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1
/*
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 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3
 * 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
10
 * 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 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 "rectangle.h"
36

    
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#include "cabac.h"
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#ifdef ARCH_X86
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#include "x86/h264_i386.h"
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#endif
41

    
42
//#undef NDEBUG
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#include <assert.h>
44

    
45
/**
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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
50

    
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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};
54

    
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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;
58

    
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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;
62

    
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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;
66

    
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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;
70

    
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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;
74

    
75
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);
77
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);
78
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);
79
static Picture * remove_long(H264Context *h, int i, int ref_mask);
80

    
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static av_always_inline uint32_t pack16to32(int a, int b){
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#ifdef WORDS_BIGENDIAN
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   return (b&0xFFFF) + (a<<16);
84
#else
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   return (a&0xFFFF) + (b<<16);
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#endif
87
}
88

    
89
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,
91
};
92

    
93
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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};
96

    
97
static const int 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}
102
};
103

    
104
#define LEVEL_TAB_BITS 8
105
static int8_t cavlc_level_tab[7][1<<LEVEL_TAB_BITS][2];
106

    
107
static void fill_caches(H264Context *h, int mb_type, int for_deblock){
108
    MpegEncContext * const s = &h->s;
109
    const int mb_xy= h->mb_xy;
110
    int topleft_xy, top_xy, topright_xy, left_xy[2];
111
    int topleft_type, top_type, topright_type, left_type[2];
112
    const int * left_block;
113
    int topleft_partition= -1;
114
    int i;
115

    
116
    top_xy     = mb_xy  - (s->mb_stride << FIELD_PICTURE);
117

    
118
    //FIXME deblocking could skip the intra and nnz parts.
119
    if(for_deblock && (h->slice_num == 1 || h->slice_table[mb_xy] == h->slice_table[top_xy]) && !FRAME_MBAFF)
120
        return;
121

    
122
    /* Wow, what a mess, why didn't they simplify the interlacing & intra
123
     * stuff, I can't imagine that these complex rules are worth it. */
124

    
125
    topleft_xy = top_xy - 1;
126
    topright_xy= top_xy + 1;
127
    left_xy[1] = left_xy[0] = mb_xy-1;
128
    left_block = left_block_options[0];
129
    if(FRAME_MBAFF){
130
        const int pair_xy          = s->mb_x     + (s->mb_y & ~1)*s->mb_stride;
131
        const int top_pair_xy      = pair_xy     - s->mb_stride;
132
        const int topleft_pair_xy  = top_pair_xy - 1;
133
        const int topright_pair_xy = top_pair_xy + 1;
134
        const int topleft_mb_field_flag  = IS_INTERLACED(s->current_picture.mb_type[topleft_pair_xy]);
135
        const int top_mb_field_flag      = IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
136
        const int topright_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[topright_pair_xy]);
137
        const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
138
        const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
139
        const int bottom = (s->mb_y & 1);
140
        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);
141

    
142
        if (curr_mb_field_flag && (bottom || top_mb_field_flag)){
143
            top_xy -= s->mb_stride;
144
        }
145
        if (curr_mb_field_flag && (bottom || topleft_mb_field_flag)){
146
            topleft_xy -= s->mb_stride;
147
        } else if(bottom && !curr_mb_field_flag && left_mb_field_flag) {
148
            topleft_xy += s->mb_stride;
149
            // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
150
            topleft_partition = 0;
151
        }
152
        if (curr_mb_field_flag && (bottom || topright_mb_field_flag)){
153
            topright_xy -= s->mb_stride;
154
        }
155
        if (left_mb_field_flag != curr_mb_field_flag) {
156
            left_xy[1] = left_xy[0] = pair_xy - 1;
157
            if (curr_mb_field_flag) {
158
                left_xy[1] += s->mb_stride;
159
                left_block = left_block_options[3];
160
            } else {
161
                left_block= left_block_options[2 - bottom];
162
            }
163
        }
164
    }
165

    
166
    h->top_mb_xy = top_xy;
167
    h->left_mb_xy[0] = left_xy[0];
168
    h->left_mb_xy[1] = left_xy[1];
169
    if(for_deblock){
170
        topleft_type = 0;
171
        topright_type = 0;
172
        top_type     = h->slice_table[top_xy     ] < 0xFFFF ? s->current_picture.mb_type[top_xy]     : 0;
173
        left_type[0] = h->slice_table[left_xy[0] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[0]] : 0;
174
        left_type[1] = h->slice_table[left_xy[1] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[1]] : 0;
175

    
176
        if(MB_MBAFF && !IS_INTRA(mb_type)){
177
            int list;
178
            for(list=0; list<h->list_count; list++){
179
                //These values where changed for ease of performing MC, we need to change them back
180
                //FIXME maybe we can make MC and loop filter use the same values or prevent
181
                //the MC code from changing ref_cache and rather use a temporary array.
182
                if(USES_LIST(mb_type,list)){
183
                    int8_t *ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
184
                    *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
185
                    *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
186
                    ref += h->b8_stride;
187
                    *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
188
                    *(uint32_t*)&h->ref_cache[list][scan8[10]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
189
                }
190
            }
191
        }
192
    }else{
193
        topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
194
        top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
195
        topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
196
        left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
197
        left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
198

    
199
    if(IS_INTRA(mb_type)){
200
        int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
201
        h->topleft_samples_available=
202
        h->top_samples_available=
203
        h->left_samples_available= 0xFFFF;
204
        h->topright_samples_available= 0xEEEA;
205

    
206
        if(!(top_type & type_mask)){
207
            h->topleft_samples_available= 0xB3FF;
208
            h->top_samples_available= 0x33FF;
209
            h->topright_samples_available= 0x26EA;
210
        }
211
        if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
212
            if(IS_INTERLACED(mb_type)){
213
                if(!(left_type[0] & type_mask)){
214
                    h->topleft_samples_available&= 0xDFFF;
215
                    h->left_samples_available&= 0x5FFF;
216
                }
217
                if(!(left_type[1] & type_mask)){
218
                    h->topleft_samples_available&= 0xFF5F;
219
                    h->left_samples_available&= 0xFF5F;
220
                }
221
            }else{
222
                int left_typei = h->slice_table[left_xy[0] + s->mb_stride ] == h->slice_num
223
                                ? s->current_picture.mb_type[left_xy[0] + s->mb_stride] : 0;
224
                assert(left_xy[0] == left_xy[1]);
225
                if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
226
                    h->topleft_samples_available&= 0xDF5F;
227
                    h->left_samples_available&= 0x5F5F;
228
                }
229
            }
230
        }else{
231
            if(!(left_type[0] & type_mask)){
232
                h->topleft_samples_available&= 0xDF5F;
233
                h->left_samples_available&= 0x5F5F;
234
            }
235
        }
236

    
237
        if(!(topleft_type & type_mask))
238
            h->topleft_samples_available&= 0x7FFF;
239

    
240
        if(!(topright_type & type_mask))
241
            h->topright_samples_available&= 0xFBFF;
242

    
243
        if(IS_INTRA4x4(mb_type)){
244
            if(IS_INTRA4x4(top_type)){
245
                h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
246
                h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
247
                h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
248
                h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
249
            }else{
250
                int pred;
251
                if(!(top_type & type_mask))
252
                    pred= -1;
253
                else{
254
                    pred= 2;
255
                }
256
                h->intra4x4_pred_mode_cache[4+8*0]=
257
                h->intra4x4_pred_mode_cache[5+8*0]=
258
                h->intra4x4_pred_mode_cache[6+8*0]=
259
                h->intra4x4_pred_mode_cache[7+8*0]= pred;
260
            }
261
            for(i=0; i<2; i++){
262
                if(IS_INTRA4x4(left_type[i])){
263
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
264
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
265
                }else{
266
                    int pred;
267
                    if(!(left_type[i] & type_mask))
268
                        pred= -1;
269
                    else{
270
                        pred= 2;
271
                    }
272
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
273
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
274
                }
275
            }
276
        }
277
    }
278
    }
279

    
280

    
281
/*
282
0 . T T. T T T T
283
1 L . .L . . . .
284
2 L . .L . . . .
285
3 . T TL . . . .
286
4 L . .L . . . .
287
5 L . .. . . . .
288
*/
289
//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
290
    if(top_type){
291
        h->non_zero_count_cache[4+8*0]= h->non_zero_count[top_xy][4];
292
        h->non_zero_count_cache[5+8*0]= h->non_zero_count[top_xy][5];
293
        h->non_zero_count_cache[6+8*0]= h->non_zero_count[top_xy][6];
294
        h->non_zero_count_cache[7+8*0]= h->non_zero_count[top_xy][3];
295

    
296
        h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][9];
297
        h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][8];
298

    
299
        h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][12];
300
        h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][11];
301

    
302
    }else{
303
        h->non_zero_count_cache[4+8*0]=
304
        h->non_zero_count_cache[5+8*0]=
305
        h->non_zero_count_cache[6+8*0]=
306
        h->non_zero_count_cache[7+8*0]=
307

    
308
        h->non_zero_count_cache[1+8*0]=
309
        h->non_zero_count_cache[2+8*0]=
310

    
311
        h->non_zero_count_cache[1+8*3]=
312
        h->non_zero_count_cache[2+8*3]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
313

    
314
    }
315

    
316
    for (i=0; i<2; i++) {
317
        if(left_type[i]){
318
            h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[0+2*i]];
319
            h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[1+2*i]];
320
            h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[4+2*i]];
321
            h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[5+2*i]];
322
        }else{
323
            h->non_zero_count_cache[3+8*1 + 2*8*i]=
324
            h->non_zero_count_cache[3+8*2 + 2*8*i]=
325
            h->non_zero_count_cache[0+8*1 +   8*i]=
326
            h->non_zero_count_cache[0+8*4 +   8*i]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
327
        }
328
    }
329

    
330
    if( h->pps.cabac ) {
331
        // top_cbp
332
        if(top_type) {
333
            h->top_cbp = h->cbp_table[top_xy];
334
        } else if(IS_INTRA(mb_type)) {
335
            h->top_cbp = 0x1C0;
336
        } else {
337
            h->top_cbp = 0;
338
        }
339
        // left_cbp
340
        if (left_type[0]) {
341
            h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
342
        } else if(IS_INTRA(mb_type)) {
343
            h->left_cbp = 0x1C0;
344
        } else {
345
            h->left_cbp = 0;
346
        }
347
        if (left_type[0]) {
348
            h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
349
        }
350
        if (left_type[1]) {
351
            h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
352
        }
353
    }
354

    
355
#if 1
356
    if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
357
        int list;
358
        for(list=0; list<h->list_count; list++){
359
            if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type) && !h->deblocking_filter){
360
                /*if(!h->mv_cache_clean[list]){
361
                    memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
362
                    memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
363
                    h->mv_cache_clean[list]= 1;
364
                }*/
365
                continue;
366
            }
367
            h->mv_cache_clean[list]= 0;
368

    
369
            if(USES_LIST(top_type, list)){
370
                const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
371
                const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
372
                *(uint32_t*)h->mv_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0];
373
                *(uint32_t*)h->mv_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1];
374
                *(uint32_t*)h->mv_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2];
375
                *(uint32_t*)h->mv_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3];
376
                h->ref_cache[list][scan8[0] + 0 - 1*8]=
377
                h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
378
                h->ref_cache[list][scan8[0] + 2 - 1*8]=
379
                h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
380
            }else{
381
                *(uint32_t*)h->mv_cache [list][scan8[0] + 0 - 1*8]=
382
                *(uint32_t*)h->mv_cache [list][scan8[0] + 1 - 1*8]=
383
                *(uint32_t*)h->mv_cache [list][scan8[0] + 2 - 1*8]=
384
                *(uint32_t*)h->mv_cache [list][scan8[0] + 3 - 1*8]= 0;
385
                *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
386
            }
387

    
388
            for(i=0; i<2; i++){
389
                int cache_idx = scan8[0] - 1 + i*2*8;
390
                if(USES_LIST(left_type[i], list)){
391
                    const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
392
                    const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
393
                    *(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]];
394
                    *(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]];
395
                    h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
396
                    h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
397
                }else{
398
                    *(uint32_t*)h->mv_cache [list][cache_idx  ]=
399
                    *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
400
                    h->ref_cache[list][cache_idx  ]=
401
                    h->ref_cache[list][cache_idx+8]= left_type[i] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
402
                }
403
            }
404

    
405
            if(for_deblock || ((IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred) && !FRAME_MBAFF))
406
                continue;
407

    
408
            if(USES_LIST(topleft_type, list)){
409
                const int b_xy = h->mb2b_xy[topleft_xy] + 3 + h->b_stride + (topleft_partition & 2*h->b_stride);
410
                const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + (topleft_partition & h->b8_stride);
411
                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
412
                h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
413
            }else{
414
                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
415
                h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
416
            }
417

    
418
            if(USES_LIST(topright_type, list)){
419
                const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
420
                const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
421
                *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
422
                h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
423
            }else{
424
                *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
425
                h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
426
            }
427

    
428
            if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
429
                continue;
430

    
431
            h->ref_cache[list][scan8[5 ]+1] =
432
            h->ref_cache[list][scan8[7 ]+1] =
433
            h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
434
            h->ref_cache[list][scan8[4 ]] =
435
            h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
436
            *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
437
            *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
438
            *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
439
            *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
440
            *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
441

    
442
            if( h->pps.cabac ) {
443
                /* XXX beurk, Load mvd */
444
                if(USES_LIST(top_type, list)){
445
                    const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
446
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 0];
447
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 1];
448
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 2];
449
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 3];
450
                }else{
451
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 0 - 1*8]=
452
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 1 - 1*8]=
453
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 2 - 1*8]=
454
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 3 - 1*8]= 0;
455
                }
456
                if(USES_LIST(left_type[0], list)){
457
                    const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
458
                    *(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]];
459
                    *(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]];
460
                }else{
461
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
462
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
463
                }
464
                if(USES_LIST(left_type[1], list)){
465
                    const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
466
                    *(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]];
467
                    *(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]];
468
                }else{
469
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
470
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
471
                }
472
                *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
473
                *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
474
                *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
475
                *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
476
                *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
477

    
478
                if(h->slice_type_nos == FF_B_TYPE){
479
                    fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);
480

    
481
                    if(IS_DIRECT(top_type)){
482
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
483
                    }else if(IS_8X8(top_type)){
484
                        int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
485
                        h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
486
                        h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
487
                    }else{
488
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
489
                    }
490

    
491
                    if(IS_DIRECT(left_type[0]))
492
                        h->direct_cache[scan8[0] - 1 + 0*8]= 1;
493
                    else if(IS_8X8(left_type[0]))
494
                        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)];
495
                    else
496
                        h->direct_cache[scan8[0] - 1 + 0*8]= 0;
497

    
498
                    if(IS_DIRECT(left_type[1]))
499
                        h->direct_cache[scan8[0] - 1 + 2*8]= 1;
500
                    else if(IS_8X8(left_type[1]))
501
                        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)];
502
                    else
503
                        h->direct_cache[scan8[0] - 1 + 2*8]= 0;
504
                }
505
            }
506

    
507
            if(FRAME_MBAFF){
508
#define MAP_MVS\
509
                    MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
510
                    MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
511
                    MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
512
                    MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
513
                    MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
514
                    MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
515
                    MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
516
                    MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
517
                    MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
518
                    MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
519
                if(MB_FIELD){
520
#define MAP_F2F(idx, mb_type)\
521
                    if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
522
                        h->ref_cache[list][idx] <<= 1;\
523
                        h->mv_cache[list][idx][1] /= 2;\
524
                        h->mvd_cache[list][idx][1] /= 2;\
525
                    }
526
                    MAP_MVS
527
#undef MAP_F2F
528
                }else{
529
#define MAP_F2F(idx, mb_type)\
530
                    if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
531
                        h->ref_cache[list][idx] >>= 1;\
532
                        h->mv_cache[list][idx][1] <<= 1;\
533
                        h->mvd_cache[list][idx][1] <<= 1;\
534
                    }
535
                    MAP_MVS
536
#undef MAP_F2F
537
                }
538
            }
539
        }
540
    }
541
#endif
542

    
543
    h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
544
}
545

    
546
static inline void write_back_intra_pred_mode(H264Context *h){
547
    const int mb_xy= h->mb_xy;
548

    
549
    h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
550
    h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
551
    h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
552
    h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
553
    h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
554
    h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
555
    h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
556
}
557

    
558
/**
559
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
560
 */
561
static inline int check_intra4x4_pred_mode(H264Context *h){
562
    MpegEncContext * const s = &h->s;
563
    static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
564
    static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
565
    int i;
566

    
567
    if(!(h->top_samples_available&0x8000)){
568
        for(i=0; i<4; i++){
569
            int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
570
            if(status<0){
571
                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);
572
                return -1;
573
            } else if(status){
574
                h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
575
            }
576
        }
577
    }
578

    
579
    if((h->left_samples_available&0x8888)!=0x8888){
580
        static const int mask[4]={0x8000,0x2000,0x80,0x20};
581
        for(i=0; i<4; i++){
582
            if(!(h->left_samples_available&mask[i])){
583
                int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
584
                if(status<0){
585
                    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);
586
                    return -1;
587
                } else if(status){
588
                    h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
589
                }
590
            }
591
        }
592
    }
593

    
594
    return 0;
595
} //FIXME cleanup like next
596

    
597
/**
598
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
599
 */
600
static inline int check_intra_pred_mode(H264Context *h, int mode){
601
    MpegEncContext * const s = &h->s;
602
    static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
603
    static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
604

    
605
    if(mode > 6U) {
606
        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);
607
        return -1;
608
    }
609

    
610
    if(!(h->top_samples_available&0x8000)){
611
        mode= top[ mode ];
612
        if(mode<0){
613
            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);
614
            return -1;
615
        }
616
    }
617

    
618
    if((h->left_samples_available&0x8080) != 0x8080){
619
        mode= left[ mode ];
620
        if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
621
            mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
622
        }
623
        if(mode<0){
624
            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);
625
            return -1;
626
        }
627
    }
628

    
629
    return mode;
630
}
631

    
632
/**
633
 * gets the predicted intra4x4 prediction mode.
634
 */
635
static inline int pred_intra_mode(H264Context *h, int n){
636
    const int index8= scan8[n];
637
    const int left= h->intra4x4_pred_mode_cache[index8 - 1];
638
    const int top = h->intra4x4_pred_mode_cache[index8 - 8];
639
    const int min= FFMIN(left, top);
640

    
641
    tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
642

    
643
    if(min<0) return DC_PRED;
644
    else      return min;
645
}
646

    
647
static inline void write_back_non_zero_count(H264Context *h){
648
    const int mb_xy= h->mb_xy;
649

    
650
    h->non_zero_count[mb_xy][0]= h->non_zero_count_cache[7+8*1];
651
    h->non_zero_count[mb_xy][1]= h->non_zero_count_cache[7+8*2];
652
    h->non_zero_count[mb_xy][2]= h->non_zero_count_cache[7+8*3];
653
    h->non_zero_count[mb_xy][3]= h->non_zero_count_cache[7+8*4];
654
    h->non_zero_count[mb_xy][4]= h->non_zero_count_cache[4+8*4];
655
    h->non_zero_count[mb_xy][5]= h->non_zero_count_cache[5+8*4];
656
    h->non_zero_count[mb_xy][6]= h->non_zero_count_cache[6+8*4];
657

    
658
    h->non_zero_count[mb_xy][9]= h->non_zero_count_cache[1+8*2];
659
    h->non_zero_count[mb_xy][8]= h->non_zero_count_cache[2+8*2];
660
    h->non_zero_count[mb_xy][7]= h->non_zero_count_cache[2+8*1];
661

    
662
    h->non_zero_count[mb_xy][12]=h->non_zero_count_cache[1+8*5];
663
    h->non_zero_count[mb_xy][11]=h->non_zero_count_cache[2+8*5];
664
    h->non_zero_count[mb_xy][10]=h->non_zero_count_cache[2+8*4];
665
}
666

    
667
/**
668
 * gets the predicted number of non-zero coefficients.
669
 * @param n block index
670
 */
671
static inline int pred_non_zero_count(H264Context *h, int n){
672
    const int index8= scan8[n];
673
    const int left= h->non_zero_count_cache[index8 - 1];
674
    const int top = h->non_zero_count_cache[index8 - 8];
675
    int i= left + top;
676

    
677
    if(i<64) i= (i+1)>>1;
678

    
679
    tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
680

    
681
    return i&31;
682
}
683

    
684
static inline int fetch_diagonal_mv(H264Context *h, const int16_t **C, int i, int list, int part_width){
685
    const int topright_ref= h->ref_cache[list][ i - 8 + part_width ];
686
    MpegEncContext *s = &h->s;
687

    
688
    /* there is no consistent mapping of mvs to neighboring locations that will
689
     * make mbaff happy, so we can't move all this logic to fill_caches */
690
    if(FRAME_MBAFF){
691
        const uint32_t *mb_types = s->current_picture_ptr->mb_type;
692
        const int16_t *mv;
693
        *(uint32_t*)h->mv_cache[list][scan8[0]-2] = 0;
694
        *C = h->mv_cache[list][scan8[0]-2];
695

    
696
        if(!MB_FIELD
697
           && (s->mb_y&1) && i < scan8[0]+8 && topright_ref != PART_NOT_AVAILABLE){
698
            int topright_xy = s->mb_x + (s->mb_y-1)*s->mb_stride + (i == scan8[0]+3);
699
            if(IS_INTERLACED(mb_types[topright_xy])){
700
#define SET_DIAG_MV(MV_OP, REF_OP, X4, Y4)\
701
                const int x4 = X4, y4 = Y4;\
702
                const int mb_type = mb_types[(x4>>2)+(y4>>2)*s->mb_stride];\
703
                if(!USES_LIST(mb_type,list))\
704
                    return LIST_NOT_USED;\
705
                mv = s->current_picture_ptr->motion_val[list][x4 + y4*h->b_stride];\
706
                h->mv_cache[list][scan8[0]-2][0] = mv[0];\
707
                h->mv_cache[list][scan8[0]-2][1] = mv[1] MV_OP;\
708
                return s->current_picture_ptr->ref_index[list][(x4>>1) + (y4>>1)*h->b8_stride] REF_OP;
709

    
710
                SET_DIAG_MV(*2, >>1, s->mb_x*4+(i&7)-4+part_width, s->mb_y*4-1);
711
            }
712
        }
713
        if(topright_ref == PART_NOT_AVAILABLE
714
           && ((s->mb_y&1) || i >= scan8[0]+8) && (i&7)==4
715
           && h->ref_cache[list][scan8[0]-1] != PART_NOT_AVAILABLE){
716
            if(!MB_FIELD
717
               && IS_INTERLACED(mb_types[h->left_mb_xy[0]])){
718
                SET_DIAG_MV(*2, >>1, s->mb_x*4-1, (s->mb_y|1)*4+(s->mb_y&1)*2+(i>>4)-1);
719
            }
720
            if(MB_FIELD
721
               && !IS_INTERLACED(mb_types[h->left_mb_xy[0]])
722
               && i >= scan8[0]+8){
723
                // left shift will turn LIST_NOT_USED into PART_NOT_AVAILABLE, but that's OK.
724
                SET_DIAG_MV(/2, <<1, s->mb_x*4-1, (s->mb_y&~1)*4 - 1 + ((i-scan8[0])>>3)*2);
725
            }
726
        }
727
#undef SET_DIAG_MV
728
    }
729

    
730
    if(topright_ref != PART_NOT_AVAILABLE){
731
        *C= h->mv_cache[list][ i - 8 + part_width ];
732
        return topright_ref;
733
    }else{
734
        tprintf(s->avctx, "topright MV not available\n");
735

    
736
        *C= h->mv_cache[list][ i - 8 - 1 ];
737
        return h->ref_cache[list][ i - 8 - 1 ];
738
    }
739
}
740

    
741
/**
742
 * gets the predicted MV.
743
 * @param n the block index
744
 * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
745
 * @param mx the x component of the predicted motion vector
746
 * @param my the y component of the predicted motion vector
747
 */
748
static inline void pred_motion(H264Context * const h, int n, int part_width, int list, int ref, int * const mx, int * const my){
749
    const int index8= scan8[n];
750
    const int top_ref=      h->ref_cache[list][ index8 - 8 ];
751
    const int left_ref=     h->ref_cache[list][ index8 - 1 ];
752
    const int16_t * const A= h->mv_cache[list][ index8 - 1 ];
753
    const int16_t * const B= h->mv_cache[list][ index8 - 8 ];
754
    const int16_t * C;
755
    int diagonal_ref, match_count;
756

    
757
    assert(part_width==1 || part_width==2 || part_width==4);
758

    
759
/* mv_cache
760
  B . . A T T T T
761
  U . . L . . , .
762
  U . . L . . . .
763
  U . . L . . , .
764
  . . . L . . . .
765
*/
766

    
767
    diagonal_ref= fetch_diagonal_mv(h, &C, index8, list, part_width);
768
    match_count= (diagonal_ref==ref) + (top_ref==ref) + (left_ref==ref);
769
    tprintf(h->s.avctx, "pred_motion match_count=%d\n", match_count);
770
    if(match_count > 1){ //most common
771
        *mx= mid_pred(A[0], B[0], C[0]);
772
        *my= mid_pred(A[1], B[1], C[1]);
773
    }else if(match_count==1){
774
        if(left_ref==ref){
775
            *mx= A[0];
776
            *my= A[1];
777
        }else if(top_ref==ref){
778
            *mx= B[0];
779
            *my= B[1];
780
        }else{
781
            *mx= C[0];
782
            *my= C[1];
783
        }
784
    }else{
785
        if(top_ref == PART_NOT_AVAILABLE && diagonal_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){
786
            *mx= A[0];
787
            *my= A[1];
788
        }else{
789
            *mx= mid_pred(A[0], B[0], C[0]);
790
            *my= mid_pred(A[1], B[1], C[1]);
791
        }
792
    }
793

    
794
    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);
795
}
796

    
797
/**
798
 * gets the directionally predicted 16x8 MV.
799
 * @param n the block index
800
 * @param mx the x component of the predicted motion vector
801
 * @param my the y component of the predicted motion vector
802
 */
803
static inline void pred_16x8_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
804
    if(n==0){
805
        const int top_ref=      h->ref_cache[list][ scan8[0] - 8 ];
806
        const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];
807

    
808
        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);
809

    
810
        if(top_ref == ref){
811
            *mx= B[0];
812
            *my= B[1];
813
            return;
814
        }
815
    }else{
816
        const int left_ref=     h->ref_cache[list][ scan8[8] - 1 ];
817
        const int16_t * const A= h->mv_cache[list][ scan8[8] - 1 ];
818

    
819
        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);
820

    
821
        if(left_ref == ref){
822
            *mx= A[0];
823
            *my= A[1];
824
            return;
825
        }
826
    }
827

    
828
    //RARE
829
    pred_motion(h, n, 4, list, ref, mx, my);
830
}
831

    
832
/**
833
 * gets the directionally predicted 8x16 MV.
834
 * @param n the block index
835
 * @param mx the x component of the predicted motion vector
836
 * @param my the y component of the predicted motion vector
837
 */
838
static inline void pred_8x16_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
839
    if(n==0){
840
        const int left_ref=      h->ref_cache[list][ scan8[0] - 1 ];
841
        const int16_t * const A=  h->mv_cache[list][ scan8[0] - 1 ];
842

    
843
        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);
844

    
845
        if(left_ref == ref){
846
            *mx= A[0];
847
            *my= A[1];
848
            return;
849
        }
850
    }else{
851
        const int16_t * C;
852
        int diagonal_ref;
853

    
854
        diagonal_ref= fetch_diagonal_mv(h, &C, scan8[4], list, 2);
855

    
856
        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);
857

    
858
        if(diagonal_ref == ref){
859
            *mx= C[0];
860
            *my= C[1];
861
            return;
862
        }
863
    }
864

    
865
    //RARE
866
    pred_motion(h, n, 2, list, ref, mx, my);
867
}
868

    
869
static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my){
870
    const int top_ref = h->ref_cache[0][ scan8[0] - 8 ];
871
    const int left_ref= h->ref_cache[0][ scan8[0] - 1 ];
872

    
873
    tprintf(h->s.avctx, "pred_pskip: (%d) (%d) at %2d %2d\n", top_ref, left_ref, h->s.mb_x, h->s.mb_y);
874

    
875
    if(top_ref == PART_NOT_AVAILABLE || left_ref == PART_NOT_AVAILABLE
876
       || (top_ref == 0  && *(uint32_t*)h->mv_cache[0][ scan8[0] - 8 ] == 0)
877
       || (left_ref == 0 && *(uint32_t*)h->mv_cache[0][ scan8[0] - 1 ] == 0)){
878

    
879
        *mx = *my = 0;
880
        return;
881
    }
882

    
883
    pred_motion(h, 0, 4, 0, 0, mx, my);
884

    
885
    return;
886
}
887

    
888
static int get_scale_factor(H264Context * const h, int poc, int poc1, int i){
889
    int poc0 = h->ref_list[0][i].poc;
890
    int td = av_clip(poc1 - poc0, -128, 127);
891
    if(td == 0 || h->ref_list[0][i].long_ref){
892
        return 256;
893
    }else{
894
        int tb = av_clip(poc - poc0, -128, 127);
895
        int tx = (16384 + (FFABS(td) >> 1)) / td;
896
        return av_clip((tb*tx + 32) >> 6, -1024, 1023);
897
    }
898
}
899

    
900
static inline void direct_dist_scale_factor(H264Context * const h){
901
    MpegEncContext * const s = &h->s;
902
    const int poc = h->s.current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
903
    const int poc1 = h->ref_list[1][0].poc;
904
    int i, field;
905
    for(field=0; field<2; field++){
906
        const int poc  = h->s.current_picture_ptr->field_poc[field];
907
        const int poc1 = h->ref_list[1][0].field_poc[field];
908
        for(i=0; i < 2*h->ref_count[0]; i++)
909
            h->dist_scale_factor_field[field][i^field] = get_scale_factor(h, poc, poc1, i+16);
910
    }
911

    
912
    for(i=0; i<h->ref_count[0]; i++){
913
        h->dist_scale_factor[i] = get_scale_factor(h, poc, poc1, i);
914
    }
915
}
916

    
917
static void fill_colmap(H264Context *h, int map[2][16+32], int list, int field, int colfield, int mbafi){
918
    MpegEncContext * const s = &h->s;
919
    Picture * const ref1 = &h->ref_list[1][0];
920
    int j, old_ref, rfield;
921
    int start= mbafi ? 16                      : 0;
922
    int end  = mbafi ? 16+2*h->ref_count[list] : h->ref_count[list];
923
    int interl= mbafi || s->picture_structure != PICT_FRAME;
924

    
925
    /* bogus; fills in for missing frames */
926
    memset(map[list], 0, sizeof(map[list]));
927

    
928
    for(rfield=0; rfield<2; rfield++){
929
        for(old_ref=0; old_ref<ref1->ref_count[colfield][list]; old_ref++){
930
            int poc = ref1->ref_poc[colfield][list][old_ref];
931

    
932
            if     (!interl)
933
                poc |= 3;
934
            else if( interl && (poc&3) == 3) //FIXME store all MBAFF references so this isnt needed
935
                poc= (poc&~3) + rfield + 1;
936

    
937
            for(j=start; j<end; j++){
938
                if(4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3) == poc){
939
                    int cur_ref= mbafi ? (j-16)^field : j;
940
                    map[list][2*old_ref + (rfield^field) + 16] = cur_ref;
941
                    if(rfield == field)
942
                        map[list][old_ref] = cur_ref;
943
                    break;
944
                }
945
            }
946
        }
947
    }
948
}
949

    
950
static inline void direct_ref_list_init(H264Context * const h){
951
    MpegEncContext * const s = &h->s;
952
    Picture * const ref1 = &h->ref_list[1][0];
953
    Picture * const cur = s->current_picture_ptr;
954
    int list, j, field;
955
    int sidx= (s->picture_structure&1)^1;
956
    int ref1sidx= (ref1->reference&1)^1;
957

    
958
    for(list=0; list<2; list++){
959
        cur->ref_count[sidx][list] = h->ref_count[list];
960
        for(j=0; j<h->ref_count[list]; j++)
961
            cur->ref_poc[sidx][list][j] = 4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3);
962
    }
963

    
964
    if(s->picture_structure == PICT_FRAME){
965
        memcpy(cur->ref_count[1], cur->ref_count[0], sizeof(cur->ref_count[0]));
966
        memcpy(cur->ref_poc  [1], cur->ref_poc  [0], sizeof(cur->ref_poc  [0]));
967
    }
968

    
969
    cur->mbaff= FRAME_MBAFF;
970

    
971
    if(cur->pict_type != FF_B_TYPE || h->direct_spatial_mv_pred)
972
        return;
973

    
974
    for(list=0; list<2; list++){
975
        fill_colmap(h, h->map_col_to_list0, list, sidx, ref1sidx, 0);
976
        for(field=0; field<2; field++)
977
            fill_colmap(h, h->map_col_to_list0_field[field], list, field, field, 1);
978
    }
979
}
980

    
981
static inline void pred_direct_motion(H264Context * const h, int *mb_type){
982
    MpegEncContext * const s = &h->s;
983
    int b8_stride = h->b8_stride;
984
    int b4_stride = h->b_stride;
985
    int mb_xy = h->mb_xy;
986
    int mb_type_col[2];
987
    const int16_t (*l1mv0)[2], (*l1mv1)[2];
988
    const int8_t *l1ref0, *l1ref1;
989
    const int is_b8x8 = IS_8X8(*mb_type);
990
    unsigned int sub_mb_type;
991
    int i8, i4;
992

    
993
#define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
994

    
995
    if(IS_INTERLACED(h->ref_list[1][0].mb_type[mb_xy])){ // AFL/AFR/FR/FL -> AFL/FL
996
        if(!IS_INTERLACED(*mb_type)){                    //     AFR/FR    -> AFL/FL
997
            int cur_poc = s->current_picture_ptr->poc;
998
            int *col_poc = h->ref_list[1]->field_poc;
999
            int col_parity = FFABS(col_poc[0] - cur_poc) >= FFABS(col_poc[1] - cur_poc);
1000
            mb_xy= s->mb_x + ((s->mb_y&~1) + col_parity)*s->mb_stride;
1001
            b8_stride = 0;
1002
        }else if(!(s->picture_structure & h->ref_list[1][0].reference) && !h->ref_list[1][0].mbaff){// FL -> FL & differ parity
1003
            int fieldoff= 2*(h->ref_list[1][0].reference)-3;
1004
            mb_xy += s->mb_stride*fieldoff;
1005
        }
1006
        goto single_col;
1007
    }else{                                               // AFL/AFR/FR/FL -> AFR/FR
1008
        if(IS_INTERLACED(*mb_type)){                     // AFL       /FL -> AFR/FR
1009
            mb_xy= s->mb_x + (s->mb_y&~1)*s->mb_stride;
1010
            mb_type_col[0] = h->ref_list[1][0].mb_type[mb_xy];
1011
            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy + s->mb_stride];
1012
            b8_stride *= 3;
1013
            b4_stride *= 6;
1014
            //FIXME IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag
1015
            if(    (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
1016
                && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
1017
                && !is_b8x8){
1018
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1019
                *mb_type   |= MB_TYPE_16x8 |MB_TYPE_L0L1|MB_TYPE_DIRECT2; /* B_16x8 */
1020
            }else{
1021
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1022
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1023
            }
1024
        }else{                                           //     AFR/FR    -> AFR/FR
1025
single_col:
1026
            mb_type_col[0] =
1027
            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy];
1028
            if(IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag){
1029
                /* FIXME save sub mb types from previous frames (or derive from MVs)
1030
                * so we know exactly what block size to use */
1031
                sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
1032
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1033
            }else if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
1034
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1035
                *mb_type   |= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
1036
            }else{
1037
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1038
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1039
            }
1040
        }
1041
    }
1042

    
1043
    l1mv0  = &h->ref_list[1][0].motion_val[0][h->mb2b_xy [mb_xy]];
1044
    l1mv1  = &h->ref_list[1][0].motion_val[1][h->mb2b_xy [mb_xy]];
1045
    l1ref0 = &h->ref_list[1][0].ref_index [0][h->mb2b8_xy[mb_xy]];
1046
    l1ref1 = &h->ref_list[1][0].ref_index [1][h->mb2b8_xy[mb_xy]];
1047
    if(!b8_stride){
1048
        if(s->mb_y&1){
1049
            l1ref0 += h->b8_stride;
1050
            l1ref1 += h->b8_stride;
1051
            l1mv0  +=  2*b4_stride;
1052
            l1mv1  +=  2*b4_stride;
1053
        }
1054
    }
1055

    
1056
    if(h->direct_spatial_mv_pred){
1057
        int ref[2];
1058
        int mv[2][2];
1059
        int list;
1060

    
1061
        /* FIXME interlacing + spatial direct uses wrong colocated block positions */
1062

    
1063
        /* ref = min(neighbors) */
1064
        for(list=0; list<2; list++){
1065
            int refa = h->ref_cache[list][scan8[0] - 1];
1066
            int refb = h->ref_cache[list][scan8[0] - 8];
1067
            int refc = h->ref_cache[list][scan8[0] - 8 + 4];
1068
            if(refc == PART_NOT_AVAILABLE)
1069
                refc = h->ref_cache[list][scan8[0] - 8 - 1];
1070
            ref[list] = FFMIN3((unsigned)refa, (unsigned)refb, (unsigned)refc);
1071
            if(ref[list] < 0)
1072
                ref[list] = -1;
1073
        }
1074

    
1075
        if(ref[0] < 0 && ref[1] < 0){
1076
            ref[0] = ref[1] = 0;
1077
            mv[0][0] = mv[0][1] =
1078
            mv[1][0] = mv[1][1] = 0;
1079
        }else{
1080
            for(list=0; list<2; list++){
1081
                if(ref[list] >= 0)
1082
                    pred_motion(h, 0, 4, list, ref[list], &mv[list][0], &mv[list][1]);
1083
                else
1084
                    mv[list][0] = mv[list][1] = 0;
1085
            }
1086
        }
1087

    
1088
        if(ref[1] < 0){
1089
            if(!is_b8x8)
1090
                *mb_type &= ~MB_TYPE_L1;
1091
            sub_mb_type &= ~MB_TYPE_L1;
1092
        }else if(ref[0] < 0){
1093
            if(!is_b8x8)
1094
                *mb_type &= ~MB_TYPE_L0;
1095
            sub_mb_type &= ~MB_TYPE_L0;
1096
        }
1097

    
1098
        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
1099
            for(i8=0; i8<4; i8++){
1100
                int x8 = i8&1;
1101
                int y8 = i8>>1;
1102
                int xy8 = x8+y8*b8_stride;
1103
                int xy4 = 3*x8+y8*b4_stride;
1104
                int a=0, b=0;
1105

    
1106
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1107
                    continue;
1108
                h->sub_mb_type[i8] = sub_mb_type;
1109

    
1110
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1111
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1112
                if(!IS_INTRA(mb_type_col[y8])
1113
                   && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
1114
                       || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
1115
                    if(ref[0] > 0)
1116
                        a= pack16to32(mv[0][0],mv[0][1]);
1117
                    if(ref[1] > 0)
1118
                        b= pack16to32(mv[1][0],mv[1][1]);
1119
                }else{
1120
                    a= pack16to32(mv[0][0],mv[0][1]);
1121
                    b= pack16to32(mv[1][0],mv[1][1]);
1122
                }
1123
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
1124
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
1125
            }
1126
        }else if(IS_16X16(*mb_type)){
1127
            int a=0, b=0;
1128

    
1129
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
1130
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
1131
            if(!IS_INTRA(mb_type_col[0])
1132
               && (   (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
1133
                   || (l1ref0[0]  < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
1134
                       && (h->x264_build>33 || !h->x264_build)))){
1135
                if(ref[0] > 0)
1136
                    a= pack16to32(mv[0][0],mv[0][1]);
1137
                if(ref[1] > 0)
1138
                    b= pack16to32(mv[1][0],mv[1][1]);
1139
            }else{
1140
                a= pack16to32(mv[0][0],mv[0][1]);
1141
                b= pack16to32(mv[1][0],mv[1][1]);
1142
            }
1143
            fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
1144
            fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
1145
        }else{
1146
            for(i8=0; i8<4; i8++){
1147
                const int x8 = i8&1;
1148
                const int y8 = i8>>1;
1149

    
1150
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1151
                    continue;
1152
                h->sub_mb_type[i8] = sub_mb_type;
1153

    
1154
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mv[0][0],mv[0][1]), 4);
1155
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mv[1][0],mv[1][1]), 4);
1156
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1157
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1158

    
1159
                /* col_zero_flag */
1160
                if(!IS_INTRA(mb_type_col[0]) && (   l1ref0[x8 + y8*b8_stride] == 0
1161
                                              || (l1ref0[x8 + y8*b8_stride] < 0 && l1ref1[x8 + y8*b8_stride] == 0
1162
                                                  && (h->x264_build>33 || !h->x264_build)))){
1163
                    const int16_t (*l1mv)[2]= l1ref0[x8 + y8*b8_stride] == 0 ? l1mv0 : l1mv1;
1164
                    if(IS_SUB_8X8(sub_mb_type)){
1165
                        const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
1166
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1167
                            if(ref[0] == 0)
1168
                                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1169
                            if(ref[1] == 0)
1170
                                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1171
                        }
1172
                    }else
1173
                    for(i4=0; i4<4; i4++){
1174
                        const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1175
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1176
                            if(ref[0] == 0)
1177
                                *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
1178
                            if(ref[1] == 0)
1179
                                *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] = 0;
1180
                        }
1181
                    }
1182
                }
1183
            }
1184
        }
1185
    }else{ /* direct temporal mv pred */
1186
        const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
1187
        const int *dist_scale_factor = h->dist_scale_factor;
1188
        int ref_offset= 0;
1189

    
1190
        if(FRAME_MBAFF && IS_INTERLACED(*mb_type)){
1191
            map_col_to_list0[0] = h->map_col_to_list0_field[s->mb_y&1][0];
1192
            map_col_to_list0[1] = h->map_col_to_list0_field[s->mb_y&1][1];
1193
            dist_scale_factor   =h->dist_scale_factor_field[s->mb_y&1];
1194
        }
1195
        if(h->ref_list[1][0].mbaff && IS_INTERLACED(mb_type_col[0]))
1196
            ref_offset += 16;
1197

    
1198
        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
1199
            /* FIXME assumes direct_8x8_inference == 1 */
1200
            int y_shift  = 2*!IS_INTERLACED(*mb_type);
1201

    
1202
            for(i8=0; i8<4; i8++){
1203
                const int x8 = i8&1;
1204
                const int y8 = i8>>1;
1205
                int ref0, scale;
1206
                const int16_t (*l1mv)[2]= l1mv0;
1207

    
1208
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1209
                    continue;
1210
                h->sub_mb_type[i8] = sub_mb_type;
1211

    
1212
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1213
                if(IS_INTRA(mb_type_col[y8])){
1214
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1215
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1216
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1217
                    continue;
1218
                }
1219

    
1220
                ref0 = l1ref0[x8 + y8*b8_stride];
1221
                if(ref0 >= 0)
1222
                    ref0 = map_col_to_list0[0][ref0 + ref_offset];
1223
                else{
1224
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
1225
                    l1mv= l1mv1;
1226
                }
1227
                scale = dist_scale_factor[ref0];
1228
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1229

    
1230
                {
1231
                    const int16_t *mv_col = l1mv[x8*3 + y8*b4_stride];
1232
                    int my_col = (mv_col[1]<<y_shift)/2;
1233
                    int mx = (scale * mv_col[0] + 128) >> 8;
1234
                    int my = (scale * my_col + 128) >> 8;
1235
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1236
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
1237
                }
1238
            }
1239
            return;
1240
        }
1241

    
1242
        /* one-to-one mv scaling */
1243

    
1244
        if(IS_16X16(*mb_type)){
1245
            int ref, mv0, mv1;
1246

    
1247
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
1248
            if(IS_INTRA(mb_type_col[0])){
1249
                ref=mv0=mv1=0;
1250
            }else{
1251
                const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0] + ref_offset]
1252
                                                : map_col_to_list0[1][l1ref1[0] + ref_offset];
1253
                const int scale = dist_scale_factor[ref0];
1254
                const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
1255
                int mv_l0[2];
1256
                mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1257
                mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1258
                ref= ref0;
1259
                mv0= pack16to32(mv_l0[0],mv_l0[1]);
1260
                mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1261
            }
1262
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
1263
            fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
1264
            fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
1265
        }else{
1266
            for(i8=0; i8<4; i8++){
1267
                const int x8 = i8&1;
1268
                const int y8 = i8>>1;
1269
                int ref0, scale;
1270
                const int16_t (*l1mv)[2]= l1mv0;
1271

    
1272
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1273
                    continue;
1274
                h->sub_mb_type[i8] = sub_mb_type;
1275
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1276
                if(IS_INTRA(mb_type_col[0])){
1277
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1278
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1279
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1280
                    continue;
1281
                }
1282

    
1283
                ref0 = l1ref0[x8 + y8*b8_stride] + ref_offset;
1284
                if(ref0 >= 0)
1285
                    ref0 = map_col_to_list0[0][ref0];
1286
                else{
1287
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
1288
                    l1mv= l1mv1;
1289
                }
1290
                scale = dist_scale_factor[ref0];
1291

    
1292
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1293
                if(IS_SUB_8X8(sub_mb_type)){
1294
                    const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
1295
                    int mx = (scale * mv_col[0] + 128) >> 8;
1296
                    int my = (scale * mv_col[1] + 128) >> 8;
1297
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1298
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
1299
                }else
1300
                for(i4=0; i4<4; i4++){
1301
                    const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1302
                    int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
1303
                    mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1304
                    mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1305
                    *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] =
1306
                        pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1307
                }
1308
            }
1309
        }
1310
    }
1311
}
1312

    
1313
static inline void write_back_motion(H264Context *h, int mb_type){
1314
    MpegEncContext * const s = &h->s;
1315
    const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1316
    const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1317
    int list;
1318

    
1319
    if(!USES_LIST(mb_type, 0))
1320
        fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);
1321

    
1322
    for(list=0; list<h->list_count; list++){
1323
        int y;
1324
        if(!USES_LIST(mb_type, list))
1325
            continue;
1326

    
1327
        for(y=0; y<4; y++){
1328
            *(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];
1329
            *(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];
1330
        }
1331
        if( h->pps.cabac ) {
1332
            if(IS_SKIP(mb_type))
1333
                fill_rectangle(h->mvd_table[list][b_xy], 4, 4, h->b_stride, 0, 4);
1334
            else
1335
            for(y=0; y<4; y++){
1336
                *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+0 + 8*y];
1337
                *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+2 + 8*y];
1338
            }
1339
        }
1340

    
1341
        {
1342
            int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1343
            ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
1344
            ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
1345
            ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
1346
            ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
1347
        }
1348
    }
1349

    
1350
    if(h->slice_type_nos == FF_B_TYPE && h->pps.cabac){
1351
        if(IS_8X8(mb_type)){
1352
            uint8_t *direct_table = &h->direct_table[b8_xy];
1353
            direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
1354
            direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
1355
            direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1356
        }
1357
    }
1358
}
1359

    
1360
/**
1361
 * Decodes a network abstraction layer unit.
1362
 * @param consumed is the number of bytes used as input
1363
 * @param length is the length of the array
1364
 * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
1365
 * @returns decoded bytes, might be src+1 if no escapes
1366
 */
1367
static const uint8_t *decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
1368
    int i, si, di;
1369
    uint8_t *dst;
1370
    int bufidx;
1371

    
1372
//    src[0]&0x80;                //forbidden bit
1373
    h->nal_ref_idc= src[0]>>5;
1374
    h->nal_unit_type= src[0]&0x1F;
1375

    
1376
    src++; length--;
1377
#if 0
1378
    for(i=0; i<length; i++)
1379
        printf("%2X ", src[i]);
1380
#endif
1381

    
1382
#ifdef HAVE_FAST_UNALIGNED
1383
# ifdef HAVE_FAST_64BIT
1384
#   define RS 7
1385
    for(i=0; i+1<length; i+=9){
1386
        if(!((~*(uint64_t*)(src+i) & (*(uint64_t*)(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
1387
# else
1388
#   define RS 3
1389
    for(i=0; i+1<length; i+=5){
1390
        if(!((~*(uint32_t*)(src+i) & (*(uint32_t*)(src+i) - 0x01000101U)) & 0x80008080U))
1391
# endif
1392
            continue;
1393
        if(i>0 && !src[i]) i--;
1394
        while(src[i]) i++;
1395
#else
1396
#   define RS 0
1397
    for(i=0; i+1<length; i+=2){
1398
        if(src[i]) continue;
1399
        if(i>0 && src[i-1]==0) i--;
1400
#endif
1401
        if(i+2<length && src[i+1]==0 && src[i+2]<=3){
1402
            if(src[i+2]!=3){
1403
                /* startcode, so we must be past the end */
1404
                length=i;
1405
            }
1406
            break;
1407
        }
1408
        i-= RS;
1409
    }
1410

    
1411
    if(i>=length-1){ //no escaped 0
1412
        *dst_length= length;
1413
        *consumed= length+1; //+1 for the header
1414
        return src;
1415
    }
1416

    
1417
    bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
1418
    h->rbsp_buffer[bufidx]= av_fast_realloc(h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
1419
    dst= h->rbsp_buffer[bufidx];
1420

    
1421
    if (dst == NULL){
1422
        return NULL;
1423
    }
1424

    
1425
//printf("decoding esc\n");
1426
    memcpy(dst, src, i);
1427
    si=di=i;
1428
    while(si+2<length){
1429
        //remove escapes (very rare 1:2^22)
1430
        if(src[si+2]>3){
1431
            dst[di++]= src[si++];
1432
            dst[di++]= src[si++];
1433
        }else if(src[si]==0 && src[si+1]==0){
1434
            if(src[si+2]==3){ //escape
1435
                dst[di++]= 0;
1436
                dst[di++]= 0;
1437
                si+=3;
1438
                continue;
1439
            }else //next start code
1440
                goto nsc;
1441
        }
1442

    
1443
        dst[di++]= src[si++];
1444
    }
1445
    while(si<length)
1446
        dst[di++]= src[si++];
1447
nsc:
1448

    
1449
    memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1450

    
1451
    *dst_length= di;
1452
    *consumed= si + 1;//+1 for the header
1453
//FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
1454
    return dst;
1455
}
1456

    
1457
/**
1458
 * identifies the exact end of the bitstream
1459
 * @return the length of the trailing, or 0 if damaged
1460
 */
1461
static int decode_rbsp_trailing(H264Context *h, const uint8_t *src){
1462
    int v= *src;
1463
    int r;
1464

    
1465
    tprintf(h->s.avctx, "rbsp trailing %X\n", v);
1466

    
1467
    for(r=1; r<9; r++){
1468
        if(v&1) return r;
1469
        v>>=1;
1470
    }
1471
    return 0;
1472
}
1473

    
1474
/**
1475
 * IDCT transforms the 16 dc values and dequantizes them.
1476
 * @param qp quantization parameter
1477
 */
1478
static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1479
#define stride 16
1480
    int i;
1481
    int temp[16]; //FIXME check if this is a good idea
1482
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1483
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1484

    
1485
//memset(block, 64, 2*256);
1486
//return;
1487
    for(i=0; i<4; i++){
1488
        const int offset= y_offset[i];
1489
        const int z0= block[offset+stride*0] + block[offset+stride*4];
1490
        const int z1= block[offset+stride*0] - block[offset+stride*4];
1491
        const int z2= block[offset+stride*1] - block[offset+stride*5];
1492
        const int z3= block[offset+stride*1] + block[offset+stride*5];
1493

    
1494
        temp[4*i+0]= z0+z3;
1495
        temp[4*i+1]= z1+z2;
1496
        temp[4*i+2]= z1-z2;
1497
        temp[4*i+3]= z0-z3;
1498
    }
1499

    
1500
    for(i=0; i<4; i++){
1501
        const int offset= x_offset[i];
1502
        const int z0= temp[4*0+i] + temp[4*2+i];
1503
        const int z1= temp[4*0+i] - temp[4*2+i];
1504
        const int z2= temp[4*1+i] - temp[4*3+i];
1505
        const int z3= temp[4*1+i] + temp[4*3+i];
1506

    
1507
        block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
1508
        block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
1509
        block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
1510
        block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
1511
    }
1512
}
1513

    
1514
#if 0
1515
/**
1516
 * DCT transforms the 16 dc values.
1517
 * @param qp quantization parameter ??? FIXME
1518
 */
1519
static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
1520
//    const int qmul= dequant_coeff[qp][0];
1521
    int i;
1522
    int temp[16]; //FIXME check if this is a good idea
1523
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1524
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1525

1526
    for(i=0; i<4; i++){
1527
        const int offset= y_offset[i];
1528
        const int z0= block[offset+stride*0] + block[offset+stride*4];
1529
        const int z1= block[offset+stride*0] - block[offset+stride*4];
1530
        const int z2= block[offset+stride*1] - block[offset+stride*5];
1531
        const int z3= block[offset+stride*1] + block[offset+stride*5];
1532

1533
        temp[4*i+0]= z0+z3;
1534
        temp[4*i+1]= z1+z2;
1535
        temp[4*i+2]= z1-z2;
1536
        temp[4*i+3]= z0-z3;
1537
    }
1538

1539
    for(i=0; i<4; i++){
1540
        const int offset= x_offset[i];
1541
        const int z0= temp[4*0+i] + temp[4*2+i];
1542
        const int z1= temp[4*0+i] - temp[4*2+i];
1543
        const int z2= temp[4*1+i] - temp[4*3+i];
1544
        const int z3= temp[4*1+i] + temp[4*3+i];
1545

1546
        block[stride*0 +offset]= (z0 + z3)>>1;
1547
        block[stride*2 +offset]= (z1 + z2)>>1;
1548
        block[stride*8 +offset]= (z1 - z2)>>1;
1549
        block[stride*10+offset]= (z0 - z3)>>1;
1550
    }
1551
}
1552
#endif
1553

    
1554
#undef xStride
1555
#undef stride
1556

    
1557
static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1558
    const int stride= 16*2;
1559
    const int xStride= 16;
1560
    int a,b,c,d,e;
1561

    
1562
    a= block[stride*0 + xStride*0];
1563
    b= block[stride*0 + xStride*1];
1564
    c= block[stride*1 + xStride*0];
1565
    d= block[stride*1 + xStride*1];
1566

    
1567
    e= a-b;
1568
    a= a+b;
1569
    b= c-d;
1570
    c= c+d;
1571

    
1572
    block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
1573
    block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
1574
    block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
1575
    block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
1576
}
1577

    
1578
#if 0
1579
static void chroma_dc_dct_c(DCTELEM *block){
1580
    const int stride= 16*2;
1581
    const int xStride= 16;
1582
    int a,b,c,d,e;
1583

1584
    a= block[stride*0 + xStride*0];
1585
    b= block[stride*0 + xStride*1];
1586
    c= block[stride*1 + xStride*0];
1587
    d= block[stride*1 + xStride*1];
1588

1589
    e= a-b;
1590
    a= a+b;
1591
    b= c-d;
1592
    c= c+d;
1593

1594
    block[stride*0 + xStride*0]= (a+c);
1595
    block[stride*0 + xStride*1]= (e+b);
1596
    block[stride*1 + xStride*0]= (a-c);
1597
    block[stride*1 + xStride*1]= (e-b);
1598
}
1599
#endif
1600

    
1601
/**
1602
 * gets the chroma qp.
1603
 */
1604
static inline int get_chroma_qp(H264Context *h, int t, int qscale){
1605
    return h->pps.chroma_qp_table[t][qscale];
1606
}
1607

    
1608
static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
1609
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1610
                           int src_x_offset, int src_y_offset,
1611
                           qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
1612
    MpegEncContext * const s = &h->s;
1613
    const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
1614
    int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
1615
    const int luma_xy= (mx&3) + ((my&3)<<2);
1616
    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
1617
    uint8_t * src_cb, * src_cr;
1618
    int extra_width= h->emu_edge_width;
1619
    int extra_height= h->emu_edge_height;
1620
    int emu=0;
1621
    const int full_mx= mx>>2;
1622
    const int full_my= my>>2;
1623
    const int pic_width  = 16*s->mb_width;
1624
    const int pic_height = 16*s->mb_height >> MB_FIELD;
1625

    
1626
    if(mx&7) extra_width -= 3;
1627
    if(my&7) extra_height -= 3;
1628

    
1629
    if(   full_mx < 0-extra_width
1630
       || full_my < 0-extra_height
1631
       || full_mx + 16/*FIXME*/ > pic_width + extra_width
1632
       || full_my + 16/*FIXME*/ > pic_height + extra_height){
1633
        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);
1634
            src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
1635
        emu=1;
1636
    }
1637

    
1638
    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
1639
    if(!square){
1640
        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
1641
    }
1642

    
1643
    if(ENABLE_GRAY && s->flags&CODEC_FLAG_GRAY) return;
1644

    
1645
    if(MB_FIELD){
1646
        // chroma offset when predicting from a field of opposite parity
1647
        my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
1648
        emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
1649
    }
1650
    src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1651
    src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1652

    
1653
    if(emu){
1654
        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);
1655
            src_cb= s->edge_emu_buffer;
1656
    }
1657
    chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1658

    
1659
    if(emu){
1660
        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);
1661
            src_cr= s->edge_emu_buffer;
1662
    }
1663
    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1664
}
1665

    
1666
static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
1667
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1668
                           int x_offset, int y_offset,
1669
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1670
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1671
                           int list0, int list1){
1672
    MpegEncContext * const s = &h->s;
1673
    qpel_mc_func *qpix_op=  qpix_put;
1674
    h264_chroma_mc_func chroma_op= chroma_put;
1675

    
1676
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1677
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1678
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1679
    x_offset += 8*s->mb_x;
1680
    y_offset += 8*(s->mb_y >> MB_FIELD);
1681

    
1682
    if(list0){
1683
        Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
1684
        mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
1685
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
1686
                           qpix_op, chroma_op);
1687

    
1688
        qpix_op=  qpix_avg;
1689
        chroma_op= chroma_avg;
1690
    }
1691

    
1692
    if(list1){
1693
        Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
1694
        mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
1695
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
1696
                           qpix_op, chroma_op);
1697
    }
1698
}
1699

    
1700
static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
1701
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1702
                           int x_offset, int y_offset,
1703
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1704
                           h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
1705
                           h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
1706
                           int list0, int list1){
1707
    MpegEncContext * const s = &h->s;
1708

    
1709
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1710
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1711
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1712
    x_offset += 8*s->mb_x;
1713
    y_offset += 8*(s->mb_y >> MB_FIELD);
1714

    
1715
    if(list0 && list1){
1716
        /* don't optimize for luma-only case, since B-frames usually
1717
         * use implicit weights => chroma too. */
1718
        uint8_t *tmp_cb = s->obmc_scratchpad;
1719
        uint8_t *tmp_cr = s->obmc_scratchpad + 8;
1720
        uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
1721
        int refn0 = h->ref_cache[0][ scan8[n] ];
1722
        int refn1 = h->ref_cache[1][ scan8[n] ];
1723

    
1724
        mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
1725
                    dest_y, dest_cb, dest_cr,
1726
                    x_offset, y_offset, qpix_put, chroma_put);
1727
        mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
1728
                    tmp_y, tmp_cb, tmp_cr,
1729
                    x_offset, y_offset, qpix_put, chroma_put);
1730

    
1731
        if(h->use_weight == 2){
1732
            int weight0 = h->implicit_weight[refn0][refn1];
1733
            int weight1 = 64 - weight0;
1734
            luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
1735
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
1736
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
1737
        }else{
1738
            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
1739
                            h->luma_weight[0][refn0], h->luma_weight[1][refn1],
1740
                            h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
1741
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1742
                            h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
1743
                            h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
1744
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1745
                            h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
1746
                            h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
1747
        }
1748
    }else{
1749
        int list = list1 ? 1 : 0;
1750
        int refn = h->ref_cache[list][ scan8[n] ];
1751
        Picture *ref= &h->ref_list[list][refn];
1752
        mc_dir_part(h, ref, n, square, chroma_height, delta, list,
1753
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
1754
                    qpix_put, chroma_put);
1755

    
1756
        luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
1757
                       h->luma_weight[list][refn], h->luma_offset[list][refn]);
1758
        if(h->use_weight_chroma){
1759
            chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1760
                             h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
1761
            chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1762
                             h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
1763
        }
1764
    }
1765
}
1766

    
1767
static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
1768
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1769
                           int x_offset, int y_offset,
1770
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1771
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1772
                           h264_weight_func *weight_op, h264_biweight_func *weight_avg,
1773
                           int list0, int list1){
1774
    if((h->use_weight==2 && list0 && list1
1775
        && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
1776
       || h->use_weight==1)
1777
        mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1778
                         x_offset, y_offset, qpix_put, chroma_put,
1779
                         weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
1780
    else
1781
        mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1782
                    x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
1783
}
1784

    
1785
static inline void prefetch_motion(H264Context *h, int list){
1786
    /* fetch pixels for estimated mv 4 macroblocks ahead
1787
     * optimized for 64byte cache lines */
1788
    MpegEncContext * const s = &h->s;
1789
    const int refn = h->ref_cache[list][scan8[0]];
1790
    if(refn >= 0){
1791
        const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
1792
        const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
1793
        uint8_t **src= h->ref_list[list][refn].data;
1794
        int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
1795
        s->dsp.prefetch(src[0]+off, s->linesize, 4);
1796
        off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
1797
        s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
1798
    }
1799
}
1800

    
1801
static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1802
                      qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
1803
                      qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
1804
                      h264_weight_func *weight_op, h264_biweight_func *weight_avg){
1805
    MpegEncContext * const s = &h->s;
1806
    const int mb_xy= h->mb_xy;
1807
    const int mb_type= s->current_picture.mb_type[mb_xy];
1808

    
1809
    assert(IS_INTER(mb_type));
1810

    
1811
    prefetch_motion(h, 0);
1812

    
1813
    if(IS_16X16(mb_type)){
1814
        mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
1815
                qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
1816
                &weight_op[0], &weight_avg[0],
1817
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1818
    }else if(IS_16X8(mb_type)){
1819
        mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
1820
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1821
                &weight_op[1], &weight_avg[1],
1822
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1823
        mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
1824
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1825
                &weight_op[1], &weight_avg[1],
1826
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1827
    }else if(IS_8X16(mb_type)){
1828
        mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
1829
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1830
                &weight_op[2], &weight_avg[2],
1831
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1832
        mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
1833
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1834
                &weight_op[2], &weight_avg[2],
1835
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1836
    }else{
1837
        int i;
1838

    
1839
        assert(IS_8X8(mb_type));
1840

    
1841
        for(i=0; i<4; i++){
1842
            const int sub_mb_type= h->sub_mb_type[i];
1843
            const int n= 4*i;
1844
            int x_offset= (i&1)<<2;
1845
            int y_offset= (i&2)<<1;
1846

    
1847
            if(IS_SUB_8X8(sub_mb_type)){
1848
                mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1849
                    qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1850
                    &weight_op[3], &weight_avg[3],
1851
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1852
            }else if(IS_SUB_8X4(sub_mb_type)){
1853
                mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1854
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1855
                    &weight_op[4], &weight_avg[4],
1856
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1857
                mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
1858
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1859
                    &weight_op[4], &weight_avg[4],
1860
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1861
            }else if(IS_SUB_4X8(sub_mb_type)){
1862
                mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1863
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1864
                    &weight_op[5], &weight_avg[5],
1865
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1866
                mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
1867
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1868
                    &weight_op[5], &weight_avg[5],
1869
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1870
            }else{
1871
                int j;
1872
                assert(IS_SUB_4X4(sub_mb_type));
1873
                for(j=0; j<4; j++){
1874
                    int sub_x_offset= x_offset + 2*(j&1);
1875
                    int sub_y_offset= y_offset +   (j&2);
1876
                    mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
1877
                        qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1878
                        &weight_op[6], &weight_avg[6],
1879
                        IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1880
                }
1881
            }
1882
        }
1883
    }
1884

    
1885
    prefetch_motion(h, 1);
1886
}
1887

    
1888
static av_cold void init_cavlc_level_tab(void){
1889
    int suffix_length, mask;
1890
    unsigned int i;
1891

    
1892
    for(suffix_length=0; suffix_length<7; suffix_length++){
1893
        for(i=0; i<(1<<LEVEL_TAB_BITS); i++){
1894
            int prefix= LEVEL_TAB_BITS - av_log2(2*i);
1895
            int level_code= (prefix<<suffix_length) + (i>>(LEVEL_TAB_BITS-prefix-1-suffix_length)) - (1<<suffix_length);
1896

    
1897
            mask= -(level_code&1);
1898
            level_code= (((2+level_code)>>1) ^ mask) - mask;
1899
            if(prefix + 1 + suffix_length <= LEVEL_TAB_BITS){
1900
                cavlc_level_tab[suffix_length][i][0]= level_code;
1901
                cavlc_level_tab[suffix_length][i][1]= prefix + 1 + suffix_length;
1902
            }else if(prefix + 1 <= LEVEL_TAB_BITS){
1903
                cavlc_level_tab[suffix_length][i][0]= prefix+100;
1904
                cavlc_level_tab[suffix_length][i][1]= prefix + 1;
1905
            }else{
1906
                cavlc_level_tab[suffix_length][i][0]= LEVEL_TAB_BITS+100;
1907
                cavlc_level_tab[suffix_length][i][1]= LEVEL_TAB_BITS;
1908
            }
1909
        }
1910
    }
1911
}
1912

    
1913
static av_cold void decode_init_vlc(void){
1914
    static int done = 0;
1915

    
1916
    if (!done) {
1917
        int i;
1918
        int offset;
1919
        done = 1;
1920

    
1921
        chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table;
1922
        chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size;
1923
        init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
1924
                 &chroma_dc_coeff_token_len [0], 1, 1,
1925
                 &chroma_dc_coeff_token_bits[0], 1, 1,
1926
                 INIT_VLC_USE_NEW_STATIC);
1927

    
1928
        offset = 0;
1929
        for(i=0; i<4; i++){
1930
            coeff_token_vlc[i].table = coeff_token_vlc_tables+offset;
1931
            coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i];
1932
            init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
1933
                     &coeff_token_len [i][0], 1, 1,
1934
                     &coeff_token_bits[i][0], 1, 1,
1935
                     INIT_VLC_USE_NEW_STATIC);
1936
            offset += coeff_token_vlc_tables_size[i];
1937
        }
1938
        /*
1939
         * This is a one time safety check to make sure that
1940
         * the packed static coeff_token_vlc table sizes
1941
         * were initialized correctly.
1942
         */
1943
        assert(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));
1944

    
1945
        for(i=0; i<3; i++){
1946
            chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i];
1947
            chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size;
1948
            init_vlc(&chroma_dc_total_zeros_vlc[i],
1949
                     CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
1950
                     &chroma_dc_total_zeros_len [i][0], 1, 1,
1951
                     &chroma_dc_total_zeros_bits[i][0], 1, 1,
1952
                     INIT_VLC_USE_NEW_STATIC);
1953
        }
1954
        for(i=0; i<15; i++){
1955
            total_zeros_vlc[i].table = total_zeros_vlc_tables[i];
1956
            total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size;
1957
            init_vlc(&total_zeros_vlc[i],
1958
                     TOTAL_ZEROS_VLC_BITS, 16,
1959
                     &total_zeros_len [i][0], 1, 1,
1960
                     &total_zeros_bits[i][0], 1, 1,
1961
                     INIT_VLC_USE_NEW_STATIC);
1962
        }
1963

    
1964
        for(i=0; i<6; i++){
1965
            run_vlc[i].table = run_vlc_tables[i];
1966
            run_vlc[i].table_allocated = run_vlc_tables_size;
1967
            init_vlc(&run_vlc[i],
1968
                     RUN_VLC_BITS, 7,
1969
                     &run_len [i][0], 1, 1,
1970
                     &run_bits[i][0], 1, 1,
1971
                     INIT_VLC_USE_NEW_STATIC);
1972
        }
1973
        run7_vlc.table = run7_vlc_table,
1974
        run7_vlc.table_allocated = run7_vlc_table_size;
1975
        init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
1976
                 &run_len [6][0], 1, 1,
1977
                 &run_bits[6][0], 1, 1,
1978
                 INIT_VLC_USE_NEW_STATIC);
1979

    
1980
        init_cavlc_level_tab();
1981
    }
1982
}
1983

    
1984
static void free_tables(H264Context *h){
1985
    int i;
1986
    H264Context *hx;
1987
    av_freep(&h->intra4x4_pred_mode);
1988
    av_freep(&h->chroma_pred_mode_table);
1989
    av_freep(&h->cbp_table);
1990
    av_freep(&h->mvd_table[0]);
1991
    av_freep(&h->mvd_table[1]);
1992
    av_freep(&h->direct_table);
1993
    av_freep(&h->non_zero_count);
1994
    av_freep(&h->slice_table_base);
1995
    h->slice_table= NULL;
1996

    
1997
    av_freep(&h->mb2b_xy);
1998
    av_freep(&h->mb2b8_xy);
1999

    
2000
    for(i = 0; i < h->s.avctx->thread_count; i++) {
2001
        hx = h->thread_context[i];
2002
        if(!hx) continue;
2003
        av_freep(&hx->top_borders[1]);
2004
        av_freep(&hx->top_borders[0]);
2005
        av_freep(&hx->s.obmc_scratchpad);
2006
    }
2007
}
2008

    
2009
static void init_dequant8_coeff_table(H264Context *h){
2010
    int i,q,x;
2011
    const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
2012
    h->dequant8_coeff[0] = h->dequant8_buffer[0];
2013
    h->dequant8_coeff[1] = h->dequant8_buffer[1];
2014

    
2015
    for(i=0; i<2; i++ ){
2016
        if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
2017
            h->dequant8_coeff[1] = h->dequant8_buffer[0];
2018
            break;
2019
        }
2020

    
2021
        for(q=0; q<52; q++){
2022
            int shift = div6[q];
2023
            int idx = rem6[q];
2024
            for(x=0; x<64; x++)
2025
                h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
2026
                    ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
2027
                    h->pps.scaling_matrix8[i][x]) << shift;
2028
        }
2029
    }
2030
}
2031

    
2032
static void init_dequant4_coeff_table(H264Context *h){
2033
    int i,j,q,x;
2034
    const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
2035
    for(i=0; i<6; i++ ){
2036
        h->dequant4_coeff[i] = h->dequant4_buffer[i];
2037
        for(j=0; j<i; j++){
2038
            if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
2039
                h->dequant4_coeff[i] = h->dequant4_buffer[j];
2040
                break;
2041
            }
2042
        }
2043
        if(j<i)
2044
            continue;
2045

    
2046
        for(q=0; q<52; q++){
2047
            int shift = div6[q] + 2;
2048
            int idx = rem6[q];
2049
            for(x=0; x<16; x++)
2050
                h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
2051
                    ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
2052
                    h->pps.scaling_matrix4[i][x]) << shift;
2053
        }
2054
    }
2055
}
2056

    
2057
static void init_dequant_tables(H264Context *h){
2058
    int i,x;
2059
    init_dequant4_coeff_table(h);
2060
    if(h->pps.transform_8x8_mode)
2061
        init_dequant8_coeff_table(h);
2062
    if(h->sps.transform_bypass){
2063
        for(i=0; i<6; i++)
2064
            for(x=0; x<16; x++)
2065
                h->dequant4_coeff[i][0][x] = 1<<6;
2066
        if(h->pps.transform_8x8_mode)
2067
            for(i=0; i<2; i++)
2068
                for(x=0; x<64; x++)
2069
                    h->dequant8_coeff[i][0][x] = 1<<6;
2070
    }
2071
}
2072

    
2073

    
2074
/**
2075
 * allocates tables.
2076
 * needs width/height
2077
 */
2078
static int alloc_tables(H264Context *h){
2079
    MpegEncContext * const s = &h->s;
2080
    const int big_mb_num= s->mb_stride * (s->mb_height+1);
2081
    int x,y;
2082

    
2083
    CHECKED_ALLOCZ(h->intra4x4_pred_mode, big_mb_num * 8  * sizeof(uint8_t))
2084

    
2085
    CHECKED_ALLOCZ(h->non_zero_count    , big_mb_num * 16 * sizeof(uint8_t))
2086
    CHECKED_ALLOCZ(h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base))
2087
    CHECKED_ALLOCZ(h->cbp_table, big_mb_num * sizeof(uint16_t))
2088

    
2089
    CHECKED_ALLOCZ(h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t))
2090
    CHECKED_ALLOCZ(h->mvd_table[0], 32*big_mb_num * sizeof(uint16_t));
2091
    CHECKED_ALLOCZ(h->mvd_table[1], 32*big_mb_num * sizeof(uint16_t));
2092
    CHECKED_ALLOCZ(h->direct_table, 32*big_mb_num * sizeof(uint8_t));
2093

    
2094
    memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
2095
    h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
2096

    
2097
    CHECKED_ALLOCZ(h->mb2b_xy  , big_mb_num * sizeof(uint32_t));
2098
    CHECKED_ALLOCZ(h->mb2b8_xy , big_mb_num * sizeof(uint32_t));
2099
    for(y=0; y<s->mb_height; y++){
2100
        for(x=0; x<s->mb_width; x++){
2101
            const int mb_xy= x + y*s->mb_stride;
2102
            const int b_xy = 4*x + 4*y*h->b_stride;
2103
            const int b8_xy= 2*x + 2*y*h->b8_stride;
2104

    
2105
            h->mb2b_xy [mb_xy]= b_xy;
2106
            h->mb2b8_xy[mb_xy]= b8_xy;
2107
        }
2108
    }
2109

    
2110
    s->obmc_scratchpad = NULL;
2111

    
2112
    if(!h->dequant4_coeff[0])
2113
        init_dequant_tables(h);
2114

    
2115
    return 0;
2116
fail:
2117
    free_tables(h);
2118
    return -1;
2119
}
2120

    
2121
/**
2122
 * Mimic alloc_tables(), but for every context thread.
2123
 */
2124
static void clone_tables(H264Context *dst, H264Context *src){
2125
    dst->intra4x4_pred_mode       = src->intra4x4_pred_mode;
2126
    dst->non_zero_count           = src->non_zero_count;
2127
    dst->slice_table              = src->slice_table;
2128
    dst->cbp_table                = src->cbp_table;
2129
    dst->mb2b_xy                  = src->mb2b_xy;
2130
    dst->mb2b8_xy                 = src->mb2b8_xy;
2131
    dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
2132
    dst->mvd_table[0]             = src->mvd_table[0];
2133
    dst->mvd_table[1]             = src->mvd_table[1];
2134
    dst->direct_table             = src->direct_table;
2135

    
2136
    dst->s.obmc_scratchpad = NULL;
2137
    ff_h264_pred_init(&dst->hpc, src->s.codec_id);
2138
}
2139

    
2140
/**
2141
 * Init context
2142
 * Allocate buffers which are not shared amongst multiple threads.
2143
 */
2144
static int context_init(H264Context *h){
2145
    CHECKED_ALLOCZ(h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2146
    CHECKED_ALLOCZ(h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2147

    
2148
    return 0;
2149
fail:
2150
    return -1; // free_tables will clean up for us
2151
}
2152

    
2153
static av_cold void common_init(H264Context *h){
2154
    MpegEncContext * const s = &h->s;
2155

    
2156
    s->width = s->avctx->width;
2157
    s->height = s->avctx->height;
2158
    s->codec_id= s->avctx->codec->id;
2159

    
2160
    ff_h264_pred_init(&h->hpc, s->codec_id);
2161

    
2162
    h->dequant_coeff_pps= -1;
2163
    s->unrestricted_mv=1;
2164
    s->decode=1; //FIXME
2165

    
2166
    dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
2167

    
2168
    memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
2169
    memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
2170
}
2171

    
2172
static av_cold int decode_init(AVCodecContext *avctx){
2173
    H264Context *h= avctx->priv_data;
2174
    MpegEncContext * const s = &h->s;
2175

    
2176
    MPV_decode_defaults(s);
2177

    
2178
    s->avctx = avctx;
2179
    common_init(h);
2180

    
2181
    s->out_format = FMT_H264;
2182
    s->workaround_bugs= avctx->workaround_bugs;
2183

    
2184
    // set defaults
2185
//    s->decode_mb= ff_h263_decode_mb;
2186
    s->quarter_sample = 1;
2187
    s->low_delay= 1;
2188

    
2189
    if(avctx->codec_id == CODEC_ID_SVQ3)
2190
        avctx->pix_fmt= PIX_FMT_YUVJ420P;
2191
    else
2192
        avctx->pix_fmt= PIX_FMT_YUV420P;
2193

    
2194
    decode_init_vlc();
2195

    
2196
    if(avctx->extradata_size > 0 && avctx->extradata &&
2197
       *(char *)avctx->extradata == 1){
2198
        h->is_avc = 1;
2199
        h->got_avcC = 0;
2200
    } else {
2201
        h->is_avc = 0;
2202
    }
2203

    
2204
    h->thread_context[0] = h;
2205
    h->outputed_poc = INT_MIN;
2206
    h->prev_poc_msb= 1<<16;
2207
    return 0;
2208
}
2209

    
2210
static int frame_start(H264Context *h){
2211
    MpegEncContext * const s = &h->s;
2212
    int i;
2213

    
2214
    if(MPV_frame_start(s, s->avctx) < 0)
2215
        return -1;
2216
    ff_er_frame_start(s);
2217
    /*
2218
     * MPV_frame_start uses pict_type to derive key_frame.
2219
     * This is incorrect for H.264; IDR markings must be used.
2220
     * Zero here; IDR markings per slice in frame or fields are ORed in later.
2221
     * See decode_nal_units().
2222
     */
2223
    s->current_picture_ptr->key_frame= 0;
2224

    
2225
    assert(s->linesize && s->uvlinesize);
2226

    
2227
    for(i=0; i<16; i++){
2228
        h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
2229
        h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
2230
    }
2231
    for(i=0; i<4; i++){
2232
        h->block_offset[16+i]=
2233
        h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2234
        h->block_offset[24+16+i]=
2235
        h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2236
    }
2237

    
2238
    /* can't be in alloc_tables because linesize isn't known there.
2239
     * FIXME: redo bipred weight to not require extra buffer? */
2240
    for(i = 0; i < s->avctx->thread_count; i++)
2241
        if(!h->thread_context[i]->s.obmc_scratchpad)
2242
            h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
2243

    
2244
    /* some macroblocks will be accessed before they're available */
2245
    if(FRAME_MBAFF || s->avctx->thread_count > 1)
2246
        memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
2247

    
2248
//    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
2249

    
2250
    // We mark the current picture as non-reference after allocating it, so
2251
    // that if we break out due to an error it can be released automatically
2252
    // in the next MPV_frame_start().
2253
    // SVQ3 as well as most other codecs have only last/next/current and thus
2254
    // get released even with set reference, besides SVQ3 and others do not
2255
    // mark frames as reference later "naturally".
2256
    if(s->codec_id != CODEC_ID_SVQ3)
2257
        s->current_picture_ptr->reference= 0;
2258

    
2259
    s->current_picture_ptr->field_poc[0]=
2260
    s->current_picture_ptr->field_poc[1]= INT_MAX;
2261
    assert(s->current_picture_ptr->long_ref==0);
2262

    
2263
    return 0;
2264
}
2265

    
2266
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){
2267
    MpegEncContext * const s = &h->s;
2268
    int i;
2269
    int step    = 1;
2270
    int offset  = 1;
2271
    int uvoffset= 1;
2272
    int top_idx = 1;
2273
    int skiplast= 0;
2274

    
2275
    src_y  -=   linesize;
2276
    src_cb -= uvlinesize;
2277
    src_cr -= uvlinesize;
2278

    
2279
    if(!simple && FRAME_MBAFF){
2280
        if(s->mb_y&1){
2281
            offset  = MB_MBAFF ? 1 : 17;
2282
            uvoffset= MB_MBAFF ? 1 : 9;
2283
            if(!MB_MBAFF){
2284
                *(uint64_t*)(h->top_borders[0][s->mb_x]+ 0)= *(uint64_t*)(src_y +  15*linesize);
2285
                *(uint64_t*)(h->top_borders[0][s->mb_x]+ 8)= *(uint64_t*)(src_y +8+15*linesize);
2286
                if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2287
                    *(uint64_t*)(h->top_borders[0][s->mb_x]+16)= *(uint64_t*)(src_cb+7*uvlinesize);
2288
                    *(uint64_t*)(h->top_borders[0][s->mb_x]+24)= *(uint64_t*)(src_cr+7*uvlinesize);
2289
                }
2290
            }
2291
        }else{
2292
            if(!MB_MBAFF){
2293
                h->left_border[0]= h->top_borders[0][s->mb_x][15];
2294
                if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2295
                    h->left_border[34   ]= h->top_borders[0][s->mb_x][16+7  ];
2296
                    h->left_border[34+18]= h->top_borders[0][s->mb_x][16+8+7];
2297
                }
2298
                skiplast= 1;
2299
            }
2300
            offset  =
2301
            uvoffset=
2302
            top_idx = MB_MBAFF ? 0 : 1;
2303
        }
2304
        step= MB_MBAFF ? 2 : 1;
2305
    }
2306

    
2307
    // There are two lines saved, the line above the the top macroblock of a pair,
2308
    // and the line above the bottom macroblock
2309
    h->left_border[offset]= h->top_borders[top_idx][s->mb_x][15];
2310
    for(i=1; i<17 - skiplast; i++){
2311
        h->left_border[offset+i*step]= src_y[15+i*  linesize];
2312
    }
2313

    
2314
    *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0)= *(uint64_t*)(src_y +  16*linesize);
2315
    *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8)= *(uint64_t*)(src_y +8+16*linesize);
2316

    
2317
    if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2318
        h->left_border[uvoffset+34   ]= h->top_borders[top_idx][s->mb_x][16+7];
2319
        h->left_border[uvoffset+34+18]= h->top_borders[top_idx][s->mb_x][24+7];
2320
        for(i=1; i<9 - skiplast; i++){
2321
            h->left_border[uvoffset+34   +i*step]= src_cb[7+i*uvlinesize];
2322
            h->left_border[uvoffset+34+18+i*step]= src_cr[7+i*uvlinesize];
2323
        }
2324
        *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16)= *(uint64_t*)(src_cb+8*uvlinesize);
2325
        *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24)= *(uint64_t*)(src_cr+8*uvlinesize);
2326
    }
2327
}
2328

    
2329
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){
2330
    MpegEncContext * const s = &h->s;
2331
    int temp8, i;
2332
    uint64_t temp64;
2333
    int deblock_left;
2334
    int deblock_top;
2335
    int mb_xy;
2336
    int step    = 1;
2337
    int offset  = 1;
2338
    int uvoffset= 1;
2339
    int top_idx = 1;
2340

    
2341
    if(!simple && FRAME_MBAFF){
2342
        if(s->mb_y&1){
2343
            offset  = MB_MBAFF ? 1 : 17;
2344
            uvoffset= MB_MBAFF ? 1 : 9;
2345
        }else{
2346
            offset  =
2347
            uvoffset=
2348
            top_idx = MB_MBAFF ? 0 : 1;
2349
        }
2350
        step= MB_MBAFF ? 2 : 1;
2351
    }
2352

    
2353
    if(h->deblocking_filter == 2) {
2354
        mb_xy = h->mb_xy;
2355
        deblock_left = h->slice_table[mb_xy] == h->slice_table[mb_xy - 1];
2356
        deblock_top  = h->slice_table[mb_xy] == h->slice_table[h->top_mb_xy];
2357
    } else {
2358
        deblock_left = (s->mb_x > 0);
2359
        deblock_top =  (s->mb_y > !!MB_FIELD);
2360
    }
2361

    
2362
    src_y  -=   linesize + 1;
2363
    src_cb -= uvlinesize + 1;
2364
    src_cr -= uvlinesize + 1;
2365

    
2366
#define XCHG(a,b,t,xchg)\
2367
t= a;\
2368
if(xchg)\
2369
    a= b;\
2370
b= t;
2371

    
2372
    if(deblock_left){
2373
        for(i = !deblock_top; i<16; i++){
2374
            XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, xchg);
2375
        }
2376
        XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, 1);
2377
    }
2378

    
2379
    if(deblock_top){
2380
        XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0), *(uint64_t*)(src_y +1), temp64, xchg);
2381
        XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8), *(uint64_t*)(src_y +9), temp64, 1);
2382
        if(s->mb_x+1 < s->mb_width){
2383
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x+1]), *(uint64_t*)(src_y +17), temp64, 1);
2384
        }
2385
    }
2386

    
2387
    if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2388
        if(deblock_left){
2389
            for(i = !deblock_top; i<8; i++){
2390
                XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, xchg);
2391
                XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, xchg);
2392
            }
2393
            XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, 1);
2394
            XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, 1);
2395
        }
2396
        if(deblock_top){
2397
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16), *(uint64_t*)(src_cb+1), temp64, 1);
2398
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24), *(uint64_t*)(src_cr+1), temp64, 1);
2399
        }
2400
    }
2401
}
2402

    
2403
static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
2404
    MpegEncContext * const s = &h->s;
2405
    const int mb_x= s->mb_x;
2406
    const int mb_y= s->mb_y;
2407
    const int mb_xy= h->mb_xy;
2408
    const int mb_type= s->current_picture.mb_type[mb_xy];
2409
    uint8_t  *dest_y, *dest_cb, *dest_cr;
2410
    int linesize, uvlinesize /*dct_offset*/;
2411
    int i;
2412
    int *block_offset = &h->block_offset[0];
2413
    const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
2414
    const int is_h264 = simple || s->codec_id == CODEC_ID_H264;
2415
    void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
2416
    void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
2417

    
2418
    dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2419
    dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2420
    dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2421

    
2422
    s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
2423
    s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
2424

    
2425
    if (!simple && MB_FIELD) {
2426
        linesize   = h->mb_linesize   = s->linesize * 2;
2427
        uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2428
        block_offset = &h->block_offset[24];
2429
        if(mb_y&1){ //FIXME move out of this function?
2430
            dest_y -= s->linesize*15;
2431
            dest_cb-= s->uvlinesize*7;
2432
            dest_cr-= s->uvlinesize*7;
2433
        }
2434
        if(FRAME_MBAFF) {
2435
            int list;
2436
            for(list=0; list<h->list_count; list++){
2437
                if(!USES_LIST(mb_type, list))
2438
                    continue;
2439
                if(IS_16X16(mb_type)){
2440
                    int8_t *ref = &h->ref_cache[list][scan8[0]];
2441
                    fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
2442
                }else{
2443
                    for(i=0; i<16; i+=4){
2444
                        int ref = h->ref_cache[list][scan8[i]];
2445
                        if(ref >= 0)
2446
                            fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
2447
                    }
2448
                }
2449
            }
2450
        }
2451
    } else {
2452
        linesize   = h->mb_linesize   = s->linesize;
2453
        uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2454
//        dct_offset = s->linesize * 16;
2455
    }
2456

    
2457
    if (!simple && IS_INTRA_PCM(mb_type)) {
2458
        for (i=0; i<16; i++) {
2459
            memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
2460
        }
2461
        for (i=0; i<8; i++) {
2462
            memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
2463
            memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
2464
        }
2465
    } else {
2466
        if(IS_INTRA(mb_type)){
2467
            if(h->deblocking_filter)
2468
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
2469

    
2470
            if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2471
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
2472
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
2473
            }
2474

    
2475
            if(IS_INTRA4x4(mb_type)){
2476
                if(simple || !s->encoding){
2477
                    if(IS_8x8DCT(mb_type)){
2478
                        if(transform_bypass){
2479
                            idct_dc_add =
2480
                            idct_add    = s->dsp.add_pixels8;
2481
                        }else{
2482
                            idct_dc_add = s->dsp.h264_idct8_dc_add;
2483
                            idct_add    = s->dsp.h264_idct8_add;
2484
                        }
2485
                        for(i=0; i<16; i+=4){
2486
                            uint8_t * const ptr= dest_y + block_offset[i];
2487
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2488
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
2489
                                h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
2490
                            }else{
2491
                                const int nnz = h->non_zero_count_cache[ scan8[i] ];
2492
                                h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
2493
                                                            (h->topright_samples_available<<i)&0x4000, linesize);
2494
                                if(nnz){
2495
                                    if(nnz == 1 && h->mb[i*16])
2496
                                        idct_dc_add(ptr, h->mb + i*16, linesize);
2497
                                    else
2498
                                        idct_add   (ptr, h->mb + i*16, linesize);
2499
                                }
2500
                            }
2501
                        }
2502
                    }else{
2503
                        if(transform_bypass){
2504
                            idct_dc_add =
2505
                            idct_add    = s->dsp.add_pixels4;
2506
                        }else{
2507
                            idct_dc_add = s->dsp.h264_idct_dc_add;
2508
                            idct_add    = s->dsp.h264_idct_add;
2509
                        }
2510
                        for(i=0; i<16; i++){
2511
                            uint8_t * const ptr= dest_y + block_offset[i];
2512
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2513

    
2514
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
2515
                                h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
2516
                            }else{
2517
                                uint8_t *topright;
2518
                                int nnz, tr;
2519
                                if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
2520
                                    const int topright_avail= (h->topright_samples_available<<i)&0x8000;
2521
                                    assert(mb_y || linesize <= block_offset[i]);
2522
                                    if(!topright_avail){
2523
                                        tr= ptr[3 - linesize]*0x01010101;
2524
                                        topright= (uint8_t*) &tr;
2525
                                    }else
2526
                                        topright= ptr + 4 - linesize;
2527
                                }else
2528
                                    topright= NULL;
2529

    
2530
                                h->hpc.pred4x4[ dir ](ptr, topright, linesize);
2531
                                nnz = h->non_zero_count_cache[ scan8[i] ];
2532
                                if(nnz){
2533
                                    if(is_h264){
2534
                                        if(nnz == 1 && h->mb[i*16])
2535
                                            idct_dc_add(ptr, h->mb + i*16, linesize);
2536
                                        else
2537
                                            idct_add   (ptr, h->mb + i*16, linesize);
2538
                                    }else
2539
                                        svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
2540
                                }
2541
                            }
2542
                        }
2543
                    }
2544
                }
2545
            }else{
2546
                h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
2547
                if(is_h264){
2548
                    if(!transform_bypass)
2549
                        h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
2550
                }else
2551
                    svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
2552
            }
2553
            if(h->deblocking_filter)
2554
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
2555
        }else if(is_h264){
2556
            hl_motion(h, dest_y, dest_cb, dest_cr,
2557
                      s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2558
                      s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2559
                      s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
2560
        }
2561

    
2562

    
2563
        if(!IS_INTRA4x4(mb_type)){
2564
            if(is_h264){
2565
                if(IS_INTRA16x16(mb_type)){
2566
                    if(transform_bypass){
2567
                        if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
2568
                            h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
2569
                        }else{
2570
                            for(i=0; i<16; i++){
2571
                                if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
2572
                                    s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
2573
                            }
2574
                        }
2575
                    }else{
2576
                         s->dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2577
                    }
2578
                }else if(h->cbp&15){
2579
                    if(transform_bypass){
2580
                        const int di = IS_8x8DCT(mb_type) ? 4 : 1;
2581
                        idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
2582
                        for(i=0; i<16; i+=di){
2583
                            if(h->non_zero_count_cache[ scan8[i] ]){
2584
                                idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2585
                            }
2586
                        }
2587
                    }else{
2588
                        if(IS_8x8DCT(mb_type)){
2589
                            s->dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2590
                        }else{
2591
                            s->dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2592
                        }
2593
                    }
2594
                }
2595
            }else{
2596
                for(i=0; i<16; i++){
2597
                    if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
2598
                        uint8_t * const ptr= dest_y + block_offset[i];
2599
                        svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
2600
                    }
2601
                }
2602
            }
2603
        }
2604

    
2605
        if((simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
2606
            uint8_t *dest[2] = {dest_cb, dest_cr};
2607
            if(transform_bypass){
2608
                if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
2609
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
2610
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
2611
                }else{
2612
                    idct_add = s->dsp.add_pixels4;
2613
                    for(i=16; i<16+8; i++){
2614
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
2615
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2616
                    }
2617
                }
2618
            }else{
2619
                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]);
2620
                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]);
2621
                if(is_h264){
2622
                    idct_add = s->dsp.h264_idct_add;
2623
                    idct_dc_add = s->dsp.h264_idct_dc_add;
2624
                    for(i=16; i<16+8; i++){
2625
                        if(h->non_zero_count_cache[ scan8[i] ])
2626
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2627
                        else if(h->mb[i*16])
2628
                            idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2629
                    }
2630
                }else{
2631
                    for(i=16; i<16+8; i++){
2632
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
2633
                            uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
2634
                            svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, chroma_qp[s->qscale + 12] - 12, 2);
2635
                        }
2636
                    }
2637
                }
2638
            }
2639
        }
2640
    }
2641
    if(h->cbp || IS_INTRA(mb_type))
2642
        s->dsp.clear_blocks(h->mb);
2643

    
2644
    if(h->deblocking_filter) {
2645
        backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, simple);
2646
        fill_caches(h, mb_type, 1); //FIXME don't fill stuff which isn't used by filter_mb
2647
        h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2648
        h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2649
        if (!simple && FRAME_MBAFF) {
2650
            filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2651
        } else {
2652
            filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2653
        }
2654
    }
2655
}
2656

    
2657
/**
2658
 * Process a macroblock; this case avoids checks for expensive uncommon cases.
2659
 */
2660
static void hl_decode_mb_simple(H264Context *h){
2661
    hl_decode_mb_internal(h, 1);
2662
}
2663

    
2664
/**
2665
 * Process a macroblock; this handles edge cases, such as interlacing.
2666
 */
2667
static void av_noinline hl_decode_mb_complex(H264Context *h){
2668
    hl_decode_mb_internal(h, 0);
2669
}
2670

    
2671
static void hl_decode_mb(H264Context *h){
2672
    MpegEncContext * const s = &h->s;
2673
    const int mb_xy= h->mb_xy;
2674
    const int mb_type= s->current_picture.mb_type[mb_xy];
2675
    int is_complex = ENABLE_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
2676

    
2677
    if(ENABLE_H264_ENCODER && !s->decode)
2678
        return;
2679

    
2680
    if (is_complex)
2681
        hl_decode_mb_complex(h);
2682
    else hl_decode_mb_simple(h);
2683
}
2684

    
2685
static void pic_as_field(Picture *pic, const int parity){
2686
    int i;
2687
    for (i = 0; i < 4; ++i) {
2688
        if (parity == PICT_BOTTOM_FIELD)
2689
            pic->data[i] += pic->linesize[i];
2690
        pic->reference = parity;
2691
        pic->linesize[i] *= 2;
2692
    }
2693
    pic->poc= pic->field_poc[parity == PICT_BOTTOM_FIELD];
2694
}
2695

    
2696
static int split_field_copy(Picture *dest, Picture *src,
2697
                            int parity, int id_add){
2698
    int match = !!(src->reference & parity);
2699

    
2700
    if (match) {
2701
        *dest = *src;
2702
        if(parity != PICT_FRAME){
2703
            pic_as_field(dest, parity);
2704
            dest->pic_id *= 2;
2705
            dest->pic_id += id_add;
2706
        }
2707
    }
2708

    
2709
    return match;
2710
}
2711

    
2712
static int build_def_list(Picture *def, Picture **in, int len, int is_long, int sel){
2713
    int i[2]={0};
2714
    int index=0;
2715

    
2716
    while(i[0]<len || i[1]<len){
2717
        while(i[0]<len && !(in[ i[0] ] && (in[ i[0] ]->reference & sel)))
2718
            i[0]++;
2719
        while(i[1]<len && !(in[ i[1] ] && (in[ i[1] ]->reference & (sel^3))))
2720
            i[1]++;
2721
        if(i[0] < len){
2722
            in[ i[0] ]->pic_id= is_long ? i[0] : in[ i[0] ]->frame_num;
2723
            split_field_copy(&def[index++], in[ i[0]++ ], sel  , 1);
2724
        }
2725
        if(i[1] < len){
2726
            in[ i[1] ]->pic_id= is_long ? i[1] : in[ i[1] ]->frame_num;
2727
            split_field_copy(&def[index++], in[ i[1]++ ], sel^3, 0);
2728
        }
2729
    }
2730

    
2731
    return index;
2732
}
2733

    
2734
static int add_sorted(Picture **sorted, Picture **src, int len, int limit, int dir){
2735
    int i, best_poc;
2736
    int out_i= 0;
2737

    
2738
    for(;;){
2739
        best_poc= dir ? INT_MIN : INT_MAX;
2740

    
2741
        for(i=0; i<len; i++){
2742
            const int poc= src[i]->poc;
2743
            if(((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)){
2744
                best_poc= poc;
2745
                sorted[out_i]= src[i];
2746
            }
2747
        }
2748
        if(best_poc == (dir ? INT_MIN : INT_MAX))
2749
            break;
2750
        limit= sorted[out_i++]->poc - dir;
2751
    }
2752
    return out_i;
2753
}
2754

    
2755
/**
2756
 * fills the default_ref_list.
2757
 */
2758
static int fill_default_ref_list(H264Context *h){
2759
    MpegEncContext * const s = &h->s;
2760
    int i, len;
2761

    
2762
    if(h->slice_type_nos==FF_B_TYPE){
2763
        Picture *sorted[32];
2764
        int cur_poc, list;
2765
        int lens[2];
2766

    
2767
        if(FIELD_PICTURE)
2768
            cur_poc= s->current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
2769
        else
2770
            cur_poc= s->current_picture_ptr->poc;
2771

    
2772
        for(list= 0; list<2; list++){
2773
            len= add_sorted(sorted    , h->short_ref, h->short_ref_count, cur_poc, 1^list);
2774
            len+=add_sorted(sorted+len, h->short_ref, h->short_ref_count, cur_poc, 0^list);
2775
            assert(len<=32);
2776
            len= build_def_list(h->default_ref_list[list]    , sorted     , len, 0, s->picture_structure);
2777
            len+=build_def_list(h->default_ref_list[list]+len, h->long_ref, 16 , 1, s->picture_structure);
2778
            assert(len<=32);
2779

    
2780
            if(len < h->ref_count[list])
2781
                memset(&h->default_ref_list[list][len], 0, sizeof(Picture)*(h->ref_count[list] - len));
2782
            lens[list]= len;
2783
        }
2784

    
2785
        if(lens[0] == lens[1] && lens[1] > 1){
2786
            for(i=0; h->default_ref_list[0][i].data[0] == h->default_ref_list[1][i].data[0] && i<lens[0]; i++);
2787
            if(i == lens[0])
2788
                FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]);
2789
        }
2790
    }else{
2791
        len = build_def_list(h->default_ref_list[0]    , h->short_ref, h->short_ref_count, 0, s->picture_structure);
2792
        len+= build_def_list(h->default_ref_list[0]+len, h-> long_ref, 16                , 1, s->picture_structure);
2793
        assert(len <= 32);
2794
        if(len < h->ref_count[0])
2795
            memset(&h->default_ref_list[0][len], 0, sizeof(Picture)*(h->ref_count[0] - len));
2796
    }
2797
#ifdef TRACE
2798
    for (i=0; i<h->ref_count[0]; i++) {
2799
        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]);
2800
    }
2801
    if(h->slice_type_nos==FF_B_TYPE){
2802
        for (i=0; i<h->ref_count[1]; i++) {
2803
            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]);
2804
        }
2805
    }
2806
#endif
2807
    return 0;
2808
}
2809

    
2810
static void print_short_term(H264Context *h);
2811
static void print_long_term(H264Context *h);
2812

    
2813
/**
2814
 * Extract structure information about the picture described by pic_num in
2815
 * the current decoding context (frame or field). Note that pic_num is
2816
 * picture number without wrapping (so, 0<=pic_num<max_pic_num).
2817
 * @param pic_num picture number for which to extract structure information
2818
 * @param structure one of PICT_XXX describing structure of picture
2819
 *                      with pic_num
2820
 * @return frame number (short term) or long term index of picture
2821
 *         described by pic_num
2822
 */
2823
static int pic_num_extract(H264Context *h, int pic_num, int *structure){
2824
    MpegEncContext * const s = &h->s;
2825

    
2826
    *structure = s->picture_structure;
2827
    if(FIELD_PICTURE){
2828
        if (!(pic_num & 1))
2829
            /* opposite field */
2830
            *structure ^= PICT_FRAME;
2831
        pic_num >>= 1;
2832
    }
2833

    
2834
    return pic_num;
2835
}
2836

    
2837
static int decode_ref_pic_list_reordering(H264Context *h){
2838
    MpegEncContext * const s = &h->s;
2839
    int list, index, pic_structure;
2840

    
2841
    print_short_term(h);
2842
    print_long_term(h);
2843

    
2844
    for(list=0; list<h->list_count; list++){
2845
        memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]);
2846

    
2847
        if(get_bits1(&s->gb)){
2848
            int pred= h->curr_pic_num;
2849

    
2850
            for(index=0; ; index++){
2851
                unsigned int reordering_of_pic_nums_idc= get_ue_golomb_31(&s->gb);
2852
                unsigned int pic_id;
2853
                int i;
2854
                Picture *ref = NULL;
2855

    
2856
                if(reordering_of_pic_nums_idc==3)
2857
                    break;
2858

    
2859
                if(index >= h->ref_count[list]){
2860
                    av_log(h->s.avctx, AV_LOG_ERROR, "reference count overflow\n");
2861
                    return -1;
2862
                }
2863

    
2864
                if(reordering_of_pic_nums_idc<3){
2865
                    if(reordering_of_pic_nums_idc<2){
2866
                        const unsigned int abs_diff_pic_num= get_ue_golomb(&s->gb) + 1;
2867
                        int frame_num;
2868

    
2869
                        if(abs_diff_pic_num > h->max_pic_num){
2870
                            av_log(h->s.avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n");
2871
                            return -1;
2872
                        }
2873

    
2874
                        if(reordering_of_pic_nums_idc == 0) pred-= abs_diff_pic_num;
2875
                        else                                pred+= abs_diff_pic_num;
2876
                        pred &= h->max_pic_num - 1;
2877

    
2878
                        frame_num = pic_num_extract(h, pred, &pic_structure);
2879

    
2880
                        for(i= h->short_ref_count-1; i>=0; i--){
2881
                            ref = h->short_ref[i];
2882
                            assert(ref->reference);
2883
                            assert(!ref->long_ref);
2884
                            if(
2885
                                   ref->frame_num == frame_num &&
2886
                                   (ref->reference & pic_structure)
2887
                              )
2888
                                break;
2889
                        }
2890
                        if(i>=0)
2891
                            ref->pic_id= pred;
2892
                    }else{
2893
                        int long_idx;
2894
                        pic_id= get_ue_golomb(&s->gb); //long_term_pic_idx
2895

    
2896
                        long_idx= pic_num_extract(h, pic_id, &pic_structure);
2897

    
2898
                        if(long_idx>31){
2899
                            av_log(h->s.avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n");
2900
                            return -1;
2901
                        }
2902
                        ref = h->long_ref[long_idx];
2903
                        assert(!(ref && !ref->reference));
2904
                        if(ref && (ref->reference & pic_structure)){
2905
                            ref->pic_id= pic_id;
2906
                            assert(ref->long_ref);
2907
                            i=0;
2908
                        }else{
2909
                            i=-1;
2910
                        }
2911
                    }
2912

    
2913
                    if (i < 0) {
2914
                        av_log(h->s.avctx, AV_LOG_ERROR, "reference picture missing during reorder\n");
2915
                        memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME
2916
                    } else {
2917
                        for(i=index; i+1<h->ref_count[list]; i++){
2918
                            if(ref->long_ref == h->ref_list[list][i].long_ref && ref->pic_id == h->ref_list[list][i].pic_id)
2919
                                break;
2920
                        }
2921
                        for(; i > index; i--){
2922
                            h->ref_list[list][i]= h->ref_list[list][i-1];
2923
                        }
2924
                        h->ref_list[list][index]= *ref;
2925
                        if (FIELD_PICTURE){
2926
                            pic_as_field(&h->ref_list[list][index], pic_structure);
2927
                        }
2928
                    }
2929
                }else{
2930
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n");
2931
                    return -1;
2932
                }
2933
            }
2934
        }
2935
    }
2936
    for(list=0; list<h->list_count; list++){
2937
        for(index= 0; index < h->ref_count[list]; index++){
2938
            if(!h->ref_list[list][index].data[0]){
2939
                av_log(h->s.avctx, AV_LOG_ERROR, "Missing reference picture\n");
2940
                h->ref_list[list][index]= s->current_picture; //FIXME this is not a sensible solution
2941
            }
2942
        }
2943
    }
2944

    
2945
    return 0;
2946
}
2947

    
2948
static void fill_mbaff_ref_list(H264Context *h){
2949
    int list, i, j;
2950
    for(list=0; list<2; list++){ //FIXME try list_count
2951
        for(i=0; i<h->ref_count[list]; i++){
2952
            Picture *frame = &h->ref_list[list][i];
2953
            Picture *field = &h->ref_list[list][16+2*i];
2954
            field[0] = *frame;
2955
            for(j=0; j<3; j++)
2956
                field[0].linesize[j] <<= 1;
2957
            field[0].reference = PICT_TOP_FIELD;
2958
            field[0].poc= field[0].field_poc[0];
2959
            field[1] = field[0];
2960
            for(j=0; j<3; j++)
2961
                field[1].data[j] += frame->linesize[j];
2962
            field[1].reference = PICT_BOTTOM_FIELD;
2963
            field[1].poc= field[1].field_poc[1];
2964

    
2965
            h->luma_weight[list][16+2*i] = h->luma_weight[list][16+2*i+1] = h->luma_weight[list][i];
2966
            h->luma_offset[list][16+2*i] = h->luma_offset[list][16+2*i+1] = h->luma_offset[list][i];
2967
            for(j=0; j<2; j++){
2968
                h->chroma_weight[list][16+2*i][j] = h->chroma_weight[list][16+2*i+1][j] = h->chroma_weight[list][i][j];
2969
                h->chroma_offset[list][16+2*i][j] = h->chroma_offset[list][16+2*i+1][j] = h->chroma_offset[list][i][j];
2970
            }
2971
        }
2972
    }
2973
    for(j=0; j<h->ref_count[1]; j++){
2974
        for(i=0; i<h->ref_count[0]; i++)
2975
            h->implicit_weight[j][16+2*i] = h->implicit_weight[j][16+2*i+1] = h->implicit_weight[j][i];
2976
        memcpy(h->implicit_weight[16+2*j],   h->implicit_weight[j], sizeof(*h->implicit_weight));
2977
        memcpy(h->implicit_weight[16+2*j+1], h->implicit_weight[j], sizeof(*h->implicit_weight));
2978
    }
2979
}
2980

    
2981
static int pred_weight_table(H264Context *h){
2982
    MpegEncContext * const s = &h->s;
2983
    int list, i;
2984
    int luma_def, chroma_def;
2985

    
2986
    h->use_weight= 0;
2987
    h->use_weight_chroma= 0;
2988
    h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
2989
    h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
2990
    luma_def = 1<<h->luma_log2_weight_denom;
2991
    chroma_def = 1<<h->chroma_log2_weight_denom;
2992

    
2993
    for(list=0; list<2; list++){
2994
        for(i=0; i<h->ref_count[list]; i++){
2995
            int luma_weight_flag, chroma_weight_flag;
2996

    
2997
            luma_weight_flag= get_bits1(&s->gb);
2998
            if(luma_weight_flag){
2999
                h->luma_weight[list][i]= get_se_golomb(&s->gb);
3000
                h->luma_offset[list][i]= get_se_golomb(&s->gb);
3001
                if(   h->luma_weight[list][i] != luma_def
3002
                   || h->luma_offset[list][i] != 0)
3003
                    h->use_weight= 1;
3004
            }else{
3005
                h->luma_weight[list][i]= luma_def;
3006
                h->luma_offset[list][i]= 0;
3007
            }
3008

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

    
3035
static void implicit_weight_table(H264Context *h){
3036
    MpegEncContext * const s = &h->s;
3037
    int ref0, ref1;
3038
    int cur_poc = s->current_picture_ptr->poc;
3039

    
3040
    if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
3041
       && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
3042
        h->use_weight= 0;
3043
        h->use_weight_chroma= 0;
3044
        return;
3045
    }
3046

    
3047
    h->use_weight= 2;
3048
    h->use_weight_chroma= 2;
3049
    h->luma_log2_weight_denom= 5;
3050
    h->chroma_log2_weight_denom= 5;
3051

    
3052
    for(ref0=0; ref0 < h->ref_count[0]; ref0++){
3053
        int poc0 = h->ref_list[0][ref0].poc;
3054
        for(ref1=0; ref1 < h->ref_count[1]; ref1++){
3055
            int poc1 = h->ref_list[1][ref1].poc;
3056
            int td = av_clip(poc1 - poc0, -128, 127);
3057
            if(td){
3058
                int tb = av_clip(cur_poc - poc0, -128, 127);
3059
                int tx = (16384 + (FFABS(td) >> 1)) / td;
3060
                int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
3061
                if(dist_scale_factor < -64 || dist_scale_factor > 128)
3062
                    h->implicit_weight[ref0][ref1] = 32;
3063
                else
3064
                    h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
3065
            }else
3066
                h->implicit_weight[ref0][ref1] = 32;
3067
        }
3068
    }
3069
}
3070

    
3071
/**
3072
 * Mark a picture as no longer needed for reference. The refmask
3073
 * argument allows unreferencing of individual fields or the whole frame.
3074
 * If the picture becomes entirely unreferenced, but is being held for
3075
 * display purposes, it is marked as such.
3076
 * @param refmask mask of fields to unreference; the mask is bitwise
3077
 *                anded with the reference marking of pic
3078
 * @return non-zero if pic becomes entirely unreferenced (except possibly
3079
 *         for display purposes) zero if one of the fields remains in
3080
 *         reference
3081
 */
3082
static inline int unreference_pic(H264Context *h, Picture *pic, int refmask){
3083
    int i;
3084
    if (pic->reference &= refmask) {
3085
        return 0;
3086
    } else {
3087
        for(i = 0; h->delayed_pic[i]; i++)
3088
            if(pic == h->delayed_pic[i]){
3089
                pic->reference=DELAYED_PIC_REF;
3090
                break;
3091
            }
3092
        return 1;
3093
    }
3094
}
3095

    
3096
/**
3097
 * instantaneous decoder refresh.
3098
 */
3099
static void idr(H264Context *h){
3100
    int i;
3101

    
3102
    for(i=0; i<16; i++){
3103
        remove_long(h, i, 0);
3104
    }
3105
    assert(h->long_ref_count==0);
3106

    
3107
    for(i=0; i<h->short_ref_count; i++){
3108
        unreference_pic(h, h->short_ref[i], 0);
3109
        h->short_ref[i]= NULL;
3110
    }
3111
    h->short_ref_count=0;
3112
    h->prev_frame_num= 0;
3113
    h->prev_frame_num_offset= 0;
3114
    h->prev_poc_msb=
3115
    h->prev_poc_lsb= 0;
3116
}
3117

    
3118
/* forget old pics after a seek */
3119
static void flush_dpb(AVCodecContext *avctx){
3120
    H264Context *h= avctx->priv_data;
3121
    int i;
3122
    for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
3123
        if(h->delayed_pic[i])
3124
            h->delayed_pic[i]->reference= 0;
3125
        h->delayed_pic[i]= NULL;
3126
    }
3127
    h->outputed_poc= INT_MIN;
3128
    idr(h);
3129
    if(h->s.current_picture_ptr)
3130
        h->s.current_picture_ptr->reference= 0;
3131
    h->s.first_field= 0;
3132
    ff_mpeg_flush(avctx);
3133
}
3134

    
3135
/**
3136
 * Find a Picture in the short term reference list by frame number.
3137
 * @param frame_num frame number to search for
3138
 * @param idx the index into h->short_ref where returned picture is found
3139
 *            undefined if no picture found.
3140
 * @return pointer to the found picture, or NULL if no pic with the provided
3141
 *                 frame number is found
3142
 */
3143
static Picture * find_short(H264Context *h, int frame_num, int *idx){
3144
    MpegEncContext * const s = &h->s;
3145
    int i;
3146

    
3147
    for(i=0; i<h->short_ref_count; i++){
3148
        Picture *pic= h->short_ref[i];
3149
        if(s->avctx->debug&FF_DEBUG_MMCO)
3150
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
3151
        if(pic->frame_num == frame_num) {
3152
            *idx = i;
3153
            return pic;
3154
        }
3155
    }
3156
    return NULL;
3157
}
3158

    
3159
/**
3160
 * Remove a picture from the short term reference list by its index in
3161
 * that list.  This does no checking on the provided index; it is assumed
3162
 * to be valid. Other list entries are shifted down.
3163
 * @param i index into h->short_ref of picture to remove.
3164
 */
3165
static void remove_short_at_index(H264Context *h, int i){
3166
    assert(i >= 0 && i < h->short_ref_count);
3167
    h->short_ref[i]= NULL;
3168
    if (--h->short_ref_count)
3169
        memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i)*sizeof(Picture*));
3170
}
3171

    
3172
/**
3173
 *
3174
 * @return the removed picture or NULL if an error occurs
3175
 */
3176
static Picture * remove_short(H264Context *h, int frame_num, int ref_mask){
3177
    MpegEncContext * const s = &h->s;
3178
    Picture *pic;
3179
    int i;
3180

    
3181
    if(s->avctx->debug&FF_DEBUG_MMCO)
3182
        av_log(h->s.avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);
3183

    
3184
    pic = find_short(h, frame_num, &i);
3185
    if (pic){
3186
        if(unreference_pic(h, pic, ref_mask))
3187
        remove_short_at_index(h, i);
3188
    }
3189

    
3190
    return pic;
3191
}
3192

    
3193
/**
3194
 * Remove a picture from the long term reference list by its index in
3195
 * that list.
3196
 * @return the removed picture or NULL if an error occurs
3197
 */
3198
static Picture * remove_long(H264Context *h, int i, int ref_mask){
3199
    Picture *pic;
3200

    
3201
    pic= h->long_ref[i];
3202
    if (pic){
3203
        if(unreference_pic(h, pic, ref_mask)){
3204
            assert(h->long_ref[i]->long_ref == 1);
3205
            h->long_ref[i]->long_ref= 0;
3206
            h->long_ref[i]= NULL;
3207
            h->long_ref_count--;
3208
        }
3209
    }
3210

    
3211
    return pic;
3212
}
3213

    
3214
/**
3215
 * print short term list
3216
 */
3217
static void print_short_term(H264Context *h) {
3218
    uint32_t i;
3219
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3220
        av_log(h->s.avctx, AV_LOG_DEBUG, "short term list:\n");
3221
        for(i=0; i<h->short_ref_count; i++){
3222
            Picture *pic= h->short_ref[i];
3223
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3224
        }
3225
    }
3226
}
3227

    
3228
/**
3229
 * print long term list
3230
 */
3231
static void print_long_term(H264Context *h) {
3232
    uint32_t i;
3233
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3234
        av_log(h->s.avctx, AV_LOG_DEBUG, "long term list:\n");
3235
        for(i = 0; i < 16; i++){
3236
            Picture *pic= h->long_ref[i];
3237
            if (pic) {
3238
                av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3239
            }
3240
        }
3241
    }
3242
}
3243

    
3244
/**
3245
 * Executes the reference picture marking (memory management control operations).
3246
 */
3247
static int execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
3248
    MpegEncContext * const s = &h->s;
3249
    int i, j;
3250
    int current_ref_assigned=0;
3251
    Picture *pic;
3252

    
3253
    if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0)
3254
        av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n");
3255

    
3256
    for(i=0; i<mmco_count; i++){
3257
        int structure, frame_num;
3258
        if(s->avctx->debug&FF_DEBUG_MMCO)
3259
            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);
3260

    
3261
        if(   mmco[i].opcode == MMCO_SHORT2UNUSED
3262
           || mmco[i].opcode == MMCO_SHORT2LONG){
3263
            frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure);
3264
            pic = find_short(h, frame_num, &j);
3265
            if(!pic){
3266
                if(mmco[i].opcode != MMCO_SHORT2LONG || !h->long_ref[mmco[i].long_arg]
3267
                   || h->long_ref[mmco[i].long_arg]->frame_num != frame_num)
3268
                av_log(h->s.avctx, AV_LOG_ERROR, "mmco: unref short failure\n");
3269
                continue;
3270
            }
3271
        }
3272

    
3273
        switch(mmco[i].opcode){
3274
        case MMCO_SHORT2UNUSED:
3275
            if(s->avctx->debug&FF_DEBUG_MMCO)
3276
                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);
3277
            remove_short(h, frame_num, structure ^ PICT_FRAME);
3278
            break;
3279
        case MMCO_SHORT2LONG:
3280
                if (h->long_ref[mmco[i].long_arg] != pic)
3281
                    remove_long(h, mmco[i].long_arg, 0);
3282

    
3283
                remove_short_at_index(h, j);
3284
                h->long_ref[ mmco[i].long_arg ]= pic;
3285
                if (h->long_ref[ mmco[i].long_arg ]){
3286
                    h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3287
                    h->long_ref_count++;
3288
                }
3289
            break;
3290
        case MMCO_LONG2UNUSED:
3291
            j = pic_num_extract(h, mmco[i].long_arg, &structure);
3292
            pic = h->long_ref[j];
3293
            if (pic) {
3294
                remove_long(h, j, structure ^ PICT_FRAME);
3295
            } else if(s->avctx->debug&FF_DEBUG_MMCO)
3296
                av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
3297
            break;
3298
        case MMCO_LONG:
3299
                    // Comment below left from previous code as it is an interresting note.
3300
                    /* First field in pair is in short term list or
3301
                     * at a different long term index.
3302
                     * This is not allowed; see 7.4.3.3, notes 2 and 3.
3303
                     * Report the problem and keep the pair where it is,
3304
                     * and mark this field valid.
3305
                     */
3306

    
3307
            if (h->long_ref[mmco[i].long_arg] != s->current_picture_ptr) {
3308
                remove_long(h, mmco[i].long_arg, 0);
3309

    
3310
                h->long_ref[ mmco[i].long_arg ]= s->current_picture_ptr;
3311
                h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3312
                h->long_ref_count++;
3313
            }
3314

    
3315
            s->current_picture_ptr->reference |= s->picture_structure;
3316
            current_ref_assigned=1;
3317
            break;
3318
        case MMCO_SET_MAX_LONG:
3319
            assert(mmco[i].long_arg <= 16);
3320
            // just remove the long term which index is greater than new max
3321
            for(j = mmco[i].long_arg; j<16; j++){
3322
                remove_long(h, j, 0);
3323
            }
3324
            break;
3325
        case MMCO_RESET:
3326
            while(h->short_ref_count){
3327
                remove_short(h, h->short_ref[0]->frame_num, 0);
3328
            }
3329
            for(j = 0; j < 16; j++) {
3330
                remove_long(h, j, 0);
3331
            }
3332
            s->current_picture_ptr->poc=
3333
            s->current_picture_ptr->field_poc[0]=
3334
            s->current_picture_ptr->field_poc[1]=
3335
            h->poc_lsb=
3336
            h->poc_msb=
3337
            h->frame_num=
3338
            s->current_picture_ptr->frame_num= 0;
3339
            break;
3340
        default: assert(0);
3341
        }
3342
    }
3343

    
3344
    if (!current_ref_assigned) {
3345
        /* Second field of complementary field pair; the first field of
3346
         * which is already referenced. If short referenced, it
3347
         * should be first entry in short_ref. If not, it must exist
3348
         * in long_ref; trying to put it on the short list here is an
3349
         * error in the encoded bit stream (ref: 7.4.3.3, NOTE 2 and 3).
3350
         */
3351
        if (h->short_ref_count && h->short_ref[0] == s->current_picture_ptr) {
3352
            /* Just mark the second field valid */
3353
            s->current_picture_ptr->reference = PICT_FRAME;
3354
        } else if (s->current_picture_ptr->long_ref) {
3355
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term reference "
3356
                                             "assignment for second field "
3357
                                             "in complementary field pair "
3358
                                             "(first field is long term)\n");
3359
        } else {
3360
            pic= remove_short(h, s->current_picture_ptr->frame_num, 0);
3361
            if(pic){
3362
                av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
3363
            }
3364

    
3365
            if(h->short_ref_count)
3366
                memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
3367

    
3368
            h->short_ref[0]= s->current_picture_ptr;
3369
            h->short_ref_count++;
3370
            s->current_picture_ptr->reference |= s->picture_structure;
3371
        }
3372
    }
3373

    
3374
    if (h->long_ref_count + h->short_ref_count > h->sps.ref_frame_count){
3375

    
3376
        /* We have too many reference frames, probably due to corrupted
3377
         * stream. Need to discard one frame. Prevents overrun of the
3378
         * short_ref and long_ref buffers.
3379
         */
3380
        av_log(h->s.avctx, AV_LOG_ERROR,
3381
               "number of reference frames exceeds max (probably "
3382
               "corrupt input), discarding one\n");
3383

    
3384
        if (h->long_ref_count && !h->short_ref_count) {
3385
            for (i = 0; i < 16; ++i)
3386
                if (h->long_ref[i])
3387
                    break;
3388

    
3389
            assert(i < 16);
3390
            remove_long(h, i, 0);
3391
        } else {
3392
            pic = h->short_ref[h->short_ref_count - 1];
3393
            remove_short(h, pic->frame_num, 0);
3394
        }
3395
    }
3396

    
3397
    print_short_term(h);
3398
    print_long_term(h);
3399
    return 0;
3400
}
3401

    
3402
static int decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
3403
    MpegEncContext * const s = &h->s;
3404
    int i;
3405

    
3406
    h->mmco_index= 0;
3407
    if(h->nal_unit_type == NAL_IDR_SLICE){ //FIXME fields
3408
        s->broken_link= get_bits1(gb) -1;
3409
        if(get_bits1(gb)){
3410
            h->mmco[0].opcode= MMCO_LONG;
3411
            h->mmco[0].long_arg= 0;
3412
            h->mmco_index= 1;
3413
        }
3414
    }else{
3415
        if(get_bits1(gb)){ // adaptive_ref_pic_marking_mode_flag
3416
            for(i= 0; i<MAX_MMCO_COUNT; i++) {
3417
                MMCOOpcode opcode= get_ue_golomb_31(gb);
3418

    
3419
                h->mmco[i].opcode= opcode;
3420
                if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){
3421
                    h->mmco[i].short_pic_num= (h->curr_pic_num - get_ue_golomb(gb) - 1) & (h->max_pic_num - 1);
3422
/*                    if(h->mmco[i].short_pic_num >= h->short_ref_count || h->short_ref[ h->mmco[i].short_pic_num ] == NULL){
3423
                        av_log(s->avctx, AV_LOG_ERROR, "illegal short ref in memory management control operation %d\n", mmco);
3424
                        return -1;
3425
                    }*/
3426
                }
3427
                if(opcode==MMCO_SHORT2LONG || opcode==MMCO_LONG2UNUSED || opcode==MMCO_LONG || opcode==MMCO_SET_MAX_LONG){
3428
                    unsigned int long_arg= get_ue_golomb_31(gb);
3429
                    if(long_arg >= 32 || (long_arg >= 16 && !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE))){
3430
                        av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode);
3431
                        return -1;
3432
                    }
3433
                    h->mmco[i].long_arg= long_arg;
3434
                }
3435

    
3436
                if(opcode > (unsigned)MMCO_LONG){
3437
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode);
3438
                    return -1;
3439
                }
3440
                if(opcode == MMCO_END)
3441
                    break;
3442
            }
3443
            h->mmco_index= i;
3444
        }else{
3445
            assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
3446

    
3447
            if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
3448
                    !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
3449
                h->mmco[0].opcode= MMCO_SHORT2UNUSED;
3450
                h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
3451
                h->mmco_index= 1;
3452
                if (FIELD_PICTURE) {
3453
                    h->mmco[0].short_pic_num *= 2;
3454
                    h->mmco[1].opcode= MMCO_SHORT2UNUSED;
3455
                    h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
3456
                    h->mmco_index= 2;
3457
                }
3458
            }
3459
        }
3460
    }
3461

    
3462
    return 0;
3463
}
3464

    
3465
static int init_poc(H264Context *h){
3466
    MpegEncContext * const s = &h->s;
3467
    const int max_frame_num= 1<<h->sps.log2_max_frame_num;
3468
    int field_poc[2];
3469
    Picture *cur = s->current_picture_ptr;
3470

    
3471
    h->frame_num_offset= h->prev_frame_num_offset;
3472
    if(h->frame_num < h->prev_frame_num)
3473
        h->frame_num_offset += max_frame_num;
3474

    
3475
    if(h->sps.poc_type==0){
3476
        const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
3477

    
3478
        if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
3479
            h->poc_msb = h->prev_poc_msb + max_poc_lsb;
3480
        else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
3481
            h->poc_msb = h->prev_poc_msb - max_poc_lsb;
3482
        else
3483
            h->poc_msb = h->prev_poc_msb;
3484
//printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
3485
        field_poc[0] =
3486
        field_poc[1] = h->poc_msb + h->poc_lsb;
3487
        if(s->picture_structure == PICT_FRAME)
3488
            field_poc[1] += h->delta_poc_bottom;
3489
    }else if(h->sps.poc_type==1){
3490
        int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
3491
        int i;
3492

    
3493
        if(h->sps.poc_cycle_length != 0)
3494
            abs_frame_num = h->frame_num_offset + h->frame_num;
3495
        else
3496
            abs_frame_num = 0;
3497

    
3498
        if(h->nal_ref_idc==0 && abs_frame_num > 0)
3499
            abs_frame_num--;
3500

    
3501
        expected_delta_per_poc_cycle = 0;
3502
        for(i=0; i < h->sps.poc_cycle_length; i++)
3503
            expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
3504

    
3505
        if(abs_frame_num > 0){
3506
            int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
3507
            int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
3508

    
3509
            expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
3510
            for(i = 0; i <= frame_num_in_poc_cycle; i++)
3511
                expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
3512
        } else
3513
            expectedpoc = 0;
3514

    
3515
        if(h->nal_ref_idc == 0)
3516
            expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
3517

    
3518
        field_poc[0] = expectedpoc + h->delta_poc[0];
3519
        field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
3520

    
3521
        if(s->picture_structure == PICT_FRAME)
3522
            field_poc[1] += h->delta_poc[1];
3523
    }else{
3524
        int poc= 2*(h->frame_num_offset + h->frame_num);
3525

    
3526
        if(!h->nal_ref_idc)
3527
            poc--;
3528

    
3529
        field_poc[0]= poc;
3530
        field_poc[1]= poc;
3531
    }
3532

    
3533
    if(s->picture_structure != PICT_BOTTOM_FIELD)
3534
        s->current_picture_ptr->field_poc[0]= field_poc[0];
3535
    if(s->picture_structure != PICT_TOP_FIELD)
3536
        s->current_picture_ptr->field_poc[1]= field_poc[1];
3537
    cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
3538

    
3539
    return 0;
3540
}
3541

    
3542

    
3543
/**
3544
 * initialize scan tables
3545
 */
3546
static void init_scan_tables(H264Context *h){
3547
    MpegEncContext * const s = &h->s;
3548
    int i;
3549
    if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
3550
        memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
3551
        memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
3552
    }else{
3553
        for(i=0; i<16; i++){
3554
#define T(x) (x>>2) | ((x<<2) & 0xF)
3555
            h->zigzag_scan[i] = T(zigzag_scan[i]);
3556
            h-> field_scan[i] = T( field_scan[i]);
3557
#undef T
3558
        }
3559
    }
3560
    if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
3561
        memcpy(h->zigzag_scan8x8,       zigzag_scan8x8,       64*sizeof(uint8_t));
3562
        memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
3563
        memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
3564
        memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
3565
    }else{
3566
        for(i=0; i<64; i++){
3567
#define T(x) (x>>3) | ((x&7)<<3)
3568
            h->zigzag_scan8x8[i]       = T(zigzag_scan8x8[i]);
3569
            h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
3570
            h->field_scan8x8[i]        = T(field_scan8x8[i]);
3571
            h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
3572
#undef T
3573
        }
3574
    }
3575
    if(h->sps.transform_bypass){ //FIXME same ugly
3576
        h->zigzag_scan_q0          = zigzag_scan;
3577
        h->zigzag_scan8x8_q0       = zigzag_scan8x8;
3578
        h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
3579
        h->field_scan_q0           = field_scan;
3580
        h->field_scan8x8_q0        = field_scan8x8;
3581
        h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
3582
    }else{
3583
        h->zigzag_scan_q0          = h->zigzag_scan;
3584
        h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
3585
        h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
3586
        h->field_scan_q0           = h->field_scan;
3587
        h->field_scan8x8_q0        = h->field_scan8x8;
3588
        h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
3589
    }
3590
}
3591

    
3592
/**
3593
 * Replicates H264 "master" context to thread contexts.
3594
 */
3595
static void clone_slice(H264Context *dst, H264Context *src)
3596
{
3597
    memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
3598
    dst->s.current_picture_ptr  = src->s.current_picture_ptr;
3599
    dst->s.current_picture      = src->s.current_picture;
3600
    dst->s.linesize             = src->s.linesize;
3601
    dst->s.uvlinesize           = src->s.uvlinesize;
3602
    dst->s.first_field          = src->s.first_field;
3603

    
3604
    dst->prev_poc_msb           = src->prev_poc_msb;
3605
    dst->prev_poc_lsb           = src->prev_poc_lsb;
3606
    dst->prev_frame_num_offset  = src->prev_frame_num_offset;
3607
    dst->prev_frame_num         = src->prev_frame_num;
3608
    dst->short_ref_count        = src->short_ref_count;
3609

    
3610
    memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
3611
    memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
3612
    memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
3613
    memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
3614

    
3615
    memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
3616
    memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
3617
}
3618

    
3619
/**
3620
 * decodes a slice header.
3621
 * This will also call MPV_common_init() and frame_start() as needed.
3622
 *
3623
 * @param h h264context
3624
 * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
3625
 *
3626
 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
3627
 */
3628
static int decode_slice_header(H264Context *h, H264Context *h0){
3629
    MpegEncContext * const s = &h->s;
3630
    MpegEncContext * const s0 = &h0->s;
3631
    unsigned int first_mb_in_slice;
3632
    unsigned int pps_id;
3633
    int num_ref_idx_active_override_flag;
3634
    unsigned int slice_type, tmp, i, j;
3635
    int default_ref_list_done = 0;
3636
    int last_pic_structure;
3637

    
3638
    s->dropable= h->nal_ref_idc == 0;
3639

    
3640
    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
3641
        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
3642
        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
3643
    }else{
3644
        s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
3645
        s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
3646
    }
3647

    
3648
    first_mb_in_slice= get_ue_golomb(&s->gb);
3649

    
3650
    if((s->flags2 & CODEC_FLAG2_CHUNKS) && first_mb_in_slice == 0){
3651
        h0->current_slice = 0;
3652
        if (!s0->first_field)
3653
            s->current_picture_ptr= NULL;
3654
    }
3655

    
3656
    slice_type= get_ue_golomb_31(&s->gb);
3657
    if(slice_type > 9){
3658
        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);
3659
        return -1;
3660
    }
3661
    if(slice_type > 4){
3662
        slice_type -= 5;
3663
        h->slice_type_fixed=1;
3664
    }else
3665
        h->slice_type_fixed=0;
3666

    
3667
    slice_type= golomb_to_pict_type[ slice_type ];
3668
    if (slice_type == FF_I_TYPE
3669
        || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
3670
        default_ref_list_done = 1;
3671
    }
3672
    h->slice_type= slice_type;
3673
    h->slice_type_nos= slice_type & 3;
3674

    
3675
    s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
3676
    if (s->pict_type == FF_B_TYPE && s0->last_picture_ptr == NULL) {
3677
        av_log(h->s.avctx, AV_LOG_ERROR,
3678
               "B picture before any references, skipping\n");
3679
        return -1;
3680
    }
3681

    
3682
    pps_id= get_ue_golomb(&s->gb);
3683
    if(pps_id>=MAX_PPS_COUNT){
3684
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
3685
        return -1;
3686
    }
3687
    if(!h0->pps_buffers[pps_id]) {
3688
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS referenced\n");
3689
        return -1;
3690
    }
3691
    h->pps= *h0->pps_buffers[pps_id];
3692

    
3693
    if(!h0->sps_buffers[h->pps.sps_id]) {
3694
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS referenced\n");
3695
        return -1;
3696
    }
3697
    h->sps = *h0->sps_buffers[h->pps.sps_id];
3698

    
3699
    if(h == h0 && h->dequant_coeff_pps != pps_id){
3700
        h->dequant_coeff_pps = pps_id;
3701
        init_dequant_tables(h);
3702
    }
3703

    
3704
    s->mb_width= h->sps.mb_width;
3705
    s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
3706

    
3707
    h->b_stride=  s->mb_width*4;
3708
    h->b8_stride= s->mb_width*2;
3709

    
3710
    s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
3711
    if(h->sps.frame_mbs_only_flag)
3712
        s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
3713
    else
3714
        s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
3715

    
3716
    if (s->context_initialized
3717
        && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
3718
        if(h != h0)
3719
            return -1;   // width / height changed during parallelized decoding
3720
        free_tables(h);
3721
        flush_dpb(s->avctx);
3722
        MPV_common_end(s);
3723
    }
3724
    if (!s->context_initialized) {
3725
        if(h != h0)
3726
            return -1;  // we cant (re-)initialize context during parallel decoding
3727
        if (MPV_common_init(s) < 0)
3728
            return -1;
3729
        s->first_field = 0;
3730

    
3731
        init_scan_tables(h);
3732
        alloc_tables(h);
3733

    
3734
        for(i = 1; i < s->avctx->thread_count; i++) {
3735
            H264Context *c;
3736
            c = h->thread_context[i] = av_malloc(sizeof(H264Context));
3737
            memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
3738
            memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
3739
            c->sps = h->sps;
3740
            c->pps = h->pps;
3741
            init_scan_tables(c);
3742
            clone_tables(c, h);
3743
        }
3744

    
3745
        for(i = 0; i < s->avctx->thread_count; i++)
3746
            if(context_init(h->thread_context[i]) < 0)
3747
                return -1;
3748

    
3749
        s->avctx->width = s->width;
3750
        s->avctx->height = s->height;
3751
        s->avctx->sample_aspect_ratio= h->sps.sar;
3752
        if(!s->avctx->sample_aspect_ratio.den)
3753
            s->avctx->sample_aspect_ratio.den = 1;
3754

    
3755
        if(h->sps.timing_info_present_flag){
3756
            s->avctx->time_base= (AVRational){h->sps.num_units_in_tick * 2, h->sps.time_scale};
3757
            if(h->x264_build > 0 && h->x264_build < 44)
3758
                s->avctx->time_base.den *= 2;
3759
            av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
3760
                      s->avctx->time_base.num, s->avctx->time_base.den, 1<<30);
3761
        }
3762
    }
3763

    
3764
    h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
3765

    
3766
    h->mb_mbaff = 0;
3767
    h->mb_aff_frame = 0;
3768
    last_pic_structure = s0->picture_structure;
3769
    if(h->sps.frame_mbs_only_flag){
3770
        s->picture_structure= PICT_FRAME;
3771
    }else{
3772
        if(get_bits1(&s->gb)) { //field_pic_flag
3773
            s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
3774
        } else {
3775
            s->picture_structure= PICT_FRAME;
3776
            h->mb_aff_frame = h->sps.mb_aff;
3777
        }
3778
    }
3779
    h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
3780

    
3781
    if(h0->current_slice == 0){
3782
        while(h->frame_num !=  h->prev_frame_num &&
3783
              h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
3784
            av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
3785
            frame_start(h);
3786
            h->prev_frame_num++;
3787
            h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
3788
            s->current_picture_ptr->frame_num= h->prev_frame_num;
3789
            execute_ref_pic_marking(h, NULL, 0);
3790
        }
3791

    
3792
        /* See if we have a decoded first field looking for a pair... */
3793
        if (s0->first_field) {
3794
            assert(s0->current_picture_ptr);
3795
            assert(s0->current_picture_ptr->data[0]);
3796
            assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
3797

    
3798
            /* figure out if we have a complementary field pair */
3799
            if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
3800
                /*
3801
                 * Previous field is unmatched. Don't display it, but let it
3802
                 * remain for reference if marked as such.
3803
                 */
3804
                s0->current_picture_ptr = NULL;
3805
                s0->first_field = FIELD_PICTURE;
3806

    
3807
            } else {
3808
                if (h->nal_ref_idc &&
3809
                        s0->current_picture_ptr->reference &&
3810
                        s0->current_picture_ptr->frame_num != h->frame_num) {
3811
                    /*
3812
                     * This and previous field were reference, but had
3813
                     * different frame_nums. Consider this field first in
3814
                     * pair. Throw away previous field except for reference
3815
                     * purposes.
3816
                     */
3817
                    s0->first_field = 1;
3818
                    s0->current_picture_ptr = NULL;
3819

    
3820
                } else {
3821
                    /* Second field in complementary pair */
3822
                    s0->first_field = 0;
3823
                }
3824
            }
3825

    
3826
        } else {
3827
            /* Frame or first field in a potentially complementary pair */
3828
            assert(!s0->current_picture_ptr);
3829
            s0->first_field = FIELD_PICTURE;
3830
        }
3831

    
3832
        if((!FIELD_PICTURE || s0->first_field) && frame_start(h) < 0) {
3833
            s0->first_field = 0;
3834
            return -1;
3835
        }
3836
    }
3837
    if(h != h0)
3838
        clone_slice(h, h0);
3839

    
3840
    s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
3841

    
3842
    assert(s->mb_num == s->mb_width * s->mb_height);
3843
    if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
3844
       first_mb_in_slice                    >= s->mb_num){
3845
        av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
3846
        return -1;
3847
    }
3848
    s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
3849
    s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
3850
    if (s->picture_structure == PICT_BOTTOM_FIELD)
3851
        s->resync_mb_y = s->mb_y = s->mb_y + 1;
3852
    assert(s->mb_y < s->mb_height);
3853

    
3854
    if(s->picture_structure==PICT_FRAME){
3855
        h->curr_pic_num=   h->frame_num;
3856
        h->max_pic_num= 1<< h->sps.log2_max_frame_num;
3857
    }else{
3858
        h->curr_pic_num= 2*h->frame_num + 1;
3859
        h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
3860
    }
3861

    
3862
    if(h->nal_unit_type == NAL_IDR_SLICE){
3863
        get_ue_golomb(&s->gb); /* idr_pic_id */
3864
    }
3865

    
3866
    if(h->sps.poc_type==0){
3867
        h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
3868

    
3869
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
3870
            h->delta_poc_bottom= get_se_golomb(&s->gb);
3871
        }
3872
    }
3873

    
3874
    if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
3875
        h->delta_poc[0]= get_se_golomb(&s->gb);
3876

    
3877
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
3878
            h->delta_poc[1]= get_se_golomb(&s->gb);
3879
    }
3880

    
3881
    init_poc(h);
3882

    
3883
    if(h->pps.redundant_pic_cnt_present){
3884
        h->redundant_pic_count= get_ue_golomb(&s->gb);
3885
    }
3886

    
3887
    //set defaults, might be overridden a few lines later
3888
    h->ref_count[0]= h->pps.ref_count[0];
3889
    h->ref_count[1]= h->pps.ref_count[1];
3890

    
3891
    if(h->slice_type_nos != FF_I_TYPE){
3892
        if(h->slice_type_nos == FF_B_TYPE){
3893
            h->direct_spatial_mv_pred= get_bits1(&s->gb);
3894
        }
3895
        num_ref_idx_active_override_flag= get_bits1(&s->gb);
3896

    
3897
        if(num_ref_idx_active_override_flag){
3898
            h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
3899
            if(h->slice_type_nos==FF_B_TYPE)
3900
                h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
3901

    
3902
            if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
3903
                av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
3904
                h->ref_count[0]= h->ref_count[1]= 1;
3905
                return -1;
3906
            }
3907
        }
3908
        if(h->slice_type_nos == FF_B_TYPE)
3909
            h->list_count= 2;
3910
        else
3911
            h->list_count= 1;
3912
    }else
3913
        h->list_count= 0;
3914

    
3915
    if(!default_ref_list_done){
3916
        fill_default_ref_list(h);
3917
    }
3918

    
3919
    if(h->slice_type_nos!=FF_I_TYPE && decode_ref_pic_list_reordering(h) < 0)
3920
        return -1;
3921

    
3922
    if(h->slice_type_nos!=FF_I_TYPE){
3923
        s->last_picture_ptr= &h->ref_list[0][0];
3924
        ff_copy_picture(&s->last_picture, s->last_picture_ptr);
3925
    }
3926
    if(h->slice_type_nos==FF_B_TYPE){
3927
        s->next_picture_ptr= &h->ref_list[1][0];
3928
        ff_copy_picture(&s->next_picture, s->next_picture_ptr);
3929
    }
3930

    
3931
    if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
3932
       ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
3933
        pred_weight_table(h);
3934
    else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE)
3935
        implicit_weight_table(h);
3936
    else
3937
        h->use_weight = 0;
3938

    
3939
    if(h->nal_ref_idc)
3940
        decode_ref_pic_marking(h0, &s->gb);
3941

    
3942
    if(FRAME_MBAFF)
3943
        fill_mbaff_ref_list(h);
3944

    
3945
    if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
3946
        direct_dist_scale_factor(h);
3947
    direct_ref_list_init(h);
3948

    
3949
    if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
3950
        tmp = get_ue_golomb_31(&s->gb);
3951
        if(tmp > 2){
3952
            av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
3953
            return -1;
3954
        }
3955
        h->cabac_init_idc= tmp;
3956
    }
3957

    
3958
    h->last_qscale_diff = 0;
3959
    tmp = h->pps.init_qp + get_se_golomb(&s->gb);
3960
    if(tmp>51){
3961
        av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
3962
        return -1;
3963
    }
3964
    s->qscale= tmp;
3965
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3966
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3967
    //FIXME qscale / qp ... stuff
3968
    if(h->slice_type == FF_SP_TYPE){
3969
        get_bits1(&s->gb); /* sp_for_switch_flag */
3970
    }
3971
    if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
3972
        get_se_golomb(&s->gb); /* slice_qs_delta */
3973
    }
3974

    
3975
    h->deblocking_filter = 1;
3976
    h->slice_alpha_c0_offset = 0;
3977
    h->slice_beta_offset = 0;
3978
    if( h->pps.deblocking_filter_parameters_present ) {
3979
        tmp= get_ue_golomb_31(&s->gb);
3980
        if(tmp > 2){
3981
            av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
3982
            return -1;
3983
        }
3984
        h->deblocking_filter= tmp;
3985
        if(h->deblocking_filter < 2)
3986
            h->deblocking_filter^= 1; // 1<->0
3987

    
3988
        if( h->deblocking_filter ) {
3989
            h->slice_alpha_c0_offset = get_se_golomb(&s->gb) << 1;
3990
            h->slice_beta_offset = get_se_golomb(&s->gb) << 1;
3991
        }
3992
    }
3993

    
3994
    if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
3995
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
3996
       ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
3997
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
3998
        h->deblocking_filter= 0;
3999

    
4000
    if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
4001
        if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
4002
            /* Cheat slightly for speed:
4003
               Do not bother to deblock across slices. */
4004
            h->deblocking_filter = 2;
4005
        } else {
4006
            h0->max_contexts = 1;
4007
            if(!h0->single_decode_warning) {
4008
                av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
4009
                h0->single_decode_warning = 1;
4010
            }
4011
            if(h != h0)
4012
                return 1; // deblocking switched inside frame
4013
        }
4014
    }
4015

    
4016
#if 0 //FMO
4017
    if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
4018
        slice_group_change_cycle= get_bits(&s->gb, ?);
4019
#endif
4020

    
4021
    h0->last_slice_type = slice_type;
4022
    h->slice_num = ++h0->current_slice;
4023
    if(h->slice_num >= MAX_SLICES){
4024
        av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
4025
    }
4026

    
4027
    for(j=0; j<2; j++){
4028
        int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
4029
        ref2frm[0]=
4030
        ref2frm[1]= -1;
4031
        for(i=0; i<16; i++)
4032
            ref2frm[i+2]= 4*h->ref_list[j][i].frame_num
4033
                          +(h->ref_list[j][i].reference&3);
4034
        ref2frm[18+0]=
4035
        ref2frm[18+1]= -1;
4036
        for(i=16; i<48; i++)
4037
            ref2frm[i+4]= 4*h->ref_list[j][i].frame_num
4038
                          +(h->ref_list[j][i].reference&3);
4039
    }
4040

    
4041
    h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
4042
    h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
4043

    
4044
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
4045
        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",
4046
               h->slice_num,
4047
               (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
4048
               first_mb_in_slice,
4049
               av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
4050
               pps_id, h->frame_num,
4051
               s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
4052
               h->ref_count[0], h->ref_count[1],
4053
               s->qscale,
4054
               h->deblocking_filter, h->slice_alpha_c0_offset/2, h->slice_beta_offset/2,
4055
               h->use_weight,
4056
               h->use_weight==1 && h->use_weight_chroma ? "c" : "",
4057
               h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
4058
               );
4059
    }
4060

    
4061
    return 0;
4062
}
4063

    
4064
/**
4065
 *
4066
 */
4067
static inline int get_level_prefix(GetBitContext *gb){
4068
    unsigned int buf;
4069
    int log;
4070

    
4071
    OPEN_READER(re, gb);
4072
    UPDATE_CACHE(re, gb);
4073
    buf=GET_CACHE(re, gb);
4074

    
4075
    log= 32 - av_log2(buf);
4076
#ifdef TRACE
4077
    print_bin(buf>>(32-log), log);
4078
    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__);
4079
#endif
4080

    
4081
    LAST_SKIP_BITS(re, gb, log);
4082
    CLOSE_READER(re, gb);
4083

    
4084
    return log-1;
4085
}
4086

    
4087
static inline int get_dct8x8_allowed(H264Context *h){
4088
    if(h->sps.direct_8x8_inference_flag)
4089
        return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8                )*0x0001000100010001ULL));
4090
    else
4091
        return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8|MB_TYPE_DIRECT2)*0x0001000100010001ULL));
4092
}
4093

    
4094
/**
4095
 * decodes a residual block.
4096
 * @param n block index
4097
 * @param scantable scantable
4098
 * @param max_coeff number of coefficients in the block
4099
 * @return <0 if an error occurred
4100
 */
4101
static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
4102
    MpegEncContext * const s = &h->s;
4103
    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};
4104
    int level[16];
4105
    int zeros_left, coeff_num, coeff_token, total_coeff, i, j, trailing_ones, run_before;
4106

    
4107
    //FIXME put trailing_onex into the context
4108

    
4109
    if(n == CHROMA_DC_BLOCK_INDEX){
4110
        coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
4111
        total_coeff= coeff_token>>2;
4112
    }else{
4113
        if(n == LUMA_DC_BLOCK_INDEX){
4114
            total_coeff= pred_non_zero_count(h, 0);
4115
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
4116
            total_coeff= coeff_token>>2;
4117
        }else{
4118
            total_coeff= pred_non_zero_count(h, n);
4119
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
4120
            total_coeff= coeff_token>>2;
4121
            h->non_zero_count_cache[ scan8[n] ]= total_coeff;
4122
        }
4123
    }
4124

    
4125
    //FIXME set last_non_zero?
4126

    
4127
    if(total_coeff==0)
4128
        return 0;
4129
    if(total_coeff > (unsigned)max_coeff) {
4130
        av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", s->mb_x, s->mb_y, total_coeff);
4131
        return -1;
4132
    }
4133

    
4134
    trailing_ones= coeff_token&3;
4135
    tprintf(h->s.avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
4136
    assert(total_coeff<=16);
4137

    
4138
    i = show_bits(gb, 3);
4139
    skip_bits(gb, trailing_ones);
4140
    level[0] = 1-((i&4)>>1);
4141
    level[1] = 1-((i&2)   );
4142
    level[2] = 1-((i&1)<<1);
4143

    
4144
    if(trailing_ones<total_coeff) {
4145
        int mask, prefix;
4146
        int suffix_length = total_coeff > 10 && trailing_ones < 3;
4147
        int bitsi= show_bits(gb, LEVEL_TAB_BITS);
4148
        int level_code= cavlc_level_tab[suffix_length][bitsi][0];
4149

    
4150
        skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
4151
        if(level_code >= 100){
4152
            prefix= level_code - 100;
4153
            if(prefix == LEVEL_TAB_BITS)
4154
                prefix += get_level_prefix(gb);
4155

    
4156
            //first coefficient has suffix_length equal to 0 or 1
4157
            if(prefix<14){ //FIXME try to build a large unified VLC table for all this
4158
                if(suffix_length)
4159
                    level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
4160
                else
4161
                    level_code= (prefix<<suffix_length); //part
4162
            }else if(prefix==14){
4163
                if(suffix_length)
4164
                    level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
4165
                else
4166
                    level_code= prefix + get_bits(gb, 4); //part
4167
            }else{
4168
                level_code= (15<<suffix_length) + get_bits(gb, prefix-3); //part
4169
                if(suffix_length==0) level_code+=15; //FIXME doesn't make (much)sense
4170
                if(prefix>=16)
4171
                    level_code += (1<<(prefix-3))-4096;
4172
            }
4173

    
4174
            if(trailing_ones < 3) level_code += 2;
4175

    
4176
            suffix_length = 2;
4177
            mask= -(level_code&1);
4178
            level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
4179
        }else{
4180
            if(trailing_ones < 3) level_code += (level_code>>31)|1;
4181

    
4182
            suffix_length = 1;
4183
            if(level_code + 3U > 6U)
4184
                suffix_length++;
4185
            level[trailing_ones]= level_code;
4186
        }
4187

    
4188
        //remaining coefficients have suffix_length > 0
4189
        for(i=trailing_ones+1;i<total_coeff;i++) {
4190
            static const unsigned int suffix_limit[7] = {0,3,6,12,24,48,INT_MAX };
4191
            int bitsi= show_bits(gb, LEVEL_TAB_BITS);
4192
            level_code= cavlc_level_tab[suffix_length][bitsi][0];
4193

    
4194
            skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
4195
            if(level_code >= 100){
4196
                prefix= level_code - 100;
4197
                if(prefix == LEVEL_TAB_BITS){
4198
                    prefix += get_level_prefix(gb);
4199
                }
4200
                if(prefix<15){
4201
                    level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
4202
                }else{
4203
                    level_code = (15<<suffix_length) + get_bits(gb, prefix-3);
4204
                    if(prefix>=16)
4205
                        level_code += (1<<(prefix-3))-4096;
4206
                }
4207
                mask= -(level_code&1);
4208
                level_code= (((2+level_code)>>1) ^ mask) - mask;
4209
            }
4210
            level[i]= level_code;
4211

    
4212
            if(suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length])
4213
                suffix_length++;
4214
        }
4215
    }
4216

    
4217
    if(total_coeff == max_coeff)
4218
        zeros_left=0;
4219
    else{
4220
        if(n == CHROMA_DC_BLOCK_INDEX)
4221
            zeros_left= get_vlc2(gb, chroma_dc_total_zeros_vlc[ total_coeff-1 ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
4222
        else
4223
            zeros_left= get_vlc2(gb, total_zeros_vlc[ total_coeff-1 ].table, TOTAL_ZEROS_VLC_BITS, 1);
4224
    }
4225

    
4226
    coeff_num = zeros_left + total_coeff - 1;
4227
    j = scantable[coeff_num];
4228
    if(n > 24){
4229
        block[j] = level[0];
4230
        for(i=1;i<total_coeff;i++) {
4231
            if(zeros_left <= 0)
4232
                run_before = 0;
4233
            else if(zeros_left < 7){
4234
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4235
            }else{
4236
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4237
            }
4238
            zeros_left -= run_before;
4239
            coeff_num -= 1 + run_before;
4240
            j= scantable[ coeff_num ];
4241

    
4242
            block[j]= level[i];
4243
        }
4244
    }else{
4245
        block[j] = (level[0] * qmul[j] + 32)>>6;
4246
        for(i=1;i<total_coeff;i++) {
4247
            if(zeros_left <= 0)
4248
                run_before = 0;
4249
            else if(zeros_left < 7){
4250
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4251
            }else{
4252
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4253
            }
4254
            zeros_left -= run_before;
4255
            coeff_num -= 1 + run_before;
4256
            j= scantable[ coeff_num ];
4257

    
4258
            block[j]= (level[i] * qmul[j] + 32)>>6;
4259
        }
4260
    }
4261

    
4262
    if(zeros_left<0){
4263
        av_log(h->s.avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y);
4264
        return -1;
4265
    }
4266

    
4267
    return 0;
4268
}
4269

    
4270
static void predict_field_decoding_flag(H264Context *h){
4271
    MpegEncContext * const s = &h->s;
4272
    const int mb_xy= h->mb_xy;
4273
    int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
4274
                ? s->current_picture.mb_type[mb_xy-1]
4275
                : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
4276
                ? s->current_picture.mb_type[mb_xy-s->mb_stride]
4277
                : 0;
4278
    h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
4279
}
4280

    
4281
/**
4282
 * decodes a P_SKIP or B_SKIP macroblock
4283
 */
4284
static void decode_mb_skip(H264Context *h){
4285
    MpegEncContext * const s = &h->s;
4286
    const int mb_xy= h->mb_xy;
4287
    int mb_type=0;
4288

    
4289
    memset(h->non_zero_count[mb_xy], 0, 16);
4290
    memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui
4291

    
4292
    if(MB_FIELD)
4293
        mb_type|= MB_TYPE_INTERLACED;
4294

    
4295
    if( h->slice_type_nos == FF_B_TYPE )
4296
    {
4297
        // just for fill_caches. pred_direct_motion will set the real mb_type
4298
        mb_type|= MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
4299

    
4300
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4301
        pred_direct_motion(h, &mb_type);
4302
        mb_type|= MB_TYPE_SKIP;
4303
    }
4304
    else
4305
    {
4306
        int mx, my;
4307
        mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
4308

    
4309
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4310
        pred_pskip_motion(h, &mx, &my);
4311
        fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
4312
        fill_rectangle(  h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
4313
    }
4314

    
4315
    write_back_motion(h, mb_type);
4316
    s->current_picture.mb_type[mb_xy]= mb_type;
4317
    s->current_picture.qscale_table[mb_xy]= s->qscale;
4318
    h->slice_table[ mb_xy ]= h->slice_num;
4319
    h->prev_mb_skipped= 1;
4320
}
4321

    
4322
/**
4323
 * decodes a macroblock
4324
 * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
4325
 */
4326
static int decode_mb_cavlc(H264Context *h){
4327
    MpegEncContext * const s = &h->s;
4328
    int mb_xy;
4329
    int partition_count;
4330
    unsigned int mb_type, cbp;
4331
    int dct8x8_allowed= h->pps.transform_8x8_mode;
4332

    
4333
    mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
4334

    
4335
    tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
4336
    cbp = 0; /* avoid warning. FIXME: find a solution without slowing
4337
                down the code */
4338
    if(h->slice_type_nos != FF_I_TYPE){
4339
        if(s->mb_skip_run==-1)
4340
            s->mb_skip_run= get_ue_golomb(&s->gb);
4341

    
4342
        if (s->mb_skip_run--) {
4343
            if(FRAME_MBAFF && (s->mb_y&1) == 0){
4344
                if(s->mb_skip_run==0)
4345
                    h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
4346
                else
4347
                    predict_field_decoding_flag(h);
4348
            }
4349
            decode_mb_skip(h);
4350
            return 0;
4351
        }
4352
    }
4353
    if(FRAME_MBAFF){
4354
        if( (s->mb_y&1) == 0 )
4355
            h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
4356
    }
4357

    
4358
    h->prev_mb_skipped= 0;
4359

    
4360
    mb_type= get_ue_golomb(&s->gb);
4361
    if(h->slice_type_nos == FF_B_TYPE){
4362
        if(mb_type < 23){
4363
            partition_count= b_mb_type_info[mb_type].partition_count;
4364
            mb_type=         b_mb_type_info[mb_type].type;
4365
        }else{
4366
            mb_type -= 23;
4367
            goto decode_intra_mb;
4368
        }
4369
    }else if(h->slice_type_nos == FF_P_TYPE){
4370
        if(mb_type < 5){
4371
            partition_count= p_mb_type_info[mb_type].partition_count;
4372
            mb_type=         p_mb_type_info[mb_type].type;
4373
        }else{
4374
            mb_type -= 5;
4375
            goto decode_intra_mb;
4376
        }
4377
    }else{
4378
       assert(h->slice_type_nos == FF_I_TYPE);
4379
        if(h->slice_type == FF_SI_TYPE && mb_type)
4380
            mb_type--;
4381
decode_intra_mb:
4382
        if(mb_type > 25){
4383
            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);
4384
            return -1;
4385
        }
4386
        partition_count=0;
4387
        cbp= i_mb_type_info[mb_type].cbp;
4388
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
4389
        mb_type= i_mb_type_info[mb_type].type;
4390
    }
4391

    
4392
    if(MB_FIELD)
4393
        mb_type |= MB_TYPE_INTERLACED;
4394

    
4395
    h->slice_table[ mb_xy ]= h->slice_num;
4396

    
4397
    if(IS_INTRA_PCM(mb_type)){
4398
        unsigned int x;
4399

    
4400
        // We assume these blocks are very rare so we do not optimize it.
4401
        align_get_bits(&s->gb);
4402

    
4403
        // The pixels are stored in the same order as levels in h->mb array.
4404
        for(x=0; x < (CHROMA ? 384 : 256); x++){
4405
            ((uint8_t*)h->mb)[x]= get_bits(&s->gb, 8);
4406
        }
4407

    
4408
        // In deblocking, the quantizer is 0
4409
        s->current_picture.qscale_table[mb_xy]= 0;
4410
        // All coeffs are present
4411
        memset(h->non_zero_count[mb_xy], 16, 16);
4412

    
4413
        s->current_picture.mb_type[mb_xy]= mb_type;
4414
        return 0;
4415
    }
4416

    
4417
    if(MB_MBAFF){
4418
        h->ref_count[0] <<= 1;
4419
        h->ref_count[1] <<= 1;
4420
    }
4421

    
4422
    fill_caches(h, mb_type, 0);
4423

    
4424
    //mb_pred
4425
    if(IS_INTRA(mb_type)){
4426
        int pred_mode;
4427
//            init_top_left_availability(h);
4428
        if(IS_INTRA4x4(mb_type)){
4429
            int i;
4430
            int di = 1;
4431
            if(dct8x8_allowed && get_bits1(&s->gb)){
4432
                mb_type |= MB_TYPE_8x8DCT;
4433
                di = 4;
4434
            }
4435

    
4436
//                fill_intra4x4_pred_table(h);
4437
            for(i=0; i<16; i+=di){
4438
                int mode= pred_intra_mode(h, i);
4439

    
4440
                if(!get_bits1(&s->gb)){
4441
                    const int rem_mode= get_bits(&s->gb, 3);
4442
                    mode = rem_mode + (rem_mode >= mode);
4443
                }
4444

    
4445
                if(di==4)
4446
                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
4447
                else
4448
                    h->intra4x4_pred_mode_cache[ scan8[i] ] = mode;
4449
            }
4450
            write_back_intra_pred_mode(h);
4451
            if( check_intra4x4_pred_mode(h) < 0)
4452
                return -1;
4453
        }else{
4454
            h->intra16x16_pred_mode= check_intra_pred_mode(h, h->intra16x16_pred_mode);
4455
            if(h->intra16x16_pred_mode < 0)
4456
                return -1;
4457
        }
4458
        if(CHROMA){
4459
            pred_mode= check_intra_pred_mode(h, get_ue_golomb_31(&s->gb));
4460
            if(pred_mode < 0)
4461
                return -1;
4462
            h->chroma_pred_mode= pred_mode;
4463
        }
4464
    }else if(partition_count==4){
4465
        int i, j, sub_partition_count[4], list, ref[2][4];
4466

    
4467
        if(h->slice_type_nos == FF_B_TYPE){
4468