_term(h);
3409
    return 0;
3410
}
3411

    
3412
static int decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
3413
    MpegEncContext * const s = &h->s;
3414
    int i;
3415

    
3416
    h->mmco_index= 0;
3417
    if(h->nal_unit_type == NAL_IDR_SLICE){ //FIXME fields
3418
        s->broken_link= get_bits1(gb) -1;
3419
        if(get_bits1(gb)){
3420
            h->mmco[0].opcode= MMCO_LONG;
3421
            h->mmco[0].long_arg= 0;
3422
            h->mmco_index= 1;
3423
        }
3424
    }else{
3425
        if(get_bits1(gb)){ // adaptive_ref_pic_marking_mode_flag
3426
            for(i= 0; i<MAX_MMCO_COUNT; i++) {
3427
                MMCOOpcode opcode= get_ue_golomb_31(gb);
3428

    
3429
                h->mmco[i].opcode= opcode;
3430
                if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){
3431
                    h->mmco[i].short_pic_num= (h->curr_pic_num - get_ue_golomb(gb) - 1) & (h->max_pic_num - 1);
3432
/*                    if(h->mmco[i].short_pic_num >= h->short_ref_count || h->short_ref[ h->mmco[i].short_pic_num ] == NULL){
3433
                        av_log(s->avctx, AV_LOG_ERROR, "illegal short ref in memory management control operation %d\n", mmco);
3434
                        return -1;
3435
                    }*/
3436
                }
3437
                if(opcode==MMCO_SHORT2LONG || opcode==MMCO_LONG2UNUSED || opcode==MMCO_LONG || opcode==MMCO_SET_MAX_LONG){
3438
                    unsigned int long_arg= get_ue_golomb_31(gb);
3439
                    if(long_arg >= 32 || (long_arg >= 16 && !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE))){
3440
                        av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode);
3441
                        return -1;
3442
                    }
3443
                    h->mmco[i].long_arg= long_arg;
3444
                }
3445

    
3446
                if(opcode > (unsigned)MMCO_LONG){
3447
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode);
3448
                    return -1;
3449
                }
3450
                if(opcode == MMCO_END)
3451
                    break;
3452
            }
3453
            h->mmco_index= i;
3454
        }else{
3455
            assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
3456

    
3457
            if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
3458
                    !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
3459
                h->mmco[0].opcode= MMCO_SHORT2UNUSED;
3460
                h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
3461
                h->mmco_index= 1;
3462
                if (FIELD_PICTURE) {
3463
                    h->mmco[0].short_pic_num *= 2;
3464
                    h->mmco[1].opcode= MMCO_SHORT2UNUSED;
3465
                    h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
3466
                    h->mmco_index= 2;
3467
                }
3468
            }
3469
        }
3470
    }
3471

    
3472
    return 0;
3473
}
3474

    
3475
static int init_poc(H264Context *h){
3476
    MpegEncContext * const s = &h->s;
3477
    const int max_frame_num= 1<<h->sps.log2_max_frame_num;
3478
    int field_poc[2];
3479
    Picture *cur = s->current_picture_ptr;
3480

    
3481
    h->frame_num_offset= h->prev_frame_num_offset;
3482
    if(h->frame_num < h->prev_frame_num)
3483
        h->frame_num_offset += max_frame_num;
3484

    
3485
    if(h->sps.poc_type==0){
3486
        const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
3487

    
3488
        if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
3489
            h->poc_msb = h->prev_poc_msb + max_poc_lsb;
3490
        else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
3491
            h->poc_msb = h->prev_poc_msb - max_poc_lsb;
3492
        else
3493
            h->poc_msb = h->prev_poc_msb;
3494
//printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
3495
        field_poc[0] =
3496
        field_poc[1] = h->poc_msb + h->poc_lsb;
3497
        if(s->picture_structure == PICT_FRAME)
3498
            field_poc[1] += h->delta_poc_bottom;
3499
    }else if(h->sps.poc_type==1){
3500
        int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
3501
        int i;
3502

    
3503
        if(h->sps.poc_cycle_length != 0)
3504
            abs_frame_num = h->frame_num_offset + h->frame_num;
3505
        else
3506
            abs_frame_num = 0;
3507

    
3508
        if(h->nal_ref_idc==0 && abs_frame_num > 0)
3509
            abs_frame_num--;
3510

    
3511
        expected_delta_per_poc_cycle = 0;
3512
        for(i=0; i < h->sps.poc_cycle_length; i++)
3513
            expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
3514

    
3515
        if(abs_frame_num > 0){
3516
            int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
3517
            int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
3518

    
3519
            expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
3520
            for(i = 0; i <= frame_num_in_poc_cycle; i++)
3521
                expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
3522
        } else
3523
            expectedpoc = 0;
3524

    
3525
        if(h->nal_ref_idc == 0)
3526
            expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
3527

    
3528
        field_poc[0] = expectedpoc + h->delta_poc[0];
3529
        field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
3530

    
3531
        if(s->picture_structure == PICT_FRAME)
3532
            field_poc[1] += h->delta_poc[1];
3533
    }else{
3534
        int poc= 2*(h->frame_num_offset + h->frame_num);
3535

    
3536
        if(!h->nal_ref_idc)
3537
            poc--;
3538

    
3539
        field_poc[0]= poc;
3540
        field_poc[1]= poc;
3541
    }
3542

    
3543
    if(s->picture_structure != PICT_BOTTOM_FIELD)
3544
        s->current_picture_ptr->field_poc[0]= field_poc[0];
3545
    if(s->picture_structure != PICT_TOP_FIELD)
3546
        s->current_picture_ptr->field_poc[1]= field_poc[1];
3547
    cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
3548

    
3549
    return 0;
3550
}
3551

    
3552

    
3553
/**
3554
 * initialize scan tables
3555
 */
3556
static void init_scan_tables(H264Context *h){
3557
    MpegEncContext * const s = &h->s;
3558
    int i;
3559
    if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
3560
        memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
3561
        memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
3562
    }else{
3563
        for(i=0; i<16; i++){
3564
#define T(x) (x>>2) | ((x<<2) & 0xF)
3565
            h->zigzag_scan[i] = T(zigzag_scan[i]);
3566
            h-> field_scan[i] = T( field_scan[i]);
3567
#undef T
3568
        }
3569
    }
3570
    if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
3571
        memcpy(h->zigzag_scan8x8,       ff_zigzag_direct,     64*sizeof(uint8_t));
3572
        memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
3573
        memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
3574
        memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
3575
    }else{
3576
        for(i=0; i<64; i++){
3577
#define T(x) (x>>3) | ((x&7)<<3)
3578
            h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
3579
            h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
3580
            h->field_scan8x8[i]        = T(field_scan8x8[i]);
3581
            h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
3582
#undef T
3583
        }
3584
    }
3585
    if(h->sps.transform_bypass){ //FIXME same ugly
3586
        h->zigzag_scan_q0          = zigzag_scan;
3587
        h->zigzag_scan8x8_q0       = ff_zigzag_direct;
3588
        h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
3589
        h->field_scan_q0           = field_scan;
3590
        h->field_scan8x8_q0        = field_scan8x8;
3591
        h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
3592
    }else{
3593
        h->zigzag_scan_q0          = h->zigzag_scan;
3594
        h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
3595
        h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
3596
        h->field_scan_q0           = h->field_scan;
3597
        h->field_scan8x8_q0        = h->field_scan8x8;
3598
        h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
3599
    }
3600
}
3601

    
3602
/**
3603
 * Replicates H264 "master" context to thread contexts.
3604
 */
3605
static void clone_slice(H264Context *dst, H264Context *src)
3606
{
3607
    memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
3608
    dst->s.current_picture_ptr  = src->s.current_picture_ptr;
3609
    dst->s.current_picture      = src->s.current_picture;
3610
    dst->s.linesize             = src->s.linesize;
3611
    dst->s.uvlinesize           = src->s.uvlinesize;
3612
    dst->s.first_field          = src->s.first_field;
3613

    
3614
    dst->prev_poc_msb           = src->prev_poc_msb;
3615
    dst->prev_poc_lsb           = src->prev_poc_lsb;
3616
    dst->prev_frame_num_offset  = src->prev_frame_num_offset;
3617
    dst->prev_frame_num         = src->prev_frame_num;
3618
    dst->short_ref_count        = src->short_ref_count;
3619

    
3620
    memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
3621
    memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
3622
    memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
3623
    memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
3624

    
3625
    memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
3626
    memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
3627
}
3628

    
3629
/**
3630
 * decodes a slice header.
3631
 * This will also call MPV_common_init() and frame_start() as needed.
3632
 *
3633
 * @param h h264context
3634
 * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
3635
 *
3636
 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
3637
 */
3638
static int decode_slice_header(H264Context *h, H264Context *h0){
3639
    MpegEncContext * const s = &h->s;
3640
    MpegEncContext * const s0 = &h0->s;
3641
    unsigned int first_mb_in_slice;
3642
    unsigned int pps_id;
3643
    int num_ref_idx_active_override_flag;
3644
    unsigned int slice_type, tmp, i, j;
3645
    int default_ref_list_done = 0;
3646
    int last_pic_structure;
3647

    
3648
    s->dropable= h->nal_ref_idc == 0;
3649

    
3650
    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
3651
        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
3652
        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
3653
    }else{
3654
        s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
3655
        s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
3656
    }
3657

    
3658
    first_mb_in_slice= get_ue_golomb(&s->gb);
3659

    
3660
    if((s->flags2 & CODEC_FLAG2_CHUNKS) && first_mb_in_slice == 0){
3661
        h0->current_slice = 0;
3662
        if (!s0->first_field)
3663
            s->current_picture_ptr= NULL;
3664
    }
3665

    
3666
    slice_type= get_ue_golomb_31(&s->gb);
3667
    if(slice_type > 9){
3668
        av_log(h->s.avctx, AV_LOG_ERROR, "slice type too large (%d) at %d %d\n", h->slice_type, s->mb_x, s->mb_y);
3669
        return -1;
3670
    }
3671
    if(slice_type > 4){
3672
        slice_type -= 5;
3673
        h->slice_type_fixed=1;
3674
    }else
3675
        h->slice_type_fixed=0;
3676

    
3677
    slice_type= golomb_to_pict_type[ slice_type ];
3678
    if (slice_type == FF_I_TYPE
3679
        || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
3680
        default_ref_list_done = 1;
3681
    }
3682
    h->slice_type= slice_type;
3683
    h->slice_type_nos= slice_type & 3;
3684

    
3685
    s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
3686
    if (s->pict_type == FF_B_TYPE && s0->last_picture_ptr == NULL) {
3687
        av_log(h->s.avctx, AV_LOG_ERROR,
3688
               "B picture before any references, skipping\n");
3689
        return -1;
3690
    }
3691

    
3692
    pps_id= get_ue_golomb(&s->gb);
3693
    if(pps_id>=MAX_PPS_COUNT){
3694
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
3695
        return -1;
3696
    }
3697
    if(!h0->pps_buffers[pps_id]) {
3698
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS referenced\n");
3699
        return -1;
3700
    }
3701
    h->pps= *h0->pps_buffers[pps_id];
3702

    
3703
    if(!h0->sps_buffers[h->pps.sps_id]) {
3704
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS referenced\n");
3705
        return -1;
3706
    }
3707
    h->sps = *h0->sps_buffers[h->pps.sps_id];
3708

    
3709
    if(h == h0 && h->dequant_coeff_pps != pps_id){
3710
        h->dequant_coeff_pps = pps_id;
3711
        init_dequant_tables(h);
3712
    }
3713

    
3714
    s->mb_width= h->sps.mb_width;
3715
    s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
3716

    
3717
    h->b_stride=  s->mb_width*4;
3718
    h->b8_stride= s->mb_width*2;
3719

    
3720
    s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
3721
    if(h->sps.frame_mbs_only_flag)
3722
        s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
3723
    else
3724
        s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
3725

    
3726
    if (s->context_initialized
3727
        && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
3728
        if(h != h0)
3729
            return -1;   // width / height changed during parallelized decoding
3730
        free_tables(h);
3731
        flush_dpb(s->avctx);
3732
        MPV_common_end(s);
3733
    }
3734
    if (!s->context_initialized) {
3735
        if(h != h0)
3736
            return -1;  // we cant (re-)initialize context during parallel decoding
3737
        if (MPV_common_init(s) < 0)
3738
            return -1;
3739
        s->first_field = 0;
3740

    
3741
        init_scan_tables(h);
3742
        alloc_tables(h);
3743

    
3744
        for(i = 1; i < s->avctx->thread_count; i++) {
3745
            H264Context *c;
3746
            c = h->thread_context[i] = av_malloc(sizeof(H264Context));
3747
            memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
3748
            memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
3749
            c->sps = h->sps;
3750
            c->pps = h->pps;
3751
            init_scan_tables(c);
3752
            clone_tables(c, h);
3753
        }
3754

    
3755
        for(i = 0; i < s->avctx->thread_count; i++)
3756
            if(context_init(h->thread_context[i]) < 0)
3757
                return -1;
3758

    
3759
        s->avctx->width = s->width;
3760
        s->avctx->height = s->height;
3761
        s->avctx->sample_aspect_ratio= h->sps.sar;
3762
        if(!s->avctx->sample_aspect_ratio.den)
3763
            s->avctx->sample_aspect_ratio.den = 1;
3764

    
3765
        if(h->sps.timing_info_present_flag){
3766
            s->avctx->time_base= (AVRational){h->sps.num_units_in_tick * 2, h->sps.time_scale};
3767
            if(h->x264_build > 0 && h->x264_build < 44)
3768
                s->avctx->time_base.den *= 2;
3769
            av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
3770
                      s->avctx->time_base.num, s->avctx->time_base.den, 1<<30);
3771
        }
3772
    }
3773

    
3774
    h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
3775

    
3776
    h->mb_mbaff = 0;
3777
    h->mb_aff_frame = 0;
3778
    last_pic_structure = s0->picture_structure;
3779
    if(h->sps.frame_mbs_only_flag){
3780
        s->picture_structure= PICT_FRAME;
3781
    }else{
3782
        if(get_bits1(&s->gb)) { //field_pic_flag
3783
            s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
3784
        } else {
3785
            s->picture_structure= PICT_FRAME;
3786
            h->mb_aff_frame = h->sps.mb_aff;
3787
        }
3788
    }
3789
    h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
3790

    
3791
    if(h0->current_slice == 0){
3792
        while(h->frame_num !=  h->prev_frame_num &&
3793
              h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
3794
            av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
3795
            frame_start(h);
3796
            h->prev_frame_num++;
3797
            h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
3798
            s->current_picture_ptr->frame_num= h->prev_frame_num;
3799
            execute_ref_pic_marking(h, NULL, 0);
3800
        }
3801

    
3802
        /* See if we have a decoded first field looking for a pair... */
3803
        if (s0->first_field) {
3804
            assert(s0->current_picture_ptr);
3805
            assert(s0->current_picture_ptr->data[0]);
3806
            assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
3807

    
3808
            /* figure out if we have a complementary field pair */
3809
            if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
3810
                /*
3811
                 * Previous field is unmatched. Don't display it, but let it
3812
                 * remain for reference if marked as such.
3813
                 */
3814
                s0->current_picture_ptr = NULL;
3815
                s0->first_field = FIELD_PICTURE;
3816

    
3817
            } else {
3818
                if (h->nal_ref_idc &&
3819
                        s0->current_picture_ptr->reference &&
3820
                        s0->current_picture_ptr->frame_num != h->frame_num) {
3821
                    /*
3822
                     * This and previous field were reference, but had
3823
                     * different frame_nums. Consider this field first in
3824
                     * pair. Throw away previous field except for reference
3825
                     * purposes.
3826
                     */
3827
                    s0->first_field = 1;
3828
                    s0->current_picture_ptr = NULL;
3829

    
3830
                } else {
3831
                    /* Second field in complementary pair */
3832
                    s0->first_field = 0;
3833
                }
3834
            }
3835

    
3836
        } else {
3837
            /* Frame or first field in a potentially complementary pair */
3838
            assert(!s0->current_picture_ptr);
3839
            s0->first_field = FIELD_PICTURE;
3840
        }
3841

    
3842
        if((!FIELD_PICTURE || s0->first_field) && frame_start(h) < 0) {
3843
            s0->first_field = 0;
3844
            return -1;
3845
        }
3846
    }
3847
    if(h != h0)
3848
        clone_slice(h, h0);
3849

    
3850
    s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
3851

    
3852
    assert(s->mb_num == s->mb_width * s->mb_height);
3853
    if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
3854
       first_mb_in_slice                    >= s->mb_num){
3855
        av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
3856
        return -1;
3857
    }
3858
    s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
3859
    s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
3860
    if (s->picture_structure == PICT_BOTTOM_FIELD)
3861
        s->resync_mb_y = s->mb_y = s->mb_y + 1;
3862
    assert(s->mb_y < s->mb_height);
3863

    
3864
    if(s->picture_structure==PICT_FRAME){
3865
        h->curr_pic_num=   h->frame_num;
3866
        h->max_pic_num= 1<< h->sps.log2_max_frame_num;
3867
    }else{
3868
        h->curr_pic_num= 2*h->frame_num + 1;
3869
        h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
3870
    }
3871

    
3872
    if(h->nal_unit_type == NAL_IDR_SLICE){
3873
        get_ue_golomb(&s->gb); /* idr_pic_id */
3874
    }
3875

    
3876
    if(h->sps.poc_type==0){
3877
        h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
3878

    
3879
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
3880
            h->delta_poc_bottom= get_se_golomb(&s->gb);
3881
        }
3882
    }
3883

    
3884
    if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
3885
        h->delta_poc[0]= get_se_golomb(&s->gb);
3886

    
3887
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
3888
            h->delta_poc[1]= get_se_golomb(&s->gb);
3889
    }
3890

    
3891
    init_poc(h);
3892

    
3893
    if(h->pps.redundant_pic_cnt_present){
3894
        h->redundant_pic_count= get_ue_golomb(&s->gb);
3895
    }
3896

    
3897
    //set defaults, might be overridden a few lines later
3898
    h->ref_count[0]= h->pps.ref_count[0];
3899
    h->ref_count[1]= h->pps.ref_count[1];
3900

    
3901
    if(h->slice_type_nos != FF_I_TYPE){
3902
        if(h->slice_type_nos == FF_B_TYPE){
3903
            h->direct_spatial_mv_pred= get_bits1(&s->gb);
3904
        }
3905
        num_ref_idx_active_override_flag= get_bits1(&s->gb);
3906

    
3907
        if(num_ref_idx_active_override_flag){
3908
            h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
3909
            if(h->slice_type_nos==FF_B_TYPE)
3910
                h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
3911

    
3912
            if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
3913
                av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
3914
                h->ref_count[0]= h->ref_count[1]= 1;
3915
                return -1;
3916
            }
3917
        }
3918
        if(h->slice_type_nos == FF_B_TYPE)
3919
            h->list_count= 2;
3920
        else
3921
            h->list_count= 1;
3922
    }else
3923
        h->list_count= 0;
3924

    
3925
    if(!default_ref_list_done){
3926
        fill_default_ref_list(h);
3927
    }
3928

    
3929
    if(h->slice_type_nos!=FF_I_TYPE && decode_ref_pic_list_reordering(h) < 0)
3930
        return -1;
3931

    
3932
    if(h->slice_type_nos!=FF_I_TYPE){
3933
        s->last_picture_ptr= &h->ref_list[0][0];
3934
        ff_copy_picture(&s->last_picture, s->last_picture_ptr);
3935
    }
3936
    if(h->slice_type_nos==FF_B_TYPE){
3937
        s->next_picture_ptr= &h->ref_list[1][0];
3938
        ff_copy_picture(&s->next_picture, s->next_picture_ptr);
3939
    }
3940

    
3941
    if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
3942
       ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
3943
        pred_weight_table(h);
3944
    else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE)
3945
        implicit_weight_table(h);
3946
    else {
3947
        h->use_weight = 0;
3948
        for (i = 0; i < 2; i++) {
3949
            h->luma_weight_flag[i]   = 0;
3950
            h->chroma_weight_flag[i] = 0;
3951
        }
3952
    }
3953

    
3954
    if(h->nal_ref_idc)
3955
        decode_ref_pic_marking(h0, &s->gb);
3956

    
3957
    if(FRAME_MBAFF)
3958
        fill_mbaff_ref_list(h);
3959

    
3960
    if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
3961
        direct_dist_scale_factor(h);
3962
    direct_ref_list_init(h);
3963

    
3964
    if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
3965
        tmp = get_ue_golomb_31(&s->gb);
3966
        if(tmp > 2){
3967
            av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
3968
            return -1;
3969
        }
3970
        h->cabac_init_idc= tmp;
3971
    }
3972

    
3973
    h->last_qscale_diff = 0;
3974
    tmp = h->pps.init_qp + get_se_golomb(&s->gb);
3975
    if(tmp>51){
3976
        av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
3977
        return -1;
3978
    }
3979
    s->qscale= tmp;
3980
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3981
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3982
    //FIXME qscale / qp ... stuff
3983
    if(h->slice_type == FF_SP_TYPE){
3984
        get_bits1(&s->gb); /* sp_for_switch_flag */
3985
    }
3986
    if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
3987
        get_se_golomb(&s->gb); /* slice_qs_delta */
3988
    }
3989

    
3990
    h->deblocking_filter = 1;
3991
    h->slice_alpha_c0_offset = 0;
3992
    h->slice_beta_offset = 0;
3993
    if( h->pps.deblocking_filter_parameters_present ) {
3994
        tmp= get_ue_golomb_31(&s->gb);
3995
        if(tmp > 2){
3996
            av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
3997
            return -1;
3998
        }
3999
        h->deblocking_filter= tmp;
4000
        if(h->deblocking_filter < 2)
4001
            h->deblocking_filter^= 1; // 1<->0
4002

    
4003
        if( h->deblocking_filter ) {
4004
            h->slice_alpha_c0_offset = get_se_golomb(&s->gb) << 1;
4005
            h->slice_beta_offset = get_se_golomb(&s->gb) << 1;
4006
        }
4007
    }
4008

    
4009
    if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
4010
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
4011
       ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
4012
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
4013
        h->deblocking_filter= 0;
4014

    
4015
    if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
4016
        if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
4017
            /* Cheat slightly for speed:
4018
               Do not bother to deblock across slices. */
4019
            h->deblocking_filter = 2;
4020
        } else {
4021
            h0->max_contexts = 1;
4022
            if(!h0->single_decode_warning) {
4023
                av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
4024
                h0->single_decode_warning = 1;
4025
            }
4026
            if(h != h0)
4027
                return 1; // deblocking switched inside frame
4028
        }
4029
    }
4030

    
4031
#if 0 //FMO
4032
    if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
4033
        slice_group_change_cycle= get_bits(&s->gb, ?);
4034
#endif
4035

    
4036
    h0->last_slice_type = slice_type;
4037
    h->slice_num = ++h0->current_slice;
4038
    if(h->slice_num >= MAX_SLICES){
4039
        av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
4040
    }
4041

    
4042
    for(j=0; j<2; j++){
4043
        int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
4044
        ref2frm[0]=
4045
        ref2frm[1]= -1;
4046
        for(i=0; i<16; i++)
4047
            ref2frm[i+2]= 4*h->ref_list[j][i].frame_num
4048
                          +(h->ref_list[j][i].reference&3);
4049
        ref2frm[18+0]=
4050
        ref2frm[18+1]= -1;
4051
        for(i=16; i<48; i++)
4052
            ref2frm[i+4]= 4*h->ref_list[j][i].frame_num
4053
                          +(h->ref_list[j][i].reference&3);
4054
    }
4055

    
4056
    h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
4057
    h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
4058

    
4059
    s->avctx->refs= h->sps.ref_frame_count;
4060

    
4061
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
4062
        av_log(h->s.avctx, AV_LOG_DEBUG, "slice:%d %s mb:%d %c%s%s pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
4063
               h->slice_num,
4064
               (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
4065
               first_mb_in_slice,
4066
               av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
4067
               pps_id, h->frame_num,
4068
               s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
4069
               h->ref_count[0], h->ref_count[1],
4070
               s->qscale,
4071
               h->deblocking_filter, h->slice_alpha_c0_offset/2, h->slice_beta_offset/2,
4072
               h->use_weight,
4073
               h->use_weight==1 && h->use_weight_chroma ? "c" : "",
4074
               h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
4075
               );
4076
    }
4077

    
4078
    return 0;
4079
}
4080

    
4081
/**
4082
 *
4083
 */
4084
static inline int get_level_prefix(GetBitContext *gb){
4085
    unsigned int buf;
4086
    int log;
4087

    
4088
    OPEN_READER(re, gb);
4089
    UPDATE_CACHE(re, gb);
4090
    buf=GET_CACHE(re, gb);
4091

    
4092
    log= 32 - av_log2(buf);
4093
#ifdef TRACE
4094
    print_bin(buf>>(32-log), log);
4095
    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d lpr @%5d in %s get_level_prefix\n", buf>>(32-log), log, log-1, get_bits_count(gb), __FILE__);
4096
#endif
4097

    
4098
    LAST_SKIP_BITS(re, gb, log);
4099
    CLOSE_READER(re, gb);
4100

    
4101
    return log-1;
4102
}
4103

    
4104
static inline int get_dct8x8_allowed(H264Context *h){
4105
    if(h->sps.direct_8x8_inference_flag)
4106
        return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8                )*0x0001000100010001ULL));
4107
    else
4108
        return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8|MB_TYPE_DIRECT2)*0x0001000100010001ULL));
4109
}
4110

    
4111
/**
4112
 * decodes a residual block.
4113
 * @param n block index
4114
 * @param scantable scantable
4115
 * @param max_coeff number of coefficients in the block
4116
 * @return <0 if an error occurred
4117
 */
4118
static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
4119
    MpegEncContext * const s = &h->s;
4120
    static const int coeff_token_table_index[17]= {0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3};
4121
    int level[16];
4122
    int zeros_left, coeff_num, coeff_token, total_coeff, i, j, trailing_ones, run_before;
4123

    
4124
    //FIXME put trailing_onex into the context
4125

    
4126
    if(n == CHROMA_DC_BLOCK_INDEX){
4127
        coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
4128
        total_coeff= coeff_token>>2;
4129
    }else{
4130
        if(n == LUMA_DC_BLOCK_INDEX){
4131
            total_coeff= pred_non_zero_count(h, 0);
4132
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
4133
            total_coeff= coeff_token>>2;
4134
        }else{
4135
            total_coeff= pred_non_zero_count(h, n);
4136
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
4137
            total_coeff= coeff_token>>2;
4138
            h->non_zero_count_cache[ scan8[n] ]= total_coeff;
4139
        }
4140
    }
4141

    
4142
    //FIXME set last_non_zero?
4143

    
4144
    if(total_coeff==0)
4145
        return 0;
4146
    if(total_coeff > (unsigned)max_coeff) {
4147
        av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", s->mb_x, s->mb_y, total_coeff);
4148
        return -1;
4149
    }
4150

    
4151
    trailing_ones= coeff_token&3;
4152
    tprintf(h->s.avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
4153
    assert(total_coeff<=16);
4154

    
4155
    i = show_bits(gb, 3);
4156
    skip_bits(gb, trailing_ones);
4157
    level[0] = 1-((i&4)>>1);
4158
    level[1] = 1-((i&2)   );
4159
    level[2] = 1-((i&1)<<1);
4160

    
4161
    if(trailing_ones<total_coeff) {
4162
        int mask, prefix;
4163
        int suffix_length = total_coeff > 10 && trailing_ones < 3;
4164
        int bitsi= show_bits(gb, LEVEL_TAB_BITS);
4165
        int level_code= cavlc_level_tab[suffix_length][bitsi][0];
4166

    
4167
        skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
4168
        if(level_code >= 100){
4169
            prefix= level_code - 100;
4170
            if(prefix == LEVEL_TAB_BITS)
4171
                prefix += get_level_prefix(gb);
4172

    
4173
            //first coefficient has suffix_length equal to 0 or 1
4174
            if(prefix<14){ //FIXME try to build a large unified VLC table for all this
4175
                if(suffix_length)
4176
                    level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
4177
                else
4178
                    level_code= (prefix<<suffix_length); //part
4179
            }else if(prefix==14){
4180
                if(suffix_length)
4181
                    level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
4182
                else
4183
                    level_code= prefix + get_bits(gb, 4); //part
4184
            }else{
4185
                level_code= (15<<suffix_length) + get_bits(gb, prefix-3); //part
4186
                if(suffix_length==0) level_code+=15; //FIXME doesn't make (much)sense
4187
                if(prefix>=16)
4188
                    level_code += (1<<(prefix-3))-4096;
4189
            }
4190

    
4191
            if(trailing_ones < 3) level_code += 2;
4192

    
4193
            suffix_length = 2;
4194
            mask= -(level_code&1);
4195
            level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
4196
        }else{
4197
            if(trailing_ones < 3) level_code += (level_code>>31)|1;
4198

    
4199
            suffix_length = 1;
4200
            if(level_code + 3U > 6U)
4201
                suffix_length++;
4202
            level[trailing_ones]= level_code;
4203
        }
4204

    
4205
        //remaining coefficients have suffix_length > 0
4206
        for(i=trailing_ones+1;i<total_coeff;i++) {
4207
            static const unsigned int suffix_limit[7] = {0,3,6,12,24,48,INT_MAX };
4208
            int bitsi= show_bits(gb, LEVEL_TAB_BITS);
4209
            level_code= cavlc_level_tab[suffix_length][bitsi][0];
4210

    
4211
            skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
4212
            if(level_code >= 100){
4213
                prefix= level_code - 100;
4214
                if(prefix == LEVEL_TAB_BITS){
4215
                    prefix += get_level_prefix(gb);
4216
                }
4217
                if(prefix<15){
4218
                    level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
4219
                }else{
4220
                    level_code = (15<<suffix_length) + get_bits(gb, prefix-3);
4221
                    if(prefix>=16)
4222
                        level_code += (1<<(prefix-3))-4096;
4223
                }
4224
                mask= -(level_code&1);
4225
                level_code= (((2+level_code)>>1) ^ mask) - mask;
4226
            }
4227
            level[i]= level_code;
4228

    
4229
            if(suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length])
4230
                suffix_length++;
4231
        }
4232
    }
4233

    
4234
    if(total_coeff == max_coeff)
4235
        zeros_left=0;
4236
    else{
4237
        if(n == CHROMA_DC_BLOCK_INDEX)
4238
            zeros_left= get_vlc2(gb, chroma_dc_total_zeros_vlc[ total_coeff-1 ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
4239
        else
4240
            zeros_left= get_vlc2(gb, total_zeros_vlc[ total_coeff-1 ].table, TOTAL_ZEROS_VLC_BITS, 1);
4241
    }
4242

    
4243
    coeff_num = zeros_left + total_coeff - 1;
4244
    j = scantable[coeff_num];
4245
    if(n > 24){
4246
        block[j] = level[0];
4247
        for(i=1;i<total_coeff;i++) {
4248
            if(zeros_left <= 0)
4249
                run_before = 0;
4250
            else if(zeros_left < 7){
4251
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4252
            }else{
4253
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4254
            }
4255
            zeros_left -= run_before;
4256
            coeff_num -= 1 + run_before;
4257
            j= scantable[ coeff_num ];
4258

    
4259
            block[j]= level[i];
4260
        }
4261
    }else{
4262
        block[j] = (level[0] * qmul[j] + 32)>>6;
4263
        for(i=1;i<total_coeff;i++) {
4264
            if(zeros_left <= 0)
4265
                run_before = 0;
4266
            else if(zeros_left < 7){
4267
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4268
            }else{
4269
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4270
            }
4271
            zeros_left -= run_before;
4272
            coeff_num -= 1 + run_before;
4273
            j= scantable[ coeff_num ];
4274

    
4275
            block[j]= (level[i] * qmul[j] + 32)>>6;
4276
        }
4277
    }
4278

    
4279
    if(zeros_left<0){
4280
        av_log(h->s.avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y);
4281
        return -1;
4282
    }
4283

    
4284
    return 0;
4285
}
4286

    
4287
static void predict_field_decoding_flag(H264Context *h){
4288
    MpegEncContext * const s = &h->s;
4289
    const int mb_xy= h->mb_xy;
4290
    int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
4291
                ? s->current_picture.mb_type[mb_xy-1]
4292
                : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
4293
                ? s->current_picture.mb_type[mb_xy-s->mb_stride]
4294
                : 0;
4295
    h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
4296
}
4297

    
4298
/**
4299
 * decodes a P_SKIP or B_SKIP macroblock
4300
 */
4301
static void decode_mb_skip(H264Context *h){
4302
    MpegEncContext * const s = &h->s;
4303
    const int mb_xy= h->mb_xy;
4304
    int mb_type=0;
4305

    
4306
    memset(h->non_zero_count[mb_xy], 0, 16);
4307
    memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui
4308

    
4309
    if(MB_FIELD)
4310
        mb_type|= MB_TYPE_INTERLACED;
4311

    
4312
    if( h->slice_type_nos == FF_B_TYPE )
4313
    {
4314
        // just for fill_caches. pred_direct_motion will set the real mb_type
4315
        mb_type|= MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
4316

    
4317
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4318
        pred_direct_motion(h, &mb_type);
4319
        mb_type|= MB_TYPE_SKIP;
4320
    }
4321
    else
4322
    {
4323
        int mx, my;
4324
        mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
4325

    
4326
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4327
        pred_pskip_motion(h, &mx, &my);
4328
        fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
4329
        fill_rectangle(  h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
4330
    }
4331

    
4332
    write_back_motion(h, mb_type);
4333
    s->current_picture.mb_type[mb_xy]= mb_type;
4334
    s->current_picture.qscale_table[mb_xy]= s->qscale;
4335
    h->slice_table[ mb_xy ]= h->slice_num;
4336
    h->prev_mb_skipped= 1;
4337
}
4338

    
4339
/**
4340
 * decodes a macroblock
4341
 * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
4342
 */
4343
static int decode_mb_cavlc(H264Context *h){
4344
    MpegEncContext * const s = &h->s;
4345
    int mb_xy;
4346
    int partition_count;
4347
    unsigned int mb_type, cbp;
4348
    int dct8x8_allowed= h->pps.transform_8x8_mode;
4349

    
4350
    mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
4351

    
4352
    tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
4353
    cbp = 0; /* avoid warning. FIXME: find a solution without slowing
4354
                down the code */
4355
    if(h->slice_type_nos != FF_I_TYPE){
4356
        if(s->mb_skip_run==-1)
4357
            s->mb_skip_run= get_ue_golomb(&s->gb);
4358

    
4359
        if (s->mb_skip_run--) {
4360
            if(FRAME_MBAFF && (s->mb_y&1) == 0){
4361
                if(s->mb_skip_run==0)
4362
                    h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
4363
                else
4364
                    predict_field_decoding_flag(h);
4365
            }
4366
            decode_mb_skip(h);
4367
            return 0;
4368
        }
4369
    }
4370
    if(FRAME_MBAFF){
4371
        if( (s->mb_y&1) == 0 )
4372
            h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
4373
    }
4374

    
4375
    h->prev_mb_skipped= 0;
4376

    
4377
    mb_type= get_ue_golomb(&s->gb);
4378
    if(h->slice_type_nos == FF_B_TYPE){
4379
        if(mb_type < 23){
4380
            partition_count= b_mb_type_info[mb_type].partition_count;
4381
            mb_type=         b_mb_type_info[mb_type].type;
4382
        }else{
4383
            mb_type -= 23;
4384
            goto decode_intra_mb;
4385
        }
4386
    }else if(h->slice_type_nos == FF_P_TYPE){
4387
        if(mb_type < 5){
4388
            partition_count= p_mb_type_info[mb_type].partition_count;
4389
            mb_type=         p_mb_type_info[mb_type].type;
4390
        }else{
4391
            mb_type -= 5;
4392
            goto decode_intra_mb;
4393
        }
4394
    }else{
4395
       assert(h->slice_type_nos == FF_I_TYPE);
4396
        if(h->slice_type == FF_SI_TYPE && mb_type)
4397
            mb_type--;
4398
decode_intra_mb:
4399
        if(mb_type > 25){
4400
            av_log(h->s.avctx, AV_LOG_ERROR, "mb_type %d in %c slice too large at %d %d\n", mb_type, av_get_pict_type_char(h->slice_type), s->mb_x, s->mb_y);
4401
            return -1;
4402
        }
4403
        partition_count=0;
4404
        cbp= i_mb_type_info[mb_type].cbp;
4405
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
4406
        mb_type= i_mb_type_info[mb_type].type;
4407
    }
4408

    
4409
    if(MB_FIELD)
4410
        mb_type |= MB_TYPE_INTERLACED;
4411

    
4412
    h->slice_table[ mb_xy ]= h->slice_num;
4413

    
4414
    if(IS_INTRA_PCM(mb_type)){
4415
        unsigned int x;
4416

    
4417
        // We assume these blocks are very rare so we do not optimize it.
4418
        align_get_bits(&s->gb);
4419

    
4420
        // The pixels are stored in the same order as levels in h->mb array.
4421
        for(x=0; x < (CHROMA ? 384 : 256); x++){
4422
            ((uint8_t*)h->mb)[x]= get_bits(&s->gb, 8);
4423
        }
4424

    
4425
        // In deblocking, the quantizer is 0
4426
        s->current_picture.qscale_table[mb_xy]= 0;
4427
        // All coeffs are present
4428
        memset(h->non_zero_count[mb_xy], 16, 16);
4429

    
4430
        s->current_picture.mb_type[mb_xy]= mb_type;
4431
        return 0;
4432
    }
4433

    
4434
    if(MB_MBAFF){
4435
        h->ref_count[0] <<= 1;
4436
        h->ref_count[1] <<= 1;
4437
    }
4438

    
4439
    fill_caches(h, mb_type, 0);
4440

    
4441
    //mb_pred
4442
    if(IS_INTRA(mb_type)){
4443
        int pred_mode;
4444
//            init_top_left_availability(h);
4445
        if(IS_INTRA4x4(mb_type)){
4446
            int i;
4447
            int di = 1;
4448
            if(dct8x8_allowed && get_bits1(&s->gb)){
4449
                mb_type |= MB_TYPE_8x8DCT;
4450
                di = 4;
4451
            }
4452

    
4453
//                fill_intra4x4_pred_table(h);
4454
            for(i=0; i<16; i+=di){
4455
                int mode= pred_intra_mode(h, i);
4456

    
4457
                if(!get_bits1(&s->gb)){
4458
                    const int rem_mode= get_bits(&s->gb, 3);
4459
                    mode = rem_mode + (rem_mode >= mode);
4460
                }
4461

    
4462
                if(di==4)
4463
                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
4464
                else
4465
                    h->intra4x4_pred_mode_cache[ scan8[i] ] = mode;
4466
            }
4467
            write_back_intra_pred_mode(h);
4468
            if( check_intra4x4_pred_mode(h) < 0)