Detect byte-swapped AC-3 and support decoding it directly.
[ffmpeg.git] / libavcodec / h264.c
1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; 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
24  * H.264 / AVC / MPEG4 part10 codec.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27
28 #include "libavutil/imgutils.h"
29 #include "internal.h"
30 #include "dsputil.h"
31 #include "avcodec.h"
32 #include "mpegvideo.h"
33 #include "h264.h"
34 #include "h264data.h"
35 #include "h264_mvpred.h"
36 #include "golomb.h"
37 #include "mathops.h"
38 #include "rectangle.h"
39 #include "vdpau_internal.h"
40 #include "libavutil/avassert.h"
41
42 #include "cabac.h"
43
44 //#undef NDEBUG
45 #include <assert.h>
46
47 static const uint8_t rem6[52]={
48 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,
49 };
50
51 static const uint8_t div6[52]={
52 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,
53 };
54
55 static const enum PixelFormat hwaccel_pixfmt_list_h264_jpeg_420[] = {
56     PIX_FMT_DXVA2_VLD,
57     PIX_FMT_VAAPI_VLD,
58     PIX_FMT_YUVJ420P,
59     PIX_FMT_NONE
60 };
61
62 void ff_h264_write_back_intra_pred_mode(H264Context *h){
63     int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
64
65     AV_COPY32(mode, h->intra4x4_pred_mode_cache + 4 + 8*4);
66     mode[4]= h->intra4x4_pred_mode_cache[7+8*3];
67     mode[5]= h->intra4x4_pred_mode_cache[7+8*2];
68     mode[6]= h->intra4x4_pred_mode_cache[7+8*1];
69 }
70
71 /**
72  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
73  */
74 int ff_h264_check_intra4x4_pred_mode(H264Context *h){
75     MpegEncContext * const s = &h->s;
76     static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
77     static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
78     int i;
79
80     if(!(h->top_samples_available&0x8000)){
81         for(i=0; i<4; i++){
82             int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
83             if(status<0){
84                 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);
85                 return -1;
86             } else if(status){
87                 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
88             }
89         }
90     }
91
92     if((h->left_samples_available&0x8888)!=0x8888){
93         static const int mask[4]={0x8000,0x2000,0x80,0x20};
94         for(i=0; i<4; i++){
95             if(!(h->left_samples_available&mask[i])){
96                 int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
97                 if(status<0){
98                     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);
99                     return -1;
100                 } else if(status){
101                     h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
102                 }
103             }
104         }
105     }
106
107     return 0;
108 } //FIXME cleanup like ff_h264_check_intra_pred_mode
109
110 /**
111  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
112  */
113 int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
114     MpegEncContext * const s = &h->s;
115     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
116     static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
117
118     if(mode > 6U) {
119         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);
120         return -1;
121     }
122
123     if(!(h->top_samples_available&0x8000)){
124         mode= top[ mode ];
125         if(mode<0){
126             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);
127             return -1;
128         }
129     }
130
131     if((h->left_samples_available&0x8080) != 0x8080){
132         mode= left[ mode ];
133         if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
134             mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
135         }
136         if(mode<0){
137             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);
138             return -1;
139         }
140     }
141
142     return mode;
143 }
144
145 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
146     int i, si, di;
147     uint8_t *dst;
148     int bufidx;
149
150 //    src[0]&0x80;                //forbidden bit
151     h->nal_ref_idc= src[0]>>5;
152     h->nal_unit_type= src[0]&0x1F;
153
154     src++; length--;
155 #if 0
156     for(i=0; i<length; i++)
157         printf("%2X ", src[i]);
158 #endif
159
160 #if HAVE_FAST_UNALIGNED
161 # if HAVE_FAST_64BIT
162 #   define RS 7
163     for(i=0; i+1<length; i+=9){
164         if(!((~AV_RN64A(src+i) & (AV_RN64A(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
165 # else
166 #   define RS 3
167     for(i=0; i+1<length; i+=5){
168         if(!((~AV_RN32A(src+i) & (AV_RN32A(src+i) - 0x01000101U)) & 0x80008080U))
169 # endif
170             continue;
171         if(i>0 && !src[i]) i--;
172         while(src[i]) i++;
173 #else
174 #   define RS 0
175     for(i=0; i+1<length; i+=2){
176         if(src[i]) continue;
177         if(i>0 && src[i-1]==0) i--;
178 #endif
179         if(i+2<length && src[i+1]==0 && src[i+2]<=3){
180             if(src[i+2]!=3){
181                 /* startcode, so we must be past the end */
182                 length=i;
183             }
184             break;
185         }
186         i-= RS;
187     }
188
189     if(i>=length-1){ //no escaped 0
190         *dst_length= length;
191         *consumed= length+1; //+1 for the header
192         return src;
193     }
194
195     bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
196     av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
197     dst= h->rbsp_buffer[bufidx];
198
199     if (dst == NULL){
200         return NULL;
201     }
202
203 //printf("decoding esc\n");
204     memcpy(dst, src, i);
205     si=di=i;
206     while(si+2<length){
207         //remove escapes (very rare 1:2^22)
208         if(src[si+2]>3){
209             dst[di++]= src[si++];
210             dst[di++]= src[si++];
211         }else if(src[si]==0 && src[si+1]==0){
212             if(src[si+2]==3){ //escape
213                 dst[di++]= 0;
214                 dst[di++]= 0;
215                 si+=3;
216                 continue;
217             }else //next start code
218                 goto nsc;
219         }
220
221         dst[di++]= src[si++];
222     }
223     while(si<length)
224         dst[di++]= src[si++];
225 nsc:
226
227     memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
228
229     *dst_length= di;
230     *consumed= si + 1;//+1 for the header
231 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
232     return dst;
233 }
234
235 /**
236  * Identify the exact end of the bitstream
237  * @return the length of the trailing, or 0 if damaged
238  */
239 static int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
240     int v= *src;
241     int r;
242
243     tprintf(h->s.avctx, "rbsp trailing %X\n", v);
244
245     for(r=1; r<9; r++){
246         if(v&1) return r;
247         v>>=1;
248     }
249     return 0;
250 }
251
252 #if 0
253 /**
254  * DCT transforms the 16 dc values.
255  * @param qp quantization parameter ??? FIXME
256  */
257 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
258 //    const int qmul= dequant_coeff[qp][0];
259     int i;
260     int temp[16]; //FIXME check if this is a good idea
261     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
262     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
263
264     for(i=0; i<4; i++){
265         const int offset= y_offset[i];
266         const int z0= block[offset+stride*0] + block[offset+stride*4];
267         const int z1= block[offset+stride*0] - block[offset+stride*4];
268         const int z2= block[offset+stride*1] - block[offset+stride*5];
269         const int z3= block[offset+stride*1] + block[offset+stride*5];
270
271         temp[4*i+0]= z0+z3;
272         temp[4*i+1]= z1+z2;
273         temp[4*i+2]= z1-z2;
274         temp[4*i+3]= z0-z3;
275     }
276
277     for(i=0; i<4; i++){
278         const int offset= x_offset[i];
279         const int z0= temp[4*0+i] + temp[4*2+i];
280         const int z1= temp[4*0+i] - temp[4*2+i];
281         const int z2= temp[4*1+i] - temp[4*3+i];
282         const int z3= temp[4*1+i] + temp[4*3+i];
283
284         block[stride*0 +offset]= (z0 + z3)>>1;
285         block[stride*2 +offset]= (z1 + z2)>>1;
286         block[stride*8 +offset]= (z1 - z2)>>1;
287         block[stride*10+offset]= (z0 - z3)>>1;
288     }
289 }
290 #endif
291
292 #undef xStride
293 #undef stride
294
295 static void chroma_dc_dequant_idct_c(DCTELEM *block, int qmul){
296     const int stride= 16*2;
297     const int xStride= 16;
298     int a,b,c,d,e;
299
300     a= block[stride*0 + xStride*0];
301     b= block[stride*0 + xStride*1];
302     c= block[stride*1 + xStride*0];
303     d= block[stride*1 + xStride*1];
304
305     e= a-b;
306     a= a+b;
307     b= c-d;
308     c= c+d;
309
310     block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
311     block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
312     block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
313     block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
314 }
315
316 #if 0
317 static void chroma_dc_dct_c(DCTELEM *block){
318     const int stride= 16*2;
319     const int xStride= 16;
320     int a,b,c,d,e;
321
322     a= block[stride*0 + xStride*0];
323     b= block[stride*0 + xStride*1];
324     c= block[stride*1 + xStride*0];
325     d= block[stride*1 + xStride*1];
326
327     e= a-b;
328     a= a+b;
329     b= c-d;
330     c= c+d;
331
332     block[stride*0 + xStride*0]= (a+c);
333     block[stride*0 + xStride*1]= (e+b);
334     block[stride*1 + xStride*0]= (a-c);
335     block[stride*1 + xStride*1]= (e-b);
336 }
337 #endif
338
339 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
340                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
341                            int src_x_offset, int src_y_offset,
342                            qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
343     MpegEncContext * const s = &h->s;
344     const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
345     int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
346     const int luma_xy= (mx&3) + ((my&3)<<2);
347     uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
348     uint8_t * src_cb, * src_cr;
349     int extra_width= h->emu_edge_width;
350     int extra_height= h->emu_edge_height;
351     int emu=0;
352     const int full_mx= mx>>2;
353     const int full_my= my>>2;
354     const int pic_width  = 16*s->mb_width;
355     const int pic_height = 16*s->mb_height >> MB_FIELD;
356
357     if(mx&7) extra_width -= 3;
358     if(my&7) extra_height -= 3;
359
360     if(   full_mx < 0-extra_width
361        || full_my < 0-extra_height
362        || full_mx + 16/*FIXME*/ > pic_width + extra_width
363        || full_my + 16/*FIXME*/ > pic_height + extra_height){
364         s->dsp.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);
365             src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
366         emu=1;
367     }
368
369     qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
370     if(!square){
371         qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
372     }
373
374     if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
375
376     if(MB_FIELD){
377         // chroma offset when predicting from a field of opposite parity
378         my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
379         emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
380     }
381     src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
382     src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
383
384     if(emu){
385         s->dsp.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);
386             src_cb= s->edge_emu_buffer;
387     }
388     chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
389
390     if(emu){
391         s->dsp.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);
392             src_cr= s->edge_emu_buffer;
393     }
394     chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
395 }
396
397 static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
398                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
399                            int x_offset, int y_offset,
400                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
401                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
402                            int list0, int list1){
403     MpegEncContext * const s = &h->s;
404     qpel_mc_func *qpix_op=  qpix_put;
405     h264_chroma_mc_func chroma_op= chroma_put;
406
407     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
408     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
409     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
410     x_offset += 8*s->mb_x;
411     y_offset += 8*(s->mb_y >> MB_FIELD);
412
413     if(list0){
414         Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
415         mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
416                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
417                            qpix_op, chroma_op);
418
419         qpix_op=  qpix_avg;
420         chroma_op= chroma_avg;
421     }
422
423     if(list1){
424         Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
425         mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
426                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
427                            qpix_op, chroma_op);
428     }
429 }
430
431 static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
432                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
433                            int x_offset, int y_offset,
434                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
435                            h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
436                            h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
437                            int list0, int list1){
438     MpegEncContext * const s = &h->s;
439
440     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
441     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
442     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
443     x_offset += 8*s->mb_x;
444     y_offset += 8*(s->mb_y >> MB_FIELD);
445
446     if(list0 && list1){
447         /* don't optimize for luma-only case, since B-frames usually
448          * use implicit weights => chroma too. */
449         uint8_t *tmp_cb = s->obmc_scratchpad;
450         uint8_t *tmp_cr = s->obmc_scratchpad + 8;
451         uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
452         int refn0 = h->ref_cache[0][ scan8[n] ];
453         int refn1 = h->ref_cache[1][ scan8[n] ];
454
455         mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
456                     dest_y, dest_cb, dest_cr,
457                     x_offset, y_offset, qpix_put, chroma_put);
458         mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
459                     tmp_y, tmp_cb, tmp_cr,
460                     x_offset, y_offset, qpix_put, chroma_put);
461
462         if(h->use_weight == 2){
463             int weight0 = h->implicit_weight[refn0][refn1][s->mb_y&1];
464             int weight1 = 64 - weight0;
465             luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
466             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
467             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
468         }else{
469             luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
470                             h->luma_weight[refn0][0][0] , h->luma_weight[refn1][1][0],
471                             h->luma_weight[refn0][0][1] + h->luma_weight[refn1][1][1]);
472             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
473                             h->chroma_weight[refn0][0][0][0] , h->chroma_weight[refn1][1][0][0],
474                             h->chroma_weight[refn0][0][0][1] + h->chroma_weight[refn1][1][0][1]);
475             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
476                             h->chroma_weight[refn0][0][1][0] , h->chroma_weight[refn1][1][1][0],
477                             h->chroma_weight[refn0][0][1][1] + h->chroma_weight[refn1][1][1][1]);
478         }
479     }else{
480         int list = list1 ? 1 : 0;
481         int refn = h->ref_cache[list][ scan8[n] ];
482         Picture *ref= &h->ref_list[list][refn];
483         mc_dir_part(h, ref, n, square, chroma_height, delta, list,
484                     dest_y, dest_cb, dest_cr, x_offset, y_offset,
485                     qpix_put, chroma_put);
486
487         luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
488                        h->luma_weight[refn][list][0], h->luma_weight[refn][list][1]);
489         if(h->use_weight_chroma){
490             chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
491                              h->chroma_weight[refn][list][0][0], h->chroma_weight[refn][list][0][1]);
492             chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
493                              h->chroma_weight[refn][list][1][0], h->chroma_weight[refn][list][1][1]);
494         }
495     }
496 }
497
498 static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
499                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
500                            int x_offset, int y_offset,
501                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
502                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
503                            h264_weight_func *weight_op, h264_biweight_func *weight_avg,
504                            int list0, int list1){
505     if((h->use_weight==2 && list0 && list1
506         && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ][h->s.mb_y&1] != 32))
507        || h->use_weight==1)
508         mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
509                          x_offset, y_offset, qpix_put, chroma_put,
510                          weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
511     else
512         mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
513                     x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
514 }
515
516 static inline void prefetch_motion(H264Context *h, int list){
517     /* fetch pixels for estimated mv 4 macroblocks ahead
518      * optimized for 64byte cache lines */
519     MpegEncContext * const s = &h->s;
520     const int refn = h->ref_cache[list][scan8[0]];
521     if(refn >= 0){
522         const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
523         const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
524         uint8_t **src= h->ref_list[list][refn].data;
525         int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
526         s->dsp.prefetch(src[0]+off, s->linesize, 4);
527         off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
528         s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
529     }
530 }
531
532 static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
533                       qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
534                       qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
535                       h264_weight_func *weight_op, h264_biweight_func *weight_avg){
536     MpegEncContext * const s = &h->s;
537     const int mb_xy= h->mb_xy;
538     const int mb_type= s->current_picture.mb_type[mb_xy];
539
540     assert(IS_INTER(mb_type));
541
542     prefetch_motion(h, 0);
543
544     if(IS_16X16(mb_type)){
545         mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
546                 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
547                 weight_op, weight_avg,
548                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
549     }else if(IS_16X8(mb_type)){
550         mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
551                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
552                 &weight_op[1], &weight_avg[1],
553                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
554         mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
555                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
556                 &weight_op[1], &weight_avg[1],
557                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
558     }else if(IS_8X16(mb_type)){
559         mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
560                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
561                 &weight_op[2], &weight_avg[2],
562                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
563         mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
564                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
565                 &weight_op[2], &weight_avg[2],
566                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
567     }else{
568         int i;
569
570         assert(IS_8X8(mb_type));
571
572         for(i=0; i<4; i++){
573             const int sub_mb_type= h->sub_mb_type[i];
574             const int n= 4*i;
575             int x_offset= (i&1)<<2;
576             int y_offset= (i&2)<<1;
577
578             if(IS_SUB_8X8(sub_mb_type)){
579                 mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
580                     qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
581                     &weight_op[3], &weight_avg[3],
582                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
583             }else if(IS_SUB_8X4(sub_mb_type)){
584                 mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
585                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
586                     &weight_op[4], &weight_avg[4],
587                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
588                 mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
589                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
590                     &weight_op[4], &weight_avg[4],
591                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
592             }else if(IS_SUB_4X8(sub_mb_type)){
593                 mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
594                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
595                     &weight_op[5], &weight_avg[5],
596                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
597                 mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
598                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
599                     &weight_op[5], &weight_avg[5],
600                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
601             }else{
602                 int j;
603                 assert(IS_SUB_4X4(sub_mb_type));
604                 for(j=0; j<4; j++){
605                     int sub_x_offset= x_offset + 2*(j&1);
606                     int sub_y_offset= y_offset +   (j&2);
607                     mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
608                         qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
609                         &weight_op[6], &weight_avg[6],
610                         IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
611                 }
612             }
613         }
614     }
615
616     prefetch_motion(h, 1);
617 }
618
619
620 static void free_tables(H264Context *h, int free_rbsp){
621     int i;
622     H264Context *hx;
623     av_freep(&h->intra4x4_pred_mode);
624     av_freep(&h->chroma_pred_mode_table);
625     av_freep(&h->cbp_table);
626     av_freep(&h->mvd_table[0]);
627     av_freep(&h->mvd_table[1]);
628     av_freep(&h->direct_table);
629     av_freep(&h->non_zero_count);
630     av_freep(&h->slice_table_base);
631     h->slice_table= NULL;
632     av_freep(&h->list_counts);
633
634     av_freep(&h->mb2b_xy);
635     av_freep(&h->mb2br_xy);
636
637     for(i = 0; i < MAX_THREADS; i++) {
638         hx = h->thread_context[i];
639         if(!hx) continue;
640         av_freep(&hx->top_borders[1]);
641         av_freep(&hx->top_borders[0]);
642         av_freep(&hx->s.obmc_scratchpad);
643         if (free_rbsp){
644             av_freep(&hx->rbsp_buffer[1]);
645             av_freep(&hx->rbsp_buffer[0]);
646             hx->rbsp_buffer_size[0] = 0;
647             hx->rbsp_buffer_size[1] = 0;
648         }
649         if (i) av_freep(&h->thread_context[i]);
650     }
651 }
652
653 static void init_dequant8_coeff_table(H264Context *h){
654     int i,q,x;
655     h->dequant8_coeff[0] = h->dequant8_buffer[0];
656     h->dequant8_coeff[1] = h->dequant8_buffer[1];
657
658     for(i=0; i<2; i++ ){
659         if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
660             h->dequant8_coeff[1] = h->dequant8_buffer[0];
661             break;
662         }
663
664         for(q=0; q<52; q++){
665             int shift = div6[q];
666             int idx = rem6[q];
667             for(x=0; x<64; x++)
668                 h->dequant8_coeff[i][q][(x>>3)|((x&7)<<3)] =
669                     ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
670                     h->pps.scaling_matrix8[i][x]) << shift;
671         }
672     }
673 }
674
675 static void init_dequant4_coeff_table(H264Context *h){
676     int i,j,q,x;
677     for(i=0; i<6; i++ ){
678         h->dequant4_coeff[i] = h->dequant4_buffer[i];
679         for(j=0; j<i; j++){
680             if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
681                 h->dequant4_coeff[i] = h->dequant4_buffer[j];
682                 break;
683             }
684         }
685         if(j<i)
686             continue;
687
688         for(q=0; q<52; q++){
689             int shift = div6[q] + 2;
690             int idx = rem6[q];
691             for(x=0; x<16; x++)
692                 h->dequant4_coeff[i][q][(x>>2)|((x<<2)&0xF)] =
693                     ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
694                     h->pps.scaling_matrix4[i][x]) << shift;
695         }
696     }
697 }
698
699 static void init_dequant_tables(H264Context *h){
700     int i,x;
701     init_dequant4_coeff_table(h);
702     if(h->pps.transform_8x8_mode)
703         init_dequant8_coeff_table(h);
704     if(h->sps.transform_bypass){
705         for(i=0; i<6; i++)
706             for(x=0; x<16; x++)
707                 h->dequant4_coeff[i][0][x] = 1<<6;
708         if(h->pps.transform_8x8_mode)
709             for(i=0; i<2; i++)
710                 for(x=0; x<64; x++)
711                     h->dequant8_coeff[i][0][x] = 1<<6;
712     }
713 }
714
715
716 int ff_h264_alloc_tables(H264Context *h){
717     MpegEncContext * const s = &h->s;
718     const int big_mb_num= s->mb_stride * (s->mb_height+1);
719     const int row_mb_num= 2*s->mb_stride*s->avctx->thread_count;
720     int x,y;
721
722     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, row_mb_num * 8  * sizeof(uint8_t), fail)
723
724     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 32 * sizeof(uint8_t), fail)
725     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
726     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
727
728     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
729     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*row_mb_num * sizeof(uint8_t), fail);
730     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*row_mb_num * sizeof(uint8_t), fail);
731     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 4*big_mb_num * sizeof(uint8_t) , fail);
732     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
733
734     memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
735     h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
736
737     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
738     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
739     for(y=0; y<s->mb_height; y++){
740         for(x=0; x<s->mb_width; x++){
741             const int mb_xy= x + y*s->mb_stride;
742             const int b_xy = 4*x + 4*y*h->b_stride;
743
744             h->mb2b_xy [mb_xy]= b_xy;
745             h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
746         }
747     }
748
749     s->obmc_scratchpad = NULL;
750
751     if(!h->dequant4_coeff[0])
752         init_dequant_tables(h);
753
754     return 0;
755 fail:
756     free_tables(h, 1);
757     return -1;
758 }
759
760 /**
761  * Mimic alloc_tables(), but for every context thread.
762  */
763 static void clone_tables(H264Context *dst, H264Context *src, int i){
764     MpegEncContext * const s = &src->s;
765     dst->intra4x4_pred_mode       = src->intra4x4_pred_mode + i*8*2*s->mb_stride;
766     dst->non_zero_count           = src->non_zero_count;
767     dst->slice_table              = src->slice_table;
768     dst->cbp_table                = src->cbp_table;
769     dst->mb2b_xy                  = src->mb2b_xy;
770     dst->mb2br_xy                 = src->mb2br_xy;
771     dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
772     dst->mvd_table[0]             = src->mvd_table[0] + i*8*2*s->mb_stride;
773     dst->mvd_table[1]             = src->mvd_table[1] + i*8*2*s->mb_stride;
774     dst->direct_table             = src->direct_table;
775     dst->list_counts              = src->list_counts;
776
777     dst->s.obmc_scratchpad = NULL;
778     ff_h264_pred_init(&dst->hpc, src->s.codec_id);
779 }
780
781 /**
782  * Init context
783  * Allocate buffers which are not shared amongst multiple threads.
784  */
785 static int context_init(H264Context *h){
786     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
787     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
788
789     h->ref_cache[0][scan8[5 ]+1] = h->ref_cache[0][scan8[7 ]+1] = h->ref_cache[0][scan8[13]+1] =
790     h->ref_cache[1][scan8[5 ]+1] = h->ref_cache[1][scan8[7 ]+1] = h->ref_cache[1][scan8[13]+1] = PART_NOT_AVAILABLE;
791
792     return 0;
793 fail:
794     return -1; // free_tables will clean up for us
795 }
796
797 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
798
799 static av_cold void common_init(H264Context *h){
800     MpegEncContext * const s = &h->s;
801
802     s->width = s->avctx->width;
803     s->height = s->avctx->height;
804     s->codec_id= s->avctx->codec->id;
805
806     ff_h264dsp_init(&h->h264dsp);
807     ff_h264_pred_init(&h->hpc, s->codec_id);
808
809     h->dequant_coeff_pps= -1;
810     s->unrestricted_mv=1;
811     s->decode=1; //FIXME
812
813     dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
814
815     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
816     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
817 }
818
819 int ff_h264_decode_extradata(H264Context *h)
820 {
821     AVCodecContext *avctx = h->s.avctx;
822
823     if(*(char *)avctx->extradata == 1){
824         int i, cnt, nalsize;
825         unsigned char *p = avctx->extradata;
826
827         h->is_avc = 1;
828
829         if(avctx->extradata_size < 7) {
830             av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
831             return -1;
832         }
833         /* sps and pps in the avcC always have length coded with 2 bytes,
834            so put a fake nal_length_size = 2 while parsing them */
835         h->nal_length_size = 2;
836         // Decode sps from avcC
837         cnt = *(p+5) & 0x1f; // Number of sps
838         p += 6;
839         for (i = 0; i < cnt; i++) {
840             nalsize = AV_RB16(p) + 2;
841             if(decode_nal_units(h, p, nalsize) < 0) {
842                 av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
843                 return -1;
844             }
845             p += nalsize;
846         }
847         // Decode pps from avcC
848         cnt = *(p++); // Number of pps
849         for (i = 0; i < cnt; i++) {
850             nalsize = AV_RB16(p) + 2;
851             if(decode_nal_units(h, p, nalsize)  != nalsize) {
852                 av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
853                 return -1;
854             }
855             p += nalsize;
856         }
857         // Now store right nal length size, that will be use to parse all other nals
858         h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
859     } else {
860         h->is_avc = 0;
861         if(decode_nal_units(h, avctx->extradata, avctx->extradata_size) < 0)
862             return -1;
863     }
864     return 0;
865 }
866
867 av_cold int ff_h264_decode_init(AVCodecContext *avctx){
868     H264Context *h= avctx->priv_data;
869     MpegEncContext * const s = &h->s;
870
871     MPV_decode_defaults(s);
872
873     s->avctx = avctx;
874     common_init(h);
875
876     s->out_format = FMT_H264;
877     s->workaround_bugs= avctx->workaround_bugs;
878
879     // set defaults
880 //    s->decode_mb= ff_h263_decode_mb;
881     s->quarter_sample = 1;
882     if(!avctx->has_b_frames)
883     s->low_delay= 1;
884
885     avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
886
887     ff_h264_decode_init_vlc();
888
889     h->thread_context[0] = h;
890     h->outputed_poc = INT_MIN;
891     h->prev_poc_msb= 1<<16;
892     h->x264_build = -1;
893     ff_h264_reset_sei(h);
894     if(avctx->codec_id == CODEC_ID_H264){
895         if(avctx->ticks_per_frame == 1){
896             s->avctx->time_base.den *=2;
897         }
898         avctx->ticks_per_frame = 2;
899     }
900
901     if(avctx->extradata_size > 0 && avctx->extradata &&
902         ff_h264_decode_extradata(h))
903         return -1;
904
905     if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
906         s->avctx->has_b_frames = h->sps.num_reorder_frames;
907         s->low_delay = 0;
908     }
909
910     return 0;
911 }
912
913 int ff_h264_frame_start(H264Context *h){
914     MpegEncContext * const s = &h->s;
915     int i;
916
917     if(MPV_frame_start(s, s->avctx) < 0)
918         return -1;
919     ff_er_frame_start(s);
920     /*
921      * MPV_frame_start uses pict_type to derive key_frame.
922      * This is incorrect for H.264; IDR markings must be used.
923      * Zero here; IDR markings per slice in frame or fields are ORed in later.
924      * See decode_nal_units().
925      */
926     s->current_picture_ptr->key_frame= 0;
927     s->current_picture_ptr->mmco_reset= 0;
928
929     assert(s->linesize && s->uvlinesize);
930
931     for(i=0; i<16; i++){
932         h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
933         h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
934     }
935     for(i=0; i<4; i++){
936         h->block_offset[16+i]=
937         h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
938         h->block_offset[24+16+i]=
939         h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
940     }
941
942     /* can't be in alloc_tables because linesize isn't known there.
943      * FIXME: redo bipred weight to not require extra buffer? */
944     for(i = 0; i < s->avctx->thread_count; i++)
945         if(h->thread_context[i] && !h->thread_context[i]->s.obmc_scratchpad)
946             h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
947
948     /* some macroblocks can be accessed before they're available in case of lost slices, mbaff or threading*/
949     memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
950
951 //    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
952
953     // We mark the current picture as non-reference after allocating it, so
954     // that if we break out due to an error it can be released automatically
955     // in the next MPV_frame_start().
956     // SVQ3 as well as most other codecs have only last/next/current and thus
957     // get released even with set reference, besides SVQ3 and others do not
958     // mark frames as reference later "naturally".
959     if(s->codec_id != CODEC_ID_SVQ3)
960         s->current_picture_ptr->reference= 0;
961
962     s->current_picture_ptr->field_poc[0]=
963     s->current_picture_ptr->field_poc[1]= INT_MAX;
964     assert(s->current_picture_ptr->long_ref==0);
965
966     return 0;
967 }
968
969 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){
970     MpegEncContext * const s = &h->s;
971     uint8_t *top_border;
972     int top_idx = 1;
973
974     src_y  -=   linesize;
975     src_cb -= uvlinesize;
976     src_cr -= uvlinesize;
977
978     if(!simple && FRAME_MBAFF){
979         if(s->mb_y&1){
980             if(!MB_MBAFF){
981                 top_border = h->top_borders[0][s->mb_x];
982                 AV_COPY128(top_border, src_y + 15*linesize);
983                 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
984                     AV_COPY64(top_border+16, src_cb+7*uvlinesize);
985                     AV_COPY64(top_border+24, src_cr+7*uvlinesize);
986                 }
987             }
988         }else if(MB_MBAFF){
989             top_idx = 0;
990         }else
991             return;
992     }
993
994     top_border = h->top_borders[top_idx][s->mb_x];
995     // There are two lines saved, the line above the the top macroblock of a pair,
996     // and the line above the bottom macroblock
997     AV_COPY128(top_border, src_y + 16*linesize);
998
999     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1000         AV_COPY64(top_border+16, src_cb+8*uvlinesize);
1001         AV_COPY64(top_border+24, src_cr+8*uvlinesize);
1002     }
1003 }
1004
1005 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){
1006     MpegEncContext * const s = &h->s;
1007     int deblock_left;
1008     int deblock_top;
1009     int top_idx = 1;
1010     uint8_t *top_border_m1;
1011     uint8_t *top_border;
1012
1013     if(!simple && FRAME_MBAFF){
1014         if(s->mb_y&1){
1015             if(!MB_MBAFF)
1016                 return;
1017         }else{
1018             top_idx = MB_MBAFF ? 0 : 1;
1019         }
1020     }
1021
1022     if(h->deblocking_filter == 2) {
1023         deblock_left = h->left_type[0];
1024         deblock_top  = h->top_type;
1025     } else {
1026         deblock_left = (s->mb_x > 0);
1027         deblock_top =  (s->mb_y > !!MB_FIELD);
1028     }
1029
1030     src_y  -=   linesize + 1;
1031     src_cb -= uvlinesize + 1;
1032     src_cr -= uvlinesize + 1;
1033
1034     top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1035     top_border    = h->top_borders[top_idx][s->mb_x];
1036
1037 #define XCHG(a,b,xchg)\
1038 if (xchg) AV_SWAP64(b,a);\
1039 else      AV_COPY64(b,a);
1040
1041     if(deblock_top){
1042         if(deblock_left){
1043             XCHG(top_border_m1+8, src_y -7, 1);
1044         }
1045         XCHG(top_border+0, src_y +1, xchg);
1046         XCHG(top_border+8, src_y +9, 1);
1047         if(s->mb_x+1 < s->mb_width){
1048             XCHG(h->top_borders[top_idx][s->mb_x+1], src_y +17, 1);
1049         }
1050     }
1051
1052     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1053         if(deblock_top){
1054             if(deblock_left){
1055                 XCHG(top_border_m1+16, src_cb -7, 1);
1056                 XCHG(top_border_m1+24, src_cr -7, 1);
1057             }
1058             XCHG(top_border+16, src_cb+1, 1);
1059             XCHG(top_border+24, src_cr+1, 1);
1060         }
1061     }
1062 }
1063
1064 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
1065     MpegEncContext * const s = &h->s;
1066     const int mb_x= s->mb_x;
1067     const int mb_y= s->mb_y;
1068     const int mb_xy= h->mb_xy;
1069     const int mb_type= s->current_picture.mb_type[mb_xy];
1070     uint8_t  *dest_y, *dest_cb, *dest_cr;
1071     int linesize, uvlinesize /*dct_offset*/;
1072     int i;
1073     int *block_offset = &h->block_offset[0];
1074     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1075     /* is_h264 should always be true if SVQ3 is disabled. */
1076     const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1077     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1078     void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1079
1080     dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
1081     dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
1082     dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
1083
1084     s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
1085     s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
1086
1087     h->list_counts[mb_xy]= h->list_count;
1088
1089     if (!simple && MB_FIELD) {
1090         linesize   = h->mb_linesize   = s->linesize * 2;
1091         uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1092         block_offset = &h->block_offset[24];
1093         if(mb_y&1){ //FIXME move out of this function?
1094             dest_y -= s->linesize*15;
1095             dest_cb-= s->uvlinesize*7;
1096             dest_cr-= s->uvlinesize*7;
1097         }
1098         if(FRAME_MBAFF) {
1099             int list;
1100             for(list=0; list<h->list_count; list++){
1101                 if(!USES_LIST(mb_type, list))
1102                     continue;
1103                 if(IS_16X16(mb_type)){
1104                     int8_t *ref = &h->ref_cache[list][scan8[0]];
1105                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1106                 }else{
1107                     for(i=0; i<16; i+=4){
1108                         int ref = h->ref_cache[list][scan8[i]];
1109                         if(ref >= 0)
1110                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1111                     }
1112                 }
1113             }
1114         }
1115     } else {
1116         linesize   = h->mb_linesize   = s->linesize;
1117         uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1118 //        dct_offset = s->linesize * 16;
1119     }
1120
1121     if (!simple && IS_INTRA_PCM(mb_type)) {
1122         for (i=0; i<16; i++) {
1123             memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1124         }
1125         for (i=0; i<8; i++) {
1126             memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
1127             memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
1128         }
1129     } else {
1130         if(IS_INTRA(mb_type)){
1131             if(h->deblocking_filter)
1132                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
1133
1134             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1135                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1136                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1137             }
1138
1139             if(IS_INTRA4x4(mb_type)){
1140                 if(simple || !s->encoding){
1141                     if(IS_8x8DCT(mb_type)){
1142                         if(transform_bypass){
1143                             idct_dc_add =
1144                             idct_add    = s->dsp.add_pixels8;
1145                         }else{
1146                             idct_dc_add = h->h264dsp.h264_idct8_dc_add;
1147                             idct_add    = h->h264dsp.h264_idct8_add;
1148                         }
1149                         for(i=0; i<16; i+=4){
1150                             uint8_t * const ptr= dest_y + block_offset[i];
1151                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1152                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1153                                 h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
1154                             }else{
1155                                 const int nnz = h->non_zero_count_cache[ scan8[i] ];
1156                                 h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1157                                                             (h->topright_samples_available<<i)&0x4000, linesize);
1158                                 if(nnz){
1159                                     if(nnz == 1 && h->mb[i*16])
1160                                         idct_dc_add(ptr, h->mb + i*16, linesize);
1161                                     else
1162                                         idct_add   (ptr, h->mb + i*16, linesize);
1163                                 }
1164                             }
1165                         }
1166                     }else{
1167                         if(transform_bypass){
1168                             idct_dc_add =
1169                             idct_add    = s->dsp.add_pixels4;
1170                         }else{
1171                             idct_dc_add = h->h264dsp.h264_idct_dc_add;
1172                             idct_add    = h->h264dsp.h264_idct_add;
1173                         }
1174                         for(i=0; i<16; i++){
1175                             uint8_t * const ptr= dest_y + block_offset[i];
1176                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1177
1178                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1179                                 h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
1180                             }else{
1181                                 uint8_t *topright;
1182                                 int nnz, tr;
1183                                 if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1184                                     const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1185                                     assert(mb_y || linesize <= block_offset[i]);
1186                                     if(!topright_avail){
1187                                         tr= ptr[3 - linesize]*0x01010101;
1188                                         topright= (uint8_t*) &tr;
1189                                     }else
1190                                         topright= ptr + 4 - linesize;
1191                                 }else
1192                                     topright= NULL;
1193
1194                                 h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1195                                 nnz = h->non_zero_count_cache[ scan8[i] ];
1196                                 if(nnz){
1197                                     if(is_h264){
1198                                         if(nnz == 1 && h->mb[i*16])
1199                                             idct_dc_add(ptr, h->mb + i*16, linesize);
1200                                         else
1201                                             idct_add   (ptr, h->mb + i*16, linesize);
1202                                     }else
1203                                         ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
1204                                 }
1205                             }
1206                         }
1207                     }
1208                 }
1209             }else{
1210                 h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1211                 if(is_h264){
1212                     if(h->non_zero_count_cache[ scan8[LUMA_DC_BLOCK_INDEX] ]){
1213                         if(!transform_bypass)
1214                             h->h264dsp.h264_luma_dc_dequant_idct(h->mb, h->mb_luma_dc, h->dequant4_coeff[0][s->qscale][0]);
1215                         else{
1216                             static const uint8_t dc_mapping[16] = { 0*16, 1*16, 4*16, 5*16, 2*16, 3*16, 6*16, 7*16,
1217                                                                     8*16, 9*16,12*16,13*16,10*16,11*16,14*16,15*16};
1218                             for(i = 0; i < 16; i++)
1219                                 h->mb[dc_mapping[i]] = h->mb_luma_dc[i];
1220                         }
1221                     }
1222                 }else
1223                     ff_svq3_luma_dc_dequant_idct_c(h->mb, h->mb_luma_dc, s->qscale);
1224             }
1225             if(h->deblocking_filter)
1226                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
1227         }else if(is_h264){
1228             hl_motion(h, dest_y, dest_cb, dest_cr,
1229                       s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1230                       s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1231                       h->h264dsp.weight_h264_pixels_tab, h->h264dsp.biweight_h264_pixels_tab);
1232         }
1233
1234
1235         if(!IS_INTRA4x4(mb_type)){
1236             if(is_h264){
1237                 if(IS_INTRA16x16(mb_type)){
1238                     if(transform_bypass){
1239                         if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1240                             h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
1241                         }else{
1242                             for(i=0; i<16; i++){
1243                                 if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1244                                     s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
1245                             }
1246                         }
1247                     }else{
1248                          h->h264dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1249                     }
1250                 }else if(h->cbp&15){
1251                     if(transform_bypass){
1252                         const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1253                         idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1254                         for(i=0; i<16; i+=di){
1255                             if(h->non_zero_count_cache[ scan8[i] ]){
1256                                 idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
1257                             }
1258                         }
1259                     }else{
1260                         if(IS_8x8DCT(mb_type)){
1261                             h->h264dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1262                         }else{
1263                             h->h264dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1264                         }
1265                     }
1266                 }
1267             }else{
1268                 for(i=0; i<16; i++){
1269                     if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
1270                         uint8_t * const ptr= dest_y + block_offset[i];
1271                         ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1272                     }
1273                 }
1274             }
1275         }
1276
1277         if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1278             uint8_t *dest[2] = {dest_cb, dest_cr};
1279             if(transform_bypass){
1280                 if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1281                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
1282                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
1283                 }else{
1284                     idct_add = s->dsp.add_pixels4;
1285                     for(i=16; i<16+8; i++){
1286                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1287                             idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1288                     }
1289                 }
1290             }else{
1291                 if(is_h264){
1292                     if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+0] ])
1293                         chroma_dc_dequant_idct_c(h->mb + 16*16     , h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
1294                     if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+1] ])
1295                         chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
1296                     h->h264dsp.h264_idct_add8(dest, block_offset,
1297                                               h->mb, uvlinesize,
1298                                               h->non_zero_count_cache);
1299                 }else{
1300                     chroma_dc_dequant_idct_c(h->mb + 16*16     , h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
1301                     chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
1302                     for(i=16; i<16+8; i++){
1303                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1304                             uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
1305                             ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[s->qscale + 12] - 12, 2);
1306                         }
1307                     }
1308                 }
1309             }
1310         }
1311     }
1312     if(h->cbp || IS_INTRA(mb_type))
1313         s->dsp.clear_blocks(h->mb);
1314 }
1315
1316 /**
1317  * Process a macroblock; this case avoids checks for expensive uncommon cases.
1318  */
1319 static void hl_decode_mb_simple(H264Context *h){
1320     hl_decode_mb_internal(h, 1);
1321 }
1322
1323 /**
1324  * Process a macroblock; this handles edge cases, such as interlacing.
1325  */
1326 static void av_noinline hl_decode_mb_complex(H264Context *h){
1327     hl_decode_mb_internal(h, 0);
1328 }
1329
1330 void ff_h264_hl_decode_mb(H264Context *h){
1331     MpegEncContext * const s = &h->s;
1332     const int mb_xy= h->mb_xy;
1333     const int mb_type= s->current_picture.mb_type[mb_xy];
1334     int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
1335
1336     if (is_complex)
1337         hl_decode_mb_complex(h);
1338     else hl_decode_mb_simple(h);
1339 }
1340
1341 static int pred_weight_table(H264Context *h){
1342     MpegEncContext * const s = &h->s;
1343     int list, i;
1344     int luma_def, chroma_def;
1345
1346     h->use_weight= 0;
1347     h->use_weight_chroma= 0;
1348     h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
1349     if(CHROMA)
1350         h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
1351     luma_def = 1<<h->luma_log2_weight_denom;
1352     chroma_def = 1<<h->chroma_log2_weight_denom;
1353
1354     for(list=0; list<2; list++){
1355         h->luma_weight_flag[list]   = 0;
1356         h->chroma_weight_flag[list] = 0;
1357         for(i=0; i<h->ref_count[list]; i++){
1358             int luma_weight_flag, chroma_weight_flag;
1359
1360             luma_weight_flag= get_bits1(&s->gb);
1361             if(luma_weight_flag){
1362                 h->luma_weight[i][list][0]= get_se_golomb(&s->gb);
1363                 h->luma_weight[i][list][1]= get_se_golomb(&s->gb);
1364                 if(   h->luma_weight[i][list][0] != luma_def
1365                    || h->luma_weight[i][list][1] != 0) {
1366                     h->use_weight= 1;
1367                     h->luma_weight_flag[list]= 1;
1368                 }
1369             }else{
1370                 h->luma_weight[i][list][0]= luma_def;
1371                 h->luma_weight[i][list][1]= 0;
1372             }
1373
1374             if(CHROMA){
1375                 chroma_weight_flag= get_bits1(&s->gb);
1376                 if(chroma_weight_flag){
1377                     int j;
1378                     for(j=0; j<2; j++){
1379                         h->chroma_weight[i][list][j][0]= get_se_golomb(&s->gb);
1380                         h->chroma_weight[i][list][j][1]= get_se_golomb(&s->gb);
1381                         if(   h->chroma_weight[i][list][j][0] != chroma_def
1382                            || h->chroma_weight[i][list][j][1] != 0) {
1383                             h->use_weight_chroma= 1;
1384                             h->chroma_weight_flag[list]= 1;
1385                         }
1386                     }
1387                 }else{
1388                     int j;
1389                     for(j=0; j<2; j++){
1390                         h->chroma_weight[i][list][j][0]= chroma_def;
1391                         h->chroma_weight[i][list][j][1]= 0;
1392                     }
1393                 }
1394             }
1395         }
1396         if(h->slice_type_nos != FF_B_TYPE) break;
1397     }
1398     h->use_weight= h->use_weight || h->use_weight_chroma;
1399     return 0;
1400 }
1401
1402 /**
1403  * Initialize implicit_weight table.
1404  * @param field  0/1 initialize the weight for interlaced MBAFF
1405  *                -1 initializes the rest
1406  */
1407 static void implicit_weight_table(H264Context *h, int field){
1408     MpegEncContext * const s = &h->s;
1409     int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
1410
1411     for (i = 0; i < 2; i++) {
1412         h->luma_weight_flag[i]   = 0;
1413         h->chroma_weight_flag[i] = 0;
1414     }
1415
1416     if(field < 0){
1417         cur_poc = s->current_picture_ptr->poc;
1418     if(   h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF
1419        && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
1420         h->use_weight= 0;
1421         h->use_weight_chroma= 0;
1422         return;
1423     }
1424         ref_start= 0;
1425         ref_count0= h->ref_count[0];
1426         ref_count1= h->ref_count[1];
1427     }else{
1428         cur_poc = s->current_picture_ptr->field_poc[field];
1429         ref_start= 16;
1430         ref_count0= 16+2*h->ref_count[0];
1431         ref_count1= 16+2*h->ref_count[1];
1432     }
1433
1434     h->use_weight= 2;
1435     h->use_weight_chroma= 2;
1436     h->luma_log2_weight_denom= 5;
1437     h->chroma_log2_weight_denom= 5;
1438
1439     for(ref0=ref_start; ref0 < ref_count0; ref0++){
1440         int poc0 = h->ref_list[0][ref0].poc;
1441         for(ref1=ref_start; ref1 < ref_count1; ref1++){
1442             int poc1 = h->ref_list[1][ref1].poc;
1443             int td = av_clip(poc1 - poc0, -128, 127);
1444             int w= 32;
1445             if(td){
1446                 int tb = av_clip(cur_poc - poc0, -128, 127);
1447                 int tx = (16384 + (FFABS(td) >> 1)) / td;
1448                 int dist_scale_factor = (tb*tx + 32) >> 8;
1449                 if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
1450                     w = 64 - dist_scale_factor;
1451             }
1452             if(field<0){
1453                 h->implicit_weight[ref0][ref1][0]=
1454                 h->implicit_weight[ref0][ref1][1]= w;
1455             }else{
1456                 h->implicit_weight[ref0][ref1][field]=w;
1457             }
1458         }
1459     }
1460 }
1461
1462 /**
1463  * instantaneous decoder refresh.
1464  */
1465 static void idr(H264Context *h){
1466     ff_h264_remove_all_refs(h);
1467     h->prev_frame_num= 0;
1468     h->prev_frame_num_offset= 0;
1469     h->prev_poc_msb=
1470     h->prev_poc_lsb= 0;
1471 }
1472
1473 /* forget old pics after a seek */
1474 static void flush_dpb(AVCodecContext *avctx){
1475     H264Context *h= avctx->priv_data;
1476     int i;
1477     for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
1478         if(h->delayed_pic[i])
1479             h->delayed_pic[i]->reference= 0;
1480         h->delayed_pic[i]= NULL;
1481     }
1482     h->outputed_poc= INT_MIN;
1483     h->prev_interlaced_frame = 1;
1484     idr(h);
1485     if(h->s.current_picture_ptr)
1486         h->s.current_picture_ptr->reference= 0;
1487     h->s.first_field= 0;
1488     ff_h264_reset_sei(h);
1489     ff_mpeg_flush(avctx);
1490 }
1491
1492 static int init_poc(H264Context *h){
1493     MpegEncContext * const s = &h->s;
1494     const int max_frame_num= 1<<h->sps.log2_max_frame_num;
1495     int field_poc[2];
1496     Picture *cur = s->current_picture_ptr;
1497
1498     h->frame_num_offset= h->prev_frame_num_offset;
1499     if(h->frame_num < h->prev_frame_num)
1500         h->frame_num_offset += max_frame_num;
1501
1502     if(h->sps.poc_type==0){
1503         const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
1504
1505         if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
1506             h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1507         else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
1508             h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1509         else
1510             h->poc_msb = h->prev_poc_msb;
1511 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
1512         field_poc[0] =
1513         field_poc[1] = h->poc_msb + h->poc_lsb;
1514         if(s->picture_structure == PICT_FRAME)
1515             field_poc[1] += h->delta_poc_bottom;
1516     }else if(h->sps.poc_type==1){
1517         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1518         int i;
1519
1520         if(h->sps.poc_cycle_length != 0)
1521             abs_frame_num = h->frame_num_offset + h->frame_num;
1522         else
1523             abs_frame_num = 0;
1524
1525         if(h->nal_ref_idc==0 && abs_frame_num > 0)
1526             abs_frame_num--;
1527
1528         expected_delta_per_poc_cycle = 0;
1529         for(i=0; i < h->sps.poc_cycle_length; i++)
1530             expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
1531
1532         if(abs_frame_num > 0){
1533             int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1534             int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1535
1536             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1537             for(i = 0; i <= frame_num_in_poc_cycle; i++)
1538                 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
1539         } else
1540             expectedpoc = 0;
1541
1542         if(h->nal_ref_idc == 0)
1543             expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1544
1545         field_poc[0] = expectedpoc + h->delta_poc[0];
1546         field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1547
1548         if(s->picture_structure == PICT_FRAME)
1549             field_poc[1] += h->delta_poc[1];
1550     }else{
1551         int poc= 2*(h->frame_num_offset + h->frame_num);
1552
1553         if(!h->nal_ref_idc)
1554             poc--;
1555
1556         field_poc[0]= poc;
1557         field_poc[1]= poc;
1558     }
1559
1560     if(s->picture_structure != PICT_BOTTOM_FIELD)
1561         s->current_picture_ptr->field_poc[0]= field_poc[0];
1562     if(s->picture_structure != PICT_TOP_FIELD)
1563         s->current_picture_ptr->field_poc[1]= field_poc[1];
1564     cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
1565
1566     return 0;
1567 }
1568
1569
1570 /**
1571  * initialize scan tables
1572  */
1573 static void init_scan_tables(H264Context *h){
1574     int i;
1575     for(i=0; i<16; i++){
1576 #define T(x) (x>>2) | ((x<<2) & 0xF)
1577         h->zigzag_scan[i] = T(zigzag_scan[i]);
1578         h-> field_scan[i] = T( field_scan[i]);
1579 #undef T
1580     }
1581     for(i=0; i<64; i++){
1582 #define T(x) (x>>3) | ((x&7)<<3)
1583         h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
1584         h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
1585         h->field_scan8x8[i]        = T(field_scan8x8[i]);
1586         h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
1587 #undef T
1588     }
1589     if(h->sps.transform_bypass){ //FIXME same ugly
1590         h->zigzag_scan_q0          = zigzag_scan;
1591         h->zigzag_scan8x8_q0       = ff_zigzag_direct;
1592         h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
1593         h->field_scan_q0           = field_scan;
1594         h->field_scan8x8_q0        = field_scan8x8;
1595         h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
1596     }else{
1597         h->zigzag_scan_q0          = h->zigzag_scan;
1598         h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
1599         h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
1600         h->field_scan_q0           = h->field_scan;
1601         h->field_scan8x8_q0        = h->field_scan8x8;
1602         h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
1603     }
1604 }
1605
1606 static void field_end(H264Context *h){
1607     MpegEncContext * const s = &h->s;
1608     AVCodecContext * const avctx= s->avctx;
1609     s->mb_y= 0;
1610
1611     s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
1612     s->current_picture_ptr->pict_type= s->pict_type;
1613
1614     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1615         ff_vdpau_h264_set_reference_frames(s);
1616
1617     if(!s->dropable) {
1618         ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1619         h->prev_poc_msb= h->poc_msb;
1620         h->prev_poc_lsb= h->poc_lsb;
1621     }
1622     h->prev_frame_num_offset= h->frame_num_offset;
1623     h->prev_frame_num= h->frame_num;
1624
1625     if (avctx->hwaccel) {
1626         if (avctx->hwaccel->end_frame(avctx) < 0)
1627             av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1628     }
1629
1630     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1631         ff_vdpau_h264_picture_complete(s);
1632
1633     /*
1634      * FIXME: Error handling code does not seem to support interlaced
1635      * when slices span multiple rows
1636      * The ff_er_add_slice calls don't work right for bottom
1637      * fields; they cause massive erroneous error concealing
1638      * Error marking covers both fields (top and bottom).
1639      * This causes a mismatched s->error_count
1640      * and a bad error table. Further, the error count goes to
1641      * INT_MAX when called for bottom field, because mb_y is
1642      * past end by one (callers fault) and resync_mb_y != 0
1643      * causes problems for the first MB line, too.
1644      */
1645     if (!FIELD_PICTURE)
1646         ff_er_frame_end(s);
1647
1648     MPV_frame_end(s);
1649
1650     h->current_slice=0;
1651 }
1652
1653 /**
1654  * Replicate H264 "master" context to thread contexts.
1655  */
1656 static void clone_slice(H264Context *dst, H264Context *src)
1657 {
1658     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
1659     dst->s.current_picture_ptr  = src->s.current_picture_ptr;
1660     dst->s.current_picture      = src->s.current_picture;
1661     dst->s.linesize             = src->s.linesize;
1662     dst->s.uvlinesize           = src->s.uvlinesize;
1663     dst->s.first_field          = src->s.first_field;
1664
1665     dst->prev_poc_msb           = src->prev_poc_msb;
1666     dst->prev_poc_lsb           = src->prev_poc_lsb;
1667     dst->prev_frame_num_offset  = src->prev_frame_num_offset;
1668     dst->prev_frame_num         = src->prev_frame_num;
1669     dst->short_ref_count        = src->short_ref_count;
1670
1671     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
1672     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
1673     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1674     memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
1675
1676     memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
1677     memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
1678 }
1679
1680 /**
1681  * computes profile from profile_idc and constraint_set?_flags
1682  *
1683  * @param sps SPS
1684  *
1685  * @return profile as defined by FF_PROFILE_H264_*
1686  */
1687 int ff_h264_get_profile(SPS *sps)
1688 {
1689     int profile = sps->profile_idc;
1690
1691     switch(sps->profile_idc) {
1692     case FF_PROFILE_H264_BASELINE:
1693         // constraint_set1_flag set to 1
1694         profile |= (sps->constraint_set_flags & 1<<1) ? FF_PROFILE_H264_CONSTRAINED : 0;
1695         break;
1696     case FF_PROFILE_H264_HIGH_10:
1697     case FF_PROFILE_H264_HIGH_422:
1698     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1699         // constraint_set3_flag set to 1
1700         profile |= (sps->constraint_set_flags & 1<<3) ? FF_PROFILE_H264_INTRA : 0;
1701         break;
1702     }
1703
1704     return profile;
1705 }
1706
1707 /**
1708  * decodes a slice header.
1709  * This will also call MPV_common_init() and frame_start() as needed.
1710  *
1711  * @param h h264context
1712  * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
1713  *
1714  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1715  */
1716 static int decode_slice_header(H264Context *h, H264Context *h0){
1717     MpegEncContext * const s = &h->s;
1718     MpegEncContext * const s0 = &h0->s;
1719     unsigned int first_mb_in_slice;
1720     unsigned int pps_id;
1721     int num_ref_idx_active_override_flag;
1722     unsigned int slice_type, tmp, i, j;
1723     int default_ref_list_done = 0;
1724     int last_pic_structure;
1725
1726     s->dropable= h->nal_ref_idc == 0;
1727
1728     if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
1729         s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
1730         s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
1731     }else{
1732         s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
1733         s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
1734     }
1735
1736     first_mb_in_slice= get_ue_golomb(&s->gb);
1737
1738     if(first_mb_in_slice == 0){ //FIXME better field boundary detection
1739         if(h0->current_slice && FIELD_PICTURE){
1740             field_end(h);
1741         }
1742
1743         h0->current_slice = 0;
1744         if (!s0->first_field)
1745             s->current_picture_ptr= NULL;
1746     }
1747
1748     slice_type= get_ue_golomb_31(&s->gb);
1749     if(slice_type > 9){
1750         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);
1751         return -1;
1752     }
1753     if(slice_type > 4){
1754         slice_type -= 5;
1755         h->slice_type_fixed=1;
1756     }else
1757         h->slice_type_fixed=0;
1758
1759     slice_type= golomb_to_pict_type[ slice_type ];
1760     if (slice_type == FF_I_TYPE
1761         || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
1762         default_ref_list_done = 1;
1763     }
1764     h->slice_type= slice_type;
1765     h->slice_type_nos= slice_type & 3;
1766
1767     s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
1768
1769     pps_id= get_ue_golomb(&s->gb);
1770     if(pps_id>=MAX_PPS_COUNT){
1771         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
1772         return -1;
1773     }
1774     if(!h0->pps_buffers[pps_id]) {
1775         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
1776         return -1;
1777     }
1778     h->pps= *h0->pps_buffers[pps_id];
1779
1780     if(!h0->sps_buffers[h->pps.sps_id]) {
1781         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
1782         return -1;
1783     }
1784     h->sps = *h0->sps_buffers[h->pps.sps_id];
1785
1786     s->avctx->profile = ff_h264_get_profile(&h->sps);
1787     s->avctx->level   = h->sps.level_idc;
1788     s->avctx->refs    = h->sps.ref_frame_count;
1789
1790     if(h == h0 && h->dequant_coeff_pps != pps_id){
1791         h->dequant_coeff_pps = pps_id;
1792         init_dequant_tables(h);
1793     }
1794
1795     s->mb_width= h->sps.mb_width;
1796     s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1797
1798     h->b_stride=  s->mb_width*4;
1799
1800     s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
1801     if(h->sps.frame_mbs_only_flag)
1802         s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
1803     else
1804         s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 7);
1805
1806     if (s->context_initialized
1807         && (   s->width != s->avctx->width || s->height != s->avctx->height
1808             || av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
1809         if(h != h0)
1810             return -1;   // width / height changed during parallelized decoding
1811         free_tables(h, 0);
1812         flush_dpb(s->avctx);
1813         MPV_common_end(s);
1814     }
1815     if (!s->context_initialized) {
1816         if(h != h0)
1817             return -1;  // we cant (re-)initialize context during parallel decoding
1818
1819         avcodec_set_dimensions(s->avctx, s->width, s->height);
1820         s->avctx->sample_aspect_ratio= h->sps.sar;
1821         av_assert0(s->avctx->sample_aspect_ratio.den);
1822
1823         if(h->sps.video_signal_type_present_flag){
1824             s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
1825             if(h->sps.colour_description_present_flag){
1826                 s->avctx->color_primaries = h->sps.color_primaries;
1827                 s->avctx->color_trc       = h->sps.color_trc;
1828                 s->avctx->colorspace      = h->sps.colorspace;
1829             }
1830         }
1831
1832         if(h->sps.timing_info_present_flag){
1833             int64_t den= h->sps.time_scale;
1834             if(h->x264_build < 44U)
1835                 den *= 2;
1836             av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
1837                       h->sps.num_units_in_tick, den, 1<<30);
1838         }
1839         s->avctx->pix_fmt = s->avctx->get_format(s->avctx,
1840                                                  s->avctx->codec->pix_fmts ?
1841                                                  s->avctx->codec->pix_fmts :
1842                                                  s->avctx->color_range == AVCOL_RANGE_JPEG ?
1843                                                  hwaccel_pixfmt_list_h264_jpeg_420 :
1844                                                  ff_hwaccel_pixfmt_list_420);
1845         s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
1846
1847         if (MPV_common_init(s) < 0)
1848             return -1;
1849         s->first_field = 0;
1850         h->prev_interlaced_frame = 1;
1851
1852         init_scan_tables(h);
1853         ff_h264_alloc_tables(h);
1854
1855         for(i = 1; i < s->avctx->thread_count; i++) {
1856             H264Context *c;
1857             c = h->thread_context[i] = av_malloc(sizeof(H264Context));
1858             memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
1859             memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
1860             c->h264dsp = h->h264dsp;
1861             c->sps = h->sps;
1862             c->pps = h->pps;
1863             init_scan_tables(c);
1864             clone_tables(c, h, i);
1865         }
1866
1867         for(i = 0; i < s->avctx->thread_count; i++)
1868             if(context_init(h->thread_context[i]) < 0)
1869                 return -1;
1870     }
1871
1872     h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
1873
1874     h->mb_mbaff = 0;
1875     h->mb_aff_frame = 0;
1876     last_pic_structure = s0->picture_structure;
1877     if(h->sps.frame_mbs_only_flag){
1878         s->picture_structure= PICT_FRAME;
1879     }else{
1880         if(get_bits1(&s->gb)) { //field_pic_flag
1881             s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
1882         } else {
1883             s->picture_structure= PICT_FRAME;
1884             h->mb_aff_frame = h->sps.mb_aff;
1885         }
1886     }
1887     h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
1888
1889     if(h0->current_slice == 0){
1890         while(h->frame_num !=  h->prev_frame_num &&
1891               h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
1892             Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1893             av_log(h->s.avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
1894             if (ff_h264_frame_start(h) < 0)
1895                 return -1;
1896             h->prev_frame_num++;
1897             h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
1898             s->current_picture_ptr->frame_num= h->prev_frame_num;
1899             ff_generate_sliding_window_mmcos(h);
1900             ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1901             /* Error concealment: if a ref is missing, copy the previous ref in its place.
1902              * FIXME: avoiding a memcpy would be nice, but ref handling makes many assumptions
1903              * about there being no actual duplicates.
1904              * FIXME: this doesn't copy padding for out-of-frame motion vectors.  Given we're
1905              * concealing a lost frame, this probably isn't noticable by comparison, but it should
1906              * be fixed. */
1907             if (h->short_ref_count) {
1908                 if (prev) {
1909                     av_image_copy(h->short_ref[0]->data, h->short_ref[0]->linesize,
1910                                   (const uint8_t**)prev->data, prev->linesize,
1911                                   s->avctx->pix_fmt, s->mb_width*16, s->mb_height*16);
1912                     h->short_ref[0]->poc = prev->poc+2;
1913                 }
1914                 h->short_ref[0]->frame_num = h->prev_frame_num;
1915             }
1916         }
1917
1918         /* See if we have a decoded first field looking for a pair... */
1919         if (s0->first_field) {
1920             assert(s0->current_picture_ptr);
1921             assert(s0->current_picture_ptr->data[0]);
1922             assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
1923
1924             /* figure out if we have a complementary field pair */
1925             if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
1926                 /*
1927                  * Previous field is unmatched. Don't display it, but let it
1928                  * remain for reference if marked as such.
1929                  */
1930                 s0->current_picture_ptr = NULL;
1931                 s0->first_field = FIELD_PICTURE;
1932
1933             } else {
1934                 if (h->nal_ref_idc &&
1935                         s0->current_picture_ptr->reference &&
1936                         s0->current_picture_ptr->frame_num != h->frame_num) {
1937                     /*
1938                      * This and previous field were reference, but had
1939                      * different frame_nums. Consider this field first in
1940                      * pair. Throw away previous field except for reference
1941                      * purposes.
1942                      */
1943                     s0->first_field = 1;
1944                     s0->current_picture_ptr = NULL;
1945
1946                 } else {
1947                     /* Second field in complementary pair */
1948                     s0->first_field = 0;
1949                 }
1950             }
1951
1952         } else {
1953             /* Frame or first field in a potentially complementary pair */
1954             assert(!s0->current_picture_ptr);
1955             s0->first_field = FIELD_PICTURE;
1956         }
1957
1958         if((!FIELD_PICTURE || s0->first_field) && ff_h264_frame_start(h) < 0) {
1959             s0->first_field = 0;
1960             return -1;
1961         }
1962     }
1963     if(h != h0)
1964         clone_slice(h, h0);
1965
1966     s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
1967
1968     assert(s->mb_num == s->mb_width * s->mb_height);
1969     if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
1970        first_mb_in_slice                    >= s->mb_num){
1971         av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1972         return -1;
1973     }
1974     s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
1975     s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
1976     if (s->picture_structure == PICT_BOTTOM_FIELD)
1977         s->resync_mb_y = s->mb_y = s->mb_y + 1;
1978     assert(s->mb_y < s->mb_height);
1979
1980     if(s->picture_structure==PICT_FRAME){
1981         h->curr_pic_num=   h->frame_num;
1982         h->max_pic_num= 1<< h->sps.log2_max_frame_num;
1983     }else{
1984         h->curr_pic_num= 2*h->frame_num + 1;
1985         h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
1986     }
1987
1988     if(h->nal_unit_type == NAL_IDR_SLICE){
1989         get_ue_golomb(&s->gb); /* idr_pic_id */
1990     }
1991
1992     if(h->sps.poc_type==0){
1993         h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
1994
1995         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
1996             h->delta_poc_bottom= get_se_golomb(&s->gb);
1997         }
1998     }
1999
2000     if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
2001         h->delta_poc[0]= get_se_golomb(&s->gb);
2002
2003         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
2004             h->delta_poc[1]= get_se_golomb(&s->gb);
2005     }
2006
2007     init_poc(h);
2008
2009     if(h->pps.redundant_pic_cnt_present){
2010         h->redundant_pic_count= get_ue_golomb(&s->gb);
2011     }
2012
2013     //set defaults, might be overridden a few lines later
2014     h->ref_count[0]= h->pps.ref_count[0];
2015     h->ref_count[1]= h->pps.ref_count[1];
2016
2017     if(h->slice_type_nos != FF_I_TYPE){
2018         if(h->slice_type_nos == FF_B_TYPE){
2019             h->direct_spatial_mv_pred= get_bits1(&s->gb);
2020         }
2021         num_ref_idx_active_override_flag= get_bits1(&s->gb);
2022
2023         if(num_ref_idx_active_override_flag){
2024             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
2025             if(h->slice_type_nos==FF_B_TYPE)
2026                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
2027
2028             if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
2029                 av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
2030                 h->ref_count[0]= h->ref_count[1]= 1;
2031                 return -1;
2032             }
2033         }
2034         if(h->slice_type_nos == FF_B_TYPE)
2035             h->list_count= 2;
2036         else
2037             h->list_count= 1;
2038     }else
2039         h->list_count= 0;
2040
2041     if(!default_ref_list_done){
2042         ff_h264_fill_default_ref_list(h);
2043     }
2044
2045     if(h->slice_type_nos!=FF_I_TYPE && ff_h264_decode_ref_pic_list_reordering(h) < 0)
2046         return -1;
2047
2048     if(h->slice_type_nos!=FF_I_TYPE){
2049         s->last_picture_ptr= &h->ref_list[0][0];
2050         ff_copy_picture(&s->last_picture, s->last_picture_ptr);
2051     }
2052     if(h->slice_type_nos==FF_B_TYPE){
2053         s->next_picture_ptr= &h->ref_list[1][0];
2054         ff_copy_picture(&s->next_picture, s->next_picture_ptr);
2055     }
2056
2057     if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
2058        ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
2059         pred_weight_table(h);
2060     else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE){
2061         implicit_weight_table(h, -1);
2062     }else {
2063         h->use_weight = 0;
2064         for (i = 0; i < 2; i++) {
2065             h->luma_weight_flag[i]   = 0;
2066             h->chroma_weight_flag[i] = 0;
2067         }
2068     }
2069
2070     if(h->nal_ref_idc)
2071         ff_h264_decode_ref_pic_marking(h0, &s->gb);
2072
2073     if(FRAME_MBAFF){
2074         ff_h264_fill_mbaff_ref_list(h);
2075
2076         if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE){
2077             implicit_weight_table(h, 0);
2078             implicit_weight_table(h, 1);
2079         }
2080     }
2081
2082     if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
2083         ff_h264_direct_dist_scale_factor(h);
2084     ff_h264_direct_ref_list_init(h);
2085
2086     if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
2087         tmp = get_ue_golomb_31(&s->gb);
2088         if(tmp > 2){
2089             av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
2090             return -1;
2091         }
2092         h->cabac_init_idc= tmp;
2093     }
2094
2095     h->last_qscale_diff = 0;
2096     tmp = h->pps.init_qp + get_se_golomb(&s->gb);
2097     if(tmp>51){
2098         av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
2099         return -1;
2100     }
2101     s->qscale= tmp;
2102     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2103     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2104     //FIXME qscale / qp ... stuff
2105     if(h->slice_type == FF_SP_TYPE){
2106         get_bits1(&s->gb); /* sp_for_switch_flag */
2107     }
2108     if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
2109         get_se_golomb(&s->gb); /* slice_qs_delta */
2110     }
2111
2112     h->deblocking_filter = 1;
2113     h->slice_alpha_c0_offset = 52;
2114     h->slice_beta_offset = 52;
2115     if( h->pps.deblocking_filter_parameters_present ) {
2116         tmp= get_ue_golomb_31(&s->gb);
2117         if(tmp > 2){
2118             av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
2119             return -1;
2120         }
2121         h->deblocking_filter= tmp;
2122         if(h->deblocking_filter < 2)
2123             h->deblocking_filter^= 1; // 1<->0
2124
2125         if( h->deblocking_filter ) {
2126             h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
2127             h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
2128             if(   h->slice_alpha_c0_offset > 104U
2129                || h->slice_beta_offset     > 104U){
2130                 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);
2131                 return -1;
2132             }
2133         }
2134     }
2135
2136     if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
2137        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
2138        ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
2139        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2140         h->deblocking_filter= 0;
2141
2142     if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
2143         if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
2144             /* Cheat slightly for speed:
2145                Do not bother to deblock across slices. */
2146             h->deblocking_filter = 2;
2147         } else {
2148             h0->max_contexts = 1;
2149             if(!h0->single_decode_warning) {
2150                 av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
2151                 h0->single_decode_warning = 1;
2152             }
2153             if(h != h0)
2154                 return 1; // deblocking switched inside frame
2155         }
2156     }
2157     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]);
2158
2159 #if 0 //FMO
2160     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
2161         slice_group_change_cycle= get_bits(&s->gb, ?);
2162 #endif
2163
2164     h0->last_slice_type = slice_type;
2165     h->slice_num = ++h0->current_slice;
2166     if(h->slice_num >= MAX_SLICES){
2167         av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
2168     }
2169
2170     for(j=0; j<2; j++){
2171         int id_list[16];
2172         int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
2173         for(i=0; i<16; i++){
2174             id_list[i]= 60;
2175             if(h->ref_list[j][i].data[0]){
2176                 int k;
2177                 uint8_t *base= h->ref_list[j][i].base[0];
2178                 for(k=0; k<h->short_ref_count; k++)
2179                     if(h->short_ref[k]->base[0] == base){
2180                         id_list[i]= k;
2181                         break;
2182                     }
2183                 for(k=0; k<h->long_ref_count; k++)
2184                     if(h->long_ref[k] && h->long_ref[k]->base[0] == base){
2185                         id_list[i]= h->short_ref_count + k;
2186                         break;
2187                     }
2188             }
2189         }
2190
2191         ref2frm[0]=
2192         ref2frm[1]= -1;
2193         for(i=0; i<16; i++)
2194             ref2frm[i+2]= 4*id_list[i]
2195                           +(h->ref_list[j][i].reference&3);
2196         ref2frm[18+0]=
2197         ref2frm[18+1]= -1;
2198         for(i=16; i<48; i++)
2199             ref2frm[i+4]= 4*id_list[(i-16)>>1]
2200                           +(h->ref_list[j][i].reference&3);
2201     }
2202
2203     h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
2204     h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
2205
2206     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2207         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",
2208                h->slice_num,
2209                (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
2210                first_mb_in_slice,
2211                av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
2212                pps_id, h->frame_num,
2213                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
2214                h->ref_count[0], h->ref_count[1],
2215                s->qscale,
2216                h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
2217                h->use_weight,
2218                h->use_weight==1 && h->use_weight_chroma ? "c" : "",
2219                h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
2220                );
2221     }
2222
2223     return 0;
2224 }
2225
2226 int ff_h264_get_slice_type(const H264Context *h)
2227 {
2228     switch (h->slice_type) {
2229     case FF_P_TYPE:  return 0;
2230     case FF_B_TYPE:  return 1;
2231     case FF_I_TYPE:  return 2;
2232     case FF_SP_TYPE: return 3;
2233     case FF_SI_TYPE: return 4;
2234     default:         return -1;
2235     }
2236 }
2237
2238 /**
2239  *
2240  * @return non zero if the loop filter can be skiped
2241  */
2242 static int fill_filter_caches(H264Context *h, int mb_type){
2243     MpegEncContext * const s = &h->s;
2244     const int mb_xy= h->mb_xy;
2245     int top_xy, left_xy[2];
2246     int top_type, left_type[2];
2247
2248     top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
2249
2250     //FIXME deblocking could skip the intra and nnz parts.
2251
2252     /* Wow, what a mess, why didn't they simplify the interlacing & intra
2253      * stuff, I can't imagine that these complex rules are worth it. */
2254
2255     left_xy[1] = left_xy[0] = mb_xy-1;
2256     if(FRAME_MBAFF){
2257         const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
2258         const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
2259         if(s->mb_y&1){
2260             if (left_mb_field_flag != curr_mb_field_flag) {
2261                 left_xy[0] -= s->mb_stride;
2262             }
2263         }else{
2264             if(curr_mb_field_flag){
2265                 top_xy      += s->mb_stride & (((s->current_picture.mb_type[top_xy    ]>>7)&1)-1);
2266             }
2267             if (left_mb_field_flag != curr_mb_field_flag) {
2268                 left_xy[1] += s->mb_stride;
2269             }
2270         }
2271     }
2272
2273     h->top_mb_xy = top_xy;
2274     h->left_mb_xy[0] = left_xy[0];
2275     h->left_mb_xy[1] = left_xy[1];
2276     {
2277         //for sufficiently low qp, filtering wouldn't do anything
2278         //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
2279         int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
2280         int qp = s->current_picture.qscale_table[mb_xy];
2281         if(qp <= qp_thresh
2282            && (left_xy[0]<0 || ((qp + s->current_picture.qscale_table[left_xy[0]] + 1)>>1) <= qp_thresh)
2283            && (top_xy   < 0 || ((qp + s->current_picture.qscale_table[top_xy    ] + 1)>>1) <= qp_thresh)){
2284             if(!FRAME_MBAFF)
2285                 return 1;
2286             if(   (left_xy[0]< 0            || ((qp + s->current_picture.qscale_table[left_xy[1]             ] + 1)>>1) <= qp_thresh)
2287                && (top_xy    < s->mb_stride || ((qp + s->current_picture.qscale_table[top_xy    -s->mb_stride] + 1)>>1) <= qp_thresh))
2288                 return 1;
2289         }
2290     }
2291
2292     top_type     = s->current_picture.mb_type[top_xy]    ;
2293     left_type[0] = s->current_picture.mb_type[left_xy[0]];
2294     left_type[1] = s->current_picture.mb_type[left_xy[1]];
2295     if(h->deblocking_filter == 2){
2296         if(h->slice_table[top_xy     ] != h->slice_num) top_type= 0;
2297         if(h->slice_table[left_xy[0] ] != h->slice_num) left_type[0]= left_type[1]= 0;
2298     }else{
2299         if(h->slice_table[top_xy     ] == 0xFFFF) top_type= 0;
2300         if(h->slice_table[left_xy[0] ] == 0xFFFF) left_type[0]= left_type[1] =0;
2301     }
2302     h->top_type    = top_type    ;
2303     h->left_type[0]= left_type[0];
2304     h->left_type[1]= left_type[1];
2305
2306     if(IS_INTRA(mb_type))
2307         return 0;
2308
2309     AV_COPY64(&h->non_zero_count_cache[0+8*1], &h->non_zero_count[mb_xy][ 0]);
2310     AV_COPY64(&h->non_zero_count_cache[0+8*2], &h->non_zero_count[mb_xy][ 8]);
2311     AV_COPY32(&h->non_zero_count_cache[0+8*5], &h->non_zero_count[mb_xy][16]);
2312     AV_COPY32(&h->non_zero_count_cache[4+8*3], &h->non_zero_count[mb_xy][20]);
2313     AV_COPY64(&h->non_zero_count_cache[0+8*4], &h->non_zero_count[mb_xy][24]);
2314
2315     h->cbp= h->cbp_table[mb_xy];
2316
2317     {
2318         int list;
2319         for(list=0; list<h->list_count; list++){
2320             int8_t *ref;
2321             int y, b_stride;
2322             int16_t (*mv_dst)[2];
2323             int16_t (*mv_src)[2];
2324
2325             if(!USES_LIST(mb_type, list)){
2326                 fill_rectangle(  h->mv_cache[list][scan8[0]], 4, 4, 8, pack16to32(0,0), 4);
2327                 AV_WN32A(&h->ref_cache[list][scan8[ 0]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2328                 AV_WN32A(&h->ref_cache[list][scan8[ 2]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2329                 AV_WN32A(&h->ref_cache[list][scan8[ 8]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2330                 AV_WN32A(&h->ref_cache[list][scan8[10]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2331                 continue;
2332             }
2333
2334             ref = &s->current_picture.ref_index[list][4*mb_xy];
2335             {
2336                 int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2337                 AV_WN32A(&h->ref_cache[list][scan8[ 0]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2338                 AV_WN32A(&h->ref_cache[list][scan8[ 2]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2339                 ref += 2;
2340                 AV_WN32A(&h->ref_cache[list][scan8[ 8]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2341                 AV_WN32A(&h->ref_cache[list][scan8[10]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2342             }
2343
2344             b_stride = h->b_stride;
2345             mv_dst   = &h->mv_cache[list][scan8[0]];
2346             mv_src   = &s->current_picture.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
2347             for(y=0; y<4; y++){
2348                 AV_COPY128(mv_dst + 8*y, mv_src + y*b_stride);
2349             }
2350
2351         }
2352     }
2353
2354
2355 /*
2356 0 . T T. T T T T
2357 1 L . .L . . . .
2358 2 L . .L . . . .
2359 3 . T TL . . . .
2360 4 L . .L . . . .
2361 5 L . .. . . . .
2362 */
2363 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
2364     if(top_type){
2365         AV_COPY32(&h->non_zero_count_cache[4+8*0], &h->non_zero_count[top_xy][4+3*8]);
2366     }
2367
2368     if(left_type[0]){
2369         h->non_zero_count_cache[3+8*1]= h->non_zero_count[left_xy[0]][7+0*8];
2370         h->non_zero_count_cache[3+8*2]= h->non_zero_count[left_xy[0]][7+1*8];
2371         h->non_zero_count_cache[3+8*3]= h->non_zero_count[left_xy[0]][7+2*8];
2372         h->non_zero_count_cache[3+8*4]= h->non_zero_count[left_xy[0]][7+3*8];
2373     }
2374
2375     // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
2376     if(!CABAC && h->pps.transform_8x8_mode){
2377         if(IS_8x8DCT(top_type)){
2378             h->non_zero_count_cache[4+8*0]=
2379             h->non_zero_count_cache[5+8*0]= h->cbp_table[top_xy] & 4;
2380             h->non_zero_count_cache[6+8*0]=
2381             h->non_zero_count_cache[7+8*0]= h->cbp_table[top_xy] & 8;
2382         }
2383         if(IS_8x8DCT(left_type[0])){
2384             h->non_zero_count_cache[3+8*1]=
2385             h->non_zero_count_cache[3+8*2]= h->cbp_table[left_xy[0]]&2; //FIXME check MBAFF
2386         }
2387         if(IS_8x8DCT(left_type[1])){
2388             h->non_zero_count_cache[3+8*3]=
2389             h->non_zero_count_cache[3+8*4]= h->cbp_table[left_xy[1]]&8; //FIXME check MBAFF
2390         }
2391
2392         if(IS_8x8DCT(mb_type)){
2393             h->non_zero_count_cache[scan8[0   ]]= h->non_zero_count_cache[scan8[1   ]]=
2394             h->non_zero_count_cache[scan8[2   ]]= h->non_zero_count_cache[scan8[3   ]]= h->cbp & 1;
2395
2396             h->non_zero_count_cache[scan8[0+ 4]]= h->non_zero_count_cache[scan8[1+ 4]]=
2397             h->non_zero_count_cache[scan8[2+ 4]]= h->non_zero_count_cache[scan8[3+ 4]]= h->cbp & 2;
2398
2399             h->non_zero_count_cache[scan8[0+ 8]]= h->non_zero_count_cache[scan8[1+ 8]]=
2400             h->non_zero_count_cache[scan8[2+ 8]]= h->non_zero_count_cache[scan8[3+ 8]]= h->cbp & 4;
2401
2402             h->non_zero_count_cache[scan8[0+12]]= h->non_zero_count_cache[scan8[1+12]]=
2403             h->non_zero_count_cache[scan8[2+12]]= h->non_zero_count_cache[scan8[3+12]]= h->cbp & 8;
2404         }
2405     }
2406
2407     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
2408         int list;
2409         for(list=0; list<h->list_count; list++){
2410             if(USES_LIST(top_type, list)){
2411                 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
2412                 const int b8_xy= 4*top_xy + 2;
2413                 int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2414                 AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
2415                 h->ref_cache[list][scan8[0] + 0 - 1*8]=
2416                 h->ref_cache[list][scan8[0] + 1 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 0]];
2417                 h->ref_cache[list][scan8[0] + 2 - 1*8]=
2418                 h->ref_cache[list][scan8[0] + 3 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 1]];
2419             }else{
2420                 AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
2421                 AV_WN32A(&h->ref_cache[list][scan8[0] + 0 - 1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2422             }
2423
2424             if(!IS_INTERLACED(mb_type^left_type[0])){
2425                 if(USES_LIST(left_type[0], list)){
2426                     const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
2427                     const int b8_xy= 4*left_xy[0] + 1;
2428                     int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[0]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2429                     AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 0 ], s->current_picture.motion_val[list][b_xy + h->b_stride*0]);
2430                     AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 8 ], s->current_picture.motion_val[list][b_xy + h->b_stride*1]);
2431                     AV_COPY32(h->mv_cache[list][scan8[0] - 1 +16 ], s->current_picture.motion_val[list][b_xy + h->b_stride*2]);
2432                     AV_COPY32(h->mv_cache[list][scan8[0] - 1 +24 ], s->current_picture.motion_val[list][b_xy + h->b_stride*3]);
2433                     h->ref_cache[list][scan8[0] - 1 + 0 ]=
2434                     h->ref_cache[list][scan8[0] - 1 + 8 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*0]];
2435                     h->ref_cache[list][scan8[0] - 1 +16 ]=
2436                     h->ref_cache[list][scan8[0] - 1 +24 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*1]];
2437                 }else{
2438                     AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 0 ]);
2439                     AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 8 ]);
2440                     AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +16 ]);
2441                     AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +24 ]);
2442                     h->ref_cache[list][scan8[0] - 1 + 0  ]=
2443                     h->ref_cache[list][scan8[0] - 1 + 8  ]=
2444                     h->ref_cache[list][scan8[0] - 1 + 16 ]=
2445                     h->ref_cache[list][scan8[0] - 1 + 24 ]= LIST_NOT_USED;
2446                 }
2447             }
2448         }
2449     }
2450
2451     return 0;
2452 }
2453
2454 static void loop_filter(H264Context *h){
2455     MpegEncContext * const s = &h->s;
2456     uint8_t  *dest_y, *dest_cb, *dest_cr;
2457     int linesize, uvlinesize, mb_x, mb_y;
2458     const int end_mb_y= s->mb_y + FRAME_MBAFF;
2459     const int old_slice_type= h->slice_type;
2460
2461     if(h->deblocking_filter) {
2462         for(mb_x= 0; mb_x<s->mb_width; mb_x++){
2463             for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
2464                 int mb_xy, mb_type;
2465                 mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
2466                 h->slice_num= h->slice_table[mb_xy];
2467                 mb_type= s->current_picture.mb_type[mb_xy];
2468                 h->list_count= h->list_counts[mb_xy];
2469
2470                 if(FRAME_MBAFF)
2471                     h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2472
2473                 s->mb_x= mb_x;
2474                 s->mb_y= mb_y;
2475                 dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2476                 dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2477                 dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2478                     //FIXME simplify above
2479
2480                 if (MB_FIELD) {
2481                     linesize   = h->mb_linesize   = s->linesize * 2;
2482                     uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2483                     if(mb_y&1){ //FIXME move out of this function?
2484                         dest_y -= s->linesize*15;
2485                         dest_cb-= s->uvlinesize*7;
2486                         dest_cr-= s->uvlinesize*7;
2487                     }
2488                 } else {
2489                     linesize   = h->mb_linesize   = s->linesize;
2490                     uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2491                 }
2492                 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
2493                 if(fill_filter_caches(h, mb_type))
2494                     continue;
2495                 h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2496                 h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2497
2498                 if (FRAME_MBAFF) {
2499                     ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2500                 } else {
2501                     ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2502                 }
2503             }
2504         }
2505     }
2506     h->slice_type= old_slice_type;
2507     s->mb_x= 0;
2508     s->mb_y= end_mb_y - FRAME_MBAFF;
2509     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2510     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2511 }
2512
2513 static void predict_field_decoding_flag(H264Context *h){
2514     MpegEncContext * const s = &h->s;
2515     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
2516     int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
2517                 ? s->current_picture.mb_type[mb_xy-1]
2518                 : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
2519                 ? s->current_picture.mb_type[mb_xy-s->mb_stride]
2520                 : 0;
2521     h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2522 }
2523
2524 static int decode_slice(struct AVCodecContext *avctx, void *arg){
2525     H264Context *h = *(void**)arg;
2526     MpegEncContext * const s = &h->s;
2527     const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
2528
2529     s->mb_skip_run= -1;
2530
2531     h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
2532                     (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
2533
2534     if( h->pps.cabac ) {
2535         /* realign */
2536         align_get_bits( &s->gb );
2537
2538         /* init cabac */
2539         ff_init_cabac_states( &h->cabac);
2540         ff_init_cabac_decoder( &h->cabac,
2541                                s->gb.buffer + get_bits_count(&s->gb)/8,
2542                                (get_bits_left(&s->gb) + 7)/8);
2543
2544         ff_h264_init_cabac_states(h);
2545
2546         for(;;){
2547 //START_TIMER
2548             int ret = ff_h264_decode_mb_cabac(h);
2549             int eos;
2550 //STOP_TIMER("decode_mb_cabac")
2551
2552             if(ret>=0) ff_h264_hl_decode_mb(h);
2553
2554             if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
2555                 s->mb_y++;
2556
2557                 ret = ff_h264_decode_mb_cabac(h);
2558
2559                 if(ret>=0) ff_h264_hl_decode_mb(h);
2560                 s->mb_y--;
2561             }
2562             eos = get_cabac_terminate( &h->cabac );
2563
2564             if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
2565                 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);
2566                 return 0;
2567             }
2568             if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2569                 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);
2570                 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);
2571                 return -1;
2572             }
2573
2574             if( ++s->mb_x >= s->mb_width ) {
2575                 s->mb_x = 0;
2576                 loop_filter(h);
2577                 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2578                 ++s->mb_y;
2579                 if(FIELD_OR_MBAFF_PICTURE) {
2580                     ++s->mb_y;
2581                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
2582                         predict_field_decoding_flag(h);
2583                 }
2584             }
2585
2586             if( eos || s->mb_y >= s->mb_height ) {
2587                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2588                 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);
2589                 return 0;
2590             }
2591         }
2592
2593     } else {
2594         for(;;){
2595             int ret = ff_h264_decode_mb_cavlc(h);
2596
2597             if(ret>=0) ff_h264_hl_decode_mb(h);
2598
2599             if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
2600                 s->mb_y++;
2601                 ret = ff_h264_decode_mb_cavlc(h);
2602
2603                 if(ret>=0) ff_h264_hl_decode_mb(h);
2604                 s->mb_y--;
2605             }
2606
2607             if(ret<0){
2608                 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2609                 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);
2610
2611                 return -1;
2612             }
2613
2614             if(++s->mb_x >= s->mb_width){
2615                 s->mb_x=0;
2616                 loop_filter(h);
2617                 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2618                 ++s->mb_y;
2619                 if(FIELD_OR_MBAFF_PICTURE) {
2620                     ++s->mb_y;
2621                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
2622                         predict_field_decoding_flag(h);
2623                 }
2624                 if(s->mb_y >= s->mb_height){
2625                     tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2626
2627                     if(get_bits_count(&s->gb) == s->gb.size_in_bits ) {
2628                         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);
2629
2630                         return 0;
2631                     }else{
2632                         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);
2633
2634                         return -1;
2635                     }
2636                 }
2637             }
2638
2639             if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
2640                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2641                 if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
2642                     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);
2643
2644                     return 0;
2645                 }else{
2646                     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);
2647
2648                     return -1;
2649                 }
2650             }
2651         }
2652     }
2653
2654 #if 0
2655     for(;s->mb_y < s->mb_height; s->mb_y++){
2656         for(;s->mb_x < s->mb_width; s->mb_x++){
2657             int ret= decode_mb(h);
2658
2659             ff_h264_hl_decode_mb(h);
2660
2661             if(ret<0){
2662                 av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2663                 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);
2664
2665                 return -1;
2666             }
2667
2668             if(++s->mb_x >= s->mb_width){
2669                 s->mb_x=0;
2670                 if(++s->mb_y >= s->mb_height){
2671                     if(get_bits_count(s->gb) == s->gb.size_in_bits){
2672                         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);
2673
2674                         return 0;
2675                     }else{
2676                         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);
2677
2678                         return -1;
2679                     }
2680                 }
2681             }
2682
2683             if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
2684                 if(get_bits_count(s->gb) == s->gb.size_in_bits){
2685                     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);
2686
2687                     return 0;
2688                 }else{
2689                     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);
2690
2691                     return -1;
2692                 }
2693             }
2694         }
2695         s->mb_x=0;
2696         ff_draw_horiz_band(s, 16*s->mb_y, 16);
2697     }
2698 #endif
2699     return -1; //not reached
2700 }
2701
2702 /**
2703  * Call decode_slice() for each context.
2704  *
2705  * @param h h264 master context
2706  * @param context_count number of contexts to execute
2707  */
2708 static void execute_decode_slices(H264Context *h, int context_count){
2709     MpegEncContext * const s = &h->s;
2710     AVCodecContext * const avctx= s->avctx;
2711     H264Context *hx;
2712     int i;
2713
2714     if (s->avctx->hwaccel)
2715         return;
2716     if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2717         return;
2718     if(context_count == 1) {
2719         decode_slice(avctx, &h);
2720     } else {
2721         for(i = 1; i < context_count; i++) {
2722             hx = h->thread_context[i];
2723             hx->s.error_recognition = avctx->error_recognition;
2724             hx->s.error_count = 0;
2725         }
2726
2727         avctx->execute(avctx, (void *)decode_slice,
2728                        h->thread_context, NULL, context_count, sizeof(void*));
2729
2730         /* pull back stuff from slices to master context */
2731         hx = h->thread_context[context_count - 1];
2732         s->mb_x = hx->s.mb_x;
2733         s->mb_y = hx->s.mb_y;
2734         s->dropable = hx->s.dropable;
2735         s->picture_structure = hx->s.picture_structure;
2736         for(i = 1; i < context_count; i++)
2737             h->s.error_count += h->thread_context[i]->s.error_count;
2738     }
2739 }
2740
2741
2742 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
2743     MpegEncContext * const s = &h->s;
2744     AVCodecContext * const avctx= s->avctx;
2745     int buf_index=0;
2746     H264Context *hx; ///< thread context
2747     int context_count = 0;
2748     int next_avc= h->is_avc ? 0 : buf_size;
2749
2750     h->max_contexts = avctx->thread_count;
2751 #if 0
2752     int i;
2753     for(i=0; i<50; i++){
2754         av_log(NULL, AV_LOG_ERROR,"%02X ", buf[i]);
2755     }
2756 #endif
2757     if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
2758         h->current_slice = 0;
2759         if (!s->first_field)
2760             s->current_picture_ptr= NULL;
2761         ff_h264_reset_sei(h);
2762     }
2763
2764     for(;;){
2765         int consumed;
2766         int dst_length;
2767         int bit_length;
2768         const uint8_t *ptr;
2769         int i, nalsize = 0;
2770         int err;
2771
2772         if(buf_index >= next_avc) {
2773             if(buf_index >= buf_size) break;
2774             nalsize = 0;
2775             for(i = 0; i < h->nal_length_size; i++)
2776                 nalsize = (nalsize << 8) | buf[buf_index++];
2777             if(nalsize <= 0 || nalsize > buf_size - buf_index){
2778                 av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
2779                 break;
2780             }
2781             next_avc= buf_index + nalsize;
2782         } else {
2783             // start code prefix search
2784             for(; buf_index + 3 < next_avc; buf_index++){
2785                 // This should always succeed in the first iteration.
2786                 if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
2787                     break;
2788             }
2789
2790             if(buf_index+3 >= buf_size) break;
2791
2792             buf_index+=3;
2793             if(buf_index >= next_avc) continue;
2794         }
2795
2796         hx = h->thread_context[context_count];
2797
2798         ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
2799         if (ptr==NULL || dst_length < 0){
2800             return -1;
2801         }
2802         i= buf_index + consumed;
2803         if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
2804            buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
2805             s->workaround_bugs |= FF_BUG_TRUNCATED;
2806
2807         if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
2808         while(ptr[dst_length - 1] == 0 && dst_length > 0)
2809             dst_length--;
2810         }
2811         bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
2812
2813         if(s->avctx->debug&FF_DEBUG_STARTCODE){
2814             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);
2815         }
2816
2817         if (h->is_avc && (nalsize != consumed) && nalsize){
2818             av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
2819         }
2820
2821         buf_index += consumed;
2822
2823         if(  (s->hurry_up == 1 && h->nal_ref_idc  == 0) //FIXME do not discard SEI id
2824            ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0))
2825             continue;
2826
2827       again:
2828         err = 0;
2829         switch(hx->nal_unit_type){
2830         case NAL_IDR_SLICE:
2831             if (h->nal_unit_type != NAL_IDR_SLICE) {
2832                 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
2833                 return -1;
2834             }
2835             idr(h); //FIXME ensure we don't loose some frames if there is reordering
2836         case NAL_SLICE:
2837             init_get_bits(&hx->s.gb, ptr, bit_length);
2838             hx->intra_gb_ptr=
2839             hx->inter_gb_ptr= &hx->s.gb;
2840             hx->s.data_partitioning = 0;
2841
2842             if((err = decode_slice_header(hx, h)))
2843                break;
2844
2845             if (h->current_slice == 1) {
2846                 if (s->avctx->hwaccel && s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
2847                     return -1;
2848                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2849                     ff_vdpau_h264_picture_start(s);
2850             }
2851
2852             s->current_picture_ptr->key_frame |=
2853                     (hx->nal_unit_type == NAL_IDR_SLICE) ||
2854                     (h->sei_recovery_frame_cnt >= 0);
2855             if(hx->redundant_pic_count==0 && hx->s.hurry_up < 5
2856                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2857                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2858                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2859                && avctx->skip_frame < AVDISCARD_ALL){
2860                 if(avctx->hwaccel) {
2861                     if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
2862                         return -1;
2863                 }else
2864                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
2865                     static const uint8_t start_code[] = {0x00, 0x00, 0x01};
2866                     ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
2867                     ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
2868                 }else
2869                     context_count++;
2870             }
2871             break;
2872         case NAL_DPA:
2873             init_get_bits(&hx->s.gb, ptr, bit_length);
2874             hx->intra_gb_ptr=
2875             hx->inter_gb_ptr= NULL;
2876
2877             if ((err = decode_slice_header(hx, h)) < 0)
2878                 break;
2879
2880             hx->s.data_partitioning = 1;
2881
2882             break;
2883         case NAL_DPB:
2884             init_get_bits(&hx->intra_gb, ptr, bit_length);
2885             hx->intra_gb_ptr= &hx->intra_gb;
2886             break;
2887         case NAL_DPC:
2888             init_get_bits(&hx->inter_gb, ptr, bit_length);
2889             hx->inter_gb_ptr= &hx->inter_gb;
2890
2891             if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
2892                && s->context_initialized
2893                && s->hurry_up < 5
2894                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2895                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2896                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2897                && avctx->skip_frame < AVDISCARD_ALL)
2898                 context_count++;
2899             break;
2900         case NAL_SEI:
2901             init_get_bits(&s->gb, ptr, bit_length);
2902             ff_h264_decode_sei(h);
2903             break;
2904         case NAL_SPS:
2905             init_get_bits(&s->gb, ptr, bit_length);
2906             ff_h264_decode_seq_parameter_set(h);
2907
2908             if(s->flags& CODEC_FLAG_LOW_DELAY)
2909                 s->low_delay=1;
2910
2911             if(avctx->has_b_frames < 2)
2912                 avctx->has_b_frames= !s->low_delay;
2913             break;
2914         case NAL_PPS:
2915             init_get_bits(&s->gb, ptr, bit_length);
2916
2917             ff_h264_decode_picture_parameter_set(h, bit_length);
2918
2919             break;
2920         case NAL_AUD:
2921         case NAL_END_SEQUENCE:
2922         case NAL_END_STREAM:
2923         case NAL_FILLER_DATA:
2924         case NAL_SPS_EXT:
2925         case NAL_AUXILIARY_SLICE:
2926             break;
2927         default:
2928             av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
2929         }
2930
2931         if(context_count == h->max_contexts) {
2932             execute_decode_slices(h, context_count);
2933             context_count = 0;
2934         }
2935
2936         if (err < 0)
2937             av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
2938         else if(err == 1) {
2939             /* Slice could not be decoded in parallel mode, copy down
2940              * NAL unit stuff to context 0 and restart. Note that
2941              * rbsp_buffer is not transferred, but since we no longer
2942              * run in parallel mode this should not be an issue. */
2943             h->nal_unit_type = hx->nal_unit_type;
2944             h->nal_ref_idc   = hx->nal_ref_idc;
2945             hx = h;
2946             goto again;
2947         }
2948     }
2949     if(context_count)
2950         execute_decode_slices(h, context_count);
2951     return buf_index;
2952 }
2953
2954 /**
2955  * returns the number of bytes consumed for building the current frame
2956  */
2957 static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
2958         if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
2959         if(pos+10>buf_size) pos=buf_size; // oops ;)
2960
2961         return pos;
2962 }
2963
2964 static int decode_frame(AVCodecContext *avctx,
2965                              void *data, int *data_size,
2966                              AVPacket *avpkt)
2967 {
2968     const uint8_t *buf = avpkt->data;
2969     int buf_size = avpkt->size;
2970     H264Context *h = avctx->priv_data;
2971     MpegEncContext *s = &h->s;
2972     AVFrame *pict = data;
2973     int buf_index;
2974
2975     s->flags= avctx->flags;
2976     s->flags2= avctx->flags2;
2977
2978    /* end of stream, output what is still in the buffers */
2979  out:
2980     if (buf_size == 0) {
2981         Picture *out;
2982         int i, out_idx;
2983
2984 //FIXME factorize this with the output code below
2985         out = h->delayed_pic[0];
2986         out_idx = 0;
2987         for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2988             if(h->delayed_pic[i]->poc < out->poc){
2989                 out = h->delayed_pic[i];
2990                 out_idx = i;
2991             }
2992
2993         for(i=out_idx; h->delayed_pic[i]; i++)
2994             h->delayed_pic[i] = h->delayed_pic[i+1];
2995
2996         if(out){
2997             *data_size = sizeof(AVFrame);
2998             *pict= *(AVFrame*)out;
2999         }
3000
3001         return 0;
3002     }
3003
3004     buf_index=decode_nal_units(h, buf, buf_size);
3005     if(buf_index < 0)
3006         return -1;
3007
3008     if (!s->current_picture_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
3009         buf_size = 0;
3010         goto out;
3011     }
3012
3013     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
3014         if (avctx->skip_frame >= AVDISCARD_NONREF || s->hurry_up) return 0;
3015         av_log(avctx, AV_LOG_ERROR, "no frame!\n");
3016         return -1;
3017     }
3018
3019     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
3020         Picture *out = s->current_picture_ptr;
3021         Picture *cur = s->current_picture_ptr;
3022         int i, pics, out_of_order, out_idx;
3023
3024         field_end(h);
3025
3026         if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
3027             /* Wait for second field. */
3028             *data_size = 0;
3029
3030         } else {
3031             cur->interlaced_frame = 0;
3032             cur->repeat_pict = 0;
3033
3034             /* Signal interlacing information externally. */
3035             /* Prioritize picture timing SEI information over used decoding process if it exists. */
3036
3037             if(h->sps.pic_struct_present_flag){
3038                 switch (h->sei_pic_struct)
3039                 {
3040                 case SEI_PIC_STRUCT_FRAME:
3041                     break;
3042                 case SEI_PIC_STRUCT_TOP_FIELD:
3043                 case SEI_PIC_STRUCT_BOTTOM_FIELD:
3044                     cur->interlaced_frame = 1;
3045                     break;
3046                 case SEI_PIC_STRUCT_TOP_BOTTOM:
3047                 case SEI_PIC_STRUCT_BOTTOM_TOP:
3048                     if (FIELD_OR_MBAFF_PICTURE)
3049                         cur->interlaced_frame = 1;
3050                     else
3051                         // try to flag soft telecine progressive
3052                         cur->interlaced_frame = h->prev_interlaced_frame;
3053                     break;
3054                 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
3055                 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
3056                     // Signal the possibility of telecined film externally (pic_struct 5,6)
3057                     // From these hints, let the applications decide if they apply deinterlacing.
3058                     cur->repeat_pict = 1;
3059                     break;
3060                 case SEI_PIC_STRUCT_FRAME_DOUBLING:
3061                     // Force progressive here, as doubling interlaced frame is a bad idea.
3062                     cur->repeat_pict = 2;
3063                     break;
3064                 case SEI_PIC_STRUCT_FRAME_TRIPLING:
3065                     cur->repeat_pict = 4;
3066                     break;
3067                 }
3068
3069                 if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
3070                     cur->interlaced_frame = (h->sei_ct_type & (1<<1)) != 0;
3071             }else{
3072                 /* Derive interlacing flag from used decoding process. */
3073                 cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
3074             }
3075             h->prev_interlaced_frame = cur->interlaced_frame;
3076
3077             if (cur->field_poc[0] != cur->field_poc[1]){
3078                 /* Derive top_field_first from field pocs. */
3079                 cur->top_field_first = cur->field_poc[0] < cur->field_poc[1];
3080             }else{
3081                 if(cur->interlaced_frame || h->sps.pic_struct_present_flag){
3082                     /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
3083                     if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
3084                       || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
3085                         cur->top_field_first = 1;
3086                     else
3087                         cur->top_field_first = 0;
3088                 }else{
3089                     /* Most likely progressive */
3090                     cur->top_field_first = 0;
3091                 }
3092             }
3093
3094         //FIXME do something with unavailable reference frames
3095
3096             /* Sort B-frames into display order */
3097
3098             if(h->sps.bitstream_restriction_flag
3099                && s->avctx->has_b_frames < h->sps.num_reorder_frames){
3100                 s->avctx->has_b_frames = h->sps.num_reorder_frames;
3101                 s->low_delay = 0;
3102             }
3103
3104             if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
3105                && !h->sps.bitstream_restriction_flag){
3106                 s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
3107                 s->low_delay= 0;
3108             }
3109
3110             pics = 0;
3111             while(h->delayed_pic[pics]) pics++;
3112
3113             assert(pics <= MAX_DELAYED_PIC_COUNT);
3114
3115             h->delayed_pic[pics++] = cur;
3116             if(cur->reference == 0)
3117                 cur->reference = DELAYED_PIC_REF;
3118
3119             out = h->delayed_pic[0];
3120             out_idx = 0;
3121             for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
3122                 if(h->delayed_pic[i]->poc < out->poc){
3123                     out = h->delayed_pic[i];
3124                     out_idx = i;
3125                 }
3126             if(s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset))
3127                 h->outputed_poc= INT_MIN;
3128             out_of_order = out->poc < h->outputed_poc;
3129
3130             if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
3131                 { }
3132             else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
3133                || (s->low_delay &&
3134                 ((h->outputed_poc != INT_MIN && out->poc > h->outputed_poc + 2)
3135                  || cur->pict_type == FF_B_TYPE)))
3136             {
3137                 s->low_delay = 0;
3138                 s->avctx->has_b_frames++;
3139             }
3140
3141             if(out_of_order || pics > s->avctx->has_b_frames){
3142                 out->reference &= ~DELAYED_PIC_REF;
3143                 for(i=out_idx; h->delayed_pic[i]; i++)
3144                     h->delayed_pic[i] = h->delayed_pic[i+1];
3145             }
3146             if(!out_of_order && pics > s->avctx->has_b_frames){
3147                 *data_size = sizeof(AVFrame);
3148
3149                 if(out_idx==0 && h->delayed_pic[0] && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset)) {
3150                     h->outputed_poc = INT_MIN;
3151                 } else
3152                     h->outputed_poc = out->poc;
3153                 *pict= *(AVFrame*)out;
3154             }else{
3155                 av_log(avctx, AV_LOG_DEBUG, "no picture\n");
3156             }
3157         }
3158     }
3159
3160     assert(pict->data[0] || !*data_size);
3161     ff_print_debug_info(s, pict);
3162 //printf("out %d\n", (int)pict->data[0]);
3163
3164     return get_consumed_bytes(s, buf_index, buf_size);
3165 }
3166 #if 0
3167 static inline void fill_mb_avail(H264Context *h){
3168     MpegEncContext * const s = &h->s;
3169     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
3170
3171     if(s->mb_y){
3172         h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
3173         h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
3174         h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
3175     }else{
3176         h->mb_avail[0]=
3177         h->mb_avail[1]=
3178         h->mb_avail[2]= 0;
3179     }
3180     h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
3181     h->mb_avail[4]= 1; //FIXME move out
3182     h->mb_avail[5]= 0; //FIXME move out
3183 }
3184 #endif
3185
3186 #ifdef TEST
3187 #undef printf
3188 #undef random
3189 #define COUNT 8000
3190 #define SIZE (COUNT*40)
3191 int main(void){
3192     int i;
3193     uint8_t temp[SIZE];
3194     PutBitContext pb;
3195     GetBitContext gb;
3196 //    int int_temp[10000];
3197     DSPContext dsp;
3198     AVCodecContext avctx;
3199
3200     dsputil_init(&dsp, &avctx);
3201
3202     init_put_bits(&pb, temp, SIZE);
3203     printf("testing unsigned exp golomb\n");
3204     for(i=0; i<COUNT; i++){
3205         START_TIMER
3206         set_ue_golomb(&pb, i);
3207         STOP_TIMER("set_ue_golomb");
3208     }
3209     flush_put_bits(&pb);
3210
3211     init_get_bits(&gb, temp, 8*SIZE);
3212     for(i=0; i<COUNT; i++){
3213         int j, s;
3214
3215         s= show_bits(&gb, 24);
3216
3217         START_TIMER
3218         j= get_ue_golomb(&gb);
3219         if(j != i){
3220             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
3221 //            return -1;
3222         }
3223         STOP_TIMER("get_ue_golomb");
3224     }
3225
3226
3227     init_put_bits(&pb, temp, SIZE);
3228     printf("testing signed exp golomb\n");
3229     for(i=0; i<COUNT; i++){
3230         START_TIMER
3231         set_se_golomb(&pb, i - COUNT/2);
3232         STOP_TIMER("set_se_golomb");
3233     }
3234     flush_put_bits(&pb);
3235
3236     init_get_bits(&gb, temp, 8*SIZE);
3237     for(i=0; i<COUNT; i++){
3238         int j, s;
3239
3240         s= show_bits(&gb, 24);
3241
3242         START_TIMER
3243         j= get_se_golomb(&gb);
3244         if(j != i - COUNT/2){
3245             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
3246 //            return -1;
3247         }
3248         STOP_TIMER("get_se_golomb");
3249     }
3250
3251 #if 0
3252     printf("testing 4x4 (I)DCT\n");
3253
3254     DCTELEM block[16];
3255     uint8_t src[16], ref[16];
3256     uint64_t error= 0, max_error=0;
3257
3258     for(i=0; i<COUNT; i++){
3259         int j;
3260 //        printf("%d %d %d\n", r1, r2, (r2-r1)*16);
3261         for(j=0; j<16; j++){
3262             ref[j]= random()%255;
3263             src[j]= random()%255;
3264         }
3265
3266         h264_diff_dct_c(block, src, ref, 4);
3267
3268         //normalize
3269         for(j=0; j<16; j++){
3270 //            printf("%d ", block[j]);
3271             block[j]= block[j]*4;
3272             if(j&1) block[j]= (block[j]*4 + 2)/5;
3273             if(j&4) block[j]= (block[j]*4 + 2)/5;
3274         }
3275 //        printf("\n");
3276
3277         h->h264dsp.h264_idct_add(ref, block, 4);
3278 /*        for(j=0; j<16; j++){
3279             printf("%d ", ref[j]);
3280         }
3281         printf("\n");*/
3282
3283         for(j=0; j<16; j++){
3284             int diff= FFABS(src[j] - ref[j]);
3285
3286             error+= diff*diff;
3287             max_error= FFMAX(max_error, diff);
3288         }
3289     }
3290     printf("error=%f max_error=%d\n", ((float)error)/COUNT/16, (int)max_error );
3291     printf("testing quantizer\n");
3292     for(qp=0; qp<52; qp++){
3293         for(i=0; i<16; i++)
3294             src1_block[i]= src2_block[i]= random()%255;
3295
3296     }
3297     printf("Testing NAL layer\n");
3298
3299     uint8_t bitstream[COUNT];
3300     uint8_t nal[COUNT*2];
3301     H264Context h;
3302     memset(&h, 0, sizeof(H264Context));
3303
3304     for(i=0; i<COUNT; i++){
3305         int zeros= i;
3306         int nal_length;
3307         int consumed;
3308         int out_length;
3309         uint8_t *out;
3310         int j;
3311
3312         for(j=0; j<COUNT; j++){
3313             bitstream[j]= (random() % 255) + 1;
3314         }
3315
3316         for(j=0; j<zeros; j++){
3317             int pos= random() % COUNT;
3318             while(bitstream[pos] == 0){
3319                 pos++;
3320                 pos %= COUNT;
3321             }
3322             bitstream[pos]=0;
3323         }
3324
3325         START_TIMER
3326
3327         nal_length= encode_nal(&h, nal, bitstream, COUNT, COUNT*2);
3328         if(nal_length<0){
3329             printf("encoding failed\n");
3330             return -1;
3331         }
3332
3333         out= ff_h264_decode_nal(&h, nal, &out_length, &consumed, nal_length);
3334
3335         STOP_TIMER("NAL")
3336
3337         if(out_length != COUNT){
3338             printf("incorrect length %d %d\n", out_length, COUNT);
3339             return -1;
3340         }
3341
3342         if(consumed != nal_length){
3343             printf("incorrect consumed length %d %d\n", nal_length, consumed);
3344             return -1;
3345         }
3346
3347         if(memcmp(bitstream, out, COUNT)){
3348             printf("mismatch\n");
3349             return -1;
3350         }
3351     }
3352 #endif
3353
3354     printf("Testing RBSP\n");
3355
3356
3357     return 0;
3358 }
3359 #endif /* TEST */
3360
3361
3362 av_cold void ff_h264_free_context(H264Context *h)
3363 {
3364     int i;
3365
3366     free_tables(h, 1); //FIXME cleanup init stuff perhaps
3367
3368     for(i = 0; i < MAX_SPS_COUNT; i++)
3369         av_freep(h->sps_buffers + i);
3370
3371     for(i = 0; i < MAX_PPS_COUNT; i++)
3372         av_freep(h->pps_buffers + i);
3373 }
3374
3375 av_cold int ff_h264_decode_end(AVCodecContext *avctx)
3376 {
3377     H264Context *h = avctx->priv_data;
3378     MpegEncContext *s = &h->s;
3379
3380     ff_h264_free_context(h);
3381
3382     MPV_common_end(s);
3383
3384 //    memset(h, 0, sizeof(H264Context));
3385
3386     return 0;
3387 }
3388
3389 static const AVProfile profiles[] = {
3390     { FF_PROFILE_H264_BASELINE,             "Baseline"              },
3391     { FF_PROFILE_H264_CONSTRAINED_BASELINE, "Constrained Baseline"  },
3392     { FF_PROFILE_H264_MAIN,                 "Main"                  },
3393     { FF_PROFILE_H264_EXTENDED,             "Extended"              },
3394     { FF_PROFILE_H264_HIGH,                 "High"                  },
3395     { FF_PROFILE_H264_HIGH_10,              "High 10"               },
3396     { FF_PROFILE_H264_HIGH_10_INTRA,        "High 10 Intra"         },
3397     { FF_PROFILE_H264_HIGH_422,             "High 4:2:2"            },
3398     { FF_PROFILE_H264_HIGH_422_INTRA,       "High 4:2:2 Intra"      },
3399     { FF_PROFILE_H264_HIGH_444,             "High 4:4:4"            },
3400     { FF_PROFILE_H264_HIGH_444_PREDICTIVE,  "High 4:4:4 Predictive" },
3401     { FF_PROFILE_H264_HIGH_444_INTRA,       "High 4:4:4 Intra"      },
3402     { FF_PROFILE_H264_CAVLC_444,            "CAVLC 4:4:4"           },
3403     { FF_PROFILE_UNKNOWN },
3404 };
3405
3406 AVCodec ff_h264_decoder = {
3407     "h264",
3408     AVMEDIA_TYPE_VIDEO,
3409     CODEC_ID_H264,
3410     sizeof(H264Context),
3411     ff_h264_decode_init,
3412     NULL,
3413     ff_h264_decode_end,
3414     decode_frame,
3415     /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY,
3416     .flush= flush_dpb,
3417     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
3418     .profiles = NULL_IF_CONFIG_SMALL(profiles),
3419 };
3420
3421 #if CONFIG_H264_VDPAU_DECODER
3422 AVCodec ff_h264_vdpau_decoder = {
3423     "h264_vdpau",
3424     AVMEDIA_TYPE_VIDEO,
3425     CODEC_ID_H264,
3426     sizeof(H264Context),
3427     ff_h264_decode_init,
3428     NULL,
3429     ff_h264_decode_end,
3430     decode_frame,
3431     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
3432     .flush= flush_dpb,
3433     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
3434     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
3435     .profiles = NULL_IF_CONFIG_SMALL(profiles),
3436 };
3437 #endif