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   1 /*
   2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
   3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of 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
  24  * H.264 / AVC / MPEG4 part10 codec.
  25  * @author Michael Niedermayer <michaelni@gmx.at>
  26  */
  27
  28 #include "libavutil/imgutils.h"
  29 #include "libavutil/opt.h"
  30 #include "internal.h"
  31 #include "dsputil.h"
  32 #include "avcodec.h"
  33 #include "mpegvideo.h"
  34 #include "h264.h"
  35 #include "h264data.h"
  36 #include "h264_mvpred.h"
  37 #include "golomb.h"
  38 #include "mathops.h"
  39 #include "rectangle.h"
  40 #include "thread.h"
  41 #include "vdpau_internal.h"
  42 #include "libavutil/avassert.h"
  43
  44 #include "cabac.h"
  45
  46 //#undef NDEBUG
  47 #include <assert.h>
  48
  49 static const uint8_t rem6[QP_MAX_NUM+1]={
  50 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, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
  51 };
  52
  53 static const uint8_t div6[QP_MAX_NUM+1]={
  54 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, 8, 8, 9, 9, 9, 9, 9, 9,10,10,10,10,
  55 };
  56
  57 static const enum PixelFormat hwaccel_pixfmt_list_h264_jpeg_420[] = {
  58     PIX_FMT_DXVA2_VLD,
  59     PIX_FMT_VAAPI_VLD,
  60     PIX_FMT_VDA_VLD,
  61     PIX_FMT_YUVJ420P,
  62     PIX_FMT_NONE
  63 };
  64
  65 /**
  66  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
  67  */
  68 int ff_h264_check_intra4x4_pred_mode(H264Context *h){
  69     MpegEncContext * const s = &h->s;
  70     static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
  71     static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
  72     int i;
  73
  74     if(!(h->top_samples_available&0x8000)){
  75         for(i=0; i<4; i++){
  76             int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
  77             if(status<0){
  78                 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);
  79                 return -1;
  80             } else if(status){
  81                 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
  82             }
  83         }
  84     }
  85
  86     if((h->left_samples_available&0x8888)!=0x8888){
  87         static const int mask[4]={0x8000,0x2000,0x80,0x20};
  88         for(i=0; i<4; i++){
  89             if(!(h->left_samples_available&mask[i])){
  90                 int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
  91                 if(status<0){
  92                     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);
  93                     return -1;
  94                 } else if(status){
  95                     h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
  96                 }
  97             }
  98         }
  99     }
 100
 101     return 0;
 102 } //FIXME cleanup like check_intra_pred_mode
 103
 104 static int check_intra_pred_mode(H264Context *h, int mode, int is_chroma){
 105     MpegEncContext * const s = &h->s;
 106     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
 107     static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
 108
 109     if(mode > 6U) {
 110         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);
 111         return -1;
 112     }
 113
 114     if(!(h->top_samples_available&0x8000)){
 115         mode= top[ mode ];
 116         if(mode<0){
 117             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);
 118             return -1;
 119         }
 120     }
 121
 122     if((h->left_samples_available&0x8080) != 0x8080){
 123         mode= left[ mode ];
 124         if(is_chroma && (h->left_samples_available&0x8080)){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
 125             mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
 126         }
 127         if(mode<0){
 128             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);
 129             return -1;
 130         }
 131     }
 132
 133     return mode;
 134 }
 135
 136 /**
 137  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 138  */
 139 int ff_h264_check_intra16x16_pred_mode(H264Context *h, int mode)
 140 {
 141     return check_intra_pred_mode(h, mode, 0);
 142 }
 143
 144 /**
 145  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 146  */
 147 int ff_h264_check_intra_chroma_pred_mode(H264Context *h, int mode)
 148 {
 149     return check_intra_pred_mode(h, mode, 1);
 150 }
 151
 152
 153 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
 154     int i, si, di;
 155     uint8_t *dst;
 156     int bufidx;
 157
 158 //    src[0]&0x80;                //forbidden bit
 159     h->nal_ref_idc= src[0]>>5;
 160     h->nal_unit_type= src[0]&0x1F;
 161
 162     src++; length--;
 163
 164 #if HAVE_FAST_UNALIGNED
 165 # if HAVE_FAST_64BIT
 166 #   define RS 7
 167     for(i=0; i+1<length; i+=9){
 168         if(!((~AV_RN64A(src+i) & (AV_RN64A(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
 169 # else
 170 #   define RS 3
 171     for(i=0; i+1<length; i+=5){
 172         if(!((~AV_RN32A(src+i) & (AV_RN32A(src+i) - 0x01000101U)) & 0x80008080U))
 173 # endif
 174             continue;
 175         if(i>0 && !src[i]) i--;
 176         while(src[i]) i++;
 177 #else
 178 #   define RS 0
 179     for(i=0; i+1<length; i+=2){
 180         if(src[i]) continue;
 181         if(i>0 && src[i-1]==0) i--;
 182 #endif
 183         if(i+2<length && src[i+1]==0 && src[i+2]<=3){
 184             if(src[i+2]!=3){
 185                 /* startcode, so we must be past the end */
 186                 length=i;
 187             }
 188             break;
 189         }
 190         i-= RS;
 191     }
 192
 193     bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
 194     si=h->rbsp_buffer_size[bufidx];
 195     av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE+MAX_MBPAIR_SIZE);
 196     dst= h->rbsp_buffer[bufidx];
 197     if(si != h->rbsp_buffer_size[bufidx])
 198         memset(dst + length, 0, FF_INPUT_BUFFER_PADDING_SIZE+MAX_MBPAIR_SIZE);
 199
 200     if (dst == NULL){
 201         return NULL;
 202     }
 203
 204     if(i>=length-1){ //no escaped 0
 205         *dst_length= length;
 206         *consumed= length+1; //+1 for the header
 207         if(h->s.avctx->flags2 & CODEC_FLAG2_FAST){
 208             return src;
 209         }else{
 210             memcpy(dst, src, length);
 211             return dst;
 212         }
 213     }
 214
 215 //printf("decoding esc\n");
 216     memcpy(dst, src, i);
 217     si=di=i;
 218     while(si+2<length){
 219         //remove escapes (very rare 1:2^22)
 220         if(src[si+2]>3){
 221             dst[di++]= src[si++];
 222             dst[di++]= src[si++];
 223         }else if(src[si]==0 && src[si+1]==0){
 224             if(src[si+2]==3){ //escape
 225                 dst[di++]= 0;
 226                 dst[di++]= 0;
 227                 si+=3;
 228                 continue;
 229             }else //next start code
 230                 goto nsc;
 231         }
 232
 233         dst[di++]= src[si++];
 234     }
 235     while(si<length)
 236         dst[di++]= src[si++];
 237 nsc:
 238
 239     memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
 240
 241     *dst_length= di;
 242     *consumed= si + 1;//+1 for the header
 243 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
 244     return dst;
 245 }
 246
 247 /**
 248  * Identify the exact end of the bitstream
 249  * @return the length of the trailing, or 0 if damaged
 250  */
 251 static int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
 252     int v= *src;
 253     int r;
 254
 255     tprintf(h->s.avctx, "rbsp trailing %X\n", v);
 256
 257     for(r=1; r<9; r++){
 258         if(v&1) return r;
 259         v>>=1;
 260     }
 261     return 0;
 262 }
 263
 264 static inline int get_lowest_part_list_y(H264Context *h, Picture *pic, int n, int height,
 265                                  int y_offset, int list){
 266     int raw_my= h->mv_cache[list][ scan8[n] ][1];
 267     int filter_height= (raw_my&3) ? 2 : 0;
 268     int full_my= (raw_my>>2) + y_offset;
 269     int top = full_my - filter_height, bottom = full_my + height + filter_height;
 270
 271     return FFMAX(abs(top), bottom);
 272 }
 273
 274 static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n, int height,
 275                                int y_offset, int list0, int list1, int *nrefs){
 276     MpegEncContext * const s = &h->s;
 277     int my;
 278
 279     y_offset += 16*(s->mb_y >> MB_FIELD);
 280
 281     if(list0){
 282         int ref_n = h->ref_cache[0][ scan8[n] ];
 283         Picture *ref= &h->ref_list[0][ref_n];
 284
 285         // Error resilience puts the current picture in the ref list.
 286         // Don't try to wait on these as it will cause a deadlock.
 287         // Fields can wait on each other, though.
 288         if (ref->f.thread_opaque != s->current_picture.f.thread_opaque ||
 289            (ref->f.reference & 3) != s->picture_structure) {
 290             my = get_lowest_part_list_y(h, ref, n, height, y_offset, 0);
 291             if (refs[0][ref_n] < 0) nrefs[0] += 1;
 292             refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
 293         }
 294     }
 295
 296     if(list1){
 297         int ref_n = h->ref_cache[1][ scan8[n] ];
 298         Picture *ref= &h->ref_list[1][ref_n];
 299
 300         if (ref->f.thread_opaque != s->current_picture.f.thread_opaque ||
 301            (ref->f.reference & 3) != s->picture_structure) {
 302             my = get_lowest_part_list_y(h, ref, n, height, y_offset, 1);
 303             if (refs[1][ref_n] < 0) nrefs[1] += 1;
 304             refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
 305         }
 306     }
 307 }
 308
 309 /**
 310  * Wait until all reference frames are available for MC operations.
 311  *
 312  * @param h the H264 context
 313  */
 314 static void await_references(H264Context *h){
 315     MpegEncContext * const s = &h->s;
 316     const int mb_xy= h->mb_xy;
 317     const int mb_type = s->current_picture.f.mb_type[mb_xy];
 318     int refs[2][48];
 319     int nrefs[2] = {0};
 320     int ref, list;
 321
 322     memset(refs, -1, sizeof(refs));
 323
 324     if(IS_16X16(mb_type)){
 325         get_lowest_part_y(h, refs, 0, 16, 0,
 326                   IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
 327     }else if(IS_16X8(mb_type)){
 328         get_lowest_part_y(h, refs, 0, 8, 0,
 329                   IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
 330         get_lowest_part_y(h, refs, 8, 8, 8,
 331                   IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
 332     }else if(IS_8X16(mb_type)){
 333         get_lowest_part_y(h, refs, 0, 16, 0,
 334                   IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
 335         get_lowest_part_y(h, refs, 4, 16, 0,
 336                   IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
 337     }else{
 338         int i;
 339
 340         assert(IS_8X8(mb_type));
 341
 342         for(i=0; i<4; i++){
 343             const int sub_mb_type= h->sub_mb_type[i];
 344             const int n= 4*i;
 345             int y_offset= (i&2)<<2;
 346
 347             if(IS_SUB_8X8(sub_mb_type)){
 348                 get_lowest_part_y(h, refs, n  , 8, y_offset,
 349                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 350             }else if(IS_SUB_8X4(sub_mb_type)){
 351                 get_lowest_part_y(h, refs, n  , 4, y_offset,
 352                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 353                 get_lowest_part_y(h, refs, n+2, 4, y_offset+4,
 354                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 355             }else if(IS_SUB_4X8(sub_mb_type)){
 356                 get_lowest_part_y(h, refs, n  , 8, y_offset,
 357                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 358                 get_lowest_part_y(h, refs, n+1, 8, y_offset,
 359                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 360             }else{
 361                 int j;
 362                 assert(IS_SUB_4X4(sub_mb_type));
 363                 for(j=0; j<4; j++){
 364                     int sub_y_offset= y_offset + 2*(j&2);
 365                     get_lowest_part_y(h, refs, n+j, 4, sub_y_offset,
 366                               IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 367                 }
 368             }
 369         }
 370     }
 371
 372     for(list=h->list_count-1; list>=0; list--){
 373         for(ref=0; ref<48 && nrefs[list]; ref++){
 374             int row = refs[list][ref];
 375             if(row >= 0){
 376                 Picture *ref_pic = &h->ref_list[list][ref];
 377                 int ref_field = ref_pic->f.reference - 1;
 378                 int ref_field_picture = ref_pic->field_picture;
 379                 int pic_height = 16*s->mb_height >> ref_field_picture;
 380
 381                 row <<= MB_MBAFF;
 382                 nrefs[list]--;
 383
 384                 if(!FIELD_PICTURE && ref_field_picture){ // frame referencing two fields
 385                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN((row >> 1) - !(row&1), pic_height-1), 1);
 386                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN((row >> 1)           , pic_height-1), 0);
 387                 }else if(FIELD_PICTURE && !ref_field_picture){ // field referencing one field of a frame
 388                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row*2 + ref_field    , pic_height-1), 0);
 389                 }else if(FIELD_PICTURE){
 390                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row, pic_height-1), ref_field);
 391                 }else{
 392                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row, pic_height-1), 0);
 393                 }
 394             }
 395         }
 396     }
 397 }
 398
 399 #if 0
 400 /**
 401  * DCT transforms the 16 dc values.
 402  * @param qp quantization parameter ??? FIXME
 403  */
 404 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
 405 //    const int qmul= dequant_coeff[qp][0];
 406     int i;
 407     int temp[16]; //FIXME check if this is a good idea
 408     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
 409     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
 410
 411     for(i=0; i<4; i++){
 412         const int offset= y_offset[i];
 413         const int z0= block[offset+stride*0] + block[offset+stride*4];
 414         const int z1= block[offset+stride*0] - block[offset+stride*4];
 415         const int z2= block[offset+stride*1] - block[offset+stride*5];
 416         const int z3= block[offset+stride*1] + block[offset+stride*5];
 417
 418         temp[4*i+0]= z0+z3;
 419         temp[4*i+1]= z1+z2;
 420         temp[4*i+2]= z1-z2;
 421         temp[4*i+3]= z0-z3;
 422     }
 423
 424     for(i=0; i<4; i++){
 425         const int offset= x_offset[i];
 426         const int z0= temp[4*0+i] + temp[4*2+i];
 427         const int z1= temp[4*0+i] - temp[4*2+i];
 428         const int z2= temp[4*1+i] - temp[4*3+i];
 429         const int z3= temp[4*1+i] + temp[4*3+i];
 430
 431         block[stride*0 +offset]= (z0 + z3)>>1;
 432         block[stride*2 +offset]= (z1 + z2)>>1;
 433         block[stride*8 +offset]= (z1 - z2)>>1;
 434         block[stride*10+offset]= (z0 - z3)>>1;
 435     }
 436 }
 437 #endif
 438
 439 #undef xStride
 440 #undef stride
 441
 442 #if 0
 443 static void chroma_dc_dct_c(DCTELEM *block){
 444     const int stride= 16*2;
 445     const int xStride= 16;
 446     int a,b,c,d,e;
 447
 448     a= block[stride*0 + xStride*0];
 449     b= block[stride*0 + xStride*1];
 450     c= block[stride*1 + xStride*0];
 451     d= block[stride*1 + xStride*1];
 452
 453     e= a-b;
 454     a= a+b;
 455     b= c-d;
 456     c= c+d;
 457
 458     block[stride*0 + xStride*0]= (a+c);
 459     block[stride*0 + xStride*1]= (e+b);
 460     block[stride*1 + xStride*0]= (a-c);
 461     block[stride*1 + xStride*1]= (e-b);
 462 }
 463 #endif
 464
 465 static av_always_inline void
 466 mc_dir_part(H264Context *h, Picture *pic, int n, int square,
 467             int height, int delta, int list,
 468             uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 469             int src_x_offset, int src_y_offset,
 470             qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op,
 471             int pixel_shift, int chroma_idc)
 472 {
 473     MpegEncContext * const s = &h->s;
 474     const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
 475     int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
 476     const int luma_xy= (mx&3) + ((my&3)<<2);
 477     int offset = ((mx>>2) << pixel_shift) + (my>>2)*h->mb_linesize;
 478     uint8_t * src_y = pic->f.data[0] + offset;
 479     uint8_t * src_cb, * src_cr;
 480     int extra_width= h->emu_edge_width;
 481     int extra_height= h->emu_edge_height;
 482     int emu=0;
 483     const int full_mx= mx>>2;
 484     const int full_my= my>>2;
 485     const int pic_width  = 16*s->mb_width;
 486     const int pic_height = 16*s->mb_height >> MB_FIELD;
 487     int ysh;
 488
 489     if(mx&7) extra_width -= 3;
 490     if(my&7) extra_height -= 3;
 491
 492     if(   full_mx < 0-extra_width
 493        || full_my < 0-extra_height
 494        || full_mx + 16/*FIXME*/ > pic_width + extra_width
 495        || full_my + 16/*FIXME*/ > pic_height + extra_height){
 496         s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_y - (2 << pixel_shift) - 2*h->mb_linesize, h->mb_linesize,
 497                                 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
 498             src_y= s->edge_emu_buffer + (2 << pixel_shift) + 2*h->mb_linesize;
 499         emu=1;
 500     }
 501
 502     qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
 503     if(!square){
 504         qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
 505     }
 506
 507     if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
 508
 509     if(chroma_idc == 3 /* yuv444 */){
 510         src_cb = pic->f.data[1] + offset;
 511         if(emu){
 512             s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cb - (2 << pixel_shift) - 2*h->mb_linesize, h->mb_linesize,
 513                                     16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
 514             src_cb= s->edge_emu_buffer + (2 << pixel_shift) + 2*h->mb_linesize;
 515         }
 516         qpix_op[luma_xy](dest_cb, src_cb, h->mb_linesize); //FIXME try variable height perhaps?
 517         if(!square){
 518             qpix_op[luma_xy](dest_cb + delta, src_cb + delta, h->mb_linesize);
 519         }
 520
 521         src_cr = pic->f.data[2] + offset;
 522         if(emu){
 523             s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cr - (2 << pixel_shift) - 2*h->mb_linesize, h->mb_linesize,
 524                                     16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
 525             src_cr= s->edge_emu_buffer + (2 << pixel_shift) + 2*h->mb_linesize;
 526         }
 527         qpix_op[luma_xy](dest_cr, src_cr, h->mb_linesize); //FIXME try variable height perhaps?
 528         if(!square){
 529             qpix_op[luma_xy](dest_cr + delta, src_cr + delta, h->mb_linesize);
 530         }
 531         return;
 532     }
 533
 534     ysh = 3 - (chroma_idc == 2 /* yuv422 */);
 535     if(chroma_idc == 1 /* yuv420 */ && MB_FIELD){
 536         // chroma offset when predicting from a field of opposite parity
 537         my += 2 * ((s->mb_y & 1) - (pic->f.reference - 1));
 538         emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
 539     }
 540
 541     src_cb = pic->f.data[1] + ((mx >> 3) << pixel_shift) + (my >> ysh) * h->mb_uvlinesize;
 542     src_cr = pic->f.data[2] + ((mx >> 3) << pixel_shift) + (my >> ysh) * h->mb_uvlinesize;
 543
 544     if(emu){
 545         s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cb, h->mb_uvlinesize,
 546                                 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
 547                                 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
 548             src_cb= s->edge_emu_buffer;
 549     }
 550     chroma_op(dest_cb, src_cb, h->mb_uvlinesize, height >> (chroma_idc == 1 /* yuv420 */),
 551               mx&7, (my << (chroma_idc == 2 /* yuv422 */)) &7);
 552
 553     if(emu){
 554         s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cr, h->mb_uvlinesize,
 555                                 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
 556                                 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
 557             src_cr= s->edge_emu_buffer;
 558     }
 559     chroma_op(dest_cr, src_cr, h->mb_uvlinesize, height >> (chroma_idc == 1 /* yuv420 */),
 560               mx&7, (my << (chroma_idc == 2 /* yuv422 */)) &7);
 561 }
 562
 563 static av_always_inline void
 564 mc_part_std(H264Context *h, int n, int square, int height, int delta,
 565             uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 566             int x_offset, int y_offset,
 567             qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 568             qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 569             int list0, int list1, int pixel_shift, int chroma_idc)
 570 {
 571     MpegEncContext * const s = &h->s;
 572     qpel_mc_func *qpix_op=  qpix_put;
 573     h264_chroma_mc_func chroma_op= chroma_put;
 574
 575     dest_y  += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 576     if (chroma_idc == 3 /* yuv444 */) {
 577         dest_cb += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 578         dest_cr += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 579     } else if (chroma_idc == 2 /* yuv422 */) {
 580         dest_cb += (  x_offset << pixel_shift) + 2*y_offset*h->mb_uvlinesize;
 581         dest_cr += (  x_offset << pixel_shift) + 2*y_offset*h->mb_uvlinesize;
 582     } else /* yuv420 */ {
 583         dest_cb += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 584         dest_cr += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 585     }
 586     x_offset += 8*s->mb_x;
 587     y_offset += 8*(s->mb_y >> MB_FIELD);
 588
 589     if(list0){
 590         Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
 591         mc_dir_part(h, ref, n, square, height, delta, 0,
 592                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 593                            qpix_op, chroma_op, pixel_shift, chroma_idc);
 594
 595         qpix_op=  qpix_avg;
 596         chroma_op= chroma_avg;
 597     }
 598
 599     if(list1){
 600         Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
 601         mc_dir_part(h, ref, n, square, height, delta, 1,
 602                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 603                            qpix_op, chroma_op, pixel_shift, chroma_idc);
 604     }
 605 }
 606
 607 static av_always_inline void
 608 mc_part_weighted(H264Context *h, int n, int square, int height, int delta,
 609                  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 610                  int x_offset, int y_offset,
 611                  qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 612                  h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
 613                  h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
 614                  int list0, int list1, int pixel_shift, int chroma_idc){
 615     MpegEncContext * const s = &h->s;
 616     int chroma_height;
 617
 618     dest_y += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 619     if (chroma_idc == 3 /* yuv444 */) {
 620         chroma_height = height;
 621         chroma_weight_avg = luma_weight_avg;
 622         chroma_weight_op = luma_weight_op;
 623         dest_cb += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 624         dest_cr += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 625     } else if (chroma_idc == 2 /* yuv422 */) {
 626         chroma_height = height;
 627         dest_cb += (  x_offset << pixel_shift) + 2*y_offset*h->mb_uvlinesize;
 628         dest_cr += (  x_offset << pixel_shift) + 2*y_offset*h->mb_uvlinesize;
 629     } else /* yuv420 */ {
 630         chroma_height = height >> 1;
 631         dest_cb += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 632         dest_cr += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 633     }
 634     x_offset += 8*s->mb_x;
 635     y_offset += 8*(s->mb_y >> MB_FIELD);
 636
 637     if(list0 && list1){
 638         /* don't optimize for luma-only case, since B-frames usually
 639          * use implicit weights => chroma too. */
 640         uint8_t *tmp_cb = s->obmc_scratchpad;
 641         uint8_t *tmp_cr = s->obmc_scratchpad + (16 << pixel_shift);
 642         uint8_t *tmp_y  = s->obmc_scratchpad + 16*h->mb_uvlinesize;
 643         int refn0 = h->ref_cache[0][ scan8[n] ];
 644         int refn1 = h->ref_cache[1][ scan8[n] ];
 645
 646         mc_dir_part(h, &h->ref_list[0][refn0], n, square, height, delta, 0,
 647                     dest_y, dest_cb, dest_cr,
 648                     x_offset, y_offset, qpix_put, chroma_put,
 649                     pixel_shift, chroma_idc);
 650         mc_dir_part(h, &h->ref_list[1][refn1], n, square, height, delta, 1,
 651                     tmp_y, tmp_cb, tmp_cr,
 652                     x_offset, y_offset, qpix_put, chroma_put,
 653                     pixel_shift, chroma_idc);
 654
 655         if(h->use_weight == 2){
 656             int weight0 = h->implicit_weight[refn0][refn1][s->mb_y&1];
 657             int weight1 = 64 - weight0;
 658             luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize,
 659                               height,        5, weight0, weight1, 0);
 660             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize,
 661                               chroma_height, 5, weight0, weight1, 0);
 662             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize,
 663                               chroma_height, 5, weight0, weight1, 0);
 664         }else{
 665             luma_weight_avg(dest_y, tmp_y, h->mb_linesize, height, h->luma_log2_weight_denom,
 666                             h->luma_weight[refn0][0][0] , h->luma_weight[refn1][1][0],
 667                             h->luma_weight[refn0][0][1] + h->luma_weight[refn1][1][1]);
 668             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, chroma_height, h->chroma_log2_weight_denom,
 669                             h->chroma_weight[refn0][0][0][0] , h->chroma_weight[refn1][1][0][0],
 670                             h->chroma_weight[refn0][0][0][1] + h->chroma_weight[refn1][1][0][1]);
 671             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, chroma_height, h->chroma_log2_weight_denom,
 672                             h->chroma_weight[refn0][0][1][0] , h->chroma_weight[refn1][1][1][0],
 673                             h->chroma_weight[refn0][0][1][1] + h->chroma_weight[refn1][1][1][1]);
 674         }
 675     }else{
 676         int list = list1 ? 1 : 0;
 677         int refn = h->ref_cache[list][ scan8[n] ];
 678         Picture *ref= &h->ref_list[list][refn];
 679         mc_dir_part(h, ref, n, square, height, delta, list,
 680                     dest_y, dest_cb, dest_cr, x_offset, y_offset,
 681                     qpix_put, chroma_put, pixel_shift, chroma_idc);
 682
 683         luma_weight_op(dest_y, h->mb_linesize, height, h->luma_log2_weight_denom,
 684                        h->luma_weight[refn][list][0], h->luma_weight[refn][list][1]);
 685         if(h->use_weight_chroma){
 686             chroma_weight_op(dest_cb, h->mb_uvlinesize, chroma_height, h->chroma_log2_weight_denom,
 687                              h->chroma_weight[refn][list][0][0], h->chroma_weight[refn][list][0][1]);
 688             chroma_weight_op(dest_cr, h->mb_uvlinesize, chroma_height, h->chroma_log2_weight_denom,
 689                              h->chroma_weight[refn][list][1][0], h->chroma_weight[refn][list][1][1]);
 690         }
 691     }
 692 }
 693
 694 static av_always_inline void
 695 mc_part(H264Context *h, int n, int square, int height, int delta,
 696         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 697         int x_offset, int y_offset,
 698         qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 699         qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 700         h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 701         int list0, int list1, int pixel_shift, int chroma_idc)
 702 {
 703     if((h->use_weight==2 && list0 && list1
 704         && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ][h->s.mb_y&1] != 32))
 705        || h->use_weight==1)
 706         mc_part_weighted(h, n, square, height, delta, dest_y, dest_cb, dest_cr,
 707                          x_offset, y_offset, qpix_put, chroma_put,
 708                          weight_op[0], weight_op[1], weight_avg[0],
 709                          weight_avg[1], list0, list1, pixel_shift, chroma_idc);
 710     else
 711         mc_part_std(h, n, square, height, delta, dest_y, dest_cb, dest_cr,
 712                     x_offset, y_offset, qpix_put, chroma_put, qpix_avg,
 713                     chroma_avg, list0, list1, pixel_shift, chroma_idc);
 714 }
 715
 716 static av_always_inline void
 717 prefetch_motion(H264Context *h, int list, int pixel_shift, int chroma_idc)
 718 {
 719     /* fetch pixels for estimated mv 4 macroblocks ahead
 720      * optimized for 64byte cache lines */
 721     MpegEncContext * const s = &h->s;
 722     const int refn = h->ref_cache[list][scan8[0]];
 723     if(refn >= 0){
 724         const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
 725         const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
 726         uint8_t **src = h->ref_list[list][refn].f.data;
 727         int off= (mx << pixel_shift) + (my + (s->mb_x&3)*4)*h->mb_linesize + (64 << pixel_shift);
 728         s->dsp.prefetch(src[0]+off, s->linesize, 4);
 729         if (chroma_idc == 3 /* yuv444 */) {
 730             s->dsp.prefetch(src[1]+off, s->linesize, 4);
 731             s->dsp.prefetch(src[2]+off, s->linesize, 4);
 732         }else{
 733             off= (((mx>>1)+64)<<pixel_shift) + ((my>>1) + (s->mb_x&7))*s->uvlinesize;
 734             s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
 735         }
 736     }
 737 }
 738
 739 static av_always_inline void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 740                       qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
 741                       qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
 742                       h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 743                       int pixel_shift, int chroma_idc)
 744 {
 745     MpegEncContext * const s = &h->s;
 746     const int mb_xy= h->mb_xy;
 747     const int mb_type = s->current_picture.f.mb_type[mb_xy];
 748
 749     assert(IS_INTER(mb_type));
 750
 751     if(HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
 752         await_references(h);
 753     prefetch_motion(h, 0, pixel_shift, chroma_idc);
 754
 755     if(IS_16X16(mb_type)){
 756         mc_part(h, 0, 1, 16, 0, dest_y, dest_cb, dest_cr, 0, 0,
 757                 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
 758                 weight_op, weight_avg,
 759                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1),
 760                 pixel_shift, chroma_idc);
 761     }else if(IS_16X8(mb_type)){
 762         mc_part(h, 0, 0, 8, 8 << pixel_shift, dest_y, dest_cb, dest_cr, 0, 0,
 763                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 764                 weight_op, weight_avg,
 765                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1),
 766                 pixel_shift, chroma_idc);
 767         mc_part(h, 8, 0, 8, 8 << pixel_shift, dest_y, dest_cb, dest_cr, 0, 4,
 768                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 769                 weight_op, weight_avg,
 770                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1),
 771                 pixel_shift, chroma_idc);
 772     }else if(IS_8X16(mb_type)){
 773         mc_part(h, 0, 0, 16, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
 774                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 775                 &weight_op[1], &weight_avg[1],
 776                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1),
 777                 pixel_shift, chroma_idc);
 778         mc_part(h, 4, 0, 16, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
 779                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 780                 &weight_op[1], &weight_avg[1],
 781                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1),
 782                 pixel_shift, chroma_idc);
 783     }else{
 784         int i;
 785
 786         assert(IS_8X8(mb_type));
 787
 788         for(i=0; i<4; i++){
 789             const int sub_mb_type= h->sub_mb_type[i];
 790             const int n= 4*i;
 791             int x_offset= (i&1)<<2;
 792             int y_offset= (i&2)<<1;
 793
 794             if(IS_SUB_8X8(sub_mb_type)){
 795                 mc_part(h, n, 1, 8, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 796                     qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 797                     &weight_op[1], &weight_avg[1],
 798                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 799                     pixel_shift, chroma_idc);
 800             }else if(IS_SUB_8X4(sub_mb_type)){
 801                 mc_part(h, n  , 0, 4, 4 << pixel_shift, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 802                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 803                     &weight_op[1], &weight_avg[1],
 804                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 805                     pixel_shift, chroma_idc);
 806                 mc_part(h, n+2, 0, 4, 4 << pixel_shift, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
 807                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 808                     &weight_op[1], &weight_avg[1],
 809                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 810                     pixel_shift, chroma_idc);
 811             }else if(IS_SUB_4X8(sub_mb_type)){
 812                 mc_part(h, n  , 0, 8, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 813                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 814                     &weight_op[2], &weight_avg[2],
 815                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 816                     pixel_shift, chroma_idc);
 817                 mc_part(h, n+1, 0, 8, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
 818                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 819                     &weight_op[2], &weight_avg[2],
 820                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 821                     pixel_shift, chroma_idc);
 822             }else{
 823                 int j;
 824                 assert(IS_SUB_4X4(sub_mb_type));
 825                 for(j=0; j<4; j++){
 826                     int sub_x_offset= x_offset + 2*(j&1);
 827                     int sub_y_offset= y_offset +   (j&2);
 828                     mc_part(h, n+j, 1, 4, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
 829                         qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 830                         &weight_op[2], &weight_avg[2],
 831                         IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 832                         pixel_shift, chroma_idc);
 833                 }
 834             }
 835         }
 836     }
 837
 838     prefetch_motion(h, 1, pixel_shift, chroma_idc);
 839 }
 840
 841 static av_always_inline void
 842 hl_motion_420(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 843               qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
 844               qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
 845               h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 846               int pixel_shift)
 847 {
 848     hl_motion(h, dest_y, dest_cb, dest_cr, qpix_put, chroma_put,
 849               qpix_avg, chroma_avg, weight_op, weight_avg, pixel_shift, 1);
 850 }
 851
 852 static av_always_inline void
 853 hl_motion_422(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 854               qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
 855               qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
 856               h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 857               int pixel_shift)
 858 {
 859     hl_motion(h, dest_y, dest_cb, dest_cr, qpix_put, chroma_put,
 860               qpix_avg, chroma_avg, weight_op, weight_avg, pixel_shift, 2);
 861 }
 862
 863 static void free_tables(H264Context *h, int free_rbsp){
 864     int i;
 865     H264Context *hx;
 866
 867     av_freep(&h->intra4x4_pred_mode);
 868     av_freep(&h->chroma_pred_mode_table);
 869     av_freep(&h->cbp_table);
 870     av_freep(&h->mvd_table[0]);
 871     av_freep(&h->mvd_table[1]);
 872     av_freep(&h->direct_table);
 873     av_freep(&h->non_zero_count);
 874     av_freep(&h->slice_table_base);
 875     h->slice_table= NULL;
 876     av_freep(&h->list_counts);
 877
 878     av_freep(&h->mb2b_xy);
 879     av_freep(&h->mb2br_xy);
 880
 881     for(i = 0; i < MAX_THREADS; i++) {
 882         hx = h->thread_context[i];
 883         if(!hx) continue;
 884         av_freep(&hx->top_borders[1]);
 885         av_freep(&hx->top_borders[0]);
 886         av_freep(&hx->s.obmc_scratchpad);
 887         if (free_rbsp){
 888             av_freep(&hx->rbsp_buffer[1]);
 889             av_freep(&hx->rbsp_buffer[0]);
 890             hx->rbsp_buffer_size[0] = 0;
 891             hx->rbsp_buffer_size[1] = 0;
 892         }
 893         if (i) av_freep(&h->thread_context[i]);
 894     }
 895 }
 896
 897 static void init_dequant8_coeff_table(H264Context *h){
 898     int i,j,q,x;
 899     const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
 900
 901     for(i=0; i<6; i++ ){
 902         h->dequant8_coeff[i] = h->dequant8_buffer[i];
 903         for(j=0; j<i; j++){
 904             if(!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i], 64*sizeof(uint8_t))){
 905                 h->dequant8_coeff[i] = h->dequant8_buffer[j];
 906                 break;
 907             }
 908         }
 909         if(j<i)
 910             continue;
 911
 912         for(q=0; q<max_qp+1; q++){
 913             int shift = div6[q];
 914             int idx = rem6[q];
 915             for(x=0; x<64; x++)
 916                 h->dequant8_coeff[i][q][(x>>3)|((x&7)<<3)] =
 917                     ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
 918                     h->pps.scaling_matrix8[i][x]) << shift;
 919         }
 920     }
 921 }
 922
 923 static void init_dequant4_coeff_table(H264Context *h){
 924     int i,j,q,x;
 925     const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
 926     for(i=0; i<6; i++ ){
 927         h->dequant4_coeff[i] = h->dequant4_buffer[i];
 928         for(j=0; j<i; j++){
 929             if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
 930                 h->dequant4_coeff[i] = h->dequant4_buffer[j];
 931                 break;
 932             }
 933         }
 934         if(j<i)
 935             continue;
 936
 937         for(q=0; q<max_qp+1; q++){
 938             int shift = div6[q] + 2;
 939             int idx = rem6[q];
 940             for(x=0; x<16; x++)
 941                 h->dequant4_coeff[i][q][(x>>2)|((x<<2)&0xF)] =
 942                     ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
 943                     h->pps.scaling_matrix4[i][x]) << shift;
 944         }
 945     }
 946 }
 947
 948 static void init_dequant_tables(H264Context *h){
 949     int i,x;
 950     init_dequant4_coeff_table(h);
 951     if(h->pps.transform_8x8_mode)
 952         init_dequant8_coeff_table(h);
 953     if(h->sps.transform_bypass){
 954         for(i=0; i<6; i++)
 955             for(x=0; x<16; x++)
 956                 h->dequant4_coeff[i][0][x] = 1<<6;
 957         if(h->pps.transform_8x8_mode)
 958             for(i=0; i<6; i++)
 959                 for(x=0; x<64; x++)
 960                     h->dequant8_coeff[i][0][x] = 1<<6;
 961     }
 962 }
 963
 964
 965 int ff_h264_alloc_tables(H264Context *h){
 966     MpegEncContext * const s = &h->s;
 967     const int big_mb_num= s->mb_stride * (s->mb_height+1);
 968     const int row_mb_num= 2*s->mb_stride*s->avctx->thread_count;
 969     int x,y;
 970
 971     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, row_mb_num * 8  * sizeof(uint8_t), fail)
 972
 973     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 48 * sizeof(uint8_t), fail)
 974     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
 975     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
 976
 977     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
 978     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*row_mb_num * sizeof(uint8_t), fail);
 979     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*row_mb_num * sizeof(uint8_t), fail);
 980     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 4*big_mb_num * sizeof(uint8_t) , fail);
 981     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
 982
 983     memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
 984     h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
 985
 986     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
 987     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
 988     for(y=0; y<s->mb_height; y++){
 989         for(x=0; x<s->mb_width; x++){
 990             const int mb_xy= x + y*s->mb_stride;
 991             const int b_xy = 4*x + 4*y*h->b_stride;
 992
 993             h->mb2b_xy [mb_xy]= b_xy;
 994             h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
 995         }
 996     }
 997
 998     s->obmc_scratchpad = NULL;
 999
1000     if(!h->dequant4_coeff[0])
1001         init_dequant_tables(h);
1002
1003     return 0;
1004 fail:
1005     free_tables(h, 1);
1006     return -1;
1007 }
1008
1009 /**
1010  * Mimic alloc_tables(), but for every context thread.
1011  */
1012 static void clone_tables(H264Context *dst, H264Context *src, int i){
1013     MpegEncContext * const s = &src->s;
1014     dst->intra4x4_pred_mode       = src->intra4x4_pred_mode + i*8*2*s->mb_stride;
1015     dst->non_zero_count           = src->non_zero_count;
1016     dst->slice_table              = src->slice_table;
1017     dst->cbp_table                = src->cbp_table;
1018     dst->mb2b_xy                  = src->mb2b_xy;
1019     dst->mb2br_xy                 = src->mb2br_xy;
1020     dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
1021     dst->mvd_table[0]             = src->mvd_table[0] + i*8*2*s->mb_stride;
1022     dst->mvd_table[1]             = src->mvd_table[1] + i*8*2*s->mb_stride;
1023     dst->direct_table             = src->direct_table;
1024     dst->list_counts              = src->list_counts;
1025
1026     dst->s.obmc_scratchpad = NULL;
1027     ff_h264_pred_init(&dst->hpc, src->s.codec_id, src->sps.bit_depth_luma, src->sps.chroma_format_idc);
1028 }
1029
1030 /**
1031  * Init context
1032  * Allocate buffers which are not shared amongst multiple threads.
1033  */
1034 static int context_init(H264Context *h){
1035     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * 16*3 * sizeof(uint8_t)*2, fail)
1036     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * 16*3 * sizeof(uint8_t)*2, fail)
1037
1038     h->ref_cache[0][scan8[5 ]+1] = h->ref_cache[0][scan8[7 ]+1] = h->ref_cache[0][scan8[13]+1] =
1039     h->ref_cache[1][scan8[5 ]+1] = h->ref_cache[1][scan8[7 ]+1] = h->ref_cache[1][scan8[13]+1] = PART_NOT_AVAILABLE;
1040
1041     return 0;
1042 fail:
1043     return -1; // free_tables will clean up for us
1044 }
1045
1046 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
1047
1048 static av_cold void common_init(H264Context *h){
1049     MpegEncContext * const s = &h->s;
1050
1051     s->width = s->avctx->width;
1052     s->height = s->avctx->height;
1053     s->codec_id= s->avctx->codec->id;
1054
1055     s->avctx->bits_per_raw_sample = 8;
1056     h->cur_chroma_format_idc = 1;
1057
1058     ff_h264dsp_init(&h->h264dsp,
1059                     s->avctx->bits_per_raw_sample, h->cur_chroma_format_idc);
1060     ff_h264_pred_init(&h->hpc, s->codec_id,
1061                       s->avctx->bits_per_raw_sample, h->cur_chroma_format_idc);
1062
1063     h->dequant_coeff_pps= -1;
1064     s->unrestricted_mv=1;
1065
1066     s->dsp.dct_bits = 16;
1067     dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
1068
1069     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
1070     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
1071 }
1072
1073 int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size)
1074 {
1075     AVCodecContext *avctx = h->s.avctx;
1076
1077     if(!buf || size <= 0)
1078         return -1;
1079
1080     if(buf[0] == 1){
1081         int i, cnt, nalsize;
1082         const unsigned char *p = buf;
1083
1084         h->is_avc = 1;
1085
1086         if(size < 7) {
1087             av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
1088             return -1;
1089         }
1090         /* sps and pps in the avcC always have length coded with 2 bytes,
1091            so put a fake nal_length_size = 2 while parsing them */
1092         h->nal_length_size = 2;
1093         // Decode sps from avcC
1094         cnt = *(p+5) & 0x1f; // Number of sps
1095         p += 6;
1096         for (i = 0; i < cnt; i++) {
1097             nalsize = AV_RB16(p) + 2;
1098             if(nalsize > size - (p-buf))
1099                 return -1;
1100             if(decode_nal_units(h, p, nalsize) < 0) {
1101                 av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
1102                 return -1;
1103             }
1104             p += nalsize;
1105         }
1106         // Decode pps from avcC
1107         cnt = *(p++); // Number of pps
1108         for (i = 0; i < cnt; i++) {
1109             nalsize = AV_RB16(p) + 2;
1110             if(nalsize > size - (p-buf))
1111                 return -1;
1112             if (decode_nal_units(h, p, nalsize) < 0) {
1113                 av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
1114                 return -1;
1115             }
1116             p += nalsize;
1117         }
1118         // Now store right nal length size, that will be use to parse all other nals
1119         h->nal_length_size = (buf[4] & 0x03) + 1;
1120     } else {
1121         h->is_avc = 0;
1122         if(decode_nal_units(h, buf, size) < 0)
1123             return -1;
1124     }
1125     return 0;
1126 }
1127
1128 av_cold int ff_h264_decode_init(AVCodecContext *avctx){
1129     H264Context *h= avctx->priv_data;
1130     MpegEncContext * const s = &h->s;
1131     int i;
1132
1133     MPV_decode_defaults(s);
1134
1135     s->avctx = avctx;
1136     common_init(h);
1137
1138     s->out_format = FMT_H264;
1139     s->workaround_bugs= avctx->workaround_bugs;
1140
1141     // set defaults
1142 //    s->decode_mb= ff_h263_decode_mb;
1143     s->quarter_sample = 1;
1144     if(!avctx->has_b_frames)
1145     s->low_delay= 1;
1146
1147     avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1148
1149     ff_h264_decode_init_vlc();
1150
1151     h->pixel_shift = 0;
1152     h->sps.bit_depth_luma = avctx->bits_per_raw_sample = 8;
1153
1154     h->thread_context[0] = h;
1155     h->outputed_poc = h->next_outputed_poc = INT_MIN;
1156     for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
1157         h->last_pocs[i] = INT_MIN;
1158     h->prev_poc_msb= 1<<16;
1159     h->x264_build = -1;
1160     ff_h264_reset_sei(h);
1161     if(avctx->codec_id == CODEC_ID_H264){
1162         if(avctx->ticks_per_frame == 1){
1163             s->avctx->time_base.den *=2;
1164         }
1165         avctx->ticks_per_frame = 2;
1166     }
1167
1168     if(avctx->extradata_size > 0 && avctx->extradata &&
1169         ff_h264_decode_extradata(h, avctx->extradata, avctx->extradata_size))
1170         return -1;
1171
1172     if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
1173         s->avctx->has_b_frames = h->sps.num_reorder_frames;
1174         s->low_delay = 0;
1175     }
1176
1177     return 0;
1178 }
1179
1180 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b)+(size))))
1181 static void copy_picture_range(Picture **to, Picture **from, int count, MpegEncContext *new_base, MpegEncContext *old_base)
1182 {
1183     int i;
1184
1185     for (i=0; i<count; i++){
1186         assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
1187                 IN_RANGE(from[i], old_base->picture, sizeof(Picture) * old_base->picture_count) ||
1188                 !from[i]));
1189         to[i] = REBASE_PICTURE(from[i], new_base, old_base);
1190     }
1191 }
1192
1193 static void copy_parameter_set(void **to, void **from, int count, int size)
1194 {
1195     int i;
1196
1197     for (i=0; i<count; i++){
1198         if (to[i] && !from[i]) av_freep(&to[i]);
1199         else if (from[i] && !to[i]) to[i] = av_malloc(size);
1200
1201         if (from[i]) memcpy(to[i], from[i], size);
1202     }
1203 }
1204
1205 static int decode_init_thread_copy(AVCodecContext *avctx){
1206     H264Context *h= avctx->priv_data;
1207
1208     if (!avctx->is_copy) return 0;
1209     memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1210     memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1211
1212     return 0;
1213 }
1214
1215 #define copy_fields(to, from, start_field, end_field) memcpy(&to->start_field, &from->start_field, (char*)&to->end_field - (char*)&to->start_field)
1216 static int decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src){
1217     H264Context *h= dst->priv_data, *h1= src->priv_data;
1218     MpegEncContext * const s = &h->s, * const s1 = &h1->s;
1219     int inited = s->context_initialized, err;
1220     int i;
1221
1222     if(dst == src || !s1->context_initialized) return 0;
1223
1224     err = ff_mpeg_update_thread_context(dst, src);
1225     if(err) return err;
1226
1227     //FIXME handle width/height changing
1228     if(!inited){
1229         for(i = 0; i < MAX_SPS_COUNT; i++)
1230             av_freep(h->sps_buffers + i);
1231
1232         for(i = 0; i < MAX_PPS_COUNT; i++)
1233             av_freep(h->pps_buffers + i);
1234
1235         memcpy(&h->s + 1, &h1->s + 1, sizeof(H264Context) - sizeof(MpegEncContext)); //copy all fields after MpegEnc
1236         memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1237         memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1238         if (ff_h264_alloc_tables(h) < 0) {
1239             av_log(dst, AV_LOG_ERROR, "Could not allocate memory for h264\n");
1240             return AVERROR(ENOMEM);
1241         }
1242         context_init(h);
1243
1244         for(i=0; i<2; i++){
1245             h->rbsp_buffer[i] = NULL;
1246             h->rbsp_buffer_size[i] = 0;
1247         }
1248
1249         h->thread_context[0] = h;
1250
1251         // frame_start may not be called for the next thread (if it's decoding a bottom field)
1252         // so this has to be allocated here
1253         h->s.obmc_scratchpad = av_malloc(16*6*s->linesize);
1254
1255         s->dsp.clear_blocks(h->mb);
1256         s->dsp.clear_blocks(h->mb+(24*16<<h->pixel_shift));
1257     }
1258
1259     //extradata/NAL handling
1260     h->is_avc          = h1->is_avc;
1261
1262     //SPS/PPS
1263     copy_parameter_set((void**)h->sps_buffers, (void**)h1->sps_buffers, MAX_SPS_COUNT, sizeof(SPS));
1264     h->sps             = h1->sps;
1265     copy_parameter_set((void**)h->pps_buffers, (void**)h1->pps_buffers, MAX_PPS_COUNT, sizeof(PPS));
1266     h->pps             = h1->pps;
1267
1268     //Dequantization matrices
1269     //FIXME these are big - can they be only copied when PPS changes?
1270     copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
1271
1272     for(i=0; i<6; i++)
1273         h->dequant4_coeff[i] = h->dequant4_buffer[0] + (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
1274
1275     for(i=0; i<6; i++)
1276         h->dequant8_coeff[i] = h->dequant8_buffer[0] + (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
1277
1278     h->dequant_coeff_pps = h1->dequant_coeff_pps;
1279
1280     //POC timing
1281     copy_fields(h, h1, poc_lsb, redundant_pic_count);
1282
1283     //reference lists
1284     copy_fields(h, h1, ref_count, list_count);
1285     copy_fields(h, h1, ref_list,  intra_gb);
1286     copy_fields(h, h1, short_ref, cabac_init_idc);
1287
1288     copy_picture_range(h->short_ref,   h1->short_ref,   32, s, s1);
1289     copy_picture_range(h->long_ref,    h1->long_ref,    32, s, s1);
1290     copy_picture_range(h->delayed_pic, h1->delayed_pic, MAX_DELAYED_PIC_COUNT+2, s, s1);
1291
1292     h->last_slice_type = h1->last_slice_type;
1293     h->sync            = h1->sync;
1294
1295     if(!s->current_picture_ptr) return 0;
1296
1297     if(!s->dropable) {
1298         err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1299         h->prev_poc_msb     = h->poc_msb;
1300         h->prev_poc_lsb     = h->poc_lsb;
1301     }
1302     h->prev_frame_num_offset= h->frame_num_offset;
1303     h->prev_frame_num       = h->frame_num;
1304     h->outputed_poc         = h->next_outputed_poc;
1305
1306     return err;
1307 }
1308
1309 int ff_h264_frame_start(H264Context *h){
1310     MpegEncContext * const s = &h->s;
1311     int i;
1312     const int pixel_shift = h->pixel_shift;
1313     int thread_count = (s->avctx->active_thread_type & FF_THREAD_SLICE) ? s->avctx->thread_count : 1;
1314
1315     if(MPV_frame_start(s, s->avctx) < 0)
1316         return -1;
1317     ff_er_frame_start(s);
1318     /*
1319      * MPV_frame_start uses pict_type to derive key_frame.
1320      * This is incorrect for H.264; IDR markings must be used.
1321      * Zero here; IDR markings per slice in frame or fields are ORed in later.
1322      * See decode_nal_units().
1323      */
1324     s->current_picture_ptr->f.key_frame = 0;
1325     s->current_picture_ptr->mmco_reset= 0;
1326
1327     assert(s->linesize && s->uvlinesize);
1328
1329     for(i=0; i<16; i++){
1330         h->block_offset[i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
1331         h->block_offset[48+i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
1332     }
1333     for(i=0; i<16; i++){
1334         h->block_offset[16+i]=
1335         h->block_offset[32+i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
1336         h->block_offset[48+16+i]=
1337         h->block_offset[48+32+i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
1338     }
1339
1340     /* can't be in alloc_tables because linesize isn't known there.
1341      * FIXME: redo bipred weight to not require extra buffer? */
1342     for(i = 0; i < thread_count; i++)
1343         if(h->thread_context[i] && !h->thread_context[i]->s.obmc_scratchpad)
1344             h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*6*s->linesize);
1345
1346     /* some macroblocks can be accessed before they're available in case of lost slices, mbaff or threading*/
1347     memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
1348
1349 //    s->decode = (s->flags & CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.f.reference /*|| h->contains_intra*/ || 1;
1350
1351     // We mark the current picture as non-reference after allocating it, so
1352     // that if we break out due to an error it can be released automatically
1353     // in the next MPV_frame_start().
1354     // SVQ3 as well as most other codecs have only last/next/current and thus
1355     // get released even with set reference, besides SVQ3 and others do not
1356     // mark frames as reference later "naturally".
1357     if(s->codec_id != CODEC_ID_SVQ3)
1358         s->current_picture_ptr->f.reference = 0;
1359
1360     s->current_picture_ptr->field_poc[0]=
1361     s->current_picture_ptr->field_poc[1]= INT_MAX;
1362
1363     h->next_output_pic = NULL;
1364
1365     assert(s->current_picture_ptr->long_ref==0);
1366
1367     return 0;
1368 }
1369
1370 /**
1371   * Run setup operations that must be run after slice header decoding.
1372   * This includes finding the next displayed frame.
1373   *
1374   * @param h h264 master context
1375   * @param setup_finished enough NALs have been read that we can call
1376   * ff_thread_finish_setup()
1377   */
1378 static void decode_postinit(H264Context *h, int setup_finished){
1379     MpegEncContext * const s = &h->s;
1380     Picture *out = s->current_picture_ptr;
1381     Picture *cur = s->current_picture_ptr;
1382     int i, pics, out_of_order, out_idx;
1383
1384     s->current_picture_ptr->f.qscale_type = FF_QSCALE_TYPE_H264;
1385     s->current_picture_ptr->f.pict_type   = s->pict_type;
1386
1387     if (h->next_output_pic) return;
1388
1389     if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
1390         //FIXME: if we have two PAFF fields in one packet, we can't start the next thread here.
1391         //If we have one field per packet, we can. The check in decode_nal_units() is not good enough
1392         //to find this yet, so we assume the worst for now.
1393         //if (setup_finished)
1394         //    ff_thread_finish_setup(s->avctx);
1395         return;
1396     }
1397
1398     cur->f.interlaced_frame = 0;
1399     cur->f.repeat_pict      = 0;
1400
1401     /* Signal interlacing information externally. */
1402     /* Prioritize picture timing SEI information over used decoding process if it exists. */
1403
1404     if(h->sps.pic_struct_present_flag){
1405         switch (h->sei_pic_struct)
1406         {
1407         case SEI_PIC_STRUCT_FRAME:
1408             break;
1409         case SEI_PIC_STRUCT_TOP_FIELD:
1410         case SEI_PIC_STRUCT_BOTTOM_FIELD:
1411             cur->f.interlaced_frame = 1;
1412             break;
1413         case SEI_PIC_STRUCT_TOP_BOTTOM:
1414         case SEI_PIC_STRUCT_BOTTOM_TOP:
1415             if (FIELD_OR_MBAFF_PICTURE)
1416                 cur->f.interlaced_frame = 1;
1417             else
1418                 // try to flag soft telecine progressive
1419                 cur->f.interlaced_frame = h->prev_interlaced_frame;
1420             break;
1421         case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
1422         case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
1423             // Signal the possibility of telecined film externally (pic_struct 5,6)
1424             // From these hints, let the applications decide if they apply deinterlacing.
1425             cur->f.repeat_pict = 1;
1426             break;
1427         case SEI_PIC_STRUCT_FRAME_DOUBLING:
1428             // Force progressive here, as doubling interlaced frame is a bad idea.
1429             cur->f.repeat_pict = 2;
1430             break;
1431         case SEI_PIC_STRUCT_FRAME_TRIPLING:
1432             cur->f.repeat_pict = 4;
1433             break;
1434         }
1435
1436         if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
1437             cur->f.interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
1438     }else{
1439         /* Derive interlacing flag from used decoding process. */
1440         cur->f.interlaced_frame = FIELD_OR_MBAFF_PICTURE;
1441     }
1442     h->prev_interlaced_frame = cur->f.interlaced_frame;
1443
1444     if (cur->field_poc[0] != cur->field_poc[1]){
1445         /* Derive top_field_first from field pocs. */
1446         cur->f.top_field_first = cur->field_poc[0] < cur->field_poc[1];
1447     }else{
1448         if (cur->f.interlaced_frame || h->sps.pic_struct_present_flag) {
1449             /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
1450             if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
1451               || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
1452                 cur->f.top_field_first = 1;
1453             else
1454                 cur->f.top_field_first = 0;
1455         }else{
1456             /* Most likely progressive */
1457             cur->f.top_field_first = 0;
1458         }
1459     }
1460
1461     //FIXME do something with unavailable reference frames
1462
1463     /* Sort B-frames into display order */
1464
1465     if(h->sps.bitstream_restriction_flag
1466        && s->avctx->has_b_frames < h->sps.num_reorder_frames){
1467         s->avctx->has_b_frames = h->sps.num_reorder_frames;
1468         s->low_delay = 0;
1469     }
1470
1471     if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
1472        && !h->sps.bitstream_restriction_flag){
1473         s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
1474         s->low_delay= 0;
1475     }
1476
1477     pics = 0;
1478     while(h->delayed_pic[pics]) pics++;
1479
1480     av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
1481
1482     h->delayed_pic[pics++] = cur;
1483     if (cur->f.reference == 0)
1484         cur->f.reference = DELAYED_PIC_REF;
1485
1486     out = h->delayed_pic[0];
1487     out_idx = 0;
1488     for (i = 1; h->delayed_pic[i] && !h->delayed_pic[i]->f.key_frame && !h->delayed_pic[i]->mmco_reset; i++)
1489         if(h->delayed_pic[i]->poc < out->poc){
1490             out = h->delayed_pic[i];
1491             out_idx = i;
1492         }
1493     if (s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset))
1494         h->next_outputed_poc= INT_MIN;
1495     out_of_order = out->poc < h->next_outputed_poc;
1496
1497     if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
1498         { }
1499     else if (out_of_order && pics-1 == s->avctx->has_b_frames &&
1500              s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT) {
1501         int cnt = 0, invalid = 0;
1502         for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++) {
1503             cnt += out->poc < h->last_pocs[i];
1504             invalid += h->last_pocs[i] == INT_MIN;
1505         }
1506         if (invalid + cnt < MAX_DELAYED_PIC_COUNT) {
1507             s->avctx->has_b_frames = FFMAX(s->avctx->has_b_frames, cnt);
1508         } else if (cnt) {
1509             for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
1510                 h->last_pocs[i] = INT_MIN;
1511         }
1512         s->low_delay = 0;
1513     } else if (s->low_delay &&
1514                ((h->next_outputed_poc != INT_MIN && out->poc > h->next_outputed_poc + 2) ||
1515                 cur->f.pict_type == AV_PICTURE_TYPE_B)) {
1516         s->low_delay = 0;
1517         s->avctx->has_b_frames++;
1518     }
1519
1520     if(out_of_order || pics > s->avctx->has_b_frames){
1521         out->f.reference &= ~DELAYED_PIC_REF;
1522         out->owner2 = s; // for frame threading, the owner must be the second field's thread
1523                          // or else the first thread can release the picture and reuse it unsafely
1524         for(i=out_idx; h->delayed_pic[i]; i++)
1525             h->delayed_pic[i] = h->delayed_pic[i+1];
1526     }
1527     memmove(h->last_pocs, &h->last_pocs[1], sizeof(*h->last_pocs) * (MAX_DELAYED_PIC_COUNT - 1));
1528     h->last_pocs[MAX_DELAYED_PIC_COUNT - 1] = out->poc;
1529     if(!out_of_order && pics > s->avctx->has_b_frames){
1530         h->next_output_pic = out;
1531         if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset)) {
1532             h->next_outputed_poc = INT_MIN;
1533         } else
1534             h->next_outputed_poc = out->poc;
1535     }else{
1536         av_log(s->avctx, AV_LOG_DEBUG, "no picture\n");
1537     }
1538
1539     if (h->next_output_pic && h->next_output_pic->sync) {
1540         h->sync |= 2;
1541     }
1542
1543     if (setup_finished)
1544         ff_thread_finish_setup(s->avctx);
1545 }
1546
1547 static av_always_inline void backup_mb_border(H264Context *h, uint8_t *src_y,
1548                                               uint8_t *src_cb, uint8_t *src_cr,
1549                                               int linesize, int uvlinesize, int simple)
1550 {
1551     MpegEncContext * const s = &h->s;
1552     uint8_t *top_border;
1553     int top_idx = 1;
1554     const int pixel_shift = h->pixel_shift;
1555     int chroma444 = CHROMA444;
1556     int chroma422 = CHROMA422;
1557
1558     src_y  -=   linesize;
1559     src_cb -= uvlinesize;
1560     src_cr -= uvlinesize;
1561
1562     if(!simple && FRAME_MBAFF){
1563         if(s->mb_y&1){
1564             if(!MB_MBAFF){
1565                 top_border = h->top_borders[0][s->mb_x];
1566                 AV_COPY128(top_border, src_y + 15*linesize);
1567                 if (pixel_shift)
1568                     AV_COPY128(top_border+16, src_y+15*linesize+16);
1569                 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1570                     if(chroma444){
1571                         if (pixel_shift){
1572                             AV_COPY128(top_border+32, src_cb + 15*uvlinesize);
1573                             AV_COPY128(top_border+48, src_cb + 15*uvlinesize+16);
1574                             AV_COPY128(top_border+64, src_cr + 15*uvlinesize);
1575                             AV_COPY128(top_border+80, src_cr + 15*uvlinesize+16);
1576                         } else {
1577                             AV_COPY128(top_border+16, src_cb + 15*uvlinesize);
1578                             AV_COPY128(top_border+32, src_cr + 15*uvlinesize);
1579                         }
1580                     } else if(chroma422){
1581                         if (pixel_shift) {
1582                             AV_COPY128(top_border+32, src_cb + 15*uvlinesize);
1583                             AV_COPY128(top_border+48, src_cr + 15*uvlinesize);
1584                         } else {
1585                             AV_COPY64(top_border+16, src_cb +  15*uvlinesize);
1586                             AV_COPY64(top_border+24, src_cr +  15*uvlinesize);
1587                         }
1588                     } else {
1589                         if (pixel_shift) {
1590                             AV_COPY128(top_border+32, src_cb+7*uvlinesize);
1591                             AV_COPY128(top_border+48, src_cr+7*uvlinesize);
1592                         } else {
1593                             AV_COPY64(top_border+16, src_cb+7*uvlinesize);
1594                             AV_COPY64(top_border+24, src_cr+7*uvlinesize);
1595                         }
1596                     }
1597                 }
1598             }
1599         }else if(MB_MBAFF){
1600             top_idx = 0;
1601         }else
1602             return;
1603     }
1604
1605     top_border = h->top_borders[top_idx][s->mb_x];
1606     // There are two lines saved, the line above the the top macroblock of a pair,
1607     // and the line above the bottom macroblock
1608     AV_COPY128(top_border, src_y + 16*linesize);
1609     if (pixel_shift)
1610         AV_COPY128(top_border+16, src_y+16*linesize+16);
1611
1612     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1613         if(chroma444){
1614             if (pixel_shift){
1615                 AV_COPY128(top_border+32, src_cb + 16*linesize);
1616                 AV_COPY128(top_border+48, src_cb + 16*linesize+16);
1617                 AV_COPY128(top_border+64, src_cr + 16*linesize);
1618                 AV_COPY128(top_border+80, src_cr + 16*linesize+16);
1619             } else {
1620                 AV_COPY128(top_border+16, src_cb + 16*linesize);
1621                 AV_COPY128(top_border+32, src_cr + 16*linesize);
1622             }
1623         } else if(chroma422) {
1624             if (pixel_shift) {
1625                 AV_COPY128(top_border+32, src_cb+16*uvlinesize);
1626                 AV_COPY128(top_border+48, src_cr+16*uvlinesize);
1627             } else {
1628                 AV_COPY64(top_border+16, src_cb+16*uvlinesize);
1629                 AV_COPY64(top_border+24, src_cr+16*uvlinesize);
1630             }
1631         } else {
1632             if (pixel_shift) {
1633                 AV_COPY128(top_border+32, src_cb+8*uvlinesize);
1634                 AV_COPY128(top_border+48, src_cr+8*uvlinesize);
1635             } else {
1636                 AV_COPY64(top_border+16, src_cb+8*uvlinesize);
1637                 AV_COPY64(top_border+24, src_cr+8*uvlinesize);
1638             }
1639         }
1640     }
1641 }
1642
1643 static av_always_inline void xchg_mb_border(H264Context *h, uint8_t *src_y,
1644                                   uint8_t *src_cb, uint8_t *src_cr,
1645                                   int linesize, int uvlinesize,
1646                                   int xchg, int chroma444,
1647                                   int simple, int pixel_shift){
1648     MpegEncContext * const s = &h->s;
1649     int deblock_topleft;
1650     int deblock_top;
1651     int top_idx = 1;
1652     uint8_t *top_border_m1;
1653     uint8_t *top_border;
1654
1655     if(!simple && FRAME_MBAFF){
1656         if(s->mb_y&1){
1657             if(!MB_MBAFF)
1658                 return;
1659         }else{
1660             top_idx = MB_MBAFF ? 0 : 1;
1661         }
1662     }
1663
1664     if(h->deblocking_filter == 2) {
1665         deblock_topleft = h->slice_table[h->mb_xy - 1 - s->mb_stride] == h->slice_num;
1666         deblock_top     = h->top_type;
1667     } else {
1668         deblock_topleft = (s->mb_x > 0);
1669         deblock_top     = (s->mb_y > !!MB_FIELD);
1670     }
1671
1672     src_y  -=   linesize + 1 + pixel_shift;
1673     src_cb -= uvlinesize + 1 + pixel_shift;
1674     src_cr -= uvlinesize + 1 + pixel_shift;
1675
1676     top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1677     top_border    = h->top_borders[top_idx][s->mb_x];
1678
1679 #define XCHG(a,b,xchg)\
1680     if (pixel_shift) {\
1681         if (xchg) {\
1682             AV_SWAP64(b+0,a+0);\
1683             AV_SWAP64(b+8,a+8);\
1684         } else {\
1685             AV_COPY128(b,a); \
1686         }\
1687     } else \
1688 if (xchg) AV_SWAP64(b,a);\
1689 else      AV_COPY64(b,a);
1690
1691     if(deblock_top){
1692         if(deblock_topleft){
1693             XCHG(top_border_m1 + (8 << pixel_shift), src_y - (7 << pixel_shift), 1);
1694         }
1695         XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);
1696         XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);
1697         if(s->mb_x+1 < s->mb_width){
1698             XCHG(h->top_borders[top_idx][s->mb_x+1], src_y + (17 << pixel_shift), 1);
1699         }
1700     }
1701     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1702         if(chroma444){
1703             if(deblock_topleft){
1704                 XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);
1705                 XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);
1706             }
1707             XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);
1708             XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);
1709             XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);
1710             XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);
1711             if(s->mb_x+1 < s->mb_width){
1712                 XCHG(h->top_borders[top_idx][s->mb_x+1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);
1713                 XCHG(h->top_borders[top_idx][s->mb_x+1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);
1714             }
1715         } else {
1716             if(deblock_top){
1717                 if(deblock_topleft){
1718                     XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);
1719                     XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);
1720                 }
1721                 XCHG(top_border + (16 << pixel_shift), src_cb+1+pixel_shift, 1);
1722                 XCHG(top_border + (24 << pixel_shift), src_cr+1+pixel_shift, 1);
1723             }
1724         }
1725     }
1726 }
1727
1728 static av_always_inline int dctcoef_get(DCTELEM *mb, int high_bit_depth, int index) {
1729     if (high_bit_depth) {
1730         return AV_RN32A(((int32_t*)mb) + index);
1731     } else
1732         return AV_RN16A(mb + index);
1733 }
1734
1735 static av_always_inline void dctcoef_set(DCTELEM *mb, int high_bit_depth, int index, int value) {
1736     if (high_bit_depth) {
1737         AV_WN32A(((int32_t*)mb) + index, value);
1738     } else
1739         AV_WN16A(mb + index, value);
1740 }
1741
1742 static av_always_inline void hl_decode_mb_predict_luma(H264Context *h, int mb_type, int is_h264, int simple, int transform_bypass,
1743                                                        int pixel_shift, int *block_offset, int linesize, uint8_t *dest_y, int p)
1744 {
1745     MpegEncContext * const s = &h->s;
1746     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1747     void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1748     int i;
1749     int qscale = p == 0 ? s->qscale : h->chroma_qp[p-1];
1750     block_offset += 16*p;
1751     if(IS_INTRA4x4(mb_type)){
1752         if(simple || !s->encoding){
1753             if(IS_8x8DCT(mb_type)){
1754                 if(transform_bypass){
1755                     idct_dc_add =
1756                     idct_add    = s->dsp.add_pixels8;
1757                 }else{
1758                     idct_dc_add = h->h264dsp.h264_idct8_dc_add;
1759                     idct_add    = h->h264dsp.h264_idct8_add;
1760                 }
1761                 for(i=0; i<16; i+=4){
1762                     uint8_t * const ptr= dest_y + block_offset[i];
1763                     const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1764                     if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1765                         h->hpc.pred8x8l_add[dir](ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1766                     }else{
1767                         const int nnz = h->non_zero_count_cache[ scan8[i+p*16] ];
1768                         h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1769                                                     (h->topright_samples_available<<i)&0x4000, linesize);
1770                         if(nnz){
1771                             if(nnz == 1 && dctcoef_get(h->mb, pixel_shift, i*16+p*256))
1772                                 idct_dc_add(ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1773                             else
1774                                 idct_add   (ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1775                         }
1776                     }
1777                 }
1778             }else{
1779                 if(transform_bypass){
1780                     idct_dc_add =
1781                     idct_add    = s->dsp.add_pixels4;
1782                 }else{
1783                     idct_dc_add = h->h264dsp.h264_idct_dc_add;
1784                     idct_add    = h->h264dsp.h264_idct_add;
1785                 }
1786                 for(i=0; i<16; i++){
1787                     uint8_t * const ptr= dest_y + block_offset[i];
1788                     const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1789
1790                     if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1791                         h->hpc.pred4x4_add[dir](ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1792                     }else{
1793                         uint8_t *topright;
1794                         int nnz, tr;
1795                         uint64_t tr_high;
1796                         if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1797                             const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1798                             assert(s->mb_y || linesize <= block_offset[i]);
1799                             if(!topright_avail){
1800                                 if (pixel_shift) {
1801                                     tr_high= ((uint16_t*)ptr)[3 - linesize/2]*0x0001000100010001ULL;
1802                                     topright= (uint8_t*) &tr_high;
1803                                 } else {
1804                                     tr= ptr[3 - linesize]*0x01010101u;
1805                                     topright= (uint8_t*) &tr;
1806                                 }
1807                             }else
1808                                 topright= ptr + (4 << pixel_shift) - linesize;
1809                         }else
1810                             topright= NULL;
1811
1812                         h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1813                         nnz = h->non_zero_count_cache[ scan8[i+p*16] ];
1814                         if(nnz){
1815                             if(is_h264){
1816                                 if(nnz == 1 && dctcoef_get(h->mb, pixel_shift, i*16+p*256))
1817                                     idct_dc_add(ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1818                                 else
1819                                     idct_add   (ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1820                             }else
1821                                 ff_svq3_add_idct_c(ptr, h->mb + i*16+p*256, linesize, qscale, 0);
1822                         }
1823                     }
1824                 }
1825             }
1826         }
1827     }else{
1828         h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1829         if(is_h264){
1830             if(h->non_zero_count_cache[ scan8[LUMA_DC_BLOCK_INDEX+p] ]){
1831                 if(!transform_bypass)
1832                     h->h264dsp.h264_luma_dc_dequant_idct(h->mb+(p*256 << pixel_shift), h->mb_luma_dc[p], h->dequant4_coeff[p][qscale][0]);
1833                 else{
1834                     static const uint8_t dc_mapping[16] = { 0*16, 1*16, 4*16, 5*16, 2*16, 3*16, 6*16, 7*16,
1835                                                             8*16, 9*16,12*16,13*16,10*16,11*16,14*16,15*16};
1836                     for(i = 0; i < 16; i++)
1837                         dctcoef_set(h->mb+(p*256 << pixel_shift), pixel_shift, dc_mapping[i], dctcoef_get(h->mb_luma_dc[p], pixel_shift, i));
1838                 }
1839             }
1840         }else
1841             ff_svq3_luma_dc_dequant_idct_c(h->mb+p*256, h->mb_luma_dc[p], qscale);
1842     }
1843 }
1844
1845 static av_always_inline void hl_decode_mb_idct_luma(H264Context *h, int mb_type, int is_h264, int simple, int transform_bypass,
1846                                                     int pixel_shift, int *block_offset, int linesize, uint8_t *dest_y, int p)
1847 {
1848     MpegEncContext * const s = &h->s;
1849     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1850     int i;
1851     block_offset += 16*p;
1852     if(!IS_INTRA4x4(mb_type)){
1853         if(is_h264){
1854             if(IS_INTRA16x16(mb_type)){
1855                 if(transform_bypass){
1856                     if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1857                         h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize);
1858                     }else{
1859                         for(i=0; i<16; i++){
1860                             if(h->non_zero_count_cache[ scan8[i+p*16] ] || dctcoef_get(h->mb, pixel_shift, i*16+p*256))
1861                                 s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + (i*16+p*256 << pixel_shift), linesize);
1862                         }
1863                     }
1864                 }else{
1865                     h->h264dsp.h264_idct_add16intra(dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize, h->non_zero_count_cache+p*5*8);
1866                 }
1867             }else if(h->cbp&15){
1868                 if(transform_bypass){
1869                     const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1870                     idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1871                     for(i=0; i<16; i+=di){
1872                         if(h->non_zero_count_cache[ scan8[i+p*16] ]){
1873                             idct_add(dest_y + block_offset[i], h->mb + (i*16+p*256 << pixel_shift), linesize);
1874                         }
1875                     }
1876                 }else{
1877                     if(IS_8x8DCT(mb_type)){
1878                         h->h264dsp.h264_idct8_add4(dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize, h->non_zero_count_cache+p*5*8);
1879                     }else{
1880                         h->h264dsp.h264_idct_add16(dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize, h->non_zero_count_cache+p*5*8);
1881                     }
1882                 }
1883             }
1884         }else{
1885             for(i=0; i<16; i++){
1886                 if(h->non_zero_count_cache[ scan8[i+p*16] ] || h->mb[i*16+p*256]){ //FIXME benchmark weird rule, & below
1887                     uint8_t * const ptr= dest_y + block_offset[i];
1888                     ff_svq3_add_idct_c(ptr, h->mb + i*16 + p*256, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1889                 }
1890             }
1891         }
1892     }
1893 }
1894
1895 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple, int pixel_shift)
1896 {
1897     MpegEncContext * const s = &h->s;
1898     const int mb_x= s->mb_x;
1899     const int mb_y= s->mb_y;
1900     const int mb_xy= h->mb_xy;
1901     const int mb_type = s->current_picture.f.mb_type[mb_xy];
1902     uint8_t  *dest_y, *dest_cb, *dest_cr;
1903     int linesize, uvlinesize /*dct_offset*/;
1904     int i, j;
1905     int *block_offset = &h->block_offset[0];
1906     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1907     /* is_h264 should always be true if SVQ3 is disabled. */
1908     const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1909     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1910     const int block_h = 16 >> s->chroma_y_shift;
1911     const int chroma422 = CHROMA422;
1912
1913     dest_y  = s->current_picture.f.data[0] + ((mb_x << pixel_shift) + mb_y * s->linesize  ) * 16;
1914     dest_cb = s->current_picture.f.data[1] + (mb_x << pixel_shift)*8 + mb_y * s->uvlinesize * block_h;
1915     dest_cr = s->current_picture.f.data[2] + (mb_x << pixel_shift)*8 + mb_y * s->uvlinesize * block_h;
1916
1917     s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + (64 << pixel_shift), s->linesize, 4);
1918     s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + (64 << pixel_shift), dest_cr - dest_cb, 2);
1919
1920     h->list_counts[mb_xy]= h->list_count;
1921
1922     if (!simple && MB_FIELD) {
1923         linesize   = h->mb_linesize   = s->linesize * 2;
1924         uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1925         block_offset = &h->block_offset[48];
1926         if(mb_y&1){ //FIXME move out of this function?
1927             dest_y -= s->linesize*15;
1928             dest_cb-= s->uvlinesize * (block_h - 1);
1929             dest_cr-= s->uvlinesize * (block_h - 1);
1930         }
1931         if(FRAME_MBAFF) {
1932             int list;
1933             for(list=0; list<h->list_count; list++){
1934                 if(!USES_LIST(mb_type, list))
1935                     continue;
1936                 if(IS_16X16(mb_type)){
1937                     int8_t *ref = &h->ref_cache[list][scan8[0]];
1938                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1939                 }else{
1940                     for(i=0; i<16; i+=4){
1941                         int ref = h->ref_cache[list][scan8[i]];
1942                         if(ref >= 0)
1943                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1944                     }
1945                 }
1946             }
1947         }
1948     } else {
1949         linesize   = h->mb_linesize   = s->linesize;
1950         uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1951 //        dct_offset = s->linesize * 16;
1952     }
1953
1954     if (!simple && IS_INTRA_PCM(mb_type)) {
1955         const int bit_depth = h->sps.bit_depth_luma;
1956         if (pixel_shift) {
1957             int j;
1958             GetBitContext gb;
1959             init_get_bits(&gb, (uint8_t*)h->mb, 384*bit_depth);
1960
1961             for (i = 0; i < 16; i++) {
1962                 uint16_t *tmp_y  = (uint16_t*)(dest_y  + i*linesize);
1963                 for (j = 0; j < 16; j++)
1964                     tmp_y[j] = get_bits(&gb, bit_depth);
1965             }
1966             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1967                 if (!h->sps.chroma_format_idc) {
1968                     for (i = 0; i < block_h; i++) {
1969                         uint16_t *tmp_cb = (uint16_t*)(dest_cb + i*uvlinesize);
1970                         uint16_t *tmp_cr = (uint16_t*)(dest_cr + i*uvlinesize);
1971                         for (j = 0; j < 8; j++) {
1972                             tmp_cb[j] = tmp_cr[j] = 1 << (bit_depth - 1);
1973                         }
1974                     }
1975                 } else {
1976                     for (i = 0; i < block_h; i++) {
1977                         uint16_t *tmp_cb = (uint16_t*)(dest_cb + i*uvlinesize);
1978                         for (j = 0; j < 8; j++)
1979                             tmp_cb[j] = get_bits(&gb, bit_depth);
1980                     }
1981                     for (i = 0; i < block_h; i++) {
1982                         uint16_t *tmp_cr = (uint16_t*)(dest_cr + i*uvlinesize);
1983                         for (j = 0; j < 8; j++)
1984                             tmp_cr[j] = get_bits(&gb, bit_depth);
1985                     }
1986                 }
1987             }
1988         } else {
1989             for (i=0; i<16; i++) {
1990                 memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1991             }
1992             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1993                 if (!h->sps.chroma_format_idc) {
1994                     for (i=0; i<8; i++) {
1995                         memset(dest_cb + i*uvlinesize, 1 << (bit_depth - 1), 8);
1996                         memset(dest_cr + i*uvlinesize, 1 << (bit_depth - 1), 8);
1997                     }
1998                 } else {
1999                     for (i=0; i<block_h; i++) {
2000                         memcpy(dest_cb + i*uvlinesize, h->mb + 128 + i*4,  8);
2001                         memcpy(dest_cr + i*uvlinesize, h->mb + 160 + i*4,  8);
2002                     }
2003                 }
2004             }
2005         }
2006     } else {
2007         if(IS_INTRA(mb_type)){
2008             if(h->deblocking_filter)
2009                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, 0, simple, pixel_shift);
2010
2011             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2012                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
2013                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
2014             }
2015
2016             hl_decode_mb_predict_luma(h, mb_type, is_h264, simple, transform_bypass, pixel_shift, block_offset, linesize, dest_y, 0);
2017
2018             if(h->deblocking_filter)
2019                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, 0, simple, pixel_shift);
2020         }else if(is_h264){
2021             if (chroma422) {
2022                 hl_motion_422(h, dest_y, dest_cb, dest_cr,
2023                               s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2024                               s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2025                               h->h264dsp.weight_h264_pixels_tab,
2026                               h->h264dsp.biweight_h264_pixels_tab,
2027                               pixel_shift);
2028             } else {
2029                 hl_motion_420(h, dest_y, dest_cb, dest_cr,
2030                               s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2031                               s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2032                               h->h264dsp.weight_h264_pixels_tab,
2033                               h->h264dsp.biweight_h264_pixels_tab,
2034                               pixel_shift);
2035             }
2036         }
2037
2038         hl_decode_mb_idct_luma(h, mb_type, is_h264, simple, transform_bypass, pixel_shift, block_offset, linesize, dest_y, 0);
2039
2040         if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
2041             uint8_t *dest[2] = {dest_cb, dest_cr};
2042             if(transform_bypass){
2043                 if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
2044                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + (16*16*1 << pixel_shift), uvlinesize);
2045                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 32, h->mb + (16*16*2 << pixel_shift), uvlinesize);
2046                 }else{
2047                     idct_add = s->dsp.add_pixels4;
2048                     for(j=1; j<3; j++){
2049                         for(i=j*16; i<j*16+4; i++){
2050                             if(h->non_zero_count_cache[ scan8[i] ] || dctcoef_get(h->mb, pixel_shift, i*16))
2051                                 idct_add   (dest[j-1] + block_offset[i], h->mb + (i*16 << pixel_shift), uvlinesize);
2052                         }
2053                         if (chroma422) {
2054                             for(i=j*16+4; i<j*16+8; i++){
2055                                 if(h->non_zero_count_cache[ scan8[i+4] ] || dctcoef_get(h->mb, pixel_shift, i*16))
2056                                     idct_add   (dest[j-1] + block_offset[i+4], h->mb + (i*16 << pixel_shift), uvlinesize);
2057                             }
2058                         }
2059                     }
2060                 }
2061             }else{
2062                 if(is_h264){
2063                     int qp[2];
2064                     if (chroma422) {
2065                         qp[0] = h->chroma_qp[0] + 3;
2066                         qp[1] = h->chroma_qp[1] + 3;
2067                     } else {
2068                         qp[0] = h->chroma_qp[0];
2069                         qp[1] = h->chroma_qp[1];
2070                     }
2071                     if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+0] ])
2072                         h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + (16*16*1 << pixel_shift), h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][qp[0]][0]);
2073                     if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+1] ])
2074                         h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + (16*16*2 << pixel_shift), h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][qp[1]][0]);
2075                     h->h264dsp.h264_idct_add8(dest, block_offset,
2076                                               h->mb, uvlinesize,
2077                                               h->non_zero_count_cache);
2078                 }
2079 #if CONFIG_SVQ3_DECODER
2080                 else{
2081                     h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16*1, h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
2082                     h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16*2, h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
2083                     for(j=1; j<3; j++){
2084                         for(i=j*16; i<j*16+4; i++){
2085                             if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
2086                                 uint8_t * const ptr= dest[j-1] + block_offset[i];
2087                                 ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[0][s->qscale + 12] - 12, 2);
2088                             }
2089                         }
2090                     }
2091                 }
2092 #endif
2093             }
2094         }
2095     }
2096     if(h->cbp || IS_INTRA(mb_type))
2097     {
2098         s->dsp.clear_blocks(h->mb);
2099         s->dsp.clear_blocks(h->mb+(24*16<<pixel_shift));
2100     }
2101 }
2102
2103 static av_always_inline void hl_decode_mb_444_internal(H264Context *h, int simple, int pixel_shift){
2104     MpegEncContext * const s = &h->s;
2105     const int mb_x= s->mb_x;
2106     const int mb_y= s->mb_y;
2107     const int mb_xy= h->mb_xy;
2108     const int mb_type = s->current_picture.f.mb_type[mb_xy];
2109     uint8_t  *dest[3];
2110     int linesize;
2111     int i, j, p;
2112     int *block_offset = &h->block_offset[0];
2113     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
2114     const int plane_count = (simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) ? 3 : 1;
2115
2116     for (p = 0; p < plane_count; p++)
2117     {
2118         dest[p] = s->current_picture.f.data[p] + ((mb_x << pixel_shift) + mb_y * s->linesize) * 16;
2119         s->dsp.prefetch(dest[p] + (s->mb_x&3)*4*s->linesize + (64 << pixel_shift), s->linesize, 4);
2120     }
2121
2122     h->list_counts[mb_xy]= h->list_count;
2123
2124     if (!simple && MB_FIELD) {
2125         linesize   = h->mb_linesize = h->mb_uvlinesize = s->linesize * 2;
2126         block_offset = &h->block_offset[48];
2127         if(mb_y&1) //FIXME move out of this function?
2128             for (p = 0; p < 3; p++)
2129                 dest[p] -= s->linesize*15;
2130         if(FRAME_MBAFF) {
2131             int list;
2132             for(list=0; list<h->list_count; list++){
2133                 if(!USES_LIST(mb_type, list))
2134                     continue;
2135                 if(IS_16X16(mb_type)){
2136                     int8_t *ref = &h->ref_cache[list][scan8[0]];
2137                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
2138                 }else{
2139                     for(i=0; i<16; i+=4){
2140                         int ref = h->ref_cache[list][scan8[i]];
2141                         if(ref >= 0)
2142                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
2143                     }
2144                 }
2145             }
2146         }
2147     } else {
2148         linesize   = h->mb_linesize = h->mb_uvlinesize = s->linesize;
2149     }
2150
2151     if (!simple && IS_INTRA_PCM(mb_type)) {
2152         if (pixel_shift) {
2153             const int bit_depth = h->sps.bit_depth_luma;
2154             GetBitContext gb;
2155             init_get_bits(&gb, (uint8_t*)h->mb, 768*bit_depth);
2156
2157             for (p = 0; p < plane_count; p++) {
2158                 for (i = 0; i < 16; i++) {
2159                     uint16_t *tmp = (uint16_t*)(dest[p] + i*linesize);
2160                     for (j = 0; j < 16; j++)
2161                         tmp[j] = get_bits(&gb, bit_depth);
2162                 }
2163             }
2164         } else {
2165             for (p = 0; p < plane_count; p++) {
2166                 for (i = 0; i < 16; i++) {
2167                     memcpy(dest[p] + i*linesize, h->mb + p*128 + i*8, 16);
2168                 }
2169             }
2170         }
2171     } else {
2172         if(IS_INTRA(mb_type)){
2173             if(h->deblocking_filter)
2174                 xchg_mb_border(h, dest[0], dest[1], dest[2], linesize, linesize, 1, 1, simple, pixel_shift);
2175
2176             for (p = 0; p < plane_count; p++)
2177                 hl_decode_mb_predict_luma(h, mb_type, 1, simple, transform_bypass, pixel_shift, block_offset, linesize, dest[p], p);
2178
2179             if(h->deblocking_filter)
2180                 xchg_mb_border(h, dest[0], dest[1], dest[2], linesize, linesize, 0, 1, simple, pixel_shift);
2181         }else{
2182             hl_motion(h, dest[0], dest[1], dest[2],
2183                       s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2184                       s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2185                       h->h264dsp.weight_h264_pixels_tab,
2186                       h->h264dsp.biweight_h264_pixels_tab, pixel_shift, 3);
2187         }
2188
2189         for (p = 0; p < plane_count; p++)
2190             hl_decode_mb_idct_luma(h, mb_type, 1, simple, transform_bypass, pixel_shift, block_offset, linesize, dest[p], p);
2191     }
2192     if(h->cbp || IS_INTRA(mb_type))
2193     {
2194         s->dsp.clear_blocks(h->mb);
2195         s->dsp.clear_blocks(h->mb+(24*16<<pixel_shift));
2196     }
2197 }
2198
2199 /**
2200  * Process a macroblock; this case avoids checks for expensive uncommon cases.
2201  */
2202 #define hl_decode_mb_simple(sh, bits) \
2203 static void hl_decode_mb_simple_ ## bits(H264Context *h){ \
2204     hl_decode_mb_internal(h, 1, sh); \
2205 }
2206 hl_decode_mb_simple(0, 8);
2207 hl_decode_mb_simple(1, 16);
2208
2209 /**
2210  * Process a macroblock; this handles edge cases, such as interlacing.
2211  */
2212 static void av_noinline hl_decode_mb_complex(H264Context *h){
2213     hl_decode_mb_internal(h, 0, h->pixel_shift);
2214 }
2215
2216 static void av_noinline hl_decode_mb_444_complex(H264Context *h){
2217     hl_decode_mb_444_internal(h, 0, h->pixel_shift);
2218 }
2219
2220 static void av_noinline hl_decode_mb_444_simple(H264Context *h){
2221     hl_decode_mb_444_internal(h, 1, 0);
2222 }
2223
2224 void ff_h264_hl_decode_mb(H264Context *h){
2225     MpegEncContext * const s = &h->s;
2226     const int mb_xy= h->mb_xy;
2227     const int mb_type = s->current_picture.f.mb_type[mb_xy];
2228     int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
2229
2230     if (CHROMA444) {
2231         if(is_complex || h->pixel_shift)
2232             hl_decode_mb_444_complex(h);
2233         else
2234             hl_decode_mb_444_simple(h);
2235     } else if (is_complex) {
2236         hl_decode_mb_complex(h);
2237     } else if (h->pixel_shift) {
2238         hl_decode_mb_simple_16(h);
2239     } else
2240         hl_decode_mb_simple_8(h);
2241 }
2242
2243 static int pred_weight_table(H264Context *h){
2244     MpegEncContext * const s = &h->s;
2245     int list, i;
2246     int luma_def, chroma_def;
2247
2248     h->use_weight= 0;
2249     h->use_weight_chroma= 0;
2250     h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
2251     if(h->sps.chroma_format_idc)
2252         h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
2253     luma_def = 1<<h->luma_log2_weight_denom;
2254     chroma_def = 1<<h->chroma_log2_weight_denom;
2255
2256     for(list=0; list<2; list++){
2257         h->luma_weight_flag[list]   = 0;
2258         h->chroma_weight_flag[list] = 0;
2259         for(i=0; i<h->ref_count[list]; i++){
2260             int luma_weight_flag, chroma_weight_flag;
2261
2262             luma_weight_flag= get_bits1(&s->gb);
2263             if(luma_weight_flag){
2264                 h->luma_weight[i][list][0]= get_se_golomb(&s->gb);
2265                 h->luma_weight[i][list][1]= get_se_golomb(&s->gb);
2266                 if(   h->luma_weight[i][list][0] != luma_def
2267                    || h->luma_weight[i][list][1] != 0) {
2268                     h->use_weight= 1;
2269                     h->luma_weight_flag[list]= 1;
2270                 }
2271             }else{
2272                 h->luma_weight[i][list][0]= luma_def;
2273                 h->luma_weight[i][list][1]= 0;
2274             }
2275
2276             if(h->sps.chroma_format_idc){
2277                 chroma_weight_flag= get_bits1(&s->gb);
2278                 if(chroma_weight_flag){
2279                     int j;
2280                     for(j=0; j<2; j++){
2281                         h->chroma_weight[i][list][j][0]= get_se_golomb(&s->gb);
2282                         h->chroma_weight[i][list][j][1]= get_se_golomb(&s->gb);
2283                         if(   h->chroma_weight[i][list][j][0] != chroma_def
2284                            || h->chroma_weight[i][list][j][1] != 0) {
2285                             h->use_weight_chroma= 1;
2286                             h->chroma_weight_flag[list]= 1;
2287                         }
2288                     }
2289                 }else{
2290                     int j;
2291                     for(j=0; j<2; j++){
2292                         h->chroma_weight[i][list][j][0]= chroma_def;
2293                         h->chroma_weight[i][list][j][1]= 0;
2294                     }
2295                 }
2296             }
2297         }
2298         if(h->slice_type_nos != AV_PICTURE_TYPE_B) break;
2299     }
2300     h->use_weight= h->use_weight || h->use_weight_chroma;
2301     return 0;
2302 }
2303
2304 /**
2305  * Initialize implicit_weight table.
2306  * @param field  0/1 initialize the weight for interlaced MBAFF
2307  *                -1 initializes the rest
2308  */
2309 static void implicit_weight_table(H264Context *h, int field){
2310     MpegEncContext * const s = &h->s;
2311     int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
2312
2313     for (i = 0; i < 2; i++) {
2314         h->luma_weight_flag[i]   = 0;
2315         h->chroma_weight_flag[i] = 0;
2316     }
2317
2318     if(field < 0){
2319         if (s->picture_structure == PICT_FRAME) {
2320             cur_poc = s->current_picture_ptr->poc;
2321         } else {
2322             cur_poc = s->current_picture_ptr->field_poc[s->picture_structure - 1];
2323         }
2324     if(   h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF
2325        && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
2326         h->use_weight= 0;
2327         h->use_weight_chroma= 0;
2328         return;
2329     }
2330         ref_start= 0;
2331         ref_count0= h->ref_count[0];
2332         ref_count1= h->ref_count[1];
2333     }else{
2334         cur_poc = s->current_picture_ptr->field_poc[field];
2335         ref_start= 16;
2336         ref_count0= 16+2*h->ref_count[0];
2337         ref_count1= 16+2*h->ref_count[1];
2338     }
2339
2340     h->use_weight= 2;
2341     h->use_weight_chroma= 2;
2342     h->luma_log2_weight_denom= 5;
2343     h->chroma_log2_weight_denom= 5;
2344
2345     for(ref0=ref_start; ref0 < ref_count0; ref0++){
2346         int poc0 = h->ref_list[0][ref0].poc;
2347         for(ref1=ref_start; ref1 < ref_count1; ref1++){
2348             int w = 32;
2349             if (!h->ref_list[0][ref0].long_ref && !h->ref_list[1][ref1].long_ref) {
2350                 int poc1 = h->ref_list[1][ref1].poc;
2351                 int td = av_clip(poc1 - poc0, -128, 127);
2352                 if(td){
2353                     int tb = av_clip(cur_poc - poc0, -128, 127);
2354                     int tx = (16384 + (FFABS(td) >> 1)) / td;
2355                     int dist_scale_factor = (tb*tx + 32) >> 8;
2356                     if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
2357                         w = 64 - dist_scale_factor;
2358                 }
2359             }
2360             if(field<0){
2361                 h->implicit_weight[ref0][ref1][0]=
2362                 h->implicit_weight[ref0][ref1][1]= w;
2363             }else{
2364                 h->implicit_weight[ref0][ref1][field]=w;
2365             }
2366         }
2367     }
2368 }
2369
2370 /**
2371  * instantaneous decoder refresh.
2372  */
2373 static void idr(H264Context *h){
2374     ff_h264_remove_all_refs(h);
2375     h->prev_frame_num= 0;
2376     h->prev_frame_num_offset= 0;
2377     h->prev_poc_msb=
2378     h->prev_poc_lsb= 0;
2379 }
2380
2381 /* forget old pics after a seek */
2382 static void flush_dpb(AVCodecContext *avctx){
2383     H264Context *h= avctx->priv_data;
2384     int i;
2385     for(i=0; i<=MAX_DELAYED_PIC_COUNT; i++) {
2386         if(h->delayed_pic[i])
2387             h->delayed_pic[i]->f.reference = 0;
2388         h->delayed_pic[i]= NULL;
2389     }
2390     h->outputed_poc=h->next_outputed_poc= INT_MIN;
2391     h->prev_interlaced_frame = 1;
2392     idr(h);
2393     if(h->s.current_picture_ptr)
2394         h->s.current_picture_ptr->f.reference = 0;
2395     h->s.first_field= 0;
2396     ff_h264_reset_sei(h);
2397     ff_mpeg_flush(avctx);
2398     h->recovery_frame= -1;
2399     h->sync= 0;
2400 }
2401
2402 static int init_poc(H264Context *h){
2403     MpegEncContext * const s = &h->s;
2404     const int max_frame_num= 1<<h->sps.log2_max_frame_num;
2405     int field_poc[2];
2406     Picture *cur = s->current_picture_ptr;
2407
2408     h->frame_num_offset= h->prev_frame_num_offset;
2409     if(h->frame_num < h->prev_frame_num)
2410         h->frame_num_offset += max_frame_num;
2411
2412     if(h->sps.poc_type==0){
2413         const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
2414
2415         if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
2416             h->poc_msb = h->prev_poc_msb + max_poc_lsb;
2417         else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
2418             h->poc_msb = h->prev_poc_msb - max_poc_lsb;
2419         else
2420             h->poc_msb = h->prev_poc_msb;
2421 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
2422         field_poc[0] =
2423         field_poc[1] = h->poc_msb + h->poc_lsb;
2424         if(s->picture_structure == PICT_FRAME)
2425             field_poc[1] += h->delta_poc_bottom;
2426     }else if(h->sps.poc_type==1){
2427         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
2428         int i;
2429
2430         if(h->sps.poc_cycle_length != 0)
2431             abs_frame_num = h->frame_num_offset + h->frame_num;
2432         else
2433             abs_frame_num = 0;
2434
2435         if(h->nal_ref_idc==0 && abs_frame_num > 0)
2436             abs_frame_num--;
2437
2438         expected_delta_per_poc_cycle = 0;
2439         for(i=0; i < h->sps.poc_cycle_length; i++)
2440             expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
2441
2442         if(abs_frame_num > 0){
2443             int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
2444             int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
2445
2446             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
2447             for(i = 0; i <= frame_num_in_poc_cycle; i++)
2448                 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
2449         } else
2450             expectedpoc = 0;
2451
2452         if(h->nal_ref_idc == 0)
2453             expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
2454
2455         field_poc[0] = expectedpoc + h->delta_poc[0];
2456         field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
2457
2458         if(s->picture_structure == PICT_FRAME)
2459             field_poc[1] += h->delta_poc[1];
2460     }else{
2461         int poc= 2*(h->frame_num_offset + h->frame_num);
2462
2463         if(!h->nal_ref_idc)
2464             poc--;
2465
2466         field_poc[0]= poc;
2467         field_poc[1]= poc;
2468     }
2469
2470     if(s->picture_structure != PICT_BOTTOM_FIELD)
2471         s->current_picture_ptr->field_poc[0]= field_poc[0];
2472     if(s->picture_structure != PICT_TOP_FIELD)
2473         s->current_picture_ptr->field_poc[1]= field_poc[1];
2474     cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
2475
2476     return 0;
2477 }
2478
2479
2480 /**
2481  * initialize scan tables
2482  */
2483 static void init_scan_tables(H264Context *h){
2484     int i;
2485     for(i=0; i<16; i++){
2486 #define T(x) (x>>2) | ((x<<2) & 0xF)
2487         h->zigzag_scan[i] = T(zigzag_scan[i]);
2488         h-> field_scan[i] = T( field_scan[i]);
2489 #undef T
2490     }
2491     for(i=0; i<64; i++){
2492 #define T(x) (x>>3) | ((x&7)<<3)
2493         h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
2494         h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
2495         h->field_scan8x8[i]        = T(field_scan8x8[i]);
2496         h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
2497 #undef T
2498     }
2499     if(h->sps.transform_bypass){ //FIXME same ugly
2500         h->zigzag_scan_q0          = zigzag_scan;
2501         h->zigzag_scan8x8_q0       = ff_zigzag_direct;
2502         h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
2503         h->field_scan_q0           = field_scan;
2504         h->field_scan8x8_q0        = field_scan8x8;
2505         h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
2506     }else{
2507         h->zigzag_scan_q0          = h->zigzag_scan;
2508         h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
2509         h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
2510         h->field_scan_q0           = h->field_scan;
2511         h->field_scan8x8_q0        = h->field_scan8x8;
2512         h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
2513     }
2514 }
2515
2516 static int field_end(H264Context *h, int in_setup){
2517     MpegEncContext * const s = &h->s;
2518     AVCodecContext * const avctx= s->avctx;
2519     int err = 0;
2520     s->mb_y= 0;
2521
2522     if (!in_setup && !s->dropable)
2523         ff_thread_report_progress((AVFrame*)s->current_picture_ptr, (16*s->mb_height >> FIELD_PICTURE) - 1,
2524                                  s->picture_structure==PICT_BOTTOM_FIELD);
2525
2526     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2527         ff_vdpau_h264_set_reference_frames(s);
2528
2529     if(in_setup || !(avctx->active_thread_type&FF_THREAD_FRAME)){
2530         if(!s->dropable) {
2531             err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
2532             h->prev_poc_msb= h->poc_msb;
2533             h->prev_poc_lsb= h->poc_lsb;
2534         }
2535         h->prev_frame_num_offset= h->frame_num_offset;
2536         h->prev_frame_num= h->frame_num;
2537         h->outputed_poc = h->next_outputed_poc;
2538     }
2539
2540     if (avctx->hwaccel) {
2541         if (avctx->hwaccel->end_frame(avctx) < 0)
2542             av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
2543     }
2544
2545     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2546         ff_vdpau_h264_picture_complete(s);
2547
2548     /*
2549      * FIXME: Error handling code does not seem to support interlaced
2550      * when slices span multiple rows
2551      * The ff_er_add_slice calls don't work right for bottom
2552      * fields; they cause massive erroneous error concealing
2553      * Error marking covers both fields (top and bottom).
2554      * This causes a mismatched s->error_count
2555      * and a bad error table. Further, the error count goes to
2556      * INT_MAX when called for bottom field, because mb_y is
2557      * past end by one (callers fault) and resync_mb_y != 0
2558      * causes problems for the first MB line, too.
2559      */
2560     if (!FIELD_PICTURE)
2561         ff_er_frame_end(s);
2562
2563     MPV_frame_end(s);
2564
2565     h->current_slice=0;
2566
2567     return err;
2568 }
2569
2570 /**
2571  * Replicate H264 "master" context to thread contexts.
2572  */
2573 static void clone_slice(H264Context *dst, H264Context *src)
2574 {
2575     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
2576     dst->s.current_picture_ptr  = src->s.current_picture_ptr;
2577     dst->s.current_picture      = src->s.current_picture;
2578     dst->s.linesize             = src->s.linesize;
2579     dst->s.uvlinesize           = src->s.uvlinesize;
2580     dst->s.first_field          = src->s.first_field;
2581
2582     dst->prev_poc_msb           = src->prev_poc_msb;
2583     dst->prev_poc_lsb           = src->prev_poc_lsb;
2584     dst->prev_frame_num_offset  = src->prev_frame_num_offset;
2585     dst->prev_frame_num         = src->prev_frame_num;
2586     dst->short_ref_count        = src->short_ref_count;
2587
2588     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
2589     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
2590     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
2591     memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
2592
2593     memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
2594     memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
2595 }
2596
2597 /**
2598  * computes profile from profile_idc and constraint_set?_flags
2599  *
2600  * @param sps SPS
2601  *
2602  * @return profile as defined by FF_PROFILE_H264_*
2603  */
2604 int ff_h264_get_profile(SPS *sps)
2605 {
2606     int profile = sps->profile_idc;
2607
2608     switch(sps->profile_idc) {
2609     case FF_PROFILE_H264_BASELINE:
2610         // constraint_set1_flag set to 1
2611         profile |= (sps->constraint_set_flags & 1<<1) ? FF_PROFILE_H264_CONSTRAINED : 0;
2612         break;
2613     case FF_PROFILE_H264_HIGH_10:
2614     case FF_PROFILE_H264_HIGH_422:
2615     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
2616         // constraint_set3_flag set to 1
2617         profile |= (sps->constraint_set_flags & 1<<3) ? FF_PROFILE_H264_INTRA : 0;
2618         break;
2619     }
2620
2621     return profile;
2622 }
2623
2624 /**
2625  * decodes a slice header.
2626  * This will also call MPV_common_init() and frame_start() as needed.
2627  *
2628  * @param h h264context
2629  * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
2630  *
2631  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
2632  */
2633 static int decode_slice_header(H264Context *h, H264Context *h0){
2634     MpegEncContext * const s = &h->s;
2635     MpegEncContext * const s0 = &h0->s;
2636     unsigned int first_mb_in_slice;
2637     unsigned int pps_id;
2638     int num_ref_idx_active_override_flag;
2639     unsigned int slice_type, tmp, i, j;
2640     int default_ref_list_done = 0;
2641     int last_pic_structure;
2642
2643     s->dropable= h->nal_ref_idc == 0;
2644
2645     /* FIXME: 2tap qpel isn't implemented for high bit depth. */
2646     if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc && !h->pixel_shift){
2647         s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
2648         s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
2649     }else{
2650         s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
2651         s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
2652     }
2653
2654     first_mb_in_slice= get_ue_golomb_long(&s->gb);
2655
2656     if(first_mb_in_slice == 0){ //FIXME better field boundary detection
2657         if(h0->current_slice && FIELD_PICTURE){
2658             field_end(h, 1);
2659         }
2660
2661         h0->current_slice = 0;
2662         if (!s0->first_field)
2663             s->current_picture_ptr= NULL;
2664     }
2665
2666     slice_type= get_ue_golomb_31(&s->gb);
2667     if(slice_type > 9){
2668         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);
2669         return -1;
2670     }
2671     if(slice_type > 4){
2672         slice_type -= 5;
2673         h->slice_type_fixed=1;
2674     }else
2675         h->slice_type_fixed=0;
2676
2677     slice_type= golomb_to_pict_type[ slice_type ];
2678     if (slice_type == AV_PICTURE_TYPE_I
2679         || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
2680         default_ref_list_done = 1;
2681     }
2682     h->slice_type= slice_type;
2683     h->slice_type_nos= slice_type & 3;
2684
2685     s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
2686
2687     pps_id= get_ue_golomb(&s->gb);
2688     if(pps_id>=MAX_PPS_COUNT){
2689         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
2690         return -1;
2691     }
2692     if(!h0->pps_buffers[pps_id]) {
2693         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
2694         return -1;
2695     }
2696     h->pps= *h0->pps_buffers[pps_id];
2697
2698     if(!h0->sps_buffers[h->pps.sps_id]) {
2699         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
2700         return -1;
2701     }
2702     h->sps = *h0->sps_buffers[h->pps.sps_id];
2703
2704     s->avctx->profile = ff_h264_get_profile(&h->sps);
2705     s->avctx->level   = h->sps.level_idc;
2706     s->avctx->refs    = h->sps.ref_frame_count;
2707
2708     if(h == h0 && h->dequant_coeff_pps != pps_id){
2709         h->dequant_coeff_pps = pps_id;
2710         init_dequant_tables(h);
2711     }
2712
2713     s->mb_width= h->sps.mb_width;
2714     s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
2715
2716     h->b_stride=  s->mb_width*4;
2717
2718     s->chroma_y_shift = h->sps.chroma_format_idc <= 1; // 400 uses yuv420p
2719
2720     s->width = 16*s->mb_width;
2721     s->height= 16*s->mb_height;
2722
2723     if (s->context_initialized
2724         && (   s->width != s->avctx->coded_width || s->height != s->avctx->coded_height
2725             || s->avctx->bits_per_raw_sample != h->sps.bit_depth_luma
2726             || h->cur_chroma_format_idc != h->sps.chroma_format_idc
2727             || av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
2728         if(h != h0) {
2729             av_log_missing_feature(s->avctx, "Width/height/bit depth/chroma idc changing with threads is", 0);
2730             return -1;   // width / height changed during parallelized decoding
2731         }
2732         free_tables(h, 0);
2733         flush_dpb(s->avctx);
2734         MPV_common_end(s);
2735         h->list_count = 0;
2736     }
2737     if (!s->context_initialized) {
2738         if (h != h0) {
2739             av_log(h->s.avctx, AV_LOG_ERROR, "Cannot (re-)initialize context during parallel decoding.\n");
2740             return -1;
2741         }
2742         avcodec_set_dimensions(s->avctx, s->width, s->height);
2743         s->avctx->width  -= (2>>CHROMA444)*FFMIN(h->sps.crop_right, (8<<CHROMA444)-1);
2744         s->avctx->height -= (1<<s->chroma_y_shift)*FFMIN(h->sps.crop_bottom, (16>>s->chroma_y_shift)-1) * (2 - h->sps.frame_mbs_only_flag);
2745         s->avctx->sample_aspect_ratio= h->sps.sar;
2746         av_assert0(s->avctx->sample_aspect_ratio.den);
2747
2748         if (s->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
2749             h->cur_chroma_format_idc != h->sps.chroma_format_idc) {
2750             if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 10 &&
2751                 (h->sps.bit_depth_luma != 9 || !CHROMA422)) {
2752                 s->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
2753                 h->cur_chroma_format_idc = h->sps.chroma_format_idc;
2754                 h->pixel_shift = h->sps.bit_depth_luma > 8;
2755
2756                 ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma, h->sps.chroma_format_idc);
2757                 ff_h264_pred_init(&h->hpc, s->codec_id, h->sps.bit_depth_luma, h->sps.chroma_format_idc);
2758                 s->dsp.dct_bits = h->sps.bit_depth_luma > 8 ? 32 : 16;
2759                 dsputil_init(&s->dsp, s->avctx);
2760             } else {
2761                 av_log(s->avctx, AV_LOG_ERROR, "Unsupported bit depth: %d chroma_idc: %d\n",
2762                        h->sps.bit_depth_luma, h->sps.chroma_format_idc);
2763                 return -1;
2764             }
2765         }
2766
2767         if(h->sps.video_signal_type_present_flag){
2768             s->avctx->color_range = h->sps.full_range>0 ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
2769             if(h->sps.colour_description_present_flag){
2770                 s->avctx->color_primaries = h->sps.color_primaries;
2771                 s->avctx->color_trc       = h->sps.color_trc;
2772                 s->avctx->colorspace      = h->sps.colorspace;
2773             }
2774         }
2775
2776         if(h->sps.timing_info_present_flag){
2777             int64_t den= h->sps.time_scale;
2778             if(h->x264_build < 44U)
2779                 den *= 2;
2780             av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
2781                       h->sps.num_units_in_tick, den, 1<<30);
2782         }
2783
2784         switch (h->sps.bit_depth_luma) {
2785             case 9 :
2786                 if (CHROMA444)
2787                     s->avctx->pix_fmt = PIX_FMT_YUV444P9;
2788                 else if (CHROMA422)
2789                     s->avctx->pix_fmt = PIX_FMT_YUV422P9;
2790                 else
2791                     s->avctx->pix_fmt = PIX_FMT_YUV420P9;
2792                 break;
2793             case 10 :
2794                 if (CHROMA444)
2795                     s->avctx->pix_fmt = PIX_FMT_YUV444P10;
2796                 else if (CHROMA422)
2797                     s->avctx->pix_fmt = PIX_FMT_YUV422P10;
2798                 else
2799                     s->avctx->pix_fmt = PIX_FMT_YUV420P10;
2800                 break;
2801             default:
2802                 if (CHROMA444){
2803                     s->avctx->pix_fmt = s->avctx->color_range == AVCOL_RANGE_JPEG ? PIX_FMT_YUVJ444P : PIX_FMT_YUV444P;
2804                     if (s->avctx->colorspace == AVCOL_SPC_RGB) {
2805                        s->avctx->pix_fmt = PIX_FMT_GBR24P;
2806                        av_log(h->s.avctx, AV_LOG_DEBUG, "Detected GBR colorspace.\n");
2807                     } else if (s->avctx->colorspace == AVCOL_SPC_YCGCO) {
2808                         av_log(h->s.avctx, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
2809                     }
2810                 } else if (CHROMA422) {
2811                     s->avctx->pix_fmt = s->avctx->color_range == AVCOL_RANGE_JPEG ? PIX_FMT_YUVJ422P : PIX_FMT_YUV422P;
2812                 }else{
2813                     s->avctx->pix_fmt = s->avctx->get_format(s->avctx,
2814                                                              s->avctx->codec->pix_fmts ?
2815                                                              s->avctx->codec->pix_fmts :
2816                                                              s->avctx->color_range == AVCOL_RANGE_JPEG ?
2817                                                              hwaccel_pixfmt_list_h264_jpeg_420 :
2818                                                              ff_hwaccel_pixfmt_list_420);
2819                 }
2820         }
2821
2822         s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
2823
2824         if (MPV_common_init(s) < 0) {
2825             av_log(h->s.avctx, AV_LOG_ERROR, "MPV_common_init() failed.\n");
2826             return -1;
2827         }
2828         s->first_field = 0;
2829         h->prev_interlaced_frame = 1;
2830
2831         init_scan_tables(h);
2832         if (ff_h264_alloc_tables(h) < 0) {
2833             av_log(h->s.avctx, AV_LOG_ERROR, "Could not allocate memory for h264\n");
2834             return AVERROR(ENOMEM);
2835         }
2836
2837         if (!HAVE_THREADS || !(s->avctx->active_thread_type&FF_THREAD_SLICE)) {
2838             if (context_init(h) < 0) {
2839                 av_log(h->s.avctx, AV_LOG_ERROR, "context_init() failed.\n");
2840                 return -1;
2841             }
2842         } else {
2843             for(i = 1; i < s->avctx->thread_count; i++) {
2844                 H264Context *c;
2845                 c = h->thread_context[i] = av_malloc(sizeof(H264Context));
2846                 memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
2847                 memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
2848                 c->h264dsp = h->h264dsp;
2849                 c->sps = h->sps;
2850                 c->pps = h->pps;
2851                 c->pixel_shift = h->pixel_shift;
2852                 init_scan_tables(c);
2853                 clone_tables(c, h, i);
2854             }
2855
2856             for(i = 0; i < s->avctx->thread_count; i++)
2857                 if (context_init(h->thread_context[i]) < 0) {
2858                     av_log(h->s.avctx, AV_LOG_ERROR, "context_init() failed.\n");
2859                     return -1;
2860                 }
2861         }
2862     }
2863
2864     h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
2865
2866     h->mb_mbaff = 0;
2867     h->mb_aff_frame = 0;
2868     last_pic_structure = s0->picture_structure;
2869     if(h->sps.frame_mbs_only_flag){
2870         s->picture_structure= PICT_FRAME;
2871     }else{
2872         if(!h->sps.direct_8x8_inference_flag && slice_type == AV_PICTURE_TYPE_B){
2873             av_log(h->s.avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
2874             return -1;
2875         }
2876         if(get_bits1(&s->gb)) { //field_pic_flag
2877             s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
2878         } else {
2879             s->picture_structure= PICT_FRAME;
2880             h->mb_aff_frame = h->sps.mb_aff;
2881         }
2882     }
2883     h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
2884
2885     if(h0->current_slice == 0){
2886         // Shorten frame num gaps so we don't have to allocate reference frames just to throw them away
2887         if(h->frame_num != h->prev_frame_num) {
2888             int unwrap_prev_frame_num = h->prev_frame_num, max_frame_num = 1<<h->sps.log2_max_frame_num;
2889
2890             if (unwrap_prev_frame_num > h->frame_num) unwrap_prev_frame_num -= max_frame_num;
2891
2892             if ((h->frame_num - unwrap_prev_frame_num) > h->sps.ref_frame_count) {
2893                 unwrap_prev_frame_num = (h->frame_num - h->sps.ref_frame_count) - 1;
2894                 if (unwrap_prev_frame_num < 0)
2895                     unwrap_prev_frame_num += max_frame_num;
2896
2897                 h->prev_frame_num = unwrap_prev_frame_num;
2898             }
2899         }
2900
2901         while(h->frame_num !=  h->prev_frame_num &&
2902               h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
2903             Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
2904             av_log(h->s.avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
2905             if (ff_h264_frame_start(h) < 0)
2906                 return -1;
2907             h->prev_frame_num++;
2908             h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
2909             s->current_picture_ptr->frame_num= h->prev_frame_num;
2910             ff_thread_report_progress((AVFrame*)s->current_picture_ptr, INT_MAX, 0);
2911             ff_thread_report_progress((AVFrame*)s->current_picture_ptr, INT_MAX, 1);
2912             ff_generate_sliding_window_mmcos(h);
2913             if (ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index) < 0 &&
2914                 (s->avctx->err_recognition & AV_EF_EXPLODE))
2915                 return AVERROR_INVALIDDATA;
2916             /* Error concealment: if a ref is missing, copy the previous ref in its place.
2917              * FIXME: avoiding a memcpy would be nice, but ref handling makes many assumptions
2918              * about there being no actual duplicates.
2919              * FIXME: this doesn't copy padding for out-of-frame motion vectors.  Given we're
2920              * concealing a lost frame, this probably isn't noticable by comparison, but it should
2921              * be fixed. */
2922             if (h->short_ref_count) {
2923                 if (prev) {
2924                     av_image_copy(h->short_ref[0]->f.data, h->short_ref[0]->f.linesize,
2925                                   (const uint8_t**)prev->f.data, prev->f.linesize,
2926                                   s->avctx->pix_fmt, s->mb_width*16, s->mb_height*16);
2927                     h->short_ref[0]->poc = prev->poc+2;
2928                 }
2929                 h->short_ref[0]->frame_num = h->prev_frame_num;
2930             }
2931         }
2932
2933         /* See if we have a decoded first field looking for a pair... */
2934         if (s0->first_field) {
2935             assert(s0->current_picture_ptr);
2936             assert(s0->current_picture_ptr->f.data[0]);
2937             assert(s0->current_picture_ptr->f.reference != DELAYED_PIC_REF);
2938
2939             /* figure out if we have a complementary field pair */
2940             if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
2941                 /*
2942                  * Previous field is unmatched. Don't display it, but let it
2943                  * remain for reference if marked as such.
2944                  */
2945                 s0->current_picture_ptr = NULL;
2946                 s0->first_field = FIELD_PICTURE;
2947
2948             } else {
2949                 if (h->nal_ref_idc &&
2950                         s0->current_picture_ptr->f.reference &&
2951                         s0->current_picture_ptr->frame_num != h->frame_num) {
2952                     /*
2953                      * This and previous field were reference, but had
2954                      * different frame_nums. Consider this field first in
2955                      * pair. Throw away previous field except for reference
2956                      * purposes.
2957                      */
2958                     s0->first_field = 1;
2959                     s0->current_picture_ptr = NULL;
2960
2961                 } else {
2962                     /* Second field in complementary pair */
2963                     s0->first_field = 0;
2964                 }
2965             }
2966
2967         } else {
2968             /* Frame or first field in a potentially complementary pair */
2969             assert(!s0->current_picture_ptr);
2970             s0->first_field = FIELD_PICTURE;
2971         }
2972
2973         if(!FIELD_PICTURE || s0->first_field) {
2974             if (ff_h264_frame_start(h) < 0) {
2975                 s0->first_field = 0;
2976                 return -1;
2977             }
2978         } else {
2979             ff_release_unused_pictures(s, 0);
2980         }
2981     }
2982     if(h != h0)
2983         clone_slice(h, h0);
2984
2985     s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
2986
2987     assert(s->mb_num == s->mb_width * s->mb_height);
2988     if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
2989        first_mb_in_slice                    >= s->mb_num){
2990         av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
2991         return -1;
2992     }
2993     s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
2994     s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
2995     if (s->picture_structure == PICT_BOTTOM_FIELD)
2996         s->resync_mb_y = s->mb_y = s->mb_y + 1;
2997     assert(s->mb_y < s->mb_height);
2998
2999     if(s->picture_structure==PICT_FRAME){
3000         h->curr_pic_num=   h->frame_num;
3001         h->max_pic_num= 1<< h->sps.log2_max_frame_num;
3002     }else{
3003         h->curr_pic_num= 2*h->frame_num + 1;
3004         h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
3005     }
3006
3007     if(h->nal_unit_type == NAL_IDR_SLICE){
3008         get_ue_golomb(&s->gb); /* idr_pic_id */
3009     }
3010
3011     if(h->sps.poc_type==0){
3012         h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
3013
3014         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
3015             h->delta_poc_bottom= get_se_golomb(&s->gb);
3016         }
3017     }
3018
3019     if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
3020         h->delta_poc[0]= get_se_golomb(&s->gb);
3021
3022         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
3023             h->delta_poc[1]= get_se_golomb(&s->gb);
3024     }
3025
3026     init_poc(h);
3027
3028     if(h->pps.redundant_pic_cnt_present){
3029         h->redundant_pic_count= get_ue_golomb(&s->gb);
3030     }
3031
3032     //set defaults, might be overridden a few lines later
3033     h->ref_count[0]= h->pps.ref_count[0];
3034     h->ref_count[1]= h->pps.ref_count[1];
3035
3036     if(h->slice_type_nos != AV_PICTURE_TYPE_I){
3037         unsigned max= (16<<(s->picture_structure != PICT_FRAME))-1;
3038         if(h->slice_type_nos == AV_PICTURE_TYPE_B){
3039             h->direct_spatial_mv_pred= get_bits1(&s->gb);
3040         }
3041         num_ref_idx_active_override_flag= get_bits1(&s->gb);
3042
3043         if(num_ref_idx_active_override_flag){
3044             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
3045             if(h->slice_type_nos==AV_PICTURE_TYPE_B)
3046                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
3047
3048         }
3049         if(h->ref_count[0]-1 > max || h->ref_count[1]-1 > max){
3050             av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
3051             h->ref_count[0]= h->ref_count[1]= 1;
3052             return -1;
3053         }
3054         if(h->slice_type_nos == AV_PICTURE_TYPE_B)
3055             h->list_count= 2;
3056         else
3057             h->list_count= 1;
3058     }else
3059         h->ref_count[1]= h->ref_count[0]= h->list_count= 0;
3060
3061     if(!default_ref_list_done){
3062         ff_h264_fill_default_ref_list(h);
3063     }
3064
3065     if(h->slice_type_nos!=AV_PICTURE_TYPE_I && ff_h264_decode_ref_pic_list_reordering(h) < 0) {
3066         h->ref_count[1]= h->ref_count[0]= 0;
3067         return -1;
3068     }
3069
3070     if(h->slice_type_nos!=AV_PICTURE_TYPE_I){
3071         s->last_picture_ptr= &h->ref_list[0][0];
3072         ff_copy_picture(&s->last_picture, s->last_picture_ptr);
3073     }
3074     if(h->slice_type_nos==AV_PICTURE_TYPE_B){
3075         s->next_picture_ptr= &h->ref_list[1][0];
3076         ff_copy_picture(&s->next_picture, s->next_picture_ptr);
3077     }
3078
3079     if(   (h->pps.weighted_pred          && h->slice_type_nos == AV_PICTURE_TYPE_P )
3080        ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== AV_PICTURE_TYPE_B ) )
3081         pred_weight_table(h);
3082     else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== AV_PICTURE_TYPE_B){
3083         implicit_weight_table(h, -1);
3084     }else {
3085         h->use_weight = 0;
3086         for (i = 0; i < 2; i++) {
3087             h->luma_weight_flag[i]   = 0;
3088             h->chroma_weight_flag[i] = 0;
3089         }
3090     }
3091
3092     if(h->nal_ref_idc && ff_h264_decode_ref_pic_marking(h0, &s->gb) < 0 &&
3093        (s->avctx->err_recognition & AV_EF_EXPLODE))
3094         return AVERROR_INVALIDDATA;
3095
3096     if(FRAME_MBAFF){
3097         ff_h264_fill_mbaff_ref_list(h);
3098
3099         if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== AV_PICTURE_TYPE_B){
3100             implicit_weight_table(h, 0);
3101             implicit_weight_table(h, 1);
3102         }
3103     }
3104
3105     if(h->slice_type_nos==AV_PICTURE_TYPE_B && !h->direct_spatial_mv_pred)
3106         ff_h264_direct_dist_scale_factor(h);
3107     ff_h264_direct_ref_list_init(h);
3108
3109     if( h->slice_type_nos != AV_PICTURE_TYPE_I && h->pps.cabac ){
3110         tmp = get_ue_golomb_31(&s->gb);
3111         if(tmp > 2){
3112             av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
3113             return -1;
3114         }
3115         h->cabac_init_idc= tmp;
3116     }
3117
3118     h->last_qscale_diff = 0;
3119     tmp = h->pps.init_qp + get_se_golomb(&s->gb);
3120     if(tmp>51+6*(h->sps.bit_depth_luma-8)){
3121         av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
3122         return -1;
3123     }
3124     s->qscale= tmp;
3125     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3126     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3127     //FIXME qscale / qp ... stuff
3128     if(h->slice_type == AV_PICTURE_TYPE_SP){
3129         get_bits1(&s->gb); /* sp_for_switch_flag */
3130     }
3131     if(h->slice_type==AV_PICTURE_TYPE_SP || h->slice_type == AV_PICTURE_TYPE_SI){
3132         get_se_golomb(&s->gb); /* slice_qs_delta */
3133     }
3134
3135     h->deblocking_filter = 1;
3136     h->slice_alpha_c0_offset = 52;
3137     h->slice_beta_offset = 52;
3138     if( h->pps.deblocking_filter_parameters_present ) {
3139         tmp= get_ue_golomb_31(&s->gb);
3140         if(tmp > 2){
3141             av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
3142             return -1;
3143         }
3144         h->deblocking_filter= tmp;
3145         if(h->deblocking_filter < 2)
3146             h->deblocking_filter^= 1; // 1<->0
3147
3148         if( h->deblocking_filter ) {
3149             h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
3150             h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
3151             if(   h->slice_alpha_c0_offset > 104U
3152                || h->slice_beta_offset     > 104U){
3153                 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);
3154                 return -1;
3155             }
3156         }
3157     }
3158
3159     if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
3160        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != AV_PICTURE_TYPE_I)
3161        ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == AV_PICTURE_TYPE_B)
3162        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
3163         h->deblocking_filter= 0;
3164
3165     if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
3166         if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
3167             /* Cheat slightly for speed:
3168                Do not bother to deblock across slices. */
3169             h->deblocking_filter = 2;
3170         } else {
3171             h0->max_contexts = 1;
3172             if(!h0->single_decode_warning) {
3173                 av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
3174                 h0->single_decode_warning = 1;
3175             }
3176             if (h != h0) {
3177                 av_log(h->s.avctx, AV_LOG_ERROR, "Deblocking switched inside frame.\n");
3178                 return 1;
3179             }
3180         }
3181     }
3182     h->qp_thresh = 15 + 52 - FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset)
3183                  - FFMAX3(0, h->pps.chroma_qp_index_offset[0], h->pps.chroma_qp_index_offset[1])
3184                  + 6 * (h->sps.bit_depth_luma - 8);
3185
3186 #if 0 //FMO
3187     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
3188         slice_group_change_cycle= get_bits(&s->gb, ?);
3189 #endif
3190
3191     h0->last_slice_type = slice_type;
3192     h->slice_num = ++h0->current_slice;
3193
3194     if(h->slice_num)
3195         h0->slice_row[(h->slice_num-1)&(MAX_SLICES-1)]= s->resync_mb_y;
3196     if (   h0->slice_row[h->slice_num&(MAX_SLICES-1)] + 3 >= s->resync_mb_y
3197         && h0->slice_row[h->slice_num&(MAX_SLICES-1)] <= s->resync_mb_y
3198         && h->slice_num >= MAX_SLICES) {
3199         //in case of ASO this check needs to be updated depending on how we decide to assign slice numbers in this case
3200         av_log(s->avctx, AV_LOG_WARNING, "Possibly too many slices (%d >= %d), increase MAX_SLICES and recompile if there are artifacts\n", h->slice_num, MAX_SLICES);
3201     }
3202
3203     for(j=0; j<2; j++){
3204         int id_list[16];
3205         int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
3206         for(i=0; i<16; i++){
3207             id_list[i]= 60;
3208             if (h->ref_list[j][i].f.data[0]) {
3209                 int k;
3210                 uint8_t *base = h->ref_list[j][i].f.base[0];
3211                 for(k=0; k<h->short_ref_count; k++)
3212                     if (h->short_ref[k]->f.base[0] == base) {
3213                         id_list[i]= k;
3214                         break;
3215                     }
3216                 for(k=0; k<h->long_ref_count; k++)
3217                     if (h->long_ref[k] && h->long_ref[k]->f.base[0] == base) {
3218                         id_list[i]= h->short_ref_count + k;
3219                         break;
3220                     }
3221             }
3222         }
3223
3224         ref2frm[0]=
3225         ref2frm[1]= -1;
3226         for(i=0; i<16; i++)
3227             ref2frm[i+2]= 4*id_list[i]
3228                           + (h->ref_list[j][i].f.reference & 3);
3229         ref2frm[18+0]=
3230         ref2frm[18+1]= -1;
3231         for(i=16; i<48; i++)
3232             ref2frm[i+4]= 4*id_list[(i-16)>>1]
3233                           + (h->ref_list[j][i].f.reference & 3);
3234     }
3235
3236     //FIXME: fix draw_edges+PAFF+frame threads
3237     h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE || (!h->sps.frame_mbs_only_flag && s->avctx->active_thread_type)) ? 0 : 16;
3238     h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
3239
3240     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
3241         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",
3242                h->slice_num,
3243                (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
3244                first_mb_in_slice,
3245                av_get_picture_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
3246                pps_id, h->frame_num,
3247                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
3248                h->ref_count[0], h->ref_count[1],
3249                s->qscale,
3250                h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
3251                h->use_weight,
3252                h->use_weight==1 && h->use_weight_chroma ? "c" : "",
3253                h->slice_type == AV_PICTURE_TYPE_B ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
3254                );
3255     }
3256
3257     return 0;
3258 }
3259
3260 int ff_h264_get_slice_type(const H264Context *h)
3261 {
3262     switch (h->slice_type) {
3263     case AV_PICTURE_TYPE_P:  return 0;
3264     case AV_PICTURE_TYPE_B:  return 1;
3265     case AV_PICTURE_TYPE_I:  return 2;
3266     case AV_PICTURE_TYPE_SP: return 3;
3267     case AV_PICTURE_TYPE_SI: return 4;
3268     default:         return -1;
3269     }
3270 }
3271
3272 static av_always_inline void fill_filter_caches_inter(H264Context *h, MpegEncContext * const s, int mb_type, int top_xy,
3273                                                       int left_xy[LEFT_MBS], int top_type, int left_type[LEFT_MBS], int mb_xy, int list)
3274 {
3275     int b_stride = h->b_stride;
3276     int16_t (*mv_dst)[2] = &h->mv_cache[list][scan8[0]];
3277     int8_t *ref_cache = &h->ref_cache[list][scan8[0]];
3278     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
3279         if(USES_LIST(top_type, list)){
3280             const int b_xy= h->mb2b_xy[top_xy] + 3*b_stride;
3281             const int b8_xy= 4*top_xy + 2;
3282             int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
3283             AV_COPY128(mv_dst - 1*8, s->current_picture.f.motion_val[list][b_xy + 0]);
3284             ref_cache[0 - 1*8]=
3285             ref_cache[1 - 1*8]= ref2frm[list][s->current_picture.f.ref_index[list][b8_xy + 0]];
3286             ref_cache[2 - 1*8]=
3287             ref_cache[3 - 1*8]= ref2frm[list][s->current_picture.f.ref_index[list][b8_xy + 1]];
3288         }else{
3289             AV_ZERO128(mv_dst - 1*8);
3290             AV_WN32A(&ref_cache[0 - 1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3291         }
3292
3293         if(!IS_INTERLACED(mb_type^left_type[LTOP])){
3294             if(USES_LIST(left_type[LTOP], list)){
3295                 const int b_xy= h->mb2b_xy[left_xy[LTOP]] + 3;
3296                 const int b8_xy= 4*left_xy[LTOP] + 1;
3297                 int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[LTOP]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
3298                 AV_COPY32(mv_dst - 1 +  0, s->current_picture.f.motion_val[list][b_xy + b_stride*0]);
3299                 AV_COPY32(mv_dst - 1 +  8, s->current_picture.f.motion_val[list][b_xy + b_stride*1]);
3300                 AV_COPY32(mv_dst - 1 + 16, s->current_picture.f.motion_val[list][b_xy + b_stride*2]);
3301                 AV_COPY32(mv_dst - 1 + 24, s->current_picture.f.motion_val[list][b_xy + b_stride*3]);
3302                 ref_cache[-1 +  0]=
3303                 ref_cache[-1 +  8]= ref2frm[list][s->current_picture.f.ref_index[list][b8_xy + 2*0]];
3304                 ref_cache[-1 + 16]=
3305                 ref_cache[-1 + 24]= ref2frm[list][s->current_picture.f.ref_index[list][b8_xy + 2*1]];
3306             }else{
3307                 AV_ZERO32(mv_dst - 1 + 0);
3308                 AV_ZERO32(mv_dst - 1 + 8);
3309                 AV_ZERO32(mv_dst - 1 +16);
3310                 AV_ZERO32(mv_dst - 1 +24);
3311                 ref_cache[-1 +  0]=
3312                 ref_cache[-1 +  8]=
3313                 ref_cache[-1 + 16]=
3314                 ref_cache[-1 + 24]= LIST_NOT_USED;
3315             }
3316         }
3317     }
3318
3319     if(!USES_LIST(mb_type, list)){
3320         fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0,0), 4);
3321         AV_WN32A(&ref_cache[0*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3322         AV_WN32A(&ref_cache[1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3323         AV_WN32A(&ref_cache[2*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3324         AV_WN32A(&ref_cache[3*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3325         return;
3326     }
3327
3328     {
3329         int8_t *ref = &s->current_picture.f.ref_index[list][4*mb_xy];
3330         int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
3331         uint32_t ref01 = (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101;
3332         uint32_t ref23 = (pack16to32(ref2frm[list][ref[2]],ref2frm[list][ref[3]])&0x00FF00FF)*0x0101;
3333         AV_WN32A(&ref_cache[0*8], ref01);
3334         AV_WN32A(&ref_cache[1*8], ref01);
3335         AV_WN32A(&ref_cache[2*8], ref23);
3336         AV_WN32A(&ref_cache[3*8], ref23);
3337     }
3338
3339     {
3340         int16_t (*mv_src)[2] = &s->current_picture.f.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
3341         AV_COPY128(mv_dst + 8*0, mv_src + 0*b_stride);
3342         AV_COPY128(mv_dst + 8*1, mv_src + 1*b_stride);
3343         AV_COPY128(mv_dst + 8*2, mv_src + 2*b_stride);
3344         AV_COPY128(mv_dst + 8*3, mv_src + 3*b_stride);
3345     }
3346 }
3347
3348 /**
3349  *
3350  * @return non zero if the loop filter can be skiped
3351  */
3352 static int fill_filter_caches(H264Context *h, int mb_type){
3353     MpegEncContext * const s = &h->s;
3354     const int mb_xy= h->mb_xy;
3355     int top_xy, left_xy[LEFT_MBS];
3356     int top_type, left_type[LEFT_MBS];
3357     uint8_t *nnz;
3358     uint8_t *nnz_cache;
3359
3360     top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
3361
3362     /* Wow, what a mess, why didn't they simplify the interlacing & intra
3363      * stuff, I can't imagine that these complex rules are worth it. */
3364
3365     left_xy[LBOT] = left_xy[LTOP] = mb_xy-1;
3366     if(FRAME_MBAFF){
3367         const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.f.mb_type[mb_xy - 1]);
3368         const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
3369         if(s->mb_y&1){
3370             if (left_mb_field_flag != curr_mb_field_flag) {
3371                 left_xy[LTOP] -= s->mb_stride;
3372             }
3373         }else{
3374             if(curr_mb_field_flag){
3375                 top_xy += s->mb_stride & (((s->current_picture.f.mb_type[top_xy] >> 7) & 1) - 1);
3376             }
3377             if (left_mb_field_flag != curr_mb_field_flag) {
3378                 left_xy[LBOT] += s->mb_stride;
3379             }
3380         }
3381     }
3382
3383     h->top_mb_xy = top_xy;
3384     h->left_mb_xy[LTOP] = left_xy[LTOP];
3385     h->left_mb_xy[LBOT] = left_xy[LBOT];
3386     {
3387         //for sufficiently low qp, filtering wouldn't do anything
3388         //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
3389         int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
3390         int qp = s->current_picture.f.qscale_table[mb_xy];
3391         if(qp <= qp_thresh
3392            && (left_xy[LTOP] < 0 || ((qp + s->current_picture.f.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh)
3393            && (top_xy        < 0 || ((qp + s->current_picture.f.qscale_table[top_xy       ] + 1) >> 1) <= qp_thresh)) {
3394             if(!FRAME_MBAFF)
3395                 return 1;
3396             if ((left_xy[LTOP] < 0            || ((qp + s->current_picture.f.qscale_table[left_xy[LBOT]        ] + 1) >> 1) <= qp_thresh) &&
3397                 (top_xy        < s->mb_stride || ((qp + s->current_picture.f.qscale_table[top_xy - s->mb_stride] + 1) >> 1) <= qp_thresh))
3398                 return 1;
3399         }
3400     }
3401
3402     top_type        = s->current_picture.f.mb_type[top_xy];
3403     left_type[LTOP] = s->current_picture.f.mb_type[left_xy[LTOP]];
3404     left_type[LBOT] = s->current_picture.f.mb_type[left_xy[LBOT]];
3405     if(h->deblocking_filter == 2){
3406         if(h->slice_table[top_xy       ] != h->slice_num) top_type= 0;
3407         if(h->slice_table[left_xy[LBOT]] != h->slice_num) left_type[LTOP]= left_type[LBOT]= 0;
3408     }else{
3409         if(h->slice_table[top_xy       ] == 0xFFFF) top_type= 0;
3410         if(h->slice_table[left_xy[LBOT]] == 0xFFFF) left_type[LTOP]= left_type[LBOT] =0;
3411     }
3412     h->top_type       = top_type;
3413     h->left_type[LTOP]= left_type[LTOP];
3414     h->left_type[LBOT]= left_type[LBOT];
3415
3416     if(IS_INTRA(mb_type))
3417         return 0;
3418
3419     fill_filter_caches_inter(h, s, mb_type, top_xy, left_xy, top_type, left_type, mb_xy, 0);
3420     if(h->list_count == 2)
3421         fill_filter_caches_inter(h, s, mb_type, top_xy, left_xy, top_type, left_type, mb_xy, 1);
3422
3423     nnz = h->non_zero_count[mb_xy];
3424     nnz_cache = h->non_zero_count_cache;
3425     AV_COPY32(&nnz_cache[4+8*1], &nnz[ 0]);
3426     AV_COPY32(&nnz_cache[4+8*2], &nnz[ 4]);
3427     AV_COPY32(&nnz_cache[4+8*3], &nnz[ 8]);
3428     AV_COPY32(&nnz_cache[4+8*4], &nnz[12]);
3429     h->cbp= h->cbp_table[mb_xy];
3430
3431     if(top_type){
3432         nnz = h->non_zero_count[top_xy];
3433         AV_COPY32(&nnz_cache[4+8*0], &nnz[3*4]);
3434     }
3435
3436     if(left_type[LTOP]){
3437         nnz = h->non_zero_count[left_xy[LTOP]];
3438         nnz_cache[3+8*1]= nnz[3+0*4];
3439         nnz_cache[3+8*2]= nnz[3+1*4];
3440         nnz_cache[3+8*3]= nnz[3+2*4];
3441         nnz_cache[3+8*4]= nnz[3+3*4];
3442     }
3443
3444     // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
3445     if(!CABAC && h->pps.transform_8x8_mode){
3446         if(IS_8x8DCT(top_type)){
3447             nnz_cache[4+8*0]=
3448             nnz_cache[5+8*0]= (h->cbp_table[top_xy] & 0x4000) >> 12;
3449             nnz_cache[6+8*0]=
3450             nnz_cache[7+8*0]= (h->cbp_table[top_xy] & 0x8000) >> 12;
3451         }
3452         if(IS_8x8DCT(left_type[LTOP])){
3453             nnz_cache[3+8*1]=
3454             nnz_cache[3+8*2]= (h->cbp_table[left_xy[LTOP]]&0x2000) >> 12; //FIXME check MBAFF
3455         }
3456         if(IS_8x8DCT(left_type[LBOT])){
3457             nnz_cache[3+8*3]=
3458             nnz_cache[3+8*4]= (h->cbp_table[left_xy[LBOT]]&0x8000) >> 12; //FIXME check MBAFF
3459         }
3460
3461         if(IS_8x8DCT(mb_type)){
3462             nnz_cache[scan8[0   ]]= nnz_cache[scan8[1   ]]=
3463             nnz_cache[scan8[2   ]]= nnz_cache[scan8[3   ]]= (h->cbp & 0x1000) >> 12;
3464
3465             nnz_cache[scan8[0+ 4]]= nnz_cache[scan8[1+ 4]]=
3466             nnz_cache[scan8[2+ 4]]= nnz_cache[scan8[3+ 4]]= (h->cbp & 0x2000) >> 12;
3467
3468             nnz_cache[scan8[0+ 8]]= nnz_cache[scan8[1+ 8]]=
3469             nnz_cache[scan8[2+ 8]]= nnz_cache[scan8[3+ 8]]= (h->cbp & 0x4000) >> 12;
3470
3471             nnz_cache[scan8[0+12]]= nnz_cache[scan8[1+12]]=
3472             nnz_cache[scan8[2+12]]= nnz_cache[scan8[3+12]]= (h->cbp & 0x8000) >> 12;
3473         }
3474     }
3475
3476     return 0;
3477 }
3478
3479 static void loop_filter(H264Context *h, int start_x, int end_x){
3480     MpegEncContext * const s = &h->s;
3481     uint8_t  *dest_y, *dest_cb, *dest_cr;
3482     int linesize, uvlinesize, mb_x, mb_y;
3483     const int end_mb_y= s->mb_y + FRAME_MBAFF;
3484     const int old_slice_type= h->slice_type;
3485     const int pixel_shift = h->pixel_shift;
3486     const int block_h = 16 >> s->chroma_y_shift;
3487
3488     if(h->deblocking_filter) {
3489         for(mb_x= start_x; mb_x<end_x; mb_x++){
3490             for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
3491                 int mb_xy, mb_type;
3492                 mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
3493                 h->slice_num= h->slice_table[mb_xy];
3494                 mb_type = s->current_picture.f.mb_type[mb_xy];
3495                 h->list_count= h->list_counts[mb_xy];
3496
3497                 if(FRAME_MBAFF)
3498                     h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
3499
3500                 s->mb_x= mb_x;
3501                 s->mb_y= mb_y;
3502                 dest_y  = s->current_picture.f.data[0] + ((mb_x << pixel_shift) + mb_y * s->linesize  ) * 16;
3503                 dest_cb = s->current_picture.f.data[1] + (mb_x << pixel_shift) * (8 << CHROMA444) + mb_y * s->uvlinesize * block_h;
3504                 dest_cr = s->current_picture.f.data[2] + (mb_x << pixel_shift) * (8 << CHROMA444) + mb_y * s->uvlinesize * block_h;
3505                     //FIXME simplify above
3506
3507                 if (MB_FIELD) {
3508                     linesize   = h->mb_linesize   = s->linesize * 2;
3509                     uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
3510                     if(mb_y&1){ //FIXME move out of this function?
3511                         dest_y -= s->linesize*15;
3512                         dest_cb-= s->uvlinesize * (block_h - 1);
3513                         dest_cr-= s->uvlinesize * (block_h - 1);
3514                     }
3515                 } else {
3516                     linesize   = h->mb_linesize   = s->linesize;
3517                     uvlinesize = h->mb_uvlinesize = s->uvlinesize;
3518                 }
3519                 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
3520                 if(fill_filter_caches(h, mb_type))
3521                     continue;
3522                 h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.f.qscale_table[mb_xy]);
3523                 h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.f.qscale_table[mb_xy]);
3524
3525                 if (FRAME_MBAFF) {
3526                     ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
3527                 } else {
3528                     ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
3529                 }
3530             }
3531         }
3532     }
3533     h->slice_type= old_slice_type;
3534     s->mb_x= end_x;
3535     s->mb_y= end_mb_y - FRAME_MBAFF;
3536     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3537     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3538 }
3539
3540 static void predict_field_decoding_flag(H264Context *h){
3541     MpegEncContext * const s = &h->s;
3542     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
3543     int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
3544                 ? s->current_picture.f.mb_type[mb_xy - 1]
3545                 : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
3546                 ? s->current_picture.f.mb_type[mb_xy - s->mb_stride]
3547                 : 0;
3548     h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
3549 }
3550
3551 /**
3552  * Draw edges and report progress for the last MB row.
3553  */
3554 static void decode_finish_row(H264Context *h){
3555     MpegEncContext * const s = &h->s;
3556     int top = 16*(s->mb_y >> FIELD_PICTURE);
3557     int height = 16 << FRAME_MBAFF;
3558     int deblock_border = (16 + 4) << FRAME_MBAFF;
3559     int pic_height = 16*s->mb_height >> FIELD_PICTURE;
3560
3561     if (h->deblocking_filter) {
3562         if((top + height) >= pic_height)
3563             height += deblock_border;
3564
3565         top -= deblock_border;
3566     }
3567
3568     if (top >= pic_height || (top + height) < h->emu_edge_height)
3569         return;
3570
3571     height = FFMIN(height, pic_height - top);
3572     if (top < h->emu_edge_height) {
3573         height = top+height;
3574         top = 0;
3575     }
3576
3577     ff_draw_horiz_band(s, top, height);
3578
3579     if (s->dropable) return;
3580
3581     ff_thread_report_progress((AVFrame*)s->current_picture_ptr, top + height - 1,
3582                              s->picture_structure==PICT_BOTTOM_FIELD);
3583 }
3584
3585 static int decode_slice(struct AVCodecContext *avctx, void *arg){
3586     H264Context *h = *(void**)arg;
3587     MpegEncContext * const s = &h->s;
3588     const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
3589     int lf_x_start = s->mb_x;
3590
3591     s->mb_skip_run= -1;
3592
3593     h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
3594                     (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
3595
3596     if( h->pps.cabac ) {
3597         /* realign */
3598         align_get_bits( &s->gb );
3599
3600         /* init cabac */
3601         ff_init_cabac_states( &h->cabac);
3602         ff_init_cabac_decoder( &h->cabac,
3603                                s->gb.buffer + get_bits_count(&s->gb)/8,
3604                                (get_bits_left(&s->gb) + 7)/8);
3605
3606         ff_h264_init_cabac_states(h);
3607
3608         for(;;){
3609 //START_TIMER
3610             int ret = ff_h264_decode_mb_cabac(h);
3611             int eos;
3612 //STOP_TIMER("decode_mb_cabac")
3613
3614             if(ret>=0) ff_h264_hl_decode_mb(h);
3615
3616             if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
3617                 s->mb_y++;
3618
3619                 ret = ff_h264_decode_mb_cabac(h);
3620
3621                 if(ret>=0) ff_h264_hl_decode_mb(h);
3622                 s->mb_y--;
3623             }
3624             eos = get_cabac_terminate( &h->cabac );
3625
3626             if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
3627                 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);
3628                 if (s->mb_x >= lf_x_start) loop_filter(h, lf_x_start, s->mb_x + 1);
3629                 return 0;
3630             }
3631             if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
3632                 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);
3633                 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);
3634                 return -1;
3635             }
3636
3637             if( ++s->mb_x >= s->mb_width ) {
3638                 loop_filter(h, lf_x_start, s->mb_x);
3639                 s->mb_x = lf_x_start = 0;
3640                 decode_finish_row(h);
3641                 ++s->mb_y;
3642                 if(FIELD_OR_MBAFF_PICTURE) {
3643                     ++s->mb_y;
3644                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
3645                         predict_field_decoding_flag(h);
3646                 }
3647             }
3648
3649             if( eos || s->mb_y >= s->mb_height ) {
3650                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
3651                 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);
3652                 if (s->mb_x > lf_x_start) loop_filter(h, lf_x_start, s->mb_x);
3653                 return 0;
3654             }
3655         }
3656
3657     } else {
3658         for(;;){
3659             int ret = ff_h264_decode_mb_cavlc(h);
3660
3661             if(ret>=0) ff_h264_hl_decode_mb(h);
3662
3663             if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
3664                 s->mb_y++;
3665                 ret = ff_h264_decode_mb_cavlc(h);
3666
3667                 if(ret>=0) ff_h264_hl_decode_mb(h);
3668                 s->mb_y--;
3669             }
3670
3671             if(ret<0){
3672                 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
3673                 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);
3674                 return -1;
3675             }
3676
3677             if(++s->mb_x >= s->mb_width){
3678                 loop_filter(h, lf_x_start, s->mb_x);
3679                 s->mb_x = lf_x_start = 0;
3680                 decode_finish_row(h);
3681                 ++s->mb_y;
3682                 if(FIELD_OR_MBAFF_PICTURE) {
3683                     ++s->mb_y;
3684                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
3685                         predict_field_decoding_flag(h);
3686                 }
3687                 if(s->mb_y >= s->mb_height){
3688                     tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
3689
3690                     if(   get_bits_count(&s->gb) == s->gb.size_in_bits
3691                        || get_bits_count(&s->gb) <  s->gb.size_in_bits && s->avctx->error_recognition < FF_ER_AGGRESSIVE) {
3692                         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);
3693
3694                         return 0;
3695                     }else{
3696                         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);
3697
3698                         return -1;
3699                     }
3700                 }
3701             }
3702
3703             if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
3704                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
3705                 if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
3706                     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);
3707                     if (s->mb_x > lf_x_start) loop_filter(h, lf_x_start, s->mb_x);
3708
3709                     return 0;
3710                 }else{
3711                     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);
3712
3713                     return -1;
3714                 }
3715             }
3716         }
3717     }
3718 }
3719
3720 /**
3721  * Call decode_slice() for each context.
3722  *
3723  * @param h h264 master context
3724  * @param context_count number of contexts to execute
3725  */
3726 static int execute_decode_slices(H264Context *h, int context_count){
3727     MpegEncContext * const s = &h->s;
3728     AVCodecContext * const avctx= s->avctx;
3729     H264Context *hx;
3730     int i;
3731
3732     if (s->avctx->hwaccel || s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
3733         return 0;
3734     if(context_count == 1) {
3735         return decode_slice(avctx, &h);
3736     } else {
3737         for(i = 1; i < context_count; i++) {
3738             hx = h->thread_context[i];
3739             hx->s.error_recognition = avctx->error_recognition;
3740             hx->s.error_count = 0;
3741             hx->x264_build= h->x264_build;
3742         }
3743
3744         avctx->execute(avctx, (void *)decode_slice,
3745                        h->thread_context, NULL, context_count, sizeof(void*));
3746
3747         /* pull back stuff from slices to master context */
3748         hx = h->thread_context[context_count - 1];
3749         s->mb_x = hx->s.mb_x;
3750         s->mb_y = hx->s.mb_y;
3751         s->dropable = hx->s.dropable;
3752         s->picture_structure = hx->s.picture_structure;
3753         for(i = 1; i < context_count; i++)
3754             h->s.error_count += h->thread_context[i]->s.error_count;
3755     }
3756
3757     return 0;
3758 }
3759
3760
3761 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
3762     MpegEncContext * const s = &h->s;
3763     AVCodecContext * const avctx= s->avctx;
3764     H264Context *hx; ///< thread context
3765     int buf_index;
3766     int context_count;
3767     int next_avc;
3768     int pass = !(avctx->active_thread_type & FF_THREAD_FRAME);
3769     int nals_needed=0; ///< number of NALs that need decoding before the next frame thread starts
3770     int nal_index;
3771
3772     h->max_contexts = (HAVE_THREADS && (s->avctx->active_thread_type&FF_THREAD_SLICE)) ? avctx->thread_count : 1;
3773     if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
3774         h->current_slice = 0;
3775         if (!s->first_field)
3776             s->current_picture_ptr= NULL;
3777         ff_h264_reset_sei(h);
3778     }
3779
3780     for(;pass <= 1;pass++){
3781         buf_index = 0;
3782         context_count = 0;
3783         next_avc = h->is_avc ? 0 : buf_size;
3784         nal_index = 0;
3785     for(;;){
3786         int consumed;
3787         int dst_length;
3788         int bit_length;
3789         const uint8_t *ptr;
3790         int i, nalsize = 0;
3791         int err;
3792
3793         if(buf_index >= next_avc) {
3794             if(buf_index >= buf_size) break;
3795             nalsize = 0;
3796             for(i = 0; i < h->nal_length_size; i++)
3797                 nalsize = (nalsize << 8) | buf[buf_index++];
3798             if(nalsize <= 0 || nalsize > buf_size - buf_index){
3799                 av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
3800                 break;
3801             }
3802             next_avc= buf_index + nalsize;
3803         } else {
3804             // start code prefix search
3805             for(; buf_index + 3 < next_avc; buf_index++){
3806                 // This should always succeed in the first iteration.
3807                 if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
3808                     break;
3809             }
3810
3811             if(buf_index+3 >= buf_size) break;
3812
3813             buf_index+=3;
3814             if(buf_index >= next_avc) continue;
3815         }
3816
3817         hx = h->thread_context[context_count];
3818
3819         ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
3820         if (ptr==NULL || dst_length < 0){
3821             return -1;
3822         }
3823         i= buf_index + consumed;
3824         if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
3825            buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
3826             s->workaround_bugs |= FF_BUG_TRUNCATED;
3827
3828         if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
3829         while(dst_length > 0 && ptr[dst_length - 1] == 0)
3830             dst_length--;
3831         }
3832         bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
3833
3834         if(s->avctx->debug&FF_DEBUG_STARTCODE){
3835             av_log(h->s.avctx, AV_LOG_DEBUG, "NAL %d/%d at %d/%d length %d\n", hx->nal_unit_type, hx->nal_ref_idc, buf_index, buf_size, dst_length);
3836         }
3837
3838         if (h->is_avc && (nalsize != consumed) && nalsize){
3839             av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
3840         }
3841
3842         buf_index += consumed;
3843         nal_index++;
3844
3845         if(pass == 0) {
3846             // packets can sometimes contain multiple PPS/SPS
3847             // e.g. two PAFF field pictures in one packet, or a demuxer which splits NALs strangely
3848             // if so, when frame threading we can't start the next thread until we've read all of them
3849             switch (hx->nal_unit_type) {
3850                 case NAL_SPS:
3851                 case NAL_PPS:
3852                     nals_needed = nal_index;
3853                     break;
3854                 case NAL_IDR_SLICE:
3855                 case NAL_SLICE:
3856                     init_get_bits(&hx->s.gb, ptr, bit_length);
3857                     if (!get_ue_golomb(&hx->s.gb))
3858                         nals_needed = nal_index;
3859             }
3860             continue;
3861         }
3862
3863         //FIXME do not discard SEI id
3864         if(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0)
3865             continue;
3866
3867       again:
3868         err = 0;
3869         switch(hx->nal_unit_type){
3870         case NAL_IDR_SLICE:
3871             if (h->nal_unit_type != NAL_IDR_SLICE) {
3872                 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
3873                 return -1;
3874             }
3875             idr(h); //FIXME ensure we don't loose some frames if there is reordering
3876         case NAL_SLICE:
3877             init_get_bits(&hx->s.gb, ptr, bit_length);
3878             hx->intra_gb_ptr=
3879             hx->inter_gb_ptr= &hx->s.gb;
3880             hx->s.data_partitioning = 0;
3881
3882             if((err = decode_slice_header(hx, h)))
3883                break;
3884
3885             if (   h->sei_recovery_frame_cnt >= 0
3886                 && ((h->recovery_frame - h->frame_num) & ((1 << h->sps.log2_max_frame_num)-1)) > h->sei_recovery_frame_cnt) {
3887                 h->recovery_frame = (h->frame_num + h->sei_recovery_frame_cnt) %
3888                                     (1 << h->sps.log2_max_frame_num);
3889             }
3890
3891             s->current_picture_ptr->f.key_frame |=
3892                     (hx->nal_unit_type == NAL_IDR_SLICE);
3893
3894             if (h->recovery_frame == h->frame_num) {
3895                 h->sync |= 1;
3896                 h->recovery_frame = -1;
3897             }
3898
3899             h->sync |= !!s->current_picture_ptr->f.key_frame;
3900             h->sync |= 3*!!(s->flags2 & CODEC_FLAG2_SHOW_ALL);
3901             s->current_picture_ptr->sync = h->sync;
3902
3903             if (h->current_slice == 1) {
3904                 if(!(s->flags2 & CODEC_FLAG2_CHUNKS)) {
3905                     decode_postinit(h, nal_index >= nals_needed);
3906                 }
3907
3908                 if (s->avctx->hwaccel && s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
3909                     return -1;
3910                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
3911                     ff_vdpau_h264_picture_start(s);
3912             }
3913
3914             if(hx->redundant_pic_count==0
3915                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
3916                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=AV_PICTURE_TYPE_B)
3917                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==AV_PICTURE_TYPE_I)
3918                && avctx->skip_frame < AVDISCARD_ALL){
3919                 if(avctx->hwaccel) {
3920                     if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
3921                         return -1;
3922                 }else
3923                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
3924                     static const uint8_t start_code[] = {0x00, 0x00, 0x01};
3925                     ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
3926                     ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
3927                 }else
3928                     context_count++;
3929             }
3930             break;
3931         case NAL_DPA:
3932             init_get_bits(&hx->s.gb, ptr, bit_length);
3933             hx->intra_gb_ptr=
3934             hx->inter_gb_ptr= NULL;
3935
3936             if ((err = decode_slice_header(hx, h)) < 0)
3937                 break;
3938
3939             hx->s.data_partitioning = 1;
3940
3941             break;
3942         case NAL_DPB:
3943             init_get_bits(&hx->intra_gb, ptr, bit_length);
3944             hx->intra_gb_ptr= &hx->intra_gb;
3945             break;
3946         case NAL_DPC:
3947             init_get_bits(&hx->inter_gb, ptr, bit_length);
3948             hx->inter_gb_ptr= &hx->inter_gb;
3949
3950             if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
3951                && s->context_initialized
3952                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
3953                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=AV_PICTURE_TYPE_B)
3954                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==AV_PICTURE_TYPE_I)
3955                && avctx->skip_frame < AVDISCARD_ALL)
3956                 context_count++;
3957             break;
3958         case NAL_SEI:
3959             init_get_bits(&s->gb, ptr, bit_length);
3960             ff_h264_decode_sei(h);
3961             break;
3962         case NAL_SPS:
3963             init_get_bits(&s->gb, ptr, bit_length);
3964             if(ff_h264_decode_seq_parameter_set(h) < 0 && (h->is_avc ? (nalsize != consumed) && nalsize : 1)){
3965                 av_log(h->s.avctx, AV_LOG_DEBUG, "SPS decoding failure, trying alternative mode\n");
3966                 if(h->is_avc) av_assert0(next_avc - buf_index + consumed == nalsize);
3967                 init_get_bits(&s->gb, &buf[buf_index + 1 - consumed], 8*(next_avc - buf_index + consumed));
3968                 ff_h264_decode_seq_parameter_set(h);
3969             }
3970
3971             if (s->flags& CODEC_FLAG_LOW_DELAY ||
3972                 (h->sps.bitstream_restriction_flag && !h->sps.num_reorder_frames))
3973                 s->low_delay=1;
3974
3975             if(avctx->has_b_frames < 2)
3976                 avctx->has_b_frames= !s->low_delay;
3977             break;
3978         case NAL_PPS:
3979             init_get_bits(&s->gb, ptr, bit_length);
3980
3981             ff_h264_decode_picture_parameter_set(h, bit_length);
3982
3983             break;
3984         case NAL_AUD:
3985         case NAL_END_SEQUENCE:
3986         case NAL_END_STREAM:
3987         case NAL_FILLER_DATA:
3988         case NAL_SPS_EXT:
3989         case NAL_AUXILIARY_SLICE:
3990             break;
3991         default:
3992             av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
3993         }
3994
3995         if(context_count == h->max_contexts) {
3996             execute_decode_slices(h, context_count);
3997             context_count = 0;
3998         }
3999
4000         if (err < 0)
4001             av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
4002         else if(err == 1) {
4003             /* Slice could not be decoded in parallel mode, copy down
4004              * NAL unit stuff to context 0 and restart. Note that
4005              * rbsp_buffer is not transferred, but since we no longer
4006              * run in parallel mode this should not be an issue. */
4007             h->nal_unit_type = hx->nal_unit_type;
4008             h->nal_ref_idc   = hx->nal_ref_idc;
4009             hx = h;
4010             goto again;
4011         }
4012     }
4013     }
4014     if(context_count)
4015         execute_decode_slices(h, context_count);
4016     return buf_index;
4017 }
4018
4019 /**
4020  * returns the number of bytes consumed for building the current frame
4021  */
4022 static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
4023         if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
4024         if(pos+10>buf_size) pos=buf_size; // oops ;)
4025
4026         return pos;
4027 }
4028
4029 static int decode_frame(AVCodecContext *avctx,
4030                              void *data, int *data_size,
4031                              AVPacket *avpkt)
4032 {
4033     const uint8_t *buf = avpkt->data;
4034     int buf_size = avpkt->size;
4035     H264Context *h = avctx->priv_data;
4036     MpegEncContext *s = &h->s;
4037     AVFrame *pict = data;
4038     int buf_index;
4039
4040     s->flags= avctx->flags;
4041     s->flags2= avctx->flags2;
4042
4043    /* end of stream, output what is still in the buffers */
4044  out:
4045     if (buf_size == 0) {
4046         Picture *out;
4047         int i, out_idx;
4048
4049         s->current_picture_ptr = NULL;
4050
4051 //FIXME factorize this with the output code below
4052         out = h->delayed_pic[0];
4053         out_idx = 0;
4054         for (i = 1; h->delayed_pic[i] && !h->delayed_pic[i]->f.key_frame && !h->delayed_pic[i]->mmco_reset; i++)
4055             if(h->delayed_pic[i]->poc < out->poc){
4056                 out = h->delayed_pic[i];
4057                 out_idx = i;
4058             }
4059
4060         for(i=out_idx; h->delayed_pic[i]; i++)
4061             h->delayed_pic[i] = h->delayed_pic[i+1];
4062
4063         if(out){
4064             *data_size = sizeof(AVFrame);
4065             *pict= *(AVFrame*)out;
4066         }
4067
4068         return 0;
4069     }
4070     if(h->is_avc && buf_size >= 9 && AV_RB32(buf)==0x0164001F && buf[5] && buf[8]==0x67)
4071         return ff_h264_decode_extradata(h, buf, buf_size);
4072
4073     buf_index=decode_nal_units(h, buf, buf_size);
4074     if(buf_index < 0)
4075         return -1;
4076
4077     if (!s->current_picture_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
4078         buf_size = 0;
4079         goto out;
4080     }
4081
4082     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
4083         if (avctx->skip_frame >= AVDISCARD_NONREF)
4084             return 0;
4085         av_log(avctx, AV_LOG_ERROR, "no frame!\n");
4086         return -1;
4087     }
4088
4089     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
4090
4091         if(s->flags2 & CODEC_FLAG2_CHUNKS) decode_postinit(h, 1);
4092
4093         field_end(h, 0);
4094
4095         *data_size = 0; /* Wait for second field. */
4096         if (h->next_output_pic && h->next_output_pic->sync) {
4097             if(h->sync>1 || h->next_output_pic->f.pict_type != AV_PICTURE_TYPE_B){
4098                 *data_size = sizeof(AVFrame);
4099                 *pict = *(AVFrame*)h->next_output_pic;
4100             }
4101         }
4102     }
4103
4104     assert(pict->data[0] || !*data_size);
4105     ff_print_debug_info(s, pict);
4106 //printf("out %d\n", (int)pict->data[0]);
4107
4108     return get_consumed_bytes(s, buf_index, buf_size);
4109 }
4110 #if 0
4111 static inline void fill_mb_avail(H264Context *h){
4112     MpegEncContext * const s = &h->s;
4113     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
4114
4115     if(s->mb_y){
4116         h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
4117         h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
4118         h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
4119     }else{
4120         h->mb_avail[0]=
4121         h->mb_avail[1]=
4122         h->mb_avail[2]= 0;
4123     }
4124     h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
4125     h->mb_avail[4]= 1; //FIXME move out
4126     h->mb_avail[5]= 0; //FIXME move out
4127 }
4128 #endif
4129
4130 #ifdef TEST
4131 #undef printf
4132 #undef random
4133 #define COUNT 8000
4134 #define SIZE (COUNT*40)
4135 extern AVCodec ff_h264_decoder;
4136 int main(void){
4137     int i;
4138     uint8_t temp[SIZE];
4139     PutBitContext pb;
4140     GetBitContext gb;
4141 //    int int_temp[10000];
4142     DSPContext dsp;
4143     AVCodecContext avctx;
4144
4145     avcodec_get_context_defaults3(&avctx, &ff_h264_decoder);
4146
4147     dsputil_init(&dsp, &avctx);
4148
4149     init_put_bits(&pb, temp, SIZE);
4150     printf("testing unsigned exp golomb\n");
4151     for(i=0; i<COUNT; i++){
4152         START_TIMER
4153         set_ue_golomb(&pb, i);
4154         STOP_TIMER("set_ue_golomb");
4155     }
4156     flush_put_bits(&pb);
4157
4158     init_get_bits(&gb, temp, 8*SIZE);
4159     for(i=0; i<COUNT; i++){
4160         int j, s;
4161
4162         s= show_bits(&gb, 24);
4163
4164         START_TIMER
4165         j= get_ue_golomb(&gb);
4166         if(j != i){
4167             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
4168 //            return -1;
4169         }
4170         STOP_TIMER("get_ue_golomb");
4171     }
4172
4173
4174     init_put_bits(&pb, temp, SIZE);
4175     printf("testing signed exp golomb\n");
4176     for(i=0; i<COUNT; i++){
4177         START_TIMER
4178         set_se_golomb(&pb, i - COUNT/2);
4179         STOP_TIMER("set_se_golomb");
4180     }
4181     flush_put_bits(&pb);
4182
4183     init_get_bits(&gb, temp, 8*SIZE);
4184     for(i=0; i<COUNT; i++){
4185         int j, s;
4186
4187         s= show_bits(&gb, 24);
4188
4189         START_TIMER
4190         j= get_se_golomb(&gb);
4191         if(j != i - COUNT/2){
4192             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
4193 //            return -1;
4194         }
4195         STOP_TIMER("get_se_golomb");
4196     }
4197
4198     printf("Testing RBSP\n");
4199
4200
4201     return 0;
4202 }
4203 #endif /* TEST */
4204
4205
4206 av_cold void ff_h264_free_context(H264Context *h)
4207 {
4208     int i;
4209
4210     free_tables(h, 1); //FIXME cleanup init stuff perhaps
4211
4212     for(i = 0; i < MAX_SPS_COUNT; i++)
4213         av_freep(h->sps_buffers + i);
4214
4215     for(i = 0; i < MAX_PPS_COUNT; i++)
4216         av_freep(h->pps_buffers + i);
4217 }
4218
4219 av_cold int ff_h264_decode_end(AVCodecContext *avctx)
4220 {
4221     H264Context *h = avctx->priv_data;
4222     MpegEncContext *s = &h->s;
4223
4224     ff_h264_free_context(h);
4225
4226     MPV_common_end(s);
4227
4228 //    memset(h, 0, sizeof(H264Context));
4229
4230     return 0;
4231 }
4232
4233 static const AVProfile profiles[] = {
4234     { FF_PROFILE_H264_BASELINE,             "Baseline"              },
4235     { FF_PROFILE_H264_CONSTRAINED_BASELINE, "Constrained Baseline"  },
4236     { FF_PROFILE_H264_MAIN,                 "Main"                  },
4237     { FF_PROFILE_H264_EXTENDED,             "Extended"              },
4238     { FF_PROFILE_H264_HIGH,                 "High"                  },
4239     { FF_PROFILE_H264_HIGH_10,              "High 10"               },
4240     { FF_PROFILE_H264_HIGH_10_INTRA,        "High 10 Intra"         },
4241     { FF_PROFILE_H264_HIGH_422,             "High 4:2:2"            },
4242     { FF_PROFILE_H264_HIGH_422_INTRA,       "High 4:2:2 Intra"      },
4243     { FF_PROFILE_H264_HIGH_444,             "High 4:4:4"            },
4244     { FF_PROFILE_H264_HIGH_444_PREDICTIVE,  "High 4:4:4 Predictive" },
4245     { FF_PROFILE_H264_HIGH_444_INTRA,       "High 4:4:4 Intra"      },
4246     { FF_PROFILE_H264_CAVLC_444,            "CAVLC 4:4:4"           },
4247     { FF_PROFILE_UNKNOWN },
4248 };
4249
4250 static const AVOption h264_options[] = {
4251     {"is_avc", "is avc", offsetof(H264Context, is_avc), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 1, 0},
4252     {"nal_length_size", "nal_length_size", offsetof(H264Context, nal_length_size), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 4, 0},
4253     {NULL}
4254 };
4255
4256 static const AVClass h264_class = {
4257     "H264 Decoder",
4258     av_default_item_name,
4259     h264_options,
4260     LIBAVUTIL_VERSION_INT,
4261 };
4262
4263 static const AVClass h264_vdpau_class = {
4264     "H264 VDPAU Decoder",
4265     av_default_item_name,
4266     h264_options,
4267     LIBAVUTIL_VERSION_INT,
4268 };
4269
4270 AVCodec ff_h264_decoder = {
4271     .name           = "h264",
4272     .type           = AVMEDIA_TYPE_VIDEO,
4273     .id             = CODEC_ID_H264,
4274     .priv_data_size = sizeof(H264Context),
4275     .init           = ff_h264_decode_init,
4276     .close          = ff_h264_decode_end,
4277     .decode         = decode_frame,
4278     .capabilities   = /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY |
4279                       CODEC_CAP_SLICE_THREADS | CODEC_CAP_FRAME_THREADS,
4280     .flush= flush_dpb,
4281     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
4282     .init_thread_copy      = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
4283     .update_thread_context = ONLY_IF_THREADS_ENABLED(decode_update_thread_context),
4284     .profiles = NULL_IF_CONFIG_SMALL(profiles),
4285     .priv_class     = &h264_class,
4286 };
4287
4288 #if CONFIG_H264_VDPAU_DECODER
4289 AVCodec ff_h264_vdpau_decoder = {
4290     .name           = "h264_vdpau",
4291     .type           = AVMEDIA_TYPE_VIDEO,
4292     .id             = CODEC_ID_H264,
4293     .priv_data_size = sizeof(H264Context),
4294     .init           = ff_h264_decode_init,
4295     .close          = ff_h264_decode_end,
4296     .decode         = decode_frame,
4297     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
4298     .flush= flush_dpb,
4299     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
4300     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
4301     .profiles = NULL_IF_CONFIG_SMALL(profiles),
4302     .priv_class     = &h264_vdpau_class,
4303 };
4304 #endif