fc39bdb49db146e12b6806d7678d77ff226c461d
[ffmpeg.git] / libavcodec / h264.c
1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 /**
23  * @file libavcodec/h264.c
24  * H.264 / AVC / MPEG4 part10 codec.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27
28 #include "internal.h"
29 #include "dsputil.h"
30 #include "avcodec.h"
31 #include "mpegvideo.h"
32 #include "h264.h"
33 #include "h264data.h"
34 #include "h264_mvpred.h"
35 #include "h264_parser.h"
36 #include "golomb.h"
37 #include "mathops.h"
38 #include "rectangle.h"
39 #include "vdpau_internal.h"
40
41 #include "cabac.h"
42
43 //#undef NDEBUG
44 #include <assert.h>
45
46 static const uint8_t rem6[52]={
47 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,
48 };
49
50 static const uint8_t div6[52]={
51 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,
52 };
53
54 void ff_h264_write_back_intra_pred_mode(H264Context *h){
55     const int mb_xy= h->mb_xy;
56
57     h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
58     h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
59     h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
60     h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
61     h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
62     h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
63     h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
64 }
65
66 /**
67  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
68  */
69 int ff_h264_check_intra4x4_pred_mode(H264Context *h){
70     MpegEncContext * const s = &h->s;
71     static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
72     static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
73     int i;
74
75     if(!(h->top_samples_available&0x8000)){
76         for(i=0; i<4; i++){
77             int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
78             if(status<0){
79                 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);
80                 return -1;
81             } else if(status){
82                 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
83             }
84         }
85     }
86
87     if((h->left_samples_available&0x8888)!=0x8888){
88         static const int mask[4]={0x8000,0x2000,0x80,0x20};
89         for(i=0; i<4; i++){
90             if(!(h->left_samples_available&mask[i])){
91                 int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
92                 if(status<0){
93                     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);
94                     return -1;
95                 } else if(status){
96                     h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
97                 }
98             }
99         }
100     }
101
102     return 0;
103 } //FIXME cleanup like ff_h264_check_intra_pred_mode
104
105 /**
106  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
107  */
108 int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
109     MpegEncContext * const s = &h->s;
110     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
111     static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
112
113     if(mode > 6U) {
114         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);
115         return -1;
116     }
117
118     if(!(h->top_samples_available&0x8000)){
119         mode= top[ mode ];
120         if(mode<0){
121             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);
122             return -1;
123         }
124     }
125
126     if((h->left_samples_available&0x8080) != 0x8080){
127         mode= left[ mode ];
128         if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
129             mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
130         }
131         if(mode<0){
132             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);
133             return -1;
134         }
135     }
136
137     return mode;
138 }
139
140 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
141     int i, si, di;
142     uint8_t *dst;
143     int bufidx;
144
145 //    src[0]&0x80;                //forbidden bit
146     h->nal_ref_idc= src[0]>>5;
147     h->nal_unit_type= src[0]&0x1F;
148
149     src++; length--;
150 #if 0
151     for(i=0; i<length; i++)
152         printf("%2X ", src[i]);
153 #endif
154
155 #if HAVE_FAST_UNALIGNED
156 # if HAVE_FAST_64BIT
157 #   define RS 7
158     for(i=0; i+1<length; i+=9){
159         if(!((~AV_RN64A(src+i) & (AV_RN64A(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
160 # else
161 #   define RS 3
162     for(i=0; i+1<length; i+=5){
163         if(!((~AV_RN32A(src+i) & (AV_RN32A(src+i) - 0x01000101U)) & 0x80008080U))
164 # endif
165             continue;
166         if(i>0 && !src[i]) i--;
167         while(src[i]) i++;
168 #else
169 #   define RS 0
170     for(i=0; i+1<length; i+=2){
171         if(src[i]) continue;
172         if(i>0 && src[i-1]==0) i--;
173 #endif
174         if(i+2<length && src[i+1]==0 && src[i+2]<=3){
175             if(src[i+2]!=3){
176                 /* startcode, so we must be past the end */
177                 length=i;
178             }
179             break;
180         }
181         i-= RS;
182     }
183
184     if(i>=length-1){ //no escaped 0
185         *dst_length= length;
186         *consumed= length+1; //+1 for the header
187         return src;
188     }
189
190     bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
191     av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
192     dst= h->rbsp_buffer[bufidx];
193
194     if (dst == NULL){
195         return NULL;
196     }
197
198 //printf("decoding esc\n");
199     memcpy(dst, src, i);
200     si=di=i;
201     while(si+2<length){
202         //remove escapes (very rare 1:2^22)
203         if(src[si+2]>3){
204             dst[di++]= src[si++];
205             dst[di++]= src[si++];
206         }else if(src[si]==0 && src[si+1]==0){
207             if(src[si+2]==3){ //escape
208                 dst[di++]= 0;
209                 dst[di++]= 0;
210                 si+=3;
211                 continue;
212             }else //next start code
213                 goto nsc;
214         }
215
216         dst[di++]= src[si++];
217     }
218     while(si<length)
219         dst[di++]= src[si++];
220 nsc:
221
222     memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
223
224     *dst_length= di;
225     *consumed= si + 1;//+1 for the header
226 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
227     return dst;
228 }
229
230 int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
231     int v= *src;
232     int r;
233
234     tprintf(h->s.avctx, "rbsp trailing %X\n", v);
235
236     for(r=1; r<9; r++){
237         if(v&1) return r;
238         v>>=1;
239     }
240     return 0;
241 }
242
243 /**
244  * IDCT transforms the 16 dc values and dequantizes them.
245  * @param qp quantization parameter
246  */
247 static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
248 #define stride 16
249     int i;
250     int temp[16]; //FIXME check if this is a good idea
251     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
252     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
253
254 //memset(block, 64, 2*256);
255 //return;
256     for(i=0; i<4; i++){
257         const int offset= y_offset[i];
258         const int z0= block[offset+stride*0] + block[offset+stride*4];
259         const int z1= block[offset+stride*0] - block[offset+stride*4];
260         const int z2= block[offset+stride*1] - block[offset+stride*5];
261         const int z3= block[offset+stride*1] + block[offset+stride*5];
262
263         temp[4*i+0]= z0+z3;
264         temp[4*i+1]= z1+z2;
265         temp[4*i+2]= z1-z2;
266         temp[4*i+3]= z0-z3;
267     }
268
269     for(i=0; i<4; i++){
270         const int offset= x_offset[i];
271         const int z0= temp[4*0+i] + temp[4*2+i];
272         const int z1= temp[4*0+i] - temp[4*2+i];
273         const int z2= temp[4*1+i] - temp[4*3+i];
274         const int z3= temp[4*1+i] + temp[4*3+i];
275
276         block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
277         block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
278         block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
279         block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
280     }
281 }
282
283 #if 0
284 /**
285  * DCT transforms the 16 dc values.
286  * @param qp quantization parameter ??? FIXME
287  */
288 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
289 //    const int qmul= dequant_coeff[qp][0];
290     int i;
291     int temp[16]; //FIXME check if this is a good idea
292     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
293     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
294
295     for(i=0; i<4; i++){
296         const int offset= y_offset[i];
297         const int z0= block[offset+stride*0] + block[offset+stride*4];
298         const int z1= block[offset+stride*0] - block[offset+stride*4];
299         const int z2= block[offset+stride*1] - block[offset+stride*5];
300         const int z3= block[offset+stride*1] + block[offset+stride*5];
301
302         temp[4*i+0]= z0+z3;
303         temp[4*i+1]= z1+z2;
304         temp[4*i+2]= z1-z2;
305         temp[4*i+3]= z0-z3;
306     }
307
308     for(i=0; i<4; i++){
309         const int offset= x_offset[i];
310         const int z0= temp[4*0+i] + temp[4*2+i];
311         const int z1= temp[4*0+i] - temp[4*2+i];
312         const int z2= temp[4*1+i] - temp[4*3+i];
313         const int z3= temp[4*1+i] + temp[4*3+i];
314
315         block[stride*0 +offset]= (z0 + z3)>>1;
316         block[stride*2 +offset]= (z1 + z2)>>1;
317         block[stride*8 +offset]= (z1 - z2)>>1;
318         block[stride*10+offset]= (z0 - z3)>>1;
319     }
320 }
321 #endif
322
323 #undef xStride
324 #undef stride
325
326 static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
327     const int stride= 16*2;
328     const int xStride= 16;
329     int a,b,c,d,e;
330
331     a= block[stride*0 + xStride*0];
332     b= block[stride*0 + xStride*1];
333     c= block[stride*1 + xStride*0];
334     d= block[stride*1 + xStride*1];
335
336     e= a-b;
337     a= a+b;
338     b= c-d;
339     c= c+d;
340
341     block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
342     block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
343     block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
344     block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
345 }
346
347 #if 0
348 static void chroma_dc_dct_c(DCTELEM *block){
349     const int stride= 16*2;
350     const int xStride= 16;
351     int a,b,c,d,e;
352
353     a= block[stride*0 + xStride*0];
354     b= block[stride*0 + xStride*1];
355     c= block[stride*1 + xStride*0];
356     d= block[stride*1 + xStride*1];
357
358     e= a-b;
359     a= a+b;
360     b= c-d;
361     c= c+d;
362
363     block[stride*0 + xStride*0]= (a+c);
364     block[stride*0 + xStride*1]= (e+b);
365     block[stride*1 + xStride*0]= (a-c);
366     block[stride*1 + xStride*1]= (e-b);
367 }
368 #endif
369
370 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
371                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
372                            int src_x_offset, int src_y_offset,
373                            qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
374     MpegEncContext * const s = &h->s;
375     const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
376     int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
377     const int luma_xy= (mx&3) + ((my&3)<<2);
378     uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
379     uint8_t * src_cb, * src_cr;
380     int extra_width= h->emu_edge_width;
381     int extra_height= h->emu_edge_height;
382     int emu=0;
383     const int full_mx= mx>>2;
384     const int full_my= my>>2;
385     const int pic_width  = 16*s->mb_width;
386     const int pic_height = 16*s->mb_height >> MB_FIELD;
387
388     if(mx&7) extra_width -= 3;
389     if(my&7) extra_height -= 3;
390
391     if(   full_mx < 0-extra_width
392        || full_my < 0-extra_height
393        || full_mx + 16/*FIXME*/ > pic_width + extra_width
394        || full_my + 16/*FIXME*/ > pic_height + extra_height){
395         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);
396             src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
397         emu=1;
398     }
399
400     qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
401     if(!square){
402         qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
403     }
404
405     if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
406
407     if(MB_FIELD){
408         // chroma offset when predicting from a field of opposite parity
409         my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
410         emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
411     }
412     src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
413     src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
414
415     if(emu){
416         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);
417             src_cb= s->edge_emu_buffer;
418     }
419     chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
420
421     if(emu){
422         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);
423             src_cr= s->edge_emu_buffer;
424     }
425     chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
426 }
427
428 static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
429                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
430                            int x_offset, int y_offset,
431                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
432                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
433                            int list0, int list1){
434     MpegEncContext * const s = &h->s;
435     qpel_mc_func *qpix_op=  qpix_put;
436     h264_chroma_mc_func chroma_op= chroma_put;
437
438     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
439     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
440     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
441     x_offset += 8*s->mb_x;
442     y_offset += 8*(s->mb_y >> MB_FIELD);
443
444     if(list0){
445         Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
446         mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
447                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
448                            qpix_op, chroma_op);
449
450         qpix_op=  qpix_avg;
451         chroma_op= chroma_avg;
452     }
453
454     if(list1){
455         Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
456         mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
457                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
458                            qpix_op, chroma_op);
459     }
460 }
461
462 static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
463                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
464                            int x_offset, int y_offset,
465                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
466                            h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
467                            h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
468                            int list0, int list1){
469     MpegEncContext * const s = &h->s;
470
471     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
472     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
473     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
474     x_offset += 8*s->mb_x;
475     y_offset += 8*(s->mb_y >> MB_FIELD);
476
477     if(list0 && list1){
478         /* don't optimize for luma-only case, since B-frames usually
479          * use implicit weights => chroma too. */
480         uint8_t *tmp_cb = s->obmc_scratchpad;
481         uint8_t *tmp_cr = s->obmc_scratchpad + 8;
482         uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
483         int refn0 = h->ref_cache[0][ scan8[n] ];
484         int refn1 = h->ref_cache[1][ scan8[n] ];
485
486         mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
487                     dest_y, dest_cb, dest_cr,
488                     x_offset, y_offset, qpix_put, chroma_put);
489         mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
490                     tmp_y, tmp_cb, tmp_cr,
491                     x_offset, y_offset, qpix_put, chroma_put);
492
493         if(h->use_weight == 2){
494             int weight0 = h->implicit_weight[refn0][refn1];
495             int weight1 = 64 - weight0;
496             luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
497             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
498             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
499         }else{
500             luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
501                             h->luma_weight[0][refn0], h->luma_weight[1][refn1],
502                             h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
503             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
504                             h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
505                             h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
506             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
507                             h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
508                             h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
509         }
510     }else{
511         int list = list1 ? 1 : 0;
512         int refn = h->ref_cache[list][ scan8[n] ];
513         Picture *ref= &h->ref_list[list][refn];
514         mc_dir_part(h, ref, n, square, chroma_height, delta, list,
515                     dest_y, dest_cb, dest_cr, x_offset, y_offset,
516                     qpix_put, chroma_put);
517
518         luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
519                        h->luma_weight[list][refn], h->luma_offset[list][refn]);
520         if(h->use_weight_chroma){
521             chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
522                              h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
523             chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
524                              h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
525         }
526     }
527 }
528
529 static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
530                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
531                            int x_offset, int y_offset,
532                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
533                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
534                            h264_weight_func *weight_op, h264_biweight_func *weight_avg,
535                            int list0, int list1){
536     if((h->use_weight==2 && list0 && list1
537         && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
538        || h->use_weight==1)
539         mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
540                          x_offset, y_offset, qpix_put, chroma_put,
541                          weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
542     else
543         mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
544                     x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
545 }
546
547 static inline void prefetch_motion(H264Context *h, int list){
548     /* fetch pixels for estimated mv 4 macroblocks ahead
549      * optimized for 64byte cache lines */
550     MpegEncContext * const s = &h->s;
551     const int refn = h->ref_cache[list][scan8[0]];
552     if(refn >= 0){
553         const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
554         const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
555         uint8_t **src= h->ref_list[list][refn].data;
556         int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
557         s->dsp.prefetch(src[0]+off, s->linesize, 4);
558         off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
559         s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
560     }
561 }
562
563 static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
564                       qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
565                       qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
566                       h264_weight_func *weight_op, h264_biweight_func *weight_avg){
567     MpegEncContext * const s = &h->s;
568     const int mb_xy= h->mb_xy;
569     const int mb_type= s->current_picture.mb_type[mb_xy];
570
571     assert(IS_INTER(mb_type));
572
573     prefetch_motion(h, 0);
574
575     if(IS_16X16(mb_type)){
576         mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
577                 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
578                 weight_op, weight_avg,
579                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
580     }else if(IS_16X8(mb_type)){
581         mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
582                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
583                 &weight_op[1], &weight_avg[1],
584                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
585         mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
586                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
587                 &weight_op[1], &weight_avg[1],
588                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
589     }else if(IS_8X16(mb_type)){
590         mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
591                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
592                 &weight_op[2], &weight_avg[2],
593                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
594         mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
595                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
596                 &weight_op[2], &weight_avg[2],
597                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
598     }else{
599         int i;
600
601         assert(IS_8X8(mb_type));
602
603         for(i=0; i<4; i++){
604             const int sub_mb_type= h->sub_mb_type[i];
605             const int n= 4*i;
606             int x_offset= (i&1)<<2;
607             int y_offset= (i&2)<<1;
608
609             if(IS_SUB_8X8(sub_mb_type)){
610                 mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
611                     qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
612                     &weight_op[3], &weight_avg[3],
613                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
614             }else if(IS_SUB_8X4(sub_mb_type)){
615                 mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
616                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
617                     &weight_op[4], &weight_avg[4],
618                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
619                 mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
620                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
621                     &weight_op[4], &weight_avg[4],
622                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
623             }else if(IS_SUB_4X8(sub_mb_type)){
624                 mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
625                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
626                     &weight_op[5], &weight_avg[5],
627                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
628                 mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
629                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
630                     &weight_op[5], &weight_avg[5],
631                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
632             }else{
633                 int j;
634                 assert(IS_SUB_4X4(sub_mb_type));
635                 for(j=0; j<4; j++){
636                     int sub_x_offset= x_offset + 2*(j&1);
637                     int sub_y_offset= y_offset +   (j&2);
638                     mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
639                         qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
640                         &weight_op[6], &weight_avg[6],
641                         IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
642                 }
643             }
644         }
645     }
646
647     prefetch_motion(h, 1);
648 }
649
650
651 static void free_tables(H264Context *h){
652     int i;
653     H264Context *hx;
654     av_freep(&h->intra4x4_pred_mode);
655     av_freep(&h->chroma_pred_mode_table);
656     av_freep(&h->cbp_table);
657     av_freep(&h->mvd_table[0]);
658     av_freep(&h->mvd_table[1]);
659     av_freep(&h->direct_table);
660     av_freep(&h->non_zero_count);
661     av_freep(&h->slice_table_base);
662     h->slice_table= NULL;
663     av_freep(&h->list_counts);
664
665     av_freep(&h->mb2b_xy);
666     av_freep(&h->mb2br_xy);
667     av_freep(&h->mb2b8_xy);
668
669     for(i = 0; i < MAX_THREADS; i++) {
670         hx = h->thread_context[i];
671         if(!hx) continue;
672         av_freep(&hx->top_borders[1]);
673         av_freep(&hx->top_borders[0]);
674         av_freep(&hx->s.obmc_scratchpad);
675         av_freep(&hx->rbsp_buffer[1]);
676         av_freep(&hx->rbsp_buffer[0]);
677         hx->rbsp_buffer_size[0] = 0;
678         hx->rbsp_buffer_size[1] = 0;
679         if (i) av_freep(&h->thread_context[i]);
680     }
681 }
682
683 static void init_dequant8_coeff_table(H264Context *h){
684     int i,q,x;
685     const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
686     h->dequant8_coeff[0] = h->dequant8_buffer[0];
687     h->dequant8_coeff[1] = h->dequant8_buffer[1];
688
689     for(i=0; i<2; i++ ){
690         if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
691             h->dequant8_coeff[1] = h->dequant8_buffer[0];
692             break;
693         }
694
695         for(q=0; q<52; q++){
696             int shift = div6[q];
697             int idx = rem6[q];
698             for(x=0; x<64; x++)
699                 h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
700                     ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
701                     h->pps.scaling_matrix8[i][x]) << shift;
702         }
703     }
704 }
705
706 static void init_dequant4_coeff_table(H264Context *h){
707     int i,j,q,x;
708     const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
709     for(i=0; i<6; i++ ){
710         h->dequant4_coeff[i] = h->dequant4_buffer[i];
711         for(j=0; j<i; j++){
712             if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
713                 h->dequant4_coeff[i] = h->dequant4_buffer[j];
714                 break;
715             }
716         }
717         if(j<i)
718             continue;
719
720         for(q=0; q<52; q++){
721             int shift = div6[q] + 2;
722             int idx = rem6[q];
723             for(x=0; x<16; x++)
724                 h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
725                     ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
726                     h->pps.scaling_matrix4[i][x]) << shift;
727         }
728     }
729 }
730
731 static void init_dequant_tables(H264Context *h){
732     int i,x;
733     init_dequant4_coeff_table(h);
734     if(h->pps.transform_8x8_mode)
735         init_dequant8_coeff_table(h);
736     if(h->sps.transform_bypass){
737         for(i=0; i<6; i++)
738             for(x=0; x<16; x++)
739                 h->dequant4_coeff[i][0][x] = 1<<6;
740         if(h->pps.transform_8x8_mode)
741             for(i=0; i<2; i++)
742                 for(x=0; x<64; x++)
743                     h->dequant8_coeff[i][0][x] = 1<<6;
744     }
745 }
746
747
748 int ff_h264_alloc_tables(H264Context *h){
749     MpegEncContext * const s = &h->s;
750     const int big_mb_num= s->mb_stride * (s->mb_height+1);
751     int x,y;
752
753     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, big_mb_num * 8  * sizeof(uint8_t), fail)
754
755     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 32 * sizeof(uint8_t), fail)
756     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
757     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
758
759     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
760     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*big_mb_num * sizeof(uint8_t), fail);
761     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*big_mb_num * sizeof(uint8_t), fail);
762     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 32*big_mb_num * sizeof(uint8_t) , fail);
763     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
764
765     memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
766     h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
767
768     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
769     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
770     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b8_xy , big_mb_num * sizeof(uint32_t), fail);
771     for(y=0; y<s->mb_height; y++){
772         for(x=0; x<s->mb_width; x++){
773             const int mb_xy= x + y*s->mb_stride;
774             const int b_xy = 4*x + 4*y*h->b_stride;
775             const int b8_xy= 2*x + 2*y*h->b8_stride;
776
777             h->mb2b_xy [mb_xy]= b_xy;
778             h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
779             h->mb2b8_xy[mb_xy]= b8_xy;
780         }
781     }
782
783     s->obmc_scratchpad = NULL;
784
785     if(!h->dequant4_coeff[0])
786         init_dequant_tables(h);
787
788     return 0;
789 fail:
790     free_tables(h);
791     return -1;
792 }
793
794 /**
795  * Mimic alloc_tables(), but for every context thread.
796  */
797 static void clone_tables(H264Context *dst, H264Context *src){
798     dst->intra4x4_pred_mode       = src->intra4x4_pred_mode;
799     dst->non_zero_count           = src->non_zero_count;
800     dst->slice_table              = src->slice_table;
801     dst->cbp_table                = src->cbp_table;
802     dst->mb2b_xy                  = src->mb2b_xy;
803     dst->mb2br_xy                 = src->mb2br_xy;
804     dst->mb2b8_xy                 = src->mb2b8_xy;
805     dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
806     dst->mvd_table[0]             = src->mvd_table[0];
807     dst->mvd_table[1]             = src->mvd_table[1];
808     dst->direct_table             = src->direct_table;
809     dst->list_counts              = src->list_counts;
810
811     dst->s.obmc_scratchpad = NULL;
812     ff_h264_pred_init(&dst->hpc, src->s.codec_id);
813 }
814
815 /**
816  * Init context
817  * Allocate buffers which are not shared amongst multiple threads.
818  */
819 static int context_init(H264Context *h){
820     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
821     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
822
823     return 0;
824 fail:
825     return -1; // free_tables will clean up for us
826 }
827
828 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
829
830 static av_cold void common_init(H264Context *h){
831     MpegEncContext * const s = &h->s;
832
833     s->width = s->avctx->width;
834     s->height = s->avctx->height;
835     s->codec_id= s->avctx->codec->id;
836
837     ff_h264_pred_init(&h->hpc, s->codec_id);
838
839     h->dequant_coeff_pps= -1;
840     s->unrestricted_mv=1;
841     s->decode=1; //FIXME
842
843     dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
844
845     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
846     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
847 }
848
849 av_cold int ff_h264_decode_init(AVCodecContext *avctx){
850     H264Context *h= avctx->priv_data;
851     MpegEncContext * const s = &h->s;
852
853     MPV_decode_defaults(s);
854
855     s->avctx = avctx;
856     common_init(h);
857
858     s->out_format = FMT_H264;
859     s->workaround_bugs= avctx->workaround_bugs;
860
861     // set defaults
862 //    s->decode_mb= ff_h263_decode_mb;
863     s->quarter_sample = 1;
864     if(!avctx->has_b_frames)
865     s->low_delay= 1;
866
867     avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
868
869     ff_h264_decode_init_vlc();
870
871     h->thread_context[0] = h;
872     h->outputed_poc = INT_MIN;
873     h->prev_poc_msb= 1<<16;
874     h->x264_build = -1;
875     ff_h264_reset_sei(h);
876     if(avctx->codec_id == CODEC_ID_H264){
877         if(avctx->ticks_per_frame == 1){
878             s->avctx->time_base.den *=2;
879         }
880         avctx->ticks_per_frame = 2;
881     }
882
883     if(avctx->extradata_size > 0 && avctx->extradata && *(char *)avctx->extradata == 1){
884         int i, cnt, nalsize;
885         unsigned char *p = avctx->extradata;
886
887         h->is_avc = 1;
888
889         if(avctx->extradata_size < 7) {
890             av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
891             return -1;
892         }
893         /* sps and pps in the avcC always have length coded with 2 bytes,
894            so put a fake nal_length_size = 2 while parsing them */
895         h->nal_length_size = 2;
896         // Decode sps from avcC
897         cnt = *(p+5) & 0x1f; // Number of sps
898         p += 6;
899         for (i = 0; i < cnt; i++) {
900             nalsize = AV_RB16(p) + 2;
901             if(decode_nal_units(h, p, nalsize) < 0) {
902                 av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
903                 return -1;
904             }
905             p += nalsize;
906         }
907         // Decode pps from avcC
908         cnt = *(p++); // Number of pps
909         for (i = 0; i < cnt; i++) {
910             nalsize = AV_RB16(p) + 2;
911             if(decode_nal_units(h, p, nalsize)  != nalsize) {
912                 av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
913                 return -1;
914             }
915             p += nalsize;
916         }
917         // Now store right nal length size, that will be use to parse all other nals
918         h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
919     } else {
920         h->is_avc = 0;
921         if(decode_nal_units(h, s->avctx->extradata, s->avctx->extradata_size) < 0)
922             return -1;
923     }
924     if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
925         s->avctx->has_b_frames = h->sps.num_reorder_frames;
926         s->low_delay = 0;
927     }
928
929     return 0;
930 }
931
932 int ff_h264_frame_start(H264Context *h){
933     MpegEncContext * const s = &h->s;
934     int i;
935
936     if(MPV_frame_start(s, s->avctx) < 0)
937         return -1;
938     ff_er_frame_start(s);
939     /*
940      * MPV_frame_start uses pict_type to derive key_frame.
941      * This is incorrect for H.264; IDR markings must be used.
942      * Zero here; IDR markings per slice in frame or fields are ORed in later.
943      * See decode_nal_units().
944      */
945     s->current_picture_ptr->key_frame= 0;
946     s->current_picture_ptr->mmco_reset= 0;
947
948     assert(s->linesize && s->uvlinesize);
949
950     for(i=0; i<16; i++){
951         h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
952         h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
953     }
954     for(i=0; i<4; i++){
955         h->block_offset[16+i]=
956         h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
957         h->block_offset[24+16+i]=
958         h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
959     }
960
961     /* can't be in alloc_tables because linesize isn't known there.
962      * FIXME: redo bipred weight to not require extra buffer? */
963     for(i = 0; i < s->avctx->thread_count; i++)
964         if(!h->thread_context[i]->s.obmc_scratchpad)
965             h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
966
967     /* some macroblocks will be accessed before they're available */
968     if(FRAME_MBAFF || s->avctx->thread_count > 1)
969         memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
970
971 //    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
972
973     // We mark the current picture as non-reference after allocating it, so
974     // that if we break out due to an error it can be released automatically
975     // in the next MPV_frame_start().
976     // SVQ3 as well as most other codecs have only last/next/current and thus
977     // get released even with set reference, besides SVQ3 and others do not
978     // mark frames as reference later "naturally".
979     if(s->codec_id != CODEC_ID_SVQ3)
980         s->current_picture_ptr->reference= 0;
981
982     s->current_picture_ptr->field_poc[0]=
983     s->current_picture_ptr->field_poc[1]= INT_MAX;
984     assert(s->current_picture_ptr->long_ref==0);
985
986     return 0;
987 }
988
989 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){
990     MpegEncContext * const s = &h->s;
991     uint8_t *top_border;
992     int top_idx = 1;
993
994     src_y  -=   linesize;
995     src_cb -= uvlinesize;
996     src_cr -= uvlinesize;
997
998     if(!simple && FRAME_MBAFF){
999         if(s->mb_y&1){
1000             if(!MB_MBAFF){
1001                 top_border = h->top_borders[0][s->mb_x];
1002                 AV_COPY128(top_border, src_y + 15*linesize);
1003                 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1004                     AV_COPY64(top_border+16, src_cb+7*uvlinesize);
1005                     AV_COPY64(top_border+24, src_cr+7*uvlinesize);
1006                 }
1007             }
1008         }else if(MB_MBAFF){
1009             top_idx = 0;
1010         }else
1011             return;
1012     }
1013
1014     top_border = h->top_borders[top_idx][s->mb_x];
1015     // There are two lines saved, the line above the the top macroblock of a pair,
1016     // and the line above the bottom macroblock
1017     AV_COPY128(top_border, src_y + 16*linesize);
1018
1019     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1020         AV_COPY64(top_border+16, src_cb+8*uvlinesize);
1021         AV_COPY64(top_border+24, src_cr+8*uvlinesize);
1022     }
1023 }
1024
1025 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){
1026     MpegEncContext * const s = &h->s;
1027     int deblock_left;
1028     int deblock_top;
1029     int top_idx = 1;
1030     uint8_t *top_border_m1;
1031     uint8_t *top_border;
1032
1033     if(!simple && FRAME_MBAFF){
1034         if(s->mb_y&1){
1035             if(!MB_MBAFF)
1036                 return;
1037         }else{
1038             top_idx = MB_MBAFF ? 0 : 1;
1039         }
1040     }
1041
1042     if(h->deblocking_filter == 2) {
1043         deblock_left = h->left_type[0];
1044         deblock_top  = h->top_type;
1045     } else {
1046         deblock_left = (s->mb_x > 0);
1047         deblock_top =  (s->mb_y > !!MB_FIELD);
1048     }
1049
1050     src_y  -=   linesize + 1;
1051     src_cb -= uvlinesize + 1;
1052     src_cr -= uvlinesize + 1;
1053
1054     top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1055     top_border    = h->top_borders[top_idx][s->mb_x];
1056
1057 #define XCHG(a,b,xchg)\
1058 if (xchg) AV_SWAP64(b,a);\
1059 else      AV_COPY64(b,a);
1060
1061     if(deblock_top){
1062         if(deblock_left){
1063             XCHG(top_border_m1+8, src_y -7, 1);
1064         }
1065         XCHG(top_border+0, src_y +1, xchg);
1066         XCHG(top_border+8, src_y +9, 1);
1067         if(s->mb_x+1 < s->mb_width){
1068             XCHG(h->top_borders[top_idx][s->mb_x+1], src_y +17, 1);
1069         }
1070     }
1071
1072     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1073         if(deblock_top){
1074             if(deblock_left){
1075                 XCHG(top_border_m1+16, src_cb -7, 1);
1076                 XCHG(top_border_m1+24, src_cr -7, 1);
1077             }
1078             XCHG(top_border+16, src_cb+1, 1);
1079             XCHG(top_border+24, src_cr+1, 1);
1080         }
1081     }
1082 }
1083
1084 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
1085     MpegEncContext * const s = &h->s;
1086     const int mb_x= s->mb_x;
1087     const int mb_y= s->mb_y;
1088     const int mb_xy= h->mb_xy;
1089     const int mb_type= s->current_picture.mb_type[mb_xy];
1090     uint8_t  *dest_y, *dest_cb, *dest_cr;
1091     int linesize, uvlinesize /*dct_offset*/;
1092     int i;
1093     int *block_offset = &h->block_offset[0];
1094     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1095     /* is_h264 should always be true if SVQ3 is disabled. */
1096     const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1097     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1098     void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1099
1100     dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
1101     dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
1102     dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
1103
1104     s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
1105     s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
1106
1107     h->list_counts[mb_xy]= h->list_count;
1108
1109     if (!simple && MB_FIELD) {
1110         linesize   = h->mb_linesize   = s->linesize * 2;
1111         uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1112         block_offset = &h->block_offset[24];
1113         if(mb_y&1){ //FIXME move out of this function?
1114             dest_y -= s->linesize*15;
1115             dest_cb-= s->uvlinesize*7;
1116             dest_cr-= s->uvlinesize*7;
1117         }
1118         if(FRAME_MBAFF) {
1119             int list;
1120             for(list=0; list<h->list_count; list++){
1121                 if(!USES_LIST(mb_type, list))
1122                     continue;
1123                 if(IS_16X16(mb_type)){
1124                     int8_t *ref = &h->ref_cache[list][scan8[0]];
1125                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1126                 }else{
1127                     for(i=0; i<16; i+=4){
1128                         int ref = h->ref_cache[list][scan8[i]];
1129                         if(ref >= 0)
1130                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1131                     }
1132                 }
1133             }
1134         }
1135     } else {
1136         linesize   = h->mb_linesize   = s->linesize;
1137         uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1138 //        dct_offset = s->linesize * 16;
1139     }
1140
1141     if (!simple && IS_INTRA_PCM(mb_type)) {
1142         for (i=0; i<16; i++) {
1143             memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1144         }
1145         for (i=0; i<8; i++) {
1146             memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
1147             memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
1148         }
1149     } else {
1150         if(IS_INTRA(mb_type)){
1151             if(h->deblocking_filter)
1152                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
1153
1154             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1155                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1156                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1157             }
1158
1159             if(IS_INTRA4x4(mb_type)){
1160                 if(simple || !s->encoding){
1161                     if(IS_8x8DCT(mb_type)){
1162                         if(transform_bypass){
1163                             idct_dc_add =
1164                             idct_add    = s->dsp.add_pixels8;
1165                         }else{
1166                             idct_dc_add = s->dsp.h264_idct8_dc_add;
1167                             idct_add    = s->dsp.h264_idct8_add;
1168                         }
1169                         for(i=0; i<16; i+=4){
1170                             uint8_t * const ptr= dest_y + block_offset[i];
1171                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1172                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1173                                 h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
1174                             }else{
1175                                 const int nnz = h->non_zero_count_cache[ scan8[i] ];
1176                                 h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1177                                                             (h->topright_samples_available<<i)&0x4000, linesize);
1178                                 if(nnz){
1179                                     if(nnz == 1 && h->mb[i*16])
1180                                         idct_dc_add(ptr, h->mb + i*16, linesize);
1181                                     else
1182                                         idct_add   (ptr, h->mb + i*16, linesize);
1183                                 }
1184                             }
1185                         }
1186                     }else{
1187                         if(transform_bypass){
1188                             idct_dc_add =
1189                             idct_add    = s->dsp.add_pixels4;
1190                         }else{
1191                             idct_dc_add = s->dsp.h264_idct_dc_add;
1192                             idct_add    = s->dsp.h264_idct_add;
1193                         }
1194                         for(i=0; i<16; i++){
1195                             uint8_t * const ptr= dest_y + block_offset[i];
1196                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1197
1198                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1199                                 h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
1200                             }else{
1201                                 uint8_t *topright;
1202                                 int nnz, tr;
1203                                 if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1204                                     const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1205                                     assert(mb_y || linesize <= block_offset[i]);
1206                                     if(!topright_avail){
1207                                         tr= ptr[3 - linesize]*0x01010101;
1208                                         topright= (uint8_t*) &tr;
1209                                     }else
1210                                         topright= ptr + 4 - linesize;
1211                                 }else
1212                                     topright= NULL;
1213
1214                                 h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1215                                 nnz = h->non_zero_count_cache[ scan8[i] ];
1216                                 if(nnz){
1217                                     if(is_h264){
1218                                         if(nnz == 1 && h->mb[i*16])
1219                                             idct_dc_add(ptr, h->mb + i*16, linesize);
1220                                         else
1221                                             idct_add   (ptr, h->mb + i*16, linesize);
1222                                     }else
1223                                         ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
1224                                 }
1225                             }
1226                         }
1227                     }
1228                 }
1229             }else{
1230                 h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1231                 if(is_h264){
1232                     if(!transform_bypass)
1233                         h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
1234                 }else
1235                     ff_svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
1236             }
1237             if(h->deblocking_filter)
1238                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
1239         }else if(is_h264){
1240             hl_motion(h, dest_y, dest_cb, dest_cr,
1241                       s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1242                       s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1243                       s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
1244         }
1245
1246
1247         if(!IS_INTRA4x4(mb_type)){
1248             if(is_h264){
1249                 if(IS_INTRA16x16(mb_type)){
1250                     if(transform_bypass){
1251                         if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1252                             h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
1253                         }else{
1254                             for(i=0; i<16; i++){
1255                                 if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1256                                     s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
1257                             }
1258                         }
1259                     }else{
1260                          s->dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1261                     }
1262                 }else if(h->cbp&15){
1263                     if(transform_bypass){
1264                         const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1265                         idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1266                         for(i=0; i<16; i+=di){
1267                             if(h->non_zero_count_cache[ scan8[i] ]){
1268                                 idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
1269                             }
1270                         }
1271                     }else{
1272                         if(IS_8x8DCT(mb_type)){
1273                             s->dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1274                         }else{
1275                             s->dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1276                         }
1277                     }
1278                 }
1279             }else{
1280                 for(i=0; i<16; i++){
1281                     if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
1282                         uint8_t * const ptr= dest_y + block_offset[i];
1283                         ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1284                     }
1285                 }
1286             }
1287         }
1288
1289         if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1290             uint8_t *dest[2] = {dest_cb, dest_cr};
1291             if(transform_bypass){
1292                 if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1293                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
1294                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
1295                 }else{
1296                     idct_add = s->dsp.add_pixels4;
1297                     for(i=16; i<16+8; i++){
1298                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1299                             idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1300                     }
1301                 }
1302             }else{
1303                 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]);
1304                 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]);
1305                 if(is_h264){
1306                     idct_add = s->dsp.h264_idct_add;
1307                     idct_dc_add = s->dsp.h264_idct_dc_add;
1308                     for(i=16; i<16+8; i++){
1309                         if(h->non_zero_count_cache[ scan8[i] ])
1310                             idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1311                         else if(h->mb[i*16])
1312                             idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1313                     }
1314                 }else{
1315                     for(i=16; i<16+8; i++){
1316                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1317                             uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
1318                             ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[s->qscale + 12] - 12, 2);
1319                         }
1320                     }
1321                 }
1322             }
1323         }
1324     }
1325     if(h->cbp || IS_INTRA(mb_type))
1326         s->dsp.clear_blocks(h->mb);
1327 }
1328
1329 /**
1330  * Process a macroblock; this case avoids checks for expensive uncommon cases.
1331  */
1332 static void hl_decode_mb_simple(H264Context *h){
1333     hl_decode_mb_internal(h, 1);
1334 }
1335
1336 /**
1337  * Process a macroblock; this handles edge cases, such as interlacing.
1338  */
1339 static void av_noinline hl_decode_mb_complex(H264Context *h){
1340     hl_decode_mb_internal(h, 0);
1341 }
1342
1343 void ff_h264_hl_decode_mb(H264Context *h){
1344     MpegEncContext * const s = &h->s;
1345     const int mb_xy= h->mb_xy;
1346     const int mb_type= s->current_picture.mb_type[mb_xy];
1347     int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
1348
1349     if (is_complex)
1350         hl_decode_mb_complex(h);
1351     else hl_decode_mb_simple(h);
1352 }
1353
1354 static int pred_weight_table(H264Context *h){
1355     MpegEncContext * const s = &h->s;
1356     int list, i;
1357     int luma_def, chroma_def;
1358
1359     h->use_weight= 0;
1360     h->use_weight_chroma= 0;
1361     h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
1362     h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
1363     luma_def = 1<<h->luma_log2_weight_denom;
1364     chroma_def = 1<<h->chroma_log2_weight_denom;
1365
1366     for(list=0; list<2; list++){
1367         h->luma_weight_flag[list]   = 0;
1368         h->chroma_weight_flag[list] = 0;
1369         for(i=0; i<h->ref_count[list]; i++){
1370             int luma_weight_flag, chroma_weight_flag;
1371
1372             luma_weight_flag= get_bits1(&s->gb);
1373             if(luma_weight_flag){
1374                 h->luma_weight[list][i]= get_se_golomb(&s->gb);
1375                 h->luma_offset[list][i]= get_se_golomb(&s->gb);
1376                 if(   h->luma_weight[list][i] != luma_def
1377                    || h->luma_offset[list][i] != 0) {
1378                     h->use_weight= 1;
1379                     h->luma_weight_flag[list]= 1;
1380                 }
1381             }else{
1382                 h->luma_weight[list][i]= luma_def;
1383                 h->luma_offset[list][i]= 0;
1384             }
1385
1386             if(CHROMA){
1387                 chroma_weight_flag= get_bits1(&s->gb);
1388                 if(chroma_weight_flag){
1389                     int j;
1390                     for(j=0; j<2; j++){
1391                         h->chroma_weight[list][i][j]= get_se_golomb(&s->gb);
1392                         h->chroma_offset[list][i][j]= get_se_golomb(&s->gb);
1393                         if(   h->chroma_weight[list][i][j] != chroma_def
1394                            || h->chroma_offset[list][i][j] != 0) {
1395                             h->use_weight_chroma= 1;
1396                             h->chroma_weight_flag[list]= 1;
1397                         }
1398                     }
1399                 }else{
1400                     int j;
1401                     for(j=0; j<2; j++){
1402                         h->chroma_weight[list][i][j]= chroma_def;
1403                         h->chroma_offset[list][i][j]= 0;
1404                     }
1405                 }
1406             }
1407         }
1408         if(h->slice_type_nos != FF_B_TYPE) break;
1409     }
1410     h->use_weight= h->use_weight || h->use_weight_chroma;
1411     return 0;
1412 }
1413
1414 static void implicit_weight_table(H264Context *h){
1415     MpegEncContext * const s = &h->s;
1416     int ref0, ref1, i;
1417     int cur_poc = s->current_picture_ptr->poc;
1418
1419     for (i = 0; i < 2; i++) {
1420         h->luma_weight_flag[i]   = 0;
1421         h->chroma_weight_flag[i] = 0;
1422     }
1423
1424     if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
1425        && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
1426         h->use_weight= 0;
1427         h->use_weight_chroma= 0;
1428         return;
1429     }
1430
1431     h->use_weight= 2;
1432     h->use_weight_chroma= 2;
1433     h->luma_log2_weight_denom= 5;
1434     h->chroma_log2_weight_denom= 5;
1435
1436     for(ref0=0; ref0 < h->ref_count[0]; ref0++){
1437         int poc0 = h->ref_list[0][ref0].poc;
1438         for(ref1=0; ref1 < h->ref_count[1]; ref1++){
1439             int poc1 = h->ref_list[1][ref1].poc;
1440             int td = av_clip(poc1 - poc0, -128, 127);
1441             if(td){
1442                 int tb = av_clip(cur_poc - poc0, -128, 127);
1443                 int tx = (16384 + (FFABS(td) >> 1)) / td;
1444                 int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
1445                 if(dist_scale_factor < -64 || dist_scale_factor > 128)
1446                     h->implicit_weight[ref0][ref1] = 32;
1447                 else
1448                     h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
1449             }else
1450                 h->implicit_weight[ref0][ref1] = 32;
1451         }
1452     }
1453 }
1454
1455 /**
1456  * instantaneous decoder refresh.
1457  */
1458 static void idr(H264Context *h){
1459     ff_h264_remove_all_refs(h);
1460     h->prev_frame_num= 0;
1461     h->prev_frame_num_offset= 0;
1462     h->prev_poc_msb=
1463     h->prev_poc_lsb= 0;
1464 }
1465
1466 /* forget old pics after a seek */
1467 static void flush_dpb(AVCodecContext *avctx){
1468     H264Context *h= avctx->priv_data;
1469     int i;
1470     for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
1471         if(h->delayed_pic[i])
1472             h->delayed_pic[i]->reference= 0;
1473         h->delayed_pic[i]= NULL;
1474     }
1475     h->outputed_poc= INT_MIN;
1476     h->prev_interlaced_frame = 1;
1477     idr(h);
1478     if(h->s.current_picture_ptr)
1479         h->s.current_picture_ptr->reference= 0;
1480     h->s.first_field= 0;
1481     ff_h264_reset_sei(h);
1482     ff_mpeg_flush(avctx);
1483 }
1484
1485 static int init_poc(H264Context *h){
1486     MpegEncContext * const s = &h->s;
1487     const int max_frame_num= 1<<h->sps.log2_max_frame_num;
1488     int field_poc[2];
1489     Picture *cur = s->current_picture_ptr;
1490
1491     h->frame_num_offset= h->prev_frame_num_offset;
1492     if(h->frame_num < h->prev_frame_num)
1493         h->frame_num_offset += max_frame_num;
1494
1495     if(h->sps.poc_type==0){
1496         const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
1497
1498         if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
1499             h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1500         else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
1501             h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1502         else
1503             h->poc_msb = h->prev_poc_msb;
1504 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
1505         field_poc[0] =
1506         field_poc[1] = h->poc_msb + h->poc_lsb;
1507         if(s->picture_structure == PICT_FRAME)
1508             field_poc[1] += h->delta_poc_bottom;
1509     }else if(h->sps.poc_type==1){
1510         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1511         int i;
1512
1513         if(h->sps.poc_cycle_length != 0)
1514             abs_frame_num = h->frame_num_offset + h->frame_num;
1515         else
1516             abs_frame_num = 0;
1517
1518         if(h->nal_ref_idc==0 && abs_frame_num > 0)
1519             abs_frame_num--;
1520
1521         expected_delta_per_poc_cycle = 0;
1522         for(i=0; i < h->sps.poc_cycle_length; i++)
1523             expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
1524
1525         if(abs_frame_num > 0){
1526             int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1527             int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1528
1529             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1530             for(i = 0; i <= frame_num_in_poc_cycle; i++)
1531                 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
1532         } else
1533             expectedpoc = 0;
1534
1535         if(h->nal_ref_idc == 0)
1536             expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1537
1538         field_poc[0] = expectedpoc + h->delta_poc[0];
1539         field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1540
1541         if(s->picture_structure == PICT_FRAME)
1542             field_poc[1] += h->delta_poc[1];
1543     }else{
1544         int poc= 2*(h->frame_num_offset + h->frame_num);
1545
1546         if(!h->nal_ref_idc)
1547             poc--;
1548
1549         field_poc[0]= poc;
1550         field_poc[1]= poc;
1551     }
1552
1553     if(s->picture_structure != PICT_BOTTOM_FIELD)
1554         s->current_picture_ptr->field_poc[0]= field_poc[0];
1555     if(s->picture_structure != PICT_TOP_FIELD)
1556         s->current_picture_ptr->field_poc[1]= field_poc[1];
1557     cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
1558
1559     return 0;
1560 }
1561
1562
1563 /**
1564  * initialize scan tables
1565  */
1566 static void init_scan_tables(H264Context *h){
1567     MpegEncContext * const s = &h->s;
1568     int i;
1569     if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
1570         memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
1571         memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
1572     }else{
1573         for(i=0; i<16; i++){
1574 #define T(x) (x>>2) | ((x<<2) & 0xF)
1575             h->zigzag_scan[i] = T(zigzag_scan[i]);
1576             h-> field_scan[i] = T( field_scan[i]);
1577 #undef T
1578         }
1579     }
1580     if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
1581         memcpy(h->zigzag_scan8x8,       ff_zigzag_direct,     64*sizeof(uint8_t));
1582         memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
1583         memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
1584         memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
1585     }else{
1586         for(i=0; i<64; i++){
1587 #define T(x) (x>>3) | ((x&7)<<3)
1588             h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
1589             h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
1590             h->field_scan8x8[i]        = T(field_scan8x8[i]);
1591             h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
1592 #undef T
1593         }
1594     }
1595     if(h->sps.transform_bypass){ //FIXME same ugly
1596         h->zigzag_scan_q0          = zigzag_scan;
1597         h->zigzag_scan8x8_q0       = ff_zigzag_direct;
1598         h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
1599         h->field_scan_q0           = field_scan;
1600         h->field_scan8x8_q0        = field_scan8x8;
1601         h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
1602     }else{
1603         h->zigzag_scan_q0          = h->zigzag_scan;
1604         h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
1605         h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
1606         h->field_scan_q0           = h->field_scan;
1607         h->field_scan8x8_q0        = h->field_scan8x8;
1608         h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
1609     }
1610 }
1611
1612 static void field_end(H264Context *h){
1613     MpegEncContext * const s = &h->s;
1614     AVCodecContext * const avctx= s->avctx;
1615     s->mb_y= 0;
1616
1617     s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
1618     s->current_picture_ptr->pict_type= s->pict_type;
1619
1620     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1621         ff_vdpau_h264_set_reference_frames(s);
1622
1623     if(!s->dropable) {
1624         ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1625         h->prev_poc_msb= h->poc_msb;
1626         h->prev_poc_lsb= h->poc_lsb;
1627     }
1628     h->prev_frame_num_offset= h->frame_num_offset;
1629     h->prev_frame_num= h->frame_num;
1630
1631     if (avctx->hwaccel) {
1632         if (avctx->hwaccel->end_frame(avctx) < 0)
1633             av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1634     }
1635
1636     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1637         ff_vdpau_h264_picture_complete(s);
1638
1639     /*
1640      * FIXME: Error handling code does not seem to support interlaced
1641      * when slices span multiple rows
1642      * The ff_er_add_slice calls don't work right for bottom
1643      * fields; they cause massive erroneous error concealing
1644      * Error marking covers both fields (top and bottom).
1645      * This causes a mismatched s->error_count
1646      * and a bad error table. Further, the error count goes to
1647      * INT_MAX when called for bottom field, because mb_y is
1648      * past end by one (callers fault) and resync_mb_y != 0
1649      * causes problems for the first MB line, too.
1650      */
1651     if (!FIELD_PICTURE)
1652         ff_er_frame_end(s);
1653
1654     MPV_frame_end(s);
1655
1656     h->current_slice=0;
1657 }
1658
1659 /**
1660  * Replicates H264 "master" context to thread contexts.
1661  */
1662 static void clone_slice(H264Context *dst, H264Context *src)
1663 {
1664     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
1665     dst->s.current_picture_ptr  = src->s.current_picture_ptr;
1666     dst->s.current_picture      = src->s.current_picture;
1667     dst->s.linesize             = src->s.linesize;
1668     dst->s.uvlinesize           = src->s.uvlinesize;
1669     dst->s.first_field          = src->s.first_field;
1670
1671     dst->prev_poc_msb           = src->prev_poc_msb;
1672     dst->prev_poc_lsb           = src->prev_poc_lsb;
1673     dst->prev_frame_num_offset  = src->prev_frame_num_offset;
1674     dst->prev_frame_num         = src->prev_frame_num;
1675     dst->short_ref_count        = src->short_ref_count;
1676
1677     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
1678     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
1679     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1680     memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
1681
1682     memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
1683     memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
1684 }
1685
1686 /**
1687  * decodes a slice header.
1688  * This will also call MPV_common_init() and frame_start() as needed.
1689  *
1690  * @param h h264context
1691  * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
1692  *
1693  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1694  */
1695 static int decode_slice_header(H264Context *h, H264Context *h0){
1696     MpegEncContext * const s = &h->s;
1697     MpegEncContext * const s0 = &h0->s;
1698     unsigned int first_mb_in_slice;
1699     unsigned int pps_id;
1700     int num_ref_idx_active_override_flag;
1701     unsigned int slice_type, tmp, i, j;
1702     int default_ref_list_done = 0;
1703     int last_pic_structure;
1704
1705     s->dropable= h->nal_ref_idc == 0;
1706
1707     if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
1708         s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
1709         s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
1710     }else{
1711         s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
1712         s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
1713     }
1714
1715     first_mb_in_slice= get_ue_golomb(&s->gb);
1716
1717     if(first_mb_in_slice == 0){ //FIXME better field boundary detection
1718         if(h0->current_slice && FIELD_PICTURE){
1719             field_end(h);
1720         }
1721
1722         h0->current_slice = 0;
1723         if (!s0->first_field)
1724             s->current_picture_ptr= NULL;
1725     }
1726
1727     slice_type= get_ue_golomb_31(&s->gb);
1728     if(slice_type > 9){
1729         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);
1730         return -1;
1731     }
1732     if(slice_type > 4){
1733         slice_type -= 5;
1734         h->slice_type_fixed=1;
1735     }else
1736         h->slice_type_fixed=0;
1737
1738     slice_type= golomb_to_pict_type[ slice_type ];
1739     if (slice_type == FF_I_TYPE
1740         || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
1741         default_ref_list_done = 1;
1742     }
1743     h->slice_type= slice_type;
1744     h->slice_type_nos= slice_type & 3;
1745
1746     s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
1747
1748     pps_id= get_ue_golomb(&s->gb);
1749     if(pps_id>=MAX_PPS_COUNT){
1750         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
1751         return -1;
1752     }
1753     if(!h0->pps_buffers[pps_id]) {
1754         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
1755         return -1;
1756     }
1757     h->pps= *h0->pps_buffers[pps_id];
1758
1759     if(!h0->sps_buffers[h->pps.sps_id]) {
1760         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
1761         return -1;
1762     }
1763     h->sps = *h0->sps_buffers[h->pps.sps_id];
1764
1765     if(h == h0 && h->dequant_coeff_pps != pps_id){
1766         h->dequant_coeff_pps = pps_id;
1767         init_dequant_tables(h);
1768     }
1769
1770     s->mb_width= h->sps.mb_width;
1771     s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1772
1773     h->b_stride=  s->mb_width*4;
1774     h->b8_stride= s->mb_width*2;
1775
1776     s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
1777     if(h->sps.frame_mbs_only_flag)
1778         s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
1779     else
1780         s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
1781
1782     if (s->context_initialized
1783         && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
1784         if(h != h0)
1785             return -1;   // width / height changed during parallelized decoding
1786         free_tables(h);
1787         flush_dpb(s->avctx);
1788         MPV_common_end(s);
1789     }
1790     if (!s->context_initialized) {
1791         if(h != h0)
1792             return -1;  // we cant (re-)initialize context during parallel decoding
1793
1794         avcodec_set_dimensions(s->avctx, s->width, s->height);
1795         s->avctx->sample_aspect_ratio= h->sps.sar;
1796         if(!s->avctx->sample_aspect_ratio.den)
1797             s->avctx->sample_aspect_ratio.den = 1;
1798
1799         if(h->sps.video_signal_type_present_flag){
1800             s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
1801             if(h->sps.colour_description_present_flag){
1802                 s->avctx->color_primaries = h->sps.color_primaries;
1803                 s->avctx->color_trc       = h->sps.color_trc;
1804                 s->avctx->colorspace      = h->sps.colorspace;
1805             }
1806         }
1807
1808         if(h->sps.timing_info_present_flag){
1809             int64_t den= h->sps.time_scale;
1810             if(h->x264_build < 44U)
1811                 den *= 2;
1812             av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
1813                       h->sps.num_units_in_tick, den, 1<<30);
1814         }
1815         s->avctx->pix_fmt = s->avctx->get_format(s->avctx, s->avctx->codec->pix_fmts);
1816         s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
1817
1818         if (MPV_common_init(s) < 0)
1819             return -1;
1820         s->first_field = 0;
1821         h->prev_interlaced_frame = 1;
1822
1823         init_scan_tables(h);
1824         ff_h264_alloc_tables(h);
1825
1826         for(i = 1; i < s->avctx->thread_count; i++) {
1827             H264Context *c;
1828             c = h->thread_context[i] = av_malloc(sizeof(H264Context));
1829             memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
1830             memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
1831             c->sps = h->sps;
1832             c->pps = h->pps;
1833             init_scan_tables(c);
1834             clone_tables(c, h);
1835         }
1836
1837         for(i = 0; i < s->avctx->thread_count; i++)
1838             if(context_init(h->thread_context[i]) < 0)
1839                 return -1;
1840     }
1841
1842     h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
1843
1844     h->mb_mbaff = 0;
1845     h->mb_aff_frame = 0;
1846     last_pic_structure = s0->picture_structure;
1847     if(h->sps.frame_mbs_only_flag){
1848         s->picture_structure= PICT_FRAME;
1849     }else{
1850         if(get_bits1(&s->gb)) { //field_pic_flag
1851             s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
1852         } else {
1853             s->picture_structure= PICT_FRAME;
1854             h->mb_aff_frame = h->sps.mb_aff;
1855         }
1856     }
1857     h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
1858
1859     if(h0->current_slice == 0){
1860         while(h->frame_num !=  h->prev_frame_num &&
1861               h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
1862             av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
1863             if (ff_h264_frame_start(h) < 0)
1864                 return -1;
1865             h->prev_frame_num++;
1866             h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
1867             s->current_picture_ptr->frame_num= h->prev_frame_num;
1868             ff_h264_execute_ref_pic_marking(h, NULL, 0);
1869         }
1870
1871         /* See if we have a decoded first field looking for a pair... */
1872         if (s0->first_field) {
1873             assert(s0->current_picture_ptr);
1874             assert(s0->current_picture_ptr->data[0]);
1875             assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
1876
1877             /* figure out if we have a complementary field pair */
1878             if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
1879                 /*
1880                  * Previous field is unmatched. Don't display it, but let it
1881                  * remain for reference if marked as such.
1882                  */
1883                 s0->current_picture_ptr = NULL;
1884                 s0->first_field = FIELD_PICTURE;
1885
1886             } else {
1887                 if (h->nal_ref_idc &&
1888                         s0->current_picture_ptr->reference &&
1889                         s0->current_picture_ptr->frame_num != h->frame_num) {
1890                     /*
1891                      * This and previous field were reference, but had
1892                      * different frame_nums. Consider this field first in
1893                      * pair. Throw away previous field except for reference
1894                      * purposes.
1895                      */
1896                     s0->first_field = 1;
1897                     s0->current_picture_ptr = NULL;
1898
1899                 } else {
1900                     /* Second field in complementary pair */
1901                     s0->first_field = 0;
1902                 }
1903             }
1904
1905         } else {
1906             /* Frame or first field in a potentially complementary pair */
1907             assert(!s0->current_picture_ptr);
1908             s0->first_field = FIELD_PICTURE;
1909         }
1910
1911         if((!FIELD_PICTURE || s0->first_field) && ff_h264_frame_start(h) < 0) {
1912             s0->first_field = 0;
1913             return -1;
1914         }
1915     }
1916     if(h != h0)
1917         clone_slice(h, h0);
1918
1919     s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
1920
1921     assert(s->mb_num == s->mb_width * s->mb_height);
1922     if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
1923        first_mb_in_slice                    >= s->mb_num){
1924         av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1925         return -1;
1926     }
1927     s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
1928     s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
1929     if (s->picture_structure == PICT_BOTTOM_FIELD)
1930         s->resync_mb_y = s->mb_y = s->mb_y + 1;
1931     assert(s->mb_y < s->mb_height);
1932
1933     if(s->picture_structure==PICT_FRAME){
1934         h->curr_pic_num=   h->frame_num;
1935         h->max_pic_num= 1<< h->sps.log2_max_frame_num;
1936     }else{
1937         h->curr_pic_num= 2*h->frame_num + 1;
1938         h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
1939     }
1940
1941     if(h->nal_unit_type == NAL_IDR_SLICE){
1942         get_ue_golomb(&s->gb); /* idr_pic_id */
1943     }
1944
1945     if(h->sps.poc_type==0){
1946         h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
1947
1948         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
1949             h->delta_poc_bottom= get_se_golomb(&s->gb);
1950         }
1951     }
1952
1953     if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
1954         h->delta_poc[0]= get_se_golomb(&s->gb);
1955
1956         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
1957             h->delta_poc[1]= get_se_golomb(&s->gb);
1958     }
1959
1960     init_poc(h);
1961
1962     if(h->pps.redundant_pic_cnt_present){
1963         h->redundant_pic_count= get_ue_golomb(&s->gb);
1964     }
1965
1966     //set defaults, might be overridden a few lines later
1967     h->ref_count[0]= h->pps.ref_count[0];
1968     h->ref_count[1]= h->pps.ref_count[1];
1969
1970     if(h->slice_type_nos != FF_I_TYPE){
1971         if(h->slice_type_nos == FF_B_TYPE){
1972             h->direct_spatial_mv_pred= get_bits1(&s->gb);
1973         }
1974         num_ref_idx_active_override_flag= get_bits1(&s->gb);
1975
1976         if(num_ref_idx_active_override_flag){
1977             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
1978             if(h->slice_type_nos==FF_B_TYPE)
1979                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
1980
1981             if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
1982                 av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
1983                 h->ref_count[0]= h->ref_count[1]= 1;
1984                 return -1;
1985             }
1986         }
1987         if(h->slice_type_nos == FF_B_TYPE)
1988             h->list_count= 2;
1989         else
1990             h->list_count= 1;
1991     }else
1992         h->list_count= 0;
1993
1994     if(!default_ref_list_done){
1995         ff_h264_fill_default_ref_list(h);
1996     }
1997
1998     if(h->slice_type_nos!=FF_I_TYPE && ff_h264_decode_ref_pic_list_reordering(h) < 0)
1999         return -1;
2000
2001     if(h->slice_type_nos!=FF_I_TYPE){
2002         s->last_picture_ptr= &h->ref_list[0][0];
2003         ff_copy_picture(&s->last_picture, s->last_picture_ptr);
2004     }
2005     if(h->slice_type_nos==FF_B_TYPE){
2006         s->next_picture_ptr= &h->ref_list[1][0];
2007         ff_copy_picture(&s->next_picture, s->next_picture_ptr);
2008     }
2009
2010     if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
2011        ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
2012         pred_weight_table(h);
2013     else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE)
2014         implicit_weight_table(h);
2015     else {
2016         h->use_weight = 0;
2017         for (i = 0; i < 2; i++) {
2018             h->luma_weight_flag[i]   = 0;
2019             h->chroma_weight_flag[i] = 0;
2020         }
2021     }
2022
2023     if(h->nal_ref_idc)
2024         ff_h264_decode_ref_pic_marking(h0, &s->gb);
2025
2026     if(FRAME_MBAFF)
2027         ff_h264_fill_mbaff_ref_list(h);
2028
2029     if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
2030         ff_h264_direct_dist_scale_factor(h);
2031     ff_h264_direct_ref_list_init(h);
2032
2033     if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
2034         tmp = get_ue_golomb_31(&s->gb);
2035         if(tmp > 2){
2036             av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
2037             return -1;
2038         }
2039         h->cabac_init_idc= tmp;
2040     }
2041
2042     h->last_qscale_diff = 0;
2043     tmp = h->pps.init_qp + get_se_golomb(&s->gb);
2044     if(tmp>51){
2045         av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
2046         return -1;
2047     }
2048     s->qscale= tmp;
2049     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2050     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2051     //FIXME qscale / qp ... stuff
2052     if(h->slice_type == FF_SP_TYPE){
2053         get_bits1(&s->gb); /* sp_for_switch_flag */
2054     }
2055     if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
2056         get_se_golomb(&s->gb); /* slice_qs_delta */
2057     }
2058
2059     h->deblocking_filter = 1;
2060     h->slice_alpha_c0_offset = 52;
2061     h->slice_beta_offset = 52;
2062     if( h->pps.deblocking_filter_parameters_present ) {
2063         tmp= get_ue_golomb_31(&s->gb);
2064         if(tmp > 2){
2065             av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
2066             return -1;
2067         }
2068         h->deblocking_filter= tmp;
2069         if(h->deblocking_filter < 2)
2070             h->deblocking_filter^= 1; // 1<->0
2071
2072         if( h->deblocking_filter ) {
2073             h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
2074             h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
2075             if(   h->slice_alpha_c0_offset > 104U
2076                || h->slice_beta_offset     > 104U){
2077                 av_log(s->avctx, AV_LOG_ERROR, "deblocking filter parameters %d %d out of range\n", h->slice_alpha_c0_offset, h->slice_beta_offset);
2078                 return -1;
2079             }
2080         }
2081     }
2082
2083     if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
2084        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
2085        ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
2086        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2087         h->deblocking_filter= 0;
2088
2089     if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
2090         if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
2091             /* Cheat slightly for speed:
2092                Do not bother to deblock across slices. */
2093             h->deblocking_filter = 2;
2094         } else {
2095             h0->max_contexts = 1;
2096             if(!h0->single_decode_warning) {
2097                 av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
2098                 h0->single_decode_warning = 1;
2099             }
2100             if(h != h0)
2101                 return 1; // deblocking switched inside frame
2102         }
2103     }
2104     h->qp_thresh= 15 + 52 - FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset) - FFMAX3(0, h->pps.chroma_qp_index_offset[0], h->pps.chroma_qp_index_offset[1]);
2105
2106 #if 0 //FMO
2107     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
2108         slice_group_change_cycle= get_bits(&s->gb, ?);
2109 #endif
2110
2111     h0->last_slice_type = slice_type;
2112     h->slice_num = ++h0->current_slice;
2113     if(h->slice_num >= MAX_SLICES){
2114         av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
2115     }
2116
2117     for(j=0; j<2; j++){
2118         int id_list[16];
2119         int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
2120         for(i=0; i<16; i++){
2121             id_list[i]= 60;
2122             if(h->ref_list[j][i].data[0]){
2123                 int k;
2124                 uint8_t *base= h->ref_list[j][i].base[0];
2125                 for(k=0; k<h->short_ref_count; k++)
2126                     if(h->short_ref[k]->base[0] == base){
2127                         id_list[i]= k;
2128                         break;
2129                     }
2130                 for(k=0; k<h->long_ref_count; k++)
2131                     if(h->long_ref[k] && h->long_ref[k]->base[0] == base){
2132                         id_list[i]= h->short_ref_count + k;
2133                         break;
2134                     }
2135             }
2136         }
2137
2138         ref2frm[0]=
2139         ref2frm[1]= -1;
2140         for(i=0; i<16; i++)
2141             ref2frm[i+2]= 4*id_list[i]
2142                           +(h->ref_list[j][i].reference&3);
2143         ref2frm[18+0]=
2144         ref2frm[18+1]= -1;
2145         for(i=16; i<48; i++)
2146             ref2frm[i+4]= 4*id_list[(i-16)>>1]
2147                           +(h->ref_list[j][i].reference&3);
2148     }
2149
2150     h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
2151     h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
2152
2153     s->avctx->refs= h->sps.ref_frame_count;
2154
2155     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2156         av_log(h->s.avctx, AV_LOG_DEBUG, "slice:%d %s mb:%d %c%s%s pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
2157                h->slice_num,
2158                (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
2159                first_mb_in_slice,
2160                av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
2161                pps_id, h->frame_num,
2162                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
2163                h->ref_count[0], h->ref_count[1],
2164                s->qscale,
2165                h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
2166                h->use_weight,
2167                h->use_weight==1 && h->use_weight_chroma ? "c" : "",
2168                h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
2169                );
2170     }
2171
2172     return 0;
2173 }
2174
2175 int ff_h264_get_slice_type(const H264Context *h)
2176 {
2177     switch (h->slice_type) {
2178     case FF_P_TYPE:  return 0;
2179     case FF_B_TYPE:  return 1;
2180     case FF_I_TYPE:  return 2;
2181     case FF_SP_TYPE: return 3;
2182     case FF_SI_TYPE: return 4;
2183     default:         return -1;
2184     }
2185 }
2186
2187 static void loop_filter(H264Context *h){
2188     MpegEncContext * const s = &h->s;
2189     uint8_t  *dest_y, *dest_cb, *dest_cr;
2190     int linesize, uvlinesize, mb_x, mb_y;
2191     const int end_mb_y= s->mb_y + FRAME_MBAFF;
2192     const int old_slice_type= h->slice_type;
2193
2194     if(h->deblocking_filter) {
2195         for(mb_x= 0; mb_x<s->mb_width; mb_x++){
2196             for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
2197                 int mb_xy, mb_type;
2198                 mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
2199                 h->slice_num= h->slice_table[mb_xy];
2200                 mb_type= s->current_picture.mb_type[mb_xy];
2201                 h->list_count= h->list_counts[mb_xy];
2202
2203                 if(FRAME_MBAFF)
2204                     h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2205
2206                 s->mb_x= mb_x;
2207                 s->mb_y= mb_y;
2208                 dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2209                 dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2210                 dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2211                     //FIXME simplify above
2212
2213                 if (MB_FIELD) {
2214                     linesize   = h->mb_linesize   = s->linesize * 2;
2215                     uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2216                     if(mb_y&1){ //FIXME move out of this function?
2217                         dest_y -= s->linesize*15;
2218                         dest_cb-= s->uvlinesize*7;
2219                         dest_cr-= s->uvlinesize*7;
2220                     }
2221                 } else {
2222                     linesize   = h->mb_linesize   = s->linesize;
2223                     uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2224                 }
2225                 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
2226                 if(fill_filter_caches(h, mb_type))
2227                     continue;
2228                 h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2229                 h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2230
2231                 if (FRAME_MBAFF) {
2232                     ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2233                 } else {
2234                     ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2235                 }
2236             }
2237         }
2238     }
2239     h->slice_type= old_slice_type;
2240     s->mb_x= 0;
2241     s->mb_y= end_mb_y - FRAME_MBAFF;
2242     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2243     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2244 }
2245
2246 static void predict_field_decoding_flag(H264Context *h){
2247     MpegEncContext * const s = &h->s;
2248     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
2249     int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
2250                 ? s->current_picture.mb_type[mb_xy-1]
2251                 : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
2252                 ? s->current_picture.mb_type[mb_xy-s->mb_stride]
2253                 : 0;
2254     h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2255 }
2256
2257 static int decode_slice(struct AVCodecContext *avctx, void *arg){
2258     H264Context *h = *(void**)arg;
2259     MpegEncContext * const s = &h->s;
2260     const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
2261
2262     s->mb_skip_run= -1;
2263
2264     h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
2265                     (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
2266
2267     if( h->pps.cabac ) {
2268         /* realign */
2269         align_get_bits( &s->gb );
2270
2271         /* init cabac */
2272         ff_init_cabac_states( &h->cabac);
2273         ff_init_cabac_decoder( &h->cabac,
2274                                s->gb.buffer + get_bits_count(&s->gb)/8,
2275                                (get_bits_left(&s->gb) + 7)/8);
2276
2277         ff_h264_init_cabac_states(h);
2278
2279         for(;;){
2280 //START_TIMER
2281             int ret = ff_h264_decode_mb_cabac(h);
2282             int eos;
2283 //STOP_TIMER("decode_mb_cabac")
2284
2285             if(ret>=0) ff_h264_hl_decode_mb(h);
2286
2287             if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
2288                 s->mb_y++;
2289
2290                 ret = ff_h264_decode_mb_cabac(h);
2291
2292                 if(ret>=0) ff_h264_hl_decode_mb(h);
2293                 s->mb_y--;
2294             }
2295             eos = get_cabac_terminate( &h->cabac );
2296
2297             if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
2298                 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2299                 return 0;
2300             }
2301             if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2302                 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d, bytestream (%td)\n", s->mb_x, s->mb_y, h->cabac.bytestream_end - h->cabac.bytestream);
2303                 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2304                 return -1;
2305             }
2306
2307             if( ++s->mb_x >= s->mb_width ) {
2308                 s->mb_x = 0;
2309                 loop_filter(h);
2310                 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2311                 ++s->mb_y;
2312                 if(FIELD_OR_MBAFF_PICTURE) {
2313                     ++s->mb_y;
2314                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
2315                         predict_field_decoding_flag(h);
2316                 }
2317             }
2318
2319             if( eos || s->mb_y >= s->mb_height ) {
2320                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2321                 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2322                 return 0;
2323             }
2324         }
2325
2326     } else {
2327         for(;;){
2328             int ret = ff_h264_decode_mb_cavlc(h);
2329
2330             if(ret>=0) ff_h264_hl_decode_mb(h);
2331
2332             if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
2333                 s->mb_y++;
2334                 ret = ff_h264_decode_mb_cavlc(h);
2335
2336                 if(ret>=0) ff_h264_hl_decode_mb(h);
2337                 s->mb_y--;
2338             }
2339
2340             if(ret<0){
2341                 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2342                 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2343
2344                 return -1;
2345             }
2346
2347             if(++s->mb_x >= s->mb_width){
2348                 s->mb_x=0;
2349                 loop_filter(h);
2350                 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2351                 ++s->mb_y;
2352                 if(FIELD_OR_MBAFF_PICTURE) {
2353                     ++s->mb_y;
2354                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
2355                         predict_field_decoding_flag(h);
2356                 }
2357                 if(s->mb_y >= s->mb_height){
2358                     tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2359
2360                     if(get_bits_count(&s->gb) == s->gb.size_in_bits ) {
2361                         ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2362
2363                         return 0;
2364                     }else{
2365                         ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2366
2367                         return -1;
2368                     }
2369                 }
2370             }
2371
2372             if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
2373                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2374                 if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
2375                     ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2376
2377                     return 0;
2378                 }else{
2379                     ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2380
2381                     return -1;
2382                 }
2383             }
2384         }
2385     }
2386
2387 #if 0
2388     for(;s->mb_y < s->mb_height; s->mb_y++){
2389         for(;s->mb_x < s->mb_width; s->mb_x++){
2390             int ret= decode_mb(h);
2391
2392             ff_h264_hl_decode_mb(h);
2393
2394             if(ret<0){
2395                 av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2396                 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2397
2398                 return -1;
2399             }
2400
2401             if(++s->mb_x >= s->mb_width){
2402                 s->mb_x=0;
2403                 if(++s->mb_y >= s->mb_height){
2404                     if(get_bits_count(s->gb) == s->gb.size_in_bits){
2405                         ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2406
2407                         return 0;
2408                     }else{
2409                         ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2410
2411                         return -1;
2412                     }
2413                 }
2414             }
2415
2416             if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
2417                 if(get_bits_count(s->gb) == s->gb.size_in_bits){
2418                     ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2419
2420                     return 0;
2421                 }else{
2422                     ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2423
2424                     return -1;
2425                 }
2426             }
2427         }
2428         s->mb_x=0;
2429         ff_draw_horiz_band(s, 16*s->mb_y, 16);
2430     }
2431 #endif
2432     return -1; //not reached
2433 }
2434
2435 /**
2436  * Call decode_slice() for each context.
2437  *
2438  * @param h h264 master context
2439  * @param context_count number of contexts to execute
2440  */
2441 static void execute_decode_slices(H264Context *h, int context_count){
2442     MpegEncContext * const s = &h->s;
2443     AVCodecContext * const avctx= s->avctx;
2444     H264Context *hx;
2445     int i;
2446
2447     if (s->avctx->hwaccel)
2448         return;
2449     if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2450         return;
2451     if(context_count == 1) {
2452         decode_slice(avctx, &h);
2453     } else {
2454         for(i = 1; i < context_count; i++) {
2455             hx = h->thread_context[i];
2456             hx->s.error_recognition = avctx->error_recognition;
2457             hx->s.error_count = 0;
2458         }
2459
2460         avctx->execute(avctx, (void *)decode_slice,
2461                        h->thread_context, NULL, context_count, sizeof(void*));
2462
2463         /* pull back stuff from slices to master context */
2464         hx = h->thread_context[context_count - 1];
2465         s->mb_x = hx->s.mb_x;
2466         s->mb_y = hx->s.mb_y;
2467         s->dropable = hx->s.dropable;
2468         s->picture_structure = hx->s.picture_structure;
2469         for(i = 1; i < context_count; i++)
2470             h->s.error_count += h->thread_context[i]->s.error_count;
2471     }
2472 }
2473
2474
2475 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
2476     MpegEncContext * const s = &h->s;
2477     AVCodecContext * const avctx= s->avctx;
2478     int buf_index=0;
2479     H264Context *hx; ///< thread context
2480     int context_count = 0;
2481     int next_avc= h->is_avc ? 0 : buf_size;
2482
2483     h->max_contexts = avctx->thread_count;
2484 #if 0
2485     int i;
2486     for(i=0; i<50; i++){
2487         av_log(NULL, AV_LOG_ERROR,"%02X ", buf[i]);
2488     }
2489 #endif
2490     if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
2491         h->current_slice = 0;
2492         if (!s->first_field)
2493             s->current_picture_ptr= NULL;
2494         ff_h264_reset_sei(h);
2495     }
2496
2497     for(;;){
2498         int consumed;
2499         int dst_length;
2500         int bit_length;
2501         const uint8_t *ptr;
2502         int i, nalsize = 0;
2503         int err;
2504
2505         if(buf_index >= next_avc) {
2506             if(buf_index >= buf_size) break;
2507             nalsize = 0;
2508             for(i = 0; i < h->nal_length_size; i++)
2509                 nalsize = (nalsize << 8) | buf[buf_index++];
2510             if(nalsize <= 1 || nalsize > buf_size - buf_index){
2511                 if(nalsize == 1){
2512                     buf_index++;
2513                     continue;
2514                 }else{
2515                     av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
2516                     break;
2517                 }
2518             }
2519             next_avc= buf_index + nalsize;
2520         } else {
2521             // start code prefix search
2522             for(; buf_index + 3 < next_avc; buf_index++){
2523                 // This should always succeed in the first iteration.
2524                 if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
2525                     break;
2526             }
2527
2528             if(buf_index+3 >= buf_size) break;
2529
2530             buf_index+=3;
2531             if(buf_index >= next_avc) continue;
2532         }
2533
2534         hx = h->thread_context[context_count];
2535
2536         ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
2537         if (ptr==NULL || dst_length < 0){
2538             return -1;
2539         }
2540         i= buf_index + consumed;
2541         if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
2542            buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
2543             s->workaround_bugs |= FF_BUG_TRUNCATED;
2544
2545         if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
2546         while(ptr[dst_length - 1] == 0 && dst_length > 0)
2547             dst_length--;
2548         }
2549         bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
2550
2551         if(s->avctx->debug&FF_DEBUG_STARTCODE){
2552             av_log(h->s.avctx, AV_LOG_DEBUG, "NAL %d at %d/%d length %d\n", hx->nal_unit_type, buf_index, buf_size, dst_length);
2553         }
2554
2555         if (h->is_avc && (nalsize != consumed) && nalsize){
2556             av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
2557         }
2558
2559         buf_index += consumed;
2560
2561         if(  (s->hurry_up == 1 && h->nal_ref_idc  == 0) //FIXME do not discard SEI id
2562            ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0))
2563             continue;
2564
2565       again:
2566         err = 0;
2567         switch(hx->nal_unit_type){
2568         case NAL_IDR_SLICE:
2569             if (h->nal_unit_type != NAL_IDR_SLICE) {
2570                 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
2571                 return -1;
2572             }
2573             idr(h); //FIXME ensure we don't loose some frames if there is reordering
2574         case NAL_SLICE:
2575             init_get_bits(&hx->s.gb, ptr, bit_length);
2576             hx->intra_gb_ptr=
2577             hx->inter_gb_ptr= &hx->s.gb;
2578             hx->s.data_partitioning = 0;
2579
2580             if((err = decode_slice_header(hx, h)))
2581                break;
2582
2583             avctx->profile = hx->sps.profile_idc;
2584             avctx->level   = hx->sps.level_idc;
2585
2586             if (s->avctx->hwaccel && h->current_slice == 1) {
2587                 if (s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
2588                     return -1;
2589             }
2590
2591             s->current_picture_ptr->key_frame |=
2592                     (hx->nal_unit_type == NAL_IDR_SLICE) ||
2593                     (h->sei_recovery_frame_cnt >= 0);
2594             if(hx->redundant_pic_count==0 && hx->s.hurry_up < 5
2595                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2596                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2597                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2598                && avctx->skip_frame < AVDISCARD_ALL){
2599                 if(avctx->hwaccel) {
2600                     if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
2601                         return -1;
2602                 }else
2603                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
2604                     static const uint8_t start_code[] = {0x00, 0x00, 0x01};
2605                     ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
2606                     ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
2607                 }else
2608                     context_count++;
2609             }
2610             break;
2611         case NAL_DPA:
2612             init_get_bits(&hx->s.gb, ptr, bit_length);
2613             hx->intra_gb_ptr=
2614             hx->inter_gb_ptr= NULL;
2615
2616             if ((err = decode_slice_header(hx, h)) < 0)
2617                 break;
2618
2619             avctx->profile = hx->sps.profile_idc;
2620             avctx->level   = hx->sps.level_idc;
2621
2622             hx->s.data_partitioning = 1;
2623
2624             break;
2625         case NAL_DPB:
2626             init_get_bits(&hx->intra_gb, ptr, bit_length);
2627             hx->intra_gb_ptr= &hx->intra_gb;
2628             break;
2629         case NAL_DPC:
2630             init_get_bits(&hx->inter_gb, ptr, bit_length);
2631             hx->inter_gb_ptr= &hx->inter_gb;
2632
2633             if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
2634                && s->context_initialized
2635                && s->hurry_up < 5
2636                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2637                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2638                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2639                && avctx->skip_frame < AVDISCARD_ALL)
2640                 context_count++;
2641             break;
2642         case NAL_SEI:
2643             init_get_bits(&s->gb, ptr, bit_length);
2644             ff_h264_decode_sei(h);
2645             break;
2646         case NAL_SPS:
2647             init_get_bits(&s->gb, ptr, bit_length);
2648             ff_h264_decode_seq_parameter_set(h);
2649
2650             if(s->flags& CODEC_FLAG_LOW_DELAY)
2651                 s->low_delay=1;
2652
2653             if(avctx->has_b_frames < 2)
2654                 avctx->has_b_frames= !s->low_delay;
2655             break;
2656         case NAL_PPS:
2657             init_get_bits(&s->gb, ptr, bit_length);
2658
2659             ff_h264_decode_picture_parameter_set(h, bit_length);
2660
2661             break;
2662         case NAL_AUD:
2663         case NAL_END_SEQUENCE:
2664         case NAL_END_STREAM:
2665         case NAL_FILLER_DATA:
2666         case NAL_SPS_EXT:
2667         case NAL_AUXILIARY_SLICE:
2668             break;
2669         default:
2670             av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
2671         }
2672
2673         if(context_count == h->max_contexts) {
2674             execute_decode_slices(h, context_count);
2675             context_count = 0;
2676         }
2677
2678         if (err < 0)
2679             av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
2680         else if(err == 1) {
2681             /* Slice could not be decoded in parallel mode, copy down
2682              * NAL unit stuff to context 0 and restart. Note that
2683              * rbsp_buffer is not transferred, but since we no longer
2684              * run in parallel mode this should not be an issue. */
2685             h->nal_unit_type = hx->nal_unit_type;
2686             h->nal_ref_idc   = hx->nal_ref_idc;
2687             hx = h;
2688             goto again;
2689         }
2690     }
2691     if(context_count)
2692         execute_decode_slices(h, context_count);
2693     return buf_index;
2694 }
2695
2696 /**
2697  * returns the number of bytes consumed for building the current frame
2698  */
2699 static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
2700         if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
2701         if(pos+10>buf_size) pos=buf_size; // oops ;)
2702
2703         return pos;
2704 }
2705
2706 static int decode_frame(AVCodecContext *avctx,
2707                              void *data, int *data_size,
2708                              AVPacket *avpkt)
2709 {
2710     const uint8_t *buf = avpkt->data;
2711     int buf_size = avpkt->size;
2712     H264Context *h = avctx->priv_data;
2713     MpegEncContext *s = &h->s;
2714     AVFrame *pict = data;
2715     int buf_index;
2716
2717     s->flags= avctx->flags;
2718     s->flags2= avctx->flags2;
2719
2720    /* end of stream, output what is still in the buffers */
2721     if (buf_size == 0) {
2722         Picture *out;
2723         int i, out_idx;
2724
2725 //FIXME factorize this with the output code below
2726         out = h->delayed_pic[0];
2727         out_idx = 0;
2728         for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2729             if(h->delayed_pic[i]->poc < out->poc){
2730                 out = h->delayed_pic[i];
2731                 out_idx = i;
2732             }
2733
2734         for(i=out_idx; h->delayed_pic[i]; i++)
2735             h->delayed_pic[i] = h->delayed_pic[i+1];
2736
2737         if(out){
2738             *data_size = sizeof(AVFrame);
2739             *pict= *(AVFrame*)out;
2740         }
2741
2742         return 0;
2743     }
2744
2745     buf_index=decode_nal_units(h, buf, buf_size);
2746     if(buf_index < 0)
2747         return -1;
2748
2749     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
2750         if (avctx->skip_frame >= AVDISCARD_NONREF || s->hurry_up) return 0;
2751         av_log(avctx, AV_LOG_ERROR, "no frame!\n");
2752         return -1;
2753     }
2754
2755     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
2756         Picture *out = s->current_picture_ptr;
2757         Picture *cur = s->current_picture_ptr;
2758         int i, pics, out_of_order, out_idx;
2759
2760         field_end(h);
2761
2762         if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
2763             /* Wait for second field. */
2764             *data_size = 0;
2765
2766         } else {
2767             cur->interlaced_frame = 0;
2768             cur->repeat_pict = 0;
2769
2770             /* Signal interlacing information externally. */
2771             /* Prioritize picture timing SEI information over used decoding process if it exists. */
2772
2773             if(h->sps.pic_struct_present_flag){
2774                 switch (h->sei_pic_struct)
2775                 {
2776                 case SEI_PIC_STRUCT_FRAME:
2777                     break;
2778                 case SEI_PIC_STRUCT_TOP_FIELD:
2779                 case SEI_PIC_STRUCT_BOTTOM_FIELD:
2780                     cur->interlaced_frame = 1;
2781                     break;
2782                 case SEI_PIC_STRUCT_TOP_BOTTOM:
2783                 case SEI_PIC_STRUCT_BOTTOM_TOP:
2784                     if (FIELD_OR_MBAFF_PICTURE)
2785                         cur->interlaced_frame = 1;
2786                     else
2787                         // try to flag soft telecine progressive
2788                         cur->interlaced_frame = h->prev_interlaced_frame;
2789                     break;
2790                 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
2791                 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
2792                     // Signal the possibility of telecined film externally (pic_struct 5,6)
2793                     // From these hints, let the applications decide if they apply deinterlacing.
2794                     cur->repeat_pict = 1;
2795                     break;
2796                 case SEI_PIC_STRUCT_FRAME_DOUBLING:
2797                     // Force progressive here, as doubling interlaced frame is a bad idea.
2798                     cur->repeat_pict = 2;
2799                     break;
2800                 case SEI_PIC_STRUCT_FRAME_TRIPLING:
2801                     cur->repeat_pict = 4;
2802                     break;
2803                 }
2804
2805                 if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
2806                     cur->interlaced_frame = (h->sei_ct_type & (1<<1)) != 0;
2807             }else{
2808                 /* Derive interlacing flag from used decoding process. */
2809                 cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
2810             }
2811             h->prev_interlaced_frame = cur->interlaced_frame;
2812
2813             if (cur->field_poc[0] != cur->field_poc[1]){
2814                 /* Derive top_field_first from field pocs. */
2815                 cur->top_field_first = cur->field_poc[0] < cur->field_poc[1];
2816             }else{
2817                 if(cur->interlaced_frame || h->sps.pic_struct_present_flag){
2818                     /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
2819                     if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
2820                       || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
2821                         cur->top_field_first = 1;
2822                     else
2823                         cur->top_field_first = 0;
2824                 }else{
2825                     /* Most likely progressive */
2826                     cur->top_field_first = 0;
2827                 }
2828             }
2829
2830         //FIXME do something with unavailable reference frames
2831
2832             /* Sort B-frames into display order */
2833
2834             if(h->sps.bitstream_restriction_flag
2835                && s->avctx->has_b_frames < h->sps.num_reorder_frames){
2836                 s->avctx->has_b_frames = h->sps.num_reorder_frames;
2837                 s->low_delay = 0;
2838             }
2839
2840             if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
2841                && !h->sps.bitstream_restriction_flag){
2842                 s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
2843                 s->low_delay= 0;
2844             }
2845
2846             pics = 0;
2847             while(h->delayed_pic[pics]) pics++;
2848
2849             assert(pics <= MAX_DELAYED_PIC_COUNT);
2850
2851             h->delayed_pic[pics++] = cur;
2852             if(cur->reference == 0)
2853                 cur->reference = DELAYED_PIC_REF;
2854
2855             out = h->delayed_pic[0];
2856             out_idx = 0;
2857             for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2858                 if(h->delayed_pic[i]->poc < out->poc){
2859                     out = h->delayed_pic[i];
2860                     out_idx = i;
2861                 }
2862             if(s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset))
2863                 h->outputed_poc= INT_MIN;
2864             out_of_order = out->poc < h->outputed_poc;
2865
2866             if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
2867                 { }
2868             else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
2869                || (s->low_delay &&
2870                 ((h->outputed_poc != INT_MIN && out->poc > h->outputed_poc + 2)
2871                  || cur->pict_type == FF_B_TYPE)))
2872             {
2873                 s->low_delay = 0;
2874                 s->avctx->has_b_frames++;
2875             }
2876
2877             if(out_of_order || pics > s->avctx->has_b_frames){
2878                 out->reference &= ~DELAYED_PIC_REF;
2879                 for(i=out_idx; h->delayed_pic[i]; i++)
2880                     h->delayed_pic[i] = h->delayed_pic[i+1];
2881             }
2882             if(!out_of_order && pics > s->avctx->has_b_frames){
2883                 *data_size = sizeof(AVFrame);
2884
2885                 if(out_idx==0 && h->delayed_pic[0] && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset)) {
2886                     h->outputed_poc = INT_MIN;
2887                 } else
2888                     h->outputed_poc = out->poc;
2889                 *pict= *(AVFrame*)out;
2890             }else{
2891                 av_log(avctx, AV_LOG_DEBUG, "no picture\n");
2892             }
2893         }
2894     }
2895
2896     assert(pict->data[0] || !*data_size);
2897     ff_print_debug_info(s, pict);
2898 //printf("out %d\n", (int)pict->data[0]);
2899
2900     return get_consumed_bytes(s, buf_index, buf_size);
2901 }
2902 #if 0
2903 static inline void fill_mb_avail(H264Context *h){
2904     MpegEncContext * const s = &h->s;
2905     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
2906
2907     if(s->mb_y){
2908         h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
2909         h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
2910         h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
2911     }else{
2912         h->mb_avail[0]=
2913         h->mb_avail[1]=
2914         h->mb_avail[2]= 0;
2915     }
2916     h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
2917     h->mb_avail[4]= 1; //FIXME move out
2918     h->mb_avail[5]= 0; //FIXME move out
2919 }
2920 #endif
2921
2922 #ifdef TEST
2923 #undef printf
2924 #undef random
2925 #define COUNT 8000
2926 #define SIZE (COUNT*40)
2927 int main(void){
2928     int i;
2929     uint8_t temp[SIZE];
2930     PutBitContext pb;
2931     GetBitContext gb;
2932 //    int int_temp[10000];
2933     DSPContext dsp;
2934     AVCodecContext avctx;
2935
2936     dsputil_init(&dsp, &avctx);
2937
2938     init_put_bits(&pb, temp, SIZE);
2939     printf("testing unsigned exp golomb\n");
2940     for(i=0; i<COUNT; i++){
2941         START_TIMER
2942         set_ue_golomb(&pb, i);
2943         STOP_TIMER("set_ue_golomb");
2944     }
2945     flush_put_bits(&pb);
2946
2947     init_get_bits(&gb, temp, 8*SIZE);
2948     for(i=0; i<COUNT; i++){
2949         int j, s;
2950
2951         s= show_bits(&gb, 24);
2952
2953         START_TIMER
2954         j= get_ue_golomb(&gb);
2955         if(j != i){
2956             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
2957 //            return -1;
2958         }
2959         STOP_TIMER("get_ue_golomb");
2960     }
2961
2962
2963     init_put_bits(&pb, temp, SIZE);
2964     printf("testing signed exp golomb\n");
2965     for(i=0; i<COUNT; i++){
2966         START_TIMER
2967         set_se_golomb(&pb, i - COUNT/2);
2968         STOP_TIMER("set_se_golomb");
2969     }
2970     flush_put_bits(&pb);
2971
2972     init_get_bits(&gb, temp, 8*SIZE);
2973     for(i=0; i<COUNT; i++){
2974         int j, s;
2975
2976         s= show_bits(&gb, 24);
2977
2978         START_TIMER
2979         j= get_se_golomb(&gb);
2980         if(j != i - COUNT/2){
2981             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
2982 //            return -1;
2983         }
2984         STOP_TIMER("get_se_golomb");
2985     }
2986
2987 #if 0
2988     printf("testing 4x4 (I)DCT\n");
2989
2990     DCTELEM block[16];
2991     uint8_t src[16], ref[16];
2992     uint64_t error= 0, max_error=0;
2993
2994     for(i=0; i<COUNT; i++){
2995         int j;
2996 //        printf("%d %d %d\n", r1, r2, (r2-r1)*16);
2997         for(j=0; j<16; j++){
2998             ref[j]= random()%255;
2999             src[j]= random()%255;
3000         }
3001
3002         h264_diff_dct_c(block, src, ref, 4);
3003
3004         //normalize
3005         for(j=0; j<16; j++){
3006 //            printf("%d ", block[j]);
3007             block[j]= block[j]*4;
3008             if(j&1) block[j]= (block[j]*4 + 2)/5;
3009             if(j&4) block[j]= (block[j]*4 + 2)/5;
3010         }
3011 //        printf("\n");
3012
3013         s->dsp.h264_idct_add(ref, block, 4);
3014 /*        for(j=0; j<16; j++){
3015             printf("%d ", ref[j]);
3016         }
3017         printf("\n");*/
3018
3019         for(j=0; j<16; j++){
3020             int diff= FFABS(src[j] - ref[j]);
3021
3022             error+= diff*diff;
3023             max_error= FFMAX(max_error, diff);
3024         }
3025     }
3026     printf("error=%f max_error=%d\n", ((float)error)/COUNT/16, (int)max_error );
3027     printf("testing quantizer\n");
3028     for(qp=0; qp<52; qp++){
3029         for(i=0; i<16; i++)
3030             src1_block[i]= src2_block[i]= random()%255;
3031
3032     }
3033     printf("Testing NAL layer\n");
3034
3035     uint8_t bitstream[COUNT];
3036     uint8_t nal[COUNT*2];
3037     H264Context h;
3038     memset(&h, 0, sizeof(H264Context));
3039
3040     for(i=0; i<COUNT; i++){
3041         int zeros= i;
3042         int nal_length;
3043         int consumed;
3044         int out_length;
3045         uint8_t *out;
3046         int j;
3047
3048         for(j=0; j<COUNT; j++){
3049             bitstream[j]= (random() % 255) + 1;
3050         }
3051
3052         for(j=0; j<zeros; j++){
3053             int pos= random() % COUNT;
3054             while(bitstream[pos] == 0){
3055                 pos++;
3056                 pos %= COUNT;
3057             }
3058             bitstream[pos]=0;
3059         }
3060
3061         START_TIMER
3062
3063         nal_length= encode_nal(&h, nal, bitstream, COUNT, COUNT*2);
3064         if(nal_length<0){
3065             printf("encoding failed\n");
3066             return -1;
3067         }
3068
3069         out= ff_h264_decode_nal(&h, nal, &out_length, &consumed, nal_length);
3070
3071         STOP_TIMER("NAL")
3072
3073         if(out_length != COUNT){
3074             printf("incorrect length %d %d\n", out_length, COUNT);
3075             return -1;
3076         }
3077
3078         if(consumed != nal_length){
3079             printf("incorrect consumed length %d %d\n", nal_length, consumed);
3080             return -1;
3081         }
3082
3083         if(memcmp(bitstream, out, COUNT)){
3084             printf("mismatch\n");
3085             return -1;
3086         }
3087     }
3088 #endif
3089
3090     printf("Testing RBSP\n");
3091
3092
3093     return 0;
3094 }
3095 #endif /* TEST */
3096
3097
3098 av_cold void ff_h264_free_context(H264Context *h)
3099 {
3100     int i;
3101
3102     free_tables(h); //FIXME cleanup init stuff perhaps
3103
3104     for(i = 0; i < MAX_SPS_COUNT; i++)
3105         av_freep(h->sps_buffers + i);
3106
3107     for(i = 0; i < MAX_PPS_COUNT; i++)
3108         av_freep(h->pps_buffers + i);
3109 }
3110
3111 av_cold int ff_h264_decode_end(AVCodecContext *avctx)
3112 {
3113     H264Context *h = avctx->priv_data;
3114     MpegEncContext *s = &h->s;
3115
3116     ff_h264_free_context(h);
3117
3118     MPV_common_end(s);
3119
3120 //    memset(h, 0, sizeof(H264Context));
3121
3122     return 0;
3123 }
3124
3125
3126 AVCodec h264_decoder = {
3127     "h264",
3128     CODEC_TYPE_VIDEO,
3129     CODEC_ID_H264,
3130     sizeof(H264Context),
3131     ff_h264_decode_init,
3132     NULL,
3133     ff_h264_decode_end,
3134     decode_frame,
3135     /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY,
3136     .flush= flush_dpb,
3137     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
3138     .pix_fmts= ff_hwaccel_pixfmt_list_420,
3139 };
3140
3141 #if CONFIG_H264_VDPAU_DECODER
3142 AVCodec h264_vdpau_decoder = {
3143     "h264_vdpau",
3144     CODEC_TYPE_VIDEO,
3145     CODEC_ID_H264,
3146     sizeof(H264Context),
3147     ff_h264_decode_init,
3148     NULL,
3149     ff_h264_decode_end,
3150     decode_frame,
3151     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
3152     .flush= flush_dpb,
3153     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
3154     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
3155 };
3156 #endif