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   1 /*
   2  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
   3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file libavcodec/h264.c
  24  * H.264 / AVC / MPEG4 part10 codec.
  25  * @author Michael Niedermayer <michaelni@gmx.at>
  26  */
  27
  28 #include "internal.h"
  29 #include "dsputil.h"
  30 #include "avcodec.h"
  31 #include "mpegvideo.h"
  32 #include "h264.h"
  33 #include "h264data.h"
  34 #include "h264_mvpred.h"
  35 #include "h264_parser.h"
  36 #include "golomb.h"
  37 #include "mathops.h"
  38 #include "rectangle.h"
  39 #include "vdpau_internal.h"
  40
  41 #include "cabac.h"
  42
  43 //#undef NDEBUG
  44 #include <assert.h>
  45
  46 static const uint8_t rem6[52]={
  47 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
  48 };
  49
  50 static const uint8_t div6[52]={
  51 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
  52 };
  53
  54 void ff_h264_write_back_intra_pred_mode(H264Context *h){
  55     const int mb_xy= h->mb_xy;
  56
  57     h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
  58     h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
  59     h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
  60     h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
  61     h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
  62     h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
  63     h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
  64 }
  65
  66 /**
  67  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
  68  */
  69 int ff_h264_check_intra4x4_pred_mode(H264Context *h){
  70     MpegEncContext * const s = &h->s;
  71     static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
  72     static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
  73     int i;
  74
  75     if(!(h->top_samples_available&0x8000)){
  76         for(i=0; i<4; i++){
  77             int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
  78             if(status<0){
  79                 av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
  80                 return -1;
  81             } else if(status){
  82                 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
  83             }
  84         }
  85     }
  86
  87     if((h->left_samples_available&0x8888)!=0x8888){
  88         static const int mask[4]={0x8000,0x2000,0x80,0x20};
  89         for(i=0; i<4; i++){
  90             if(!(h->left_samples_available&mask[i])){
  91                 int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
  92                 if(status<0){
  93                     av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
  94                     return -1;
  95                 } else if(status){
  96                     h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
  97                 }
  98             }
  99         }
 100     }
 101
 102     return 0;
 103 } //FIXME cleanup like ff_h264_check_intra_pred_mode
 104
 105 /**
 106  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 107  */
 108 int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
 109     MpegEncContext * const s = &h->s;
 110     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
 111     static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
 112
 113     if(mode > 6U) {
 114         av_log(h->s.avctx, AV_LOG_ERROR, "out of range intra chroma pred mode at %d %d\n", s->mb_x, s->mb_y);
 115         return -1;
 116     }
 117
 118     if(!(h->top_samples_available&0x8000)){
 119         mode= top[ mode ];
 120         if(mode<0){
 121             av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
 122             return -1;
 123         }
 124     }
 125
 126     if((h->left_samples_available&0x8080) != 0x8080){
 127         mode= left[ mode ];
 128         if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
 129             mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
 130         }
 131         if(mode<0){
 132             av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
 133             return -1;
 134         }
 135     }
 136
 137     return mode;
 138 }
 139
 140 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
 141     int i, si, di;
 142     uint8_t *dst;
 143     int bufidx;
 144
 145 //    src[0]&0x80;                //forbidden bit
 146     h->nal_ref_idc= src[0]>>5;
 147     h->nal_unit_type= src[0]&0x1F;
 148
 149     src++; length--;
 150 #if 0
 151     for(i=0; i<length; i++)
 152         printf("%2X ", src[i]);
 153 #endif
 154
 155 #if HAVE_FAST_UNALIGNED
 156 # if HAVE_FAST_64BIT
 157 #   define RS 7
 158     for(i=0; i+1<length; i+=9){
 159         if(!((~*(const uint64_t*)(src+i) & (*(const uint64_t*)(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
 160 # else
 161 #   define RS 3
 162     for(i=0; i+1<length; i+=5){
 163         if(!((~*(const uint32_t*)(src+i) & (*(const uint32_t*)(src+i) - 0x01000101U)) & 0x80008080U))
 164 # endif
 165             continue;
 166         if(i>0 && !src[i]) i--;
 167         while(src[i]) i++;
 168 #else
 169 #   define RS 0
 170     for(i=0; i+1<length; i+=2){
 171         if(src[i]) continue;
 172         if(i>0 && src[i-1]==0) i--;
 173 #endif
 174         if(i+2<length && src[i+1]==0 && src[i+2]<=3){
 175             if(src[i+2]!=3){
 176                 /* startcode, so we must be past the end */
 177                 length=i;
 178             }
 179             break;
 180         }
 181         i-= RS;
 182     }
 183
 184     if(i>=length-1){ //no escaped 0
 185         *dst_length= length;
 186         *consumed= length+1; //+1 for the header
 187         return src;
 188     }
 189
 190     bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
 191     av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
 192     dst= h->rbsp_buffer[bufidx];
 193
 194     if (dst == NULL){
 195         return NULL;
 196     }
 197
 198 //printf("decoding esc\n");
 199     memcpy(dst, src, i);
 200     si=di=i;
 201     while(si+2<length){
 202         //remove escapes (very rare 1:2^22)
 203         if(src[si+2]>3){
 204             dst[di++]= src[si++];
 205             dst[di++]= src[si++];
 206         }else if(src[si]==0 && src[si+1]==0){
 207             if(src[si+2]==3){ //escape
 208                 dst[di++]= 0;
 209                 dst[di++]= 0;
 210                 si+=3;
 211                 continue;
 212             }else //next start code
 213                 goto nsc;
 214         }
 215
 216         dst[di++]= src[si++];
 217     }
 218     while(si<length)
 219         dst[di++]= src[si++];
 220 nsc:
 221
 222     memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
 223
 224     *dst_length= di;
 225     *consumed= si + 1;//+1 for the header
 226 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
 227     return dst;
 228 }
 229
 230 int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
 231     int v= *src;
 232     int r;
 233
 234     tprintf(h->s.avctx, "rbsp trailing %X\n", v);
 235
 236     for(r=1; r<9; r++){
 237         if(v&1) return r;
 238         v>>=1;
 239     }
 240     return 0;
 241 }
 242
 243 /**
 244  * IDCT transforms the 16 dc values and dequantizes them.
 245  * @param qp quantization parameter
 246  */
 247 static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
 248 #define stride 16
 249     int i;
 250     int temp[16]; //FIXME check if this is a good idea
 251     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
 252     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
 253
 254 //memset(block, 64, 2*256);
 255 //return;
 256     for(i=0; i<4; i++){
 257         const int offset= y_offset[i];
 258         const int z0= block[offset+stride*0] + block[offset+stride*4];
 259         const int z1= block[offset+stride*0] - block[offset+stride*4];
 260         const int z2= block[offset+stride*1] - block[offset+stride*5];
 261         const int z3= block[offset+stride*1] + block[offset+stride*5];
 262
 263         temp[4*i+0]= z0+z3;
 264         temp[4*i+1]= z1+z2;
 265         temp[4*i+2]= z1-z2;
 266         temp[4*i+3]= z0-z3;
 267     }
 268
 269     for(i=0; i<4; i++){
 270         const int offset= x_offset[i];
 271         const int z0= temp[4*0+i] + temp[4*2+i];
 272         const int z1= temp[4*0+i] - temp[4*2+i];
 273         const int z2= temp[4*1+i] - temp[4*3+i];
 274         const int z3= temp[4*1+i] + temp[4*3+i];
 275
 276         block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
 277         block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
 278         block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
 279         block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
 280     }
 281 }
 282
 283 #if 0
 284 /**
 285  * DCT transforms the 16 dc values.
 286  * @param qp quantization parameter ??? FIXME
 287  */
 288 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
 289 //    const int qmul= dequant_coeff[qp][0];
 290     int i;
 291     int temp[16]; //FIXME check if this is a good idea
 292     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
 293     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
 294
 295     for(i=0; i<4; i++){
 296         const int offset= y_offset[i];
 297         const int z0= block[offset+stride*0] + block[offset+stride*4];
 298         const int z1= block[offset+stride*0] - block[offset+stride*4];
 299         const int z2= block[offset+stride*1] - block[offset+stride*5];
 300         const int z3= block[offset+stride*1] + block[offset+stride*5];
 301
 302         temp[4*i+0]= z0+z3;
 303         temp[4*i+1]= z1+z2;
 304         temp[4*i+2]= z1-z2;
 305         temp[4*i+3]= z0-z3;
 306     }
 307
 308     for(i=0; i<4; i++){
 309         const int offset= x_offset[i];
 310         const int z0= temp[4*0+i] + temp[4*2+i];
 311         const int z1= temp[4*0+i] - temp[4*2+i];
 312         const int z2= temp[4*1+i] - temp[4*3+i];
 313         const int z3= temp[4*1+i] + temp[4*3+i];
 314
 315         block[stride*0 +offset]= (z0 + z3)>>1;
 316         block[stride*2 +offset]= (z1 + z2)>>1;
 317         block[stride*8 +offset]= (z1 - z2)>>1;
 318         block[stride*10+offset]= (z0 - z3)>>1;
 319     }
 320 }
 321 #endif
 322
 323 #undef xStride
 324 #undef stride
 325
 326 static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
 327     const int stride= 16*2;
 328     const int xStride= 16;
 329     int a,b,c,d,e;
 330
 331     a= block[stride*0 + xStride*0];
 332     b= block[stride*0 + xStride*1];
 333     c= block[stride*1 + xStride*0];
 334     d= block[stride*1 + xStride*1];
 335
 336     e= a-b;
 337     a= a+b;
 338     b= c-d;
 339     c= c+d;
 340
 341     block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
 342     block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
 343     block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
 344     block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
 345 }
 346
 347 #if 0
 348 static void chroma_dc_dct_c(DCTELEM *block){
 349     const int stride= 16*2;
 350     const int xStride= 16;
 351     int a,b,c,d,e;
 352
 353     a= block[stride*0 + xStride*0];
 354     b= block[stride*0 + xStride*1];
 355     c= block[stride*1 + xStride*0];
 356     d= block[stride*1 + xStride*1];
 357
 358     e= a-b;
 359     a= a+b;
 360     b= c-d;
 361     c= c+d;
 362
 363     block[stride*0 + xStride*0]= (a+c);
 364     block[stride*0 + xStride*1]= (e+b);
 365     block[stride*1 + xStride*0]= (a-c);
 366     block[stride*1 + xStride*1]= (e-b);
 367 }
 368 #endif
 369
 370 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
 371                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 372                            int src_x_offset, int src_y_offset,
 373                            qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
 374     MpegEncContext * const s = &h->s;
 375     const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
 376     int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
 377     const int luma_xy= (mx&3) + ((my&3)<<2);
 378     uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
 379     uint8_t * src_cb, * src_cr;
 380     int extra_width= h->emu_edge_width;
 381     int extra_height= h->emu_edge_height;
 382     int emu=0;
 383     const int full_mx= mx>>2;
 384     const int full_my= my>>2;
 385     const int pic_width  = 16*s->mb_width;
 386     const int pic_height = 16*s->mb_height >> MB_FIELD;
 387
 388     if(mx&7) extra_width -= 3;
 389     if(my&7) extra_height -= 3;
 390
 391     if(   full_mx < 0-extra_width
 392        || full_my < 0-extra_height
 393        || full_mx + 16/*FIXME*/ > pic_width + extra_width
 394        || full_my + 16/*FIXME*/ > pic_height + extra_height){
 395         ff_emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->mb_linesize, h->mb_linesize, 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
 396             src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
 397         emu=1;
 398     }
 399
 400     qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
 401     if(!square){
 402         qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
 403     }
 404
 405     if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
 406
 407     if(MB_FIELD){
 408         // chroma offset when predicting from a field of opposite parity
 409         my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
 410         emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
 411     }
 412     src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
 413     src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
 414
 415     if(emu){
 416         ff_emulated_edge_mc(s->edge_emu_buffer, src_cb, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
 417             src_cb= s->edge_emu_buffer;
 418     }
 419     chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
 420
 421     if(emu){
 422         ff_emulated_edge_mc(s->edge_emu_buffer, src_cr, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
 423             src_cr= s->edge_emu_buffer;
 424     }
 425     chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
 426 }
 427
 428 static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
 429                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 430                            int x_offset, int y_offset,
 431                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 432                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 433                            int list0, int list1){
 434     MpegEncContext * const s = &h->s;
 435     qpel_mc_func *qpix_op=  qpix_put;
 436     h264_chroma_mc_func chroma_op= chroma_put;
 437
 438     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
 439     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
 440     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
 441     x_offset += 8*s->mb_x;
 442     y_offset += 8*(s->mb_y >> MB_FIELD);
 443
 444     if(list0){
 445         Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
 446         mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
 447                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 448                            qpix_op, chroma_op);
 449
 450         qpix_op=  qpix_avg;
 451         chroma_op= chroma_avg;
 452     }
 453
 454     if(list1){
 455         Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
 456         mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
 457                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 458                            qpix_op, chroma_op);
 459     }
 460 }
 461
 462 static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
 463                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 464                            int x_offset, int y_offset,
 465                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 466                            h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
 467                            h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
 468                            int list0, int list1){
 469     MpegEncContext * const s = &h->s;
 470
 471     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
 472     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
 473     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
 474     x_offset += 8*s->mb_x;
 475     y_offset += 8*(s->mb_y >> MB_FIELD);
 476
 477     if(list0 && list1){
 478         /* don't optimize for luma-only case, since B-frames usually
 479          * use implicit weights => chroma too. */
 480         uint8_t *tmp_cb = s->obmc_scratchpad;
 481         uint8_t *tmp_cr = s->obmc_scratchpad + 8;
 482         uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
 483         int refn0 = h->ref_cache[0][ scan8[n] ];
 484         int refn1 = h->ref_cache[1][ scan8[n] ];
 485
 486         mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
 487                     dest_y, dest_cb, dest_cr,
 488                     x_offset, y_offset, qpix_put, chroma_put);
 489         mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
 490                     tmp_y, tmp_cb, tmp_cr,
 491                     x_offset, y_offset, qpix_put, chroma_put);
 492
 493         if(h->use_weight == 2){
 494             int weight0 = h->implicit_weight[refn0][refn1];
 495             int weight1 = 64 - weight0;
 496             luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
 497             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
 498             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
 499         }else{
 500             luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
 501                             h->luma_weight[0][refn0], h->luma_weight[1][refn1],
 502                             h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
 503             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 504                             h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
 505                             h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
 506             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 507                             h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
 508                             h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
 509         }
 510     }else{
 511         int list = list1 ? 1 : 0;
 512         int refn = h->ref_cache[list][ scan8[n] ];
 513         Picture *ref= &h->ref_list[list][refn];
 514         mc_dir_part(h, ref, n, square, chroma_height, delta, list,
 515                     dest_y, dest_cb, dest_cr, x_offset, y_offset,
 516                     qpix_put, chroma_put);
 517
 518         luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
 519                        h->luma_weight[list][refn], h->luma_offset[list][refn]);
 520         if(h->use_weight_chroma){
 521             chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 522                              h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
 523             chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 524                              h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
 525         }
 526     }
 527 }
 528
 529 static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
 530                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 531                            int x_offset, int y_offset,
 532                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 533                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 534                            h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 535                            int list0, int list1){
 536     if((h->use_weight==2 && list0 && list1
 537         && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
 538        || h->use_weight==1)
 539         mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
 540                          x_offset, y_offset, qpix_put, chroma_put,
 541                          weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
 542     else
 543         mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
 544                     x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
 545 }
 546
 547 static inline void prefetch_motion(H264Context *h, int list){
 548     /* fetch pixels for estimated mv 4 macroblocks ahead
 549      * optimized for 64byte cache lines */
 550     MpegEncContext * const s = &h->s;
 551     const int refn = h->ref_cache[list][scan8[0]];
 552     if(refn >= 0){
 553         const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
 554         const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
 555         uint8_t **src= h->ref_list[list][refn].data;
 556         int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
 557         s->dsp.prefetch(src[0]+off, s->linesize, 4);
 558         off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
 559         s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
 560     }
 561 }
 562
 563 static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 564                       qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
 565                       qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
 566                       h264_weight_func *weight_op, h264_biweight_func *weight_avg){
 567     MpegEncContext * const s = &h->s;
 568     const int mb_xy= h->mb_xy;
 569     const int mb_type= s->current_picture.mb_type[mb_xy];
 570
 571     assert(IS_INTER(mb_type));
 572
 573     prefetch_motion(h, 0);
 574
 575     if(IS_16X16(mb_type)){
 576         mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
 577                 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
 578                 weight_op, weight_avg,
 579                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
 580     }else if(IS_16X8(mb_type)){
 581         mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
 582                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 583                 &weight_op[1], &weight_avg[1],
 584                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
 585         mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
 586                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 587                 &weight_op[1], &weight_avg[1],
 588                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
 589     }else if(IS_8X16(mb_type)){
 590         mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
 591                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 592                 &weight_op[2], &weight_avg[2],
 593                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
 594         mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
 595                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 596                 &weight_op[2], &weight_avg[2],
 597                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
 598     }else{
 599         int i;
 600
 601         assert(IS_8X8(mb_type));
 602
 603         for(i=0; i<4; i++){
 604             const int sub_mb_type= h->sub_mb_type[i];
 605             const int n= 4*i;
 606             int x_offset= (i&1)<<2;
 607             int y_offset= (i&2)<<1;
 608
 609             if(IS_SUB_8X8(sub_mb_type)){
 610                 mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 611                     qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 612                     &weight_op[3], &weight_avg[3],
 613                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 614             }else if(IS_SUB_8X4(sub_mb_type)){
 615                 mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 616                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 617                     &weight_op[4], &weight_avg[4],
 618                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 619                 mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
 620                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 621                     &weight_op[4], &weight_avg[4],
 622                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 623             }else if(IS_SUB_4X8(sub_mb_type)){
 624                 mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 625                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 626                     &weight_op[5], &weight_avg[5],
 627                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 628                 mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
 629                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 630                     &weight_op[5], &weight_avg[5],
 631                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 632             }else{
 633                 int j;
 634                 assert(IS_SUB_4X4(sub_mb_type));
 635                 for(j=0; j<4; j++){
 636                     int sub_x_offset= x_offset + 2*(j&1);
 637                     int sub_y_offset= y_offset +   (j&2);
 638                     mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
 639                         qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 640                         &weight_op[6], &weight_avg[6],
 641                         IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 642                 }
 643             }
 644         }
 645     }
 646
 647     prefetch_motion(h, 1);
 648 }
 649
 650
 651 static void free_tables(H264Context *h){
 652     int i;
 653     H264Context *hx;
 654     av_freep(&h->intra4x4_pred_mode);
 655     av_freep(&h->chroma_pred_mode_table);
 656     av_freep(&h->cbp_table);
 657     av_freep(&h->mvd_table[0]);
 658     av_freep(&h->mvd_table[1]);
 659     av_freep(&h->direct_table);
 660     av_freep(&h->non_zero_count);
 661     av_freep(&h->slice_table_base);
 662     h->slice_table= NULL;
 663     av_freep(&h->list_counts);
 664
 665     av_freep(&h->mb2b_xy);
 666     av_freep(&h->mb2b8_xy);
 667
 668     for(i = 0; i < MAX_THREADS; i++) {
 669         hx = h->thread_context[i];
 670         if(!hx) continue;
 671         av_freep(&hx->top_borders[1]);
 672         av_freep(&hx->top_borders[0]);
 673         av_freep(&hx->s.obmc_scratchpad);
 674         av_freep(&hx->rbsp_buffer[1]);
 675         av_freep(&hx->rbsp_buffer[0]);
 676         hx->rbsp_buffer_size[0] = 0;
 677         hx->rbsp_buffer_size[1] = 0;
 678         if (i) av_freep(&h->thread_context[i]);
 679     }
 680 }
 681
 682 static void init_dequant8_coeff_table(H264Context *h){
 683     int i,q,x;
 684     const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
 685     h->dequant8_coeff[0] = h->dequant8_buffer[0];
 686     h->dequant8_coeff[1] = h->dequant8_buffer[1];
 687
 688     for(i=0; i<2; i++ ){
 689         if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
 690             h->dequant8_coeff[1] = h->dequant8_buffer[0];
 691             break;
 692         }
 693
 694         for(q=0; q<52; q++){
 695             int shift = div6[q];
 696             int idx = rem6[q];
 697             for(x=0; x<64; x++)
 698                 h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
 699                     ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
 700                     h->pps.scaling_matrix8[i][x]) << shift;
 701         }
 702     }
 703 }
 704
 705 static void init_dequant4_coeff_table(H264Context *h){
 706     int i,j,q,x;
 707     const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
 708     for(i=0; i<6; i++ ){
 709         h->dequant4_coeff[i] = h->dequant4_buffer[i];
 710         for(j=0; j<i; j++){
 711             if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
 712                 h->dequant4_coeff[i] = h->dequant4_buffer[j];
 713                 break;
 714             }
 715         }
 716         if(j<i)
 717             continue;
 718
 719         for(q=0; q<52; q++){
 720             int shift = div6[q] + 2;
 721             int idx = rem6[q];
 722             for(x=0; x<16; x++)
 723                 h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
 724                     ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
 725                     h->pps.scaling_matrix4[i][x]) << shift;
 726         }
 727     }
 728 }
 729
 730 static void init_dequant_tables(H264Context *h){
 731     int i,x;
 732     init_dequant4_coeff_table(h);
 733     if(h->pps.transform_8x8_mode)
 734         init_dequant8_coeff_table(h);
 735     if(h->sps.transform_bypass){
 736         for(i=0; i<6; i++)
 737             for(x=0; x<16; x++)
 738                 h->dequant4_coeff[i][0][x] = 1<<6;
 739         if(h->pps.transform_8x8_mode)
 740             for(i=0; i<2; i++)
 741                 for(x=0; x<64; x++)
 742                     h->dequant8_coeff[i][0][x] = 1<<6;
 743     }
 744 }
 745
 746
 747 int ff_h264_alloc_tables(H264Context *h){
 748     MpegEncContext * const s = &h->s;
 749     const int big_mb_num= s->mb_stride * (s->mb_height+1);
 750     int x,y;
 751
 752     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, big_mb_num * 8  * sizeof(uint8_t), fail)
 753
 754     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 32 * sizeof(uint8_t), fail)
 755     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
 756     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
 757
 758     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
 759     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 32*big_mb_num * sizeof(uint16_t), fail);
 760     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 32*big_mb_num * sizeof(uint16_t), fail);
 761     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 32*big_mb_num * sizeof(uint8_t) , fail);
 762     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
 763
 764     memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
 765     h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
 766
 767     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
 768     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b8_xy , big_mb_num * sizeof(uint32_t), fail);
 769     for(y=0; y<s->mb_height; y++){
 770         for(x=0; x<s->mb_width; x++){
 771             const int mb_xy= x + y*s->mb_stride;
 772             const int b_xy = 4*x + 4*y*h->b_stride;
 773             const int b8_xy= 2*x + 2*y*h->b8_stride;
 774
 775             h->mb2b_xy [mb_xy]= b_xy;
 776             h->mb2b8_xy[mb_xy]= b8_xy;
 777         }
 778     }
 779
 780     s->obmc_scratchpad = NULL;
 781
 782     if(!h->dequant4_coeff[0])
 783         init_dequant_tables(h);
 784
 785     return 0;
 786 fail:
 787     free_tables(h);
 788     return -1;
 789 }
 790
 791 /**
 792  * Mimic alloc_tables(), but for every context thread.
 793  */
 794 static void clone_tables(H264Context *dst, H264Context *src){
 795     dst->intra4x4_pred_mode       = src->intra4x4_pred_mode;
 796     dst->non_zero_count           = src->non_zero_count;
 797     dst->slice_table              = src->slice_table;
 798     dst->cbp_table                = src->cbp_table;
 799     dst->mb2b_xy                  = src->mb2b_xy;
 800     dst->mb2b8_xy                 = src->mb2b8_xy;
 801     dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
 802     dst->mvd_table[0]             = src->mvd_table[0];
 803     dst->mvd_table[1]             = src->mvd_table[1];
 804     dst->direct_table             = src->direct_table;
 805     dst->list_counts              = src->list_counts;
 806
 807     dst->s.obmc_scratchpad = NULL;
 808     ff_h264_pred_init(&dst->hpc, src->s.codec_id);
 809 }
 810
 811 /**
 812  * Init context
 813  * Allocate buffers which are not shared amongst multiple threads.
 814  */
 815 static int context_init(H264Context *h){
 816     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
 817     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
 818
 819     return 0;
 820 fail:
 821     return -1; // free_tables will clean up for us
 822 }
 823
 824 static av_cold void common_init(H264Context *h){
 825     MpegEncContext * const s = &h->s;
 826
 827     s->width = s->avctx->width;
 828     s->height = s->avctx->height;
 829     s->codec_id= s->avctx->codec->id;
 830
 831     ff_h264_pred_init(&h->hpc, s->codec_id);
 832
 833     h->dequant_coeff_pps= -1;
 834     s->unrestricted_mv=1;
 835     s->decode=1; //FIXME
 836
 837     dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
 838
 839     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
 840     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
 841 }
 842
 843 av_cold int ff_h264_decode_init(AVCodecContext *avctx){
 844     H264Context *h= avctx->priv_data;
 845     MpegEncContext * const s = &h->s;
 846
 847     MPV_decode_defaults(s);
 848
 849     s->avctx = avctx;
 850     common_init(h);
 851
 852     s->out_format = FMT_H264;
 853     s->workaround_bugs= avctx->workaround_bugs;
 854
 855     // set defaults
 856 //    s->decode_mb= ff_h263_decode_mb;
 857     s->quarter_sample = 1;
 858     if(!avctx->has_b_frames)
 859     s->low_delay= 1;
 860
 861     avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
 862
 863     ff_h264_decode_init_vlc();
 864
 865     if(avctx->extradata_size > 0 && avctx->extradata &&
 866        *(char *)avctx->extradata == 1){
 867         h->is_avc = 1;
 868         h->got_avcC = 0;
 869     } else {
 870         h->is_avc = 0;
 871     }
 872
 873     h->thread_context[0] = h;
 874     h->outputed_poc = INT_MIN;
 875     h->prev_poc_msb= 1<<16;
 876     h->x264_build = -1;
 877     ff_h264_reset_sei(h);
 878     if(avctx->codec_id == CODEC_ID_H264){
 879         if(avctx->ticks_per_frame == 1){
 880             s->avctx->time_base.den *=2;
 881         }
 882         avctx->ticks_per_frame = 2;
 883     }
 884     return 0;
 885 }
 886
 887 int ff_h264_frame_start(H264Context *h){
 888     MpegEncContext * const s = &h->s;
 889     int i;
 890
 891     if(MPV_frame_start(s, s->avctx) < 0)
 892         return -1;
 893     ff_er_frame_start(s);
 894     /*
 895      * MPV_frame_start uses pict_type to derive key_frame.
 896      * This is incorrect for H.264; IDR markings must be used.
 897      * Zero here; IDR markings per slice in frame or fields are ORed in later.
 898      * See decode_nal_units().
 899      */
 900     s->current_picture_ptr->key_frame= 0;
 901     s->current_picture_ptr->mmco_reset= 0;
 902
 903     assert(s->linesize && s->uvlinesize);
 904
 905     for(i=0; i<16; i++){
 906         h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
 907         h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
 908     }
 909     for(i=0; i<4; i++){
 910         h->block_offset[16+i]=
 911         h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
 912         h->block_offset[24+16+i]=
 913         h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
 914     }
 915
 916     /* can't be in alloc_tables because linesize isn't known there.
 917      * FIXME: redo bipred weight to not require extra buffer? */
 918     for(i = 0; i < s->avctx->thread_count; i++)
 919         if(!h->thread_context[i]->s.obmc_scratchpad)
 920             h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
 921
 922     /* some macroblocks will be accessed before they're available */
 923     if(FRAME_MBAFF || s->avctx->thread_count > 1)
 924         memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
 925
 926 //    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
 927
 928     // We mark the current picture as non-reference after allocating it, so
 929     // that if we break out due to an error it can be released automatically
 930     // in the next MPV_frame_start().
 931     // SVQ3 as well as most other codecs have only last/next/current and thus
 932     // get released even with set reference, besides SVQ3 and others do not
 933     // mark frames as reference later "naturally".
 934     if(s->codec_id != CODEC_ID_SVQ3)
 935         s->current_picture_ptr->reference= 0;
 936
 937     s->current_picture_ptr->field_poc[0]=
 938     s->current_picture_ptr->field_poc[1]= INT_MAX;
 939     assert(s->current_picture_ptr->long_ref==0);
 940
 941     return 0;
 942 }
 943
 944 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){
 945     MpegEncContext * const s = &h->s;
 946     uint8_t *top_border;
 947     int top_idx = 1;
 948
 949     src_y  -=   linesize;
 950     src_cb -= uvlinesize;
 951     src_cr -= uvlinesize;
 952
 953     if(!simple && FRAME_MBAFF){
 954         if(s->mb_y&1){
 955             if(!MB_MBAFF){
 956                 top_border = h->top_borders[0][s->mb_x];
 957                 AV_COPY128(top_border, src_y + 15*linesize);
 958                 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
 959                     AV_COPY64(top_border+16, src_cb+7*uvlinesize);
 960                     AV_COPY64(top_border+24, src_cr+7*uvlinesize);
 961                 }
 962             }
 963         }else if(MB_MBAFF){
 964             top_idx = 0;
 965         }else
 966             return;
 967     }
 968
 969     top_border = h->top_borders[top_idx][s->mb_x];
 970     // There are two lines saved, the line above the the top macroblock of a pair,
 971     // and the line above the bottom macroblock
 972     AV_COPY128(top_border, src_y + 16*linesize);
 973
 974     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
 975         AV_COPY64(top_border+16, src_cb+8*uvlinesize);
 976         AV_COPY64(top_border+24, src_cr+8*uvlinesize);
 977     }
 978 }
 979
 980 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){
 981     MpegEncContext * const s = &h->s;
 982     int deblock_left;
 983     int deblock_top;
 984     int mb_xy;
 985     int top_idx = 1;
 986     uint8_t *top_border_m1;
 987     uint8_t *top_border;
 988
 989     if(!simple && FRAME_MBAFF){
 990         if(s->mb_y&1){
 991             if(!MB_MBAFF)
 992                 return;
 993         }else{
 994             top_idx = MB_MBAFF ? 0 : 1;
 995         }
 996     }
 997
 998     if(h->deblocking_filter == 2) {
 999         mb_xy = h->mb_xy;
1000         deblock_left = h->slice_table[mb_xy] == h->slice_table[mb_xy - 1];
1001         deblock_top  = h->slice_table[mb_xy] == h->slice_table[h->top_mb_xy];
1002     } else {
1003         deblock_left = (s->mb_x > 0);
1004         deblock_top =  (s->mb_y > !!MB_FIELD);
1005     }
1006
1007     src_y  -=   linesize + 1;
1008     src_cb -= uvlinesize + 1;
1009     src_cr -= uvlinesize + 1;
1010
1011     top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1012     top_border    = h->top_borders[top_idx][s->mb_x];
1013
1014 #define XCHG(a,b,xchg)\
1015 if (xchg) AV_SWAP64(b,a);\
1016 else      AV_COPY64(b,a);
1017
1018     if(deblock_top){
1019         if(deblock_left){
1020             XCHG(top_border_m1+8, src_y -7, 1);
1021         }
1022         XCHG(top_border+0, src_y +1, xchg);
1023         XCHG(top_border+8, src_y +9, 1);
1024         if(s->mb_x+1 < s->mb_width){
1025             XCHG(h->top_borders[top_idx][s->mb_x+1], src_y +17, 1);
1026         }
1027     }
1028
1029     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1030         if(deblock_top){
1031             if(deblock_left){
1032                 XCHG(top_border_m1+16, src_cb -7, 1);
1033                 XCHG(top_border_m1+24, src_cr -7, 1);
1034             }
1035             XCHG(top_border+16, src_cb+1, 1);
1036             XCHG(top_border+24, src_cr+1, 1);
1037         }
1038     }
1039 }
1040
1041 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
1042     MpegEncContext * const s = &h->s;
1043     const int mb_x= s->mb_x;
1044     const int mb_y= s->mb_y;
1045     const int mb_xy= h->mb_xy;
1046     const int mb_type= s->current_picture.mb_type[mb_xy];
1047     uint8_t  *dest_y, *dest_cb, *dest_cr;
1048     int linesize, uvlinesize /*dct_offset*/;
1049     int i;
1050     int *block_offset = &h->block_offset[0];
1051     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1052     /* is_h264 should always be true if SVQ3 is disabled. */
1053     const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1054     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1055     void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1056
1057     dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
1058     dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
1059     dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
1060
1061     s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
1062     s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
1063
1064     h->list_counts[mb_xy]= h->list_count;
1065
1066     if (!simple && MB_FIELD) {
1067         linesize   = h->mb_linesize   = s->linesize * 2;
1068         uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1069         block_offset = &h->block_offset[24];
1070         if(mb_y&1){ //FIXME move out of this function?
1071             dest_y -= s->linesize*15;
1072             dest_cb-= s->uvlinesize*7;
1073             dest_cr-= s->uvlinesize*7;
1074         }
1075         if(FRAME_MBAFF) {
1076             int list;
1077             for(list=0; list<h->list_count; list++){
1078                 if(!USES_LIST(mb_type, list))
1079                     continue;
1080                 if(IS_16X16(mb_type)){
1081                     int8_t *ref = &h->ref_cache[list][scan8[0]];
1082                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1083                 }else{
1084                     for(i=0; i<16; i+=4){
1085                         int ref = h->ref_cache[list][scan8[i]];
1086                         if(ref >= 0)
1087                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1088                     }
1089                 }
1090             }
1091         }
1092     } else {
1093         linesize   = h->mb_linesize   = s->linesize;
1094         uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1095 //        dct_offset = s->linesize * 16;
1096     }
1097
1098     if (!simple && IS_INTRA_PCM(mb_type)) {
1099         for (i=0; i<16; i++) {
1100             memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1101         }
1102         for (i=0; i<8; i++) {
1103             memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
1104             memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
1105         }
1106     } else {
1107         if(IS_INTRA(mb_type)){
1108             if(h->deblocking_filter)
1109                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
1110
1111             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1112                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1113                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1114             }
1115
1116             if(IS_INTRA4x4(mb_type)){
1117                 if(simple || !s->encoding){
1118                     if(IS_8x8DCT(mb_type)){
1119                         if(transform_bypass){
1120                             idct_dc_add =
1121                             idct_add    = s->dsp.add_pixels8;
1122                         }else{
1123                             idct_dc_add = s->dsp.h264_idct8_dc_add;
1124                             idct_add    = s->dsp.h264_idct8_add;
1125                         }
1126                         for(i=0; i<16; i+=4){
1127                             uint8_t * const ptr= dest_y + block_offset[i];
1128                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1129                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1130                                 h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
1131                             }else{
1132                                 const int nnz = h->non_zero_count_cache[ scan8[i] ];
1133                                 h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1134                                                             (h->topright_samples_available<<i)&0x4000, linesize);
1135                                 if(nnz){
1136                                     if(nnz == 1 && h->mb[i*16])
1137                                         idct_dc_add(ptr, h->mb + i*16, linesize);
1138                                     else
1139                                         idct_add   (ptr, h->mb + i*16, linesize);
1140                                 }
1141                             }
1142                         }
1143                     }else{
1144                         if(transform_bypass){
1145                             idct_dc_add =
1146                             idct_add    = s->dsp.add_pixels4;
1147                         }else{
1148                             idct_dc_add = s->dsp.h264_idct_dc_add;
1149                             idct_add    = s->dsp.h264_idct_add;
1150                         }
1151                         for(i=0; i<16; i++){
1152                             uint8_t * const ptr= dest_y + block_offset[i];
1153                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1154
1155                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1156                                 h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
1157                             }else{
1158                                 uint8_t *topright;
1159                                 int nnz, tr;
1160                                 if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1161                                     const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1162                                     assert(mb_y || linesize <= block_offset[i]);
1163                                     if(!topright_avail){
1164                                         tr= ptr[3 - linesize]*0x01010101;
1165                                         topright= (uint8_t*) &tr;
1166                                     }else
1167                                         topright= ptr + 4 - linesize;
1168                                 }else
1169                                     topright= NULL;
1170
1171                                 h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1172                                 nnz = h->non_zero_count_cache[ scan8[i] ];
1173                                 if(nnz){
1174                                     if(is_h264){
1175                                         if(nnz == 1 && h->mb[i*16])
1176                                             idct_dc_add(ptr, h->mb + i*16, linesize);
1177                                         else
1178                                             idct_add   (ptr, h->mb + i*16, linesize);
1179                                     }else
1180                                         ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
1181                                 }
1182                             }
1183                         }
1184                     }
1185                 }
1186             }else{
1187                 h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1188                 if(is_h264){
1189                     if(!transform_bypass)
1190                         h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
1191                 }else
1192                     ff_svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
1193             }
1194             if(h->deblocking_filter)
1195                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
1196         }else if(is_h264){
1197             hl_motion(h, dest_y, dest_cb, dest_cr,
1198                       s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1199                       s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1200                       s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
1201         }
1202
1203
1204         if(!IS_INTRA4x4(mb_type)){
1205             if(is_h264){
1206                 if(IS_INTRA16x16(mb_type)){
1207                     if(transform_bypass){
1208                         if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1209                             h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
1210                         }else{
1211                             for(i=0; i<16; i++){
1212                                 if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1213                                     s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
1214                             }
1215                         }
1216                     }else{
1217                          s->dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1218                     }
1219                 }else if(h->cbp&15){
1220                     if(transform_bypass){
1221                         const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1222                         idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1223                         for(i=0; i<16; i+=di){
1224                             if(h->non_zero_count_cache[ scan8[i] ]){
1225                                 idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
1226                             }
1227                         }
1228                     }else{
1229                         if(IS_8x8DCT(mb_type)){
1230                             s->dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1231                         }else{
1232                             s->dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1233                         }
1234                     }
1235                 }
1236             }else{
1237                 for(i=0; i<16; i++){
1238                     if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
1239                         uint8_t * const ptr= dest_y + block_offset[i];
1240                         ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1241                     }
1242                 }
1243             }
1244         }
1245
1246         if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1247             uint8_t *dest[2] = {dest_cb, dest_cr};
1248             if(transform_bypass){
1249                 if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1250                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
1251                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
1252                 }else{
1253                     idct_add = s->dsp.add_pixels4;
1254                     for(i=16; i<16+8; i++){
1255                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1256                             idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1257                     }
1258                 }
1259             }else{
1260                 chroma_dc_dequant_idct_c(h->mb + 16*16, h->chroma_qp[0], h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
1261                 chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->chroma_qp[1], h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
1262                 if(is_h264){
1263                     idct_add = s->dsp.h264_idct_add;
1264                     idct_dc_add = s->dsp.h264_idct_dc_add;
1265                     for(i=16; i<16+8; i++){
1266                         if(h->non_zero_count_cache[ scan8[i] ])
1267                             idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1268                         else if(h->mb[i*16])
1269                             idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1270                     }
1271                 }else{
1272                     for(i=16; i<16+8; i++){
1273                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1274                             uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
1275                             ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[s->qscale + 12] - 12, 2);
1276                         }
1277                     }
1278                 }
1279             }
1280         }
1281     }
1282     if(h->cbp || IS_INTRA(mb_type))
1283         s->dsp.clear_blocks(h->mb);
1284
1285     if(h->deblocking_filter && 0) {
1286         backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, simple);
1287         fill_filter_caches(h, mb_type); //FIXME don't fill stuff which isn't used by filter_mb
1288         h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
1289         h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
1290         if (!simple && FRAME_MBAFF) {
1291             ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
1292         } else {
1293             ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
1294         }
1295     }
1296 }
1297
1298 /**
1299  * Process a macroblock; this case avoids checks for expensive uncommon cases.
1300  */
1301 static void hl_decode_mb_simple(H264Context *h){
1302     hl_decode_mb_internal(h, 1);
1303 }
1304
1305 /**
1306  * Process a macroblock; this handles edge cases, such as interlacing.
1307  */
1308 static void av_noinline hl_decode_mb_complex(H264Context *h){
1309     hl_decode_mb_internal(h, 0);
1310 }
1311
1312 void ff_h264_hl_decode_mb(H264Context *h){
1313     MpegEncContext * const s = &h->s;
1314     const int mb_xy= h->mb_xy;
1315     const int mb_type= s->current_picture.mb_type[mb_xy];
1316     int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
1317
1318     if (is_complex)
1319         hl_decode_mb_complex(h);
1320     else hl_decode_mb_simple(h);
1321 }
1322
1323 static int pred_weight_table(H264Context *h){
1324     MpegEncContext * const s = &h->s;
1325     int list, i;
1326     int luma_def, chroma_def;
1327
1328     h->use_weight= 0;
1329     h->use_weight_chroma= 0;
1330     h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
1331     h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
1332     luma_def = 1<<h->luma_log2_weight_denom;
1333     chroma_def = 1<<h->chroma_log2_weight_denom;
1334
1335     for(list=0; list<2; list++){
1336         h->luma_weight_flag[list]   = 0;
1337         h->chroma_weight_flag[list] = 0;
1338         for(i=0; i<h->ref_count[list]; i++){
1339             int luma_weight_flag, chroma_weight_flag;
1340
1341             luma_weight_flag= get_bits1(&s->gb);
1342             if(luma_weight_flag){
1343                 h->luma_weight[list][i]= get_se_golomb(&s->gb);
1344                 h->luma_offset[list][i]= get_se_golomb(&s->gb);
1345                 if(   h->luma_weight[list][i] != luma_def
1346                    || h->luma_offset[list][i] != 0) {
1347                     h->use_weight= 1;
1348                     h->luma_weight_flag[list]= 1;
1349                 }
1350             }else{
1351                 h->luma_weight[list][i]= luma_def;
1352                 h->luma_offset[list][i]= 0;
1353             }
1354
1355             if(CHROMA){
1356                 chroma_weight_flag= get_bits1(&s->gb);
1357                 if(chroma_weight_flag){
1358                     int j;
1359                     for(j=0; j<2; j++){
1360                         h->chroma_weight[list][i][j]= get_se_golomb(&s->gb);
1361                         h->chroma_offset[list][i][j]= get_se_golomb(&s->gb);
1362                         if(   h->chroma_weight[list][i][j] != chroma_def
1363                            || h->chroma_offset[list][i][j] != 0) {
1364                             h->use_weight_chroma= 1;
1365                             h->chroma_weight_flag[list]= 1;
1366                         }
1367                     }
1368                 }else{
1369                     int j;
1370                     for(j=0; j<2; j++){
1371                         h->chroma_weight[list][i][j]= chroma_def;
1372                         h->chroma_offset[list][i][j]= 0;
1373                     }
1374                 }
1375             }
1376         }
1377         if(h->slice_type_nos != FF_B_TYPE) break;
1378     }
1379     h->use_weight= h->use_weight || h->use_weight_chroma;
1380     return 0;
1381 }
1382
1383 static void implicit_weight_table(H264Context *h){
1384     MpegEncContext * const s = &h->s;
1385     int ref0, ref1, i;
1386     int cur_poc = s->current_picture_ptr->poc;
1387
1388     for (i = 0; i < 2; i++) {
1389         h->luma_weight_flag[i]   = 0;
1390         h->chroma_weight_flag[i] = 0;
1391     }
1392
1393     if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
1394        && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
1395         h->use_weight= 0;
1396         h->use_weight_chroma= 0;
1397         return;
1398     }
1399
1400     h->use_weight= 2;
1401     h->use_weight_chroma= 2;
1402     h->luma_log2_weight_denom= 5;
1403     h->chroma_log2_weight_denom= 5;
1404
1405     for(ref0=0; ref0 < h->ref_count[0]; ref0++){
1406         int poc0 = h->ref_list[0][ref0].poc;
1407         for(ref1=0; ref1 < h->ref_count[1]; ref1++){
1408             int poc1 = h->ref_list[1][ref1].poc;
1409             int td = av_clip(poc1 - poc0, -128, 127);
1410             if(td){
1411                 int tb = av_clip(cur_poc - poc0, -128, 127);
1412                 int tx = (16384 + (FFABS(td) >> 1)) / td;
1413                 int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
1414                 if(dist_scale_factor < -64 || dist_scale_factor > 128)
1415                     h->implicit_weight[ref0][ref1] = 32;
1416                 else
1417                     h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
1418             }else
1419                 h->implicit_weight[ref0][ref1] = 32;
1420         }
1421     }
1422 }
1423
1424 /**
1425  * instantaneous decoder refresh.
1426  */
1427 static void idr(H264Context *h){
1428     ff_h264_remove_all_refs(h);
1429     h->prev_frame_num= 0;
1430     h->prev_frame_num_offset= 0;
1431     h->prev_poc_msb=
1432     h->prev_poc_lsb= 0;
1433 }
1434
1435 /* forget old pics after a seek */
1436 static void flush_dpb(AVCodecContext *avctx){
1437     H264Context *h= avctx->priv_data;
1438     int i;
1439     for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
1440         if(h->delayed_pic[i])
1441             h->delayed_pic[i]->reference= 0;
1442         h->delayed_pic[i]= NULL;
1443     }
1444     h->outputed_poc= INT_MIN;
1445     h->prev_interlaced_frame = 1;
1446     idr(h);
1447     if(h->s.current_picture_ptr)
1448         h->s.current_picture_ptr->reference= 0;
1449     h->s.first_field= 0;
1450     ff_h264_reset_sei(h);
1451     ff_mpeg_flush(avctx);
1452 }
1453
1454 static int init_poc(H264Context *h){
1455     MpegEncContext * const s = &h->s;
1456     const int max_frame_num= 1<<h->sps.log2_max_frame_num;
1457     int field_poc[2];
1458     Picture *cur = s->current_picture_ptr;
1459
1460     h->frame_num_offset= h->prev_frame_num_offset;
1461     if(h->frame_num < h->prev_frame_num)
1462         h->frame_num_offset += max_frame_num;
1463
1464     if(h->sps.poc_type==0){
1465         const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
1466
1467         if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
1468             h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1469         else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
1470             h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1471         else
1472             h->poc_msb = h->prev_poc_msb;
1473 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
1474         field_poc[0] =
1475         field_poc[1] = h->poc_msb + h->poc_lsb;
1476         if(s->picture_structure == PICT_FRAME)
1477             field_poc[1] += h->delta_poc_bottom;
1478     }else if(h->sps.poc_type==1){
1479         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1480         int i;
1481
1482         if(h->sps.poc_cycle_length != 0)
1483             abs_frame_num = h->frame_num_offset + h->frame_num;
1484         else
1485             abs_frame_num = 0;
1486
1487         if(h->nal_ref_idc==0 && abs_frame_num > 0)
1488             abs_frame_num--;
1489
1490         expected_delta_per_poc_cycle = 0;
1491         for(i=0; i < h->sps.poc_cycle_length; i++)
1492             expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
1493
1494         if(abs_frame_num > 0){
1495             int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1496             int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1497
1498             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1499             for(i = 0; i <= frame_num_in_poc_cycle; i++)
1500                 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
1501         } else
1502             expectedpoc = 0;
1503
1504         if(h->nal_ref_idc == 0)
1505             expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1506
1507         field_poc[0] = expectedpoc + h->delta_poc[0];
1508         field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1509
1510         if(s->picture_structure == PICT_FRAME)
1511             field_poc[1] += h->delta_poc[1];
1512     }else{
1513         int poc= 2*(h->frame_num_offset + h->frame_num);
1514
1515         if(!h->nal_ref_idc)
1516             poc--;
1517
1518         field_poc[0]= poc;
1519         field_poc[1]= poc;
1520     }
1521
1522     if(s->picture_structure != PICT_BOTTOM_FIELD)
1523         s->current_picture_ptr->field_poc[0]= field_poc[0];
1524     if(s->picture_structure != PICT_TOP_FIELD)
1525         s->current_picture_ptr->field_poc[1]= field_poc[1];
1526     cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
1527
1528     return 0;
1529 }
1530
1531
1532 /**
1533  * initialize scan tables
1534  */
1535 static void init_scan_tables(H264Context *h){
1536     MpegEncContext * const s = &h->s;
1537     int i;
1538     if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
1539         memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
1540         memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
1541     }else{
1542         for(i=0; i<16; i++){
1543 #define T(x) (x>>2) | ((x<<2) & 0xF)
1544             h->zigzag_scan[i] = T(zigzag_scan[i]);
1545             h-> field_scan[i] = T( field_scan[i]);
1546 #undef T
1547         }
1548     }
1549     if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
1550         memcpy(h->zigzag_scan8x8,       ff_zigzag_direct,     64*sizeof(uint8_t));
1551         memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
1552         memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
1553         memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
1554     }else{
1555         for(i=0; i<64; i++){
1556 #define T(x) (x>>3) | ((x&7)<<3)
1557             h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
1558             h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
1559             h->field_scan8x8[i]        = T(field_scan8x8[i]);
1560             h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
1561 #undef T
1562         }
1563     }
1564     if(h->sps.transform_bypass){ //FIXME same ugly
1565         h->zigzag_scan_q0          = zigzag_scan;
1566         h->zigzag_scan8x8_q0       = ff_zigzag_direct;
1567         h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
1568         h->field_scan_q0           = field_scan;
1569         h->field_scan8x8_q0        = field_scan8x8;
1570         h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
1571     }else{
1572         h->zigzag_scan_q0          = h->zigzag_scan;
1573         h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
1574         h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
1575         h->field_scan_q0           = h->field_scan;
1576         h->field_scan8x8_q0        = h->field_scan8x8;
1577         h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
1578     }
1579 }
1580
1581 static void field_end(H264Context *h){
1582     MpegEncContext * const s = &h->s;
1583     AVCodecContext * const avctx= s->avctx;
1584     s->mb_y= 0;
1585
1586     s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
1587     s->current_picture_ptr->pict_type= s->pict_type;
1588
1589     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1590         ff_vdpau_h264_set_reference_frames(s);
1591
1592     if(!s->dropable) {
1593         ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1594         h->prev_poc_msb= h->poc_msb;
1595         h->prev_poc_lsb= h->poc_lsb;
1596     }
1597     h->prev_frame_num_offset= h->frame_num_offset;
1598     h->prev_frame_num= h->frame_num;
1599
1600     if (avctx->hwaccel) {
1601         if (avctx->hwaccel->end_frame(avctx) < 0)
1602             av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1603     }
1604
1605     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1606         ff_vdpau_h264_picture_complete(s);
1607
1608     /*
1609      * FIXME: Error handling code does not seem to support interlaced
1610      * when slices span multiple rows
1611      * The ff_er_add_slice calls don't work right for bottom
1612      * fields; they cause massive erroneous error concealing
1613      * Error marking covers both fields (top and bottom).
1614      * This causes a mismatched s->error_count
1615      * and a bad error table. Further, the error count goes to
1616      * INT_MAX when called for bottom field, because mb_y is
1617      * past end by one (callers fault) and resync_mb_y != 0
1618      * causes problems for the first MB line, too.
1619      */
1620     if (!FIELD_PICTURE)
1621         ff_er_frame_end(s);
1622
1623     MPV_frame_end(s);
1624
1625     h->current_slice=0;
1626 }
1627
1628 /**
1629  * Replicates H264 "master" context to thread contexts.
1630  */
1631 static void clone_slice(H264Context *dst, H264Context *src)
1632 {
1633     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
1634     dst->s.current_picture_ptr  = src->s.current_picture_ptr;
1635     dst->s.current_picture      = src->s.current_picture;
1636     dst->s.linesize             = src->s.linesize;
1637     dst->s.uvlinesize           = src->s.uvlinesize;
1638     dst->s.first_field          = src->s.first_field;
1639
1640     dst->prev_poc_msb           = src->prev_poc_msb;
1641     dst->prev_poc_lsb           = src->prev_poc_lsb;
1642     dst->prev_frame_num_offset  = src->prev_frame_num_offset;
1643     dst->prev_frame_num         = src->prev_frame_num;
1644     dst->short_ref_count        = src->short_ref_count;
1645
1646     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
1647     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
1648     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1649     memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
1650
1651     memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
1652     memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
1653 }
1654
1655 /**
1656  * decodes a slice header.
1657  * This will also call MPV_common_init() and frame_start() as needed.
1658  *
1659  * @param h h264context
1660  * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
1661  *
1662  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1663  */
1664 static int decode_slice_header(H264Context *h, H264Context *h0){
1665     MpegEncContext * const s = &h->s;
1666     MpegEncContext * const s0 = &h0->s;
1667     unsigned int first_mb_in_slice;
1668     unsigned int pps_id;
1669     int num_ref_idx_active_override_flag;
1670     unsigned int slice_type, tmp, i, j;
1671     int default_ref_list_done = 0;
1672     int last_pic_structure;
1673
1674     s->dropable= h->nal_ref_idc == 0;
1675
1676     if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
1677         s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
1678         s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
1679     }else{
1680         s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
1681         s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
1682     }
1683
1684     first_mb_in_slice= get_ue_golomb(&s->gb);
1685
1686     if(first_mb_in_slice == 0){ //FIXME better field boundary detection
1687         if(h0->current_slice && FIELD_PICTURE){
1688             field_end(h);
1689         }
1690
1691         h0->current_slice = 0;
1692         if (!s0->first_field)
1693             s->current_picture_ptr= NULL;
1694     }
1695
1696     slice_type= get_ue_golomb_31(&s->gb);
1697     if(slice_type > 9){
1698         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);
1699         return -1;
1700     }
1701     if(slice_type > 4){
1702         slice_type -= 5;
1703         h->slice_type_fixed=1;
1704     }else
1705         h->slice_type_fixed=0;
1706
1707     slice_type= golomb_to_pict_type[ slice_type ];
1708     if (slice_type == FF_I_TYPE
1709         || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
1710         default_ref_list_done = 1;
1711     }
1712     h->slice_type= slice_type;
1713     h->slice_type_nos= slice_type & 3;
1714
1715     s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
1716
1717     pps_id= get_ue_golomb(&s->gb);
1718     if(pps_id>=MAX_PPS_COUNT){
1719         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
1720         return -1;
1721     }
1722     if(!h0->pps_buffers[pps_id]) {
1723         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
1724         return -1;
1725     }
1726     h->pps= *h0->pps_buffers[pps_id];
1727
1728     if(!h0->sps_buffers[h->pps.sps_id]) {
1729         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
1730         return -1;
1731     }
1732     h->sps = *h0->sps_buffers[h->pps.sps_id];
1733
1734     if(h == h0 && h->dequant_coeff_pps != pps_id){
1735         h->dequant_coeff_pps = pps_id;
1736         init_dequant_tables(h);
1737     }
1738
1739     s->mb_width= h->sps.mb_width;
1740     s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1741
1742     h->b_stride=  s->mb_width*4;
1743     h->b8_stride= s->mb_width*2;
1744
1745     s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
1746     if(h->sps.frame_mbs_only_flag)
1747         s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
1748     else
1749         s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
1750
1751     if (s->context_initialized
1752         && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
1753         if(h != h0)
1754             return -1;   // width / height changed during parallelized decoding
1755         free_tables(h);
1756         flush_dpb(s->avctx);
1757         MPV_common_end(s);
1758     }
1759     if (!s->context_initialized) {
1760         if(h != h0)
1761             return -1;  // we cant (re-)initialize context during parallel decoding
1762
1763         avcodec_set_dimensions(s->avctx, s->width, s->height);
1764         s->avctx->sample_aspect_ratio= h->sps.sar;
1765         if(!s->avctx->sample_aspect_ratio.den)
1766             s->avctx->sample_aspect_ratio.den = 1;
1767
1768         if(h->sps.video_signal_type_present_flag){
1769             s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
1770             if(h->sps.colour_description_present_flag){
1771                 s->avctx->color_primaries = h->sps.color_primaries;
1772                 s->avctx->color_trc       = h->sps.color_trc;
1773                 s->avctx->colorspace      = h->sps.colorspace;
1774             }
1775         }
1776
1777         if(h->sps.timing_info_present_flag){
1778             int64_t den= h->sps.time_scale;
1779             if(h->x264_build < 44U)
1780                 den *= 2;
1781             av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
1782                       h->sps.num_units_in_tick, den, 1<<30);
1783         }
1784         s->avctx->pix_fmt = s->avctx->get_format(s->avctx, s->avctx->codec->pix_fmts);
1785         s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
1786
1787         if (MPV_common_init(s) < 0)
1788             return -1;
1789         s->first_field = 0;
1790         h->prev_interlaced_frame = 1;
1791
1792         init_scan_tables(h);
1793         ff_h264_alloc_tables(h);
1794
1795         for(i = 1; i < s->avctx->thread_count; i++) {
1796             H264Context *c;
1797             c = h->thread_context[i] = av_malloc(sizeof(H264Context));
1798             memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
1799             memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
1800             c->sps = h->sps;
1801             c->pps = h->pps;
1802             init_scan_tables(c);
1803             clone_tables(c, h);
1804         }
1805
1806         for(i = 0; i < s->avctx->thread_count; i++)
1807             if(context_init(h->thread_context[i]) < 0)
1808                 return -1;
1809     }
1810
1811     h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
1812
1813     h->mb_mbaff = 0;
1814     h->mb_aff_frame = 0;
1815     last_pic_structure = s0->picture_structure;
1816     if(h->sps.frame_mbs_only_flag){
1817         s->picture_structure= PICT_FRAME;
1818     }else{
1819         if(get_bits1(&s->gb)) { //field_pic_flag
1820             s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
1821         } else {
1822             s->picture_structure= PICT_FRAME;
1823             h->mb_aff_frame = h->sps.mb_aff;
1824         }
1825     }
1826     h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
1827
1828     if(h0->current_slice == 0){
1829         while(h->frame_num !=  h->prev_frame_num &&
1830               h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
1831             av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
1832             if (ff_h264_frame_start(h) < 0)
1833                 return -1;
1834             h->prev_frame_num++;
1835             h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
1836             s->current_picture_ptr->frame_num= h->prev_frame_num;
1837             ff_h264_execute_ref_pic_marking(h, NULL, 0);
1838         }
1839
1840         /* See if we have a decoded first field looking for a pair... */
1841         if (s0->first_field) {
1842             assert(s0->current_picture_ptr);
1843             assert(s0->current_picture_ptr->data[0]);
1844             assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
1845
1846             /* figure out if we have a complementary field pair */
1847             if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
1848                 /*
1849                  * Previous field is unmatched. Don't display it, but let it
1850                  * remain for reference if marked as such.
1851                  */
1852                 s0->current_picture_ptr = NULL;
1853                 s0->first_field = FIELD_PICTURE;
1854
1855             } else {
1856                 if (h->nal_ref_idc &&
1857                         s0->current_picture_ptr->reference &&
1858                         s0->current_picture_ptr->frame_num != h->frame_num) {
1859                     /*
1860                      * This and previous field were reference, but had
1861                      * different frame_nums. Consider this field first in
1862                      * pair. Throw away previous field except for reference
1863                      * purposes.
1864                      */
1865                     s0->first_field = 1;
1866                     s0->current_picture_ptr = NULL;
1867
1868                 } else {
1869                     /* Second field in complementary pair */
1870                     s0->first_field = 0;
1871                 }
1872             }
1873
1874         } else {
1875             /* Frame or first field in a potentially complementary pair */
1876             assert(!s0->current_picture_ptr);
1877             s0->first_field = FIELD_PICTURE;
1878         }
1879
1880         if((!FIELD_PICTURE || s0->first_field) && ff_h264_frame_start(h) < 0) {
1881             s0->first_field = 0;
1882             return -1;
1883         }
1884     }
1885     if(h != h0)
1886         clone_slice(h, h0);
1887
1888     s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
1889
1890     assert(s->mb_num == s->mb_width * s->mb_height);
1891     if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
1892        first_mb_in_slice                    >= s->mb_num){
1893         av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1894         return -1;
1895     }
1896     s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
1897     s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
1898     if (s->picture_structure == PICT_BOTTOM_FIELD)
1899         s->resync_mb_y = s->mb_y = s->mb_y + 1;
1900     assert(s->mb_y < s->mb_height);
1901
1902     if(s->picture_structure==PICT_FRAME){
1903         h->curr_pic_num=   h->frame_num;
1904         h->max_pic_num= 1<< h->sps.log2_max_frame_num;
1905     }else{
1906         h->curr_pic_num= 2*h->frame_num + 1;
1907         h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
1908     }
1909
1910     if(h->nal_unit_type == NAL_IDR_SLICE){
1911         get_ue_golomb(&s->gb); /* idr_pic_id */
1912     }
1913
1914     if(h->sps.poc_type==0){
1915         h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
1916
1917         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
1918             h->delta_poc_bottom= get_se_golomb(&s->gb);
1919         }
1920     }
1921
1922     if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
1923         h->delta_poc[0]= get_se_golomb(&s->gb);
1924
1925         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
1926             h->delta_poc[1]= get_se_golomb(&s->gb);
1927     }
1928
1929     init_poc(h);
1930
1931     if(h->pps.redundant_pic_cnt_present){
1932         h->redundant_pic_count= get_ue_golomb(&s->gb);
1933     }
1934
1935     //set defaults, might be overridden a few lines later
1936     h->ref_count[0]= h->pps.ref_count[0];
1937     h->ref_count[1]= h->pps.ref_count[1];
1938
1939     if(h->slice_type_nos != FF_I_TYPE){
1940         if(h->slice_type_nos == FF_B_TYPE){
1941             h->direct_spatial_mv_pred= get_bits1(&s->gb);
1942         }
1943         num_ref_idx_active_override_flag= get_bits1(&s->gb);
1944
1945         if(num_ref_idx_active_override_flag){
1946             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
1947             if(h->slice_type_nos==FF_B_TYPE)
1948                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
1949
1950             if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
1951                 av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
1952                 h->ref_count[0]= h->ref_count[1]= 1;
1953                 return -1;
1954             }
1955         }
1956         if(h->slice_type_nos == FF_B_TYPE)
1957             h->list_count= 2;
1958         else
1959             h->list_count= 1;
1960     }else
1961         h->list_count= 0;
1962
1963     if(!default_ref_list_done){
1964         ff_h264_fill_default_ref_list(h);
1965     }
1966
1967     if(h->slice_type_nos!=FF_I_TYPE && ff_h264_decode_ref_pic_list_reordering(h) < 0)
1968         return -1;
1969
1970     if(h->slice_type_nos!=FF_I_TYPE){
1971         s->last_picture_ptr= &h->ref_list[0][0];
1972         ff_copy_picture(&s->last_picture, s->last_picture_ptr);
1973     }
1974     if(h->slice_type_nos==FF_B_TYPE){
1975         s->next_picture_ptr= &h->ref_list[1][0];
1976         ff_copy_picture(&s->next_picture, s->next_picture_ptr);
1977     }
1978
1979     if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
1980        ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
1981         pred_weight_table(h);
1982     else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE)
1983         implicit_weight_table(h);
1984     else {
1985         h->use_weight = 0;
1986         for (i = 0; i < 2; i++) {
1987             h->luma_weight_flag[i]   = 0;
1988             h->chroma_weight_flag[i] = 0;
1989         }
1990     }
1991
1992     if(h->nal_ref_idc)
1993         ff_h264_decode_ref_pic_marking(h0, &s->gb);
1994
1995     if(FRAME_MBAFF)
1996         ff_h264_fill_mbaff_ref_list(h);
1997
1998     if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
1999         ff_h264_direct_dist_scale_factor(h);
2000     ff_h264_direct_ref_list_init(h);
2001
2002     if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
2003         tmp = get_ue_golomb_31(&s->gb);
2004         if(tmp > 2){
2005             av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
2006             return -1;
2007         }
2008         h->cabac_init_idc= tmp;
2009     }
2010
2011     h->last_qscale_diff = 0;
2012     tmp = h->pps.init_qp + get_se_golomb(&s->gb);
2013     if(tmp>51){
2014         av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
2015         return -1;
2016     }
2017     s->qscale= tmp;
2018     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2019     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2020     //FIXME qscale / qp ... stuff
2021     if(h->slice_type == FF_SP_TYPE){
2022         get_bits1(&s->gb); /* sp_for_switch_flag */
2023     }
2024     if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
2025         get_se_golomb(&s->gb); /* slice_qs_delta */
2026     }
2027
2028     h->deblocking_filter = 1;
2029     h->slice_alpha_c0_offset = 52;
2030     h->slice_beta_offset = 52;
2031     if( h->pps.deblocking_filter_parameters_present ) {
2032         tmp= get_ue_golomb_31(&s->gb);
2033         if(tmp > 2){
2034             av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
2035             return -1;
2036         }
2037         h->deblocking_filter= tmp;
2038         if(h->deblocking_filter < 2)
2039             h->deblocking_filter^= 1; // 1<->0
2040
2041         if( h->deblocking_filter ) {
2042             h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
2043             h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
2044             if(   h->slice_alpha_c0_offset > 104U
2045                || h->slice_beta_offset     > 104U){
2046                 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);
2047                 return -1;
2048             }
2049         }
2050     }
2051
2052     if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
2053        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
2054        ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
2055        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2056         h->deblocking_filter= 0;
2057
2058     if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
2059         if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
2060             /* Cheat slightly for speed:
2061                Do not bother to deblock across slices. */
2062             h->deblocking_filter = 2;
2063         } else {
2064             h0->max_contexts = 1;
2065             if(!h0->single_decode_warning) {
2066                 av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
2067                 h0->single_decode_warning = 1;
2068             }
2069             if(h != h0)
2070                 return 1; // deblocking switched inside frame
2071         }
2072     }
2073     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]);
2074
2075 #if 0 //FMO
2076     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
2077         slice_group_change_cycle= get_bits(&s->gb, ?);
2078 #endif
2079
2080     h0->last_slice_type = slice_type;
2081     h->slice_num = ++h0->current_slice;
2082     if(h->slice_num >= MAX_SLICES){
2083         av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
2084     }
2085
2086     for(j=0; j<2; j++){
2087         int id_list[16];
2088         int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
2089         for(i=0; i<16; i++){
2090             id_list[i]= 60;
2091             if(h->ref_list[j][i].data[0]){
2092                 int k;
2093                 uint8_t *base= h->ref_list[j][i].base[0];
2094                 for(k=0; k<h->short_ref_count; k++)
2095                     if(h->short_ref[k]->base[0] == base){
2096                         id_list[i]= k;
2097                         break;
2098                     }
2099                 for(k=0; k<h->long_ref_count; k++)
2100                     if(h->long_ref[k] && h->long_ref[k]->base[0] == base){
2101                         id_list[i]= h->short_ref_count + k;
2102                         break;
2103                     }
2104             }
2105         }
2106
2107         ref2frm[0]=
2108         ref2frm[1]= -1;
2109         for(i=0; i<16; i++)
2110             ref2frm[i+2]= 4*id_list[i]
2111                           +(h->ref_list[j][i].reference&3);
2112         ref2frm[18+0]=
2113         ref2frm[18+1]= -1;
2114         for(i=16; i<48; i++)
2115             ref2frm[i+4]= 4*id_list[(i-16)>>1]
2116                           +(h->ref_list[j][i].reference&3);
2117     }
2118
2119     h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
2120     h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
2121
2122     s->avctx->refs= h->sps.ref_frame_count;
2123
2124     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2125         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",
2126                h->slice_num,
2127                (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
2128                first_mb_in_slice,
2129                av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
2130                pps_id, h->frame_num,
2131                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
2132                h->ref_count[0], h->ref_count[1],
2133                s->qscale,
2134                h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
2135                h->use_weight,
2136                h->use_weight==1 && h->use_weight_chroma ? "c" : "",
2137                h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
2138                );
2139     }
2140
2141     return 0;
2142 }
2143
2144 int ff_h264_get_slice_type(const H264Context *h)
2145 {
2146     switch (h->slice_type) {
2147     case FF_P_TYPE:  return 0;
2148     case FF_B_TYPE:  return 1;
2149     case FF_I_TYPE:  return 2;
2150     case FF_SP_TYPE: return 3;
2151     case FF_SI_TYPE: return 4;
2152     default:         return -1;
2153     }
2154 }
2155
2156 static void loop_filter(H264Context *h){
2157     MpegEncContext * const s = &h->s;
2158     uint8_t  *dest_y, *dest_cb, *dest_cr;
2159     int linesize, uvlinesize, mb_x, mb_y;
2160     const int end_mb_y= s->mb_y + FRAME_MBAFF;
2161     const int old_slice_type= h->slice_type;
2162
2163     if(h->deblocking_filter) {
2164         for(mb_x= 0; mb_x<s->mb_width; mb_x++){
2165             for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
2166                 int mb_xy, mb_type;
2167                 mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
2168                 h->slice_num= h->slice_table[mb_xy];
2169                 mb_type= s->current_picture.mb_type[mb_xy];
2170                 h->list_count= h->list_counts[mb_xy];
2171
2172                 if(FRAME_MBAFF)
2173                     h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2174
2175                 s->mb_x= mb_x;
2176                 s->mb_y= mb_y;
2177                 dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2178                 dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2179                 dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2180                     //FIXME simplify above
2181
2182                 if (MB_FIELD) {
2183                     linesize   = h->mb_linesize   = s->linesize * 2;
2184                     uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2185                     if(mb_y&1){ //FIXME move out of this function?
2186                         dest_y -= s->linesize*15;
2187                         dest_cb-= s->uvlinesize*7;
2188                         dest_cr-= s->uvlinesize*7;
2189                     }
2190                 } else {
2191                     linesize   = h->mb_linesize   = s->linesize;
2192                     uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2193                 }
2194                 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
2195                 if(fill_filter_caches(h, mb_type))
2196                     continue;
2197                 h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2198                 h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2199
2200                 if (FRAME_MBAFF) {
2201                     ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2202                 } else {
2203                     ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2204                 }
2205             }
2206         }
2207     }
2208     h->slice_type= old_slice_type;
2209     s->mb_x= 0;
2210     s->mb_y= end_mb_y - FRAME_MBAFF;
2211 }
2212
2213 static int decode_slice(struct AVCodecContext *avctx, void *arg){
2214     H264Context *h = *(void**)arg;
2215     MpegEncContext * const s = &h->s;
2216     const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
2217
2218     s->mb_skip_run= -1;
2219
2220     h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
2221                     (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
2222
2223     if( h->pps.cabac ) {
2224         /* realign */
2225         align_get_bits( &s->gb );
2226
2227         /* init cabac */
2228         ff_init_cabac_states( &h->cabac);
2229         ff_init_cabac_decoder( &h->cabac,
2230                                s->gb.buffer + get_bits_count(&s->gb)/8,
2231                                (get_bits_left(&s->gb) + 7)/8);
2232
2233         ff_h264_init_cabac_states(h);
2234
2235         for(;;){
2236 //START_TIMER
2237             int ret = ff_h264_decode_mb_cabac(h);
2238             int eos;
2239 //STOP_TIMER("decode_mb_cabac")
2240
2241             if(ret>=0) ff_h264_hl_decode_mb(h);
2242
2243             if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
2244                 s->mb_y++;
2245
2246                 ret = ff_h264_decode_mb_cabac(h);
2247
2248                 if(ret>=0) ff_h264_hl_decode_mb(h);
2249                 s->mb_y--;
2250             }
2251             eos = get_cabac_terminate( &h->cabac );
2252
2253             if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
2254                 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);
2255                 return 0;
2256             }
2257             if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2258                 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);
2259                 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);
2260                 return -1;
2261             }
2262
2263             if( ++s->mb_x >= s->mb_width ) {
2264                 s->mb_x = 0;
2265                 loop_filter(h);
2266                 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2267                 ++s->mb_y;
2268                 if(FIELD_OR_MBAFF_PICTURE) {
2269                     ++s->mb_y;
2270                 }
2271             }
2272
2273             if( eos || s->mb_y >= s->mb_height ) {
2274                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2275                 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);
2276                 return 0;
2277             }
2278         }
2279
2280     } else {
2281         for(;;){
2282             int ret = ff_h264_decode_mb_cavlc(h);
2283
2284             if(ret>=0) ff_h264_hl_decode_mb(h);
2285
2286             if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
2287                 s->mb_y++;
2288                 ret = ff_h264_decode_mb_cavlc(h);
2289
2290                 if(ret>=0) ff_h264_hl_decode_mb(h);
2291                 s->mb_y--;
2292             }
2293
2294             if(ret<0){
2295                 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2296                 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);
2297
2298                 return -1;
2299             }
2300
2301             if(++s->mb_x >= s->mb_width){
2302                 s->mb_x=0;
2303                 loop_filter(h);
2304                 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2305                 ++s->mb_y;
2306                 if(FIELD_OR_MBAFF_PICTURE) {
2307                     ++s->mb_y;
2308                 }
2309                 if(s->mb_y >= s->mb_height){
2310                     tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2311
2312                     if(get_bits_count(&s->gb) == s->gb.size_in_bits ) {
2313                         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);
2314
2315                         return 0;
2316                     }else{
2317                         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);
2318
2319                         return -1;
2320                     }
2321                 }
2322             }
2323
2324             if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
2325                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2326                 if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
2327                     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);
2328
2329                     return 0;
2330                 }else{
2331                     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);
2332
2333                     return -1;
2334                 }
2335             }
2336         }
2337     }
2338
2339 #if 0
2340     for(;s->mb_y < s->mb_height; s->mb_y++){
2341         for(;s->mb_x < s->mb_width; s->mb_x++){
2342             int ret= decode_mb(h);
2343
2344             ff_h264_hl_decode_mb(h);
2345
2346             if(ret<0){
2347                 av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2348                 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);
2349
2350                 return -1;
2351             }
2352
2353             if(++s->mb_x >= s->mb_width){
2354                 s->mb_x=0;
2355                 if(++s->mb_y >= s->mb_height){
2356                     if(get_bits_count(s->gb) == s->gb.size_in_bits){
2357                         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);
2358
2359                         return 0;
2360                     }else{
2361                         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);
2362
2363                         return -1;
2364                     }
2365                 }
2366             }
2367
2368             if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
2369                 if(get_bits_count(s->gb) == s->gb.size_in_bits){
2370                     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);
2371
2372                     return 0;
2373                 }else{
2374                     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);
2375
2376                     return -1;
2377                 }
2378             }
2379         }
2380         s->mb_x=0;
2381         ff_draw_horiz_band(s, 16*s->mb_y, 16);
2382     }
2383 #endif
2384     return -1; //not reached
2385 }
2386
2387 /**
2388  * Call decode_slice() for each context.
2389  *
2390  * @param h h264 master context
2391  * @param context_count number of contexts to execute
2392  */
2393 static void execute_decode_slices(H264Context *h, int context_count){
2394     MpegEncContext * const s = &h->s;
2395     AVCodecContext * const avctx= s->avctx;
2396     H264Context *hx;
2397     int i;
2398
2399     if (s->avctx->hwaccel)
2400         return;
2401     if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2402         return;
2403     if(context_count == 1) {
2404         decode_slice(avctx, &h);
2405     } else {
2406         for(i = 1; i < context_count; i++) {
2407             hx = h->thread_context[i];
2408             hx->s.error_recognition = avctx->error_recognition;
2409             hx->s.error_count = 0;
2410         }
2411
2412         avctx->execute(avctx, (void *)decode_slice,
2413                        h->thread_context, NULL, context_count, sizeof(void*));
2414
2415         /* pull back stuff from slices to master context */
2416         hx = h->thread_context[context_count - 1];
2417         s->mb_x = hx->s.mb_x;
2418         s->mb_y = hx->s.mb_y;
2419         s->dropable = hx->s.dropable;
2420         s->picture_structure = hx->s.picture_structure;
2421         for(i = 1; i < context_count; i++)
2422             h->s.error_count += h->thread_context[i]->s.error_count;
2423     }
2424 }
2425
2426
2427 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
2428     MpegEncContext * const s = &h->s;
2429     AVCodecContext * const avctx= s->avctx;
2430     int buf_index=0;
2431     H264Context *hx; ///< thread context
2432     int context_count = 0;
2433     int next_avc= h->is_avc ? 0 : buf_size;
2434
2435     h->max_contexts = avctx->thread_count;
2436 #if 0
2437     int i;
2438     for(i=0; i<50; i++){
2439         av_log(NULL, AV_LOG_ERROR,"%02X ", buf[i]);
2440     }
2441 #endif
2442     if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
2443         h->current_slice = 0;
2444         if (!s->first_field)
2445             s->current_picture_ptr= NULL;
2446         ff_h264_reset_sei(h);
2447     }
2448
2449     for(;;){
2450         int consumed;
2451         int dst_length;
2452         int bit_length;
2453         const uint8_t *ptr;
2454         int i, nalsize = 0;
2455         int err;
2456
2457         if(buf_index >= next_avc) {
2458             if(buf_index >= buf_size) break;
2459             nalsize = 0;
2460             for(i = 0; i < h->nal_length_size; i++)
2461                 nalsize = (nalsize << 8) | buf[buf_index++];
2462             if(nalsize <= 1 || nalsize > buf_size - buf_index){
2463                 if(nalsize == 1){
2464                     buf_index++;
2465                     continue;
2466                 }else{
2467                     av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
2468                     break;
2469                 }
2470             }
2471             next_avc= buf_index + nalsize;
2472         } else {
2473             // start code prefix search
2474             for(; buf_index + 3 < next_avc; buf_index++){
2475                 // This should always succeed in the first iteration.
2476                 if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
2477                     break;
2478             }
2479
2480             if(buf_index+3 >= buf_size) break;
2481
2482             buf_index+=3;
2483             if(buf_index >= next_avc) continue;
2484         }
2485
2486         hx = h->thread_context[context_count];
2487
2488         ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
2489         if (ptr==NULL || dst_length < 0){
2490             return -1;
2491         }
2492         i= buf_index + consumed;
2493         if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
2494            buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
2495             s->workaround_bugs |= FF_BUG_TRUNCATED;
2496
2497         if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
2498         while(ptr[dst_length - 1] == 0 && dst_length > 0)
2499             dst_length--;
2500         }
2501         bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
2502
2503         if(s->avctx->debug&FF_DEBUG_STARTCODE){
2504             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);
2505         }
2506
2507         if (h->is_avc && (nalsize != consumed) && nalsize){
2508             av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
2509         }
2510
2511         buf_index += consumed;
2512
2513         if(  (s->hurry_up == 1 && h->nal_ref_idc  == 0) //FIXME do not discard SEI id
2514            ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0))
2515             continue;
2516
2517       again:
2518         err = 0;
2519         switch(hx->nal_unit_type){
2520         case NAL_IDR_SLICE:
2521             if (h->nal_unit_type != NAL_IDR_SLICE) {
2522                 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
2523                 return -1;
2524             }
2525             idr(h); //FIXME ensure we don't loose some frames if there is reordering
2526         case NAL_SLICE:
2527             init_get_bits(&hx->s.gb, ptr, bit_length);
2528             hx->intra_gb_ptr=
2529             hx->inter_gb_ptr= &hx->s.gb;
2530             hx->s.data_partitioning = 0;
2531
2532             if((err = decode_slice_header(hx, h)))
2533                break;
2534
2535             avctx->profile = hx->sps.profile_idc;
2536             avctx->level   = hx->sps.level_idc;
2537
2538             if (s->avctx->hwaccel && h->current_slice == 1) {
2539                 if (s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
2540                     return -1;
2541             }
2542
2543             s->current_picture_ptr->key_frame |=
2544                     (hx->nal_unit_type == NAL_IDR_SLICE) ||
2545                     (h->sei_recovery_frame_cnt >= 0);
2546             if(hx->redundant_pic_count==0 && hx->s.hurry_up < 5
2547                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2548                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2549                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2550                && avctx->skip_frame < AVDISCARD_ALL){
2551                 if(avctx->hwaccel) {
2552                     if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
2553                         return -1;
2554                 }else
2555                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
2556                     static const uint8_t start_code[] = {0x00, 0x00, 0x01};
2557                     ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
2558                     ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
2559                 }else
2560                     context_count++;
2561             }
2562             break;
2563         case NAL_DPA:
2564             init_get_bits(&hx->s.gb, ptr, bit_length);
2565             hx->intra_gb_ptr=
2566             hx->inter_gb_ptr= NULL;
2567
2568             if ((err = decode_slice_header(hx, h)) < 0)
2569                 break;
2570
2571             avctx->profile = hx->sps.profile_idc;
2572             avctx->level   = hx->sps.level_idc;
2573
2574             hx->s.data_partitioning = 1;
2575
2576             break;
2577         case NAL_DPB:
2578             init_get_bits(&hx->intra_gb, ptr, bit_length);
2579             hx->intra_gb_ptr= &hx->intra_gb;
2580             break;
2581         case NAL_DPC:
2582             init_get_bits(&hx->inter_gb, ptr, bit_length);
2583             hx->inter_gb_ptr= &hx->inter_gb;
2584
2585             if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
2586                && s->context_initialized
2587                && s->hurry_up < 5
2588                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2589                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2590                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2591                && avctx->skip_frame < AVDISCARD_ALL)
2592                 context_count++;
2593             break;
2594         case NAL_SEI:
2595             init_get_bits(&s->gb, ptr, bit_length);
2596             ff_h264_decode_sei(h);
2597             break;
2598         case NAL_SPS:
2599             init_get_bits(&s->gb, ptr, bit_length);
2600             ff_h264_decode_seq_parameter_set(h);
2601
2602             if(s->flags& CODEC_FLAG_LOW_DELAY)
2603                 s->low_delay=1;
2604
2605             if(avctx->has_b_frames < 2)
2606                 avctx->has_b_frames= !s->low_delay;
2607             break;
2608         case NAL_PPS:
2609             init_get_bits(&s->gb, ptr, bit_length);
2610
2611             ff_h264_decode_picture_parameter_set(h, bit_length);
2612
2613             break;
2614         case NAL_AUD:
2615         case NAL_END_SEQUENCE:
2616         case NAL_END_STREAM:
2617         case NAL_FILLER_DATA:
2618         case NAL_SPS_EXT:
2619         case NAL_AUXILIARY_SLICE:
2620             break;
2621         default:
2622             av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
2623         }
2624
2625         if(context_count == h->max_contexts) {
2626             execute_decode_slices(h, context_count);
2627             context_count = 0;
2628         }
2629
2630         if (err < 0)
2631             av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
2632         else if(err == 1) {
2633             /* Slice could not be decoded in parallel mode, copy down
2634              * NAL unit stuff to context 0 and restart. Note that
2635              * rbsp_buffer is not transferred, but since we no longer
2636              * run in parallel mode this should not be an issue. */
2637             h->nal_unit_type = hx->nal_unit_type;
2638             h->nal_ref_idc   = hx->nal_ref_idc;
2639             hx = h;
2640             goto again;
2641         }
2642     }
2643     if(context_count)
2644         execute_decode_slices(h, context_count);
2645     return buf_index;
2646 }
2647
2648 /**
2649  * returns the number of bytes consumed for building the current frame
2650  */
2651 static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
2652         if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
2653         if(pos+10>buf_size) pos=buf_size; // oops ;)
2654
2655         return pos;
2656 }
2657
2658 static int decode_frame(AVCodecContext *avctx,
2659                              void *data, int *data_size,
2660                              AVPacket *avpkt)
2661 {
2662     const uint8_t *buf = avpkt->data;
2663     int buf_size = avpkt->size;
2664     H264Context *h = avctx->priv_data;
2665     MpegEncContext *s = &h->s;
2666     AVFrame *pict = data;
2667     int buf_index;
2668
2669     s->flags= avctx->flags;
2670     s->flags2= avctx->flags2;
2671
2672    /* end of stream, output what is still in the buffers */
2673     if (buf_size == 0) {
2674         Picture *out;
2675         int i, out_idx;
2676
2677 //FIXME factorize this with the output code below
2678         out = h->delayed_pic[0];
2679         out_idx = 0;
2680         for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2681             if(h->delayed_pic[i]->poc < out->poc){
2682                 out = h->delayed_pic[i];
2683                 out_idx = i;
2684             }
2685
2686         for(i=out_idx; h->delayed_pic[i]; i++)
2687             h->delayed_pic[i] = h->delayed_pic[i+1];
2688
2689         if(out){
2690             *data_size = sizeof(AVFrame);
2691             *pict= *(AVFrame*)out;
2692         }
2693
2694         return 0;
2695     }
2696
2697     if(h->is_avc && !h->got_avcC) {
2698         int i, cnt, nalsize;
2699         unsigned char *p = avctx->extradata;
2700         if(avctx->extradata_size < 7) {
2701             av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
2702             return -1;
2703         }
2704         if(*p != 1) {
2705             av_log(avctx, AV_LOG_ERROR, "Unknown avcC version %d\n", *p);
2706             return -1;
2707         }
2708         /* sps and pps in the avcC always have length coded with 2 bytes,
2709            so put a fake nal_length_size = 2 while parsing them */
2710         h->nal_length_size = 2;
2711         // Decode sps from avcC
2712         cnt = *(p+5) & 0x1f; // Number of sps
2713         p += 6;
2714         for (i = 0; i < cnt; i++) {
2715             nalsize = AV_RB16(p) + 2;
2716             if(decode_nal_units(h, p, nalsize) < 0) {
2717                 av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
2718                 return -1;
2719             }
2720             p += nalsize;
2721         }
2722         // Decode pps from avcC
2723         cnt = *(p++); // Number of pps
2724         for (i = 0; i < cnt; i++) {
2725             nalsize = AV_RB16(p) + 2;
2726             if(decode_nal_units(h, p, nalsize)  != nalsize) {
2727                 av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
2728                 return -1;
2729             }
2730             p += nalsize;
2731         }
2732         // Now store right nal length size, that will be use to parse all other nals
2733         h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
2734         // Do not reparse avcC
2735         h->got_avcC = 1;
2736     }
2737
2738     if(!h->got_avcC && !h->is_avc && s->avctx->extradata_size){
2739         if(decode_nal_units(h, s->avctx->extradata, s->avctx->extradata_size) < 0)
2740             return -1;
2741         h->got_avcC = 1;
2742     }
2743
2744     buf_index=decode_nal_units(h, buf, buf_size);
2745     if(buf_index < 0)
2746         return -1;
2747
2748     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
2749         if (avctx->skip_frame >= AVDISCARD_NONREF || s->hurry_up) return 0;
2750         av_log(avctx, AV_LOG_ERROR, "no frame!\n");
2751         return -1;
2752     }
2753
2754     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
2755         Picture *out = s->current_picture_ptr;
2756         Picture *cur = s->current_picture_ptr;
2757         int i, pics, out_of_order, out_idx;
2758
2759         field_end(h);
2760
2761         if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
2762             /* Wait for second field. */
2763             *data_size = 0;
2764
2765         } else {
2766             cur->interlaced_frame = 0;
2767             cur->repeat_pict = 0;
2768
2769             /* Signal interlacing information externally. */
2770             /* Prioritize picture timing SEI information over used decoding process if it exists. */
2771
2772             if(h->sps.pic_struct_present_flag){
2773                 switch (h->sei_pic_struct)
2774                 {
2775                 case SEI_PIC_STRUCT_FRAME:
2776                     break;
2777                 case SEI_PIC_STRUCT_TOP_FIELD:
2778                 case SEI_PIC_STRUCT_BOTTOM_FIELD:
2779                     cur->interlaced_frame = 1;
2780                     break;
2781                 case SEI_PIC_STRUCT_TOP_BOTTOM:
2782                 case SEI_PIC_STRUCT_BOTTOM_TOP:
2783                     if (FIELD_OR_MBAFF_PICTURE)
2784                         cur->interlaced_frame = 1;
2785                     else
2786                         // try to flag soft telecine progressive
2787                         cur->interlaced_frame = h->prev_interlaced_frame;
2788                     break;
2789                 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
2790                 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
2791                     // Signal the possibility of telecined film externally (pic_struct 5,6)
2792                     // From these hints, let the applications decide if they apply deinterlacing.
2793                     cur->repeat_pict = 1;
2794                     break;
2795                 case SEI_PIC_STRUCT_FRAME_DOUBLING:
2796                     // Force progressive here, as doubling interlaced frame is a bad idea.
2797                     cur->repeat_pict = 2;
2798                     break;
2799                 case SEI_PIC_STRUCT_FRAME_TRIPLING:
2800                     cur->repeat_pict = 4;
2801                     break;
2802                 }
2803
2804                 if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
2805                     cur->interlaced_frame = (h->sei_ct_type & (1<<1)) != 0;
2806             }else{
2807                 /* Derive interlacing flag from used decoding process. */
2808                 cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
2809             }
2810             h->prev_interlaced_frame = cur->interlaced_frame;
2811
2812             if (cur->field_poc[0] != cur->field_poc[1]){
2813                 /* Derive top_field_first from field pocs. */
2814                 cur->top_field_first = cur->field_poc[0] < cur->field_poc[1];
2815             }else{
2816                 if(cur->interlaced_frame || h->sps.pic_struct_present_flag){
2817                     /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
2818                     if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
2819                       || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
2820                         cur->top_field_first = 1;
2821                     else
2822                         cur->top_field_first = 0;
2823                 }else{
2824                     /* Most likely progressive */
2825                     cur->top_field_first = 0;
2826                 }
2827             }
2828
2829         //FIXME do something with unavailable reference frames
2830
2831             /* Sort B-frames into display order */
2832
2833             if(h->sps.bitstream_restriction_flag
2834                && s->avctx->has_b_frames < h->sps.num_reorder_frames){
2835                 s->avctx->has_b_frames = h->sps.num_reorder_frames;
2836                 s->low_delay = 0;
2837             }
2838
2839             if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
2840                && !h->sps.bitstream_restriction_flag){
2841                 s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
2842                 s->low_delay= 0;
2843             }
2844
2845             pics = 0;
2846             while(h->delayed_pic[pics]) pics++;
2847
2848             assert(pics <= MAX_DELAYED_PIC_COUNT);
2849
2850             h->delayed_pic[pics++] = cur;
2851             if(cur->reference == 0)
2852                 cur->reference = DELAYED_PIC_REF;
2853
2854             out = h->delayed_pic[0];
2855             out_idx = 0;
2856             for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2857                 if(h->delayed_pic[i]->poc < out->poc){
2858                     out = h->delayed_pic[i];
2859                     out_idx = i;
2860                 }
2861             if(s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset))
2862                 h->outputed_poc= INT_MIN;
2863             out_of_order = out->poc < h->outputed_poc;
2864
2865             if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
2866                 { }
2867             else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
2868                || (s->low_delay &&
2869                 ((h->outputed_poc != INT_MIN && out->poc > h->outputed_poc + 2)
2870                  || cur->pict_type == FF_B_TYPE)))
2871             {
2872                 s->low_delay = 0;
2873                 s->avctx->has_b_frames++;
2874             }
2875
2876             if(out_of_order || pics > s->avctx->has_b_frames){
2877                 out->reference &= ~DELAYED_PIC_REF;
2878                 for(i=out_idx; h->delayed_pic[i]; i++)
2879                     h->delayed_pic[i] = h->delayed_pic[i+1];
2880             }
2881             if(!out_of_order && pics > s->avctx->has_b_frames){
2882                 *data_size = sizeof(AVFrame);
2883
2884                 if(out_idx==0 && h->delayed_pic[0] && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset)) {
2885                     h->outputed_poc = INT_MIN;
2886                 } else
2887                     h->outputed_poc = out->poc;
2888                 *pict= *(AVFrame*)out;
2889             }else{
2890                 av_log(avctx, AV_LOG_DEBUG, "no picture\n");
2891             }
2892         }
2893     }
2894
2895     assert(pict->data[0] || !*data_size);
2896     ff_print_debug_info(s, pict);
2897 //printf("out %d\n", (int)pict->data[0]);
2898
2899     return get_consumed_bytes(s, buf_index, buf_size);
2900 }
2901 #if 0
2902 static inline void fill_mb_avail(H264Context *h){
2903     MpegEncContext * const s = &h->s;
2904     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
2905
2906     if(s->mb_y){
2907         h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
2908         h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
2909         h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
2910     }else{
2911         h->mb_avail[0]=
2912         h->mb_avail[1]=
2913         h->mb_avail[2]= 0;
2914     }
2915     h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
2916     h->mb_avail[4]= 1; //FIXME move out
2917     h->mb_avail[5]= 0; //FIXME move out
2918 }
2919 #endif
2920
2921 #ifdef TEST
2922 #undef printf
2923 #undef random
2924 #define COUNT 8000
2925 #define SIZE (COUNT*40)
2926 int main(void){
2927     int i;
2928     uint8_t temp[SIZE];
2929     PutBitContext pb;
2930     GetBitContext gb;
2931 //    int int_temp[10000];
2932     DSPContext dsp;
2933     AVCodecContext avctx;
2934
2935     dsputil_init(&dsp, &avctx);
2936
2937     init_put_bits(&pb, temp, SIZE);
2938     printf("testing unsigned exp golomb\n");
2939     for(i=0; i<COUNT; i++){
2940         START_TIMER
2941         set_ue_golomb(&pb, i);
2942         STOP_TIMER("set_ue_golomb");
2943     }
2944     flush_put_bits(&pb);
2945
2946     init_get_bits(&gb, temp, 8*SIZE);
2947     for(i=0; i<COUNT; i++){
2948         int j, s;
2949
2950         s= show_bits(&gb, 24);
2951
2952         START_TIMER
2953         j= get_ue_golomb(&gb);
2954         if(j != i){
2955             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
2956 //            return -1;
2957         }
2958         STOP_TIMER("get_ue_golomb");
2959     }
2960
2961
2962     init_put_bits(&pb, temp, SIZE);
2963     printf("testing signed exp golomb\n");
2964     for(i=0; i<COUNT; i++){
2965         START_TIMER
2966         set_se_golomb(&pb, i - COUNT/2);
2967         STOP_TIMER("set_se_golomb");
2968     }
2969     flush_put_bits(&pb);
2970
2971     init_get_bits(&gb, temp, 8*SIZE);
2972     for(i=0; i<COUNT; i++){
2973         int j, s;
2974
2975         s= show_bits(&gb, 24);
2976
2977         START_TIMER
2978         j= get_se_golomb(&gb);
2979         if(j != i - COUNT/2){
2980             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
2981 //            return -1;
2982         }
2983         STOP_TIMER("get_se_golomb");
2984     }
2985
2986 #if 0
2987     printf("testing 4x4 (I)DCT\n");
2988
2989     DCTELEM block[16];
2990     uint8_t src[16], ref[16];
2991     uint64_t error= 0, max_error=0;
2992
2993     for(i=0; i<COUNT; i++){
2994         int j;
2995 //        printf("%d %d %d\n", r1, r2, (r2-r1)*16);
2996         for(j=0; j<16; j++){
2997             ref[j]= random()%255;
2998             src[j]= random()%255;
2999         }
3000
3001         h264_diff_dct_c(block, src, ref, 4);
3002
3003         //normalize
3004         for(j=0; j<16; j++){
3005 //            printf("%d ", block[j]);
3006             block[j]= block[j]*4;
3007             if(j&1) block[j]= (block[j]*4 + 2)/5;
3008             if(j&4) block[j]= (block[j]*4 + 2)/5;
3009         }
3010 //        printf("\n");
3011
3012         s->dsp.h264_idct_add(ref, block, 4);
3013 /*        for(j=0; j<16; j++){
3014             printf("%d ", ref[j]);
3015         }
3016         printf("\n");*/
3017
3018         for(j=0; j<16; j++){
3019             int diff= FFABS(src[j] - ref[j]);
3020
3021             error+= diff*diff;
3022             max_error= FFMAX(max_error, diff);
3023         }
3024     }
3025     printf("error=%f max_error=%d\n", ((float)error)/COUNT/16, (int)max_error );
3026     printf("testing quantizer\n");
3027     for(qp=0; qp<52; qp++){
3028         for(i=0; i<16; i++)
3029             src1_block[i]= src2_block[i]= random()%255;
3030
3031     }
3032     printf("Testing NAL layer\n");
3033
3034     uint8_t bitstream[COUNT];
3035     uint8_t nal[COUNT*2];
3036     H264Context h;
3037     memset(&h, 0, sizeof(H264Context));
3038
3039     for(i=0; i<COUNT; i++){
3040         int zeros= i;
3041         int nal_length;
3042         int consumed;
3043         int out_length;
3044         uint8_t *out;
3045         int j;
3046
3047         for(j=0; j<COUNT; j++){
3048             bitstream[j]= (random() % 255) + 1;
3049         }
3050
3051         for(j=0; j<zeros; j++){
3052             int pos= random() % COUNT;
3053             while(bitstream[pos] == 0){
3054                 pos++;
3055                 pos %= COUNT;
3056             }
3057             bitstream[pos]=0;
3058         }
3059
3060         START_TIMER
3061
3062         nal_length= encode_nal(&h, nal, bitstream, COUNT, COUNT*2);
3063         if(nal_length<0){
3064             printf("encoding failed\n");
3065             return -1;
3066         }
3067
3068         out= ff_h264_decode_nal(&h, nal, &out_length, &consumed, nal_length);
3069
3070         STOP_TIMER("NAL")
3071
3072         if(out_length != COUNT){
3073             printf("incorrect length %d %d\n", out_length, COUNT);
3074             return -1;
3075         }
3076
3077         if(consumed != nal_length){
3078             printf("incorrect consumed length %d %d\n", nal_length, consumed);
3079             return -1;
3080         }
3081
3082         if(memcmp(bitstream, out, COUNT)){
3083             printf("mismatch\n");
3084             return -1;
3085         }
3086     }
3087 #endif
3088
3089     printf("Testing RBSP\n");
3090
3091
3092     return 0;
3093 }
3094 #endif /* TEST */
3095
3096
3097 av_cold void ff_h264_free_context(H264Context *h)
3098 {
3099     int i;
3100
3101     free_tables(h); //FIXME cleanup init stuff perhaps
3102
3103     for(i = 0; i < MAX_SPS_COUNT; i++)
3104         av_freep(h->sps_buffers + i);
3105
3106     for(i = 0; i < MAX_PPS_COUNT; i++)
3107         av_freep(h->pps_buffers + i);
3108 }
3109
3110 av_cold int ff_h264_decode_end(AVCodecContext *avctx)
3111 {
3112     H264Context *h = avctx->priv_data;
3113     MpegEncContext *s = &h->s;
3114
3115     ff_h264_free_context(h);
3116
3117     MPV_common_end(s);
3118
3119 //    memset(h, 0, sizeof(H264Context));
3120
3121     return 0;
3122 }
3123
3124
3125 AVCodec h264_decoder = {
3126     "h264",
3127     CODEC_TYPE_VIDEO,
3128     CODEC_ID_H264,
3129     sizeof(H264Context),
3130     ff_h264_decode_init,
3131     NULL,
3132     ff_h264_decode_end,
3133     decode_frame,
3134     /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY,
3135     .flush= flush_dpb,
3136     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
3137     .pix_fmts= ff_hwaccel_pixfmt_list_420,
3138 };
3139
3140 #if CONFIG_H264_VDPAU_DECODER
3141 AVCodec h264_vdpau_decoder = {
3142     "h264_vdpau",
3143     CODEC_TYPE_VIDEO,
3144     CODEC_ID_H264,
3145     sizeof(H264Context),
3146     ff_h264_decode_init,
3147     NULL,
3148     ff_h264_decode_end,
3149     decode_frame,
3150     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
3151     .flush= flush_dpb,
3152     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
3153     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
3154 };
3155 #endif