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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     int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
  56
  57     AV_COPY32(mode, h->intra4x4_pred_mode_cache + 4 + 8*4);
  58     mode[4]= h->intra4x4_pred_mode_cache[7+8*3];
  59     mode[5]= h->intra4x4_pred_mode_cache[7+8*2];
  60     mode[6]= h->intra4x4_pred_mode_cache[7+8*1];
  61 }
  62
  63 /**
  64  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
  65  */
  66 int ff_h264_check_intra4x4_pred_mode(H264Context *h){
  67     MpegEncContext * const s = &h->s;
  68     static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
  69     static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
  70     int i;
  71
  72     if(!(h->top_samples_available&0x8000)){
  73         for(i=0; i<4; i++){
  74             int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
  75             if(status<0){
  76                 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);
  77                 return -1;
  78             } else if(status){
  79                 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
  80             }
  81         }
  82     }
  83
  84     if((h->left_samples_available&0x8888)!=0x8888){
  85         static const int mask[4]={0x8000,0x2000,0x80,0x20};
  86         for(i=0; i<4; i++){
  87             if(!(h->left_samples_available&mask[i])){
  88                 int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
  89                 if(status<0){
  90                     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);
  91                     return -1;
  92                 } else if(status){
  93                     h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
  94                 }
  95             }
  96         }
  97     }
  98
  99     return 0;
 100 } //FIXME cleanup like ff_h264_check_intra_pred_mode
 101
 102 /**
 103  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 104  */
 105 int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
 106     MpegEncContext * const s = &h->s;
 107     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
 108     static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
 109
 110     if(mode > 6U) {
 111         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);
 112         return -1;
 113     }
 114
 115     if(!(h->top_samples_available&0x8000)){
 116         mode= top[ mode ];
 117         if(mode<0){
 118             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);
 119             return -1;
 120         }
 121     }
 122
 123     if((h->left_samples_available&0x8080) != 0x8080){
 124         mode= left[ mode ];
 125         if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
 126             mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
 127         }
 128         if(mode<0){
 129             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);
 130             return -1;
 131         }
 132     }
 133
 134     return mode;
 135 }
 136
 137 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
 138     int i, si, di;
 139     uint8_t *dst;
 140     int bufidx;
 141
 142 //    src[0]&0x80;                //forbidden bit
 143     h->nal_ref_idc= src[0]>>5;
 144     h->nal_unit_type= src[0]&0x1F;
 145
 146     src++; length--;
 147 #if 0
 148     for(i=0; i<length; i++)
 149         printf("%2X ", src[i]);
 150 #endif
 151
 152 #if HAVE_FAST_UNALIGNED
 153 # if HAVE_FAST_64BIT
 154 #   define RS 7
 155     for(i=0; i+1<length; i+=9){
 156         if(!((~AV_RN64A(src+i) & (AV_RN64A(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
 157 # else
 158 #   define RS 3
 159     for(i=0; i+1<length; i+=5){
 160         if(!((~AV_RN32A(src+i) & (AV_RN32A(src+i) - 0x01000101U)) & 0x80008080U))
 161 # endif
 162             continue;
 163         if(i>0 && !src[i]) i--;
 164         while(src[i]) i++;
 165 #else
 166 #   define RS 0
 167     for(i=0; i+1<length; i+=2){
 168         if(src[i]) continue;
 169         if(i>0 && src[i-1]==0) i--;
 170 #endif
 171         if(i+2<length && src[i+1]==0 && src[i+2]<=3){
 172             if(src[i+2]!=3){
 173                 /* startcode, so we must be past the end */
 174                 length=i;
 175             }
 176             break;
 177         }
 178         i-= RS;
 179     }
 180
 181     if(i>=length-1){ //no escaped 0
 182         *dst_length= length;
 183         *consumed= length+1; //+1 for the header
 184         return src;
 185     }
 186
 187     bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
 188     av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
 189     dst= h->rbsp_buffer[bufidx];
 190
 191     if (dst == NULL){
 192         return NULL;
 193     }
 194
 195 //printf("decoding esc\n");
 196     memcpy(dst, src, i);
 197     si=di=i;
 198     while(si+2<length){
 199         //remove escapes (very rare 1:2^22)
 200         if(src[si+2]>3){
 201             dst[di++]= src[si++];
 202             dst[di++]= src[si++];
 203         }else if(src[si]==0 && src[si+1]==0){
 204             if(src[si+2]==3){ //escape
 205                 dst[di++]= 0;
 206                 dst[di++]= 0;
 207                 si+=3;
 208                 continue;
 209             }else //next start code
 210                 goto nsc;
 211         }
 212
 213         dst[di++]= src[si++];
 214     }
 215     while(si<length)
 216         dst[di++]= src[si++];
 217 nsc:
 218
 219     memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
 220
 221     *dst_length= di;
 222     *consumed= si + 1;//+1 for the header
 223 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
 224     return dst;
 225 }
 226
 227 int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
 228     int v= *src;
 229     int r;
 230
 231     tprintf(h->s.avctx, "rbsp trailing %X\n", v);
 232
 233     for(r=1; r<9; r++){
 234         if(v&1) return r;
 235         v>>=1;
 236     }
 237     return 0;
 238 }
 239
 240 /**
 241  * IDCT transforms the 16 dc values and dequantizes them.
 242  * @param qp quantization parameter
 243  */
 244 static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
 245 #define stride 16
 246     int i;
 247     int temp[16]; //FIXME check if this is a good idea
 248     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
 249     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
 250
 251 //memset(block, 64, 2*256);
 252 //return;
 253     for(i=0; i<4; i++){
 254         const int offset= y_offset[i];
 255         const int z0= block[offset+stride*0] + block[offset+stride*4];
 256         const int z1= block[offset+stride*0] - block[offset+stride*4];
 257         const int z2= block[offset+stride*1] - block[offset+stride*5];
 258         const int z3= block[offset+stride*1] + block[offset+stride*5];
 259
 260         temp[4*i+0]= z0+z3;
 261         temp[4*i+1]= z1+z2;
 262         temp[4*i+2]= z1-z2;
 263         temp[4*i+3]= z0-z3;
 264     }
 265
 266     for(i=0; i<4; i++){
 267         const int offset= x_offset[i];
 268         const int z0= temp[4*0+i] + temp[4*2+i];
 269         const int z1= temp[4*0+i] - temp[4*2+i];
 270         const int z2= temp[4*1+i] - temp[4*3+i];
 271         const int z3= temp[4*1+i] + temp[4*3+i];
 272
 273         block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
 274         block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
 275         block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
 276         block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
 277     }
 278 }
 279
 280 #if 0
 281 /**
 282  * DCT transforms the 16 dc values.
 283  * @param qp quantization parameter ??? FIXME
 284  */
 285 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
 286 //    const int qmul= dequant_coeff[qp][0];
 287     int i;
 288     int temp[16]; //FIXME check if this is a good idea
 289     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
 290     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
 291
 292     for(i=0; i<4; i++){
 293         const int offset= y_offset[i];
 294         const int z0= block[offset+stride*0] + block[offset+stride*4];
 295         const int z1= block[offset+stride*0] - block[offset+stride*4];
 296         const int z2= block[offset+stride*1] - block[offset+stride*5];
 297         const int z3= block[offset+stride*1] + block[offset+stride*5];
 298
 299         temp[4*i+0]= z0+z3;
 300         temp[4*i+1]= z1+z2;
 301         temp[4*i+2]= z1-z2;
 302         temp[4*i+3]= z0-z3;
 303     }
 304
 305     for(i=0; i<4; i++){
 306         const int offset= x_offset[i];
 307         const int z0= temp[4*0+i] + temp[4*2+i];
 308         const int z1= temp[4*0+i] - temp[4*2+i];
 309         const int z2= temp[4*1+i] - temp[4*3+i];
 310         const int z3= temp[4*1+i] + temp[4*3+i];
 311
 312         block[stride*0 +offset]= (z0 + z3)>>1;
 313         block[stride*2 +offset]= (z1 + z2)>>1;
 314         block[stride*8 +offset]= (z1 - z2)>>1;
 315         block[stride*10+offset]= (z0 - z3)>>1;
 316     }
 317 }
 318 #endif
 319
 320 #undef xStride
 321 #undef stride
 322
 323 static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
 324     const int stride= 16*2;
 325     const int xStride= 16;
 326     int a,b,c,d,e;
 327
 328     a= block[stride*0 + xStride*0];
 329     b= block[stride*0 + xStride*1];
 330     c= block[stride*1 + xStride*0];
 331     d= block[stride*1 + xStride*1];
 332
 333     e= a-b;
 334     a= a+b;
 335     b= c-d;
 336     c= c+d;
 337
 338     block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
 339     block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
 340     block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
 341     block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
 342 }
 343
 344 #if 0
 345 static void chroma_dc_dct_c(DCTELEM *block){
 346     const int stride= 16*2;
 347     const int xStride= 16;
 348     int a,b,c,d,e;
 349
 350     a= block[stride*0 + xStride*0];
 351     b= block[stride*0 + xStride*1];
 352     c= block[stride*1 + xStride*0];
 353     d= block[stride*1 + xStride*1];
 354
 355     e= a-b;
 356     a= a+b;
 357     b= c-d;
 358     c= c+d;
 359
 360     block[stride*0 + xStride*0]= (a+c);
 361     block[stride*0 + xStride*1]= (e+b);
 362     block[stride*1 + xStride*0]= (a-c);
 363     block[stride*1 + xStride*1]= (e-b);
 364 }
 365 #endif
 366
 367 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
 368                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 369                            int src_x_offset, int src_y_offset,
 370                            qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
 371     MpegEncContext * const s = &h->s;
 372     const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
 373     int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
 374     const int luma_xy= (mx&3) + ((my&3)<<2);
 375     uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
 376     uint8_t * src_cb, * src_cr;
 377     int extra_width= h->emu_edge_width;
 378     int extra_height= h->emu_edge_height;
 379     int emu=0;
 380     const int full_mx= mx>>2;
 381     const int full_my= my>>2;
 382     const int pic_width  = 16*s->mb_width;
 383     const int pic_height = 16*s->mb_height >> MB_FIELD;
 384
 385     if(mx&7) extra_width -= 3;
 386     if(my&7) extra_height -= 3;
 387
 388     if(   full_mx < 0-extra_width
 389        || full_my < 0-extra_height
 390        || full_mx + 16/*FIXME*/ > pic_width + extra_width
 391        || full_my + 16/*FIXME*/ > pic_height + extra_height){
 392         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);
 393             src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
 394         emu=1;
 395     }
 396
 397     qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
 398     if(!square){
 399         qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
 400     }
 401
 402     if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
 403
 404     if(MB_FIELD){
 405         // chroma offset when predicting from a field of opposite parity
 406         my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
 407         emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
 408     }
 409     src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
 410     src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
 411
 412     if(emu){
 413         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);
 414             src_cb= s->edge_emu_buffer;
 415     }
 416     chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
 417
 418     if(emu){
 419         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);
 420             src_cr= s->edge_emu_buffer;
 421     }
 422     chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
 423 }
 424
 425 static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
 426                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 427                            int x_offset, int y_offset,
 428                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 429                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 430                            int list0, int list1){
 431     MpegEncContext * const s = &h->s;
 432     qpel_mc_func *qpix_op=  qpix_put;
 433     h264_chroma_mc_func chroma_op= chroma_put;
 434
 435     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
 436     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
 437     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
 438     x_offset += 8*s->mb_x;
 439     y_offset += 8*(s->mb_y >> MB_FIELD);
 440
 441     if(list0){
 442         Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
 443         mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
 444                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 445                            qpix_op, chroma_op);
 446
 447         qpix_op=  qpix_avg;
 448         chroma_op= chroma_avg;
 449     }
 450
 451     if(list1){
 452         Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
 453         mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
 454                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 455                            qpix_op, chroma_op);
 456     }
 457 }
 458
 459 static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
 460                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 461                            int x_offset, int y_offset,
 462                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 463                            h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
 464                            h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
 465                            int list0, int list1){
 466     MpegEncContext * const s = &h->s;
 467
 468     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
 469     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
 470     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
 471     x_offset += 8*s->mb_x;
 472     y_offset += 8*(s->mb_y >> MB_FIELD);
 473
 474     if(list0 && list1){
 475         /* don't optimize for luma-only case, since B-frames usually
 476          * use implicit weights => chroma too. */
 477         uint8_t *tmp_cb = s->obmc_scratchpad;
 478         uint8_t *tmp_cr = s->obmc_scratchpad + 8;
 479         uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
 480         int refn0 = h->ref_cache[0][ scan8[n] ];
 481         int refn1 = h->ref_cache[1][ scan8[n] ];
 482
 483         mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
 484                     dest_y, dest_cb, dest_cr,
 485                     x_offset, y_offset, qpix_put, chroma_put);
 486         mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
 487                     tmp_y, tmp_cb, tmp_cr,
 488                     x_offset, y_offset, qpix_put, chroma_put);
 489
 490         if(h->use_weight == 2){
 491             int weight0 = h->implicit_weight[refn0][refn1];
 492             int weight1 = 64 - weight0;
 493             luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
 494             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
 495             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
 496         }else{
 497             luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
 498                             h->luma_weight[refn0][0][0] , h->luma_weight[refn1][1][0],
 499                             h->luma_weight[refn0][0][1] + h->luma_weight[refn1][1][1]);
 500             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 501                             h->chroma_weight[refn0][0][0][0] , h->chroma_weight[refn1][1][0][0],
 502                             h->chroma_weight[refn0][0][0][1] + h->chroma_weight[refn1][1][0][1]);
 503             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 504                             h->chroma_weight[refn0][0][1][0] , h->chroma_weight[refn1][1][1][0],
 505                             h->chroma_weight[refn0][0][1][1] + h->chroma_weight[refn1][1][1][1]);
 506         }
 507     }else{
 508         int list = list1 ? 1 : 0;
 509         int refn = h->ref_cache[list][ scan8[n] ];
 510         Picture *ref= &h->ref_list[list][refn];
 511         mc_dir_part(h, ref, n, square, chroma_height, delta, list,
 512                     dest_y, dest_cb, dest_cr, x_offset, y_offset,
 513                     qpix_put, chroma_put);
 514
 515         luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
 516                        h->luma_weight[refn][list][0], h->luma_weight[refn][list][1]);
 517         if(h->use_weight_chroma){
 518             chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 519                              h->chroma_weight[refn][list][0][0], h->chroma_weight[refn][list][0][1]);
 520             chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 521                              h->chroma_weight[refn][list][1][0], h->chroma_weight[refn][list][1][1]);
 522         }
 523     }
 524 }
 525
 526 static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
 527                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 528                            int x_offset, int y_offset,
 529                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 530                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 531                            h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 532                            int list0, int list1){
 533     if((h->use_weight==2 && list0 && list1
 534         && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
 535        || h->use_weight==1)
 536         mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
 537                          x_offset, y_offset, qpix_put, chroma_put,
 538                          weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
 539     else
 540         mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
 541                     x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
 542 }
 543
 544 static inline void prefetch_motion(H264Context *h, int list){
 545     /* fetch pixels for estimated mv 4 macroblocks ahead
 546      * optimized for 64byte cache lines */
 547     MpegEncContext * const s = &h->s;
 548     const int refn = h->ref_cache[list][scan8[0]];
 549     if(refn >= 0){
 550         const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
 551         const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
 552         uint8_t **src= h->ref_list[list][refn].data;
 553         int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
 554         s->dsp.prefetch(src[0]+off, s->linesize, 4);
 555         off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
 556         s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
 557     }
 558 }
 559
 560 static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 561                       qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
 562                       qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
 563                       h264_weight_func *weight_op, h264_biweight_func *weight_avg){
 564     MpegEncContext * const s = &h->s;
 565     const int mb_xy= h->mb_xy;
 566     const int mb_type= s->current_picture.mb_type[mb_xy];
 567
 568     assert(IS_INTER(mb_type));
 569
 570     prefetch_motion(h, 0);
 571
 572     if(IS_16X16(mb_type)){
 573         mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
 574                 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
 575                 weight_op, weight_avg,
 576                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
 577     }else if(IS_16X8(mb_type)){
 578         mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
 579                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 580                 &weight_op[1], &weight_avg[1],
 581                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
 582         mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
 583                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 584                 &weight_op[1], &weight_avg[1],
 585                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
 586     }else if(IS_8X16(mb_type)){
 587         mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
 588                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 589                 &weight_op[2], &weight_avg[2],
 590                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
 591         mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
 592                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 593                 &weight_op[2], &weight_avg[2],
 594                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
 595     }else{
 596         int i;
 597
 598         assert(IS_8X8(mb_type));
 599
 600         for(i=0; i<4; i++){
 601             const int sub_mb_type= h->sub_mb_type[i];
 602             const int n= 4*i;
 603             int x_offset= (i&1)<<2;
 604             int y_offset= (i&2)<<1;
 605
 606             if(IS_SUB_8X8(sub_mb_type)){
 607                 mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 608                     qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 609                     &weight_op[3], &weight_avg[3],
 610                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 611             }else if(IS_SUB_8X4(sub_mb_type)){
 612                 mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 613                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 614                     &weight_op[4], &weight_avg[4],
 615                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 616                 mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
 617                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 618                     &weight_op[4], &weight_avg[4],
 619                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 620             }else if(IS_SUB_4X8(sub_mb_type)){
 621                 mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 622                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 623                     &weight_op[5], &weight_avg[5],
 624                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 625                 mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
 626                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 627                     &weight_op[5], &weight_avg[5],
 628                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 629             }else{
 630                 int j;
 631                 assert(IS_SUB_4X4(sub_mb_type));
 632                 for(j=0; j<4; j++){
 633                     int sub_x_offset= x_offset + 2*(j&1);
 634                     int sub_y_offset= y_offset +   (j&2);
 635                     mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
 636                         qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 637                         &weight_op[6], &weight_avg[6],
 638                         IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
 639                 }
 640             }
 641         }
 642     }
 643
 644     prefetch_motion(h, 1);
 645 }
 646
 647
 648 static void free_tables(H264Context *h){
 649     int i;
 650     H264Context *hx;
 651     av_freep(&h->intra4x4_pred_mode);
 652     av_freep(&h->chroma_pred_mode_table);
 653     av_freep(&h->cbp_table);
 654     av_freep(&h->mvd_table[0]);
 655     av_freep(&h->mvd_table[1]);
 656     av_freep(&h->direct_table);
 657     av_freep(&h->non_zero_count);
 658     av_freep(&h->slice_table_base);
 659     h->slice_table= NULL;
 660     av_freep(&h->list_counts);
 661
 662     av_freep(&h->mb2b_xy);
 663     av_freep(&h->mb2br_xy);
 664
 665     for(i = 0; i < MAX_THREADS; i++) {
 666         hx = h->thread_context[i];
 667         if(!hx) continue;
 668         av_freep(&hx->top_borders[1]);
 669         av_freep(&hx->top_borders[0]);
 670         av_freep(&hx->s.obmc_scratchpad);
 671         av_freep(&hx->rbsp_buffer[1]);
 672         av_freep(&hx->rbsp_buffer[0]);
 673         hx->rbsp_buffer_size[0] = 0;
 674         hx->rbsp_buffer_size[1] = 0;
 675         if (i) av_freep(&h->thread_context[i]);
 676     }
 677 }
 678
 679 static void init_dequant8_coeff_table(H264Context *h){
 680     int i,q,x;
 681     const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
 682     h->dequant8_coeff[0] = h->dequant8_buffer[0];
 683     h->dequant8_coeff[1] = h->dequant8_buffer[1];
 684
 685     for(i=0; i<2; i++ ){
 686         if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
 687             h->dequant8_coeff[1] = h->dequant8_buffer[0];
 688             break;
 689         }
 690
 691         for(q=0; q<52; q++){
 692             int shift = div6[q];
 693             int idx = rem6[q];
 694             for(x=0; x<64; x++)
 695                 h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
 696                     ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
 697                     h->pps.scaling_matrix8[i][x]) << shift;
 698         }
 699     }
 700 }
 701
 702 static void init_dequant4_coeff_table(H264Context *h){
 703     int i,j,q,x;
 704     const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
 705     for(i=0; i<6; i++ ){
 706         h->dequant4_coeff[i] = h->dequant4_buffer[i];
 707         for(j=0; j<i; j++){
 708             if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
 709                 h->dequant4_coeff[i] = h->dequant4_buffer[j];
 710                 break;
 711             }
 712         }
 713         if(j<i)
 714             continue;
 715
 716         for(q=0; q<52; q++){
 717             int shift = div6[q] + 2;
 718             int idx = rem6[q];
 719             for(x=0; x<16; x++)
 720                 h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
 721                     ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
 722                     h->pps.scaling_matrix4[i][x]) << shift;
 723         }
 724     }
 725 }
 726
 727 static void init_dequant_tables(H264Context *h){
 728     int i,x;
 729     init_dequant4_coeff_table(h);
 730     if(h->pps.transform_8x8_mode)
 731         init_dequant8_coeff_table(h);
 732     if(h->sps.transform_bypass){
 733         for(i=0; i<6; i++)
 734             for(x=0; x<16; x++)
 735                 h->dequant4_coeff[i][0][x] = 1<<6;
 736         if(h->pps.transform_8x8_mode)
 737             for(i=0; i<2; i++)
 738                 for(x=0; x<64; x++)
 739                     h->dequant8_coeff[i][0][x] = 1<<6;
 740     }
 741 }
 742
 743
 744 int ff_h264_alloc_tables(H264Context *h){
 745     MpegEncContext * const s = &h->s;
 746     const int big_mb_num= s->mb_stride * (s->mb_height+1);
 747     const int row_mb_num= 2*s->mb_stride*s->avctx->thread_count;
 748     int x,y;
 749
 750     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, row_mb_num * 8  * sizeof(uint8_t), fail)
 751
 752     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 32 * sizeof(uint8_t), fail)
 753     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
 754     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
 755
 756     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
 757     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*row_mb_num * sizeof(uint8_t), fail);
 758     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*row_mb_num * sizeof(uint8_t), fail);
 759     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 4*big_mb_num * sizeof(uint8_t) , fail);
 760     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
 761
 762     memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
 763     h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
 764
 765     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
 766     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
 767     for(y=0; y<s->mb_height; y++){
 768         for(x=0; x<s->mb_width; x++){
 769             const int mb_xy= x + y*s->mb_stride;
 770             const int b_xy = 4*x + 4*y*h->b_stride;
 771
 772             h->mb2b_xy [mb_xy]= b_xy;
 773             h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
 774         }
 775     }
 776
 777     s->obmc_scratchpad = NULL;
 778
 779     if(!h->dequant4_coeff[0])
 780         init_dequant_tables(h);
 781
 782     return 0;
 783 fail:
 784     free_tables(h);
 785     return -1;
 786 }
 787
 788 /**
 789  * Mimic alloc_tables(), but for every context thread.
 790  */
 791 static void clone_tables(H264Context *dst, H264Context *src, int i){
 792     MpegEncContext * const s = &src->s;
 793     dst->intra4x4_pred_mode       = src->intra4x4_pred_mode + i*8*2*s->mb_stride;
 794     dst->non_zero_count           = src->non_zero_count;
 795     dst->slice_table              = src->slice_table;
 796     dst->cbp_table                = src->cbp_table;
 797     dst->mb2b_xy                  = src->mb2b_xy;
 798     dst->mb2br_xy                 = src->mb2br_xy;
 799     dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
 800     dst->mvd_table[0]             = src->mvd_table[0] + i*8*2*s->mb_stride;
 801     dst->mvd_table[1]             = src->mvd_table[1] + i*8*2*s->mb_stride;
 802     dst->direct_table             = src->direct_table;
 803     dst->list_counts              = src->list_counts;
 804
 805     dst->s.obmc_scratchpad = NULL;
 806     ff_h264_pred_init(&dst->hpc, src->s.codec_id);
 807 }
 808
 809 /**
 810  * Init context
 811  * Allocate buffers which are not shared amongst multiple threads.
 812  */
 813 static int context_init(H264Context *h){
 814     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
 815     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
 816
 817     h->ref_cache[0][scan8[5 ]+1] = h->ref_cache[0][scan8[7 ]+1] = h->ref_cache[0][scan8[13]+1] =
 818     h->ref_cache[1][scan8[5 ]+1] = h->ref_cache[1][scan8[7 ]+1] = h->ref_cache[1][scan8[13]+1] = PART_NOT_AVAILABLE;
 819
 820     return 0;
 821 fail:
 822     return -1; // free_tables will clean up for us
 823 }
 824
 825 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
 826
 827 static av_cold void common_init(H264Context *h){
 828     MpegEncContext * const s = &h->s;
 829
 830     s->width = s->avctx->width;
 831     s->height = s->avctx->height;
 832     s->codec_id= s->avctx->codec->id;
 833
 834     ff_h264_pred_init(&h->hpc, s->codec_id);
 835
 836     h->dequant_coeff_pps= -1;
 837     s->unrestricted_mv=1;
 838     s->decode=1; //FIXME
 839
 840     dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
 841
 842     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
 843     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
 844 }
 845
 846 av_cold int ff_h264_decode_init(AVCodecContext *avctx){
 847     H264Context *h= avctx->priv_data;
 848     MpegEncContext * const s = &h->s;
 849
 850     MPV_decode_defaults(s);
 851
 852     s->avctx = avctx;
 853     common_init(h);
 854
 855     s->out_format = FMT_H264;
 856     s->workaround_bugs= avctx->workaround_bugs;
 857
 858     // set defaults
 859 //    s->decode_mb= ff_h263_decode_mb;
 860     s->quarter_sample = 1;
 861     if(!avctx->has_b_frames)
 862     s->low_delay= 1;
 863
 864     avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
 865
 866     ff_h264_decode_init_vlc();
 867
 868     h->thread_context[0] = h;
 869     h->outputed_poc = INT_MIN;
 870     h->prev_poc_msb= 1<<16;
 871     h->x264_build = -1;
 872     ff_h264_reset_sei(h);
 873     if(avctx->codec_id == CODEC_ID_H264){
 874         if(avctx->ticks_per_frame == 1){
 875             s->avctx->time_base.den *=2;
 876         }
 877         avctx->ticks_per_frame = 2;
 878     }
 879
 880     if(avctx->extradata_size > 0 && avctx->extradata && *(char *)avctx->extradata == 1){
 881         int i, cnt, nalsize;
 882         unsigned char *p = avctx->extradata;
 883
 884         h->is_avc = 1;
 885
 886         if(avctx->extradata_size < 7) {
 887             av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
 888             return -1;
 889         }
 890         /* sps and pps in the avcC always have length coded with 2 bytes,
 891            so put a fake nal_length_size = 2 while parsing them */
 892         h->nal_length_size = 2;
 893         // Decode sps from avcC
 894         cnt = *(p+5) & 0x1f; // Number of sps
 895         p += 6;
 896         for (i = 0; i < cnt; i++) {
 897             nalsize = AV_RB16(p) + 2;
 898             if(decode_nal_units(h, p, nalsize) < 0) {
 899                 av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
 900                 return -1;
 901             }
 902             p += nalsize;
 903         }
 904         // Decode pps from avcC
 905         cnt = *(p++); // Number of pps
 906         for (i = 0; i < cnt; i++) {
 907             nalsize = AV_RB16(p) + 2;
 908             if(decode_nal_units(h, p, nalsize)  != nalsize) {
 909                 av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
 910                 return -1;
 911             }
 912             p += nalsize;
 913         }
 914         // Now store right nal length size, that will be use to parse all other nals
 915         h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
 916     } else {
 917         h->is_avc = 0;
 918         if(decode_nal_units(h, s->avctx->extradata, s->avctx->extradata_size) < 0)
 919             return -1;
 920     }
 921     if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
 922         s->avctx->has_b_frames = h->sps.num_reorder_frames;
 923         s->low_delay = 0;
 924     }
 925
 926     return 0;
 927 }
 928
 929 int ff_h264_frame_start(H264Context *h){
 930     MpegEncContext * const s = &h->s;
 931     int i;
 932
 933     if(MPV_frame_start(s, s->avctx) < 0)
 934         return -1;
 935     ff_er_frame_start(s);
 936     /*
 937      * MPV_frame_start uses pict_type to derive key_frame.
 938      * This is incorrect for H.264; IDR markings must be used.
 939      * Zero here; IDR markings per slice in frame or fields are ORed in later.
 940      * See decode_nal_units().
 941      */
 942     s->current_picture_ptr->key_frame= 0;
 943     s->current_picture_ptr->mmco_reset= 0;
 944
 945     assert(s->linesize && s->uvlinesize);
 946
 947     for(i=0; i<16; i++){
 948         h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
 949         h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
 950     }
 951     for(i=0; i<4; i++){
 952         h->block_offset[16+i]=
 953         h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
 954         h->block_offset[24+16+i]=
 955         h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
 956     }
 957
 958     /* can't be in alloc_tables because linesize isn't known there.
 959      * FIXME: redo bipred weight to not require extra buffer? */
 960     for(i = 0; i < s->avctx->thread_count; i++)
 961         if(!h->thread_context[i]->s.obmc_scratchpad)
 962             h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
 963
 964     /* some macroblocks will be accessed before they're available */
 965     if(FRAME_MBAFF || s->avctx->thread_count > 1)
 966         memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
 967
 968 //    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
 969
 970     // We mark the current picture as non-reference after allocating it, so
 971     // that if we break out due to an error it can be released automatically
 972     // in the next MPV_frame_start().
 973     // SVQ3 as well as most other codecs have only last/next/current and thus
 974     // get released even with set reference, besides SVQ3 and others do not
 975     // mark frames as reference later "naturally".
 976     if(s->codec_id != CODEC_ID_SVQ3)
 977         s->current_picture_ptr->reference= 0;
 978
 979     s->current_picture_ptr->field_poc[0]=
 980     s->current_picture_ptr->field_poc[1]= INT_MAX;
 981     assert(s->current_picture_ptr->long_ref==0);
 982
 983     return 0;
 984 }
 985
 986 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){
 987     MpegEncContext * const s = &h->s;
 988     uint8_t *top_border;
 989     int top_idx = 1;
 990
 991     src_y  -=   linesize;
 992     src_cb -= uvlinesize;
 993     src_cr -= uvlinesize;
 994
 995     if(!simple && FRAME_MBAFF){
 996         if(s->mb_y&1){
 997             if(!MB_MBAFF){
 998                 top_border = h->top_borders[0][s->mb_x];
 999                 AV_COPY128(top_border, src_y + 15*linesize);
1000                 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1001                     AV_COPY64(top_border+16, src_cb+7*uvlinesize);
1002                     AV_COPY64(top_border+24, src_cr+7*uvlinesize);
1003                 }
1004             }
1005         }else if(MB_MBAFF){
1006             top_idx = 0;
1007         }else
1008             return;
1009     }
1010
1011     top_border = h->top_borders[top_idx][s->mb_x];
1012     // There are two lines saved, the line above the the top macroblock of a pair,
1013     // and the line above the bottom macroblock
1014     AV_COPY128(top_border, src_y + 16*linesize);
1015
1016     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1017         AV_COPY64(top_border+16, src_cb+8*uvlinesize);
1018         AV_COPY64(top_border+24, src_cr+8*uvlinesize);
1019     }
1020 }
1021
1022 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){
1023     MpegEncContext * const s = &h->s;
1024     int deblock_left;
1025     int deblock_top;
1026     int top_idx = 1;
1027     uint8_t *top_border_m1;
1028     uint8_t *top_border;
1029
1030     if(!simple && FRAME_MBAFF){
1031         if(s->mb_y&1){
1032             if(!MB_MBAFF)
1033                 return;
1034         }else{
1035             top_idx = MB_MBAFF ? 0 : 1;
1036         }
1037     }
1038
1039     if(h->deblocking_filter == 2) {
1040         deblock_left = h->left_type[0];
1041         deblock_top  = h->top_type;
1042     } else {
1043         deblock_left = (s->mb_x > 0);
1044         deblock_top =  (s->mb_y > !!MB_FIELD);
1045     }
1046
1047     src_y  -=   linesize + 1;
1048     src_cb -= uvlinesize + 1;
1049     src_cr -= uvlinesize + 1;
1050
1051     top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1052     top_border    = h->top_borders[top_idx][s->mb_x];
1053
1054 #define XCHG(a,b,xchg)\
1055 if (xchg) AV_SWAP64(b,a);\
1056 else      AV_COPY64(b,a);
1057
1058     if(deblock_top){
1059         if(deblock_left){
1060             XCHG(top_border_m1+8, src_y -7, 1);
1061         }
1062         XCHG(top_border+0, src_y +1, xchg);
1063         XCHG(top_border+8, src_y +9, 1);
1064         if(s->mb_x+1 < s->mb_width){
1065             XCHG(h->top_borders[top_idx][s->mb_x+1], src_y +17, 1);
1066         }
1067     }
1068
1069     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1070         if(deblock_top){
1071             if(deblock_left){
1072                 XCHG(top_border_m1+16, src_cb -7, 1);
1073                 XCHG(top_border_m1+24, src_cr -7, 1);
1074             }
1075             XCHG(top_border+16, src_cb+1, 1);
1076             XCHG(top_border+24, src_cr+1, 1);
1077         }
1078     }
1079 }
1080
1081 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
1082     MpegEncContext * const s = &h->s;
1083     const int mb_x= s->mb_x;
1084     const int mb_y= s->mb_y;
1085     const int mb_xy= h->mb_xy;
1086     const int mb_type= s->current_picture.mb_type[mb_xy];
1087     uint8_t  *dest_y, *dest_cb, *dest_cr;
1088     int linesize, uvlinesize /*dct_offset*/;
1089     int i;
1090     int *block_offset = &h->block_offset[0];
1091     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1092     /* is_h264 should always be true if SVQ3 is disabled. */
1093     const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1094     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1095     void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1096
1097     dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
1098     dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
1099     dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
1100
1101     s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
1102     s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
1103
1104     h->list_counts[mb_xy]= h->list_count;
1105
1106     if (!simple && MB_FIELD) {
1107         linesize   = h->mb_linesize   = s->linesize * 2;
1108         uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1109         block_offset = &h->block_offset[24];
1110         if(mb_y&1){ //FIXME move out of this function?
1111             dest_y -= s->linesize*15;
1112             dest_cb-= s->uvlinesize*7;
1113             dest_cr-= s->uvlinesize*7;
1114         }
1115         if(FRAME_MBAFF) {
1116             int list;
1117             for(list=0; list<h->list_count; list++){
1118                 if(!USES_LIST(mb_type, list))
1119                     continue;
1120                 if(IS_16X16(mb_type)){
1121                     int8_t *ref = &h->ref_cache[list][scan8[0]];
1122                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1123                 }else{
1124                     for(i=0; i<16; i+=4){
1125                         int ref = h->ref_cache[list][scan8[i]];
1126                         if(ref >= 0)
1127                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1128                     }
1129                 }
1130             }
1131         }
1132     } else {
1133         linesize   = h->mb_linesize   = s->linesize;
1134         uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1135 //        dct_offset = s->linesize * 16;
1136     }
1137
1138     if (!simple && IS_INTRA_PCM(mb_type)) {
1139         for (i=0; i<16; i++) {
1140             memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1141         }
1142         for (i=0; i<8; i++) {
1143             memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
1144             memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
1145         }
1146     } else {
1147         if(IS_INTRA(mb_type)){
1148             if(h->deblocking_filter)
1149                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
1150
1151             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1152                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1153                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1154             }
1155
1156             if(IS_INTRA4x4(mb_type)){
1157                 if(simple || !s->encoding){
1158                     if(IS_8x8DCT(mb_type)){
1159                         if(transform_bypass){
1160                             idct_dc_add =
1161                             idct_add    = s->dsp.add_pixels8;
1162                         }else{
1163                             idct_dc_add = s->dsp.h264_idct8_dc_add;
1164                             idct_add    = s->dsp.h264_idct8_add;
1165                         }
1166                         for(i=0; i<16; i+=4){
1167                             uint8_t * const ptr= dest_y + block_offset[i];
1168                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1169                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1170                                 h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
1171                             }else{
1172                                 const int nnz = h->non_zero_count_cache[ scan8[i] ];
1173                                 h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1174                                                             (h->topright_samples_available<<i)&0x4000, linesize);
1175                                 if(nnz){
1176                                     if(nnz == 1 && h->mb[i*16])
1177                                         idct_dc_add(ptr, h->mb + i*16, linesize);
1178                                     else
1179                                         idct_add   (ptr, h->mb + i*16, linesize);
1180                                 }
1181                             }
1182                         }
1183                     }else{
1184                         if(transform_bypass){
1185                             idct_dc_add =
1186                             idct_add    = s->dsp.add_pixels4;
1187                         }else{
1188                             idct_dc_add = s->dsp.h264_idct_dc_add;
1189                             idct_add    = s->dsp.h264_idct_add;
1190                         }
1191                         for(i=0; i<16; i++){
1192                             uint8_t * const ptr= dest_y + block_offset[i];
1193                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1194
1195                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1196                                 h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
1197                             }else{
1198                                 uint8_t *topright;
1199                                 int nnz, tr;
1200                                 if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1201                                     const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1202                                     assert(mb_y || linesize <= block_offset[i]);
1203                                     if(!topright_avail){
1204                                         tr= ptr[3 - linesize]*0x01010101;
1205                                         topright= (uint8_t*) &tr;
1206                                     }else
1207                                         topright= ptr + 4 - linesize;
1208                                 }else
1209                                     topright= NULL;
1210
1211                                 h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1212                                 nnz = h->non_zero_count_cache[ scan8[i] ];
1213                                 if(nnz){
1214                                     if(is_h264){
1215                                         if(nnz == 1 && h->mb[i*16])
1216                                             idct_dc_add(ptr, h->mb + i*16, linesize);
1217                                         else
1218                                             idct_add   (ptr, h->mb + i*16, linesize);
1219                                     }else
1220                                         ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
1221                                 }
1222                             }
1223                         }
1224                     }
1225                 }
1226             }else{
1227                 h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1228                 if(is_h264){
1229                     if(!transform_bypass)
1230                         h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
1231                 }else
1232                     ff_svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
1233             }
1234             if(h->deblocking_filter)
1235                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
1236         }else if(is_h264){
1237             hl_motion(h, dest_y, dest_cb, dest_cr,
1238                       s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1239                       s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1240                       s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
1241         }
1242
1243
1244         if(!IS_INTRA4x4(mb_type)){
1245             if(is_h264){
1246                 if(IS_INTRA16x16(mb_type)){
1247                     if(transform_bypass){
1248                         if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1249                             h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
1250                         }else{
1251                             for(i=0; i<16; i++){
1252                                 if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1253                                     s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
1254                             }
1255                         }
1256                     }else{
1257                          s->dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1258                     }
1259                 }else if(h->cbp&15){
1260                     if(transform_bypass){
1261                         const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1262                         idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1263                         for(i=0; i<16; i+=di){
1264                             if(h->non_zero_count_cache[ scan8[i] ]){
1265                                 idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
1266                             }
1267                         }
1268                     }else{
1269                         if(IS_8x8DCT(mb_type)){
1270                             s->dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1271                         }else{
1272                             s->dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1273                         }
1274                     }
1275                 }
1276             }else{
1277                 for(i=0; i<16; i++){
1278                     if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
1279                         uint8_t * const ptr= dest_y + block_offset[i];
1280                         ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1281                     }
1282                 }
1283             }
1284         }
1285
1286         if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1287             uint8_t *dest[2] = {dest_cb, dest_cr};
1288             if(transform_bypass){
1289                 if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1290                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
1291                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
1292                 }else{
1293                     idct_add = s->dsp.add_pixels4;
1294                     for(i=16; i<16+8; i++){
1295                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1296                             idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1297                     }
1298                 }
1299             }else{
1300                 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]);
1301                 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]);
1302                 if(is_h264){
1303                     idct_add = s->dsp.h264_idct_add;
1304                     idct_dc_add = s->dsp.h264_idct_dc_add;
1305                     for(i=16; i<16+8; i++){
1306                         if(h->non_zero_count_cache[ scan8[i] ])
1307                             idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1308                         else if(h->mb[i*16])
1309                             idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1310                     }
1311                 }else{
1312                     for(i=16; i<16+8; i++){
1313                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1314                             uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
1315                             ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[s->qscale + 12] - 12, 2);
1316                         }
1317                     }
1318                 }
1319             }
1320         }
1321     }
1322     if(h->cbp || IS_INTRA(mb_type))
1323         s->dsp.clear_blocks(h->mb);
1324 }
1325
1326 /**
1327  * Process a macroblock; this case avoids checks for expensive uncommon cases.
1328  */
1329 static void hl_decode_mb_simple(H264Context *h){
1330     hl_decode_mb_internal(h, 1);
1331 }
1332
1333 /**
1334  * Process a macroblock; this handles edge cases, such as interlacing.
1335  */
1336 static void av_noinline hl_decode_mb_complex(H264Context *h){
1337     hl_decode_mb_internal(h, 0);
1338 }
1339
1340 void ff_h264_hl_decode_mb(H264Context *h){
1341     MpegEncContext * const s = &h->s;
1342     const int mb_xy= h->mb_xy;
1343     const int mb_type= s->current_picture.mb_type[mb_xy];
1344     int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
1345
1346     if (is_complex)
1347         hl_decode_mb_complex(h);
1348     else hl_decode_mb_simple(h);
1349 }
1350
1351 static int pred_weight_table(H264Context *h){
1352     MpegEncContext * const s = &h->s;
1353     int list, i;
1354     int luma_def, chroma_def;
1355
1356     h->use_weight= 0;
1357     h->use_weight_chroma= 0;
1358     h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
1359     h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
1360     luma_def = 1<<h->luma_log2_weight_denom;
1361     chroma_def = 1<<h->chroma_log2_weight_denom;
1362
1363     for(list=0; list<2; list++){
1364         h->luma_weight_flag[list]   = 0;
1365         h->chroma_weight_flag[list] = 0;
1366         for(i=0; i<h->ref_count[list]; i++){
1367             int luma_weight_flag, chroma_weight_flag;
1368
1369             luma_weight_flag= get_bits1(&s->gb);
1370             if(luma_weight_flag){
1371                 h->luma_weight[i][list][0]= get_se_golomb(&s->gb);
1372                 h->luma_weight[i][list][1]= get_se_golomb(&s->gb);
1373                 if(   h->luma_weight[i][list][0] != luma_def
1374                    || h->luma_weight[i][list][1] != 0) {
1375                     h->use_weight= 1;
1376                     h->luma_weight_flag[list]= 1;
1377                 }
1378             }else{
1379                 h->luma_weight[i][list][0]= luma_def;
1380                 h->luma_weight[i][list][1]= 0;
1381             }
1382
1383             if(CHROMA){
1384                 chroma_weight_flag= get_bits1(&s->gb);
1385                 if(chroma_weight_flag){
1386                     int j;
1387                     for(j=0; j<2; j++){
1388                         h->chroma_weight[i][list][j][0]= get_se_golomb(&s->gb);
1389                         h->chroma_weight[i][list][j][1]= get_se_golomb(&s->gb);
1390                         if(   h->chroma_weight[i][list][j][0] != chroma_def
1391                            || h->chroma_weight[i][list][j][1] != 0) {
1392                             h->use_weight_chroma= 1;
1393                             h->chroma_weight_flag[list]= 1;
1394                         }
1395                     }
1396                 }else{
1397                     int j;
1398                     for(j=0; j<2; j++){
1399                         h->chroma_weight[i][list][j][0]= chroma_def;
1400                         h->chroma_weight[i][list][j][1]= 0;
1401                     }
1402                 }
1403             }
1404         }
1405         if(h->slice_type_nos != FF_B_TYPE) break;
1406     }
1407     h->use_weight= h->use_weight || h->use_weight_chroma;
1408     return 0;
1409 }
1410
1411 static void implicit_weight_table(H264Context *h){
1412     MpegEncContext * const s = &h->s;
1413     int ref0, ref1, i;
1414     int cur_poc = s->current_picture_ptr->poc;
1415
1416     for (i = 0; i < 2; i++) {
1417         h->luma_weight_flag[i]   = 0;
1418         h->chroma_weight_flag[i] = 0;
1419     }
1420
1421     if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
1422        && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
1423         h->use_weight= 0;
1424         h->use_weight_chroma= 0;
1425         return;
1426     }
1427
1428     h->use_weight= 2;
1429     h->use_weight_chroma= 2;
1430     h->luma_log2_weight_denom= 5;
1431     h->chroma_log2_weight_denom= 5;
1432
1433     for(ref0=0; ref0 < h->ref_count[0]; ref0++){
1434         int poc0 = h->ref_list[0][ref0].poc;
1435         for(ref1=0; ref1 < h->ref_count[1]; ref1++){
1436             int poc1 = h->ref_list[1][ref1].poc;
1437             int td = av_clip(poc1 - poc0, -128, 127);
1438             h->implicit_weight[ref0][ref1] = 32;
1439             if(td){
1440                 int tb = av_clip(cur_poc - poc0, -128, 127);
1441                 int tx = (16384 + (FFABS(td) >> 1)) / td;
1442                 int dist_scale_factor = (tb*tx + 32) >> 8;
1443                 if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
1444                     h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
1445             }
1446         }
1447     }
1448 }
1449
1450 /**
1451  * instantaneous decoder refresh.
1452  */
1453 static void idr(H264Context *h){
1454     ff_h264_remove_all_refs(h);
1455     h->prev_frame_num= 0;
1456     h->prev_frame_num_offset= 0;
1457     h->prev_poc_msb=
1458     h->prev_poc_lsb= 0;
1459 }
1460
1461 /* forget old pics after a seek */
1462 static void flush_dpb(AVCodecContext *avctx){
1463     H264Context *h= avctx->priv_data;
1464     int i;
1465     for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
1466         if(h->delayed_pic[i])
1467             h->delayed_pic[i]->reference= 0;
1468         h->delayed_pic[i]= NULL;
1469     }
1470     h->outputed_poc= INT_MIN;
1471     h->prev_interlaced_frame = 1;
1472     idr(h);
1473     if(h->s.current_picture_ptr)
1474         h->s.current_picture_ptr->reference= 0;
1475     h->s.first_field= 0;
1476     ff_h264_reset_sei(h);
1477     ff_mpeg_flush(avctx);
1478 }
1479
1480 static int init_poc(H264Context *h){
1481     MpegEncContext * const s = &h->s;
1482     const int max_frame_num= 1<<h->sps.log2_max_frame_num;
1483     int field_poc[2];
1484     Picture *cur = s->current_picture_ptr;
1485
1486     h->frame_num_offset= h->prev_frame_num_offset;
1487     if(h->frame_num < h->prev_frame_num)
1488         h->frame_num_offset += max_frame_num;
1489
1490     if(h->sps.poc_type==0){
1491         const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
1492
1493         if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
1494             h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1495         else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
1496             h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1497         else
1498             h->poc_msb = h->prev_poc_msb;
1499 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
1500         field_poc[0] =
1501         field_poc[1] = h->poc_msb + h->poc_lsb;
1502         if(s->picture_structure == PICT_FRAME)
1503             field_poc[1] += h->delta_poc_bottom;
1504     }else if(h->sps.poc_type==1){
1505         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1506         int i;
1507
1508         if(h->sps.poc_cycle_length != 0)
1509             abs_frame_num = h->frame_num_offset + h->frame_num;
1510         else
1511             abs_frame_num = 0;
1512
1513         if(h->nal_ref_idc==0 && abs_frame_num > 0)
1514             abs_frame_num--;
1515
1516         expected_delta_per_poc_cycle = 0;
1517         for(i=0; i < h->sps.poc_cycle_length; i++)
1518             expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
1519
1520         if(abs_frame_num > 0){
1521             int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1522             int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1523
1524             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1525             for(i = 0; i <= frame_num_in_poc_cycle; i++)
1526                 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
1527         } else
1528             expectedpoc = 0;
1529
1530         if(h->nal_ref_idc == 0)
1531             expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1532
1533         field_poc[0] = expectedpoc + h->delta_poc[0];
1534         field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1535
1536         if(s->picture_structure == PICT_FRAME)
1537             field_poc[1] += h->delta_poc[1];
1538     }else{
1539         int poc= 2*(h->frame_num_offset + h->frame_num);
1540
1541         if(!h->nal_ref_idc)
1542             poc--;
1543
1544         field_poc[0]= poc;
1545         field_poc[1]= poc;
1546     }
1547
1548     if(s->picture_structure != PICT_BOTTOM_FIELD)
1549         s->current_picture_ptr->field_poc[0]= field_poc[0];
1550     if(s->picture_structure != PICT_TOP_FIELD)
1551         s->current_picture_ptr->field_poc[1]= field_poc[1];
1552     cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
1553
1554     return 0;
1555 }
1556
1557
1558 /**
1559  * initialize scan tables
1560  */
1561 static void init_scan_tables(H264Context *h){
1562     MpegEncContext * const s = &h->s;
1563     int i;
1564     if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
1565         memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
1566         memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
1567     }else{
1568         for(i=0; i<16; i++){
1569 #define T(x) (x>>2) | ((x<<2) & 0xF)
1570             h->zigzag_scan[i] = T(zigzag_scan[i]);
1571             h-> field_scan[i] = T( field_scan[i]);
1572 #undef T
1573         }
1574     }
1575     if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
1576         memcpy(h->zigzag_scan8x8,       ff_zigzag_direct,     64*sizeof(uint8_t));
1577         memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
1578         memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
1579         memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
1580     }else{
1581         for(i=0; i<64; i++){
1582 #define T(x) (x>>3) | ((x&7)<<3)
1583             h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
1584             h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
1585             h->field_scan8x8[i]        = T(field_scan8x8[i]);
1586             h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
1587 #undef T
1588         }
1589     }
1590     if(h->sps.transform_bypass){ //FIXME same ugly
1591         h->zigzag_scan_q0          = zigzag_scan;
1592         h->zigzag_scan8x8_q0       = ff_zigzag_direct;
1593         h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
1594         h->field_scan_q0           = field_scan;
1595         h->field_scan8x8_q0        = field_scan8x8;
1596         h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
1597     }else{
1598         h->zigzag_scan_q0          = h->zigzag_scan;
1599         h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
1600         h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
1601         h->field_scan_q0           = h->field_scan;
1602         h->field_scan8x8_q0        = h->field_scan8x8;
1603         h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
1604     }
1605 }
1606
1607 static void field_end(H264Context *h){
1608     MpegEncContext * const s = &h->s;
1609     AVCodecContext * const avctx= s->avctx;
1610     s->mb_y= 0;
1611
1612     s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
1613     s->current_picture_ptr->pict_type= s->pict_type;
1614
1615     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1616         ff_vdpau_h264_set_reference_frames(s);
1617
1618     if(!s->dropable) {
1619         ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1620         h->prev_poc_msb= h->poc_msb;
1621         h->prev_poc_lsb= h->poc_lsb;
1622     }
1623     h->prev_frame_num_offset= h->frame_num_offset;
1624     h->prev_frame_num= h->frame_num;
1625
1626     if (avctx->hwaccel) {
1627         if (avctx->hwaccel->end_frame(avctx) < 0)
1628             av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1629     }
1630
1631     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1632         ff_vdpau_h264_picture_complete(s);
1633
1634     /*
1635      * FIXME: Error handling code does not seem to support interlaced
1636      * when slices span multiple rows
1637      * The ff_er_add_slice calls don't work right for bottom
1638      * fields; they cause massive erroneous error concealing
1639      * Error marking covers both fields (top and bottom).
1640      * This causes a mismatched s->error_count
1641      * and a bad error table. Further, the error count goes to
1642      * INT_MAX when called for bottom field, because mb_y is
1643      * past end by one (callers fault) and resync_mb_y != 0
1644      * causes problems for the first MB line, too.
1645      */
1646     if (!FIELD_PICTURE)
1647         ff_er_frame_end(s);
1648
1649     MPV_frame_end(s);
1650
1651     h->current_slice=0;
1652 }
1653
1654 /**
1655  * Replicates H264 "master" context to thread contexts.
1656  */
1657 static void clone_slice(H264Context *dst, H264Context *src)
1658 {
1659     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
1660     dst->s.current_picture_ptr  = src->s.current_picture_ptr;
1661     dst->s.current_picture      = src->s.current_picture;
1662     dst->s.linesize             = src->s.linesize;
1663     dst->s.uvlinesize           = src->s.uvlinesize;
1664     dst->s.first_field          = src->s.first_field;
1665
1666     dst->prev_poc_msb           = src->prev_poc_msb;
1667     dst->prev_poc_lsb           = src->prev_poc_lsb;
1668     dst->prev_frame_num_offset  = src->prev_frame_num_offset;
1669     dst->prev_frame_num         = src->prev_frame_num;
1670     dst->short_ref_count        = src->short_ref_count;
1671
1672     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
1673     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
1674     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1675     memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
1676
1677     memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
1678     memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
1679 }
1680
1681 /**
1682  * decodes a slice header.
1683  * This will also call MPV_common_init() and frame_start() as needed.
1684  *
1685  * @param h h264context
1686  * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
1687  *
1688  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1689  */
1690 static int decode_slice_header(H264Context *h, H264Context *h0){
1691     MpegEncContext * const s = &h->s;
1692     MpegEncContext * const s0 = &h0->s;
1693     unsigned int first_mb_in_slice;
1694     unsigned int pps_id;
1695     int num_ref_idx_active_override_flag;
1696     unsigned int slice_type, tmp, i, j;
1697     int default_ref_list_done = 0;
1698     int last_pic_structure;
1699
1700     s->dropable= h->nal_ref_idc == 0;
1701
1702     if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
1703         s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
1704         s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
1705     }else{
1706         s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
1707         s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
1708     }
1709
1710     first_mb_in_slice= get_ue_golomb(&s->gb);
1711
1712     if(first_mb_in_slice == 0){ //FIXME better field boundary detection
1713         if(h0->current_slice && FIELD_PICTURE){
1714             field_end(h);
1715         }
1716
1717         h0->current_slice = 0;
1718         if (!s0->first_field)
1719             s->current_picture_ptr= NULL;
1720     }
1721
1722     slice_type= get_ue_golomb_31(&s->gb);
1723     if(slice_type > 9){
1724         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);
1725         return -1;
1726     }
1727     if(slice_type > 4){
1728         slice_type -= 5;
1729         h->slice_type_fixed=1;
1730     }else
1731         h->slice_type_fixed=0;
1732
1733     slice_type= golomb_to_pict_type[ slice_type ];
1734     if (slice_type == FF_I_TYPE
1735         || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
1736         default_ref_list_done = 1;
1737     }
1738     h->slice_type= slice_type;
1739     h->slice_type_nos= slice_type & 3;
1740
1741     s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
1742
1743     pps_id= get_ue_golomb(&s->gb);
1744     if(pps_id>=MAX_PPS_COUNT){
1745         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
1746         return -1;
1747     }
1748     if(!h0->pps_buffers[pps_id]) {
1749         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
1750         return -1;
1751     }
1752     h->pps= *h0->pps_buffers[pps_id];
1753
1754     if(!h0->sps_buffers[h->pps.sps_id]) {
1755         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
1756         return -1;
1757     }
1758     h->sps = *h0->sps_buffers[h->pps.sps_id];
1759
1760     if(h == h0 && h->dequant_coeff_pps != pps_id){
1761         h->dequant_coeff_pps = pps_id;
1762         init_dequant_tables(h);
1763     }
1764
1765     s->mb_width= h->sps.mb_width;
1766     s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1767
1768     h->b_stride=  s->mb_width*4;
1769
1770     s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
1771     if(h->sps.frame_mbs_only_flag)
1772         s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
1773     else
1774         s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
1775
1776     if (s->context_initialized
1777         && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
1778         if(h != h0)
1779             return -1;   // width / height changed during parallelized decoding
1780         free_tables(h);
1781         flush_dpb(s->avctx);
1782         MPV_common_end(s);
1783     }
1784     if (!s->context_initialized) {
1785         if(h != h0)
1786             return -1;  // we cant (re-)initialize context during parallel decoding
1787
1788         avcodec_set_dimensions(s->avctx, s->width, s->height);
1789         s->avctx->sample_aspect_ratio= h->sps.sar;
1790         if(!s->avctx->sample_aspect_ratio.den)
1791             s->avctx->sample_aspect_ratio.den = 1;
1792
1793         if(h->sps.video_signal_type_present_flag){
1794             s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
1795             if(h->sps.colour_description_present_flag){
1796                 s->avctx->color_primaries = h->sps.color_primaries;
1797                 s->avctx->color_trc       = h->sps.color_trc;
1798                 s->avctx->colorspace      = h->sps.colorspace;
1799             }
1800         }
1801
1802         if(h->sps.timing_info_present_flag){
1803             int64_t den= h->sps.time_scale;
1804             if(h->x264_build < 44U)
1805                 den *= 2;
1806             av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
1807                       h->sps.num_units_in_tick, den, 1<<30);
1808         }
1809         s->avctx->pix_fmt = s->avctx->get_format(s->avctx, s->avctx->codec->pix_fmts);
1810         s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
1811
1812         if (MPV_common_init(s) < 0)
1813             return -1;
1814         s->first_field = 0;
1815         h->prev_interlaced_frame = 1;
1816
1817         init_scan_tables(h);
1818         ff_h264_alloc_tables(h);
1819
1820         for(i = 1; i < s->avctx->thread_count; i++) {
1821             H264Context *c;
1822             c = h->thread_context[i] = av_malloc(sizeof(H264Context));
1823             memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
1824             memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
1825             c->sps = h->sps;
1826             c->pps = h->pps;
1827             init_scan_tables(c);
1828             clone_tables(c, h, i);
1829         }
1830
1831         for(i = 0; i < s->avctx->thread_count; i++)
1832             if(context_init(h->thread_context[i]) < 0)
1833                 return -1;
1834     }
1835
1836     h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
1837
1838     h->mb_mbaff = 0;
1839     h->mb_aff_frame = 0;
1840     last_pic_structure = s0->picture_structure;
1841     if(h->sps.frame_mbs_only_flag){
1842         s->picture_structure= PICT_FRAME;
1843     }else{
1844         if(get_bits1(&s->gb)) { //field_pic_flag
1845             s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
1846         } else {
1847             s->picture_structure= PICT_FRAME;
1848             h->mb_aff_frame = h->sps.mb_aff;
1849         }
1850     }
1851     h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
1852
1853     if(h0->current_slice == 0){
1854         while(h->frame_num !=  h->prev_frame_num &&
1855               h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
1856             av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
1857             if (ff_h264_frame_start(h) < 0)
1858                 return -1;
1859             h->prev_frame_num++;
1860             h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
1861             s->current_picture_ptr->frame_num= h->prev_frame_num;
1862             ff_h264_execute_ref_pic_marking(h, NULL, 0);
1863         }
1864
1865         /* See if we have a decoded first field looking for a pair... */
1866         if (s0->first_field) {
1867             assert(s0->current_picture_ptr);
1868             assert(s0->current_picture_ptr->data[0]);
1869             assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
1870
1871             /* figure out if we have a complementary field pair */
1872             if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
1873                 /*
1874                  * Previous field is unmatched. Don't display it, but let it
1875                  * remain for reference if marked as such.
1876                  */
1877                 s0->current_picture_ptr = NULL;
1878                 s0->first_field = FIELD_PICTURE;
1879
1880             } else {
1881                 if (h->nal_ref_idc &&
1882                         s0->current_picture_ptr->reference &&
1883                         s0->current_picture_ptr->frame_num != h->frame_num) {
1884                     /*
1885                      * This and previous field were reference, but had
1886                      * different frame_nums. Consider this field first in
1887                      * pair. Throw away previous field except for reference
1888                      * purposes.
1889                      */
1890                     s0->first_field = 1;
1891                     s0->current_picture_ptr = NULL;
1892
1893                 } else {
1894                     /* Second field in complementary pair */
1895                     s0->first_field = 0;
1896                 }
1897             }
1898
1899         } else {
1900             /* Frame or first field in a potentially complementary pair */
1901             assert(!s0->current_picture_ptr);
1902             s0->first_field = FIELD_PICTURE;
1903         }
1904
1905         if((!FIELD_PICTURE || s0->first_field) && ff_h264_frame_start(h) < 0) {
1906             s0->first_field = 0;
1907             return -1;
1908         }
1909     }
1910     if(h != h0)
1911         clone_slice(h, h0);
1912
1913     s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
1914
1915     assert(s->mb_num == s->mb_width * s->mb_height);
1916     if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
1917        first_mb_in_slice                    >= s->mb_num){
1918         av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1919         return -1;
1920     }
1921     s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
1922     s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
1923     if (s->picture_structure == PICT_BOTTOM_FIELD)
1924         s->resync_mb_y = s->mb_y = s->mb_y + 1;
1925     assert(s->mb_y < s->mb_height);
1926
1927     if(s->picture_structure==PICT_FRAME){
1928         h->curr_pic_num=   h->frame_num;
1929         h->max_pic_num= 1<< h->sps.log2_max_frame_num;
1930     }else{
1931         h->curr_pic_num= 2*h->frame_num + 1;
1932         h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
1933     }
1934
1935     if(h->nal_unit_type == NAL_IDR_SLICE){
1936         get_ue_golomb(&s->gb); /* idr_pic_id */
1937     }
1938
1939     if(h->sps.poc_type==0){
1940         h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
1941
1942         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
1943             h->delta_poc_bottom= get_se_golomb(&s->gb);
1944         }
1945     }
1946
1947     if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
1948         h->delta_poc[0]= get_se_golomb(&s->gb);
1949
1950         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
1951             h->delta_poc[1]= get_se_golomb(&s->gb);
1952     }
1953
1954     init_poc(h);
1955
1956     if(h->pps.redundant_pic_cnt_present){
1957         h->redundant_pic_count= get_ue_golomb(&s->gb);
1958     }
1959
1960     //set defaults, might be overridden a few lines later
1961     h->ref_count[0]= h->pps.ref_count[0];
1962     h->ref_count[1]= h->pps.ref_count[1];
1963
1964     if(h->slice_type_nos != FF_I_TYPE){
1965         if(h->slice_type_nos == FF_B_TYPE){
1966             h->direct_spatial_mv_pred= get_bits1(&s->gb);
1967         }
1968         num_ref_idx_active_override_flag= get_bits1(&s->gb);
1969
1970         if(num_ref_idx_active_override_flag){
1971             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
1972             if(h->slice_type_nos==FF_B_TYPE)
1973                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
1974
1975             if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
1976                 av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
1977                 h->ref_count[0]= h->ref_count[1]= 1;
1978                 return -1;
1979             }
1980         }
1981         if(h->slice_type_nos == FF_B_TYPE)
1982             h->list_count= 2;
1983         else
1984             h->list_count= 1;
1985     }else
1986         h->list_count= 0;
1987
1988     if(!default_ref_list_done){
1989         ff_h264_fill_default_ref_list(h);
1990     }
1991
1992     if(h->slice_type_nos!=FF_I_TYPE && ff_h264_decode_ref_pic_list_reordering(h) < 0)
1993         return -1;
1994
1995     if(h->slice_type_nos!=FF_I_TYPE){
1996         s->last_picture_ptr= &h->ref_list[0][0];
1997         ff_copy_picture(&s->last_picture, s->last_picture_ptr);
1998     }
1999     if(h->slice_type_nos==FF_B_TYPE){
2000         s->next_picture_ptr= &h->ref_list[1][0];
2001         ff_copy_picture(&s->next_picture, s->next_picture_ptr);
2002     }
2003
2004     if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
2005        ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
2006         pred_weight_table(h);
2007     else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE){
2008         implicit_weight_table(h);
2009     }else {
2010         h->use_weight = 0;
2011         for (i = 0; i < 2; i++) {
2012             h->luma_weight_flag[i]   = 0;
2013             h->chroma_weight_flag[i] = 0;
2014         }
2015     }
2016
2017     if(h->nal_ref_idc)
2018         ff_h264_decode_ref_pic_marking(h0, &s->gb);
2019
2020     if(FRAME_MBAFF)
2021         ff_h264_fill_mbaff_ref_list(h);
2022
2023     if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
2024         ff_h264_direct_dist_scale_factor(h);
2025     ff_h264_direct_ref_list_init(h);
2026
2027     if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
2028         tmp = get_ue_golomb_31(&s->gb);
2029         if(tmp > 2){
2030             av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
2031             return -1;
2032         }
2033         h->cabac_init_idc= tmp;
2034     }
2035
2036     h->last_qscale_diff = 0;
2037     tmp = h->pps.init_qp + get_se_golomb(&s->gb);
2038     if(tmp>51){
2039         av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
2040         return -1;
2041     }
2042     s->qscale= tmp;
2043     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2044     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2045     //FIXME qscale / qp ... stuff
2046     if(h->slice_type == FF_SP_TYPE){
2047         get_bits1(&s->gb); /* sp_for_switch_flag */
2048     }
2049     if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
2050         get_se_golomb(&s->gb); /* slice_qs_delta */
2051     }
2052
2053     h->deblocking_filter = 1;
2054     h->slice_alpha_c0_offset = 52;
2055     h->slice_beta_offset = 52;
2056     if( h->pps.deblocking_filter_parameters_present ) {
2057         tmp= get_ue_golomb_31(&s->gb);
2058         if(tmp > 2){
2059             av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
2060             return -1;
2061         }
2062         h->deblocking_filter= tmp;
2063         if(h->deblocking_filter < 2)
2064             h->deblocking_filter^= 1; // 1<->0
2065
2066         if( h->deblocking_filter ) {
2067             h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
2068             h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
2069             if(   h->slice_alpha_c0_offset > 104U
2070                || h->slice_beta_offset     > 104U){
2071                 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);
2072                 return -1;
2073             }
2074         }
2075     }
2076
2077     if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
2078        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
2079        ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
2080        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2081         h->deblocking_filter= 0;
2082
2083     if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
2084         if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
2085             /* Cheat slightly for speed:
2086                Do not bother to deblock across slices. */
2087             h->deblocking_filter = 2;
2088         } else {
2089             h0->max_contexts = 1;
2090             if(!h0->single_decode_warning) {
2091                 av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
2092                 h0->single_decode_warning = 1;
2093             }
2094             if(h != h0)
2095                 return 1; // deblocking switched inside frame
2096         }
2097     }
2098     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]);
2099
2100 #if 0 //FMO
2101     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
2102         slice_group_change_cycle= get_bits(&s->gb, ?);
2103 #endif
2104
2105     h0->last_slice_type = slice_type;
2106     h->slice_num = ++h0->current_slice;
2107     if(h->slice_num >= MAX_SLICES){
2108         av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
2109     }
2110
2111     for(j=0; j<2; j++){
2112         int id_list[16];
2113         int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
2114         for(i=0; i<16; i++){
2115             id_list[i]= 60;
2116             if(h->ref_list[j][i].data[0]){
2117                 int k;
2118                 uint8_t *base= h->ref_list[j][i].base[0];
2119                 for(k=0; k<h->short_ref_count; k++)
2120                     if(h->short_ref[k]->base[0] == base){
2121                         id_list[i]= k;
2122                         break;
2123                     }
2124                 for(k=0; k<h->long_ref_count; k++)
2125                     if(h->long_ref[k] && h->long_ref[k]->base[0] == base){
2126                         id_list[i]= h->short_ref_count + k;
2127                         break;
2128                     }
2129             }
2130         }
2131
2132         ref2frm[0]=
2133         ref2frm[1]= -1;
2134         for(i=0; i<16; i++)
2135             ref2frm[i+2]= 4*id_list[i]
2136                           +(h->ref_list[j][i].reference&3);
2137         ref2frm[18+0]=
2138         ref2frm[18+1]= -1;
2139         for(i=16; i<48; i++)
2140             ref2frm[i+4]= 4*id_list[(i-16)>>1]
2141                           +(h->ref_list[j][i].reference&3);
2142     }
2143
2144     h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
2145     h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
2146
2147     s->avctx->refs= h->sps.ref_frame_count;
2148
2149     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2150         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",
2151                h->slice_num,
2152                (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
2153                first_mb_in_slice,
2154                av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
2155                pps_id, h->frame_num,
2156                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
2157                h->ref_count[0], h->ref_count[1],
2158                s->qscale,
2159                h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
2160                h->use_weight,
2161                h->use_weight==1 && h->use_weight_chroma ? "c" : "",
2162                h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
2163                );
2164     }
2165
2166     return 0;
2167 }
2168
2169 int ff_h264_get_slice_type(const H264Context *h)
2170 {
2171     switch (h->slice_type) {
2172     case FF_P_TYPE:  return 0;
2173     case FF_B_TYPE:  return 1;
2174     case FF_I_TYPE:  return 2;
2175     case FF_SP_TYPE: return 3;
2176     case FF_SI_TYPE: return 4;
2177     default:         return -1;
2178     }
2179 }
2180
2181 static void loop_filter(H264Context *h){
2182     MpegEncContext * const s = &h->s;
2183     uint8_t  *dest_y, *dest_cb, *dest_cr;
2184     int linesize, uvlinesize, mb_x, mb_y;
2185     const int end_mb_y= s->mb_y + FRAME_MBAFF;
2186     const int old_slice_type= h->slice_type;
2187
2188     if(h->deblocking_filter) {
2189         for(mb_x= 0; mb_x<s->mb_width; mb_x++){
2190             for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
2191                 int mb_xy, mb_type;
2192                 mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
2193                 h->slice_num= h->slice_table[mb_xy];
2194                 mb_type= s->current_picture.mb_type[mb_xy];
2195                 h->list_count= h->list_counts[mb_xy];
2196
2197                 if(FRAME_MBAFF)
2198                     h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2199
2200                 s->mb_x= mb_x;
2201                 s->mb_y= mb_y;
2202                 dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2203                 dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2204                 dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2205                     //FIXME simplify above
2206
2207                 if (MB_FIELD) {
2208                     linesize   = h->mb_linesize   = s->linesize * 2;
2209                     uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2210                     if(mb_y&1){ //FIXME move out of this function?
2211                         dest_y -= s->linesize*15;
2212                         dest_cb-= s->uvlinesize*7;
2213                         dest_cr-= s->uvlinesize*7;
2214                     }
2215                 } else {
2216                     linesize   = h->mb_linesize   = s->linesize;
2217                     uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2218                 }
2219                 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
2220                 if(fill_filter_caches(h, mb_type))
2221                     continue;
2222                 h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2223                 h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2224
2225                 if (FRAME_MBAFF) {
2226                     ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2227                 } else {
2228                     ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2229                 }
2230             }
2231         }
2232     }
2233     h->slice_type= old_slice_type;
2234     s->mb_x= 0;
2235     s->mb_y= end_mb_y - FRAME_MBAFF;
2236     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2237     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2238 }
2239
2240 static void predict_field_decoding_flag(H264Context *h){
2241     MpegEncContext * const s = &h->s;
2242     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
2243     int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
2244                 ? s->current_picture.mb_type[mb_xy-1]
2245                 : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
2246                 ? s->current_picture.mb_type[mb_xy-s->mb_stride]
2247                 : 0;
2248     h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2249 }
2250
2251 static int decode_slice(struct AVCodecContext *avctx, void *arg){
2252     H264Context *h = *(void**)arg;
2253     MpegEncContext * const s = &h->s;
2254     const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
2255
2256     s->mb_skip_run= -1;
2257
2258     h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
2259                     (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
2260
2261     if( h->pps.cabac ) {
2262         /* realign */
2263         align_get_bits( &s->gb );
2264
2265         /* init cabac */
2266         ff_init_cabac_states( &h->cabac);
2267         ff_init_cabac_decoder( &h->cabac,
2268                                s->gb.buffer + get_bits_count(&s->gb)/8,
2269                                (get_bits_left(&s->gb) + 7)/8);
2270
2271         ff_h264_init_cabac_states(h);
2272
2273         for(;;){
2274 //START_TIMER
2275             int ret = ff_h264_decode_mb_cabac(h);
2276             int eos;
2277 //STOP_TIMER("decode_mb_cabac")
2278
2279             if(ret>=0) ff_h264_hl_decode_mb(h);
2280
2281             if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
2282                 s->mb_y++;
2283
2284                 ret = ff_h264_decode_mb_cabac(h);
2285
2286                 if(ret>=0) ff_h264_hl_decode_mb(h);
2287                 s->mb_y--;
2288             }
2289             eos = get_cabac_terminate( &h->cabac );
2290
2291             if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
2292                 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);
2293                 return 0;
2294             }
2295             if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2296                 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);
2297                 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);
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                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
2309                         predict_field_decoding_flag(h);
2310                 }
2311             }
2312
2313             if( eos || s->mb_y >= s->mb_height ) {
2314                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2315                 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);
2316                 return 0;
2317             }
2318         }
2319
2320     } else {
2321         for(;;){
2322             int ret = ff_h264_decode_mb_cavlc(h);
2323
2324             if(ret>=0) ff_h264_hl_decode_mb(h);
2325
2326             if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
2327                 s->mb_y++;
2328                 ret = ff_h264_decode_mb_cavlc(h);
2329
2330                 if(ret>=0) ff_h264_hl_decode_mb(h);
2331                 s->mb_y--;
2332             }
2333
2334             if(ret<0){
2335                 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2336                 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);
2337
2338                 return -1;
2339             }
2340
2341             if(++s->mb_x >= s->mb_width){
2342                 s->mb_x=0;
2343                 loop_filter(h);
2344                 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2345                 ++s->mb_y;
2346                 if(FIELD_OR_MBAFF_PICTURE) {
2347                     ++s->mb_y;
2348                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
2349                         predict_field_decoding_flag(h);
2350                 }
2351                 if(s->mb_y >= s->mb_height){
2352                     tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2353
2354                     if(get_bits_count(&s->gb) == s->gb.size_in_bits ) {
2355                         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);
2356
2357                         return 0;
2358                     }else{
2359                         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);
2360
2361                         return -1;
2362                     }
2363                 }
2364             }
2365
2366             if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
2367                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2368                 if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
2369                     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);
2370
2371                     return 0;
2372                 }else{
2373                     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);
2374
2375                     return -1;
2376                 }
2377             }
2378         }
2379     }
2380
2381 #if 0
2382     for(;s->mb_y < s->mb_height; s->mb_y++){
2383         for(;s->mb_x < s->mb_width; s->mb_x++){
2384             int ret= decode_mb(h);
2385
2386             ff_h264_hl_decode_mb(h);
2387
2388             if(ret<0){
2389                 av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2390                 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);
2391
2392                 return -1;
2393             }
2394
2395             if(++s->mb_x >= s->mb_width){
2396                 s->mb_x=0;
2397                 if(++s->mb_y >= s->mb_height){
2398                     if(get_bits_count(s->gb) == s->gb.size_in_bits){
2399                         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);
2400
2401                         return 0;
2402                     }else{
2403                         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);
2404
2405                         return -1;
2406                     }
2407                 }
2408             }
2409
2410             if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
2411                 if(get_bits_count(s->gb) == s->gb.size_in_bits){
2412                     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);
2413
2414                     return 0;
2415                 }else{
2416                     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);
2417
2418                     return -1;
2419                 }
2420             }
2421         }
2422         s->mb_x=0;
2423         ff_draw_horiz_band(s, 16*s->mb_y, 16);
2424     }
2425 #endif
2426     return -1; //not reached
2427 }
2428
2429 /**
2430  * Call decode_slice() for each context.
2431  *
2432  * @param h h264 master context
2433  * @param context_count number of contexts to execute
2434  */
2435 static void execute_decode_slices(H264Context *h, int context_count){
2436     MpegEncContext * const s = &h->s;
2437     AVCodecContext * const avctx= s->avctx;
2438     H264Context *hx;
2439     int i;
2440
2441     if (s->avctx->hwaccel)
2442         return;
2443     if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2444         return;
2445     if(context_count == 1) {
2446         decode_slice(avctx, &h);
2447     } else {
2448         for(i = 1; i < context_count; i++) {
2449             hx = h->thread_context[i];
2450             hx->s.error_recognition = avctx->error_recognition;
2451             hx->s.error_count = 0;
2452         }
2453
2454         avctx->execute(avctx, (void *)decode_slice,
2455                        h->thread_context, NULL, context_count, sizeof(void*));
2456
2457         /* pull back stuff from slices to master context */
2458         hx = h->thread_context[context_count - 1];
2459         s->mb_x = hx->s.mb_x;
2460         s->mb_y = hx->s.mb_y;
2461         s->dropable = hx->s.dropable;
2462         s->picture_structure = hx->s.picture_structure;
2463         for(i = 1; i < context_count; i++)
2464             h->s.error_count += h->thread_context[i]->s.error_count;
2465     }
2466 }
2467
2468
2469 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
2470     MpegEncContext * const s = &h->s;
2471     AVCodecContext * const avctx= s->avctx;
2472     int buf_index=0;
2473     H264Context *hx; ///< thread context
2474     int context_count = 0;
2475     int next_avc= h->is_avc ? 0 : buf_size;
2476
2477     h->max_contexts = avctx->thread_count;
2478 #if 0
2479     int i;
2480     for(i=0; i<50; i++){
2481         av_log(NULL, AV_LOG_ERROR,"%02X ", buf[i]);
2482     }
2483 #endif
2484     if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
2485         h->current_slice = 0;
2486         if (!s->first_field)
2487             s->current_picture_ptr= NULL;
2488         ff_h264_reset_sei(h);
2489     }
2490
2491     for(;;){
2492         int consumed;
2493         int dst_length;
2494         int bit_length;
2495         const uint8_t *ptr;
2496         int i, nalsize = 0;
2497         int err;
2498
2499         if(buf_index >= next_avc) {
2500             if(buf_index >= buf_size) break;
2501             nalsize = 0;
2502             for(i = 0; i < h->nal_length_size; i++)
2503                 nalsize = (nalsize << 8) | buf[buf_index++];
2504             if(nalsize <= 1 || nalsize > buf_size - buf_index){
2505                 if(nalsize == 1){
2506                     buf_index++;
2507                     continue;
2508                 }else{
2509                     av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
2510                     break;
2511                 }
2512             }
2513             next_avc= buf_index + nalsize;
2514         } else {
2515             // start code prefix search
2516             for(; buf_index + 3 < next_avc; buf_index++){
2517                 // This should always succeed in the first iteration.
2518                 if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
2519                     break;
2520             }
2521
2522             if(buf_index+3 >= buf_size) break;
2523
2524             buf_index+=3;
2525             if(buf_index >= next_avc) continue;
2526         }
2527
2528         hx = h->thread_context[context_count];
2529
2530         ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
2531         if (ptr==NULL || dst_length < 0){
2532             return -1;
2533         }
2534         i= buf_index + consumed;
2535         if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
2536            buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
2537             s->workaround_bugs |= FF_BUG_TRUNCATED;
2538
2539         if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
2540         while(ptr[dst_length - 1] == 0 && dst_length > 0)
2541             dst_length--;
2542         }
2543         bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
2544
2545         if(s->avctx->debug&FF_DEBUG_STARTCODE){
2546             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);
2547         }
2548
2549         if (h->is_avc && (nalsize != consumed) && nalsize){
2550             av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
2551         }
2552
2553         buf_index += consumed;
2554
2555         if(  (s->hurry_up == 1 && h->nal_ref_idc  == 0) //FIXME do not discard SEI id
2556            ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0))
2557             continue;
2558
2559       again:
2560         err = 0;
2561         switch(hx->nal_unit_type){
2562         case NAL_IDR_SLICE:
2563             if (h->nal_unit_type != NAL_IDR_SLICE) {
2564                 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
2565                 return -1;
2566             }
2567             idr(h); //FIXME ensure we don't loose some frames if there is reordering
2568         case NAL_SLICE:
2569             init_get_bits(&hx->s.gb, ptr, bit_length);
2570             hx->intra_gb_ptr=
2571             hx->inter_gb_ptr= &hx->s.gb;
2572             hx->s.data_partitioning = 0;
2573
2574             if((err = decode_slice_header(hx, h)))
2575                break;
2576
2577             avctx->profile = hx->sps.profile_idc;
2578             avctx->level   = hx->sps.level_idc;
2579
2580             if (s->avctx->hwaccel && h->current_slice == 1) {
2581                 if (s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
2582                     return -1;
2583             }
2584
2585             s->current_picture_ptr->key_frame |=
2586                     (hx->nal_unit_type == NAL_IDR_SLICE) ||
2587                     (h->sei_recovery_frame_cnt >= 0);
2588             if(hx->redundant_pic_count==0 && hx->s.hurry_up < 5
2589                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2590                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2591                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2592                && avctx->skip_frame < AVDISCARD_ALL){
2593                 if(avctx->hwaccel) {
2594                     if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
2595                         return -1;
2596                 }else
2597                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
2598                     static const uint8_t start_code[] = {0x00, 0x00, 0x01};
2599                     ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
2600                     ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
2601                 }else
2602                     context_count++;
2603             }
2604             break;
2605         case NAL_DPA:
2606             init_get_bits(&hx->s.gb, ptr, bit_length);
2607             hx->intra_gb_ptr=
2608             hx->inter_gb_ptr= NULL;
2609
2610             if ((err = decode_slice_header(hx, h)) < 0)
2611                 break;
2612
2613             avctx->profile = hx->sps.profile_idc;
2614             avctx->level   = hx->sps.level_idc;
2615
2616             hx->s.data_partitioning = 1;
2617
2618             break;
2619         case NAL_DPB:
2620             init_get_bits(&hx->intra_gb, ptr, bit_length);
2621             hx->intra_gb_ptr= &hx->intra_gb;
2622             break;
2623         case NAL_DPC:
2624             init_get_bits(&hx->inter_gb, ptr, bit_length);
2625             hx->inter_gb_ptr= &hx->inter_gb;
2626
2627             if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
2628                && s->context_initialized
2629                && s->hurry_up < 5
2630                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2631                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2632                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2633                && avctx->skip_frame < AVDISCARD_ALL)
2634                 context_count++;
2635             break;
2636         case NAL_SEI:
2637             init_get_bits(&s->gb, ptr, bit_length);
2638             ff_h264_decode_sei(h);
2639             break;
2640         case NAL_SPS:
2641             init_get_bits(&s->gb, ptr, bit_length);
2642             ff_h264_decode_seq_parameter_set(h);
2643
2644             if(s->flags& CODEC_FLAG_LOW_DELAY)
2645                 s->low_delay=1;
2646
2647             if(avctx->has_b_frames < 2)
2648                 avctx->has_b_frames= !s->low_delay;
2649             break;
2650         case NAL_PPS:
2651             init_get_bits(&s->gb, ptr, bit_length);
2652
2653             ff_h264_decode_picture_parameter_set(h, bit_length);
2654
2655             break;
2656         case NAL_AUD:
2657         case NAL_END_SEQUENCE:
2658         case NAL_END_STREAM:
2659         case NAL_FILLER_DATA:
2660         case NAL_SPS_EXT:
2661         case NAL_AUXILIARY_SLICE:
2662             break;
2663         default:
2664             av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
2665         }
2666
2667         if(context_count == h->max_contexts) {
2668             execute_decode_slices(h, context_count);
2669             context_count = 0;
2670         }
2671
2672         if (err < 0)
2673             av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
2674         else if(err == 1) {
2675             /* Slice could not be decoded in parallel mode, copy down
2676              * NAL unit stuff to context 0 and restart. Note that
2677              * rbsp_buffer is not transferred, but since we no longer
2678              * run in parallel mode this should not be an issue. */
2679             h->nal_unit_type = hx->nal_unit_type;
2680             h->nal_ref_idc   = hx->nal_ref_idc;
2681             hx = h;
2682             goto again;
2683         }
2684     }
2685     if(context_count)
2686         execute_decode_slices(h, context_count);
2687     return buf_index;
2688 }
2689
2690 /**
2691  * returns the number of bytes consumed for building the current frame
2692  */
2693 static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
2694         if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
2695         if(pos+10>buf_size) pos=buf_size; // oops ;)
2696
2697         return pos;
2698 }
2699
2700 static int decode_frame(AVCodecContext *avctx,
2701                              void *data, int *data_size,
2702                              AVPacket *avpkt)
2703 {
2704     const uint8_t *buf = avpkt->data;
2705     int buf_size = avpkt->size;
2706     H264Context *h = avctx->priv_data;
2707     MpegEncContext *s = &h->s;
2708     AVFrame *pict = data;
2709     int buf_index;
2710
2711     s->flags= avctx->flags;
2712     s->flags2= avctx->flags2;
2713
2714    /* end of stream, output what is still in the buffers */
2715     if (buf_size == 0) {
2716         Picture *out;
2717         int i, out_idx;
2718
2719 //FIXME factorize this with the output code below
2720         out = h->delayed_pic[0];
2721         out_idx = 0;
2722         for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2723             if(h->delayed_pic[i]->poc < out->poc){
2724                 out = h->delayed_pic[i];
2725                 out_idx = i;
2726             }
2727
2728         for(i=out_idx; h->delayed_pic[i]; i++)
2729             h->delayed_pic[i] = h->delayed_pic[i+1];
2730
2731         if(out){
2732             *data_size = sizeof(AVFrame);
2733             *pict= *(AVFrame*)out;
2734         }
2735
2736         return 0;
2737     }
2738
2739     buf_index=decode_nal_units(h, buf, buf_size);
2740     if(buf_index < 0)
2741         return -1;
2742
2743     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
2744         if (avctx->skip_frame >= AVDISCARD_NONREF || s->hurry_up) return 0;
2745         av_log(avctx, AV_LOG_ERROR, "no frame!\n");
2746         return -1;
2747     }
2748
2749     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
2750         Picture *out = s->current_picture_ptr;
2751         Picture *cur = s->current_picture_ptr;
2752         int i, pics, out_of_order, out_idx;
2753
2754         field_end(h);
2755
2756         if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
2757             /* Wait for second field. */
2758             *data_size = 0;
2759
2760         } else {
2761             cur->interlaced_frame = 0;
2762             cur->repeat_pict = 0;
2763
2764             /* Signal interlacing information externally. */
2765             /* Prioritize picture timing SEI information over used decoding process if it exists. */
2766
2767             if(h->sps.pic_struct_present_flag){
2768                 switch (h->sei_pic_struct)
2769                 {
2770                 case SEI_PIC_STRUCT_FRAME:
2771                     break;
2772                 case SEI_PIC_STRUCT_TOP_FIELD:
2773                 case SEI_PIC_STRUCT_BOTTOM_FIELD:
2774                     cur->interlaced_frame = 1;
2775                     break;
2776                 case SEI_PIC_STRUCT_TOP_BOTTOM:
2777                 case SEI_PIC_STRUCT_BOTTOM_TOP:
2778                     if (FIELD_OR_MBAFF_PICTURE)
2779                         cur->interlaced_frame = 1;
2780                     else
2781                         // try to flag soft telecine progressive
2782                         cur->interlaced_frame = h->prev_interlaced_frame;
2783                     break;
2784                 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
2785                 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
2786                     // Signal the possibility of telecined film externally (pic_struct 5,6)
2787                     // From these hints, let the applications decide if they apply deinterlacing.
2788                     cur->repeat_pict = 1;
2789                     break;
2790                 case SEI_PIC_STRUCT_FRAME_DOUBLING:
2791                     // Force progressive here, as doubling interlaced frame is a bad idea.
2792                     cur->repeat_pict = 2;
2793                     break;
2794                 case SEI_PIC_STRUCT_FRAME_TRIPLING:
2795                     cur->repeat_pict = 4;
2796                     break;
2797                 }
2798
2799                 if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
2800                     cur->interlaced_frame = (h->sei_ct_type & (1<<1)) != 0;
2801             }else{
2802                 /* Derive interlacing flag from used decoding process. */
2803                 cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
2804             }
2805             h->prev_interlaced_frame = cur->interlaced_frame;
2806
2807             if (cur->field_poc[0] != cur->field_poc[1]){
2808                 /* Derive top_field_first from field pocs. */
2809                 cur->top_field_first = cur->field_poc[0] < cur->field_poc[1];
2810             }else{
2811                 if(cur->interlaced_frame || h->sps.pic_struct_present_flag){
2812                     /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
2813                     if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
2814                       || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
2815                         cur->top_field_first = 1;
2816                     else
2817                         cur->top_field_first = 0;
2818                 }else{
2819                     /* Most likely progressive */
2820                     cur->top_field_first = 0;
2821                 }
2822             }
2823
2824         //FIXME do something with unavailable reference frames
2825
2826             /* Sort B-frames into display order */
2827
2828             if(h->sps.bitstream_restriction_flag
2829                && s->avctx->has_b_frames < h->sps.num_reorder_frames){
2830                 s->avctx->has_b_frames = h->sps.num_reorder_frames;
2831                 s->low_delay = 0;
2832             }
2833
2834             if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
2835                && !h->sps.bitstream_restriction_flag){
2836                 s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
2837                 s->low_delay= 0;
2838             }
2839
2840             pics = 0;
2841             while(h->delayed_pic[pics]) pics++;
2842
2843             assert(pics <= MAX_DELAYED_PIC_COUNT);
2844
2845             h->delayed_pic[pics++] = cur;
2846             if(cur->reference == 0)
2847                 cur->reference = DELAYED_PIC_REF;
2848
2849             out = h->delayed_pic[0];
2850             out_idx = 0;
2851             for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2852                 if(h->delayed_pic[i]->poc < out->poc){
2853                     out = h->delayed_pic[i];
2854                     out_idx = i;
2855                 }
2856             if(s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset))
2857                 h->outputed_poc= INT_MIN;
2858             out_of_order = out->poc < h->outputed_poc;
2859
2860             if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
2861                 { }
2862             else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
2863                || (s->low_delay &&
2864                 ((h->outputed_poc != INT_MIN && out->poc > h->outputed_poc + 2)
2865                  || cur->pict_type == FF_B_TYPE)))
2866             {
2867                 s->low_delay = 0;
2868                 s->avctx->has_b_frames++;
2869             }
2870
2871             if(out_of_order || pics > s->avctx->has_b_frames){
2872                 out->reference &= ~DELAYED_PIC_REF;
2873                 for(i=out_idx; h->delayed_pic[i]; i++)
2874                     h->delayed_pic[i] = h->delayed_pic[i+1];
2875             }
2876             if(!out_of_order && pics > s->avctx->has_b_frames){
2877                 *data_size = sizeof(AVFrame);
2878
2879                 if(out_idx==0 && h->delayed_pic[0] && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset)) {
2880                     h->outputed_poc = INT_MIN;
2881                 } else
2882                     h->outputed_poc = out->poc;
2883                 *pict= *(AVFrame*)out;
2884             }else{
2885                 av_log(avctx, AV_LOG_DEBUG, "no picture\n");
2886             }
2887         }
2888     }
2889
2890     assert(pict->data[0] || !*data_size);
2891     ff_print_debug_info(s, pict);
2892 //printf("out %d\n", (int)pict->data[0]);
2893
2894     return get_consumed_bytes(s, buf_index, buf_size);
2895 }
2896 #if 0
2897 static inline void fill_mb_avail(H264Context *h){
2898     MpegEncContext * const s = &h->s;
2899     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
2900
2901     if(s->mb_y){
2902         h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
2903         h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
2904         h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
2905     }else{
2906         h->mb_avail[0]=
2907         h->mb_avail[1]=
2908         h->mb_avail[2]= 0;
2909     }
2910     h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
2911     h->mb_avail[4]= 1; //FIXME move out
2912     h->mb_avail[5]= 0; //FIXME move out
2913 }
2914 #endif
2915
2916 #ifdef TEST
2917 #undef printf
2918 #undef random
2919 #define COUNT 8000
2920 #define SIZE (COUNT*40)
2921 int main(void){
2922     int i;
2923     uint8_t temp[SIZE];
2924     PutBitContext pb;
2925     GetBitContext gb;
2926 //    int int_temp[10000];
2927     DSPContext dsp;
2928     AVCodecContext avctx;
2929
2930     dsputil_init(&dsp, &avctx);
2931
2932     init_put_bits(&pb, temp, SIZE);
2933     printf("testing unsigned exp golomb\n");
2934     for(i=0; i<COUNT; i++){
2935         START_TIMER
2936         set_ue_golomb(&pb, i);
2937         STOP_TIMER("set_ue_golomb");
2938     }
2939     flush_put_bits(&pb);
2940
2941     init_get_bits(&gb, temp, 8*SIZE);
2942     for(i=0; i<COUNT; i++){
2943         int j, s;
2944
2945         s= show_bits(&gb, 24);
2946
2947         START_TIMER
2948         j= get_ue_golomb(&gb);
2949         if(j != i){
2950             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
2951 //            return -1;
2952         }
2953         STOP_TIMER("get_ue_golomb");
2954     }
2955
2956
2957     init_put_bits(&pb, temp, SIZE);
2958     printf("testing signed exp golomb\n");
2959     for(i=0; i<COUNT; i++){
2960         START_TIMER
2961         set_se_golomb(&pb, i - COUNT/2);
2962         STOP_TIMER("set_se_golomb");
2963     }
2964     flush_put_bits(&pb);
2965
2966     init_get_bits(&gb, temp, 8*SIZE);
2967     for(i=0; i<COUNT; i++){
2968         int j, s;
2969
2970         s= show_bits(&gb, 24);
2971
2972         START_TIMER
2973         j= get_se_golomb(&gb);
2974         if(j != i - COUNT/2){
2975             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
2976 //            return -1;
2977         }
2978         STOP_TIMER("get_se_golomb");
2979     }
2980
2981 #if 0
2982     printf("testing 4x4 (I)DCT\n");
2983
2984     DCTELEM block[16];
2985     uint8_t src[16], ref[16];
2986     uint64_t error= 0, max_error=0;
2987
2988     for(i=0; i<COUNT; i++){
2989         int j;
2990 //        printf("%d %d %d\n", r1, r2, (r2-r1)*16);
2991         for(j=0; j<16; j++){
2992             ref[j]= random()%255;
2993             src[j]= random()%255;
2994         }
2995
2996         h264_diff_dct_c(block, src, ref, 4);
2997
2998         //normalize
2999         for(j=0; j<16; j++){
3000 //            printf("%d ", block[j]);
3001             block[j]= block[j]*4;
3002             if(j&1) block[j]= (block[j]*4 + 2)/5;
3003             if(j&4) block[j]= (block[j]*4 + 2)/5;
3004         }
3005 //        printf("\n");
3006
3007         s->dsp.h264_idct_add(ref, block, 4);
3008 /*        for(j=0; j<16; j++){
3009             printf("%d ", ref[j]);
3010         }
3011         printf("\n");*/
3012
3013         for(j=0; j<16; j++){
3014             int diff= FFABS(src[j] - ref[j]);
3015
3016             error+= diff*diff;
3017             max_error= FFMAX(max_error, diff);
3018         }
3019     }
3020     printf("error=%f max_error=%d\n", ((float)error)/COUNT/16, (int)max_error );
3021     printf("testing quantizer\n");
3022     for(qp=0; qp<52; qp++){
3023         for(i=0; i<16; i++)
3024             src1_block[i]= src2_block[i]= random()%255;
3025
3026     }
3027     printf("Testing NAL layer\n");
3028
3029     uint8_t bitstream[COUNT];
3030     uint8_t nal[COUNT*2];
3031     H264Context h;
3032     memset(&h, 0, sizeof(H264Context));
3033
3034     for(i=0; i<COUNT; i++){
3035         int zeros= i;
3036         int nal_length;
3037         int consumed;
3038         int out_length;
3039         uint8_t *out;
3040         int j;
3041
3042         for(j=0; j<COUNT; j++){
3043             bitstream[j]= (random() % 255) + 1;
3044         }
3045
3046         for(j=0; j<zeros; j++){
3047             int pos= random() % COUNT;
3048             while(bitstream[pos] == 0){
3049                 pos++;
3050                 pos %= COUNT;
3051             }
3052             bitstream[pos]=0;
3053         }
3054
3055         START_TIMER
3056
3057         nal_length= encode_nal(&h, nal, bitstream, COUNT, COUNT*2);
3058         if(nal_length<0){
3059             printf("encoding failed\n");
3060             return -1;
3061         }
3062
3063         out= ff_h264_decode_nal(&h, nal, &out_length, &consumed, nal_length);
3064
3065         STOP_TIMER("NAL")
3066
3067         if(out_length != COUNT){
3068             printf("incorrect length %d %d\n", out_length, COUNT);
3069             return -1;
3070         }
3071
3072         if(consumed != nal_length){
3073             printf("incorrect consumed length %d %d\n", nal_length, consumed);
3074             return -1;
3075         }
3076
3077         if(memcmp(bitstream, out, COUNT)){
3078             printf("mismatch\n");
3079             return -1;
3080         }
3081     }
3082 #endif
3083
3084     printf("Testing RBSP\n");
3085
3086
3087     return 0;
3088 }
3089 #endif /* TEST */
3090
3091
3092 av_cold void ff_h264_free_context(H264Context *h)
3093 {
3094     int i;
3095
3096     free_tables(h); //FIXME cleanup init stuff perhaps
3097
3098     for(i = 0; i < MAX_SPS_COUNT; i++)
3099         av_freep(h->sps_buffers + i);
3100
3101     for(i = 0; i < MAX_PPS_COUNT; i++)
3102         av_freep(h->pps_buffers + i);
3103 }
3104
3105 av_cold int ff_h264_decode_end(AVCodecContext *avctx)
3106 {
3107     H264Context *h = avctx->priv_data;
3108     MpegEncContext *s = &h->s;
3109
3110     ff_h264_free_context(h);
3111
3112     MPV_common_end(s);
3113
3114 //    memset(h, 0, sizeof(H264Context));
3115
3116     return 0;
3117 }
3118
3119
3120 AVCodec h264_decoder = {
3121     "h264",
3122     CODEC_TYPE_VIDEO,
3123     CODEC_ID_H264,
3124     sizeof(H264Context),
3125     ff_h264_decode_init,
3126     NULL,
3127     ff_h264_decode_end,
3128     decode_frame,
3129     /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY,
3130     .flush= flush_dpb,
3131     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
3132     .pix_fmts= ff_hwaccel_pixfmt_list_420,
3133 };
3134
3135 #if CONFIG_H264_VDPAU_DECODER
3136 AVCodec h264_vdpau_decoder = {
3137     "h264_vdpau",
3138     CODEC_TYPE_VIDEO,
3139     CODEC_ID_H264,
3140     sizeof(H264Context),
3141     ff_h264_decode_init,
3142     NULL,
3143     ff_h264_decode_end,
3144     decode_frame,
3145     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
3146     .flush= flush_dpb,
3147     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
3148     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
3149 };
3150 #endif