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

    
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/**
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 * @file 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 "i386/h264_i386.h"
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#endif
41

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

    
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/**
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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 chroma_dc_coeff_token_vlc;
53

    
54
static VLC total_zeros_vlc[15];
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static VLC chroma_dc_total_zeros_vlc[3];
56

    
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static VLC run_vlc[6];
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static VLC run7_vlc;
59

    
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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);
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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);
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static void filter_mb_fast( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
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static Picture * remove_long(H264Context *h, int i, int ref_mask);
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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);
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#else
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   return (a&0xFFFF) + (b<<16);
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#endif
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}
73

    
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const uint8_t ff_rem6[52]={
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0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
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};
77

    
78
const uint8_t ff_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,
80
};
81

    
82

    
83
static void fill_caches(H264Context *h, int mb_type, int for_deblock){
84
    MpegEncContext * const s = &h->s;
85
    const int mb_xy= h->mb_xy;
86
    int topleft_xy, top_xy, topright_xy, left_xy[2];
87
    int topleft_type, top_type, topright_type, left_type[2];
88
    int left_block[8];
89
    int topleft_partition= -1;
90
    int i;
91

    
92
    top_xy     = mb_xy  - (s->mb_stride << FIELD_PICTURE);
93

    
94
    //FIXME deblocking could skip the intra and nnz parts.
95
    if(for_deblock && (h->slice_num == 1 || h->slice_table[mb_xy] == h->slice_table[top_xy]) && !FRAME_MBAFF)
96
        return;
97

    
98
    /* Wow, what a mess, why didn't they simplify the interlacing & intra
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     * stuff, I can't imagine that these complex rules are worth it. */
100

    
101
    topleft_xy = top_xy - 1;
102
    topright_xy= top_xy + 1;
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    left_xy[1] = left_xy[0] = mb_xy-1;
104
    left_block[0]= 0;
105
    left_block[1]= 1;
106
    left_block[2]= 2;
107
    left_block[3]= 3;
108
    left_block[4]= 7;
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    left_block[5]= 10;
110
    left_block[6]= 8;
111
    left_block[7]= 11;
112
    if(FRAME_MBAFF){
113
        const int pair_xy          = s->mb_x     + (s->mb_y & ~1)*s->mb_stride;
114
        const int top_pair_xy      = pair_xy     - s->mb_stride;
115
        const int topleft_pair_xy  = top_pair_xy - 1;
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        const int topright_pair_xy = top_pair_xy + 1;
117
        const int topleft_mb_frame_flag  = !IS_INTERLACED(s->current_picture.mb_type[topleft_pair_xy]);
118
        const int top_mb_frame_flag      = !IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
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        const int topright_mb_frame_flag = !IS_INTERLACED(s->current_picture.mb_type[topright_pair_xy]);
120
        const int left_mb_frame_flag = !IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
121
        const int curr_mb_frame_flag = !IS_INTERLACED(mb_type);
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        const int bottom = (s->mb_y & 1);
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        tprintf(s->avctx, "fill_caches: curr_mb_frame_flag:%d, left_mb_frame_flag:%d, topleft_mb_frame_flag:%d, top_mb_frame_flag:%d, topright_mb_frame_flag:%d\n", curr_mb_frame_flag, left_mb_frame_flag, topleft_mb_frame_flag, top_mb_frame_flag, topright_mb_frame_flag);
124
        if (bottom
125
                ? !curr_mb_frame_flag // bottom macroblock
126
                : (!curr_mb_frame_flag && !top_mb_frame_flag) // top macroblock
127
                ) {
128
            top_xy -= s->mb_stride;
129
        }
130
        if (bottom
131
                ? !curr_mb_frame_flag // bottom macroblock
132
                : (!curr_mb_frame_flag && !topleft_mb_frame_flag) // top macroblock
133
                ) {
134
            topleft_xy -= s->mb_stride;
135
        } else if(bottom && curr_mb_frame_flag && !left_mb_frame_flag) {
136
            topleft_xy += s->mb_stride;
137
            // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
138
            topleft_partition = 0;
139
        }
140
        if (bottom
141
                ? !curr_mb_frame_flag // bottom macroblock
142
                : (!curr_mb_frame_flag && !topright_mb_frame_flag) // top macroblock
143
                ) {
144
            topright_xy -= s->mb_stride;
145
        }
146
        if (left_mb_frame_flag != curr_mb_frame_flag) {
147
            left_xy[1] = left_xy[0] = pair_xy - 1;
148
            if (curr_mb_frame_flag) {
149
                if (bottom) {
150
                    left_block[0]= 2;
151
                    left_block[1]= 2;
152
                    left_block[2]= 3;
153
                    left_block[3]= 3;
154
                    left_block[4]= 8;
155
                    left_block[5]= 11;
156
                    left_block[6]= 8;
157
                    left_block[7]= 11;
158
                } else {
159
                    left_block[0]= 0;
160
                    left_block[1]= 0;
161
                    left_block[2]= 1;
162
                    left_block[3]= 1;
163
                    left_block[4]= 7;
164
                    left_block[5]= 10;
165
                    left_block[6]= 7;
166
                    left_block[7]= 10;
167
                }
168
            } else {
169
                left_xy[1] += s->mb_stride;
170
                //left_block[0]= 0;
171
                left_block[1]= 2;
172
                left_block[2]= 0;
173
                left_block[3]= 2;
174
                //left_block[4]= 7;
175
                left_block[5]= 10;
176
                left_block[6]= 7;
177
                left_block[7]= 10;
178
            }
179
        }
180
    }
181

    
182
    h->top_mb_xy = top_xy;
183
    h->left_mb_xy[0] = left_xy[0];
184
    h->left_mb_xy[1] = left_xy[1];
185
    if(for_deblock){
186
        topleft_type = 0;
187
        topright_type = 0;
188
        top_type     = h->slice_table[top_xy     ] < 255 ? s->current_picture.mb_type[top_xy]     : 0;
189
        left_type[0] = h->slice_table[left_xy[0] ] < 255 ? s->current_picture.mb_type[left_xy[0]] : 0;
190
        left_type[1] = h->slice_table[left_xy[1] ] < 255 ? s->current_picture.mb_type[left_xy[1]] : 0;
191

    
192
        if(FRAME_MBAFF && !IS_INTRA(mb_type)){
193
            int list;
194
            int v = *(uint16_t*)&h->non_zero_count[mb_xy][14];
195
            for(i=0; i<16; i++)
196
                h->non_zero_count_cache[scan8[i]] = (v>>i)&1;
197
            for(list=0; list<h->list_count; list++){
198
                if(USES_LIST(mb_type,list)){
199
                    uint32_t *src = (uint32_t*)s->current_picture.motion_val[list][h->mb2b_xy[mb_xy]];
200
                    uint32_t *dst = (uint32_t*)h->mv_cache[list][scan8[0]];
201
                    int8_t *ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
202
                    for(i=0; i<4; i++, dst+=8, src+=h->b_stride){
203
                        dst[0] = src[0];
204
                        dst[1] = src[1];
205
                        dst[2] = src[2];
206
                        dst[3] = src[3];
207
                    }
208
                    *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
209
                    *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = pack16to32(ref[0],ref[1])*0x0101;
210
                    ref += h->b8_stride;
211
                    *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
212
                    *(uint32_t*)&h->ref_cache[list][scan8[10]] = pack16to32(ref[0],ref[1])*0x0101;
213
                }else{
214
                    fill_rectangle(&h-> mv_cache[list][scan8[ 0]], 4, 4, 8, 0, 4);
215
                    fill_rectangle(&h->ref_cache[list][scan8[ 0]], 4, 4, 8, (uint8_t)LIST_NOT_USED, 1);
216
                }
217
            }
218
        }
219
    }else{
220
        topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
221
        top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
222
        topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
223
        left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
224
        left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
225
    }
226

    
227
    if(IS_INTRA(mb_type)){
228
        h->topleft_samples_available=
229
        h->top_samples_available=
230
        h->left_samples_available= 0xFFFF;
231
        h->topright_samples_available= 0xEEEA;
232

    
233
        if(!IS_INTRA(top_type) && (top_type==0 || h->pps.constrained_intra_pred)){
234
            h->topleft_samples_available= 0xB3FF;
235
            h->top_samples_available= 0x33FF;
236
            h->topright_samples_available= 0x26EA;
237
        }
238
        for(i=0; i<2; i++){
239
            if(!IS_INTRA(left_type[i]) && (left_type[i]==0 || h->pps.constrained_intra_pred)){
240
                h->topleft_samples_available&= 0xDF5F;
241
                h->left_samples_available&= 0x5F5F;
242
            }
243
        }
244

    
245
        if(!IS_INTRA(topleft_type) && (topleft_type==0 || h->pps.constrained_intra_pred))
246
            h->topleft_samples_available&= 0x7FFF;
247

    
248
        if(!IS_INTRA(topright_type) && (topright_type==0 || h->pps.constrained_intra_pred))
249
            h->topright_samples_available&= 0xFBFF;
250

    
251
        if(IS_INTRA4x4(mb_type)){
252
            if(IS_INTRA4x4(top_type)){
253
                h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
254
                h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
255
                h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
256
                h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
257
            }else{
258
                int pred;
259
                if(!top_type || (IS_INTER(top_type) && h->pps.constrained_intra_pred))
260
                    pred= -1;
261
                else{
262
                    pred= 2;
263
                }
264
                h->intra4x4_pred_mode_cache[4+8*0]=
265
                h->intra4x4_pred_mode_cache[5+8*0]=
266
                h->intra4x4_pred_mode_cache[6+8*0]=
267
                h->intra4x4_pred_mode_cache[7+8*0]= pred;
268
            }
269
            for(i=0; i<2; i++){
270
                if(IS_INTRA4x4(left_type[i])){
271
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
272
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
273
                }else{
274
                    int pred;
275
                    if(!left_type[i] || (IS_INTER(left_type[i]) && h->pps.constrained_intra_pred))
276
                        pred= -1;
277
                    else{
278
                        pred= 2;
279
                    }
280
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
281
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
282
                }
283
            }
284
        }
285
    }
286

    
287

    
288
/*
289
0 . T T. T T T T
290
1 L . .L . . . .
291
2 L . .L . . . .
292
3 . T TL . . . .
293
4 L . .L . . . .
294
5 L . .. . . . .
295
*/
296
//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
297
    if(top_type){
298
        h->non_zero_count_cache[4+8*0]= h->non_zero_count[top_xy][4];
299
        h->non_zero_count_cache[5+8*0]= h->non_zero_count[top_xy][5];
300
        h->non_zero_count_cache[6+8*0]= h->non_zero_count[top_xy][6];
301
        h->non_zero_count_cache[7+8*0]= h->non_zero_count[top_xy][3];
302

    
303
        h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][9];
304
        h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][8];
305

    
306
        h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][12];
307
        h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][11];
308

    
309
    }else{
310
        h->non_zero_count_cache[4+8*0]=
311
        h->non_zero_count_cache[5+8*0]=
312
        h->non_zero_count_cache[6+8*0]=
313
        h->non_zero_count_cache[7+8*0]=
314

    
315
        h->non_zero_count_cache[1+8*0]=
316
        h->non_zero_count_cache[2+8*0]=
317

    
318
        h->non_zero_count_cache[1+8*3]=
319
        h->non_zero_count_cache[2+8*3]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
320

    
321
    }
322

    
323
    for (i=0; i<2; i++) {
324
        if(left_type[i]){
325
            h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[0+2*i]];
326
            h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[1+2*i]];
327
            h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[4+2*i]];
328
            h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[5+2*i]];
329
        }else{
330
            h->non_zero_count_cache[3+8*1 + 2*8*i]=
331
            h->non_zero_count_cache[3+8*2 + 2*8*i]=
332
            h->non_zero_count_cache[0+8*1 +   8*i]=
333
            h->non_zero_count_cache[0+8*4 +   8*i]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
334
        }
335
    }
336

    
337
    if( h->pps.cabac ) {
338
        // top_cbp
339
        if(top_type) {
340
            h->top_cbp = h->cbp_table[top_xy];
341
        } else if(IS_INTRA(mb_type)) {
342
            h->top_cbp = 0x1C0;
343
        } else {
344
            h->top_cbp = 0;
345
        }
346
        // left_cbp
347
        if (left_type[0]) {
348
            h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
349
        } else if(IS_INTRA(mb_type)) {
350
            h->left_cbp = 0x1C0;
351
        } else {
352
            h->left_cbp = 0;
353
        }
354
        if (left_type[0]) {
355
            h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
356
        }
357
        if (left_type[1]) {
358
            h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
359
        }
360
    }
361

    
362
#if 1
363
    if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
364
        int list;
365
        for(list=0; list<h->list_count; list++){
366
            if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type) && !h->deblocking_filter){
367
                /*if(!h->mv_cache_clean[list]){
368
                    memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
369
                    memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
370
                    h->mv_cache_clean[list]= 1;
371
                }*/
372
                continue;
373
            }
374
            h->mv_cache_clean[list]= 0;
375

    
376
            if(USES_LIST(top_type, list)){
377
                const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
378
                const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
379
                *(uint32_t*)h->mv_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0];
380
                *(uint32_t*)h->mv_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1];
381
                *(uint32_t*)h->mv_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2];
382
                *(uint32_t*)h->mv_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3];
383
                h->ref_cache[list][scan8[0] + 0 - 1*8]=
384
                h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
385
                h->ref_cache[list][scan8[0] + 2 - 1*8]=
386
                h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
387
            }else{
388
                *(uint32_t*)h->mv_cache [list][scan8[0] + 0 - 1*8]=
389
                *(uint32_t*)h->mv_cache [list][scan8[0] + 1 - 1*8]=
390
                *(uint32_t*)h->mv_cache [list][scan8[0] + 2 - 1*8]=
391
                *(uint32_t*)h->mv_cache [list][scan8[0] + 3 - 1*8]= 0;
392
                *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
393
            }
394

    
395
            for(i=0; i<2; i++){
396
                int cache_idx = scan8[0] - 1 + i*2*8;
397
                if(USES_LIST(left_type[i], list)){
398
                    const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
399
                    const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
400
                    *(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]];
401
                    *(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]];
402
                    h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
403
                    h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
404
                }else{
405
                    *(uint32_t*)h->mv_cache [list][cache_idx  ]=
406
                    *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
407
                    h->ref_cache[list][cache_idx  ]=
408
                    h->ref_cache[list][cache_idx+8]= left_type[i] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
409
                }
410
            }
411

    
412
            if((for_deblock || (IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred)) && !FRAME_MBAFF)
413
                continue;
414

    
415
            if(USES_LIST(topleft_type, list)){
416
                const int b_xy = h->mb2b_xy[topleft_xy] + 3 + h->b_stride + (topleft_partition & 2*h->b_stride);
417
                const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + (topleft_partition & h->b8_stride);
418
                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
419
                h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
420
            }else{
421
                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
422
                h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
423
            }
424

    
425
            if(USES_LIST(topright_type, list)){
426
                const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
427
                const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
428
                *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
429
                h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
430
            }else{
431
                *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
432
                h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
433
            }
434

    
435
            if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
436
                continue;
437

    
438
            h->ref_cache[list][scan8[5 ]+1] =
439
            h->ref_cache[list][scan8[7 ]+1] =
440
            h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
441
            h->ref_cache[list][scan8[4 ]] =
442
            h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
443
            *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
444
            *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
445
            *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
446
            *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
447
            *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
448

    
449
            if( h->pps.cabac ) {
450
                /* XXX beurk, Load mvd */
451
                if(USES_LIST(top_type, list)){
452
                    const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
453
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 0];
454
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 1];
455
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 2];
456
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 3];
457
                }else{
458
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 0 - 1*8]=
459
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 1 - 1*8]=
460
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 2 - 1*8]=
461
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 3 - 1*8]= 0;
462
                }
463
                if(USES_LIST(left_type[0], list)){
464
                    const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
465
                    *(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]];
466
                    *(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]];
467
                }else{
468
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
469
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
470
                }
471
                if(USES_LIST(left_type[1], list)){
472
                    const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
473
                    *(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]];
474
                    *(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]];
475
                }else{
476
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
477
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
478
                }
479
                *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
480
                *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
481
                *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
482
                *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
483
                *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
484

    
485
                if(h->slice_type_nos == FF_B_TYPE){
486
                    fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);
487

    
488
                    if(IS_DIRECT(top_type)){
489
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
490
                    }else if(IS_8X8(top_type)){
491
                        int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
492
                        h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
493
                        h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
494
                    }else{
495
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
496
                    }
497

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

    
505
                    if(IS_DIRECT(left_type[1]))
506
                        h->direct_cache[scan8[0] - 1 + 2*8]= 1;
507
                    else if(IS_8X8(left_type[1]))
508
                        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)];
509
                    else
510
                        h->direct_cache[scan8[0] - 1 + 2*8]= 0;
511
                }
512
            }
513

    
514
            if(FRAME_MBAFF){
515
#define MAP_MVS\
516
                    MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
517
                    MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
518
                    MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
519
                    MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
520
                    MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
521
                    MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
522
                    MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
523
                    MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
524
                    MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
525
                    MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
526
                if(MB_FIELD){
527
#define MAP_F2F(idx, mb_type)\
528
                    if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
529
                        h->ref_cache[list][idx] <<= 1;\
530
                        h->mv_cache[list][idx][1] /= 2;\
531
                        h->mvd_cache[list][idx][1] /= 2;\
532
                    }
533
                    MAP_MVS
534
#undef MAP_F2F
535
                }else{
536
#define MAP_F2F(idx, mb_type)\
537
                    if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
538
                        h->ref_cache[list][idx] >>= 1;\
539
                        h->mv_cache[list][idx][1] <<= 1;\
540
                        h->mvd_cache[list][idx][1] <<= 1;\
541
                    }
542
                    MAP_MVS
543
#undef MAP_F2F
544
                }
545
            }
546
        }
547
    }
548
#endif
549

    
550
    h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
551
}
552

    
553
static inline void write_back_intra_pred_mode(H264Context *h){
554
    const int mb_xy= h->mb_xy;
555

    
556
    h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
557
    h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
558
    h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
559
    h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
560
    h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
561
    h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
562
    h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
563
}
564

    
565
/**
566
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
567
 */
568
static inline int check_intra4x4_pred_mode(H264Context *h){
569
    MpegEncContext * const s = &h->s;
570
    static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
571
    static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
572
    int i;
573

    
574
    if(!(h->top_samples_available&0x8000)){
575
        for(i=0; i<4; i++){
576
            int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
577
            if(status<0){
578
                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);
579
                return -1;
580
            } else if(status){
581
                h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
582
            }
583
        }
584
    }
585

    
586
    if(!(h->left_samples_available&0x8000)){
587
        for(i=0; i<4; i++){
588
            int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
589
            if(status<0){
590
                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);
591
                return -1;
592
            } else if(status){
593
                h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
594
            }
595
        }
596
    }
597

    
598
    return 0;
599
} //FIXME cleanup like next
600

    
601
/**
602
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
603
 */
604
static inline int check_intra_pred_mode(H264Context *h, int mode){
605
    MpegEncContext * const s = &h->s;
606
    static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
607
    static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
608

    
609
    if(mode > 6U) {
610
        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);
611
        return -1;
612
    }
613

    
614
    if(!(h->top_samples_available&0x8000)){
615
        mode= top[ mode ];
616
        if(mode<0){
617
            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);
618
            return -1;
619
        }
620
    }
621

    
622
    if(!(h->left_samples_available&0x8000)){
623
        mode= left[ mode ];
624
        if(mode<0){
625
            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);
626
            return -1;
627
        }
628
    }
629

    
630
    return mode;
631
}
632

    
633
/**
634
 * gets the predicted intra4x4 prediction mode.
635
 */
636
static inline int pred_intra_mode(H264Context *h, int n){
637
    const int index8= scan8[n];
638
    const int left= h->intra4x4_pred_mode_cache[index8 - 1];
639
    const int top = h->intra4x4_pred_mode_cache[index8 - 8];
640
    const int min= FFMIN(left, top);
641

    
642
    tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
643

    
644
    if(min<0) return DC_PRED;
645
    else      return min;
646
}
647

    
648
static inline void write_back_non_zero_count(H264Context *h){
649
    const int mb_xy= h->mb_xy;
650

    
651
    h->non_zero_count[mb_xy][0]= h->non_zero_count_cache[7+8*1];
652
    h->non_zero_count[mb_xy][1]= h->non_zero_count_cache[7+8*2];
653
    h->non_zero_count[mb_xy][2]= h->non_zero_count_cache[7+8*3];
654
    h->non_zero_count[mb_xy][3]= h->non_zero_count_cache[7+8*4];
655
    h->non_zero_count[mb_xy][4]= h->non_zero_count_cache[4+8*4];
656
    h->non_zero_count[mb_xy][5]= h->non_zero_count_cache[5+8*4];
657
    h->non_zero_count[mb_xy][6]= h->non_zero_count_cache[6+8*4];
658

    
659
    h->non_zero_count[mb_xy][9]= h->non_zero_count_cache[1+8*2];
660
    h->non_zero_count[mb_xy][8]= h->non_zero_count_cache[2+8*2];
661
    h->non_zero_count[mb_xy][7]= h->non_zero_count_cache[2+8*1];
662

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

    
667
    if(FRAME_MBAFF){
668
        // store all luma nnzs, for deblocking
669
        int v = 0, i;
670
        for(i=0; i<16; i++)
671
            v += (!!h->non_zero_count_cache[scan8[i]]) << i;
672
        *(uint16_t*)&h->non_zero_count[mb_xy][14] = v;
673
    }
674
}
675

    
676
/**
677
 * gets the predicted number of non-zero coefficients.
678
 * @param n block index
679
 */
680
static inline int pred_non_zero_count(H264Context *h, int n){
681
    const int index8= scan8[n];
682
    const int left= h->non_zero_count_cache[index8 - 1];
683
    const int top = h->non_zero_count_cache[index8 - 8];
684
    int i= left + top;
685

    
686
    if(i<64) i= (i+1)>>1;
687

    
688
    tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
689

    
690
    return i&31;
691
}
692

    
693
static inline int fetch_diagonal_mv(H264Context *h, const int16_t **C, int i, int list, int part_width){
694
    const int topright_ref= h->ref_cache[list][ i - 8 + part_width ];
695
    MpegEncContext *s = &h->s;
696

    
697
    /* there is no consistent mapping of mvs to neighboring locations that will
698
     * make mbaff happy, so we can't move all this logic to fill_caches */
699
    if(FRAME_MBAFF){
700
        const uint32_t *mb_types = s->current_picture_ptr->mb_type;
701
        const int16_t *mv;
702
        *(uint32_t*)h->mv_cache[list][scan8[0]-2] = 0;
703
        *C = h->mv_cache[list][scan8[0]-2];
704

    
705
        if(!MB_FIELD
706
           && (s->mb_y&1) && i < scan8[0]+8 && topright_ref != PART_NOT_AVAILABLE){
707
            int topright_xy = s->mb_x + (s->mb_y-1)*s->mb_stride + (i == scan8[0]+3);
708
            if(IS_INTERLACED(mb_types[topright_xy])){
709
#define SET_DIAG_MV(MV_OP, REF_OP, X4, Y4)\
710
                const int x4 = X4, y4 = Y4;\
711
                const int mb_type = mb_types[(x4>>2)+(y4>>2)*s->mb_stride];\
712
                if(!USES_LIST(mb_type,list))\
713
                    return LIST_NOT_USED;\
714
                mv = s->current_picture_ptr->motion_val[list][x4 + y4*h->b_stride];\
715
                h->mv_cache[list][scan8[0]-2][0] = mv[0];\
716
                h->mv_cache[list][scan8[0]-2][1] = mv[1] MV_OP;\
717
                return s->current_picture_ptr->ref_index[list][(x4>>1) + (y4>>1)*h->b8_stride] REF_OP;
718

    
719
                SET_DIAG_MV(*2, >>1, s->mb_x*4+(i&7)-4+part_width, s->mb_y*4-1);
720
            }
721
        }
722
        if(topright_ref == PART_NOT_AVAILABLE
723
           && ((s->mb_y&1) || i >= scan8[0]+8) && (i&7)==4
724
           && h->ref_cache[list][scan8[0]-1] != PART_NOT_AVAILABLE){
725
            if(!MB_FIELD
726
               && IS_INTERLACED(mb_types[h->left_mb_xy[0]])){
727
                SET_DIAG_MV(*2, >>1, s->mb_x*4-1, (s->mb_y|1)*4+(s->mb_y&1)*2+(i>>4)-1);
728
            }
729
            if(MB_FIELD
730
               && !IS_INTERLACED(mb_types[h->left_mb_xy[0]])
731
               && i >= scan8[0]+8){
732
                // left shift will turn LIST_NOT_USED into PART_NOT_AVAILABLE, but that's OK.
733
                SET_DIAG_MV(/2, <<1, s->mb_x*4-1, (s->mb_y&~1)*4 - 1 + ((i-scan8[0])>>3)*2);
734
            }
735
        }
736
#undef SET_DIAG_MV
737
    }
738

    
739
    if(topright_ref != PART_NOT_AVAILABLE){
740
        *C= h->mv_cache[list][ i - 8 + part_width ];
741
        return topright_ref;
742
    }else{
743
        tprintf(s->avctx, "topright MV not available\n");
744

    
745
        *C= h->mv_cache[list][ i - 8 - 1 ];
746
        return h->ref_cache[list][ i - 8 - 1 ];
747
    }
748
}
749

    
750
/**
751
 * gets the predicted MV.
752
 * @param n the block index
753
 * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
754
 * @param mx the x component of the predicted motion vector
755
 * @param my the y component of the predicted motion vector
756
 */
757
static inline void pred_motion(H264Context * const h, int n, int part_width, int list, int ref, int * const mx, int * const my){
758
    const int index8= scan8[n];
759
    const int top_ref=      h->ref_cache[list][ index8 - 8 ];
760
    const int left_ref=     h->ref_cache[list][ index8 - 1 ];
761
    const int16_t * const A= h->mv_cache[list][ index8 - 1 ];
762
    const int16_t * const B= h->mv_cache[list][ index8 - 8 ];
763
    const int16_t * C;
764
    int diagonal_ref, match_count;
765

    
766
    assert(part_width==1 || part_width==2 || part_width==4);
767

    
768
/* mv_cache
769
  B . . A T T T T
770
  U . . L . . , .
771
  U . . L . . . .
772
  U . . L . . , .
773
  . . . L . . . .
774
*/
775

    
776
    diagonal_ref= fetch_diagonal_mv(h, &C, index8, list, part_width);
777
    match_count= (diagonal_ref==ref) + (top_ref==ref) + (left_ref==ref);
778
    tprintf(h->s.avctx, "pred_motion match_count=%d\n", match_count);
779
    if(match_count > 1){ //most common
780
        *mx= mid_pred(A[0], B[0], C[0]);
781
        *my= mid_pred(A[1], B[1], C[1]);
782
    }else if(match_count==1){
783
        if(left_ref==ref){
784
            *mx= A[0];
785
            *my= A[1];
786
        }else if(top_ref==ref){
787
            *mx= B[0];
788
            *my= B[1];
789
        }else{
790
            *mx= C[0];
791
            *my= C[1];
792
        }
793
    }else{
794
        if(top_ref == PART_NOT_AVAILABLE && diagonal_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){
795
            *mx= A[0];
796
            *my= A[1];
797
        }else{
798
            *mx= mid_pred(A[0], B[0], C[0]);
799
            *my= mid_pred(A[1], B[1], C[1]);
800
        }
801
    }
802

    
803
    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);
804
}
805

    
806
/**
807
 * gets the directionally predicted 16x8 MV.
808
 * @param n the block index
809
 * @param mx the x component of the predicted motion vector
810
 * @param my the y component of the predicted motion vector
811
 */
812
static inline void pred_16x8_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
813
    if(n==0){
814
        const int top_ref=      h->ref_cache[list][ scan8[0] - 8 ];
815
        const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];
816

    
817
        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);
818

    
819
        if(top_ref == ref){
820
            *mx= B[0];
821
            *my= B[1];
822
            return;
823
        }
824
    }else{
825
        const int left_ref=     h->ref_cache[list][ scan8[8] - 1 ];
826
        const int16_t * const A= h->mv_cache[list][ scan8[8] - 1 ];
827

    
828
        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);
829

    
830
        if(left_ref == ref){
831
            *mx= A[0];
832
            *my= A[1];
833
            return;
834
        }
835
    }
836

    
837
    //RARE
838
    pred_motion(h, n, 4, list, ref, mx, my);
839
}
840

    
841
/**
842
 * gets the directionally predicted 8x16 MV.
843
 * @param n the block index
844
 * @param mx the x component of the predicted motion vector
845
 * @param my the y component of the predicted motion vector
846
 */
847
static inline void pred_8x16_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
848
    if(n==0){
849
        const int left_ref=      h->ref_cache[list][ scan8[0] - 1 ];
850
        const int16_t * const A=  h->mv_cache[list][ scan8[0] - 1 ];
851

    
852
        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);
853

    
854
        if(left_ref == ref){
855
            *mx= A[0];
856
            *my= A[1];
857
            return;
858
        }
859
    }else{
860
        const int16_t * C;
861
        int diagonal_ref;
862

    
863
        diagonal_ref= fetch_diagonal_mv(h, &C, scan8[4], list, 2);
864

    
865
        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);
866

    
867
        if(diagonal_ref == ref){
868
            *mx= C[0];
869
            *my= C[1];
870
            return;
871
        }
872
    }
873

    
874
    //RARE
875
    pred_motion(h, n, 2, list, ref, mx, my);
876
}
877

    
878
static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my){
879
    const int top_ref = h->ref_cache[0][ scan8[0] - 8 ];
880
    const int left_ref= h->ref_cache[0][ scan8[0] - 1 ];
881

    
882
    tprintf(h->s.avctx, "pred_pskip: (%d) (%d) at %2d %2d\n", top_ref, left_ref, h->s.mb_x, h->s.mb_y);
883

    
884
    if(top_ref == PART_NOT_AVAILABLE || left_ref == PART_NOT_AVAILABLE
885
       || (top_ref == 0  && *(uint32_t*)h->mv_cache[0][ scan8[0] - 8 ] == 0)
886
       || (left_ref == 0 && *(uint32_t*)h->mv_cache[0][ scan8[0] - 1 ] == 0)){
887

    
888
        *mx = *my = 0;
889
        return;
890
    }
891

    
892
    pred_motion(h, 0, 4, 0, 0, mx, my);
893

    
894
    return;
895
}
896

    
897
static inline void direct_dist_scale_factor(H264Context * const h){
898
    const int poc = h->s.current_picture_ptr->poc;
899
    const int poc1 = h->ref_list[1][0].poc;
900
    int i;
901
    for(i=0; i<h->ref_count[0]; i++){
902
        int poc0 = h->ref_list[0][i].poc;
903
        int td = av_clip(poc1 - poc0, -128, 127);
904
        if(td == 0 /* FIXME || pic0 is a long-term ref */){
905
            h->dist_scale_factor[i] = 256;
906
        }else{
907
            int tb = av_clip(poc - poc0, -128, 127);
908
            int tx = (16384 + (FFABS(td) >> 1)) / td;
909
            h->dist_scale_factor[i] = av_clip((tb*tx + 32) >> 6, -1024, 1023);
910
        }
911
    }
912
    if(FRAME_MBAFF){
913
        for(i=0; i<h->ref_count[0]; i++){
914
            h->dist_scale_factor_field[2*i] =
915
            h->dist_scale_factor_field[2*i+1] = h->dist_scale_factor[i];
916
        }
917
    }
918
}
919
static inline void direct_ref_list_init(H264Context * const h){
920
    MpegEncContext * const s = &h->s;
921
    Picture * const ref1 = &h->ref_list[1][0];
922
    Picture * const cur = s->current_picture_ptr;
923
    int list, i, j;
924
    if(cur->pict_type == FF_I_TYPE)
925
        cur->ref_count[0] = 0;
926
    if(cur->pict_type != FF_B_TYPE)
927
        cur->ref_count[1] = 0;
928
    for(list=0; list<2; list++){
929
        cur->ref_count[list] = h->ref_count[list];
930
        for(j=0; j<h->ref_count[list]; j++)
931
            cur->ref_poc[list][j] = h->ref_list[list][j].poc;
932
    }
933
    if(cur->pict_type != FF_B_TYPE || h->direct_spatial_mv_pred)
934
        return;
935
    for(list=0; list<2; list++){
936
        for(i=0; i<ref1->ref_count[list]; i++){
937
            const int poc = ref1->ref_poc[list][i];
938
            h->map_col_to_list0[list][i] = 0; /* bogus; fills in for missing frames */
939
            for(j=0; j<h->ref_count[list]; j++)
940
                if(h->ref_list[list][j].poc == poc){
941
                    h->map_col_to_list0[list][i] = j;
942
                    break;
943
                }
944
        }
945
    }
946
    if(FRAME_MBAFF){
947
        for(list=0; list<2; list++){
948
            for(i=0; i<ref1->ref_count[list]; i++){
949
                j = h->map_col_to_list0[list][i];
950
                h->map_col_to_list0_field[list][2*i] = 2*j;
951
                h->map_col_to_list0_field[list][2*i+1] = 2*j+1;
952
            }
953
        }
954
    }
955
}
956

    
957
static inline void pred_direct_motion(H264Context * const h, int *mb_type){
958
    MpegEncContext * const s = &h->s;
959
    const int mb_xy =   h->mb_xy;
960
    const int b8_xy = 2*s->mb_x + 2*s->mb_y*h->b8_stride;
961
    const int b4_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
962
    const int mb_type_col = h->ref_list[1][0].mb_type[mb_xy];
963
    const int16_t (*l1mv0)[2] = (const int16_t (*)[2]) &h->ref_list[1][0].motion_val[0][b4_xy];
964
    const int16_t (*l1mv1)[2] = (const int16_t (*)[2]) &h->ref_list[1][0].motion_val[1][b4_xy];
965
    const int8_t *l1ref0 = &h->ref_list[1][0].ref_index[0][b8_xy];
966
    const int8_t *l1ref1 = &h->ref_list[1][0].ref_index[1][b8_xy];
967
    const int is_b8x8 = IS_8X8(*mb_type);
968
    unsigned int sub_mb_type;
969
    int i8, i4;
970

    
971
#define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
972
    if(IS_8X8(mb_type_col) && !h->sps.direct_8x8_inference_flag){
973
        /* FIXME save sub mb types from previous frames (or derive from MVs)
974
         * so we know exactly what block size to use */
975
        sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
976
        *mb_type =    MB_TYPE_8x8|MB_TYPE_L0L1;
977
    }else if(!is_b8x8 && (mb_type_col & MB_TYPE_16x16_OR_INTRA)){
978
        sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
979
        *mb_type =    MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
980
    }else{
981
        sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
982
        *mb_type =    MB_TYPE_8x8|MB_TYPE_L0L1;
983
    }
984
    if(!is_b8x8)
985
        *mb_type |= MB_TYPE_DIRECT2;
986
    if(MB_FIELD)
987
        *mb_type |= MB_TYPE_INTERLACED;
988

    
989
    tprintf(s->avctx, "mb_type = %08x, sub_mb_type = %08x, is_b8x8 = %d, mb_type_col = %08x\n", *mb_type, sub_mb_type, is_b8x8, mb_type_col);
990

    
991
    if(h->direct_spatial_mv_pred){
992
        int ref[2];
993
        int mv[2][2];
994
        int list;
995

    
996
        /* FIXME interlacing + spatial direct uses wrong colocated block positions */
997

    
998
        /* ref = min(neighbors) */
999
        for(list=0; list<2; list++){
1000
            int refa = h->ref_cache[list][scan8[0] - 1];
1001
            int refb = h->ref_cache[list][scan8[0] - 8];
1002
            int refc = h->ref_cache[list][scan8[0] - 8 + 4];
1003
            if(refc == -2)
1004
                refc = h->ref_cache[list][scan8[0] - 8 - 1];
1005
            ref[list] = FFMIN3((unsigned)refa, (unsigned)refb, (unsigned)refc);
1006
            if(ref[list] < 0)
1007
                ref[list] = -1;
1008
        }
1009

    
1010
        if(ref[0] < 0 && ref[1] < 0){
1011
            ref[0] = ref[1] = 0;
1012
            mv[0][0] = mv[0][1] =
1013
            mv[1][0] = mv[1][1] = 0;
1014
        }else{
1015
            for(list=0; list<2; list++){
1016
                if(ref[list] >= 0)
1017
                    pred_motion(h, 0, 4, list, ref[list], &mv[list][0], &mv[list][1]);
1018
                else
1019
                    mv[list][0] = mv[list][1] = 0;
1020
            }
1021
        }
1022

    
1023
        if(ref[1] < 0){
1024
            if(!is_b8x8)
1025
                *mb_type &= ~MB_TYPE_L1;
1026
            sub_mb_type &= ~MB_TYPE_L1;
1027
        }else if(ref[0] < 0){
1028
            if(!is_b8x8)
1029
                *mb_type &= ~MB_TYPE_L0;
1030
            sub_mb_type &= ~MB_TYPE_L0;
1031
        }
1032

    
1033
        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col)){
1034
            int pair_xy = s->mb_x + (s->mb_y&~1)*s->mb_stride;
1035
            int mb_types_col[2];
1036
            int b8_stride = h->b8_stride;
1037
            int b4_stride = h->b_stride;
1038

    
1039
            *mb_type = (*mb_type & ~MB_TYPE_16x16) | MB_TYPE_8x8;
1040

    
1041
            if(IS_INTERLACED(*mb_type)){
1042
                mb_types_col[0] = h->ref_list[1][0].mb_type[pair_xy];
1043
                mb_types_col[1] = h->ref_list[1][0].mb_type[pair_xy+s->mb_stride];
1044
                if(s->mb_y&1){
1045
                    l1ref0 -= 2*b8_stride;
1046
                    l1ref1 -= 2*b8_stride;
1047
                    l1mv0 -= 4*b4_stride;
1048
                    l1mv1 -= 4*b4_stride;
1049
                }
1050
                b8_stride *= 3;
1051
                b4_stride *= 6;
1052
            }else{
1053
                int cur_poc = s->current_picture_ptr->poc;
1054
                int *col_poc = h->ref_list[1]->field_poc;
1055
                int col_parity = FFABS(col_poc[0] - cur_poc) >= FFABS(col_poc[1] - cur_poc);
1056
                int dy = 2*col_parity - (s->mb_y&1);
1057
                mb_types_col[0] =
1058
                mb_types_col[1] = h->ref_list[1][0].mb_type[pair_xy + col_parity*s->mb_stride];
1059
                l1ref0 += dy*b8_stride;
1060
                l1ref1 += dy*b8_stride;
1061
                l1mv0 += 2*dy*b4_stride;
1062
                l1mv1 += 2*dy*b4_stride;
1063
                b8_stride = 0;
1064
            }
1065

    
1066
            for(i8=0; i8<4; i8++){
1067
                int x8 = i8&1;
1068
                int y8 = i8>>1;
1069
                int xy8 = x8+y8*b8_stride;
1070
                int xy4 = 3*x8+y8*b4_stride;
1071
                int a=0, b=0;
1072

    
1073
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1074
                    continue;
1075
                h->sub_mb_type[i8] = sub_mb_type;
1076

    
1077
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1078
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1079
                if(!IS_INTRA(mb_types_col[y8])
1080
                   && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
1081
                       || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
1082
                    if(ref[0] > 0)
1083
                        a= pack16to32(mv[0][0],mv[0][1]);
1084
                    if(ref[1] > 0)
1085
                        b= pack16to32(mv[1][0],mv[1][1]);
1086
                }else{
1087
                    a= pack16to32(mv[0][0],mv[0][1]);
1088
                    b= pack16to32(mv[1][0],mv[1][1]);
1089
                }
1090
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
1091
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
1092
            }
1093
        }else if(IS_16X16(*mb_type)){
1094
            int a=0, b=0;
1095

    
1096
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
1097
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
1098
            if(!IS_INTRA(mb_type_col)
1099
               && (   (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
1100
                   || (l1ref0[0]  < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
1101
                       && (h->x264_build>33 || !h->x264_build)))){
1102
                if(ref[0] > 0)
1103
                    a= pack16to32(mv[0][0],mv[0][1]);
1104
                if(ref[1] > 0)
1105
                    b= pack16to32(mv[1][0],mv[1][1]);
1106
            }else{
1107
                a= pack16to32(mv[0][0],mv[0][1]);
1108
                b= pack16to32(mv[1][0],mv[1][1]);
1109
            }
1110
            fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
1111
            fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
1112
        }else{
1113
            for(i8=0; i8<4; i8++){
1114
                const int x8 = i8&1;
1115
                const int y8 = i8>>1;
1116

    
1117
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1118
                    continue;
1119
                h->sub_mb_type[i8] = sub_mb_type;
1120

    
1121
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mv[0][0],mv[0][1]), 4);
1122
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mv[1][0],mv[1][1]), 4);
1123
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1124
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1125

    
1126
                /* col_zero_flag */
1127
                if(!IS_INTRA(mb_type_col) && (   l1ref0[x8 + y8*h->b8_stride] == 0
1128
                                              || (l1ref0[x8 + y8*h->b8_stride] < 0 && l1ref1[x8 + y8*h->b8_stride] == 0
1129
                                                  && (h->x264_build>33 || !h->x264_build)))){
1130
                    const int16_t (*l1mv)[2]= l1ref0[x8 + y8*h->b8_stride] == 0 ? l1mv0 : l1mv1;
1131
                    if(IS_SUB_8X8(sub_mb_type)){
1132
                        const int16_t *mv_col = l1mv[x8*3 + y8*3*h->b_stride];
1133
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1134
                            if(ref[0] == 0)
1135
                                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1136
                            if(ref[1] == 0)
1137
                                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1138
                        }
1139
                    }else
1140
                    for(i4=0; i4<4; i4++){
1141
                        const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*h->b_stride];
1142
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1143
                            if(ref[0] == 0)
1144
                                *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
1145
                            if(ref[1] == 0)
1146
                                *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] = 0;
1147
                        }
1148
                    }
1149
                }
1150
            }
1151
        }
1152
    }else{ /* direct temporal mv pred */
1153
        const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
1154
        const int *dist_scale_factor = h->dist_scale_factor;
1155

    
1156
        if(FRAME_MBAFF){
1157
            if(IS_INTERLACED(*mb_type)){
1158
                map_col_to_list0[0] = h->map_col_to_list0_field[0];
1159
                map_col_to_list0[1] = h->map_col_to_list0_field[1];
1160
                dist_scale_factor = h->dist_scale_factor_field;
1161
            }
1162
            if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col)){
1163
                /* FIXME assumes direct_8x8_inference == 1 */
1164
                const int pair_xy = s->mb_x + (s->mb_y&~1)*s->mb_stride;
1165
                int mb_types_col[2];
1166
                int y_shift;
1167

    
1168
                *mb_type = MB_TYPE_8x8|MB_TYPE_L0L1
1169
                         | (is_b8x8 ? 0 : MB_TYPE_DIRECT2)
1170
                         | (*mb_type & MB_TYPE_INTERLACED);
1171
                sub_mb_type = MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_16x16;
1172

    
1173
                if(IS_INTERLACED(*mb_type)){
1174
                    /* frame to field scaling */
1175
                    mb_types_col[0] = h->ref_list[1][0].mb_type[pair_xy];
1176
                    mb_types_col[1] = h->ref_list[1][0].mb_type[pair_xy+s->mb_stride];
1177
                    if(s->mb_y&1){
1178
                        l1ref0 -= 2*h->b8_stride;
1179
                        l1ref1 -= 2*h->b8_stride;
1180
                        l1mv0 -= 4*h->b_stride;
1181
                        l1mv1 -= 4*h->b_stride;
1182
                    }
1183
                    y_shift = 0;
1184

    
1185
                    if(   (mb_types_col[0] & MB_TYPE_16x16_OR_INTRA)
1186
                       && (mb_types_col[1] & MB_TYPE_16x16_OR_INTRA)
1187
                       && !is_b8x8)
1188
                        *mb_type |= MB_TYPE_16x8;
1189
                    else
1190
                        *mb_type |= MB_TYPE_8x8;
1191
                }else{
1192
                    /* field to frame scaling */
1193
                    /* col_mb_y = (mb_y&~1) + (topAbsDiffPOC < bottomAbsDiffPOC ? 0 : 1)
1194
                     * but in MBAFF, top and bottom POC are equal */
1195
                    int dy = (s->mb_y&1) ? 1 : 2;
1196
                    mb_types_col[0] =
1197
                    mb_types_col[1] = h->ref_list[1][0].mb_type[pair_xy+s->mb_stride];
1198
                    l1ref0 += dy*h->b8_stride;
1199
                    l1ref1 += dy*h->b8_stride;
1200
                    l1mv0 += 2*dy*h->b_stride;
1201
                    l1mv1 += 2*dy*h->b_stride;
1202
                    y_shift = 2;
1203

    
1204
                    if((mb_types_col[0] & (MB_TYPE_16x16_OR_INTRA|MB_TYPE_16x8))
1205
                       && !is_b8x8)
1206
                        *mb_type |= MB_TYPE_16x16;
1207
                    else
1208
                        *mb_type |= MB_TYPE_8x8;
1209
                }
1210

    
1211
                for(i8=0; i8<4; i8++){
1212
                    const int x8 = i8&1;
1213
                    const int y8 = i8>>1;
1214
                    int ref0, scale;
1215
                    const int16_t (*l1mv)[2]= l1mv0;
1216

    
1217
                    if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1218
                        continue;
1219
                    h->sub_mb_type[i8] = sub_mb_type;
1220

    
1221
                    fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1222
                    if(IS_INTRA(mb_types_col[y8])){
1223
                        fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1224
                        fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1225
                        fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1226
                        continue;
1227
                    }
1228

    
1229
                    ref0 = l1ref0[x8 + (y8*2>>y_shift)*h->b8_stride];
1230
                    if(ref0 >= 0)
1231
                        ref0 = map_col_to_list0[0][ref0*2>>y_shift];
1232
                    else{
1233
                        ref0 = map_col_to_list0[1][l1ref1[x8 + (y8*2>>y_shift)*h->b8_stride]*2>>y_shift];
1234
                        l1mv= l1mv1;
1235
                    }
1236
                    scale = dist_scale_factor[ref0];
1237
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1238

    
1239
                    {
1240
                        const int16_t *mv_col = l1mv[x8*3 + (y8*6>>y_shift)*h->b_stride];
1241
                        int my_col = (mv_col[1]<<y_shift)/2;
1242
                        int mx = (scale * mv_col[0] + 128) >> 8;
1243
                        int my = (scale * my_col + 128) >> 8;
1244
                        fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1245
                        fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
1246
                    }
1247
                }
1248
                return;
1249
            }
1250
        }
1251

    
1252
        /* one-to-one mv scaling */
1253

    
1254
        if(IS_16X16(*mb_type)){
1255
            int ref, mv0, mv1;
1256

    
1257
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
1258
            if(IS_INTRA(mb_type_col)){
1259
                ref=mv0=mv1=0;
1260
            }else{
1261
                const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0]]
1262
                                                : map_col_to_list0[1][l1ref1[0]];
1263
                const int scale = dist_scale_factor[ref0];
1264
                const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
1265
                int mv_l0[2];
1266
                mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1267
                mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1268
                ref= ref0;
1269
                mv0= pack16to32(mv_l0[0],mv_l0[1]);
1270
                mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1271
            }
1272
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
1273
            fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
1274
            fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
1275
        }else{
1276
            for(i8=0; i8<4; i8++){
1277
                const int x8 = i8&1;
1278
                const int y8 = i8>>1;
1279
                int ref0, scale;
1280
                const int16_t (*l1mv)[2]= l1mv0;
1281

    
1282
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1283
                    continue;
1284
                h->sub_mb_type[i8] = sub_mb_type;
1285
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1286
                if(IS_INTRA(mb_type_col)){
1287
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1288
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1289
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1290
                    continue;
1291
                }
1292

    
1293
                ref0 = l1ref0[x8 + y8*h->b8_stride];
1294
                if(ref0 >= 0)
1295
                    ref0 = map_col_to_list0[0][ref0];
1296
                else{
1297
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*h->b8_stride]];
1298
                    l1mv= l1mv1;
1299
                }
1300
                scale = dist_scale_factor[ref0];
1301

    
1302
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1303
                if(IS_SUB_8X8(sub_mb_type)){
1304
                    const int16_t *mv_col = l1mv[x8*3 + y8*3*h->b_stride];
1305
                    int mx = (scale * mv_col[0] + 128) >> 8;
1306
                    int my = (scale * mv_col[1] + 128) >> 8;
1307
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1308
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
1309
                }else
1310
                for(i4=0; i4<4; i4++){
1311
                    const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*h->b_stride];
1312
                    int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
1313
                    mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1314
                    mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1315
                    *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] =
1316
                        pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1317
                }
1318
            }
1319
        }
1320
    }
1321
}
1322

    
1323
static inline void write_back_motion(H264Context *h, int mb_type){
1324
    MpegEncContext * const s = &h->s;
1325
    const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1326
    const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1327
    int list;
1328

    
1329
    if(!USES_LIST(mb_type, 0))
1330
        fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);
1331

    
1332
    for(list=0; list<h->list_count; list++){
1333
        int y;
1334
        if(!USES_LIST(mb_type, list))
1335
            continue;
1336

    
1337
        for(y=0; y<4; y++){
1338
            *(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];
1339
            *(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];
1340
        }
1341
        if( h->pps.cabac ) {
1342
            if(IS_SKIP(mb_type))
1343
                fill_rectangle(h->mvd_table[list][b_xy], 4, 4, h->b_stride, 0, 4);
1344
            else
1345
            for(y=0; y<4; y++){
1346
                *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+0 + 8*y];
1347
                *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+2 + 8*y];
1348
            }
1349
        }
1350

    
1351
        {
1352
            int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1353
            ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
1354
            ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
1355
            ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
1356
            ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
1357
        }
1358
    }
1359

    
1360
    if(h->slice_type_nos == FF_B_TYPE && h->pps.cabac){
1361
        if(IS_8X8(mb_type)){
1362
            uint8_t *direct_table = &h->direct_table[b8_xy];
1363
            direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
1364
            direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
1365
            direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1366
        }
1367
    }
1368
}
1369

    
1370
/**
1371
 * Decodes a network abstraction layer unit.
1372
 * @param consumed is the number of bytes used as input
1373
 * @param length is the length of the array
1374
 * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
1375
 * @returns decoded bytes, might be src+1 if no escapes
1376
 */
1377
static const uint8_t *decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
1378
    int i, si, di;
1379
    uint8_t *dst;
1380
    int bufidx;
1381

    
1382
//    src[0]&0x80;                //forbidden bit
1383
    h->nal_ref_idc= src[0]>>5;
1384
    h->nal_unit_type= src[0]&0x1F;
1385

    
1386
    src++; length--;
1387
#if 0
1388
    for(i=0; i<length; i++)
1389
        printf("%2X ", src[i]);
1390
#endif
1391
    for(i=0; i+1<length; i+=2){
1392
        if(src[i]) continue;
1393
        if(i>0 && src[i-1]==0) i--;
1394
        if(i+2<length && src[i+1]==0 && src[i+2]<=3){
1395
            if(src[i+2]!=3){
1396
                /* startcode, so we must be past the end */
1397
                length=i;
1398
            }
1399
            break;
1400
        }
1401
    }
1402

    
1403
    if(i>=length-1){ //no escaped 0
1404
        *dst_length= length;
1405
        *consumed= length+1; //+1 for the header
1406
        return src;
1407
    }
1408

    
1409
    bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
1410
    h->rbsp_buffer[bufidx]= av_fast_realloc(h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length);
1411
    dst= h->rbsp_buffer[bufidx];
1412

    
1413
    if (dst == NULL){
1414
        return NULL;
1415
    }
1416

    
1417
//printf("decoding esc\n");
1418
    si=di=0;
1419
    while(si<length){
1420
        //remove escapes (very rare 1:2^22)
1421
        if(si+2<length && src[si]==0 && src[si+1]==0 && src[si+2]<=3){
1422
            if(src[si+2]==3){ //escape
1423
                dst[di++]= 0;
1424
                dst[di++]= 0;
1425
                si+=3;
1426
                continue;
1427
            }else //next start code
1428
                break;
1429
        }
1430

    
1431
        dst[di++]= src[si++];
1432
    }
1433

    
1434
    *dst_length= di;
1435
    *consumed= si + 1;//+1 for the header
1436
//FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
1437
    return dst;
1438
}
1439

    
1440
/**
1441
 * identifies the exact end of the bitstream
1442
 * @return the length of the trailing, or 0 if damaged
1443
 */
1444
static int decode_rbsp_trailing(H264Context *h, const uint8_t *src){
1445
    int v= *src;
1446
    int r;
1447

    
1448
    tprintf(h->s.avctx, "rbsp trailing %X\n", v);
1449

    
1450
    for(r=1; r<9; r++){
1451
        if(v&1) return r;
1452
        v>>=1;
1453
    }
1454
    return 0;
1455
}
1456

    
1457
/**
1458
 * IDCT transforms the 16 dc values and dequantizes them.
1459
 * @param qp quantization parameter
1460
 */
1461
static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1462
#define stride 16
1463
    int i;
1464
    int temp[16]; //FIXME check if this is a good idea
1465
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1466
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1467

    
1468
//memset(block, 64, 2*256);
1469
//return;
1470
    for(i=0; i<4; i++){
1471
        const int offset= y_offset[i];
1472
        const int z0= block[offset+stride*0] + block[offset+stride*4];
1473
        const int z1= block[offset+stride*0] - block[offset+stride*4];
1474
        const int z2= block[offset+stride*1] - block[offset+stride*5];
1475
        const int z3= block[offset+stride*1] + block[offset+stride*5];
1476

    
1477
        temp[4*i+0]= z0+z3;
1478
        temp[4*i+1]= z1+z2;
1479
        temp[4*i+2]= z1-z2;
1480
        temp[4*i+3]= z0-z3;
1481
    }
1482

    
1483
    for(i=0; i<4; i++){
1484
        const int offset= x_offset[i];
1485
        const int z0= temp[4*0+i] + temp[4*2+i];
1486
        const int z1= temp[4*0+i] - temp[4*2+i];
1487
        const int z2= temp[4*1+i] - temp[4*3+i];
1488
        const int z3= temp[4*1+i] + temp[4*3+i];
1489

    
1490
        block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
1491
        block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
1492
        block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
1493
        block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
1494
    }
1495
}
1496

    
1497
#if 0
1498
/**
1499
 * DCT transforms the 16 dc values.
1500
 * @param qp quantization parameter ??? FIXME
1501
 */
1502
static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
1503
//    const int qmul= dequant_coeff[qp][0];
1504
    int i;
1505
    int temp[16]; //FIXME check if this is a good idea
1506
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1507
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1508

1509
    for(i=0; i<4; i++){
1510
        const int offset= y_offset[i];
1511
        const int z0= block[offset+stride*0] + block[offset+stride*4];
1512
        const int z1= block[offset+stride*0] - block[offset+stride*4];
1513
        const int z2= block[offset+stride*1] - block[offset+stride*5];
1514
        const int z3= block[offset+stride*1] + block[offset+stride*5];
1515

1516
        temp[4*i+0]= z0+z3;
1517
        temp[4*i+1]= z1+z2;
1518
        temp[4*i+2]= z1-z2;
1519
        temp[4*i+3]= z0-z3;
1520
    }
1521

1522
    for(i=0; i<4; i++){
1523
        const int offset= x_offset[i];
1524
        const int z0= temp[4*0+i] + temp[4*2+i];
1525
        const int z1= temp[4*0+i] - temp[4*2+i];
1526
        const int z2= temp[4*1+i] - temp[4*3+i];
1527
        const int z3= temp[4*1+i] + temp[4*3+i];
1528

1529
        block[stride*0 +offset]= (z0 + z3)>>1;
1530
        block[stride*2 +offset]= (z1 + z2)>>1;
1531
        block[stride*8 +offset]= (z1 - z2)>>1;
1532
        block[stride*10+offset]= (z0 - z3)>>1;
1533
    }
1534
}
1535
#endif
1536

    
1537
#undef xStride
1538
#undef stride
1539

    
1540
static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1541
    const int stride= 16*2;
1542
    const int xStride= 16;
1543
    int a,b,c,d,e;
1544

    
1545
    a= block[stride*0 + xStride*0];
1546
    b= block[stride*0 + xStride*1];
1547
    c= block[stride*1 + xStride*0];
1548
    d= block[stride*1 + xStride*1];
1549

    
1550
    e= a-b;
1551
    a= a+b;
1552
    b= c-d;
1553
    c= c+d;
1554

    
1555
    block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
1556
    block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
1557
    block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
1558
    block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
1559
}
1560

    
1561
#if 0
1562
static void chroma_dc_dct_c(DCTELEM *block){
1563
    const int stride= 16*2;
1564
    const int xStride= 16;
1565
    int a,b,c,d,e;
1566

1567
    a= block[stride*0 + xStride*0];
1568
    b= block[stride*0 + xStride*1];
1569
    c= block[stride*1 + xStride*0];
1570
    d= block[stride*1 + xStride*1];
1571

1572
    e= a-b;
1573
    a= a+b;
1574
    b= c-d;
1575
    c= c+d;
1576

1577
    block[stride*0 + xStride*0]= (a+c);
1578
    block[stride*0 + xStride*1]= (e+b);
1579
    block[stride*1 + xStride*0]= (a-c);
1580
    block[stride*1 + xStride*1]= (e-b);
1581
}
1582
#endif
1583

    
1584
/**
1585
 * gets the chroma qp.
1586
 */
1587
static inline int get_chroma_qp(H264Context *h, int t, int qscale){
1588
    return h->pps.chroma_qp_table[t][qscale];
1589
}
1590

    
1591
//FIXME need to check that this does not overflow signed 32 bit for low qp, I am not sure, it's very close
1592
//FIXME check that gcc inlines this (and optimizes intra & separate_dc stuff away)
1593
static inline int quantize_c(DCTELEM *block, uint8_t *scantable, int qscale, int intra, int separate_dc){
1594
    int i;
1595
    const int * const quant_table= quant_coeff[qscale];
1596
    const int bias= intra ? (1<<QUANT_SHIFT)/3 : (1<<QUANT_SHIFT)/6;
1597
    const unsigned int threshold1= (1<<QUANT_SHIFT) - bias - 1;
1598
    const unsigned int threshold2= (threshold1<<1);
1599
    int last_non_zero;
1600

    
1601
    if(separate_dc){
1602
        if(qscale<=18){
1603
            //avoid overflows
1604
            const int dc_bias= intra ? (1<<(QUANT_SHIFT-2))/3 : (1<<(QUANT_SHIFT-2))/6;
1605
            const unsigned int dc_threshold1= (1<<(QUANT_SHIFT-2)) - dc_bias - 1;
1606
            const unsigned int dc_threshold2= (dc_threshold1<<1);
1607

    
1608
            int level= block[0]*quant_coeff[qscale+18][0];
1609
            if(((unsigned)(level+dc_threshold1))>dc_threshold2){
1610
                if(level>0){
1611
                    level= (dc_bias + level)>>(QUANT_SHIFT-2);
1612
                    block[0]= level;
1613
                }else{
1614
                    level= (dc_bias - level)>>(QUANT_SHIFT-2);
1615
                    block[0]= -level;
1616
                }
1617
//                last_non_zero = i;
1618
            }else{
1619
                block[0]=0;
1620
            }
1621
        }else{
1622
            const int dc_bias= intra ? (1<<(QUANT_SHIFT+1))/3 : (1<<(QUANT_SHIFT+1))/6;
1623
            const unsigned int dc_threshold1= (1<<(QUANT_SHIFT+1)) - dc_bias - 1;
1624
            const unsigned int dc_threshold2= (dc_threshold1<<1);
1625

    
1626
            int level= block[0]*quant_table[0];
1627
            if(((unsigned)(level+dc_threshold1))>dc_threshold2){
1628
                if(level>0){
1629
                    level= (dc_bias + level)>>(QUANT_SHIFT+1);
1630
                    block[0]= level;
1631
                }else{
1632
                    level= (dc_bias - level)>>(QUANT_SHIFT+1);
1633
                    block[0]= -level;
1634
                }
1635
//                last_non_zero = i;
1636
            }else{
1637
                block[0]=0;
1638
            }
1639
        }
1640
        last_non_zero= 0;
1641
        i=1;
1642
    }else{
1643
        last_non_zero= -1;
1644
        i=0;
1645
    }
1646

    
1647
    for(; i<16; i++){
1648
        const int j= scantable[i];
1649
        int level= block[j]*quant_table[j];
1650

    
1651
//        if(   bias+level >= (1<<(QMAT_SHIFT - 3))
1652
//           || bias-level >= (1<<(QMAT_SHIFT - 3))){
1653
        if(((unsigned)(level+threshold1))>threshold2){
1654
            if(level>0){
1655
                level= (bias + level)>>QUANT_SHIFT;
1656
                block[j]= level;
1657
            }else{
1658
                level= (bias - level)>>QUANT_SHIFT;
1659
                block[j]= -level;
1660
            }
1661
            last_non_zero = i;
1662
        }else{
1663
            block[j]=0;
1664
        }
1665
    }
1666

    
1667
    return last_non_zero;
1668
}
1669

    
1670
static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
1671
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1672
                           int src_x_offset, int src_y_offset,
1673
                           qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
1674
    MpegEncContext * const s = &h->s;
1675
    const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
1676
    int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
1677
    const int luma_xy= (mx&3) + ((my&3)<<2);
1678
    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
1679
    uint8_t * src_cb, * src_cr;
1680
    int extra_width= h->emu_edge_width;
1681
    int extra_height= h->emu_edge_height;
1682
    int emu=0;
1683
    const int full_mx= mx>>2;
1684
    const int full_my= my>>2;
1685
    const int pic_width  = 16*s->mb_width;
1686
    const int pic_height = 16*s->mb_height >> MB_FIELD;
1687

    
1688
    if(!pic->data[0]) //FIXME this is unacceptable, some sensible error concealment must be done for missing reference frames
1689
        return;
1690

    
1691
    if(mx&7) extra_width -= 3;
1692
    if(my&7) extra_height -= 3;
1693

    
1694
    if(   full_mx < 0-extra_width
1695
       || full_my < 0-extra_height
1696
       || full_mx + 16/*FIXME*/ > pic_width + extra_width
1697
       || full_my + 16/*FIXME*/ > pic_height + extra_height){
1698
        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);
1699
            src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
1700
        emu=1;
1701
    }
1702

    
1703
    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
1704
    if(!square){
1705
        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
1706
    }
1707

    
1708
    if(ENABLE_GRAY && s->flags&CODEC_FLAG_GRAY) return;
1709

    
1710
    if(MB_FIELD){
1711
        // chroma offset when predicting from a field of opposite parity
1712
        my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
1713
        emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
1714
    }
1715
    src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1716
    src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1717

    
1718
    if(emu){
1719
        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);
1720
            src_cb= s->edge_emu_buffer;
1721
    }
1722
    chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1723

    
1724
    if(emu){
1725
        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);
1726
            src_cr= s->edge_emu_buffer;
1727
    }
1728
    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1729
}
1730

    
1731
static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
1732
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1733
                           int x_offset, int y_offset,
1734
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1735
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1736
                           int list0, int list1){
1737
    MpegEncContext * const s = &h->s;
1738
    qpel_mc_func *qpix_op=  qpix_put;
1739
    h264_chroma_mc_func chroma_op= chroma_put;
1740

    
1741
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1742
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1743
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1744
    x_offset += 8*s->mb_x;
1745
    y_offset += 8*(s->mb_y >> MB_FIELD);
1746

    
1747
    if(list0){
1748
        Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
1749
        mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
1750
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
1751
                           qpix_op, chroma_op);
1752

    
1753
        qpix_op=  qpix_avg;
1754
        chroma_op= chroma_avg;
1755
    }
1756

    
1757
    if(list1){
1758
        Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
1759
        mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
1760
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
1761
                           qpix_op, chroma_op);
1762
    }
1763
}
1764

    
1765
static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
1766
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1767
                           int x_offset, int y_offset,
1768
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1769
                           h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
1770
                           h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
1771
                           int list0, int list1){
1772
    MpegEncContext * const s = &h->s;
1773

    
1774
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1775
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1776
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1777
    x_offset += 8*s->mb_x;
1778
    y_offset += 8*(s->mb_y >> MB_FIELD);
1779

    
1780
    if(list0 && list1){
1781
        /* don't optimize for luma-only case, since B-frames usually
1782
         * use implicit weights => chroma too. */
1783
        uint8_t *tmp_cb = s->obmc_scratchpad;
1784
        uint8_t *tmp_cr = s->obmc_scratchpad + 8;
1785
        uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
1786
        int refn0 = h->ref_cache[0][ scan8[n] ];
1787
        int refn1 = h->ref_cache[1][ scan8[n] ];
1788

    
1789
        mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
1790
                    dest_y, dest_cb, dest_cr,
1791
                    x_offset, y_offset, qpix_put, chroma_put);
1792
        mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
1793
                    tmp_y, tmp_cb, tmp_cr,
1794
                    x_offset, y_offset, qpix_put, chroma_put);
1795

    
1796
        if(h->use_weight == 2){
1797
            int weight0 = h->implicit_weight[refn0][refn1];
1798
            int weight1 = 64 - weight0;
1799
            luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
1800
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
1801
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
1802
        }else{
1803
            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
1804
                            h->luma_weight[0][refn0], h->luma_weight[1][refn1],
1805
                            h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
1806
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1807
                            h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
1808
                            h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
1809
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1810
                            h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
1811
                            h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
1812
        }
1813
    }else{
1814
        int list = list1 ? 1 : 0;
1815
        int refn = h->ref_cache[list][ scan8[n] ];
1816
        Picture *ref= &h->ref_list[list][refn];
1817
        mc_dir_part(h, ref, n, square, chroma_height, delta, list,
1818
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
1819
                    qpix_put, chroma_put);
1820

    
1821
        luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
1822
                       h->luma_weight[list][refn], h->luma_offset[list][refn]);
1823
        if(h->use_weight_chroma){
1824
            chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1825
                             h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
1826
            chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1827
                             h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
1828
        }
1829
    }
1830
}
1831

    
1832
static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
1833
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1834
                           int x_offset, int y_offset,
1835
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1836
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1837
                           h264_weight_func *weight_op, h264_biweight_func *weight_avg,
1838
                           int list0, int list1){
1839
    if((h->use_weight==2 && list0 && list1
1840
        && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
1841
       || h->use_weight==1)
1842
        mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1843
                         x_offset, y_offset, qpix_put, chroma_put,
1844
                         weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
1845
    else
1846
        mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1847
                    x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
1848
}
1849

    
1850
static inline void prefetch_motion(H264Context *h, int list){
1851
    /* fetch pixels for estimated mv 4 macroblocks ahead
1852
     * optimized for 64byte cache lines */
1853
    MpegEncContext * const s = &h->s;
1854
    const int refn = h->ref_cache[list][scan8[0]];
1855
    if(refn >= 0){
1856
        const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
1857
        const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
1858
        uint8_t **src= h->ref_list[list][refn].data;
1859
        int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
1860
        s->dsp.prefetch(src[0]+off, s->linesize, 4);
1861
        off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
1862
        s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
1863
    }
1864
}
1865

    
1866
static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1867
                      qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
1868
                      qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
1869
                      h264_weight_func *weight_op, h264_biweight_func *weight_avg){
1870
    MpegEncContext * const s = &h->s;
1871
    const int mb_xy= h->mb_xy;
1872
    const int mb_type= s->current_picture.mb_type[mb_xy];
1873

    
1874
    assert(IS_INTER(mb_type));
1875

    
1876
    prefetch_motion(h, 0);
1877

    
1878
    if(IS_16X16(mb_type)){
1879
        mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
1880
                qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
1881
                &weight_op[0], &weight_avg[0],
1882
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1883
    }else if(IS_16X8(mb_type)){
1884
        mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
1885
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1886
                &weight_op[1], &weight_avg[1],
1887
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1888
        mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
1889
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1890
                &weight_op[1], &weight_avg[1],
1891
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1892
    }else if(IS_8X16(mb_type)){
1893
        mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
1894
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1895
                &weight_op[2], &weight_avg[2],
1896
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1897
        mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
1898
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1899
                &weight_op[2], &weight_avg[2],
1900
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1901
    }else{
1902
        int i;
1903

    
1904
        assert(IS_8X8(mb_type));
1905

    
1906
        for(i=0; i<4; i++){
1907
            const int sub_mb_type= h->sub_mb_type[i];
1908
            const int n= 4*i;
1909
            int x_offset= (i&1)<<2;
1910
            int y_offset= (i&2)<<1;
1911

    
1912
            if(IS_SUB_8X8(sub_mb_type)){
1913
                mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1914
                    qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1915
                    &weight_op[3], &weight_avg[3],
1916
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1917
            }else if(IS_SUB_8X4(sub_mb_type)){
1918
                mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1919
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1920
                    &weight_op[4], &weight_avg[4],
1921
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1922
                mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
1923
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1924
                    &weight_op[4], &weight_avg[4],
1925
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1926
            }else if(IS_SUB_4X8(sub_mb_type)){
1927
                mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1928
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1929
                    &weight_op[5], &weight_avg[5],
1930
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1931
                mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
1932
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1933
                    &weight_op[5], &weight_avg[5],
1934
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1935
            }else{
1936
                int j;
1937
                assert(IS_SUB_4X4(sub_mb_type));
1938
                for(j=0; j<4; j++){
1939
                    int sub_x_offset= x_offset + 2*(j&1);
1940
                    int sub_y_offset= y_offset +   (j&2);
1941
                    mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
1942
                        qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1943
                        &weight_op[6], &weight_avg[6],
1944
                        IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1945
                }
1946
            }
1947
        }
1948
    }
1949

    
1950
    prefetch_motion(h, 1);
1951
}
1952

    
1953
static av_cold void decode_init_vlc(void){
1954
    static int done = 0;
1955

    
1956
    if (!done) {
1957
        int i;
1958
        done = 1;
1959

    
1960
        init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
1961
                 &chroma_dc_coeff_token_len [0], 1, 1,
1962
                 &chroma_dc_coeff_token_bits[0], 1, 1, 1);
1963

    
1964
        for(i=0; i<4; i++){
1965
            init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
1966
                     &coeff_token_len [i][0], 1, 1,
1967
                     &coeff_token_bits[i][0], 1, 1, 1);
1968
        }
1969

    
1970
        for(i=0; i<3; i++){
1971
            init_vlc(&chroma_dc_total_zeros_vlc[i], CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
1972
                     &chroma_dc_total_zeros_len [i][0], 1, 1,
1973
                     &chroma_dc_total_zeros_bits[i][0], 1, 1, 1);
1974
        }
1975
        for(i=0; i<15; i++){
1976
            init_vlc(&total_zeros_vlc[i], TOTAL_ZEROS_VLC_BITS, 16,
1977
                     &total_zeros_len [i][0], 1, 1,
1978
                     &total_zeros_bits[i][0], 1, 1, 1);
1979
        }
1980

    
1981
        for(i=0; i<6; i++){
1982
            init_vlc(&run_vlc[i], RUN_VLC_BITS, 7,
1983
                     &run_len [i][0], 1, 1,
1984
                     &run_bits[i][0], 1, 1, 1);
1985
        }
1986
        init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
1987
                 &run_len [6][0], 1, 1,
1988
                 &run_bits[6][0], 1, 1, 1);
1989
    }
1990
}
1991

    
1992
static void free_tables(H264Context *h){
1993
    int i;
1994
    H264Context *hx;
1995
    av_freep(&h->intra4x4_pred_mode);
1996
    av_freep(&h->chroma_pred_mode_table);
1997
    av_freep(&h->cbp_table);
1998
    av_freep(&h->mvd_table[0]);
1999
    av_freep(&h->mvd_table[1]);
2000
    av_freep(&h->direct_table);
2001
    av_freep(&h->non_zero_count);
2002
    av_freep(&h->slice_table_base);
2003
    h->slice_table= NULL;
2004

    
2005
    av_freep(&h->mb2b_xy);
2006
    av_freep(&h->mb2b8_xy);
2007

    
2008
    for(i = 0; i < MAX_SPS_COUNT; i++)
2009
        av_freep(h->sps_buffers + i);
2010

    
2011
    for(i = 0; i < MAX_PPS_COUNT; i++)
2012
        av_freep(h->pps_buffers + i);
2013

    
2014
    for(i = 0; i < h->s.avctx->thread_count; i++) {
2015
        hx = h->thread_context[i];
2016
        if(!hx) continue;
2017
        av_freep(&hx->top_borders[1]);
2018
        av_freep(&hx->top_borders[0]);
2019
        av_freep(&hx->s.obmc_scratchpad);
2020
    }
2021
}
2022

    
2023
static void init_dequant8_coeff_table(H264Context *h){
2024
    int i,q,x;
2025
    const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
2026
    h->dequant8_coeff[0] = h->dequant8_buffer[0];
2027
    h->dequant8_coeff[1] = h->dequant8_buffer[1];
2028

    
2029
    for(i=0; i<2; i++ ){
2030
        if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
2031
            h->dequant8_coeff[1] = h->dequant8_buffer[0];
2032
            break;
2033
        }
2034

    
2035
        for(q=0; q<52; q++){
2036
            int shift = ff_div6[q];
2037
            int idx = ff_rem6[q];
2038
            for(x=0; x<64; x++)
2039
                h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
2040
                    ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
2041
                    h->pps.scaling_matrix8[i][x]) << shift;
2042
        }
2043
    }
2044
}
2045

    
2046
static void init_dequant4_coeff_table(H264Context *h){
2047
    int i,j,q,x;
2048
    const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
2049
    for(i=0; i<6; i++ ){
2050
        h->dequant4_coeff[i] = h->dequant4_buffer[i];
2051
        for(j=0; j<i; j++){
2052
            if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
2053
                h->dequant4_coeff[i] = h->dequant4_buffer[j];
2054
                break;
2055
            }
2056
        }
2057
        if(j<i)
2058
            continue;
2059

    
2060
        for(q=0; q<52; q++){
2061
            int shift = ff_div6[q] + 2;
2062
            int idx = ff_rem6[q];
2063
            for(x=0; x<16; x++)
2064
                h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
2065
                    ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
2066
                    h->pps.scaling_matrix4[i][x]) << shift;
2067
        }
2068
    }
2069
}
2070

    
2071
static void init_dequant_tables(H264Context *h){
2072
    int i,x;
2073
    init_dequant4_coeff_table(h);
2074
    if(h->pps.transform_8x8_mode)
2075
        init_dequant8_coeff_table(h);
2076
    if(h->sps.transform_bypass){
2077
        for(i=0; i<6; i++)
2078
            for(x=0; x<16; x++)
2079
                h->dequant4_coeff[i][0][x] = 1<<6;
2080
        if(h->pps.transform_8x8_mode)
2081
            for(i=0; i<2; i++)
2082
                for(x=0; x<64; x++)
2083
                    h->dequant8_coeff[i][0][x] = 1<<6;
2084
    }
2085
}
2086

    
2087

    
2088
/**
2089
 * allocates tables.
2090
 * needs width/height
2091
 */
2092
static int alloc_tables(H264Context *h){
2093
    MpegEncContext * const s = &h->s;
2094
    const int big_mb_num= s->mb_stride * (s->mb_height+1);
2095
    int x,y;
2096

    
2097
    CHECKED_ALLOCZ(h->intra4x4_pred_mode, big_mb_num * 8  * sizeof(uint8_t))
2098

    
2099
    CHECKED_ALLOCZ(h->non_zero_count    , big_mb_num * 16 * sizeof(uint8_t))
2100
    CHECKED_ALLOCZ(h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(uint8_t))
2101
    CHECKED_ALLOCZ(h->cbp_table, big_mb_num * sizeof(uint16_t))
2102

    
2103
    CHECKED_ALLOCZ(h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t))
2104
    CHECKED_ALLOCZ(h->mvd_table[0], 32*big_mb_num * sizeof(uint16_t));
2105
    CHECKED_ALLOCZ(h->mvd_table[1], 32*big_mb_num * sizeof(uint16_t));
2106
    CHECKED_ALLOCZ(h->direct_table, 32*big_mb_num * sizeof(uint8_t));
2107

    
2108
    memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(uint8_t));
2109
    h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
2110

    
2111
    CHECKED_ALLOCZ(h->mb2b_xy  , big_mb_num * sizeof(uint32_t));
2112
    CHECKED_ALLOCZ(h->mb2b8_xy , big_mb_num * sizeof(uint32_t));
2113
    for(y=0; y<s->mb_height; y++){
2114
        for(x=0; x<s->mb_width; x++){
2115
            const int mb_xy= x + y*s->mb_stride;
2116
            const int b_xy = 4*x + 4*y*h->b_stride;
2117
            const int b8_xy= 2*x + 2*y*h->b8_stride;
2118

    
2119
            h->mb2b_xy [mb_xy]= b_xy;
2120
            h->mb2b8_xy[mb_xy]= b8_xy;
2121
        }
2122
    }
2123

    
2124
    s->obmc_scratchpad = NULL;
2125

    
2126
    if(!h->dequant4_coeff[0])
2127
        init_dequant_tables(h);
2128

    
2129
    return 0;
2130
fail:
2131
    free_tables(h);
2132
    return -1;
2133
}
2134

    
2135
/**
2136
 * Mimic alloc_tables(), but for every context thread.
2137
 */
2138
static void clone_tables(H264Context *dst, H264Context *src){
2139
    dst->intra4x4_pred_mode       = src->intra4x4_pred_mode;
2140
    dst->non_zero_count           = src->non_zero_count;
2141
    dst->slice_table              = src->slice_table;
2142
    dst->cbp_table                = src->cbp_table;
2143
    dst->mb2b_xy                  = src->mb2b_xy;
2144
    dst->mb2b8_xy                 = src->mb2b8_xy;
2145
    dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
2146
    dst->mvd_table[0]             = src->mvd_table[0];
2147
    dst->mvd_table[1]             = src->mvd_table[1];
2148
    dst->direct_table             = src->direct_table;
2149

    
2150
    dst->s.obmc_scratchpad = NULL;
2151
    ff_h264_pred_init(&dst->hpc, src->s.codec_id);
2152
}
2153

    
2154
/**
2155
 * Init context
2156
 * Allocate buffers which are not shared amongst multiple threads.
2157
 */
2158
static int context_init(H264Context *h){
2159
    CHECKED_ALLOCZ(h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2160
    CHECKED_ALLOCZ(h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2161

    
2162
    return 0;
2163
fail:
2164
    return -1; // free_tables will clean up for us
2165
}
2166

    
2167
static av_cold void common_init(H264Context *h){
2168
    MpegEncContext * const s = &h->s;
2169

    
2170
    s->width = s->avctx->width;
2171
    s->height = s->avctx->height;
2172
    s->codec_id= s->avctx->codec->id;
2173

    
2174
    ff_h264_pred_init(&h->hpc, s->codec_id);
2175

    
2176
    h->dequant_coeff_pps= -1;
2177
    s->unrestricted_mv=1;
2178
    s->decode=1; //FIXME
2179

    
2180
    memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
2181
    memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
2182
}
2183

    
2184
static av_cold int decode_init(AVCodecContext *avctx){
2185
    H264Context *h= avctx->priv_data;
2186
    MpegEncContext * const s = &h->s;
2187

    
2188
    MPV_decode_defaults(s);
2189

    
2190
    s->avctx = avctx;
2191
    common_init(h);
2192

    
2193
    s->out_format = FMT_H264;
2194
    s->workaround_bugs= avctx->workaround_bugs;
2195

    
2196
    // set defaults
2197
//    s->decode_mb= ff_h263_decode_mb;
2198
    s->quarter_sample = 1;
2199
    s->low_delay= 1;
2200

    
2201
    if(avctx->codec_id == CODEC_ID_SVQ3)
2202
        avctx->pix_fmt= PIX_FMT_YUVJ420P;
2203
    else
2204
        avctx->pix_fmt= PIX_FMT_YUV420P;
2205

    
2206
    decode_init_vlc();
2207

    
2208
    if(avctx->extradata_size > 0 && avctx->extradata &&
2209
       *(char *)avctx->extradata == 1){
2210
        h->is_avc = 1;
2211
        h->got_avcC = 0;
2212
    } else {
2213
        h->is_avc = 0;
2214
    }
2215

    
2216
    h->thread_context[0] = h;
2217
    return 0;
2218
}
2219

    
2220
static int frame_start(H264Context *h){
2221
    MpegEncContext * const s = &h->s;
2222
    int i;
2223

    
2224
    if(MPV_frame_start(s, s->avctx) < 0)
2225
        return -1;
2226
    ff_er_frame_start(s);
2227
    /*
2228
     * MPV_frame_start uses pict_type to derive key_frame.
2229
     * This is incorrect for H.264; IDR markings must be used.
2230
     * Zero here; IDR markings per slice in frame or fields are ORed in later.
2231
     * See decode_nal_units().
2232
     */
2233
    s->current_picture_ptr->key_frame= 0;
2234

    
2235
    assert(s->linesize && s->uvlinesize);
2236

    
2237
    for(i=0; i<16; i++){
2238
        h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
2239
        h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
2240
    }
2241
    for(i=0; i<4; i++){
2242
        h->block_offset[16+i]=
2243
        h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2244
        h->block_offset[24+16+i]=
2245
        h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2246
    }
2247

    
2248
    /* can't be in alloc_tables because linesize isn't known there.
2249
     * FIXME: redo bipred weight to not require extra buffer? */
2250
    for(i = 0; i < s->avctx->thread_count; i++)
2251
        if(!h->thread_context[i]->s.obmc_scratchpad)
2252
            h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
2253

    
2254
    /* some macroblocks will be accessed before they're available */
2255
    if(FRAME_MBAFF || s->avctx->thread_count > 1)
2256
        memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(uint8_t));
2257

    
2258
//    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
2259

    
2260
    // We mark the current picture as non-reference after allocating it, so
2261
    // that if we break out due to an error it can be released automatically
2262
    // in the next MPV_frame_start().
2263
    // SVQ3 as well as most other codecs have only last/next/current and thus
2264
    // get released even with set reference, besides SVQ3 and others do not
2265
    // mark frames as reference later "naturally".
2266
    if(s->codec_id != CODEC_ID_SVQ3)
2267
        s->current_picture_ptr->reference= 0;
2268

    
2269
    s->current_picture_ptr->field_poc[0]=
2270
    s->current_picture_ptr->field_poc[1]= INT_MAX;
2271
    assert(s->current_picture_ptr->long_ref==0);
2272

    
2273
    return 0;
2274
}
2275

    
2276
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){
2277
    MpegEncContext * const s = &h->s;
2278
    int i;
2279

    
2280
    src_y  -=   linesize;
2281
    src_cb -= uvlinesize;
2282
    src_cr -= uvlinesize;
2283

    
2284
    // There are two lines saved, the line above the the top macroblock of a pair,
2285
    // and the line above the bottom macroblock
2286
    h->left_border[0]= h->top_borders[0][s->mb_x][15];
2287
    for(i=1; i<17; i++){
2288
        h->left_border[i]= src_y[15+i*  linesize];
2289
    }
2290

    
2291
    *(uint64_t*)(h->top_borders[0][s->mb_x]+0)= *(uint64_t*)(src_y +  16*linesize);
2292
    *(uint64_t*)(h->top_borders[0][s->mb_x]+8)= *(uint64_t*)(src_y +8+16*linesize);
2293

    
2294
    if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2295
        h->left_border[17  ]= h->top_borders[0][s->mb_x][16+7];
2296
        h->left_border[17+9]= h->top_borders[0][s->mb_x][24+7];
2297
        for(i=1; i<9; i++){
2298
            h->left_border[i+17  ]= src_cb[7+i*uvlinesize];
2299
            h->left_border[i+17+9]= src_cr[7+i*uvlinesize];
2300
        }
2301
        *(uint64_t*)(h->top_borders[0][s->mb_x]+16)= *(uint64_t*)(src_cb+8*uvlinesize);
2302
        *(uint64_t*)(h->top_borders[0][s->mb_x]+24)= *(uint64_t*)(src_cr+8*uvlinesize);
2303
    }
2304
}
2305

    
2306
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){
2307
    MpegEncContext * const s = &h->s;
2308
    int temp8, i;
2309
    uint64_t temp64;
2310
    int deblock_left;
2311
    int deblock_top;
2312
    int mb_xy;
2313

    
2314
    if(h->deblocking_filter == 2) {
2315
        mb_xy = h->mb_xy;
2316
        deblock_left = h->slice_table[mb_xy] == h->slice_table[mb_xy - 1];
2317
        deblock_top  = h->slice_table[mb_xy] == h->slice_table[h->top_mb_xy];
2318
    } else {
2319
        deblock_left = (s->mb_x > 0);
2320
        deblock_top =  (s->mb_y > 0);
2321
    }
2322

    
2323
    src_y  -=   linesize + 1;
2324
    src_cb -= uvlinesize + 1;
2325
    src_cr -= uvlinesize + 1;
2326

    
2327
#define XCHG(a,b,t,xchg)\
2328
t= a;\
2329
if(xchg)\
2330
    a= b;\
2331
b= t;
2332

    
2333
    if(deblock_left){
2334
        for(i = !deblock_top; i<17; i++){
2335
            XCHG(h->left_border[i     ], src_y [i*  linesize], temp8, xchg);
2336
        }
2337
    }
2338

    
2339
    if(deblock_top){
2340
        XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+0), *(uint64_t*)(src_y +1), temp64, xchg);
2341
        XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+8), *(uint64_t*)(src_y +9), temp64, 1);
2342
        if(s->mb_x+1 < s->mb_width){
2343
            XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x+1]), *(uint64_t*)(src_y +17), temp64, 1);
2344
        }
2345
    }
2346

    
2347
    if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2348
        if(deblock_left){
2349
            for(i = !deblock_top; i<9; i++){
2350
                XCHG(h->left_border[i+17  ], src_cb[i*uvlinesize], temp8, xchg);
2351
                XCHG(h->left_border[i+17+9], src_cr[i*uvlinesize], temp8, xchg);
2352
            }
2353
        }
2354
        if(deblock_top){
2355
            XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+16), *(uint64_t*)(src_cb+1), temp64, 1);
2356
            XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+24), *(uint64_t*)(src_cr+1), temp64, 1);
2357
        }
2358
    }
2359
}
2360

    
2361
static inline void backup_pair_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize){
2362
    MpegEncContext * const s = &h->s;
2363
    int i;
2364

    
2365
    src_y  -= 2 *   linesize;
2366
    src_cb -= 2 * uvlinesize;
2367
    src_cr -= 2 * uvlinesize;
2368

    
2369
    // There are two lines saved, the line above the the top macroblock of a pair,
2370
    // and the line above the bottom macroblock
2371
    h->left_border[0]= h->top_borders[0][s->mb_x][15];
2372
    h->left_border[1]= h->top_borders[1][s->mb_x][15];
2373
    for(i=2; i<34; i++){
2374
        h->left_border[i]= src_y[15+i*  linesize];
2375
    }
2376

    
2377
    *(uint64_t*)(h->top_borders[0][s->mb_x]+0)= *(uint64_t*)(src_y +  32*linesize);
2378
    *(uint64_t*)(h->top_borders[0][s->mb_x]+8)= *(uint64_t*)(src_y +8+32*linesize);
2379
    *(uint64_t*)(h->top_borders[1][s->mb_x]+0)= *(uint64_t*)(src_y +  33*linesize);
2380
    *(uint64_t*)(h->top_borders[1][s->mb_x]+8)= *(uint64_t*)(src_y +8+33*linesize);
2381

    
2382
    if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2383
        h->left_border[34     ]= h->top_borders[0][s->mb_x][16+7];
2384
        h->left_border[34+   1]= h->top_borders[1][s->mb_x][16+7];
2385
        h->left_border[34+18  ]= h->top_borders[0][s->mb_x][24+7];
2386
        h->left_border[34+18+1]= h->top_borders[1][s->mb_x][24+7];
2387
        for(i=2; i<18; i++){
2388
            h->left_border[i+34   ]= src_cb[7+i*uvlinesize];
2389
            h->left_border[i+34+18]= src_cr[7+i*uvlinesize];
2390
        }
2391
        *(uint64_t*)(h->top_borders[0][s->mb_x]+16)= *(uint64_t*)(src_cb+16*uvlinesize);
2392
        *(uint64_t*)(h->top_borders[0][s->mb_x]+24)= *(uint64_t*)(src_cr+16*uvlinesize);
2393
        *(uint64_t*)(h->top_borders[1][s->mb_x]+16)= *(uint64_t*)(src_cb+17*uvlinesize);
2394
        *(uint64_t*)(h->top_borders[1][s->mb_x]+24)= *(uint64_t*)(src_cr+17*uvlinesize);
2395
    }
2396
}
2397

    
2398
static inline void xchg_pair_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int xchg){
2399
    MpegEncContext * const s = &h->s;
2400
    int temp8, i;
2401
    uint64_t temp64;
2402
    int deblock_left = (s->mb_x > 0);
2403
    int deblock_top  = (s->mb_y > 1);
2404

    
2405
    tprintf(s->avctx, "xchg_pair_border: src_y:%p src_cb:%p src_cr:%p ls:%d uvls:%d\n", src_y, src_cb, src_cr, linesize, uvlinesize);
2406

    
2407
    src_y  -= 2 *   linesize + 1;
2408
    src_cb -= 2 * uvlinesize + 1;
2409
    src_cr -= 2 * uvlinesize + 1;
2410

    
2411
#define XCHG(a,b,t,xchg)\
2412
t= a;\
2413
if(xchg)\
2414
    a= b;\
2415
b= t;
2416

    
2417
    if(deblock_left){
2418
        for(i = (!deblock_top)<<1; i<34; i++){
2419
            XCHG(h->left_border[i     ], src_y [i*  linesize], temp8, xchg);
2420
        }
2421
    }
2422

    
2423
    if(deblock_top){
2424
        XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+0), *(uint64_t*)(src_y +1), temp64, xchg);
2425
        XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+8), *(uint64_t*)(src_y +9), temp64, 1);
2426
        XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x]+0), *(uint64_t*)(src_y +1 +linesize), temp64, xchg);
2427
        XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x]+8), *(uint64_t*)(src_y +9 +linesize), temp64, 1);
2428
        if(s->mb_x+1 < s->mb_width){
2429
            XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x+1]), *(uint64_t*)(src_y +17), temp64, 1);
2430
            XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x+1]), *(uint64_t*)(src_y +17 +linesize), temp64, 1);
2431
        }
2432
    }
2433

    
2434
    if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2435
        if(deblock_left){
2436
            for(i = (!deblock_top) << 1; i<18; i++){
2437
                XCHG(h->left_border[i+34   ], src_cb[i*uvlinesize], temp8, xchg);
2438
                XCHG(h->left_border[i+34+18], src_cr[i*uvlinesize], temp8, xchg);
2439
            }
2440
        }
2441
        if(deblock_top){
2442
            XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+16), *(uint64_t*)(src_cb+1), temp64, 1);
2443
            XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+24), *(uint64_t*)(src_cr+1), temp64, 1);
2444
            XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x]+16), *(uint64_t*)(src_cb+1 +uvlinesize), temp64, 1);
2445
            XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x]+24), *(uint64_t*)(src_cr+1 +uvlinesize), temp64, 1);
2446
        }
2447
    }
2448
}
2449

    
2450
static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
2451
    MpegEncContext * const s = &h->s;
2452
    const int mb_x= s->mb_x;
2453
    const int mb_y= s->mb_y;
2454
    const int mb_xy= h->mb_xy;
2455
    const int mb_type= s->current_picture.mb_type[mb_xy];
2456
    uint8_t  *dest_y, *dest_cb, *dest_cr;
2457
    int linesize, uvlinesize /*dct_offset*/;
2458
    int i;
2459
    int *block_offset = &h->block_offset[0];
2460
    const unsigned int bottom = mb_y & 1;
2461
    const int transform_bypass = (s->qscale == 0 && h->sps.transform_bypass), is_h264 = (simple || s->codec_id == CODEC_ID_H264);
2462
    void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
2463
    void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
2464

    
2465
    dest_y  = s->current_picture.data[0] + (mb_y * 16* s->linesize  ) + mb_x * 16;
2466
    dest_cb = s->current_picture.data[1] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
2467
    dest_cr = s->current_picture.data[2] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
2468

    
2469
    s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
2470
    s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
2471

    
2472
    if (!simple && MB_FIELD) {
2473
        linesize   = h->mb_linesize   = s->linesize * 2;
2474
        uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2475
        block_offset = &h->block_offset[24];
2476
        if(mb_y&1){ //FIXME move out of this function?
2477
            dest_y -= s->linesize*15;
2478
            dest_cb-= s->uvlinesize*7;
2479
            dest_cr-= s->uvlinesize*7;
2480
        }
2481
        if(FRAME_MBAFF) {
2482
            int list;
2483
            for(list=0; list<h->list_count; list++){
2484
                if(!USES_LIST(mb_type, list))
2485
                    continue;
2486
                if(IS_16X16(mb_type)){
2487
                    int8_t *ref = &h->ref_cache[list][scan8[0]];
2488
                    fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
2489
                }else{
2490
                    for(i=0; i<16; i+=4){
2491
                        //FIXME can refs be smaller than 8x8 when !direct_8x8_inference ?
2492
                        int ref = h->ref_cache[list][scan8[i]];
2493
                        if(ref >= 0)
2494
                            fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
2495
                    }
2496
                }
2497
            }
2498
        }
2499
    } else {
2500
        linesize   = h->mb_linesize   = s->linesize;
2501
        uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2502
//        dct_offset = s->linesize * 16;
2503
    }
2504

    
2505
    if(transform_bypass){
2506
        idct_dc_add =
2507
        idct_add = IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
2508
    }else if(IS_8x8DCT(mb_type)){
2509
        idct_dc_add = s->dsp.h264_idct8_dc_add;
2510
        idct_add = s->dsp.h264_idct8_add;
2511
    }else{
2512
        idct_dc_add = s->dsp.h264_idct_dc_add;
2513
        idct_add = s->dsp.h264_idct_add;
2514
    }
2515

    
2516
    if(!simple && FRAME_MBAFF && h->deblocking_filter && IS_INTRA(mb_type)
2517
       && (!bottom || !IS_INTRA(s->current_picture.mb_type[mb_xy-s->mb_stride]))){
2518
        int mbt_y = mb_y&~1;
2519
        uint8_t *top_y  = s->current_picture.data[0] + (mbt_y * 16* s->linesize  ) + mb_x * 16;
2520
        uint8_t *top_cb = s->current_picture.data[1] + (mbt_y * 8 * s->uvlinesize) + mb_x * 8;
2521
        uint8_t *top_cr = s->current_picture.data[2] + (mbt_y * 8 * s->uvlinesize) + mb_x * 8;
2522
        xchg_pair_border(h, top_y, top_cb, top_cr, s->linesize, s->uvlinesize, 1);
2523
    }
2524

    
2525
    if (!simple && IS_INTRA_PCM(mb_type)) {
2526
        unsigned int x, y;
2527

    
2528
        // The pixels are stored in h->mb array in the same order as levels,
2529
        // copy them in output in the correct order.
2530
        for(i=0; i<16; i++) {
2531
            for (y=0; y<4; y++) {
2532
                for (x=0; x<4; x++) {
2533
                    *(dest_y + block_offset[i] + y*linesize + x) = h->mb[i*16+y*4+x];
2534
                }
2535
            }
2536
        }
2537
        for(i=16; i<16+4; i++) {
2538
            for (y=0; y<4; y++) {
2539
                for (x=0; x<4; x++) {
2540
                    *(dest_cb + block_offset[i] + y*uvlinesize + x) = h->mb[i*16+y*4+x];
2541
                }
2542
            }
2543
        }
2544
        for(i=20; i<20+4; i++) {
2545
            for (y=0; y<4; y++) {
2546
                for (x=0; x<4; x++) {
2547
                    *(dest_cr + block_offset[i] + y*uvlinesize + x) = h->mb[i*16+y*4+x];
2548
                }
2549
            }
2550
        }
2551
    } else {
2552
        if(IS_INTRA(mb_type)){
2553
            if(h->deblocking_filter && (simple || !FRAME_MBAFF))
2554
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
2555

    
2556
            if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2557
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
2558
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
2559
            }
2560

    
2561
            if(IS_INTRA4x4(mb_type)){
2562
                if(simple || !s->encoding){
2563
                    if(IS_8x8DCT(mb_type)){
2564
                        for(i=0; i<16; i+=4){
2565
                            uint8_t * const ptr= dest_y + block_offset[i];
2566
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2567
                            const int nnz = h->non_zero_count_cache[ scan8[i] ];
2568
                            h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
2569
                                                   (h->topright_samples_available<<i)&0x4000, linesize);
2570
                            if(nnz){
2571
                                if(nnz == 1 && h->mb[i*16])
2572
                                    idct_dc_add(ptr, h->mb + i*16, linesize);
2573
                                else
2574
                                    idct_add(ptr, h->mb + i*16, linesize);
2575
                            }
2576
                        }
2577
                    }else
2578
                    for(i=0; i<16; i++){
2579
                        uint8_t * const ptr= dest_y + block_offset[i];
2580
                        uint8_t *topright;
2581
                        const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2582
                        int nnz, tr;
2583

    
2584
                        if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
2585
                            const int topright_avail= (h->topright_samples_available<<i)&0x8000;
2586
                            assert(mb_y || linesize <= block_offset[i]);
2587
                            if(!topright_avail){
2588
                                tr= ptr[3 - linesize]*0x01010101;
2589
                                topright= (uint8_t*) &tr;
2590
                            }else
2591
                                topright= ptr + 4 - linesize;
2592
                        }else
2593
                            topright= NULL;
2594

    
2595
                        h->hpc.pred4x4[ dir ](ptr, topright, linesize);
2596
                        nnz = h->non_zero_count_cache[ scan8[i] ];
2597
                        if(nnz){
2598
                            if(is_h264){
2599
                                if(nnz == 1 && h->mb[i*16])
2600
                                    idct_dc_add(ptr, h->mb + i*16, linesize);
2601
                                else
2602
                                    idct_add(ptr, h->mb + i*16, linesize);
2603
                            }else
2604
                                svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
2605
                        }
2606
                    }
2607
                }
2608
            }else{
2609
                h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
2610
                if(is_h264){
2611
                    if(!transform_bypass)
2612
                        h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
2613
                }else
2614
                    svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
2615
            }
2616
            if(h->deblocking_filter && (simple || !FRAME_MBAFF))
2617
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
2618
        }else if(is_h264){
2619
            hl_motion(h, dest_y, dest_cb, dest_cr,
2620
                      s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2621
                      s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2622
                      s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
2623
        }
2624

    
2625

    
2626
        if(!IS_INTRA4x4(mb_type)){
2627
            if(is_h264){
2628
                if(IS_INTRA16x16(mb_type)){
2629
                    for(i=0; i<16; i++){
2630
                        if(h->non_zero_count_cache[ scan8[i] ])
2631
                            idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2632
                        else if(h->mb[i*16])
2633
                            idct_dc_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2634
                    }
2635
                }else{
2636
                    const int di = IS_8x8DCT(mb_type) ? 4 : 1;
2637
                    for(i=0; i<16; i+=di){
2638
                        int nnz = h->non_zero_count_cache[ scan8[i] ];
2639
                        if(nnz){
2640
                            if(nnz==1 && h->mb[i*16])
2641
                                idct_dc_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2642
                            else
2643
                                idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2644
                        }
2645
                    }
2646
                }
2647
            }else{
2648
                for(i=0; i<16; i++){
2649
                    if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
2650
                        uint8_t * const ptr= dest_y + block_offset[i];
2651
                        svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
2652
                    }
2653
                }
2654
            }
2655
        }
2656

    
2657
        if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2658
            uint8_t *dest[2] = {dest_cb, dest_cr};
2659
            if(transform_bypass){
2660
                idct_add = idct_dc_add = s->dsp.add_pixels4;
2661
            }else{
2662
                idct_add = s->dsp.h264_idct_add;
2663
                idct_dc_add = s->dsp.h264_idct_dc_add;
2664
                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]);
2665
                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]);
2666
            }
2667
            if(is_h264){
2668
                for(i=16; i<16+8; i++){
2669
                    if(h->non_zero_count_cache[ scan8[i] ])
2670
                        idct_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2671
                    else if(h->mb[i*16])
2672
                        idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2673
                }
2674
            }else{
2675
                for(i=16; i<16+8; i++){
2676
                    if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
2677
                        uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
2678
                        svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, chroma_qp[s->qscale + 12] - 12, 2);
2679
                    }
2680
                }
2681
            }
2682
        }
2683
    }
2684
    if(h->deblocking_filter) {
2685
        if (!simple && FRAME_MBAFF) {
2686
            //FIXME try deblocking one mb at a time?
2687
            // the reduction in load/storing mvs and such might outweigh the extra backup/xchg_border
2688
            const int mb_y = s->mb_y - 1;
2689
            uint8_t  *pair_dest_y, *pair_dest_cb, *pair_dest_cr;
2690
            const int mb_xy= mb_x + mb_y*s->mb_stride;
2691
            const int mb_type_top   = s->current_picture.mb_type[mb_xy];
2692
            const int mb_type_bottom= s->current_picture.mb_type[mb_xy+s->mb_stride];
2693
            if (!bottom) return;
2694
            pair_dest_y  = s->current_picture.data[0] + (mb_y * 16* s->linesize  ) + mb_x * 16;
2695
            pair_dest_cb = s->current_picture.data[1] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
2696
            pair_dest_cr = s->current_picture.data[2] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
2697

    
2698
            if(IS_INTRA(mb_type_top | mb_type_bottom))
2699
                xchg_pair_border(h, pair_dest_y, pair_dest_cb, pair_dest_cr, s->linesize, s->uvlinesize, 0);
2700

    
2701
            backup_pair_border(h, pair_dest_y, pair_dest_cb, pair_dest_cr, s->linesize, s->uvlinesize);
2702
            // deblock a pair
2703
            // top
2704
            s->mb_y--; h->mb_xy -= s->mb_stride;
2705
            tprintf(h->s.avctx, "call mbaff filter_mb mb_x:%d mb_y:%d pair_dest_y = %p, dest_y = %p\n", mb_x, mb_y, pair_dest_y, dest_y);
2706
            fill_caches(h, mb_type_top, 1); //FIXME don't fill stuff which isn't used by filter_mb
2707
            h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2708
            h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2709
            filter_mb(h, mb_x, mb_y, pair_dest_y, pair_dest_cb, pair_dest_cr, linesize, uvlinesize);
2710
            // bottom
2711
            s->mb_y++; h->mb_xy += s->mb_stride;
2712
            tprintf(h->s.avctx, "call mbaff filter_mb\n");
2713
            fill_caches(h, mb_type_bottom, 1); //FIXME don't fill stuff which isn't used by filter_mb
2714
            h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy+s->mb_stride]);
2715
            h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy+s->mb_stride]);
2716
            filter_mb(h, mb_x, mb_y+1, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2717
        } else {
2718
            tprintf(h->s.avctx, "call filter_mb\n");
2719
            backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, simple);
2720
            fill_caches(h, mb_type, 1); //FIXME don't fill stuff which isn't used by filter_mb
2721
            h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2722
            h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2723
            filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2724
        }
2725
    }
2726
}
2727

    
2728
/**
2729
 * Process a macroblock; this case avoids checks for expensive uncommon cases.
2730
 */
2731
static void hl_decode_mb_simple(H264Context *h){
2732
    hl_decode_mb_internal(h, 1);
2733
}
2734

    
2735
/**
2736
 * Process a macroblock; this handles edge cases, such as interlacing.
2737
 */
2738
static void av_noinline hl_decode_mb_complex(H264Context *h){
2739
    hl_decode_mb_internal(h, 0);
2740
}
2741

    
2742
static void hl_decode_mb(H264Context *h){
2743
    MpegEncContext * const s = &h->s;
2744
    const int mb_xy= h->mb_xy;
2745
    const int mb_type= s->current_picture.mb_type[mb_xy];
2746
    int is_complex = FRAME_MBAFF || MB_FIELD || IS_INTRA_PCM(mb_type) || s->codec_id != CODEC_ID_H264 ||
2747
                    (ENABLE_GRAY && (s->flags&CODEC_FLAG_GRAY)) || (ENABLE_H264_ENCODER && s->encoding) || ENABLE_SMALL;
2748

    
2749
    if(ENABLE_H264_ENCODER && !s->decode)
2750
        return;
2751

    
2752
    if (is_complex)
2753
        hl_decode_mb_complex(h);
2754
    else hl_decode_mb_simple(h);
2755
}
2756

    
2757
static void pic_as_field(Picture *pic, const int parity){
2758
    int i;
2759
    for (i = 0; i < 4; ++i) {
2760
        if (parity == PICT_BOTTOM_FIELD)
2761
            pic->data[i] += pic->linesize[i];
2762
        pic->reference = parity;
2763
        pic->linesize[i] *= 2;
2764
    }
2765
}
2766

    
2767
static int split_field_copy(Picture *dest, Picture *src,
2768
                            int parity, int id_add){
2769
    int match = !!(src->reference & parity);
2770

    
2771
    if (match) {
2772
        *dest = *src;
2773
        if(parity != PICT_FRAME){
2774
            pic_as_field(dest, parity);
2775
            dest->pic_id *= 2;
2776
            dest->pic_id += id_add;
2777
        }
2778
    }
2779

    
2780
    return match;
2781
}
2782

    
2783
static int build_def_list(Picture *def, Picture **in, int len, int is_long, int sel){
2784
    int i[2]={0};
2785
    int index=0;
2786

    
2787
    while(i[0]<len || i[1]<len){
2788
        while(i[0]<len && !(in[ i[0] ] && (in[ i[0] ]->reference & sel)))
2789
            i[0]++;
2790
        while(i[1]<len && !(in[ i[1] ] && (in[ i[1] ]->reference & (sel^3))))
2791
            i[1]++;
2792
        if(i[0] < len){
2793
            in[ i[0] ]->pic_id= is_long ? i[0] : in[ i[0] ]->frame_num;
2794
            split_field_copy(&def[index++], in[ i[0]++ ], sel  , 1);
2795
        }
2796
        if(i[1] < len){
2797
            in[ i[1] ]->pic_id= is_long ? i[1] : in[ i[1] ]->frame_num;
2798
            split_field_copy(&def[index++], in[ i[1]++ ], sel^3, 0);
2799
        }
2800
    }
2801

    
2802
    return index;
2803
}
2804

    
2805
static int add_sorted(Picture **sorted, Picture **src, int len, int limit, int dir){
2806
    int i, best_poc;
2807
    int out_i= 0;
2808

    
2809
    for(;;){
2810
        best_poc= dir ? INT_MIN : INT_MAX;
2811

    
2812
        for(i=0; i<len; i++){
2813
            const int poc= src[i]->poc;
2814
            if(((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)){
2815
                best_poc= poc;
2816
                sorted[out_i]= src[i];
2817
            }
2818
        }
2819
        if(best_poc == (dir ? INT_MIN : INT_MAX))
2820
            break;
2821
        limit= sorted[out_i++]->poc - dir;
2822
    }
2823
    return out_i;
2824
}
2825

    
2826
/**
2827
 * fills the default_ref_list.
2828
 */
2829
static int fill_default_ref_list(H264Context *h){
2830
    MpegEncContext * const s = &h->s;
2831
    int i, len;
2832

    
2833
    if(h->slice_type_nos==FF_B_TYPE){
2834
        Picture *sorted[32];
2835
        int cur_poc, list;
2836
        int lens[2];
2837

    
2838
        if(FIELD_PICTURE)
2839
            cur_poc= s->current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
2840
        else
2841
            cur_poc= s->current_picture_ptr->poc;
2842

    
2843
        for(list= 0; list<2; list++){
2844
            len= add_sorted(sorted    , h->short_ref, h->short_ref_count, cur_poc, 1^list);
2845
            len+=add_sorted(sorted+len, h->short_ref, h->short_ref_count, cur_poc, 0^list);
2846
            assert(len<=32);
2847
            len= build_def_list(h->default_ref_list[list]    , sorted     , len, 0, s->picture_structure);
2848
            len+=build_def_list(h->default_ref_list[list]+len, h->long_ref, 16 , 1, s->picture_structure);
2849
            assert(len<=32);
2850

    
2851
            if(len < h->ref_count[list])
2852
                memset(&h->default_ref_list[list][len], 0, sizeof(Picture)*(h->ref_count[list] - len));
2853
            lens[list]= len;
2854
        }
2855

    
2856
        if(lens[0] == lens[1] && lens[1] > 1){
2857
            for(i=0; h->default_ref_list[0][i].data[0] == h->default_ref_list[1][i].data[0] && i<lens[0]; i++);
2858
            if(i == lens[0])
2859
                FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]);
2860
        }
2861
    }else{
2862
        len = build_def_list(h->default_ref_list[0]    , h->short_ref, h->short_ref_count, 0, s->picture_structure);
2863
        len+= build_def_list(h->default_ref_list[0]+len, h-> long_ref, 16                , 1, s->picture_structure);
2864
        assert(len <= 32);
2865
        if(len < h->ref_count[0])
2866
            memset(&h->default_ref_list[0][len], 0, sizeof(Picture)*(h->ref_count[0] - len));
2867
    }
2868
#ifdef TRACE
2869
    for (i=0; i<h->ref_count[0]; i++) {
2870
        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]);
2871
    }
2872
    if(h->slice_type_nos==FF_B_TYPE){
2873
        for (i=0; i<h->ref_count[1]; i++) {
2874
            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]);
2875
        }
2876
    }
2877
#endif
2878
    return 0;
2879
}
2880

    
2881
static void print_short_term(H264Context *h);
2882
static void print_long_term(H264Context *h);
2883

    
2884
/**
2885
 * Extract structure information about the picture described by pic_num in
2886
 * the current decoding context (frame or field). Note that pic_num is
2887
 * picture number without wrapping (so, 0<=pic_num<max_pic_num).
2888
 * @param pic_num picture number for which to extract structure information
2889
 * @param structure one of PICT_XXX describing structure of picture
2890
 *                      with pic_num
2891
 * @return frame number (short term) or long term index of picture
2892
 *         described by pic_num
2893
 */
2894
static int pic_num_extract(H264Context *h, int pic_num, int *structure){
2895
    MpegEncContext * const s = &h->s;
2896

    
2897
    *structure = s->picture_structure;
2898
    if(FIELD_PICTURE){
2899
        if (!(pic_num & 1))
2900
            /* opposite field */
2901
            *structure ^= PICT_FRAME;
2902
        pic_num >>= 1;
2903
    }
2904

    
2905
    return pic_num;
2906
}
2907

    
2908
static int decode_ref_pic_list_reordering(H264Context *h){
2909
    MpegEncContext * const s = &h->s;
2910
    int list, index, pic_structure;
2911

    
2912
    print_short_term(h);
2913
    print_long_term(h);
2914

    
2915
    for(list=0; list<h->list_count; list++){
2916
        memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]);
2917

    
2918
        if(get_bits1(&s->gb)){
2919
            int pred= h->curr_pic_num;
2920

    
2921
            for(index=0; ; index++){
2922
                unsigned int reordering_of_pic_nums_idc= get_ue_golomb(&s->gb);
2923
                unsigned int pic_id;
2924
                int i;
2925
                Picture *ref = NULL;
2926

    
2927
                if(reordering_of_pic_nums_idc==3)
2928
                    break;
2929

    
2930
                if(index >= h->ref_count[list]){
2931
                    av_log(h->s.avctx, AV_LOG_ERROR, "reference count overflow\n");
2932
                    return -1;
2933
                }
2934

    
2935
                if(reordering_of_pic_nums_idc<3){
2936
                    if(reordering_of_pic_nums_idc<2){
2937
                        const unsigned int abs_diff_pic_num= get_ue_golomb(&s->gb) + 1;
2938
                        int frame_num;
2939

    
2940
                        if(abs_diff_pic_num > h->max_pic_num){
2941
                            av_log(h->s.avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n");
2942
                            return -1;
2943
                        }
2944

    
2945
                        if(reordering_of_pic_nums_idc == 0) pred-= abs_diff_pic_num;
2946
                        else                                pred+= abs_diff_pic_num;
2947
                        pred &= h->max_pic_num - 1;
2948

    
2949
                        frame_num = pic_num_extract(h, pred, &pic_structure);
2950

    
2951
                        for(i= h->short_ref_count-1; i>=0; i--){
2952
                            ref = h->short_ref[i];
2953
                            assert(ref->reference);
2954
                            assert(!ref->long_ref);
2955
                            if(
2956
                                   ref->frame_num == frame_num &&
2957
                                   (ref->reference & pic_structure)
2958
                              )
2959
                                break;
2960
                        }
2961
                        if(i>=0)
2962
                            ref->pic_id= pred;
2963
                    }else{
2964
                        int long_idx;
2965
                        pic_id= get_ue_golomb(&s->gb); //long_term_pic_idx
2966

    
2967
                        long_idx= pic_num_extract(h, pic_id, &pic_structure);
2968

    
2969
                        if(long_idx>31){
2970
                            av_log(h->s.avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n");
2971
                            return -1;
2972
                        }
2973
                        ref = h->long_ref[long_idx];
2974
                        assert(!(ref && !ref->reference));
2975
                        if(ref && (ref->reference & pic_structure)){
2976
                            ref->pic_id= pic_id;
2977
                            assert(ref->long_ref);
2978
                            i=0;
2979
                        }else{
2980
                            i=-1;
2981
                        }
2982
                    }
2983

    
2984
                    if (i < 0) {
2985
                        av_log(h->s.avctx, AV_LOG_ERROR, "reference picture missing during reorder\n");
2986
                        memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME
2987
                    } else {
2988
                        for(i=index; i+1<h->ref_count[list]; i++){
2989
                            if(ref->long_ref == h->ref_list[list][i].long_ref && ref->pic_id == h->ref_list[list][i].pic_id)
2990
                                break;
2991
                        }
2992
                        for(; i > index; i--){
2993
                            h->ref_list[list][i]= h->ref_list[list][i-1];
2994
                        }
2995
                        h->ref_list[list][index]= *ref;
2996
                        if (FIELD_PICTURE){
2997
                            pic_as_field(&h->ref_list[list][index], pic_structure);
2998
                        }
2999
                    }
3000
                }else{
3001
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n");
3002
                    return -1;
3003
                }
3004
            }
3005
        }
3006
    }
3007
    for(list=0; list<h->list_count; list++){
3008
        for(index= 0; index < h->ref_count[list]; index++){
3009
            if(!h->ref_list[list][index].data[0]){
3010
                av_log(h->s.avctx, AV_LOG_ERROR, "Missing reference picture\n");
3011
                h->ref_list[list][index]= s->current_picture; //FIXME this is not a sensible solution
3012
            }
3013
        }
3014
    }
3015

    
3016
    if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
3017
        direct_dist_scale_factor(h);
3018
    direct_ref_list_init(h);
3019
    return 0;
3020
}
3021

    
3022
static void fill_mbaff_ref_list(H264Context *h){
3023
    int list, i, j;
3024
    for(list=0; list<2; list++){ //FIXME try list_count
3025
        for(i=0; i<h->ref_count[list]; i++){
3026
            Picture *frame = &h->ref_list[list][i];
3027
            Picture *field = &h->ref_list[list][16+2*i];
3028
            field[0] = *frame;
3029
            for(j=0; j<3; j++)
3030
                field[0].linesize[j] <<= 1;
3031
            field[0].reference = PICT_TOP_FIELD;
3032
            field[1] = field[0];
3033
            for(j=0; j<3; j++)
3034
                field[1].data[j] += frame->linesize[j];
3035
            field[1].reference = PICT_BOTTOM_FIELD;
3036

    
3037
            h->luma_weight[list][16+2*i] = h->luma_weight[list][16+2*i+1] = h->luma_weight[list][i];
3038
            h->luma_offset[list][16+2*i] = h->luma_offset[list][16+2*i+1] = h->luma_offset[list][i];
3039
            for(j=0; j<2; j++){
3040
                h->chroma_weight[list][16+2*i][j] = h->chroma_weight[list][16+2*i+1][j] = h->chroma_weight[list][i][j];
3041
                h->chroma_offset[list][16+2*i][j] = h->chroma_offset[list][16+2*i+1][j] = h->chroma_offset[list][i][j];
3042
            }
3043
        }
3044
    }
3045
    for(j=0; j<h->ref_count[1]; j++){
3046
        for(i=0; i<h->ref_count[0]; i++)
3047
            h->implicit_weight[j][16+2*i] = h->implicit_weight[j][16+2*i+1] = h->implicit_weight[j][i];
3048
        memcpy(h->implicit_weight[16+2*j],   h->implicit_weight[j], sizeof(*h->implicit_weight));
3049
        memcpy(h->implicit_weight[16+2*j+1], h->implicit_weight[j], sizeof(*h->implicit_weight));
3050
    }
3051
}
3052

    
3053
static int pred_weight_table(H264Context *h){
3054
    MpegEncContext * const s = &h->s;
3055
    int list, i;
3056
    int luma_def, chroma_def;
3057

    
3058
    h->use_weight= 0;
3059
    h->use_weight_chroma= 0;
3060
    h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
3061
    h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
3062
    luma_def = 1<<h->luma_log2_weight_denom;
3063
    chroma_def = 1<<h->chroma_log2_weight_denom;
3064

    
3065
    for(list=0; list<2; list++){
3066
        for(i=0; i<h->ref_count[list]; i++){
3067
            int luma_weight_flag, chroma_weight_flag;
3068

    
3069
            luma_weight_flag= get_bits1(&s->gb);
3070
            if(luma_weight_flag){
3071
                h->luma_weight[list][i]= get_se_golomb(&s->gb);
3072
                h->luma_offset[list][i]= get_se_golomb(&s->gb);
3073
                if(   h->luma_weight[list][i] != luma_def
3074
                   || h->luma_offset[list][i] != 0)
3075
                    h->use_weight= 1;
3076
            }else{
3077
                h->luma_weight[list][i]= luma_def;
3078
                h->luma_offset[list][i]= 0;
3079
            }
3080

    
3081
            if(CHROMA){
3082
                chroma_weight_flag= get_bits1(&s->gb);
3083
                if(chroma_weight_flag){
3084
                    int j;
3085
                    for(j=0; j<2; j++){
3086
                        h->chroma_weight[list][i][j]= get_se_golomb(&s->gb);
3087
                        h->chroma_offset[list][i][j]= get_se_golomb(&s->gb);
3088
                        if(   h->chroma_weight[list][i][j] != chroma_def
3089
                        || h->chroma_offset[list][i][j] != 0)
3090
                            h->use_weight_chroma= 1;
3091
                    }
3092
                }else{
3093
                    int j;
3094
                    for(j=0; j<2; j++){
3095
                        h->chroma_weight[list][i][j]= chroma_def;
3096
                        h->chroma_offset[list][i][j]= 0;
3097
                    }
3098
                }
3099
            }
3100
        }
3101
        if(h->slice_type_nos != FF_B_TYPE) break;
3102
    }
3103
    h->use_weight= h->use_weight || h->use_weight_chroma;
3104
    return 0;
3105
}
3106

    
3107
static void implicit_weight_table(H264Context *h){
3108
    MpegEncContext * const s = &h->s;
3109
    int ref0, ref1;
3110
    int cur_poc = s->current_picture_ptr->poc;
3111

    
3112
    if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
3113
       && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
3114
        h->use_weight= 0;
3115
        h->use_weight_chroma= 0;
3116
        return;
3117
    }
3118

    
3119
    h->use_weight= 2;
3120
    h->use_weight_chroma= 2;
3121
    h->luma_log2_weight_denom= 5;
3122
    h->chroma_log2_weight_denom= 5;
3123

    
3124
    for(ref0=0; ref0 < h->ref_count[0]; ref0++){
3125
        int poc0 = h->ref_list[0][ref0].poc;
3126
        for(ref1=0; ref1 < h->ref_count[1]; ref1++){
3127
            int poc1 = h->ref_list[1][ref1].poc;
3128
            int td = av_clip(poc1 - poc0, -128, 127);
3129
            if(td){
3130
                int tb = av_clip(cur_poc - poc0, -128, 127);
3131
                int tx = (16384 + (FFABS(td) >> 1)) / td;
3132
                int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
3133
                if(dist_scale_factor < -64 || dist_scale_factor > 128)
3134
                    h->implicit_weight[ref0][ref1] = 32;
3135
                else
3136
                    h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
3137
            }else
3138
                h->implicit_weight[ref0][ref1] = 32;
3139
        }
3140
    }
3141
}
3142

    
3143
/**
3144
 * Mark a picture as no longer needed for reference. The refmask
3145
 * argument allows unreferencing of individual fields or the whole frame.
3146
 * If the picture becomes entirely unreferenced, but is being held for
3147
 * display purposes, it is marked as such.
3148
 * @param refmask mask of fields to unreference; the mask is bitwise
3149
 *                anded with the reference marking of pic
3150
 * @return non-zero if pic becomes entirely unreferenced (except possibly
3151
 *         for display purposes) zero if one of the fields remains in
3152
 *         reference
3153
 */
3154
static inline int unreference_pic(H264Context *h, Picture *pic, int refmask){
3155
    int i;
3156
    if (pic->reference &= refmask) {
3157
        return 0;
3158
    } else {
3159
        for(i = 0; h->delayed_pic[i]; i++)
3160
            if(pic == h->delayed_pic[i]){
3161
                pic->reference=DELAYED_PIC_REF;
3162
                break;
3163
            }
3164
        return 1;
3165
    }
3166
}
3167

    
3168
/**
3169
 * instantaneous decoder refresh.
3170
 */
3171
static void idr(H264Context *h){
3172
    int i;
3173

    
3174
    for(i=0; i<16; i++){
3175
        remove_long(h, i, 0);
3176
    }
3177
    assert(h->long_ref_count==0);
3178

    
3179
    for(i=0; i<h->short_ref_count; i++){
3180
        unreference_pic(h, h->short_ref[i], 0);
3181
        h->short_ref[i]= NULL;
3182
    }
3183
    h->short_ref_count=0;
3184
    h->prev_frame_num= 0;
3185
    h->prev_frame_num_offset= 0;
3186
    h->prev_poc_msb=
3187
    h->prev_poc_lsb= 0;
3188
}
3189

    
3190
/* forget old pics after a seek */
3191
static void flush_dpb(AVCodecContext *avctx){
3192
    H264Context *h= avctx->priv_data;
3193
    int i;
3194
    for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
3195
        if(h->delayed_pic[i])
3196
            h->delayed_pic[i]->reference= 0;
3197
        h->delayed_pic[i]= NULL;
3198
    }
3199
    h->outputed_poc= INT_MIN;
3200
    idr(h);
3201
    if(h->s.current_picture_ptr)
3202
        h->s.current_picture_ptr->reference= 0;
3203
    h->s.first_field= 0;
3204
    ff_mpeg_flush(avctx);
3205
}
3206

    
3207
/**
3208
 * Find a Picture in the short term reference list by frame number.
3209
 * @param frame_num frame number to search for
3210
 * @param idx the index into h->short_ref where returned picture is found
3211
 *            undefined if no picture found.
3212
 * @return pointer to the found picture, or NULL if no pic with the provided
3213
 *                 frame number is found
3214
 */
3215
static Picture * find_short(H264Context *h, int frame_num, int *idx){
3216
    MpegEncContext * const s = &h->s;
3217
    int i;
3218

    
3219
    for(i=0; i<h->short_ref_count; i++){
3220
        Picture *pic= h->short_ref[i];
3221
        if(s->avctx->debug&FF_DEBUG_MMCO)
3222
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
3223
        if(pic->frame_num == frame_num) {
3224
            *idx = i;
3225
            return pic;
3226
        }
3227
    }
3228
    return NULL;
3229
}
3230

    
3231
/**
3232
 * Remove a picture from the short term reference list by its index in
3233
 * that list.  This does no checking on the provided index; it is assumed
3234
 * to be valid. Other list entries are shifted down.
3235
 * @param i index into h->short_ref of picture to remove.
3236
 */
3237
static void remove_short_at_index(H264Context *h, int i){
3238
    assert(i >= 0 && i < h->short_ref_count);
3239
    h->short_ref[i]= NULL;
3240
    if (--h->short_ref_count)
3241
        memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i)*sizeof(Picture*));
3242
}
3243

    
3244
/**
3245
 *
3246
 * @return the removed picture or NULL if an error occurs
3247
 */
3248
static Picture * remove_short(H264Context *h, int frame_num, int ref_mask){
3249
    MpegEncContext * const s = &h->s;
3250
    Picture *pic;
3251
    int i;
3252

    
3253
    if(s->avctx->debug&FF_DEBUG_MMCO)
3254
        av_log(h->s.avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);
3255

    
3256
    pic = find_short(h, frame_num, &i);
3257
    if (pic){
3258
        if(unreference_pic(h, pic, ref_mask))
3259
        remove_short_at_index(h, i);
3260
    }
3261

    
3262
    return pic;
3263
}
3264

    
3265
/**
3266
 * Remove a picture from the long term reference list by its index in
3267
 * that list.
3268
 * @return the removed picture or NULL if an error occurs
3269
 */
3270
static Picture * remove_long(H264Context *h, int i, int ref_mask){
3271
    Picture *pic;
3272

    
3273
    pic= h->long_ref[i];
3274
    if (pic){
3275
        if(unreference_pic(h, pic, ref_mask)){
3276
            assert(h->long_ref[i]->long_ref == 1);
3277
            h->long_ref[i]->long_ref= 0;
3278
            h->long_ref[i]= NULL;
3279
            h->long_ref_count--;
3280
        }
3281
    }
3282

    
3283
    return pic;
3284
}
3285

    
3286
/**
3287
 * print short term list
3288
 */
3289
static void print_short_term(H264Context *h) {
3290
    uint32_t i;
3291
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3292
        av_log(h->s.avctx, AV_LOG_DEBUG, "short term list:\n");
3293
        for(i=0; i<h->short_ref_count; i++){
3294
            Picture *pic= h->short_ref[i];
3295
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3296
        }
3297
    }
3298
}
3299

    
3300
/**
3301
 * print long term list
3302
 */
3303
static void print_long_term(H264Context *h) {
3304
    uint32_t i;
3305
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3306
        av_log(h->s.avctx, AV_LOG_DEBUG, "long term list:\n");
3307
        for(i = 0; i < 16; i++){
3308
            Picture *pic= h->long_ref[i];
3309
            if (pic) {
3310
                av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3311
            }
3312
        }
3313
    }
3314
}
3315

    
3316
/**
3317
 * Executes the reference picture marking (memory management control operations).
3318
 */
3319
static int execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
3320
    MpegEncContext * const s = &h->s;
3321
    int i, j;
3322
    int current_ref_assigned=0;
3323
    Picture *pic;
3324

    
3325
    if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0)
3326
        av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n");
3327

    
3328
    for(i=0; i<mmco_count; i++){
3329
        int structure, frame_num;
3330
        if(s->avctx->debug&FF_DEBUG_MMCO)
3331
            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);
3332

    
3333
        if(   mmco[i].opcode == MMCO_SHORT2UNUSED
3334
           || mmco[i].opcode == MMCO_SHORT2LONG){
3335
            frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure);
3336
            pic = find_short(h, frame_num, &j);
3337
            if(!pic){
3338
                if(mmco[i].opcode != MMCO_SHORT2LONG || !h->long_ref[mmco[i].long_arg]
3339
                   || h->long_ref[mmco[i].long_arg]->frame_num != frame_num)
3340
                av_log(h->s.avctx, AV_LOG_ERROR, "mmco: unref short failure\n");
3341
                continue;
3342
            }
3343
        }
3344

    
3345
        switch(mmco[i].opcode){
3346
        case MMCO_SHORT2UNUSED:
3347
            if(s->avctx->debug&FF_DEBUG_MMCO)
3348
                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);
3349
            remove_short(h, frame_num, structure ^ PICT_FRAME);
3350
            break;
3351
        case MMCO_SHORT2LONG:
3352
                if (h->long_ref[mmco[i].long_arg] != pic)
3353
                    remove_long(h, mmco[i].long_arg, 0);
3354

    
3355
                remove_short_at_index(h, j);
3356
                h->long_ref[ mmco[i].long_arg ]= pic;
3357
                if (h->long_ref[ mmco[i].long_arg ]){
3358
                    h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3359
                    h->long_ref_count++;
3360
                }
3361
            break;
3362
        case MMCO_LONG2UNUSED:
3363
            j = pic_num_extract(h, mmco[i].long_arg, &structure);
3364
            pic = h->long_ref[j];
3365
            if (pic) {
3366
                remove_long(h, j, structure ^ PICT_FRAME);
3367
            } else if(s->avctx->debug&FF_DEBUG_MMCO)
3368
                av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
3369
            break;
3370
        case MMCO_LONG:
3371
                    // Comment below left from previous code as it is an interresting note.
3372
                    /* First field in pair is in short term list or
3373
                     * at a different long term index.
3374
                     * This is not allowed; see 7.4.3.3, notes 2 and 3.
3375
                     * Report the problem and keep the pair where it is,
3376
                     * and mark this field valid.
3377
                     */
3378

    
3379
            if (h->long_ref[mmco[i].long_arg] != s->current_picture_ptr) {
3380
                remove_long(h, mmco[i].long_arg, 0);
3381

    
3382
                h->long_ref[ mmco[i].long_arg ]= s->current_picture_ptr;
3383
                h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3384
                h->long_ref_count++;
3385
            }
3386

    
3387
            s->current_picture_ptr->reference |= s->picture_structure;
3388
            current_ref_assigned=1;
3389
            break;
3390
        case MMCO_SET_MAX_LONG:
3391
            assert(mmco[i].long_arg <= 16);
3392
            // just remove the long term which index is greater than new max
3393
            for(j = mmco[i].long_arg; j<16; j++){
3394
                remove_long(h, j, 0);
3395
            }
3396
            break;
3397
        case MMCO_RESET:
3398
            while(h->short_ref_count){
3399
                remove_short(h, h->short_ref[0]->frame_num, 0);
3400
            }
3401
            for(j = 0; j < 16; j++) {
3402
                remove_long(h, j, 0);
3403
            }
3404
            s->current_picture_ptr->poc=
3405
            s->current_picture_ptr->field_poc[0]=
3406
            s->current_picture_ptr->field_poc[1]=
3407
            h->poc_lsb=
3408
            h->poc_msb=
3409
            h->frame_num=
3410
            s->current_picture_ptr->frame_num= 0;
3411
            break;
3412
        default: assert(0);
3413
        }
3414
    }
3415

    
3416
    if (!current_ref_assigned) {
3417
        /* Second field of complementary field pair; the first field of
3418
         * which is already referenced. If short referenced, it
3419
         * should be first entry in short_ref. If not, it must exist
3420
         * in long_ref; trying to put it on the short list here is an
3421
         * error in the encoded bit stream (ref: 7.4.3, NOTE 2 and 3).
3422
         */
3423
        if (h->short_ref_count && h->short_ref[0] == s->current_picture_ptr) {
3424
            /* Just mark the second field valid */
3425
            s->current_picture_ptr->reference = PICT_FRAME;
3426
        } else if (s->current_picture_ptr->long_ref) {
3427
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term reference "
3428
                                             "assignment for second field "
3429
                                             "in complementary field pair "
3430
                                             "(first field is long term)\n");
3431
        } else {
3432
            pic= remove_short(h, s->current_picture_ptr->frame_num, 0);
3433
            if(pic){
3434
                av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
3435
            }
3436

    
3437
            if(h->short_ref_count)
3438
                memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
3439

    
3440
            h->short_ref[0]= s->current_picture_ptr;
3441
            h->short_ref_count++;
3442
            s->current_picture_ptr->reference |= s->picture_structure;
3443
        }
3444
    }
3445

    
3446
    if (h->long_ref_count + h->short_ref_count > h->sps.ref_frame_count){
3447

    
3448
        /* We have too many reference frames, probably due to corrupted
3449
         * stream. Need to discard one frame. Prevents overrun of the
3450
         * short_ref and long_ref buffers.
3451
         */
3452
        av_log(h->s.avctx, AV_LOG_ERROR,
3453
               "number of reference frames exceeds max (probably "
3454
               "corrupt input), discarding one\n");
3455

    
3456
        if (h->long_ref_count && !h->short_ref_count) {
3457
            for (i = 0; i < 16; ++i)
3458
                if (h->long_ref[i])
3459
                    break;
3460

    
3461
            assert(i < 16);
3462
            remove_long(h, i, 0);
3463
        } else {
3464
            pic = h->short_ref[h->short_ref_count - 1];
3465
            remove_short(h, pic->frame_num, 0);
3466
        }
3467
    }
3468

    
3469
    print_short_term(h);
3470
    print_long_term(h);
3471
    return 0;
3472
}
3473

    
3474
static int decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
3475
    MpegEncContext * const s = &h->s;
3476
    int i;
3477

    
3478
    h->mmco_index= 0;
3479
    if(h->nal_unit_type == NAL_IDR_SLICE){ //FIXME fields
3480
        s->broken_link= get_bits1(gb) -1;
3481
        if(get_bits1(gb)){
3482
            h->mmco[0].opcode= MMCO_LONG;
3483
            h->mmco[0].long_arg= 0;
3484
            h->mmco_index= 1;
3485
        }
3486
    }else{
3487
        if(get_bits1(gb)){ // adaptive_ref_pic_marking_mode_flag
3488
            for(i= 0; i<MAX_MMCO_COUNT; i++) {
3489
                MMCOOpcode opcode= get_ue_golomb(gb);
3490

    
3491
                h->mmco[i].opcode= opcode;
3492
                if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){
3493
                    h->mmco[i].short_pic_num= (h->curr_pic_num - get_ue_golomb(gb) - 1) & (h->max_pic_num - 1);
3494
/*                    if(h->mmco[i].short_pic_num >= h->short_ref_count || h->short_ref[ h->mmco[i].short_pic_num ] == NULL){
3495
                        av_log(s->avctx, AV_LOG_ERROR, "illegal short ref in memory management control operation %d\n", mmco);
3496
                        return -1;
3497
                    }*/
3498
                }
3499
                if(opcode==MMCO_SHORT2LONG || opcode==MMCO_LONG2UNUSED || opcode==MMCO_LONG || opcode==MMCO_SET_MAX_LONG){
3500
                    unsigned int long_arg= get_ue_golomb(gb);
3501
                    if(long_arg >= 32 || (long_arg >= 16 && !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE))){
3502
                        av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode);
3503
                        return -1;
3504
                    }
3505
                    h->mmco[i].long_arg= long_arg;
3506
                }
3507

    
3508
                if(opcode > (unsigned)MMCO_LONG){
3509
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode);
3510
                    return -1;
3511
                }
3512
                if(opcode == MMCO_END)
3513
                    break;
3514
            }
3515
            h->mmco_index= i;
3516
        }else{
3517
            assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
3518

    
3519
            if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
3520
                    !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
3521
                h->mmco[0].opcode= MMCO_SHORT2UNUSED;
3522
                h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
3523
                h->mmco_index= 1;
3524
                if (FIELD_PICTURE) {
3525
                    h->mmco[0].short_pic_num *= 2;
3526
                    h->mmco[1].opcode= MMCO_SHORT2UNUSED;
3527
                    h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
3528
                    h->mmco_index= 2;
3529
                }
3530
            }
3531
        }
3532
    }
3533

    
3534
    return 0;
3535
}
3536

    
3537
static int init_poc(H264Context *h){
3538
    MpegEncContext * const s = &h->s;
3539
    const int max_frame_num= 1<<h->sps.log2_max_frame_num;
3540
    int field_poc[2];
3541
    Picture *cur = s->current_picture_ptr;
3542

    
3543
    h->frame_num_offset= h->prev_frame_num_offset;
3544
    if(h->frame_num < h->prev_frame_num)
3545
        h->frame_num_offset += max_frame_num;
3546

    
3547
    if(h->sps.poc_type==0){
3548
        const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
3549

    
3550
        if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
3551
            h->poc_msb = h->prev_poc_msb + max_poc_lsb;
3552
        else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
3553
            h->poc_msb = h->prev_poc_msb - max_poc_lsb;
3554
        else
3555
            h->poc_msb = h->prev_poc_msb;
3556
//printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
3557
        field_poc[0] =
3558
        field_poc[1] = h->poc_msb + h->poc_lsb;
3559
        if(s->picture_structure == PICT_FRAME)
3560
            field_poc[1] += h->delta_poc_bottom;
3561
    }else if(h->sps.poc_type==1){
3562
        int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
3563
        int i;
3564

    
3565
        if(h->sps.poc_cycle_length != 0)
3566
            abs_frame_num = h->frame_num_offset + h->frame_num;
3567
        else
3568
            abs_frame_num = 0;
3569

    
3570
        if(h->nal_ref_idc==0 && abs_frame_num > 0)
3571
            abs_frame_num--;
3572

    
3573
        expected_delta_per_poc_cycle = 0;
3574
        for(i=0; i < h->sps.poc_cycle_length; i++)
3575
            expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
3576

    
3577
        if(abs_frame_num > 0){
3578
            int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
3579
            int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
3580

    
3581
            expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
3582
            for(i = 0; i <= frame_num_in_poc_cycle; i++)
3583
                expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
3584
        } else
3585
            expectedpoc = 0;
3586

    
3587
        if(h->nal_ref_idc == 0)
3588
            expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
3589

    
3590
        field_poc[0] = expectedpoc + h->delta_poc[0];
3591
        field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
3592

    
3593
        if(s->picture_structure == PICT_FRAME)
3594
            field_poc[1] += h->delta_poc[1];
3595
    }else{
3596
        int poc= 2*(h->frame_num_offset + h->frame_num);
3597

    
3598
        if(!h->nal_ref_idc)
3599
            poc--;
3600

    
3601
        field_poc[0]= poc;
3602
        field_poc[1]= poc;
3603
    }
3604

    
3605
    if(s->picture_structure != PICT_BOTTOM_FIELD)
3606
        s->current_picture_ptr->field_poc[0]= field_poc[0];
3607
    if(s->picture_structure != PICT_TOP_FIELD)
3608
        s->current_picture_ptr->field_poc[1]= field_poc[1];
3609
    cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
3610

    
3611
    return 0;
3612
}
3613

    
3614

    
3615
/**
3616
 * initialize scan tables
3617
 */
3618
static void init_scan_tables(H264Context *h){
3619
    MpegEncContext * const s = &h->s;
3620
    int i;
3621
    if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
3622
        memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
3623
        memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
3624
    }else{
3625
        for(i=0; i<16; i++){
3626
#define T(x) (x>>2) | ((x<<2) & 0xF)
3627
            h->zigzag_scan[i] = T(zigzag_scan[i]);
3628
            h-> field_scan[i] = T( field_scan[i]);
3629
#undef T
3630
        }
3631
    }
3632
    if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
3633
        memcpy(h->zigzag_scan8x8,       zigzag_scan8x8,       64*sizeof(uint8_t));
3634
        memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
3635
        memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
3636
        memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
3637
    }else{
3638
        for(i=0; i<64; i++){
3639
#define T(x) (x>>3) | ((x&7)<<3)
3640
            h->zigzag_scan8x8[i]       = T(zigzag_scan8x8[i]);
3641
            h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
3642
            h->field_scan8x8[i]        = T(field_scan8x8[i]);
3643
            h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
3644
#undef T
3645
        }
3646
    }
3647
    if(h->sps.transform_bypass){ //FIXME same ugly
3648
        h->zigzag_scan_q0          = zigzag_scan;
3649
        h->zigzag_scan8x8_q0       = zigzag_scan8x8;
3650
        h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
3651
        h->field_scan_q0           = field_scan;
3652
        h->field_scan8x8_q0        = field_scan8x8;
3653
        h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
3654
    }else{
3655
        h->zigzag_scan_q0          = h->zigzag_scan;
3656
        h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
3657
        h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
3658
        h->field_scan_q0           = h->field_scan;
3659
        h->field_scan8x8_q0        = h->field_scan8x8;
3660
        h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
3661
    }
3662
}
3663

    
3664
/**
3665
 * Replicates H264 "master" context to thread contexts.
3666
 */
3667
static void clone_slice(H264Context *dst, H264Context *src)
3668
{
3669
    memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
3670
    dst->s.current_picture_ptr  = src->s.current_picture_ptr;
3671
    dst->s.current_picture      = src->s.current_picture;
3672
    dst->s.linesize             = src->s.linesize;
3673
    dst->s.uvlinesize           = src->s.uvlinesize;
3674
    dst->s.first_field          = src->s.first_field;
3675

    
3676
    dst->prev_poc_msb           = src->prev_poc_msb;
3677
    dst->prev_poc_lsb           = src->prev_poc_lsb;
3678
    dst->prev_frame_num_offset  = src->prev_frame_num_offset;
3679
    dst->prev_frame_num         = src->prev_frame_num;
3680
    dst->short_ref_count        = src->short_ref_count;
3681

    
3682
    memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
3683
    memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
3684
    memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
3685
    memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
3686

    
3687
    memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
3688
    memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
3689
}
3690

    
3691
/**
3692
 * decodes a slice header.
3693
 * This will also call MPV_common_init() and frame_start() as needed.
3694
 *
3695
 * @param h h264context
3696
 * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
3697
 *
3698
 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
3699
 */
3700
static int decode_slice_header(H264Context *h, H264Context *h0){
3701
    MpegEncContext * const s = &h->s;
3702
    MpegEncContext * const s0 = &h0->s;
3703
    unsigned int first_mb_in_slice;
3704
    unsigned int pps_id;
3705
    int num_ref_idx_active_override_flag;
3706
    static const uint8_t slice_type_map[5]= {FF_P_TYPE, FF_B_TYPE, FF_I_TYPE, FF_SP_TYPE, FF_SI_TYPE};
3707
    unsigned int slice_type, tmp, i, j;
3708
    int default_ref_list_done = 0;
3709
    int last_pic_structure;
3710

    
3711
    s->dropable= h->nal_ref_idc == 0;
3712

    
3713
    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
3714
        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
3715
        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
3716
    }else{
3717
        s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
3718
        s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
3719
    }
3720

    
3721
    first_mb_in_slice= get_ue_golomb(&s->gb);
3722

    
3723
    if((s->flags2 & CODEC_FLAG2_CHUNKS) && first_mb_in_slice == 0){
3724
        h0->current_slice = 0;
3725
        if (!s0->first_field)
3726
            s->current_picture_ptr= NULL;
3727
    }
3728

    
3729
    slice_type= get_ue_golomb(&s->gb);
3730
    if(slice_type > 9){
3731
        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);
3732
        return -1;
3733
    }
3734
    if(slice_type > 4){
3735
        slice_type -= 5;
3736
        h->slice_type_fixed=1;
3737
    }else
3738
        h->slice_type_fixed=0;
3739

    
3740
    slice_type= slice_type_map[ slice_type ];
3741
    if (slice_type == FF_I_TYPE
3742
        || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
3743
        default_ref_list_done = 1;
3744
    }
3745
    h->slice_type= slice_type;
3746
    h->slice_type_nos= slice_type & 3;
3747

    
3748
    s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
3749
    if (s->pict_type == FF_B_TYPE && s0->last_picture_ptr == NULL) {
3750
        av_log(h->s.avctx, AV_LOG_ERROR,
3751
               "B picture before any references, skipping\n");
3752
        return -1;
3753
    }
3754

    
3755
    pps_id= get_ue_golomb(&s->gb);
3756
    if(pps_id>=MAX_PPS_COUNT){
3757
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
3758
        return -1;
3759
    }
3760
    if(!h0->pps_buffers[pps_id]) {
3761
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS referenced\n");
3762
        return -1;
3763
    }
3764
    h->pps= *h0->pps_buffers[pps_id];
3765

    
3766
    if(!h0->sps_buffers[h->pps.sps_id]) {
3767
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS referenced\n");
3768
        return -1;
3769
    }
3770
    h->sps = *h0->sps_buffers[h->pps.sps_id];
3771

    
3772
    if(h == h0 && h->dequant_coeff_pps != pps_id){
3773
        h->dequant_coeff_pps = pps_id;
3774
        init_dequant_tables(h);
3775
    }
3776

    
3777
    s->mb_width= h->sps.mb_width;
3778
    s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
3779

    
3780
    h->b_stride=  s->mb_width*4;
3781
    h->b8_stride= s->mb_width*2;
3782

    
3783
    s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
3784
    if(h->sps.frame_mbs_only_flag)
3785
        s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
3786
    else
3787
        s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
3788

    
3789
    if (s->context_initialized
3790
        && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
3791
        if(h != h0)
3792
            return -1;   // width / height changed during parallelized decoding
3793
        free_tables(h);
3794
        MPV_common_end(s);
3795
    }
3796
    if (!s->context_initialized) {
3797
        if(h != h0)
3798
            return -1;  // we cant (re-)initialize context during parallel decoding
3799
        if (MPV_common_init(s) < 0)
3800
            return -1;
3801
        s->first_field = 0;
3802

    
3803
        init_scan_tables(h);
3804
        alloc_tables(h);
3805

    
3806
        for(i = 1; i < s->avctx->thread_count; i++) {
3807
            H264Context *c;
3808
            c = h->thread_context[i] = av_malloc(sizeof(H264Context));
3809
            memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
3810
            memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
3811
            c->sps = h->sps;
3812
            c->pps = h->pps;
3813
            init_scan_tables(c);
3814
            clone_tables(c, h);
3815
        }
3816

    
3817
        for(i = 0; i < s->avctx->thread_count; i++)
3818
            if(context_init(h->thread_context[i]) < 0)
3819
                return -1;
3820

    
3821
        s->avctx->width = s->width;
3822
        s->avctx->height = s->height;
3823
        s->avctx->sample_aspect_ratio= h->sps.sar;
3824
        if(!s->avctx->sample_aspect_ratio.den)
3825
            s->avctx->sample_aspect_ratio.den = 1;
3826

    
3827
        if(h->sps.timing_info_present_flag){
3828
            s->avctx->time_base= (AVRational){h->sps.num_units_in_tick * 2, h->sps.time_scale};
3829
            if(h->x264_build > 0 && h->x264_build < 44)
3830
                s->avctx->time_base.den *= 2;
3831
            av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
3832
                      s->avctx->time_base.num, s->avctx->time_base.den, 1<<30);
3833
        }
3834
    }
3835

    
3836
    h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
3837

    
3838
    h->mb_mbaff = 0;
3839
    h->mb_aff_frame = 0;
3840
    last_pic_structure = s0->picture_structure;
3841
    if(h->sps.frame_mbs_only_flag){
3842
        s->picture_structure= PICT_FRAME;
3843
    }else{
3844
        if(get_bits1(&s->gb)) { //field_pic_flag
3845
            s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
3846
        } else {
3847
            s->picture_structure= PICT_FRAME;
3848
            h->mb_aff_frame = h->sps.mb_aff;
3849
        }
3850
    }
3851

    
3852
    if(h0->current_slice == 0){
3853
        while(h->frame_num !=  h->prev_frame_num &&
3854
              h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
3855
            av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
3856
            frame_start(h);
3857
            h->prev_frame_num++;
3858
            h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
3859
            s->current_picture_ptr->frame_num= h->prev_frame_num;
3860
            execute_ref_pic_marking(h, NULL, 0);
3861
        }
3862

    
3863
        /* See if we have a decoded first field looking for a pair... */
3864
        if (s0->first_field) {
3865
            assert(s0->current_picture_ptr);
3866
            assert(s0->current_picture_ptr->data[0]);
3867
            assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
3868

    
3869
            /* figure out if we have a complementary field pair */
3870
            if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
3871
                /*
3872
                 * Previous field is unmatched. Don't display it, but let it
3873
                 * remain for reference if marked as such.
3874
                 */
3875
                s0->current_picture_ptr = NULL;
3876
                s0->first_field = FIELD_PICTURE;
3877

    
3878
            } else {
3879
                if (h->nal_ref_idc &&
3880
                        s0->current_picture_ptr->reference &&
3881
                        s0->current_picture_ptr->frame_num != h->frame_num) {
3882
                    /*
3883
                     * This and previous field were reference, but had
3884
                     * different frame_nums. Consider this field first in
3885
                     * pair. Throw away previous field except for reference
3886
                     * purposes.
3887
                     */
3888
                    s0->first_field = 1;
3889
                    s0->current_picture_ptr = NULL;
3890

    
3891
                } else {
3892
                    /* Second field in complementary pair */
3893
                    s0->first_field = 0;
3894
                }
3895
            }
3896

    
3897
        } else {
3898
            /* Frame or first field in a potentially complementary pair */
3899
            assert(!s0->current_picture_ptr);
3900
            s0->first_field = FIELD_PICTURE;
3901
        }
3902

    
3903
        if((!FIELD_PICTURE || s0->first_field) && frame_start(h) < 0) {
3904
            s0->first_field = 0;
3905
            return -1;
3906
        }
3907
    }
3908
    if(h != h0)
3909
        clone_slice(h, h0);
3910

    
3911
    s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
3912

    
3913
    assert(s->mb_num == s->mb_width * s->mb_height);
3914
    if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
3915
       first_mb_in_slice                    >= s->mb_num){
3916
        av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
3917
        return -1;
3918
    }
3919
    s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
3920
    s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
3921
    if (s->picture_structure == PICT_BOTTOM_FIELD)
3922
        s->resync_mb_y = s->mb_y = s->mb_y + 1;
3923
    assert(s->mb_y < s->mb_height);
3924

    
3925
    if(s->picture_structure==PICT_FRAME){
3926
        h->curr_pic_num=   h->frame_num;
3927
        h->max_pic_num= 1<< h->sps.log2_max_frame_num;
3928
    }else{
3929
        h->curr_pic_num= 2*h->frame_num + 1;
3930
        h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
3931
    }
3932

    
3933
    if(h->nal_unit_type == NAL_IDR_SLICE){
3934
        get_ue_golomb(&s->gb); /* idr_pic_id */
3935
    }
3936

    
3937
    if(h->sps.poc_type==0){
3938
        h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
3939

    
3940
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
3941
            h->delta_poc_bottom= get_se_golomb(&s->gb);
3942
        }
3943
    }
3944

    
3945
    if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
3946
        h->delta_poc[0]= get_se_golomb(&s->gb);
3947

    
3948
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
3949
            h->delta_poc[1]= get_se_golomb(&s->gb);
3950
    }
3951

    
3952
    init_poc(h);
3953

    
3954
    if(h->pps.redundant_pic_cnt_present){
3955
        h->redundant_pic_count= get_ue_golomb(&s->gb);
3956
    }
3957

    
3958
    //set defaults, might be overridden a few lines later
3959
    h->ref_count[0]= h->pps.ref_count[0];
3960
    h->ref_count[1]= h->pps.ref_count[1];
3961

    
3962
    if(h->slice_type_nos != FF_I_TYPE){
3963
        if(h->slice_type_nos == FF_B_TYPE){
3964
            h->direct_spatial_mv_pred= get_bits1(&s->gb);
3965
        }
3966
        num_ref_idx_active_override_flag= get_bits1(&s->gb);
3967

    
3968
        if(num_ref_idx_active_override_flag){
3969
            h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
3970
            if(h->slice_type_nos==FF_B_TYPE)
3971
                h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
3972

    
3973
            if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
3974
                av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
3975
                h->ref_count[0]= h->ref_count[1]= 1;
3976
                return -1;
3977
            }
3978
        }
3979
        if(h->slice_type_nos == FF_B_TYPE)
3980
            h->list_count= 2;
3981
        else
3982
            h->list_count= 1;
3983
    }else
3984
        h->list_count= 0;
3985

    
3986
    if(!default_ref_list_done){
3987
        fill_default_ref_list(h);
3988
    }
3989

    
3990
    if(h->slice_type_nos!=FF_I_TYPE && decode_ref_pic_list_reordering(h) < 0)
3991
        return -1;
3992

    
3993
    if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
3994
       ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
3995
        pred_weight_table(h);
3996
    else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE)
3997
        implicit_weight_table(h);
3998
    else
3999
        h->use_weight = 0;
4000

    
4001
    if(h->nal_ref_idc)
4002
        decode_ref_pic_marking(h0, &s->gb);
4003

    
4004
    if(FRAME_MBAFF)
4005
        fill_mbaff_ref_list(h);
4006

    
4007
    if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
4008
        tmp = get_ue_golomb(&s->gb);
4009
        if(tmp > 2){
4010
            av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
4011
            return -1;
4012
        }
4013
        h->cabac_init_idc= tmp;
4014
    }
4015

    
4016
    h->last_qscale_diff = 0;
4017
    tmp = h->pps.init_qp + get_se_golomb(&s->gb);
4018
    if(tmp>51){
4019
        av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
4020
        return -1;
4021
    }
4022
    s->qscale= tmp;
4023
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
4024
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
4025
    //FIXME qscale / qp ... stuff
4026
    if(h->slice_type == FF_SP_TYPE){
4027
        get_bits1(&s->gb); /* sp_for_switch_flag */
4028
    }
4029
    if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
4030
        get_se_golomb(&s->gb); /* slice_qs_delta */
4031
    }
4032

    
4033
    h->deblocking_filter = 1;
4034
    h->slice_alpha_c0_offset = 0;
4035
    h->slice_beta_offset = 0;
4036
    if( h->pps.deblocking_filter_parameters_present ) {
4037
        tmp= get_ue_golomb(&s->gb);
4038
        if(tmp > 2){
4039
            av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
4040
            return -1;
4041
        }
4042
        h->deblocking_filter= tmp;
4043
        if(h->deblocking_filter < 2)
4044
            h->deblocking_filter^= 1; // 1<->0
4045

    
4046
        if( h->deblocking_filter ) {
4047
            h->slice_alpha_c0_offset = get_se_golomb(&s->gb) << 1;
4048
            h->slice_beta_offset = get_se_golomb(&s->gb) << 1;
4049
        }
4050
    }
4051

    
4052
    if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
4053
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
4054
       ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
4055
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
4056
        h->deblocking_filter= 0;
4057

    
4058
    if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
4059
        if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
4060
            /* Cheat slightly for speed:
4061
               Do not bother to deblock across slices. */
4062
            h->deblocking_filter = 2;
4063
        } else {
4064
            h0->max_contexts = 1;
4065
            if(!h0->single_decode_warning) {
4066
                av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
4067
                h0->single_decode_warning = 1;
4068
            }
4069
            if(h != h0)
4070
                return 1; // deblocking switched inside frame
4071
        }
4072
    }
4073

    
4074
#if 0 //FMO
4075
    if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
4076
        slice_group_change_cycle= get_bits(&s->gb, ?);
4077
#endif
4078

    
4079
    h0->last_slice_type = slice_type;
4080
    h->slice_num = ++h0->current_slice;
4081

    
4082
    for(j=0; j<2; j++){
4083
        int *ref2frm= h->ref2frm[h->slice_num&15][j];
4084
        ref2frm[0]=
4085
        ref2frm[1]= -1;
4086
        for(i=0; i<48; i++)
4087
            ref2frm[i+2]= 4*h->ref_list[j][i].frame_num
4088
                          +(h->ref_list[j][i].reference&3);
4089
    }
4090

    
4091
    h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
4092
    h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
4093

    
4094
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
4095
        av_log(h->s.avctx, AV_LOG_DEBUG, "slice:%d %s mb:%d %c pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
4096
               h->slice_num,
4097
               (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
4098
               first_mb_in_slice,
4099
               av_get_pict_type_char(h->slice_type),
4100
               pps_id, h->frame_num,
4101
               s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
4102
               h->ref_count[0], h->ref_count[1],
4103
               s->qscale,
4104
               h->deblocking_filter, h->slice_alpha_c0_offset/2, h->slice_beta_offset/2,
4105
               h->use_weight,
4106
               h->use_weight==1 && h->use_weight_chroma ? "c" : "",
4107
               h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
4108
               );
4109
    }
4110

    
4111
    return 0;
4112
}
4113

    
4114
/**
4115
 *
4116
 */
4117
static inline int get_level_prefix(GetBitContext *gb){
4118
    unsigned int buf;
4119
    int log;
4120

    
4121
    OPEN_READER(re, gb);
4122
    UPDATE_CACHE(re, gb);
4123
    buf=GET_CACHE(re, gb);
4124

    
4125
    log= 32 - av_log2(buf);
4126
#ifdef TRACE
4127
    print_bin(buf>>(32-log), log);
4128
    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__);
4129
#endif
4130

    
4131
    LAST_SKIP_BITS(re, gb, log);
4132
    CLOSE_READER(re, gb);
4133

    
4134
    return log-1;
4135
}
4136

    
4137
static inline int get_dct8x8_allowed(H264Context *h){
4138
    int i;
4139
    for(i=0; i<4; i++){
4140
        if(!IS_SUB_8X8(h->sub_mb_type[i])
4141
           || (!h->sps.direct_8x8_inference_flag && IS_DIRECT(h->sub_mb_type[i])))
4142
            return 0;
4143
    }
4144
    return 1;
4145
}
4146

    
4147
/**
4148
 * decodes a residual block.
4149
 * @param n block index
4150
 * @param scantable scantable
4151
 * @param max_coeff number of coefficients in the block
4152
 * @return <0 if an error occurred
4153
 */
4154
static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
4155
    MpegEncContext * const s = &h->s;
4156
    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};
4157
    int level[16];
4158
    int zeros_left, coeff_num, coeff_token, total_coeff, i, j, trailing_ones, run_before;
4159

    
4160
    //FIXME put trailing_onex into the context
4161

    
4162
    if(n == CHROMA_DC_BLOCK_INDEX){
4163
        coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
4164
        total_coeff= coeff_token>>2;
4165
    }else{
4166
        if(n == LUMA_DC_BLOCK_INDEX){
4167
            total_coeff= pred_non_zero_count(h, 0);
4168
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
4169
            total_coeff= coeff_token>>2;
4170
        }else{
4171
            total_coeff= pred_non_zero_count(h, n);
4172
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
4173
            total_coeff= coeff_token>>2;
4174
            h->non_zero_count_cache[ scan8[n] ]= total_coeff;
4175
        }
4176
    }
4177

    
4178
    //FIXME set last_non_zero?
4179

    
4180
    if(total_coeff==0)
4181
        return 0;
4182
    if(total_coeff > (unsigned)max_coeff) {
4183
        av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", s->mb_x, s->mb_y, total_coeff);
4184
        return -1;
4185
    }
4186

    
4187
    trailing_ones= coeff_token&3;
4188
    tprintf(h->s.avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
4189
    assert(total_coeff<=16);
4190

    
4191
    for(i=0; i<trailing_ones; i++){
4192
        level[i]= 1 - 2*get_bits1(gb);
4193
    }
4194

    
4195
    if(i<total_coeff) {
4196
        int level_code, mask;
4197
        int suffix_length = total_coeff > 10 && trailing_ones < 3;
4198
        int prefix= get_level_prefix(gb);
4199

    
4200
        //first coefficient has suffix_length equal to 0 or 1
4201
        if(prefix<14){ //FIXME try to build a large unified VLC table for all this
4202
            if(suffix_length)
4203
                level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
4204
            else
4205
                level_code= (prefix<<suffix_length); //part
4206
        }else if(prefix==14){
4207
            if(suffix_length)
4208
                level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
4209
            else
4210
                level_code= prefix + get_bits(gb, 4); //part
4211
        }else{
4212
            level_code= (15<<suffix_length) + get_bits(gb, prefix-3); //part
4213
            if(suffix_length==0) level_code+=15; //FIXME doesn't make (much)sense
4214
            if(prefix>=16)
4215
                level_code += (1<<(prefix-3))-4096;
4216
        }
4217

    
4218
        if(trailing_ones < 3) level_code += 2;
4219

    
4220
        suffix_length = 1;
4221
        if(level_code > 5)
4222
            suffix_length++;
4223
        mask= -(level_code&1);
4224
        level[i]= (((2+level_code)>>1) ^ mask) - mask;
4225
        i++;
4226

    
4227
        //remaining coefficients have suffix_length > 0
4228
        for(;i<total_coeff;i++) {
4229
            static const int suffix_limit[7] = {0,5,11,23,47,95,INT_MAX };
4230
            prefix = get_level_prefix(gb);
4231
            if(prefix<15){
4232
                level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
4233
            }else{
4234
                level_code = (15<<suffix_length) + get_bits(gb, prefix-3);
4235
                if(prefix>=16)
4236
                    level_code += (1<<(prefix-3))-4096;
4237
            }
4238
            mask= -(level_code&1);
4239
            level[i]= (((2+level_code)>>1) ^ mask) - mask;
4240
            if(level_code > suffix_limit[suffix_length])
4241
                suffix_length++;
4242
        }
4243
    }
4244

    
4245
    if(total_coeff == max_coeff)
4246
        zeros_left=0;
4247
    else{
4248
        if(n == CHROMA_DC_BLOCK_INDEX)
4249
            zeros_left= get_vlc2(gb, chroma_dc_total_zeros_vlc[ total_coeff-1 ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
4250
        else
4251
            zeros_left= get_vlc2(gb, total_zeros_vlc[ total_coeff-1 ].table, TOTAL_ZEROS_VLC_BITS, 1);
4252
    }
4253

    
4254
    coeff_num = zeros_left + total_coeff - 1;
4255
    j = scantable[coeff_num];
4256
    if(n > 24){
4257
        block[j] = level[0];
4258
        for(i=1;i<total_coeff;i++) {
4259
            if(zeros_left <= 0)
4260
                run_before = 0;
4261
            else if(zeros_left < 7){
4262
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4263
            }else{
4264
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4265
            }
4266
            zeros_left -= run_before;
4267
            coeff_num -= 1 + run_before;
4268
            j= scantable[ coeff_num ];
4269

    
4270
            block[j]= level[i];
4271
        }
4272
    }else{
4273
        block[j] = (level[0] * qmul[j] + 32)>>6;
4274
        for(i=1;i<total_coeff;i++) {
4275
            if(zeros_left <= 0)
4276
                run_before = 0;
4277
            else if(zeros_left < 7){
4278
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4279
            }else{
4280
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4281
            }
4282
            zeros_left -= run_before;
4283
            coeff_num -= 1 + run_before;
4284
            j= scantable[ coeff_num ];
4285

    
4286
            block[j]= (level[i] * qmul[j] + 32)>>6;
4287
        }
4288
    }
4289

    
4290
    if(zeros_left<0){
4291
        av_log(h->s.avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y);
4292
        return -1;
4293
    }
4294

    
4295
    return 0;
4296
}
4297

    
4298
static void predict_field_decoding_flag(H264Context *h){
4299
    MpegEncContext * const s = &h->s;
4300
    const int mb_xy= h->mb_xy;
4301
    int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
4302
                ? s->current_picture.mb_type[mb_xy-1]
4303
                : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
4304
                ? s->current_picture.mb_type[mb_xy-s->mb_stride]
4305
                : 0;
4306
    h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
4307
}
4308

    
4309
/**
4310
 * decodes a P_SKIP or B_SKIP macroblock
4311
 */
4312
static void decode_mb_skip(H264Context *h){
4313
    MpegEncContext * const s = &h->s;
4314
    const int mb_xy= h->mb_xy;
4315
    int mb_type=0;
4316

    
4317
    memset(h->non_zero_count[mb_xy], 0, 16);
4318
    memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui
4319

    
4320
    if(MB_FIELD)
4321
        mb_type|= MB_TYPE_INTERLACED;
4322

    
4323
    if( h->slice_type_nos == FF_B_TYPE )
4324
    {
4325
        // just for fill_caches. pred_direct_motion will set the real mb_type
4326
        mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
4327

    
4328
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4329
        pred_direct_motion(h, &mb_type);
4330
        mb_type|= MB_TYPE_SKIP;
4331
    }
4332
    else
4333
    {
4334
        int mx, my;
4335
        mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
4336

    
4337
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4338
        pred_pskip_motion(h, &mx, &my);
4339
        fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
4340
        fill_rectangle(  h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
4341
    }
4342

    
4343
    write_back_motion(h, mb_type);
4344
    s->current_picture.mb_type[mb_xy]= mb_type;
4345
    s->current_picture.qscale_table[mb_xy]= s->qscale;
4346
    h->slice_table[ mb_xy ]= h->slice_num;
4347
    h->prev_mb_skipped= 1;
4348
}
4349

    
4350
/**
4351
 * decodes a macroblock
4352
 * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
4353
 */
4354
static int decode_mb_cavlc(H264Context *h){
4355
    MpegEncContext * const s = &h->s;
4356
    int mb_xy;
4357
    int partition_count;
4358
    unsigned int mb_type, cbp;
4359
    int dct8x8_allowed= h->pps.transform_8x8_mode;
4360

    
4361
    mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
4362

    
4363
    s->dsp.clear_blocks(h->mb); //FIXME avoid if already clear (move after skip handlong?
4364

    
4365
    tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
4366
    cbp = 0; /* avoid warning. FIXME: find a solution without slowing
4367
                down the code */
4368
    if(h->slice_type_nos != FF_I_TYPE){
4369
        if(s->mb_skip_run==-1)
4370
            s->mb_skip_run= get_ue_golomb(&s->gb);
4371

    
4372
        if (s->mb_skip_run--) {
4373
            if(FRAME_MBAFF && (s->mb_y&1) == 0){
4374
                if(s->mb_skip_run==0)
4375
                    h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
4376
                else
4377
                    predict_field_decoding_flag(h);
4378
            }
4379
            decode_mb_skip(h);
4380
            return 0;
4381
        }
4382
    }
4383
    if(FRAME_MBAFF){
4384
        if( (s->mb_y&1) == 0 )
4385
            h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
4386
    }else
4387
        h->mb_field_decoding_flag= (s->picture_structure!=PICT_FRAME);
4388

    
4389
    h->prev_mb_skipped= 0;
4390

    
4391
    mb_type= get_ue_golomb(&s->gb);
4392
    if(h->slice_type_nos == FF_B_TYPE){
4393
        if(mb_type < 23){
4394
            partition_count= b_mb_type_info[mb_type].partition_count;
4395
            mb_type=         b_mb_type_info[mb_type].type;
4396
        }else{
4397
            mb_type -= 23;
4398
            goto decode_intra_mb;
4399
        }
4400
    }else if(h->slice_type_nos == FF_P_TYPE){
4401
        if(mb_type < 5){
4402
            partition_count= p_mb_type_info[mb_type].partition_count;
4403
            mb_type=         p_mb_type_info[mb_type].type;
4404
        }else{
4405
            mb_type -= 5;
4406
            goto decode_intra_mb;
4407
        }
4408
    }else{
4409
       assert(h->slice_type_nos == FF_I_TYPE);
4410
        if(h->slice_type == FF_SI_TYPE && mb_type)
4411
            mb_type--;
4412
decode_intra_mb:
4413
        if(mb_type > 25){
4414
            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);
4415
            return -1;
4416
        }
4417
        partition_count=0;
4418
        cbp= i_mb_type_info[mb_type].cbp;
4419
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
4420
        mb_type= i_mb_type_info[mb_type].type;
4421
    }
4422

    
4423
    if(MB_FIELD)
4424
        mb_type |= MB_TYPE_INTERLACED;
4425

    
4426
    h->slice_table[ mb_xy ]= h->slice_num;
4427

    
4428
    if(IS_INTRA_PCM(mb_type)){
4429
        unsigned int x, y;
4430

    
4431
        // We assume these blocks are very rare so we do not optimize it.
4432
        align_get_bits(&s->gb);
4433

    
4434
        // The pixels are stored in the same order as levels in h->mb array.
4435
        for(y=0; y<16; y++){
4436
            const int index= 4*(y&3) + 32*((y>>2)&1) + 128*(y>>3);
4437
            for(x=0; x<16; x++){
4438
                tprintf(s->avctx, "LUMA ICPM LEVEL (%3d)\n", show_bits(&s->gb, 8));
4439
                h->mb[index + (x&3) + 16*((x>>2)&1) + 64*(x>>3)]= get_bits(&s->gb, 8);
4440
            }
4441
        }
4442
        if(CHROMA){
4443
            for(y=0; y<8; y++){
4444
                const int index= 256 + 4*(y&3) + 32*(y>>2);
4445
                for(x=0; x<8; x++){
4446
                    tprintf(s->avctx, "CHROMA U ICPM LEVEL (%3d)\n", show_bits(&s->gb, 8));
4447
                    h->mb[index + (x&3) + 16*(x>>2)]= get_bits(&s->gb, 8);
4448
                }
4449
            }
4450
            for(y=0; y<8; y++){
4451
                const int index= 256 + 64 + 4*(y&3) + 32*(y>>2);
4452
                for(x=0; x<8; x++){
4453