git.sesse.net Git - ffmpeg/blob - libavcodec/h264.c

   1 /*
   2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
   3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of 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 "internal.h"
  30 #include "dsputil.h"
  31 #include "avcodec.h"
  32 #include "mpegvideo.h"
  33 #include "h264.h"
  34 #include "h264data.h"
  35 #include "h264_mvpred.h"
  36 #include "golomb.h"
  37 #include "mathops.h"
  38 #include "rectangle.h"
  39 #include "thread.h"
  40 #include "vdpau_internal.h"
  41 #include "libavutil/avassert.h"
  42
  43 #include "cabac.h"
  44
  45 //#undef NDEBUG
  46 #include <assert.h>
  47
  48 static const uint8_t rem6[QP_MAX_NUM+1]={
  49 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,
  50 };
  51
  52 static const uint8_t div6[QP_MAX_NUM+1]={
  53 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,
  54 };
  55
  56 static const enum PixelFormat hwaccel_pixfmt_list_h264_jpeg_420[] = {
  57     PIX_FMT_DXVA2_VLD,
  58     PIX_FMT_VAAPI_VLD,
  59     PIX_FMT_YUVJ420P,
  60     PIX_FMT_NONE
  61 };
  62
  63 /**
  64  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
  65  */
  66 int ff_h264_check_intra4x4_pred_mode(H264Context *h){
  67     MpegEncContext * const s = &h->s;
  68     static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
  69     static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
  70     int i;
  71
  72     if(!(h->top_samples_available&0x8000)){
  73         for(i=0; i<4; i++){
  74             int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
  75             if(status<0){
  76                 av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
  77                 return -1;
  78             } else if(status){
  79                 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
  80             }
  81         }
  82     }
  83
  84     if((h->left_samples_available&0x8888)!=0x8888){
  85         static const int mask[4]={0x8000,0x2000,0x80,0x20};
  86         for(i=0; i<4; i++){
  87             if(!(h->left_samples_available&mask[i])){
  88                 int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
  89                 if(status<0){
  90                     av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
  91                     return -1;
  92                 } else if(status){
  93                     h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
  94                 }
  95             }
  96         }
  97     }
  98
  99     return 0;
 100 } //FIXME cleanup like check_intra_pred_mode
 101
 102 static int check_intra_pred_mode(H264Context *h, int mode, int is_chroma){
 103     MpegEncContext * const s = &h->s;
 104     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
 105     static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
 106
 107     if(mode > 6U) {
 108         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);
 109         return -1;
 110     }
 111
 112     if(!(h->top_samples_available&0x8000)){
 113         mode= top[ mode ];
 114         if(mode<0){
 115             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);
 116             return -1;
 117         }
 118     }
 119
 120     if((h->left_samples_available&0x8080) != 0x8080){
 121         mode= left[ mode ];
 122         if(is_chroma && (h->left_samples_available&0x8080)){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
 123             mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
 124         }
 125         if(mode<0){
 126             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);
 127             return -1;
 128         }
 129     }
 130
 131     return mode;
 132 }
 133
 134 /**
 135  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 136  */
 137 int ff_h264_check_intra16x16_pred_mode(H264Context *h, int mode)
 138 {
 139     return check_intra_pred_mode(h, mode, 0);
 140 }
 141
 142 /**
 143  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 144  */
 145 int ff_h264_check_intra_chroma_pred_mode(H264Context *h, int mode)
 146 {
 147     return check_intra_pred_mode(h, mode, 1);
 148 }
 149
 150
 151 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
 152     int i, si, di;
 153     uint8_t *dst;
 154     int bufidx;
 155
 156 //    src[0]&0x80;                //forbidden bit
 157     h->nal_ref_idc= src[0]>>5;
 158     h->nal_unit_type= src[0]&0x1F;
 159
 160     src++; length--;
 161
 162 #if HAVE_FAST_UNALIGNED
 163 # if HAVE_FAST_64BIT
 164 #   define RS 7
 165     for(i=0; i+1<length; i+=9){
 166         if(!((~AV_RN64A(src+i) & (AV_RN64A(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
 167 # else
 168 #   define RS 3
 169     for(i=0; i+1<length; i+=5){
 170         if(!((~AV_RN32A(src+i) & (AV_RN32A(src+i) - 0x01000101U)) & 0x80008080U))
 171 # endif
 172             continue;
 173         if(i>0 && !src[i]) i--;
 174         while(src[i]) i++;
 175 #else
 176 #   define RS 0
 177     for(i=0; i+1<length; i+=2){
 178         if(src[i]) continue;
 179         if(i>0 && src[i-1]==0) i--;
 180 #endif
 181         if(i+2<length && src[i+1]==0 && src[i+2]<=3){
 182             if(src[i+2]!=3){
 183                 /* startcode, so we must be past the end */
 184                 length=i;
 185             }
 186             break;
 187         }
 188         i-= RS;
 189     }
 190
 191     bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
 192     si=h->rbsp_buffer_size[bufidx];
 193     av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE+MAX_MBPAIR_SIZE);
 194     dst= h->rbsp_buffer[bufidx];
 195     if(si != h->rbsp_buffer_size[bufidx])
 196         memset(dst + length, 0, FF_INPUT_BUFFER_PADDING_SIZE+MAX_MBPAIR_SIZE);
 197
 198     if (dst == NULL){
 199         return NULL;
 200     }
 201
 202     if(i>=length-1){ //no escaped 0
 203         *dst_length= length;
 204         *consumed= length+1; //+1 for the header
 205         if(h->s.avctx->flags2 & CODEC_FLAG2_FAST){
 206             return src;
 207         }else{
 208             memcpy(dst, src, length);
 209             return dst;
 210         }
 211     }
 212
 213 //printf("decoding esc\n");
 214     memcpy(dst, src, i);
 215     si=di=i;
 216     while(si+2<length){
 217         //remove escapes (very rare 1:2^22)
 218         if(src[si+2]>3){
 219             dst[di++]= src[si++];
 220             dst[di++]= src[si++];
 221         }else if(src[si]==0 && src[si+1]==0){
 222             if(src[si+2]==3){ //escape
 223                 dst[di++]= 0;
 224                 dst[di++]= 0;
 225                 si+=3;
 226                 continue;
 227             }else //next start code
 228                 goto nsc;
 229         }
 230
 231         dst[di++]= src[si++];
 232     }
 233     while(si<length)
 234         dst[di++]= src[si++];
 235 nsc:
 236
 237     memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
 238
 239     *dst_length= di;
 240     *consumed= si + 1;//+1 for the header
 241 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
 242     return dst;
 243 }
 244
 245 /**
 246  * Identify the exact end of the bitstream
 247  * @return the length of the trailing, or 0 if damaged
 248  */
 249 static int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
 250     int v= *src;
 251     int r;
 252
 253     tprintf(h->s.avctx, "rbsp trailing %X\n", v);
 254
 255     for(r=1; r<9; r++){
 256         if(v&1) return r;
 257         v>>=1;
 258     }
 259     return 0;
 260 }
 261
 262 static inline int get_lowest_part_list_y(H264Context *h, Picture *pic, int n, int height,
 263                                  int y_offset, int list){
 264     int raw_my= h->mv_cache[list][ scan8[n] ][1];
 265     int filter_height= (raw_my&3) ? 2 : 0;
 266     int full_my= (raw_my>>2) + y_offset;
 267     int top = full_my - filter_height, bottom = full_my + height + filter_height;
 268
 269     return FFMAX(abs(top), bottom);
 270 }
 271
 272 static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n, int height,
 273                                int y_offset, int list0, int list1, int *nrefs){
 274     MpegEncContext * const s = &h->s;
 275     int my;
 276
 277     y_offset += 16*(s->mb_y >> MB_FIELD);
 278
 279     if(list0){
 280         int ref_n = h->ref_cache[0][ scan8[n] ];
 281         Picture *ref= &h->ref_list[0][ref_n];
 282
 283         // Error resilience puts the current picture in the ref list.
 284         // Don't try to wait on these as it will cause a deadlock.
 285         // Fields can wait on each other, though.
 286         if (ref->f.thread_opaque != s->current_picture.f.thread_opaque ||
 287            (ref->f.reference & 3) != s->picture_structure) {
 288             my = get_lowest_part_list_y(h, ref, n, height, y_offset, 0);
 289             if (refs[0][ref_n] < 0) nrefs[0] += 1;
 290             refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
 291         }
 292     }
 293
 294     if(list1){
 295         int ref_n = h->ref_cache[1][ scan8[n] ];
 296         Picture *ref= &h->ref_list[1][ref_n];
 297
 298         if (ref->f.thread_opaque != s->current_picture.f.thread_opaque ||
 299            (ref->f.reference & 3) != s->picture_structure) {
 300             my = get_lowest_part_list_y(h, ref, n, height, y_offset, 1);
 301             if (refs[1][ref_n] < 0) nrefs[1] += 1;
 302             refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
 303         }
 304     }
 305 }
 306
 307 /**
 308  * Wait until all reference frames are available for MC operations.
 309  *
 310  * @param h the H264 context
 311  */
 312 static void await_references(H264Context *h){
 313     MpegEncContext * const s = &h->s;
 314     const int mb_xy= h->mb_xy;
 315     const int mb_type = s->current_picture.f.mb_type[mb_xy];
 316     int refs[2][48];
 317     int nrefs[2] = {0};
 318     int ref, list;
 319
 320     memset(refs, -1, sizeof(refs));
 321
 322     if(IS_16X16(mb_type)){
 323         get_lowest_part_y(h, refs, 0, 16, 0,
 324                   IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
 325     }else if(IS_16X8(mb_type)){
 326         get_lowest_part_y(h, refs, 0, 8, 0,
 327                   IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
 328         get_lowest_part_y(h, refs, 8, 8, 8,
 329                   IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
 330     }else if(IS_8X16(mb_type)){
 331         get_lowest_part_y(h, refs, 0, 16, 0,
 332                   IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
 333         get_lowest_part_y(h, refs, 4, 16, 0,
 334                   IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
 335     }else{
 336         int i;
 337
 338         assert(IS_8X8(mb_type));
 339
 340         for(i=0; i<4; i++){
 341             const int sub_mb_type= h->sub_mb_type[i];
 342             const int n= 4*i;
 343             int y_offset= (i&2)<<2;
 344
 345             if(IS_SUB_8X8(sub_mb_type)){
 346                 get_lowest_part_y(h, refs, n  , 8, y_offset,
 347                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 348             }else if(IS_SUB_8X4(sub_mb_type)){
 349                 get_lowest_part_y(h, refs, n  , 4, y_offset,
 350                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 351                 get_lowest_part_y(h, refs, n+2, 4, y_offset+4,
 352                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 353             }else if(IS_SUB_4X8(sub_mb_type)){
 354                 get_lowest_part_y(h, refs, n  , 8, y_offset,
 355                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 356                 get_lowest_part_y(h, refs, n+1, 8, y_offset,
 357                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 358             }else{
 359                 int j;
 360                 assert(IS_SUB_4X4(sub_mb_type));
 361                 for(j=0; j<4; j++){
 362                     int sub_y_offset= y_offset + 2*(j&2);
 363                     get_lowest_part_y(h, refs, n+j, 4, sub_y_offset,
 364                               IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 365                 }
 366             }
 367         }
 368     }
 369
 370     for(list=h->list_count-1; list>=0; list--){
 371         for(ref=0; ref<48 && nrefs[list]; ref++){
 372             int row = refs[list][ref];
 373             if(row >= 0){
 374                 Picture *ref_pic = &h->ref_list[list][ref];
 375                 int ref_field = ref_pic->f.reference - 1;
 376                 int ref_field_picture = ref_pic->field_picture;
 377                 int pic_height = 16*s->mb_height >> ref_field_picture;
 378
 379                 row <<= MB_MBAFF;
 380                 nrefs[list]--;
 381
 382                 if(!FIELD_PICTURE && ref_field_picture){ // frame referencing two fields
 383                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN((row >> 1) - !(row&1), pic_height-1), 1);
 384                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN((row >> 1)           , pic_height-1), 0);
 385                 }else if(FIELD_PICTURE && !ref_field_picture){ // field referencing one field of a frame
 386                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row*2 + ref_field    , pic_height-1), 0);
 387                 }else if(FIELD_PICTURE){
 388                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row, pic_height-1), ref_field);
 389                 }else{
 390                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row, pic_height-1), 0);
 391                 }
 392             }
 393         }
 394     }
 395 }
 396
 397 #if 0
 398 /**
 399  * DCT transforms the 16 dc values.
 400  * @param qp quantization parameter ??? FIXME
 401  */
 402 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
 403 //    const int qmul= dequant_coeff[qp][0];
 404     int i;
 405     int temp[16]; //FIXME check if this is a good idea
 406     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
 407     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
 408
 409     for(i=0; i<4; i++){
 410         const int offset= y_offset[i];
 411         const int z0= block[offset+stride*0] + block[offset+stride*4];
 412         const int z1= block[offset+stride*0] - block[offset+stride*4];
 413         const int z2= block[offset+stride*1] - block[offset+stride*5];
 414         const int z3= block[offset+stride*1] + block[offset+stride*5];
 415
 416         temp[4*i+0]= z0+z3;
 417         temp[4*i+1]= z1+z2;
 418         temp[4*i+2]= z1-z2;
 419         temp[4*i+3]= z0-z3;
 420     }
 421
 422     for(i=0; i<4; i++){
 423         const int offset= x_offset[i];
 424         const int z0= temp[4*0+i] + temp[4*2+i];
 425         const int z1= temp[4*0+i] - temp[4*2+i];
 426         const int z2= temp[4*1+i] - temp[4*3+i];
 427         const int z3= temp[4*1+i] + temp[4*3+i];
 428
 429         block[stride*0 +offset]= (z0 + z3)>>1;
 430         block[stride*2 +offset]= (z1 + z2)>>1;
 431         block[stride*8 +offset]= (z1 - z2)>>1;
 432         block[stride*10+offset]= (z0 - z3)>>1;
 433     }
 434 }
 435 #endif
 436
 437 #undef xStride
 438 #undef stride
 439
 440 #if 0
 441 static void chroma_dc_dct_c(DCTELEM *block){
 442     const int stride= 16*2;
 443     const int xStride= 16;
 444     int a,b,c,d,e;
 445
 446     a= block[stride*0 + xStride*0];
 447     b= block[stride*0 + xStride*1];
 448     c= block[stride*1 + xStride*0];
 449     d= block[stride*1 + xStride*1];
 450
 451     e= a-b;
 452     a= a+b;
 453     b= c-d;
 454     c= c+d;
 455
 456     block[stride*0 + xStride*0]= (a+c);
 457     block[stride*0 + xStride*1]= (e+b);
 458     block[stride*1 + xStride*0]= (a-c);
 459     block[stride*1 + xStride*1]= (e-b);
 460 }
 461 #endif
 462
 463 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
 464                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 465                            int src_x_offset, int src_y_offset,
 466                            qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op,
 467                            int pixel_shift, int chroma444){
 468     MpegEncContext * const s = &h->s;
 469     const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
 470     int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
 471     const int luma_xy= (mx&3) + ((my&3)<<2);
 472     int offset = ((mx>>2) << pixel_shift) + (my>>2)*h->mb_linesize;
 473     uint8_t * src_y = pic->f.data[0] + offset;
 474     uint8_t * src_cb, * src_cr;
 475     int extra_width= h->emu_edge_width;
 476     int extra_height= h->emu_edge_height;
 477     int emu=0;
 478     const int full_mx= mx>>2;
 479     const int full_my= my>>2;
 480     const int pic_width  = 16*s->mb_width;
 481     const int pic_height = 16*s->mb_height >> MB_FIELD;
 482
 483     if(mx&7) extra_width -= 3;
 484     if(my&7) extra_height -= 3;
 485
 486     if(   full_mx < 0-extra_width
 487        || full_my < 0-extra_height
 488        || full_mx + 16/*FIXME*/ > pic_width + extra_width
 489        || full_my + 16/*FIXME*/ > pic_height + extra_height){
 490         s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_y - (2 << pixel_shift) - 2*h->mb_linesize, h->mb_linesize, 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
 491             src_y= s->edge_emu_buffer + (2 << pixel_shift) + 2*h->mb_linesize;
 492         emu=1;
 493     }
 494
 495     qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
 496     if(!square){
 497         qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
 498     }
 499
 500     if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
 501
 502     if(chroma444){
 503         src_cb = pic->f.data[1] + offset;
 504         if(emu){
 505             s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cb - (2 << pixel_shift) - 2*h->mb_linesize, h->mb_linesize,
 506                                     16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
 507             src_cb= s->edge_emu_buffer + (2 << pixel_shift) + 2*h->mb_linesize;
 508         }
 509         qpix_op[luma_xy](dest_cb, src_cb, h->mb_linesize); //FIXME try variable height perhaps?
 510         if(!square){
 511             qpix_op[luma_xy](dest_cb + delta, src_cb + delta, h->mb_linesize);
 512         }
 513
 514         src_cr = pic->f.data[2] + offset;
 515         if(emu){
 516             s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cr - (2 << pixel_shift) - 2*h->mb_linesize, h->mb_linesize,
 517                                     16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
 518             src_cr= s->edge_emu_buffer + (2 << pixel_shift) + 2*h->mb_linesize;
 519         }
 520         qpix_op[luma_xy](dest_cr, src_cr, h->mb_linesize); //FIXME try variable height perhaps?
 521         if(!square){
 522             qpix_op[luma_xy](dest_cr + delta, src_cr + delta, h->mb_linesize);
 523         }
 524         return;
 525     }
 526
 527     if(MB_FIELD){
 528         // chroma offset when predicting from a field of opposite parity
 529         my += 2 * ((s->mb_y & 1) - (pic->f.reference - 1));
 530         emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
 531     }
 532     src_cb = pic->f.data[1] + ((mx >> 3) << pixel_shift) + (my >> 3) * h->mb_uvlinesize;
 533     src_cr = pic->f.data[2] + ((mx >> 3) << pixel_shift) + (my >> 3) * h->mb_uvlinesize;
 534
 535     if(emu){
 536         s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cb, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
 537             src_cb= s->edge_emu_buffer;
 538     }
 539     chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
 540
 541     if(emu){
 542         s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cr, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
 543             src_cr= s->edge_emu_buffer;
 544     }
 545     chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
 546 }
 547
 548 static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
 549                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 550                            int x_offset, int y_offset,
 551                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 552                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 553                            int list0, int list1, int pixel_shift, int chroma444){
 554     MpegEncContext * const s = &h->s;
 555     qpel_mc_func *qpix_op=  qpix_put;
 556     h264_chroma_mc_func chroma_op= chroma_put;
 557
 558     dest_y  += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 559     if(chroma444){
 560         dest_cb += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 561         dest_cr += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 562     }else{
 563         dest_cb += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 564         dest_cr += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 565     }
 566     x_offset += 8*s->mb_x;
 567     y_offset += 8*(s->mb_y >> MB_FIELD);
 568
 569     if(list0){
 570         Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
 571         mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
 572                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 573                            qpix_op, chroma_op, pixel_shift, chroma444);
 574
 575         qpix_op=  qpix_avg;
 576         chroma_op= chroma_avg;
 577     }
 578
 579     if(list1){
 580         Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
 581         mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
 582                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 583                            qpix_op, chroma_op, pixel_shift, chroma444);
 584     }
 585 }
 586
 587 static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
 588                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 589                            int x_offset, int y_offset,
 590                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 591                            h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
 592                            h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
 593                            int list0, int list1, int pixel_shift, int chroma444){
 594     MpegEncContext * const s = &h->s;
 595
 596     dest_y += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 597     if(chroma444){
 598         chroma_weight_avg = luma_weight_avg;
 599         chroma_weight_op = luma_weight_op;
 600         dest_cb += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 601         dest_cr += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 602     }else{
 603         dest_cb += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 604         dest_cr += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 605     }
 606     x_offset += 8*s->mb_x;
 607     y_offset += 8*(s->mb_y >> MB_FIELD);
 608
 609     if(list0 && list1){
 610         /* don't optimize for luma-only case, since B-frames usually
 611          * use implicit weights => chroma too. */
 612         uint8_t *tmp_cb = s->obmc_scratchpad;
 613         uint8_t *tmp_cr = s->obmc_scratchpad + (16 << pixel_shift);
 614         uint8_t *tmp_y  = s->obmc_scratchpad + 16*h->mb_uvlinesize;
 615         int refn0 = h->ref_cache[0][ scan8[n] ];
 616         int refn1 = h->ref_cache[1][ scan8[n] ];
 617
 618         mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
 619                     dest_y, dest_cb, dest_cr,
 620                     x_offset, y_offset, qpix_put, chroma_put, pixel_shift, chroma444);
 621         mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
 622                     tmp_y, tmp_cb, tmp_cr,
 623                     x_offset, y_offset, qpix_put, chroma_put, pixel_shift, chroma444);
 624
 625         if(h->use_weight == 2){
 626             int weight0 = h->implicit_weight[refn0][refn1][s->mb_y&1];
 627             int weight1 = 64 - weight0;
 628             luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
 629             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
 630             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
 631         }else{
 632             luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
 633                             h->luma_weight[refn0][0][0] , h->luma_weight[refn1][1][0],
 634                             h->luma_weight[refn0][0][1] + h->luma_weight[refn1][1][1]);
 635             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 636                             h->chroma_weight[refn0][0][0][0] , h->chroma_weight[refn1][1][0][0],
 637                             h->chroma_weight[refn0][0][0][1] + h->chroma_weight[refn1][1][0][1]);
 638             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 639                             h->chroma_weight[refn0][0][1][0] , h->chroma_weight[refn1][1][1][0],
 640                             h->chroma_weight[refn0][0][1][1] + h->chroma_weight[refn1][1][1][1]);
 641         }
 642     }else{
 643         int list = list1 ? 1 : 0;
 644         int refn = h->ref_cache[list][ scan8[n] ];
 645         Picture *ref= &h->ref_list[list][refn];
 646         mc_dir_part(h, ref, n, square, chroma_height, delta, list,
 647                     dest_y, dest_cb, dest_cr, x_offset, y_offset,
 648                     qpix_put, chroma_put, pixel_shift, chroma444);
 649
 650         luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
 651                        h->luma_weight[refn][list][0], h->luma_weight[refn][list][1]);
 652         if(h->use_weight_chroma){
 653             chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 654                              h->chroma_weight[refn][list][0][0], h->chroma_weight[refn][list][0][1]);
 655             chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 656                              h->chroma_weight[refn][list][1][0], h->chroma_weight[refn][list][1][1]);
 657         }
 658     }
 659 }
 660
 661 static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
 662                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 663                            int x_offset, int y_offset,
 664                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 665                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 666                            h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 667                            int list0, int list1, int pixel_shift, int chroma444){
 668     if((h->use_weight==2 && list0 && list1
 669         && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ][h->s.mb_y&1] != 32))
 670        || h->use_weight==1)
 671         mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
 672                          x_offset, y_offset, qpix_put, chroma_put,
 673                          weight_op[0], weight_op[3], weight_avg[0],
 674                          weight_avg[3], list0, list1, pixel_shift, chroma444);
 675     else
 676         mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
 677                     x_offset, y_offset, qpix_put, chroma_put, qpix_avg,
 678                     chroma_avg, list0, list1, pixel_shift, chroma444);
 679 }
 680
 681 static inline void prefetch_motion(H264Context *h, int list, int pixel_shift, int chroma444){
 682     /* fetch pixels for estimated mv 4 macroblocks ahead
 683      * optimized for 64byte cache lines */
 684     MpegEncContext * const s = &h->s;
 685     const int refn = h->ref_cache[list][scan8[0]];
 686     if(refn >= 0){
 687         const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
 688         const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
 689         uint8_t **src = h->ref_list[list][refn].f.data;
 690         int off= (mx << pixel_shift) + (my + (s->mb_x&3)*4)*h->mb_linesize + (64 << pixel_shift);
 691         s->dsp.prefetch(src[0]+off, s->linesize, 4);
 692         if(chroma444){
 693             s->dsp.prefetch(src[1]+off, s->linesize, 4);
 694             s->dsp.prefetch(src[2]+off, s->linesize, 4);
 695         }else{
 696             off= (((mx>>1)+64)<<pixel_shift) + ((my>>1) + (s->mb_x&7))*s->uvlinesize;
 697             s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
 698         }
 699     }
 700 }
 701
 702 static av_always_inline void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 703                       qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
 704                       qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
 705                       h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 706                       int pixel_shift, int chroma444){
 707     MpegEncContext * const s = &h->s;
 708     const int mb_xy= h->mb_xy;
 709     const int mb_type = s->current_picture.f.mb_type[mb_xy];
 710
 711     assert(IS_INTER(mb_type));
 712
 713     if(HAVE_PTHREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
 714         await_references(h);
 715     prefetch_motion(h, 0, pixel_shift, chroma444);
 716
 717     if(IS_16X16(mb_type)){
 718         mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
 719                 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
 720                 weight_op, weight_avg,
 721                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1),
 722                 pixel_shift, chroma444);
 723     }else if(IS_16X8(mb_type)){
 724         mc_part(h, 0, 0, 4, 8 << pixel_shift, dest_y, dest_cb, dest_cr, 0, 0,
 725                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 726                 &weight_op[1], &weight_avg[1],
 727                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1),
 728                 pixel_shift, chroma444);
 729         mc_part(h, 8, 0, 4, 8 << pixel_shift, dest_y, dest_cb, dest_cr, 0, 4,
 730                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 731                 &weight_op[1], &weight_avg[1],
 732                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1),
 733                 pixel_shift, chroma444);
 734     }else if(IS_8X16(mb_type)){
 735         mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
 736                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 737                 &weight_op[2], &weight_avg[2],
 738                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1),
 739                 pixel_shift, chroma444);
 740         mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
 741                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 742                 &weight_op[2], &weight_avg[2],
 743                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1),
 744                 pixel_shift, chroma444);
 745     }else{
 746         int i;
 747
 748         assert(IS_8X8(mb_type));
 749
 750         for(i=0; i<4; i++){
 751             const int sub_mb_type= h->sub_mb_type[i];
 752             const int n= 4*i;
 753             int x_offset= (i&1)<<2;
 754             int y_offset= (i&2)<<1;
 755
 756             if(IS_SUB_8X8(sub_mb_type)){
 757                 mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 758                     qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 759                     &weight_op[3], &weight_avg[3],
 760                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 761                     pixel_shift, chroma444);
 762             }else if(IS_SUB_8X4(sub_mb_type)){
 763                 mc_part(h, n  , 0, 2, 4 << pixel_shift, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 764                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 765                     &weight_op[4], &weight_avg[4],
 766                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 767                     pixel_shift, chroma444);
 768                 mc_part(h, n+2, 0, 2, 4 << pixel_shift, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
 769                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 770                     &weight_op[4], &weight_avg[4],
 771                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 772                     pixel_shift, chroma444);
 773             }else if(IS_SUB_4X8(sub_mb_type)){
 774                 mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 775                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 776                     &weight_op[5], &weight_avg[5],
 777                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 778                     pixel_shift, chroma444);
 779                 mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
 780                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 781                     &weight_op[5], &weight_avg[5],
 782                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 783                     pixel_shift, chroma444);
 784             }else{
 785                 int j;
 786                 assert(IS_SUB_4X4(sub_mb_type));
 787                 for(j=0; j<4; j++){
 788                     int sub_x_offset= x_offset + 2*(j&1);
 789                     int sub_y_offset= y_offset +   (j&2);
 790                     mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
 791                         qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 792                         &weight_op[6], &weight_avg[6],
 793                         IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 794                         pixel_shift, chroma444);
 795                 }
 796             }
 797         }
 798     }
 799
 800     prefetch_motion(h, 1, pixel_shift, chroma444);
 801 }
 802
 803 static void free_tables(H264Context *h, int free_rbsp){
 804     int i;
 805     H264Context *hx;
 806
 807     av_freep(&h->intra4x4_pred_mode);
 808     av_freep(&h->chroma_pred_mode_table);
 809     av_freep(&h->cbp_table);
 810     av_freep(&h->mvd_table[0]);
 811     av_freep(&h->mvd_table[1]);
 812     av_freep(&h->direct_table);
 813     av_freep(&h->non_zero_count);
 814     av_freep(&h->slice_table_base);
 815     h->slice_table= NULL;
 816     av_freep(&h->list_counts);
 817
 818     av_freep(&h->mb2b_xy);
 819     av_freep(&h->mb2br_xy);
 820
 821     for(i = 0; i < MAX_THREADS; i++) {
 822         hx = h->thread_context[i];
 823         if(!hx) continue;
 824         av_freep(&hx->top_borders[1]);
 825         av_freep(&hx->top_borders[0]);
 826         av_freep(&hx->s.obmc_scratchpad);
 827         if (free_rbsp){
 828             av_freep(&hx->rbsp_buffer[1]);
 829             av_freep(&hx->rbsp_buffer[0]);
 830             hx->rbsp_buffer_size[0] = 0;
 831             hx->rbsp_buffer_size[1] = 0;
 832         }
 833         if (i) av_freep(&h->thread_context[i]);
 834     }
 835 }
 836
 837 static void init_dequant8_coeff_table(H264Context *h){
 838     int i,j,q,x;
 839     const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
 840
 841     for(i=0; i<6; i++ ){
 842         h->dequant8_coeff[i] = h->dequant8_buffer[i];
 843         for(j=0; j<i; j++){
 844             if(!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i], 64*sizeof(uint8_t))){
 845                 h->dequant8_coeff[i] = h->dequant8_buffer[j];
 846                 break;
 847             }
 848         }
 849         if(j<i)
 850             continue;
 851
 852         for(q=0; q<max_qp+1; q++){
 853             int shift = div6[q];
 854             int idx = rem6[q];
 855             for(x=0; x<64; x++)
 856                 h->dequant8_coeff[i][q][(x>>3)|((x&7)<<3)] =
 857                     ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
 858                     h->pps.scaling_matrix8[i][x]) << shift;
 859         }
 860     }
 861 }
 862
 863 static void init_dequant4_coeff_table(H264Context *h){
 864     int i,j,q,x;
 865     const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
 866     for(i=0; i<6; i++ ){
 867         h->dequant4_coeff[i] = h->dequant4_buffer[i];
 868         for(j=0; j<i; j++){
 869             if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
 870                 h->dequant4_coeff[i] = h->dequant4_buffer[j];
 871                 break;
 872             }
 873         }
 874         if(j<i)
 875             continue;
 876
 877         for(q=0; q<max_qp+1; q++){
 878             int shift = div6[q] + 2;
 879             int idx = rem6[q];
 880             for(x=0; x<16; x++)
 881                 h->dequant4_coeff[i][q][(x>>2)|((x<<2)&0xF)] =
 882                     ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
 883                     h->pps.scaling_matrix4[i][x]) << shift;
 884         }
 885     }
 886 }
 887
 888 static void init_dequant_tables(H264Context *h){
 889     int i,x;
 890     init_dequant4_coeff_table(h);
 891     if(h->pps.transform_8x8_mode)
 892         init_dequant8_coeff_table(h);
 893     if(h->sps.transform_bypass){
 894         for(i=0; i<6; i++)
 895             for(x=0; x<16; x++)
 896                 h->dequant4_coeff[i][0][x] = 1<<6;
 897         if(h->pps.transform_8x8_mode)
 898             for(i=0; i<6; i++)
 899                 for(x=0; x<64; x++)
 900                     h->dequant8_coeff[i][0][x] = 1<<6;
 901     }
 902 }
 903
 904
 905 int ff_h264_alloc_tables(H264Context *h){
 906     MpegEncContext * const s = &h->s;
 907     const int big_mb_num= s->mb_stride * (s->mb_height+1);
 908     const int row_mb_num= 2*s->mb_stride*s->avctx->thread_count;
 909     int x,y;
 910
 911     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, row_mb_num * 8  * sizeof(uint8_t), fail)
 912
 913     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 48 * sizeof(uint8_t), fail)
 914     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
 915     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
 916
 917     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
 918     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*row_mb_num * sizeof(uint8_t), fail);
 919     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*row_mb_num * sizeof(uint8_t), fail);
 920     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 4*big_mb_num * sizeof(uint8_t) , fail);
 921     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
 922
 923     memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
 924     h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
 925
 926     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
 927     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
 928     for(y=0; y<s->mb_height; y++){
 929         for(x=0; x<s->mb_width; x++){
 930             const int mb_xy= x + y*s->mb_stride;
 931             const int b_xy = 4*x + 4*y*h->b_stride;
 932
 933             h->mb2b_xy [mb_xy]= b_xy;
 934             h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
 935         }
 936     }
 937
 938     s->obmc_scratchpad = NULL;
 939
 940     if(!h->dequant4_coeff[0])
 941         init_dequant_tables(h);
 942
 943     return 0;
 944 fail:
 945     free_tables(h, 1);
 946     return -1;
 947 }
 948
 949 /**
 950  * Mimic alloc_tables(), but for every context thread.
 951  */
 952 static void clone_tables(H264Context *dst, H264Context *src, int i){
 953     MpegEncContext * const s = &src->s;
 954     dst->intra4x4_pred_mode       = src->intra4x4_pred_mode + i*8*2*s->mb_stride;
 955     dst->non_zero_count           = src->non_zero_count;
 956     dst->slice_table              = src->slice_table;
 957     dst->cbp_table                = src->cbp_table;
 958     dst->mb2b_xy                  = src->mb2b_xy;
 959     dst->mb2br_xy                 = src->mb2br_xy;
 960     dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
 961     dst->mvd_table[0]             = src->mvd_table[0] + i*8*2*s->mb_stride;
 962     dst->mvd_table[1]             = src->mvd_table[1] + i*8*2*s->mb_stride;
 963     dst->direct_table             = src->direct_table;
 964     dst->list_counts              = src->list_counts;
 965
 966     dst->s.obmc_scratchpad = NULL;
 967     ff_h264_pred_init(&dst->hpc, src->s.codec_id, src->sps.bit_depth_luma, src->sps.chroma_format_idc);
 968 }
 969
 970 /**
 971  * Init context
 972  * Allocate buffers which are not shared amongst multiple threads.
 973  */
 974 static int context_init(H264Context *h){
 975     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * 16*3 * sizeof(uint8_t)*2, fail)
 976     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * 16*3 * sizeof(uint8_t)*2, fail)
 977
 978     h->ref_cache[0][scan8[5 ]+1] = h->ref_cache[0][scan8[7 ]+1] = h->ref_cache[0][scan8[13]+1] =
 979     h->ref_cache[1][scan8[5 ]+1] = h->ref_cache[1][scan8[7 ]+1] = h->ref_cache[1][scan8[13]+1] = PART_NOT_AVAILABLE;
 980
 981     return 0;
 982 fail:
 983     return -1; // free_tables will clean up for us
 984 }
 985
 986 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
 987
 988 static av_cold void common_init(H264Context *h){
 989     MpegEncContext * const s = &h->s;
 990
 991     s->width = s->avctx->width;
 992     s->height = s->avctx->height;
 993     s->codec_id= s->avctx->codec->id;
 994
 995     s->avctx->bits_per_raw_sample = 8;
 996     h->cur_chroma_format_idc = 1;
 997
 998     ff_h264dsp_init(&h->h264dsp,
 999                     s->avctx->bits_per_raw_sample, h->cur_chroma_format_idc);
1000     ff_h264_pred_init(&h->hpc, s->codec_id,
1001                       s->avctx->bits_per_raw_sample, h->cur_chroma_format_idc);
1002
1003     h->dequant_coeff_pps= -1;
1004     s->unrestricted_mv=1;
1005     s->decode=1; //FIXME
1006
1007     s->dsp.dct_bits = 16;
1008     dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
1009
1010     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
1011     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
1012 }
1013
1014 int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size)
1015 {
1016     AVCodecContext *avctx = h->s.avctx;
1017
1018     if(!buf || size <= 0)
1019         return -1;
1020
1021     if(buf[0] == 1){
1022         int i, cnt, nalsize;
1023         const unsigned char *p = buf;
1024
1025         h->is_avc = 1;
1026
1027         if(size < 7) {
1028             av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
1029             return -1;
1030         }
1031         /* sps and pps in the avcC always have length coded with 2 bytes,
1032            so put a fake nal_length_size = 2 while parsing them */
1033         h->nal_length_size = 2;
1034         // Decode sps from avcC
1035         cnt = *(p+5) & 0x1f; // Number of sps
1036         p += 6;
1037         for (i = 0; i < cnt; i++) {
1038             nalsize = AV_RB16(p) + 2;
1039             if(nalsize > size - (p-buf))
1040                 return -1;
1041             if(decode_nal_units(h, p, nalsize) < 0) {
1042                 av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
1043                 return -1;
1044             }
1045             p += nalsize;
1046         }
1047         // Decode pps from avcC
1048         cnt = *(p++); // Number of pps
1049         for (i = 0; i < cnt; i++) {
1050             nalsize = AV_RB16(p) + 2;
1051             if(nalsize > size - (p-buf))
1052                 return -1;
1053             if (decode_nal_units(h, p, nalsize) < 0) {
1054                 av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
1055                 return -1;
1056             }
1057             p += nalsize;
1058         }
1059         // Now store right nal length size, that will be use to parse all other nals
1060         h->nal_length_size = (buf[4] & 0x03) + 1;
1061     } else {
1062         h->is_avc = 0;
1063         if(decode_nal_units(h, buf, size) < 0)
1064             return -1;
1065     }
1066     return 0;
1067 }
1068
1069 av_cold int ff_h264_decode_init(AVCodecContext *avctx){
1070     H264Context *h= avctx->priv_data;
1071     MpegEncContext * const s = &h->s;
1072
1073     MPV_decode_defaults(s);
1074
1075     s->avctx = avctx;
1076     common_init(h);
1077
1078     s->out_format = FMT_H264;
1079     s->workaround_bugs= avctx->workaround_bugs;
1080
1081     // set defaults
1082 //    s->decode_mb= ff_h263_decode_mb;
1083     s->quarter_sample = 1;
1084     if(!avctx->has_b_frames)
1085     s->low_delay= 1;
1086
1087     avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1088
1089     ff_h264_decode_init_vlc();
1090
1091     h->pixel_shift = 0;
1092     h->sps.bit_depth_luma = avctx->bits_per_raw_sample = 8;
1093
1094     h->thread_context[0] = h;
1095     h->outputed_poc = h->next_outputed_poc = INT_MIN;
1096     h->prev_poc_msb= 1<<16;
1097     h->x264_build = -1;
1098     ff_h264_reset_sei(h);
1099     if(avctx->codec_id == CODEC_ID_H264){
1100         if(avctx->ticks_per_frame == 1){
1101             s->avctx->time_base.den *=2;
1102         }
1103         avctx->ticks_per_frame = 2;
1104     }
1105
1106     if(avctx->extradata_size > 0 && avctx->extradata &&
1107         ff_h264_decode_extradata(h, avctx->extradata, avctx->extradata_size))
1108         return -1;
1109
1110     if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
1111         s->avctx->has_b_frames = h->sps.num_reorder_frames;
1112         s->low_delay = 0;
1113     }
1114
1115     return 0;
1116 }
1117
1118 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b)+(size))))
1119 static void copy_picture_range(Picture **to, Picture **from, int count, MpegEncContext *new_base, MpegEncContext *old_base)
1120 {
1121     int i;
1122
1123     for (i=0; i<count; i++){
1124         assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
1125                 IN_RANGE(from[i], old_base->picture, sizeof(Picture) * old_base->picture_count) ||
1126                 !from[i]));
1127         to[i] = REBASE_PICTURE(from[i], new_base, old_base);
1128     }
1129 }
1130
1131 static void copy_parameter_set(void **to, void **from, int count, int size)
1132 {
1133     int i;
1134
1135     for (i=0; i<count; i++){
1136         if (to[i] && !from[i]) av_freep(&to[i]);
1137         else if (from[i] && !to[i]) to[i] = av_malloc(size);
1138
1139         if (from[i]) memcpy(to[i], from[i], size);
1140     }
1141 }
1142
1143 static int decode_init_thread_copy(AVCodecContext *avctx){
1144     H264Context *h= avctx->priv_data;
1145
1146     if (!avctx->is_copy) return 0;
1147     memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1148     memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1149
1150     return 0;
1151 }
1152
1153 #define copy_fields(to, from, start_field, end_field) memcpy(&to->start_field, &from->start_field, (char*)&to->end_field - (char*)&to->start_field)
1154 static int decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src){
1155     H264Context *h= dst->priv_data, *h1= src->priv_data;
1156     MpegEncContext * const s = &h->s, * const s1 = &h1->s;
1157     int inited = s->context_initialized, err;
1158     int i;
1159
1160     if(dst == src || !s1->context_initialized) return 0;
1161
1162     err = ff_mpeg_update_thread_context(dst, src);
1163     if(err) return err;
1164
1165     //FIXME handle width/height changing
1166     if(!inited){
1167         for(i = 0; i < MAX_SPS_COUNT; i++)
1168             av_freep(h->sps_buffers + i);
1169
1170         for(i = 0; i < MAX_PPS_COUNT; i++)
1171             av_freep(h->pps_buffers + i);
1172
1173         memcpy(&h->s + 1, &h1->s + 1, sizeof(H264Context) - sizeof(MpegEncContext)); //copy all fields after MpegEnc
1174         memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1175         memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1176         if (ff_h264_alloc_tables(h) < 0) {
1177             av_log(dst, AV_LOG_ERROR, "Could not allocate memory for h264\n");
1178             return AVERROR(ENOMEM);
1179         }
1180         context_init(h);
1181
1182         for(i=0; i<2; i++){
1183             h->rbsp_buffer[i] = NULL;
1184             h->rbsp_buffer_size[i] = 0;
1185         }
1186
1187         h->thread_context[0] = h;
1188
1189         // frame_start may not be called for the next thread (if it's decoding a bottom field)
1190         // so this has to be allocated here
1191         h->s.obmc_scratchpad = av_malloc(16*6*s->linesize);
1192
1193         s->dsp.clear_blocks(h->mb);
1194         s->dsp.clear_blocks(h->mb+(24*16<<h->pixel_shift));
1195     }
1196
1197     //extradata/NAL handling
1198     h->is_avc          = h1->is_avc;
1199
1200     //SPS/PPS
1201     copy_parameter_set((void**)h->sps_buffers, (void**)h1->sps_buffers, MAX_SPS_COUNT, sizeof(SPS));
1202     h->sps             = h1->sps;
1203     copy_parameter_set((void**)h->pps_buffers, (void**)h1->pps_buffers, MAX_PPS_COUNT, sizeof(PPS));
1204     h->pps             = h1->pps;
1205
1206     //Dequantization matrices
1207     //FIXME these are big - can they be only copied when PPS changes?
1208     copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
1209
1210     for(i=0; i<6; i++)
1211         h->dequant4_coeff[i] = h->dequant4_buffer[0] + (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
1212
1213     for(i=0; i<6; i++)
1214         h->dequant8_coeff[i] = h->dequant8_buffer[0] + (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
1215
1216     h->dequant_coeff_pps = h1->dequant_coeff_pps;
1217
1218     //POC timing
1219     copy_fields(h, h1, poc_lsb, redundant_pic_count);
1220
1221     //reference lists
1222     copy_fields(h, h1, ref_count, list_count);
1223     copy_fields(h, h1, ref_list,  intra_gb);
1224     copy_fields(h, h1, short_ref, cabac_init_idc);
1225
1226     copy_picture_range(h->short_ref,   h1->short_ref,   32, s, s1);
1227     copy_picture_range(h->long_ref,    h1->long_ref,    32, s, s1);
1228     copy_picture_range(h->delayed_pic, h1->delayed_pic, MAX_DELAYED_PIC_COUNT+2, s, s1);
1229
1230     h->last_slice_type = h1->last_slice_type;
1231     h->sync            = h1->sync;
1232
1233     if(!s->current_picture_ptr) return 0;
1234
1235     if(!s->dropable) {
1236         err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1237         h->prev_poc_msb     = h->poc_msb;
1238         h->prev_poc_lsb     = h->poc_lsb;
1239     }
1240     h->prev_frame_num_offset= h->frame_num_offset;
1241     h->prev_frame_num       = h->frame_num;
1242     h->outputed_poc         = h->next_outputed_poc;
1243
1244     return err;
1245 }
1246
1247 int ff_h264_frame_start(H264Context *h){
1248     MpegEncContext * const s = &h->s;
1249     int i;
1250     const int pixel_shift = h->pixel_shift;
1251     int thread_count = (s->avctx->active_thread_type & FF_THREAD_SLICE) ? s->avctx->thread_count : 1;
1252
1253     if(MPV_frame_start(s, s->avctx) < 0)
1254         return -1;
1255     ff_er_frame_start(s);
1256     /*
1257      * MPV_frame_start uses pict_type to derive key_frame.
1258      * This is incorrect for H.264; IDR markings must be used.
1259      * Zero here; IDR markings per slice in frame or fields are ORed in later.
1260      * See decode_nal_units().
1261      */
1262     s->current_picture_ptr->f.key_frame = 0;
1263     s->current_picture_ptr->mmco_reset= 0;
1264
1265     assert(s->linesize && s->uvlinesize);
1266
1267     for(i=0; i<16; i++){
1268         h->block_offset[i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
1269         h->block_offset[48+i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
1270     }
1271     for(i=0; i<16; i++){
1272         h->block_offset[16+i]=
1273         h->block_offset[32+i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
1274         h->block_offset[48+16+i]=
1275         h->block_offset[48+32+i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
1276     }
1277
1278     /* can't be in alloc_tables because linesize isn't known there.
1279      * FIXME: redo bipred weight to not require extra buffer? */
1280     for(i = 0; i < thread_count; i++)
1281         if(h->thread_context[i] && !h->thread_context[i]->s.obmc_scratchpad)
1282             h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*6*s->linesize);
1283
1284     /* some macroblocks can be accessed before they're available in case of lost slices, mbaff or threading*/
1285     memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
1286
1287 //    s->decode = (s->flags & CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.f.reference /*|| h->contains_intra*/ || 1;
1288
1289     // We mark the current picture as non-reference after allocating it, so
1290     // that if we break out due to an error it can be released automatically
1291     // in the next MPV_frame_start().
1292     // SVQ3 as well as most other codecs have only last/next/current and thus
1293     // get released even with set reference, besides SVQ3 and others do not
1294     // mark frames as reference later "naturally".
1295     if(s->codec_id != CODEC_ID_SVQ3)
1296         s->current_picture_ptr->f.reference = 0;
1297
1298     s->current_picture_ptr->field_poc[0]=
1299     s->current_picture_ptr->field_poc[1]= INT_MAX;
1300
1301     h->next_output_pic = NULL;
1302
1303     assert(s->current_picture_ptr->long_ref==0);
1304
1305     return 0;
1306 }
1307
1308 /**
1309   * Run setup operations that must be run after slice header decoding.
1310   * This includes finding the next displayed frame.
1311   *
1312   * @param h h264 master context
1313   * @param setup_finished enough NALs have been read that we can call
1314   * ff_thread_finish_setup()
1315   */
1316 static void decode_postinit(H264Context *h, int setup_finished){
1317     MpegEncContext * const s = &h->s;
1318     Picture *out = s->current_picture_ptr;
1319     Picture *cur = s->current_picture_ptr;
1320     int i, pics, out_of_order, out_idx;
1321
1322     s->current_picture_ptr->f.qscale_type = FF_QSCALE_TYPE_H264;
1323     s->current_picture_ptr->f.pict_type   = s->pict_type;
1324
1325     if (h->next_output_pic) return;
1326
1327     if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
1328         //FIXME: if we have two PAFF fields in one packet, we can't start the next thread here.
1329         //If we have one field per packet, we can. The check in decode_nal_units() is not good enough
1330         //to find this yet, so we assume the worst for now.
1331         //if (setup_finished)
1332         //    ff_thread_finish_setup(s->avctx);
1333         return;
1334     }
1335
1336     cur->f.interlaced_frame = 0;
1337     cur->f.repeat_pict      = 0;
1338
1339     /* Signal interlacing information externally. */
1340     /* Prioritize picture timing SEI information over used decoding process if it exists. */
1341
1342     if(h->sps.pic_struct_present_flag){
1343         switch (h->sei_pic_struct)
1344         {
1345         case SEI_PIC_STRUCT_FRAME:
1346             break;
1347         case SEI_PIC_STRUCT_TOP_FIELD:
1348         case SEI_PIC_STRUCT_BOTTOM_FIELD:
1349             cur->f.interlaced_frame = 1;
1350             break;
1351         case SEI_PIC_STRUCT_TOP_BOTTOM:
1352         case SEI_PIC_STRUCT_BOTTOM_TOP:
1353             if (FIELD_OR_MBAFF_PICTURE)
1354                 cur->f.interlaced_frame = 1;
1355             else
1356                 // try to flag soft telecine progressive
1357                 cur->f.interlaced_frame = h->prev_interlaced_frame;
1358             break;
1359         case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
1360         case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
1361             // Signal the possibility of telecined film externally (pic_struct 5,6)
1362             // From these hints, let the applications decide if they apply deinterlacing.
1363             cur->f.repeat_pict = 1;
1364             break;
1365         case SEI_PIC_STRUCT_FRAME_DOUBLING:
1366             // Force progressive here, as doubling interlaced frame is a bad idea.
1367             cur->f.repeat_pict = 2;
1368             break;
1369         case SEI_PIC_STRUCT_FRAME_TRIPLING:
1370             cur->f.repeat_pict = 4;
1371             break;
1372         }
1373
1374         if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
1375             cur->f.interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
1376     }else{
1377         /* Derive interlacing flag from used decoding process. */
1378         cur->f.interlaced_frame = FIELD_OR_MBAFF_PICTURE;
1379     }
1380     h->prev_interlaced_frame = cur->f.interlaced_frame;
1381
1382     if (cur->field_poc[0] != cur->field_poc[1]){
1383         /* Derive top_field_first from field pocs. */
1384         cur->f.top_field_first = cur->field_poc[0] < cur->field_poc[1];
1385     }else{
1386         if (cur->f.interlaced_frame || h->sps.pic_struct_present_flag) {
1387             /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
1388             if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
1389               || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
1390                 cur->f.top_field_first = 1;
1391             else
1392                 cur->f.top_field_first = 0;
1393         }else{
1394             /* Most likely progressive */
1395             cur->f.top_field_first = 0;
1396         }
1397     }
1398
1399     //FIXME do something with unavailable reference frames
1400
1401     /* Sort B-frames into display order */
1402
1403     if(h->sps.bitstream_restriction_flag
1404        && s->avctx->has_b_frames < h->sps.num_reorder_frames){
1405         s->avctx->has_b_frames = h->sps.num_reorder_frames;
1406         s->low_delay = 0;
1407     }
1408
1409     if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
1410        && !h->sps.bitstream_restriction_flag){
1411         s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
1412         s->low_delay= 0;
1413     }
1414
1415     pics = 0;
1416     while(h->delayed_pic[pics]) pics++;
1417
1418     av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
1419
1420     h->delayed_pic[pics++] = cur;
1421     if (cur->f.reference == 0)
1422         cur->f.reference = DELAYED_PIC_REF;
1423
1424     out = h->delayed_pic[0];
1425     out_idx = 0;
1426     for (i = 1; h->delayed_pic[i] && !h->delayed_pic[i]->f.key_frame && !h->delayed_pic[i]->mmco_reset; i++)
1427         if(h->delayed_pic[i]->poc < out->poc){
1428             out = h->delayed_pic[i];
1429             out_idx = i;
1430         }
1431     if (s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset))
1432         h->next_outputed_poc= INT_MIN;
1433     out_of_order = out->poc < h->next_outputed_poc;
1434
1435     if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
1436         { }
1437     else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
1438        || (s->low_delay &&
1439         ((h->next_outputed_poc != INT_MIN && out->poc > h->next_outputed_poc + 2)
1440          || cur->f.pict_type == AV_PICTURE_TYPE_B)))
1441     {
1442         s->low_delay = 0;
1443         s->avctx->has_b_frames++;
1444     }
1445
1446     if(out_of_order || pics > s->avctx->has_b_frames){
1447         out->f.reference &= ~DELAYED_PIC_REF;
1448         out->owner2 = s; // for frame threading, the owner must be the second field's thread
1449                          // or else the first thread can release the picture and reuse it unsafely
1450         for(i=out_idx; h->delayed_pic[i]; i++)
1451             h->delayed_pic[i] = h->delayed_pic[i+1];
1452     }
1453     if(!out_of_order && pics > s->avctx->has_b_frames){
1454         h->next_output_pic = out;
1455         if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset)) {
1456             h->next_outputed_poc = INT_MIN;
1457         } else
1458             h->next_outputed_poc = out->poc;
1459     }else{
1460         av_log(s->avctx, AV_LOG_DEBUG, "no picture\n");
1461     }
1462
1463     if (h->next_output_pic && h->next_output_pic->sync) {
1464         h->sync |= 2;
1465     }
1466
1467     if (setup_finished)
1468         ff_thread_finish_setup(s->avctx);
1469 }
1470
1471 static av_always_inline void backup_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int simple){
1472     MpegEncContext * const s = &h->s;
1473     uint8_t *top_border;
1474     int top_idx = 1;
1475     const int pixel_shift = h->pixel_shift;
1476     int chroma444 = CHROMA444;
1477     int chroma422 = CHROMA422;
1478
1479     src_y  -=   linesize;
1480     src_cb -= uvlinesize;
1481     src_cr -= uvlinesize;
1482
1483     if(!simple && FRAME_MBAFF){
1484         if(s->mb_y&1){
1485             if(!MB_MBAFF){
1486                 top_border = h->top_borders[0][s->mb_x];
1487                 AV_COPY128(top_border, src_y + 15*linesize);
1488                 if (pixel_shift)
1489                     AV_COPY128(top_border+16, src_y+15*linesize+16);
1490                 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1491                     if(chroma444){
1492                         if (pixel_shift){
1493                             AV_COPY128(top_border+32, src_cb + 15*uvlinesize);
1494                             AV_COPY128(top_border+48, src_cb + 15*uvlinesize+16);
1495                             AV_COPY128(top_border+64, src_cr + 15*uvlinesize);
1496                             AV_COPY128(top_border+80, src_cr + 15*uvlinesize+16);
1497                         } else {
1498                             AV_COPY128(top_border+16, src_cb + 15*uvlinesize);
1499                             AV_COPY128(top_border+32, src_cr + 15*uvlinesize);
1500                         }
1501                     } else if(chroma422){
1502                         if (pixel_shift) {
1503                             AV_COPY128(top_border+32, src_cb + 15*uvlinesize);
1504                             AV_COPY128(top_border+48, src_cr + 15*uvlinesize);
1505                         } else {
1506                             AV_COPY64(top_border+16, src_cb +  15*uvlinesize);
1507                             AV_COPY64(top_border+24, src_cr +  15*uvlinesize);
1508                         }
1509                     } else {
1510                         if (pixel_shift) {
1511                             AV_COPY128(top_border+32, src_cb+7*uvlinesize);
1512                             AV_COPY128(top_border+48, src_cr+7*uvlinesize);
1513                         } else {
1514                             AV_COPY64(top_border+16, src_cb+7*uvlinesize);
1515                             AV_COPY64(top_border+24, src_cr+7*uvlinesize);
1516                         }
1517                     }
1518                 }
1519             }
1520         }else if(MB_MBAFF){
1521             top_idx = 0;
1522         }else
1523             return;
1524     }
1525
1526     top_border = h->top_borders[top_idx][s->mb_x];
1527     // There are two lines saved, the line above the the top macroblock of a pair,
1528     // and the line above the bottom macroblock
1529     AV_COPY128(top_border, src_y + 16*linesize);
1530     if (pixel_shift)
1531         AV_COPY128(top_border+16, src_y+16*linesize+16);
1532
1533     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1534         if(chroma444){
1535             if (pixel_shift){
1536                 AV_COPY128(top_border+32, src_cb + 16*linesize);
1537                 AV_COPY128(top_border+48, src_cb + 16*linesize+16);
1538                 AV_COPY128(top_border+64, src_cr + 16*linesize);
1539                 AV_COPY128(top_border+80, src_cr + 16*linesize+16);
1540             } else {
1541                 AV_COPY128(top_border+16, src_cb + 16*linesize);
1542                 AV_COPY128(top_border+32, src_cr + 16*linesize);
1543             }
1544         } else if(chroma422) {
1545             if (pixel_shift) {
1546                 AV_COPY128(top_border+32, src_cb+16*uvlinesize);
1547                 AV_COPY128(top_border+48, src_cr+16*uvlinesize);
1548             } else {
1549                 AV_COPY64(top_border+16, src_cb+16*uvlinesize);
1550                 AV_COPY64(top_border+24, src_cr+16*uvlinesize);
1551             }
1552         } else {
1553             if (pixel_shift) {
1554                 AV_COPY128(top_border+32, src_cb+8*uvlinesize);
1555                 AV_COPY128(top_border+48, src_cr+8*uvlinesize);
1556             } else {
1557                 AV_COPY64(top_border+16, src_cb+8*uvlinesize);
1558                 AV_COPY64(top_border+24, src_cr+8*uvlinesize);
1559             }
1560         }
1561     }
1562 }
1563
1564 static av_always_inline void xchg_mb_border(H264Context *h, uint8_t *src_y,
1565                                   uint8_t *src_cb, uint8_t *src_cr,
1566                                   int linesize, int uvlinesize,
1567                                   int xchg, int chroma444,
1568                                   int simple, int pixel_shift){
1569     MpegEncContext * const s = &h->s;
1570     int deblock_topleft;
1571     int deblock_top;
1572     int top_idx = 1;
1573     uint8_t *top_border_m1;
1574     uint8_t *top_border;
1575
1576     if(!simple && FRAME_MBAFF){
1577         if(s->mb_y&1){
1578             if(!MB_MBAFF)
1579                 return;
1580         }else{
1581             top_idx = MB_MBAFF ? 0 : 1;
1582         }
1583     }
1584
1585     if(h->deblocking_filter == 2) {
1586         deblock_topleft = h->slice_table[h->mb_xy - 1 - s->mb_stride] == h->slice_num;
1587         deblock_top     = h->top_type;
1588     } else {
1589         deblock_topleft = (s->mb_x > 0);
1590         deblock_top     = (s->mb_y > !!MB_FIELD);
1591     }
1592
1593     src_y  -=   linesize + 1 + pixel_shift;
1594     src_cb -= uvlinesize + 1 + pixel_shift;
1595     src_cr -= uvlinesize + 1 + pixel_shift;
1596
1597     top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1598     top_border    = h->top_borders[top_idx][s->mb_x];
1599
1600 #define XCHG(a,b,xchg)\
1601     if (pixel_shift) {\
1602         if (xchg) {\
1603             AV_SWAP64(b+0,a+0);\
1604             AV_SWAP64(b+8,a+8);\
1605         } else {\
1606             AV_COPY128(b,a); \
1607         }\
1608     } else \
1609 if (xchg) AV_SWAP64(b,a);\
1610 else      AV_COPY64(b,a);
1611
1612     if(deblock_top){
1613         if(deblock_topleft){
1614             XCHG(top_border_m1 + (8 << pixel_shift), src_y - (7 << pixel_shift), 1);
1615         }
1616         XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);
1617         XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);
1618         if(s->mb_x+1 < s->mb_width){
1619             XCHG(h->top_borders[top_idx][s->mb_x+1], src_y + (17 << pixel_shift), 1);
1620         }
1621     }
1622     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1623         if(chroma444){
1624             if(deblock_topleft){
1625                 XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);
1626                 XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);
1627             }
1628             XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);
1629             XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);
1630             XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);
1631             XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);
1632             if(s->mb_x+1 < s->mb_width){
1633                 XCHG(h->top_borders[top_idx][s->mb_x+1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);
1634                 XCHG(h->top_borders[top_idx][s->mb_x+1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);
1635             }
1636         } else {
1637             if(deblock_top){
1638                 if(deblock_topleft){
1639                     XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);
1640                     XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);
1641                 }
1642                 XCHG(top_border + (16 << pixel_shift), src_cb+1+pixel_shift, 1);
1643                 XCHG(top_border + (24 << pixel_shift), src_cr+1+pixel_shift, 1);
1644             }
1645         }
1646     }
1647 }
1648
1649 static av_always_inline int dctcoef_get(DCTELEM *mb, int high_bit_depth, int index) {
1650     if (high_bit_depth) {
1651         return AV_RN32A(((int32_t*)mb) + index);
1652     } else
1653         return AV_RN16A(mb + index);
1654 }
1655
1656 static av_always_inline void dctcoef_set(DCTELEM *mb, int high_bit_depth, int index, int value) {
1657     if (high_bit_depth) {
1658         AV_WN32A(((int32_t*)mb) + index, value);
1659     } else
1660         AV_WN16A(mb + index, value);
1661 }
1662
1663 static av_always_inline void hl_decode_mb_predict_luma(H264Context *h, int mb_type, int is_h264, int simple, int transform_bypass,
1664                                                        int pixel_shift, int *block_offset, int linesize, uint8_t *dest_y, int p)
1665 {
1666     MpegEncContext * const s = &h->s;
1667     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1668     void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1669     int i;
1670     int qscale = p == 0 ? s->qscale : h->chroma_qp[p-1];
1671     block_offset += 16*p;
1672     if(IS_INTRA4x4(mb_type)){
1673         if(simple || !s->encoding){
1674             if(IS_8x8DCT(mb_type)){
1675                 if(transform_bypass){
1676                     idct_dc_add =
1677                     idct_add    = s->dsp.add_pixels8;
1678                 }else{
1679                     idct_dc_add = h->h264dsp.h264_idct8_dc_add;
1680                     idct_add    = h->h264dsp.h264_idct8_add;
1681                 }
1682                 for(i=0; i<16; i+=4){
1683                     uint8_t * const ptr= dest_y + block_offset[i];
1684                     const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1685                     if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1686                         h->hpc.pred8x8l_add[dir](ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1687                     }else{
1688                         const int nnz = h->non_zero_count_cache[ scan8[i+p*16] ];
1689                         h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1690                                                     (h->topright_samples_available<<i)&0x4000, linesize);
1691                         if(nnz){
1692                             if(nnz == 1 && dctcoef_get(h->mb, pixel_shift, i*16+p*256))
1693                                 idct_dc_add(ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1694                             else
1695                                 idct_add   (ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1696                         }
1697                     }
1698                 }
1699             }else{
1700                 if(transform_bypass){
1701                     idct_dc_add =
1702                     idct_add    = s->dsp.add_pixels4;
1703                 }else{
1704                     idct_dc_add = h->h264dsp.h264_idct_dc_add;
1705                     idct_add    = h->h264dsp.h264_idct_add;
1706                 }
1707                 for(i=0; i<16; i++){
1708                     uint8_t * const ptr= dest_y + block_offset[i];
1709                     const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1710
1711                     if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1712                         h->hpc.pred4x4_add[dir](ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1713                     }else{
1714                         uint8_t *topright;
1715                         int nnz, tr;
1716                         uint64_t tr_high;
1717                         if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1718                             const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1719                             assert(s->mb_y || linesize <= block_offset[i]);
1720                             if(!topright_avail){
1721                                 if (pixel_shift) {
1722                                     tr_high= ((uint16_t*)ptr)[3 - linesize/2]*0x0001000100010001ULL;
1723                                     topright= (uint8_t*) &tr_high;
1724                                 } else {
1725                                     tr= ptr[3 - linesize]*0x01010101;
1726                                     topright= (uint8_t*) &tr;
1727                                 }
1728                             }else
1729                                 topright= ptr + (4 << pixel_shift) - linesize;
1730                         }else
1731                             topright= NULL;
1732
1733                         h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1734                         nnz = h->non_zero_count_cache[ scan8[i+p*16] ];
1735                         if(nnz){
1736                             if(is_h264){
1737                                 if(nnz == 1 && dctcoef_get(h->mb, pixel_shift, i*16+p*256))
1738                                     idct_dc_add(ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1739                                 else
1740                                     idct_add   (ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1741                             }else
1742                                 ff_svq3_add_idct_c(ptr, h->mb + i*16+p*256, linesize, qscale, 0);
1743                         }
1744                     }
1745                 }
1746             }
1747         }
1748     }else{
1749         h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1750         if(is_h264){
1751             if(h->non_zero_count_cache[ scan8[LUMA_DC_BLOCK_INDEX+p] ]){
1752                 if(!transform_bypass)
1753                     h->h264dsp.h264_luma_dc_dequant_idct(h->mb+(p*256 << pixel_shift), h->mb_luma_dc[p], h->dequant4_coeff[p][qscale][0]);
1754                 else{
1755                     static const uint8_t dc_mapping[16] = { 0*16, 1*16, 4*16, 5*16, 2*16, 3*16, 6*16, 7*16,
1756                                                             8*16, 9*16,12*16,13*16,10*16,11*16,14*16,15*16};
1757                     for(i = 0; i < 16; i++)
1758                         dctcoef_set(h->mb+p*256, pixel_shift, dc_mapping[i], dctcoef_get(h->mb_luma_dc[p], pixel_shift, i));
1759                 }
1760             }
1761         }else
1762             ff_svq3_luma_dc_dequant_idct_c(h->mb+p*256, h->mb_luma_dc[p], qscale);
1763     }
1764 }
1765
1766 static av_always_inline void hl_decode_mb_idct_luma(H264Context *h, int mb_type, int is_h264, int simple, int transform_bypass,
1767                                                     int pixel_shift, int *block_offset, int linesize, uint8_t *dest_y, int p)
1768 {
1769     MpegEncContext * const s = &h->s;
1770     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1771     int i;
1772     block_offset += 16*p;
1773     if(!IS_INTRA4x4(mb_type)){
1774         if(is_h264){
1775             if(IS_INTRA16x16(mb_type)){
1776                 if(transform_bypass){
1777                     if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1778                         h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize);
1779                     }else{
1780                         for(i=0; i<16; i++){
1781                             if(h->non_zero_count_cache[ scan8[i+p*16] ] || dctcoef_get(h->mb, pixel_shift, i*16+p*256))
1782                                 s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + (i*16+p*256 << pixel_shift), linesize);
1783                         }
1784                     }
1785                 }else{
1786                     h->h264dsp.h264_idct_add16intra(dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize, h->non_zero_count_cache+p*5*8);
1787                 }
1788             }else if(h->cbp&15){
1789                 if(transform_bypass){
1790                     const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1791                     idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1792                     for(i=0; i<16; i+=di){
1793                         if(h->non_zero_count_cache[ scan8[i+p*16] ]){
1794                             idct_add(dest_y + block_offset[i], h->mb + (i*16+p*256 << pixel_shift), linesize);
1795                         }
1796                     }
1797                 }else{
1798                     if(IS_8x8DCT(mb_type)){
1799                         h->h264dsp.h264_idct8_add4(dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize, h->non_zero_count_cache+p*5*8);
1800                     }else{
1801                         h->h264dsp.h264_idct_add16(dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize, h->non_zero_count_cache+p*5*8);
1802                     }
1803                 }
1804             }
1805         }else{
1806             for(i=0; i<16; i++){
1807                 if(h->non_zero_count_cache[ scan8[i+p*16] ] || h->mb[i*16+p*256]){ //FIXME benchmark weird rule, & below
1808                     uint8_t * const ptr= dest_y + block_offset[i];
1809                     ff_svq3_add_idct_c(ptr, h->mb + i*16 + p*256, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1810                 }
1811             }
1812         }
1813     }
1814 }
1815
1816 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple, int pixel_shift){
1817     MpegEncContext * const s = &h->s;
1818     const int mb_x= s->mb_x;
1819     const int mb_y= s->mb_y;
1820     const int mb_xy= h->mb_xy;
1821     const int mb_type = s->current_picture.f.mb_type[mb_xy];
1822     uint8_t  *dest_y, *dest_cb, *dest_cr;
1823     int linesize, uvlinesize /*dct_offset*/;
1824     int i, j;
1825     int *block_offset = &h->block_offset[0];
1826     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1827     /* is_h264 should always be true if SVQ3 is disabled. */
1828     const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1829     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1830     const int block_h = 16>>s->chroma_y_shift;
1831
1832     dest_y  = s->current_picture.f.data[0] + ((mb_x << pixel_shift) + mb_y * s->linesize  ) * 16;
1833     dest_cb = s->current_picture.f.data[1] + (mb_x << pixel_shift)*8 + mb_y * s->uvlinesize * block_h;
1834     dest_cr = s->current_picture.f.data[2] + (mb_x << pixel_shift)*8 + mb_y * s->uvlinesize * block_h;
1835
1836     s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + (64 << pixel_shift), s->linesize, 4);
1837     s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + (64 << pixel_shift), dest_cr - dest_cb, 2);
1838
1839     h->list_counts[mb_xy]= h->list_count;
1840
1841     if (!simple && MB_FIELD) {
1842         linesize   = h->mb_linesize   = s->linesize * 2;
1843         uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1844         block_offset = &h->block_offset[48];
1845         if(mb_y&1){ //FIXME move out of this function?
1846             dest_y -= s->linesize*15;
1847             dest_cb-= s->uvlinesize*(block_h-1);
1848             dest_cr-= s->uvlinesize*(block_h-1);
1849         }
1850         if(FRAME_MBAFF) {
1851             int list;
1852             for(list=0; list<h->list_count; list++){
1853                 if(!USES_LIST(mb_type, list))
1854                     continue;
1855                 if(IS_16X16(mb_type)){
1856                     int8_t *ref = &h->ref_cache[list][scan8[0]];
1857                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1858                 }else{
1859                     for(i=0; i<16; i+=4){
1860                         int ref = h->ref_cache[list][scan8[i]];
1861                         if(ref >= 0)
1862                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1863                     }
1864                 }
1865             }
1866         }
1867     } else {
1868         linesize   = h->mb_linesize   = s->linesize;
1869         uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1870 //        dct_offset = s->linesize * 16;
1871     }
1872
1873     if (!simple && IS_INTRA_PCM(mb_type)) {
1874         const int bit_depth = h->sps.bit_depth_luma;
1875         if (pixel_shift) {
1876             int j;
1877             GetBitContext gb;
1878             init_get_bits(&gb, (uint8_t*)h->mb, 384*bit_depth);
1879
1880             for (i = 0; i < 16; i++) {
1881                 uint16_t *tmp_y  = (uint16_t*)(dest_y  + i*linesize);
1882                 for (j = 0; j < 16; j++)
1883                     tmp_y[j] = get_bits(&gb, bit_depth);
1884             }
1885             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1886                 if (!h->sps.chroma_format_idc) {
1887                     for (i = 0; i < 8; i++) {
1888                         uint16_t *tmp_cb = (uint16_t*)(dest_cb + i*uvlinesize);
1889                         uint16_t *tmp_cr = (uint16_t*)(dest_cr + i*uvlinesize);
1890                         for (j = 0; j < 8; j++) {
1891                             tmp_cb[j] = tmp_cr[j] = 1 << (bit_depth - 1);
1892                         }
1893                     }
1894                 } else {
1895                     for (i = 0; i < block_h; i++) {
1896                         uint16_t *tmp_cb = (uint16_t*)(dest_cb + i*uvlinesize);
1897                         for (j = 0; j < 8; j++)
1898                             tmp_cb[j] = get_bits(&gb, bit_depth);
1899                     }
1900                     for (i = 0; i < block_h; i++) {
1901                         uint16_t *tmp_cr = (uint16_t*)(dest_cr + i*uvlinesize);
1902                         for (j = 0; j < 8; j++)
1903                             tmp_cr[j] = get_bits(&gb, bit_depth);
1904                     }
1905                 }
1906             }
1907         } else {
1908             for (i=0; i<16; i++) {
1909                 memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1910             }
1911             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1912                 if (!h->sps.chroma_format_idc) {
1913                     for (i=0; i<8; i++) {
1914                         memset(dest_cb+ i*uvlinesize, 1 << (bit_depth - 1), 8);
1915                         memset(dest_cr+ i*uvlinesize, 1 << (bit_depth - 1), 8);
1916                     }
1917                 } else {
1918                     for (i=0; i<block_h; i++) {
1919                         memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
1920                         memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
1921                     }
1922                 }
1923             }
1924         }
1925     } else {
1926         if(IS_INTRA(mb_type)){
1927             if(h->deblocking_filter)
1928                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, 0, simple, pixel_shift);
1929
1930             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1931                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1932                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1933             }
1934
1935             hl_decode_mb_predict_luma(h, mb_type, is_h264, simple, transform_bypass, pixel_shift, block_offset, linesize, dest_y, 0);
1936
1937             if(h->deblocking_filter)
1938                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, 0, simple, pixel_shift);
1939         }else if(is_h264){
1940             hl_motion(h, dest_y, dest_cb, dest_cr,
1941                       s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1942                       s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1943                       h->h264dsp.weight_h264_pixels_tab,
1944                       h->h264dsp.biweight_h264_pixels_tab, pixel_shift, 0);
1945         }
1946
1947         hl_decode_mb_idct_luma(h, mb_type, is_h264, simple, transform_bypass, pixel_shift, block_offset, linesize, dest_y, 0);
1948
1949         if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1950             uint8_t *dest[2] = {dest_cb, dest_cr};
1951             if(transform_bypass){
1952                 if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1953                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + (16*16*1 << pixel_shift), uvlinesize);
1954                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 32, h->mb + (16*16*2 << pixel_shift), uvlinesize);
1955                 }else{
1956                     idct_add = s->dsp.add_pixels4;
1957                     for(j=1; j<3; j++){
1958                         for(i=j*16; i<j*16+4; i++){
1959                             if(h->non_zero_count_cache[ scan8[i] ] || dctcoef_get(h->mb, pixel_shift, i*16))
1960                                 idct_add   (dest[j-1] + block_offset[i], h->mb + (i*16 << pixel_shift), uvlinesize);
1961                         }
1962                     }
1963                 }
1964             }else{
1965                 if(is_h264){
1966                     int qp[2];
1967                     if (CHROMA422) {
1968                         qp[0] = h->chroma_qp[0]+3;
1969                         qp[1] = h->chroma_qp[1]+3;
1970                     } else {
1971                         qp[0] = h->chroma_qp[0];
1972                         qp[1] = h->chroma_qp[1];
1973                     }
1974                     if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+0] ])
1975                         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]);
1976                     if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+1] ])
1977                         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]);
1978                     h->h264dsp.h264_idct_add8(dest, block_offset,
1979                                               h->mb, uvlinesize,
1980                                               h->non_zero_count_cache);
1981                 }
1982 #if CONFIG_SVQ3_DECODER
1983                 else{
1984                     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]);
1985                     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]);
1986                     for(j=1; j<3; j++){
1987                         for(i=j*16; i<j*16+4; i++){
1988                             if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1989                                 uint8_t * const ptr= dest[j-1] + block_offset[i];
1990                                 ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[0][s->qscale + 12] - 12, 2);
1991                             }
1992                         }
1993                     }
1994                 }
1995 #endif
1996             }
1997         }
1998     }
1999     if(h->cbp || IS_INTRA(mb_type))
2000     {
2001         s->dsp.clear_blocks(h->mb);
2002         s->dsp.clear_blocks(h->mb+(24*16<<pixel_shift));
2003     }
2004 }
2005
2006 static av_always_inline void hl_decode_mb_444_internal(H264Context *h, int simple, int pixel_shift){
2007     MpegEncContext * const s = &h->s;
2008     const int mb_x= s->mb_x;
2009     const int mb_y= s->mb_y;
2010     const int mb_xy= h->mb_xy;
2011     const int mb_type = s->current_picture.f.mb_type[mb_xy];
2012     uint8_t  *dest[3];
2013     int linesize;
2014     int i, j, p;
2015     int *block_offset = &h->block_offset[0];
2016     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
2017     const int plane_count = (simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) ? 3 : 1;
2018
2019     for (p = 0; p < plane_count; p++)
2020     {
2021         dest[p] = s->current_picture.f.data[p] + ((mb_x << pixel_shift) + mb_y * s->linesize) * 16;
2022         s->dsp.prefetch(dest[p] + (s->mb_x&3)*4*s->linesize + (64 << pixel_shift), s->linesize, 4);
2023     }
2024
2025     h->list_counts[mb_xy]= h->list_count;
2026
2027     if (!simple && MB_FIELD) {
2028         linesize   = h->mb_linesize = h->mb_uvlinesize = s->linesize * 2;
2029         block_offset = &h->block_offset[48];
2030         if(mb_y&1) //FIXME move out of this function?
2031             for (p = 0; p < 3; p++)
2032                 dest[p] -= s->linesize*15;
2033         if(FRAME_MBAFF) {
2034             int list;
2035             for(list=0; list<h->list_count; list++){
2036                 if(!USES_LIST(mb_type, list))
2037                     continue;
2038                 if(IS_16X16(mb_type)){
2039                     int8_t *ref = &h->ref_cache[list][scan8[0]];
2040                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
2041                 }else{
2042                     for(i=0; i<16; i+=4){
2043                         int ref = h->ref_cache[list][scan8[i]];
2044                         if(ref >= 0)
2045                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
2046                     }
2047                 }
2048             }
2049         }
2050     } else {
2051         linesize   = h->mb_linesize = h->mb_uvlinesize = s->linesize;
2052     }
2053
2054     if (!simple && IS_INTRA_PCM(mb_type)) {
2055         if (pixel_shift) {
2056             const int bit_depth = h->sps.bit_depth_luma;
2057             GetBitContext gb;
2058             init_get_bits(&gb, (uint8_t*)h->mb, 768*bit_depth);
2059
2060             for (p = 0; p < plane_count; p++) {
2061                 for (i = 0; i < 16; i++) {
2062                     uint16_t *tmp = (uint16_t*)(dest[p] + i*linesize);
2063                     for (j = 0; j < 16; j++)
2064                         tmp[j] = get_bits(&gb, bit_depth);
2065                 }
2066             }
2067         } else {
2068             for (p = 0; p < plane_count; p++) {
2069                 for (i = 0; i < 16; i++) {
2070                     memcpy(dest[p] + i*linesize, h->mb + p*128 + i*8, 16);
2071                 }
2072             }
2073         }
2074     } else {
2075         if(IS_INTRA(mb_type)){
2076             if(h->deblocking_filter)
2077                 xchg_mb_border(h, dest[0], dest[1], dest[2], linesize, linesize, 1, 1, simple, pixel_shift);
2078
2079             for (p = 0; p < plane_count; p++)
2080                 hl_decode_mb_predict_luma(h, mb_type, 1, simple, transform_bypass, pixel_shift, block_offset, linesize, dest[p], p);
2081
2082             if(h->deblocking_filter)
2083                 xchg_mb_border(h, dest[0], dest[1], dest[2], linesize, linesize, 0, 1, simple, pixel_shift);
2084         }else{
2085             hl_motion(h, dest[0], dest[1], dest[2],
2086                       s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2087                       s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2088                       h->h264dsp.weight_h264_pixels_tab,
2089                       h->h264dsp.biweight_h264_pixels_tab, pixel_shift, 1);
2090         }
2091
2092         for (p = 0; p < plane_count; p++)
2093             hl_decode_mb_idct_luma(h, mb_type, 1, simple, transform_bypass, pixel_shift, block_offset, linesize, dest[p], p);
2094     }
2095     if(h->cbp || IS_INTRA(mb_type))
2096     {
2097         s->dsp.clear_blocks(h->mb);
2098         s->dsp.clear_blocks(h->mb+(24*16<<pixel_shift));
2099     }
2100 }
2101
2102 /**
2103  * Process a macroblock; this case avoids checks for expensive uncommon cases.
2104  */
2105 #define hl_decode_mb_simple(sh, bits) \
2106 static void hl_decode_mb_simple_ ## bits(H264Context *h){ \
2107     hl_decode_mb_internal(h, 1, sh); \
2108 }
2109 hl_decode_mb_simple(0, 8);
2110 hl_decode_mb_simple(1, 16);
2111
2112 /**
2113  * Process a macroblock; this handles edge cases, such as interlacing.
2114  */
2115 static void av_noinline hl_decode_mb_complex(H264Context *h){
2116     hl_decode_mb_internal(h, 0, h->pixel_shift);
2117 }
2118
2119 static void av_noinline hl_decode_mb_444_complex(H264Context *h){
2120     hl_decode_mb_444_internal(h, 0, h->pixel_shift);
2121 }
2122
2123 static void av_noinline hl_decode_mb_444_simple(H264Context *h){
2124     hl_decode_mb_444_internal(h, 1, 0);
2125 }
2126
2127 void ff_h264_hl_decode_mb(H264Context *h){
2128     MpegEncContext * const s = &h->s;
2129     const int mb_xy= h->mb_xy;
2130     const int mb_type = s->current_picture.f.mb_type[mb_xy];
2131     int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
2132
2133     if (CHROMA444) {
2134         if(is_complex || h->pixel_shift)
2135             hl_decode_mb_444_complex(h);
2136         else
2137             hl_decode_mb_444_simple(h);
2138     } else if (is_complex) {
2139         hl_decode_mb_complex(h);
2140     } else if (h->pixel_shift) {
2141         hl_decode_mb_simple_16(h);
2142     } else
2143         hl_decode_mb_simple_8(h);
2144 }
2145
2146 static int pred_weight_table(H264Context *h){
2147     MpegEncContext * const s = &h->s;
2148     int list, i;
2149     int luma_def, chroma_def;
2150
2151     h->use_weight= 0;
2152     h->use_weight_chroma= 0;
2153     h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
2154     if(h->sps.chroma_format_idc)
2155         h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
2156     luma_def = 1<<h->luma_log2_weight_denom;
2157     chroma_def = 1<<h->chroma_log2_weight_denom;
2158
2159     for(list=0; list<2; list++){
2160         h->luma_weight_flag[list]   = 0;
2161         h->chroma_weight_flag[list] = 0;
2162         for(i=0; i<h->ref_count[list]; i++){
2163             int luma_weight_flag, chroma_weight_flag;
2164
2165             luma_weight_flag= get_bits1(&s->gb);
2166             if(luma_weight_flag){
2167                 h->luma_weight[i][list][0]= get_se_golomb(&s->gb);
2168                 h->luma_weight[i][list][1]= get_se_golomb(&s->gb);
2169                 if(   h->luma_weight[i][list][0] != luma_def
2170                    || h->luma_weight[i][list][1] != 0) {
2171                     h->use_weight= 1;
2172                     h->luma_weight_flag[list]= 1;
2173                 }
2174             }else{
2175                 h->luma_weight[i][list][0]= luma_def;
2176                 h->luma_weight[i][list][1]= 0;
2177             }
2178
2179             if(h->sps.chroma_format_idc){
2180                 chroma_weight_flag= get_bits1(&s->gb);
2181                 if(chroma_weight_flag){
2182                     int j;
2183                     for(j=0; j<2; j++){
2184                         h->chroma_weight[i][list][j][0]= get_se_golomb(&s->gb);
2185                         h->chroma_weight[i][list][j][1]= get_se_golomb(&s->gb);
2186                         if(   h->chroma_weight[i][list][j][0] != chroma_def
2187                            || h->chroma_weight[i][list][j][1] != 0) {
2188                             h->use_weight_chroma= 1;
2189                             h->chroma_weight_flag[list]= 1;
2190                         }
2191                     }
2192                 }else{
2193                     int j;
2194                     for(j=0; j<2; j++){
2195                         h->chroma_weight[i][list][j][0]= chroma_def;
2196                         h->chroma_weight[i][list][j][1]= 0;
2197                     }
2198                 }
2199             }
2200         }
2201         if(h->slice_type_nos != AV_PICTURE_TYPE_B) break;
2202     }
2203     h->use_weight= h->use_weight || h->use_weight_chroma;
2204     return 0;
2205 }
2206
2207 /**
2208  * Initialize implicit_weight table.
2209  * @param field  0/1 initialize the weight for interlaced MBAFF
2210  *                -1 initializes the rest
2211  */
2212 static void implicit_weight_table(H264Context *h, int field){
2213     MpegEncContext * const s = &h->s;
2214     int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
2215
2216     for (i = 0; i < 2; i++) {
2217         h->luma_weight_flag[i]   = 0;
2218         h->chroma_weight_flag[i] = 0;
2219     }
2220
2221     if(field < 0){
2222         if (s->picture_structure == PICT_FRAME) {
2223             cur_poc = s->current_picture_ptr->poc;
2224         } else {
2225             cur_poc = s->current_picture_ptr->field_poc[s->picture_structure - 1];
2226         }
2227     if(   h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF
2228        && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
2229         h->use_weight= 0;
2230         h->use_weight_chroma= 0;
2231         return;
2232     }
2233         ref_start= 0;
2234         ref_count0= h->ref_count[0];
2235         ref_count1= h->ref_count[1];
2236     }else{
2237         cur_poc = s->current_picture_ptr->field_poc[field];
2238         ref_start= 16;
2239         ref_count0= 16+2*h->ref_count[0];
2240         ref_count1= 16+2*h->ref_count[1];
2241     }
2242
2243     h->use_weight= 2;
2244     h->use_weight_chroma= 2;
2245     h->luma_log2_weight_denom= 5;
2246     h->chroma_log2_weight_denom= 5;
2247
2248     for(ref0=ref_start; ref0 < ref_count0; ref0++){
2249         int poc0 = h->ref_list[0][ref0].poc;
2250         for(ref1=ref_start; ref1 < ref_count1; ref1++){
2251             int w = 32;
2252             if (!h->ref_list[0][ref0].long_ref && !h->ref_list[1][ref1].long_ref) {
2253                 int poc1 = h->ref_list[1][ref1].poc;
2254                 int td = av_clip(poc1 - poc0, -128, 127);
2255                 if(td){
2256                     int tb = av_clip(cur_poc - poc0, -128, 127);
2257                     int tx = (16384 + (FFABS(td) >> 1)) / td;
2258                     int dist_scale_factor = (tb*tx + 32) >> 8;
2259                     if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
2260                         w = 64 - dist_scale_factor;
2261                 }
2262             }
2263             if(field<0){
2264                 h->implicit_weight[ref0][ref1][0]=
2265                 h->implicit_weight[ref0][ref1][1]= w;
2266             }else{
2267                 h->implicit_weight[ref0][ref1][field]=w;
2268             }
2269         }
2270     }
2271 }
2272
2273 /**
2274  * instantaneous decoder refresh.
2275  */
2276 static void idr(H264Context *h){
2277     ff_h264_remove_all_refs(h);
2278     h->prev_frame_num= 0;
2279     h->prev_frame_num_offset= 0;
2280     h->prev_poc_msb=
2281     h->prev_poc_lsb= 0;
2282 }
2283
2284 /* forget old pics after a seek */
2285 static void flush_dpb(AVCodecContext *avctx){
2286     H264Context *h= avctx->priv_data;
2287     int i;
2288     for(i=0; i<=MAX_DELAYED_PIC_COUNT; i++) {
2289         if(h->delayed_pic[i])
2290             h->delayed_pic[i]->f.reference = 0;
2291         h->delayed_pic[i]= NULL;
2292     }
2293     h->outputed_poc=h->next_outputed_poc= INT_MIN;
2294     h->prev_interlaced_frame = 1;
2295     idr(h);
2296     if(h->s.current_picture_ptr)
2297         h->s.current_picture_ptr->f.reference = 0;
2298     h->s.first_field= 0;
2299     ff_h264_reset_sei(h);
2300     ff_mpeg_flush(avctx);
2301     h->recovery_frame= -1;
2302     h->sync= 0;
2303 }
2304
2305 static int init_poc(H264Context *h){
2306     MpegEncContext * const s = &h->s;
2307     const int max_frame_num= 1<<h->sps.log2_max_frame_num;
2308     int field_poc[2];
2309     Picture *cur = s->current_picture_ptr;
2310
2311     h->frame_num_offset= h->prev_frame_num_offset;
2312     if(h->frame_num < h->prev_frame_num)
2313         h->frame_num_offset += max_frame_num;
2314
2315     if(h->sps.poc_type==0){
2316         const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
2317
2318         if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
2319             h->poc_msb = h->prev_poc_msb + max_poc_lsb;
2320         else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
2321             h->poc_msb = h->prev_poc_msb - max_poc_lsb;
2322         else
2323             h->poc_msb = h->prev_poc_msb;
2324 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
2325         field_poc[0] =
2326         field_poc[1] = h->poc_msb + h->poc_lsb;
2327         if(s->picture_structure == PICT_FRAME)
2328             field_poc[1] += h->delta_poc_bottom;
2329     }else if(h->sps.poc_type==1){
2330         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
2331         int i;
2332
2333         if(h->sps.poc_cycle_length != 0)
2334             abs_frame_num = h->frame_num_offset + h->frame_num;
2335         else
2336             abs_frame_num = 0;
2337
2338         if(h->nal_ref_idc==0 && abs_frame_num > 0)
2339             abs_frame_num--;
2340
2341         expected_delta_per_poc_cycle = 0;
2342         for(i=0; i < h->sps.poc_cycle_length; i++)
2343             expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
2344
2345         if(abs_frame_num > 0){
2346             int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
2347             int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
2348
2349             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
2350             for(i = 0; i <= frame_num_in_poc_cycle; i++)
2351                 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
2352         } else
2353             expectedpoc = 0;
2354
2355         if(h->nal_ref_idc == 0)
2356             expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
2357
2358         field_poc[0] = expectedpoc + h->delta_poc[0];
2359         field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
2360
2361         if(s->picture_structure == PICT_FRAME)
2362             field_poc[1] += h->delta_poc[1];
2363     }else{
2364         int poc= 2*(h->frame_num_offset + h->frame_num);
2365
2366         if(!h->nal_ref_idc)
2367             poc--;
2368
2369         field_poc[0]= poc;
2370         field_poc[1]= poc;
2371     }
2372
2373     if(s->picture_structure != PICT_BOTTOM_FIELD)
2374         s->current_picture_ptr->field_poc[0]= field_poc[0];
2375     if(s->picture_structure != PICT_TOP_FIELD)
2376         s->current_picture_ptr->field_poc[1]= field_poc[1];
2377     cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
2378
2379     return 0;
2380 }
2381
2382
2383 /**
2384  * initialize scan tables
2385  */
2386 static void init_scan_tables(H264Context *h){
2387     int i;
2388     for(i=0; i<16; i++){
2389 #define T(x) (x>>2) | ((x<<2) & 0xF)
2390         h->zigzag_scan[i] = T(zigzag_scan[i]);
2391         h-> field_scan[i] = T( field_scan[i]);
2392 #undef T
2393     }
2394     for(i=0; i<64; i++){
2395 #define T(x) (x>>3) | ((x&7)<<3)
2396         h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
2397         h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
2398         h->field_scan8x8[i]        = T(field_scan8x8[i]);
2399         h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
2400 #undef T
2401     }
2402     if(h->sps.transform_bypass){ //FIXME same ugly
2403         h->zigzag_scan_q0          = zigzag_scan;
2404         h->zigzag_scan8x8_q0       = ff_zigzag_direct;
2405         h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
2406         h->field_scan_q0           = field_scan;
2407         h->field_scan8x8_q0        = field_scan8x8;
2408         h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
2409     }else{
2410         h->zigzag_scan_q0          = h->zigzag_scan;
2411         h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
2412         h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
2413         h->field_scan_q0           = h->field_scan;
2414         h->field_scan8x8_q0        = h->field_scan8x8;
2415         h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
2416     }
2417 }
2418
2419 static int field_end(H264Context *h, int in_setup){
2420     MpegEncContext * const s = &h->s;
2421     AVCodecContext * const avctx= s->avctx;
2422     int err = 0;
2423     s->mb_y= 0;
2424
2425     if (!in_setup && !s->dropable)
2426         ff_thread_report_progress((AVFrame*)s->current_picture_ptr, (16*s->mb_height >> FIELD_PICTURE) - 1,
2427                                  s->picture_structure==PICT_BOTTOM_FIELD);
2428
2429     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2430         ff_vdpau_h264_set_reference_frames(s);
2431
2432     if(in_setup || !(avctx->active_thread_type&FF_THREAD_FRAME)){
2433         if(!s->dropable) {
2434             err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
2435             h->prev_poc_msb= h->poc_msb;
2436             h->prev_poc_lsb= h->poc_lsb;
2437         }
2438         h->prev_frame_num_offset= h->frame_num_offset;
2439         h->prev_frame_num= h->frame_num;
2440         h->outputed_poc = h->next_outputed_poc;
2441     }
2442
2443     if (avctx->hwaccel) {
2444         if (avctx->hwaccel->end_frame(avctx) < 0)
2445             av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
2446     }
2447
2448     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2449         ff_vdpau_h264_picture_complete(s);
2450
2451     /*
2452      * FIXME: Error handling code does not seem to support interlaced
2453      * when slices span multiple rows
2454      * The ff_er_add_slice calls don't work right for bottom
2455      * fields; they cause massive erroneous error concealing
2456      * Error marking covers both fields (top and bottom).
2457      * This causes a mismatched s->error_count
2458      * and a bad error table. Further, the error count goes to
2459      * INT_MAX when called for bottom field, because mb_y is
2460      * past end by one (callers fault) and resync_mb_y != 0
2461      * causes problems for the first MB line, too.
2462      */
2463     if (!FIELD_PICTURE)
2464         ff_er_frame_end(s);
2465
2466     MPV_frame_end(s);
2467
2468     h->current_slice=0;
2469
2470     return err;
2471 }
2472
2473 /**
2474  * Replicate H264 "master" context to thread contexts.
2475  */
2476 static void clone_slice(H264Context *dst, H264Context *src)
2477 {
2478     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
2479     dst->s.current_picture_ptr  = src->s.current_picture_ptr;
2480     dst->s.current_picture      = src->s.current_picture;
2481     dst->s.linesize             = src->s.linesize;
2482     dst->s.uvlinesize           = src->s.uvlinesize;
2483     dst->s.first_field          = src->s.first_field;
2484
2485     dst->prev_poc_msb           = src->prev_poc_msb;
2486     dst->prev_poc_lsb           = src->prev_poc_lsb;
2487     dst->prev_frame_num_offset  = src->prev_frame_num_offset;
2488     dst->prev_frame_num         = src->prev_frame_num;
2489     dst->short_ref_count        = src->short_ref_count;
2490
2491     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
2492     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
2493     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
2494     memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
2495
2496     memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
2497     memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
2498 }
2499
2500 /**
2501  * computes profile from profile_idc and constraint_set?_flags
2502  *
2503  * @param sps SPS
2504  *
2505  * @return profile as defined by FF_PROFILE_H264_*
2506  */
2507 int ff_h264_get_profile(SPS *sps)
2508 {
2509     int profile = sps->profile_idc;
2510
2511     switch(sps->profile_idc) {
2512     case FF_PROFILE_H264_BASELINE:
2513         // constraint_set1_flag set to 1
2514         profile |= (sps->constraint_set_flags & 1<<1) ? FF_PROFILE_H264_CONSTRAINED : 0;
2515         break;
2516     case FF_PROFILE_H264_HIGH_10:
2517     case FF_PROFILE_H264_HIGH_422:
2518     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
2519         // constraint_set3_flag set to 1
2520         profile |= (sps->constraint_set_flags & 1<<3) ? FF_PROFILE_H264_INTRA : 0;
2521         break;
2522     }
2523
2524     return profile;
2525 }
2526
2527 /**
2528  * decodes a slice header.
2529  * This will also call MPV_common_init() and frame_start() as needed.
2530  *
2531  * @param h h264context
2532  * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
2533  *
2534  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
2535  */
2536 static int decode_slice_header(H264Context *h, H264Context *h0){
2537     MpegEncContext * const s = &h->s;
2538     MpegEncContext * const s0 = &h0->s;
2539     unsigned int first_mb_in_slice;
2540     unsigned int pps_id;
2541     int num_ref_idx_active_override_flag;
2542     unsigned int slice_type, tmp, i, j;
2543     int default_ref_list_done = 0;
2544     int last_pic_structure;
2545
2546     s->dropable= h->nal_ref_idc == 0;
2547
2548     /* FIXME: 2tap qpel isn't implemented for high bit depth. */
2549     if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc && !h->pixel_shift){
2550         s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
2551         s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
2552     }else{
2553         s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
2554         s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
2555     }
2556
2557     first_mb_in_slice= get_ue_golomb(&s->gb);
2558
2559     if(first_mb_in_slice == 0){ //FIXME better field boundary detection
2560         if(h0->current_slice && FIELD_PICTURE){
2561             field_end(h, 1);
2562         }
2563
2564         h0->current_slice = 0;
2565         if (!s0->first_field)
2566             s->current_picture_ptr= NULL;
2567     }
2568
2569     slice_type= get_ue_golomb_31(&s->gb);
2570     if(slice_type > 9){
2571         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);
2572         return -1;
2573     }
2574     if(slice_type > 4){
2575         slice_type -= 5;
2576         h->slice_type_fixed=1;
2577     }else
2578         h->slice_type_fixed=0;
2579
2580     slice_type= golomb_to_pict_type[ slice_type ];
2581     if (slice_type == AV_PICTURE_TYPE_I
2582         || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
2583         default_ref_list_done = 1;
2584     }
2585     h->slice_type= slice_type;
2586     h->slice_type_nos= slice_type & 3;
2587
2588     s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
2589
2590     pps_id= get_ue_golomb(&s->gb);
2591     if(pps_id>=MAX_PPS_COUNT){
2592         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
2593         return -1;
2594     }
2595     if(!h0->pps_buffers[pps_id]) {
2596         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
2597         return -1;
2598     }
2599     h->pps= *h0->pps_buffers[pps_id];
2600
2601     if(!h0->sps_buffers[h->pps.sps_id]) {
2602         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
2603         return -1;
2604     }
2605     h->sps = *h0->sps_buffers[h->pps.sps_id];
2606
2607     s->avctx->profile = ff_h264_get_profile(&h->sps);
2608     s->avctx->level   = h->sps.level_idc;
2609     s->avctx->refs    = h->sps.ref_frame_count;
2610
2611     if(h == h0 && h->dequant_coeff_pps != pps_id){
2612         h->dequant_coeff_pps = pps_id;
2613         init_dequant_tables(h);
2614     }
2615
2616     s->mb_width= h->sps.mb_width;
2617     s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
2618
2619     h->b_stride=  s->mb_width*4;
2620
2621     s->chroma_y_shift = h->sps.chroma_format_idc <= 1; // 400 uses yuv420p
2622
2623     s->width = 16*s->mb_width - (2>>CHROMA444)*FFMIN(h->sps.crop_right, (8<<CHROMA444)-1);
2624     if(h->sps.frame_mbs_only_flag)
2625         s->height= 16*s->mb_height - (1<<s->chroma_y_shift)*FFMIN(h->sps.crop_bottom, (16>>s->chroma_y_shift)-1);
2626     else
2627         s->height= 16*s->mb_height - (2<<s->chroma_y_shift)*FFMIN(h->sps.crop_bottom, (16>>s->chroma_y_shift)-1);
2628
2629     if (s->context_initialized
2630         && (   s->width != s->avctx->width || s->height != s->avctx->height
2631             || s->avctx->bits_per_raw_sample != h->sps.bit_depth_luma
2632             || h->cur_chroma_format_idc != h->sps.chroma_format_idc
2633             || av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
2634         if(h != h0) {
2635             av_log_missing_feature(s->avctx, "Width/height/bit depth/chroma idc changing with threads is", 0);
2636             return -1;   // width / height changed during parallelized decoding
2637         }
2638         free_tables(h, 0);
2639         flush_dpb(s->avctx);
2640         MPV_common_end(s);
2641         h->list_count = 0;
2642     }
2643     if (!s->context_initialized) {
2644         if (h != h0) {
2645             av_log(h->s.avctx, AV_LOG_ERROR, "Cannot (re-)initialize context during parallel decoding.\n");
2646             return -1;
2647         }
2648
2649         avcodec_set_dimensions(s->avctx, s->width, s->height);
2650         s->avctx->sample_aspect_ratio= h->sps.sar;
2651         av_assert0(s->avctx->sample_aspect_ratio.den);
2652
2653         if (s->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
2654             h->cur_chroma_format_idc != h->sps.chroma_format_idc) {
2655             if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 10 &&
2656                 (h->sps.bit_depth_luma != 9 || !CHROMA422)) {
2657                 s->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
2658                 h->cur_chroma_format_idc = h->sps.chroma_format_idc;
2659                 h->pixel_shift = h->sps.bit_depth_luma > 8;
2660
2661                 ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma, h->sps.chroma_format_idc);
2662                 ff_h264_pred_init(&h->hpc, s->codec_id, h->sps.bit_depth_luma, h->sps.chroma_format_idc);
2663                 s->dsp.dct_bits = h->sps.bit_depth_luma > 8 ? 32 : 16;
2664                 dsputil_init(&s->dsp, s->avctx);
2665             } else {
2666                 av_log(s->avctx, AV_LOG_DEBUG, "Unsupported bit depth: %d chroma_idc: %d\n",
2667                        h->sps.bit_depth_luma, h->sps.chroma_format_idc);
2668                 return -1;
2669             }
2670         }
2671
2672         if(h->sps.video_signal_type_present_flag){
2673             s->avctx->color_range = h->sps.full_range>0 ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
2674             if(h->sps.colour_description_present_flag){
2675                 s->avctx->color_primaries = h->sps.color_primaries;
2676                 s->avctx->color_trc       = h->sps.color_trc;
2677                 s->avctx->colorspace      = h->sps.colorspace;
2678             }
2679         }
2680
2681         if(h->sps.timing_info_present_flag){
2682             int64_t den= h->sps.time_scale;
2683             if(h->x264_build < 44U)
2684                 den *= 2;
2685             av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
2686                       h->sps.num_units_in_tick, den, 1<<30);
2687         }
2688
2689         switch (h->sps.bit_depth_luma) {
2690             case 9 :
2691                 if (CHROMA444)
2692                     s->avctx->pix_fmt = PIX_FMT_YUV444P9;
2693                 else
2694                     s->avctx->pix_fmt = PIX_FMT_YUV420P9;
2695                 break;
2696             case 10 :
2697                 if (CHROMA444)
2698                     s->avctx->pix_fmt = PIX_FMT_YUV444P10;
2699                 else if (CHROMA422)
2700                     s->avctx->pix_fmt = PIX_FMT_YUV422P10;
2701                 else
2702                     s->avctx->pix_fmt = PIX_FMT_YUV420P10;
2703                 break;
2704             default:
2705                 if (CHROMA444){
2706                     s->avctx->pix_fmt = s->avctx->color_range == AVCOL_RANGE_JPEG ? PIX_FMT_YUVJ444P : PIX_FMT_YUV444P;
2707                 }else if (CHROMA422) {
2708                     s->avctx->pix_fmt = s->avctx->color_range == AVCOL_RANGE_JPEG ? PIX_FMT_YUVJ422P : PIX_FMT_YUV422P;
2709                 }else{
2710                     s->avctx->pix_fmt = s->avctx->get_format(s->avctx,
2711                                                              s->avctx->codec->pix_fmts ?
2712                                                              s->avctx->codec->pix_fmts :
2713                                                              s->avctx->color_range == AVCOL_RANGE_JPEG ?
2714                                                              hwaccel_pixfmt_list_h264_jpeg_420 :
2715                                                              ff_hwaccel_pixfmt_list_420);
2716                 }
2717         }
2718
2719         s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
2720
2721         if (MPV_common_init(s) < 0) {
2722             av_log(h->s.avctx, AV_LOG_ERROR, "MPV_common_init() failed.\n");
2723             return -1;
2724         }
2725         s->first_field = 0;
2726         h->prev_interlaced_frame = 1;
2727
2728         init_scan_tables(h);
2729         if (ff_h264_alloc_tables(h) < 0) {
2730             av_log(h->s.avctx, AV_LOG_ERROR, "Could not allocate memory for h264\n");
2731             return AVERROR(ENOMEM);
2732         }
2733
2734         if (!HAVE_THREADS || !(s->avctx->active_thread_type&FF_THREAD_SLICE)) {
2735             if (context_init(h) < 0) {
2736                 av_log(h->s.avctx, AV_LOG_ERROR, "context_init() failed.\n");
2737                 return -1;
2738             }
2739         } else {
2740             for(i = 1; i < s->avctx->thread_count; i++) {
2741                 H264Context *c;
2742                 c = h->thread_context[i] = av_malloc(sizeof(H264Context));
2743                 memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
2744                 memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
2745                 c->h264dsp = h->h264dsp;
2746                 c->sps = h->sps;
2747                 c->pps = h->pps;
2748                 c->pixel_shift = h->pixel_shift;
2749                 init_scan_tables(c);
2750                 clone_tables(c, h, i);
2751             }
2752
2753             for(i = 0; i < s->avctx->thread_count; i++)
2754                 if (context_init(h->thread_context[i]) < 0) {
2755                     av_log(h->s.avctx, AV_LOG_ERROR, "context_init() failed.\n");
2756                     return -1;
2757                 }
2758         }
2759     }
2760
2761     h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
2762
2763     h->mb_mbaff = 0;
2764     h->mb_aff_frame = 0;
2765     last_pic_structure = s0->picture_structure;
2766     if(h->sps.frame_mbs_only_flag){
2767         s->picture_structure= PICT_FRAME;
2768     }else{
2769         if(get_bits1(&s->gb)) { //field_pic_flag
2770             s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
2771         } else {
2772             s->picture_structure= PICT_FRAME;
2773             h->mb_aff_frame = h->sps.mb_aff;
2774         }
2775     }
2776     h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
2777
2778     if(h0->current_slice == 0){
2779         // Shorten frame num gaps so we don't have to allocate reference frames just to throw them away
2780         if(h->frame_num != h->prev_frame_num) {
2781             int unwrap_prev_frame_num = h->prev_frame_num, max_frame_num = 1<<h->sps.log2_max_frame_num;
2782
2783             if (unwrap_prev_frame_num > h->frame_num) unwrap_prev_frame_num -= max_frame_num;
2784
2785             if ((h->frame_num - unwrap_prev_frame_num) > h->sps.ref_frame_count) {
2786                 unwrap_prev_frame_num = (h->frame_num - h->sps.ref_frame_count) - 1;
2787                 if (unwrap_prev_frame_num < 0)
2788                     unwrap_prev_frame_num += max_frame_num;
2789
2790                 h->prev_frame_num = unwrap_prev_frame_num;
2791             }
2792         }
2793
2794         while(h->frame_num !=  h->prev_frame_num &&
2795               h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
2796             Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
2797             av_log(h->s.avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
2798             if (ff_h264_frame_start(h) < 0)
2799                 return -1;
2800             h->prev_frame_num++;
2801             h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
2802             s->current_picture_ptr->frame_num= h->prev_frame_num;
2803             ff_thread_report_progress((AVFrame*)s->current_picture_ptr, INT_MAX, 0);
2804             ff_thread_report_progress((AVFrame*)s->current_picture_ptr, INT_MAX, 1);
2805             ff_generate_sliding_window_mmcos(h);
2806             if (ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index) < 0 &&
2807                 s->avctx->error_recognition >= FF_ER_EXPLODE)
2808                 return AVERROR_INVALIDDATA;
2809             /* Error concealment: if a ref is missing, copy the previous ref in its place.
2810              * FIXME: avoiding a memcpy would be nice, but ref handling makes many assumptions
2811              * about there being no actual duplicates.
2812              * FIXME: this doesn't copy padding for out-of-frame motion vectors.  Given we're
2813              * concealing a lost frame, this probably isn't noticable by comparison, but it should
2814              * be fixed. */
2815             if (h->short_ref_count) {
2816                 if (prev) {
2817                     av_image_copy(h->short_ref[0]->f.data, h->short_ref[0]->f.linesize,
2818                                   (const uint8_t**)prev->f.data, prev->f.linesize,
2819                                   s->avctx->pix_fmt, s->mb_width*16, s->mb_height*16);
2820                     h->short_ref[0]->poc = prev->poc+2;
2821                 }
2822                 h->short_ref[0]->frame_num = h->prev_frame_num;
2823             }
2824         }
2825
2826         /* See if we have a decoded first field looking for a pair... */
2827         if (s0->first_field) {
2828             assert(s0->current_picture_ptr);
2829             assert(s0->current_picture_ptr->f.data[0]);
2830             assert(s0->current_picture_ptr->f.reference != DELAYED_PIC_REF);
2831
2832             /* figure out if we have a complementary field pair */
2833             if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
2834                 /*
2835                  * Previous field is unmatched. Don't display it, but let it
2836                  * remain for reference if marked as such.
2837                  */
2838                 s0->current_picture_ptr = NULL;
2839                 s0->first_field = FIELD_PICTURE;
2840
2841             } else {
2842                 if (h->nal_ref_idc &&
2843                         s0->current_picture_ptr->f.reference &&
2844                         s0->current_picture_ptr->frame_num != h->frame_num) {
2845                     /*
2846                      * This and previous field were reference, but had
2847                      * different frame_nums. Consider this field first in
2848                      * pair. Throw away previous field except for reference
2849                      * purposes.
2850                      */
2851                     s0->first_field = 1;
2852                     s0->current_picture_ptr = NULL;
2853
2854                 } else {
2855                     /* Second field in complementary pair */
2856                     s0->first_field = 0;
2857                 }
2858             }
2859
2860         } else {
2861             /* Frame or first field in a potentially complementary pair */
2862             assert(!s0->current_picture_ptr);
2863             s0->first_field = FIELD_PICTURE;
2864         }
2865
2866         if(!FIELD_PICTURE || s0->first_field) {
2867             if (ff_h264_frame_start(h) < 0) {
2868                 s0->first_field = 0;
2869                 return -1;
2870             }
2871         } else {
2872             ff_release_unused_pictures(s, 0);
2873         }
2874     }
2875     if(h != h0)
2876         clone_slice(h, h0);
2877
2878     s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
2879
2880     assert(s->mb_num == s->mb_width * s->mb_height);
2881     if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
2882        first_mb_in_slice                    >= s->mb_num){
2883         av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
2884         return -1;
2885     }
2886     s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
2887     s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
2888     if (s->picture_structure == PICT_BOTTOM_FIELD)
2889         s->resync_mb_y = s->mb_y = s->mb_y + 1;
2890     assert(s->mb_y < s->mb_height);
2891
2892     if(s->picture_structure==PICT_FRAME){
2893         h->curr_pic_num=   h->frame_num;
2894         h->max_pic_num= 1<< h->sps.log2_max_frame_num;
2895     }else{
2896         h->curr_pic_num= 2*h->frame_num + 1;
2897         h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
2898     }
2899
2900     if(h->nal_unit_type == NAL_IDR_SLICE){
2901         get_ue_golomb(&s->gb); /* idr_pic_id */
2902     }
2903
2904     if(h->sps.poc_type==0){
2905         h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
2906
2907         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
2908             h->delta_poc_bottom= get_se_golomb(&s->gb);
2909         }
2910     }
2911
2912     if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
2913         h->delta_poc[0]= get_se_golomb(&s->gb);
2914
2915         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
2916             h->delta_poc[1]= get_se_golomb(&s->gb);
2917     }
2918
2919     init_poc(h);
2920
2921     if(h->pps.redundant_pic_cnt_present){
2922         h->redundant_pic_count= get_ue_golomb(&s->gb);
2923     }
2924
2925     //set defaults, might be overridden a few lines later
2926     h->ref_count[0]= h->pps.ref_count[0];
2927     h->ref_count[1]= h->pps.ref_count[1];
2928
2929     if(h->slice_type_nos != AV_PICTURE_TYPE_I){
2930         unsigned max= (16<<(s->picture_structure != PICT_FRAME))-1;
2931         if(h->slice_type_nos == AV_PICTURE_TYPE_B){
2932             h->direct_spatial_mv_pred= get_bits1(&s->gb);
2933         }
2934         num_ref_idx_active_override_flag= get_bits1(&s->gb);
2935
2936         if(num_ref_idx_active_override_flag){
2937             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
2938             if(h->slice_type_nos==AV_PICTURE_TYPE_B)
2939                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
2940
2941         }
2942         if(h->ref_count[0]-1 > max || h->ref_count[1]-1 > max){
2943             av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
2944             h->ref_count[0]= h->ref_count[1]= 1;
2945             return -1;
2946         }
2947         if(h->slice_type_nos == AV_PICTURE_TYPE_B)
2948             h->list_count= 2;
2949         else
2950             h->list_count= 1;
2951     }else
2952         h->ref_count[1]= h->ref_count[0]= h->list_count= 0;
2953
2954     if(!default_ref_list_done){
2955         ff_h264_fill_default_ref_list(h);
2956     }
2957
2958     if(h->slice_type_nos!=AV_PICTURE_TYPE_I && ff_h264_decode_ref_pic_list_reordering(h) < 0) {
2959         h->ref_count[1]= h->ref_count[0]= 0;
2960         return -1;
2961     }
2962
2963     if(h->slice_type_nos!=AV_PICTURE_TYPE_I){
2964         s->last_picture_ptr= &h->ref_list[0][0];
2965         ff_copy_picture(&s->last_picture, s->last_picture_ptr);
2966     }
2967     if(h->slice_type_nos==AV_PICTURE_TYPE_B){
2968         s->next_picture_ptr= &h->ref_list[1][0];
2969         ff_copy_picture(&s->next_picture, s->next_picture_ptr);
2970     }
2971
2972     if(   (h->pps.weighted_pred          && h->slice_type_nos == AV_PICTURE_TYPE_P )
2973        ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== AV_PICTURE_TYPE_B ) )
2974         pred_weight_table(h);
2975     else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== AV_PICTURE_TYPE_B){
2976         implicit_weight_table(h, -1);
2977     }else {
2978         h->use_weight = 0;
2979         for (i = 0; i < 2; i++) {
2980             h->luma_weight_flag[i]   = 0;
2981             h->chroma_weight_flag[i] = 0;
2982         }
2983     }
2984
2985     if(h->nal_ref_idc && ff_h264_decode_ref_pic_marking(h0, &s->gb) < 0 &&
2986        s->avctx->error_recognition >= FF_ER_EXPLODE)
2987         return AVERROR_INVALIDDATA;
2988
2989     if(FRAME_MBAFF){
2990         ff_h264_fill_mbaff_ref_list(h);
2991
2992         if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== AV_PICTURE_TYPE_B){
2993             implicit_weight_table(h, 0);
2994             implicit_weight_table(h, 1);
2995         }
2996     }
2997
2998     if(h->slice_type_nos==AV_PICTURE_TYPE_B && !h->direct_spatial_mv_pred)
2999         ff_h264_direct_dist_scale_factor(h);
3000     ff_h264_direct_ref_list_init(h);
3001
3002     if( h->slice_type_nos != AV_PICTURE_TYPE_I && h->pps.cabac ){
3003         tmp = get_ue_golomb_31(&s->gb);
3004         if(tmp > 2){
3005             av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
3006             return -1;
3007         }
3008         h->cabac_init_idc= tmp;
3009     }
3010
3011     h->last_qscale_diff = 0;
3012     tmp = h->pps.init_qp + get_se_golomb(&s->gb);
3013     if(tmp>51+6*(h->sps.bit_depth_luma-8)){
3014         av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
3015         return -1;
3016     }
3017     s->qscale= tmp;
3018     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3019     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3020     //FIXME qscale / qp ... stuff
3021     if(h->slice_type == AV_PICTURE_TYPE_SP){
3022         get_bits1(&s->gb); /* sp_for_switch_flag */
3023     }
3024     if(h->slice_type==AV_PICTURE_TYPE_SP || h->slice_type == AV_PICTURE_TYPE_SI){
3025         get_se_golomb(&s->gb); /* slice_qs_delta */
3026     }
3027
3028     h->deblocking_filter = 1;
3029     h->slice_alpha_c0_offset = 52;
3030     h->slice_beta_offset = 52;
3031     if( h->pps.deblocking_filter_parameters_present ) {
3032         tmp= get_ue_golomb_31(&s->gb);
3033         if(tmp > 2){
3034             av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
3035             return -1;
3036         }
3037         h->deblocking_filter= tmp;
3038         if(h->deblocking_filter < 2)
3039             h->deblocking_filter^= 1; // 1<->0
3040
3041         if( h->deblocking_filter ) {
3042             h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
3043             h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
3044             if(   h->slice_alpha_c0_offset > 104U
3045                || h->slice_beta_offset     > 104U){
3046                 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);
3047                 return -1;
3048             }
3049         }
3050     }
3051
3052     if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
3053        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != AV_PICTURE_TYPE_I)
3054        ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == AV_PICTURE_TYPE_B)
3055        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
3056         h->deblocking_filter= 0;
3057
3058     if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
3059         if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
3060             /* Cheat slightly for speed:
3061                Do not bother to deblock across slices. */
3062             h->deblocking_filter = 2;
3063         } else {
3064             h0->max_contexts = 1;
3065             if(!h0->single_decode_warning) {
3066                 av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
3067                 h0->single_decode_warning = 1;
3068             }
3069             if (h != h0) {
3070                 av_log(h->s.avctx, AV_LOG_ERROR, "Deblocking switched inside frame.\n");
3071                 return 1;
3072             }
3073         }
3074     }
3075     h->qp_thresh = 15 + 52 - FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset)
3076                  - FFMAX3(0, h->pps.chroma_qp_index_offset[0], h->pps.chroma_qp_index_offset[1])
3077                  + 6 * (h->sps.bit_depth_luma - 8);
3078
3079 #if 0 //FMO
3080     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
3081         slice_group_change_cycle= get_bits(&s->gb, ?);
3082 #endif
3083
3084     h0->last_slice_type = slice_type;
3085     h->slice_num = ++h0->current_slice;
3086
3087     if(h->slice_num)
3088         h0->slice_row[(h->slice_num-1)&(MAX_SLICES-1)]= s->resync_mb_y;
3089     if (   h0->slice_row[h->slice_num&(MAX_SLICES-1)] + 3 >= s->resync_mb_y
3090         && h0->slice_row[h->slice_num&(MAX_SLICES-1)] <= s->resync_mb_y
3091         && h->slice_num >= MAX_SLICES) {
3092         //in case of ASO this check needs to be updated depending on how we decide to assign slice numbers in this case
3093         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);
3094     }
3095
3096     for(j=0; j<2; j++){
3097         int id_list[16];
3098         int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
3099         for(i=0; i<16; i++){
3100             id_list[i]= 60;
3101             if (h->ref_list[j][i].f.data[0]) {
3102                 int k;
3103                 uint8_t *base = h->ref_list[j][i].f.base[0];
3104                 for(k=0; k<h->short_ref_count; k++)
3105                     if (h->short_ref[k]->f.base[0] == base) {
3106                         id_list[i]= k;
3107                         break;
3108                     }
3109                 for(k=0; k<h->long_ref_count; k++)
3110                     if (h->long_ref[k] && h->long_ref[k]->f.base[0] == base) {
3111                         id_list[i]= h->short_ref_count + k;
3112                         break;
3113                     }
3114             }
3115         }
3116
3117         ref2frm[0]=
3118         ref2frm[1]= -1;
3119         for(i=0; i<16; i++)
3120             ref2frm[i+2]= 4*id_list[i]
3121                           + (h->ref_list[j][i].f.reference & 3);
3122         ref2frm[18+0]=
3123         ref2frm[18+1]= -1;
3124         for(i=16; i<48; i++)
3125             ref2frm[i+4]= 4*id_list[(i-16)>>1]
3126                           + (h->ref_list[j][i].f.reference & 3);
3127     }
3128
3129     //FIXME: fix draw_edges+PAFF+frame threads
3130     h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE || (!h->sps.frame_mbs_only_flag && s->avctx->active_thread_type)) ? 0 : 16;
3131     h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
3132
3133     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
3134         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",
3135                h->slice_num,
3136                (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
3137                first_mb_in_slice,
3138                av_get_picture_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
3139                pps_id, h->frame_num,
3140                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
3141                h->ref_count[0], h->ref_count[1],
3142                s->qscale,
3143                h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
3144                h->use_weight,
3145                h->use_weight==1 && h->use_weight_chroma ? "c" : "",
3146                h->slice_type == AV_PICTURE_TYPE_B ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
3147                );
3148     }
3149
3150     return 0;
3151 }
3152
3153 int ff_h264_get_slice_type(const H264Context *h)
3154 {
3155     switch (h->slice_type) {
3156     case AV_PICTURE_TYPE_P:  return 0;
3157     case AV_PICTURE_TYPE_B:  return 1;
3158     case AV_PICTURE_TYPE_I:  return 2;
3159     case AV_PICTURE_TYPE_SP: return 3;
3160     case AV_PICTURE_TYPE_SI: return 4;
3161     default:         return -1;
3162     }
3163 }
3164
3165 static av_always_inline void fill_filter_caches_inter(H264Context *h, MpegEncContext * const s, int mb_type, int top_xy,
3166                                                       int left_xy[LEFT_MBS], int top_type, int left_type[LEFT_MBS], int mb_xy, int list)
3167 {
3168     int b_stride = h->b_stride;
3169     int16_t (*mv_dst)[2] = &h->mv_cache[list][scan8[0]];
3170     int8_t *ref_cache = &h->ref_cache[list][scan8[0]];
3171     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
3172         if(USES_LIST(top_type, list)){
3173             const int b_xy= h->mb2b_xy[top_xy] + 3*b_stride;
3174             const int b8_xy= 4*top_xy + 2;
3175             int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
3176             AV_COPY128(mv_dst - 1*8, s->current_picture.f.motion_val[list][b_xy + 0]);
3177             ref_cache[0 - 1*8]=
3178             ref_cache[1 - 1*8]= ref2frm[list][s->current_picture.f.ref_index[list][b8_xy + 0]];
3179             ref_cache[2 - 1*8]=
3180             ref_cache[3 - 1*8]= ref2frm[list][s->current_picture.f.ref_index[list][b8_xy + 1]];
3181         }else{
3182             AV_ZERO128(mv_dst - 1*8);
3183             AV_WN32A(&ref_cache[0 - 1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3184         }
3185
3186         if(!IS_INTERLACED(mb_type^left_type[LTOP])){
3187             if(USES_LIST(left_type[LTOP], list)){
3188                 const int b_xy= h->mb2b_xy[left_xy[LTOP]] + 3;
3189                 const int b8_xy= 4*left_xy[LTOP] + 1;
3190                 int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[LTOP]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
3191                 AV_COPY32(mv_dst - 1 +  0, s->current_picture.f.motion_val[list][b_xy + b_stride*0]);
3192                 AV_COPY32(mv_dst - 1 +  8, s->current_picture.f.motion_val[list][b_xy + b_stride*1]);
3193                 AV_COPY32(mv_dst - 1 + 16, s->current_picture.f.motion_val[list][b_xy + b_stride*2]);
3194                 AV_COPY32(mv_dst - 1 + 24, s->current_picture.f.motion_val[list][b_xy + b_stride*3]);
3195                 ref_cache[-1 +  0]=
3196                 ref_cache[-1 +  8]= ref2frm[list][s->current_picture.f.ref_index[list][b8_xy + 2*0]];
3197                 ref_cache[-1 + 16]=
3198                 ref_cache[-1 + 24]= ref2frm[list][s->current_picture.f.ref_index[list][b8_xy + 2*1]];
3199             }else{
3200                 AV_ZERO32(mv_dst - 1 + 0);
3201                 AV_ZERO32(mv_dst - 1 + 8);
3202                 AV_ZERO32(mv_dst - 1 +16);
3203                 AV_ZERO32(mv_dst - 1 +24);
3204                 ref_cache[-1 +  0]=
3205                 ref_cache[-1 +  8]=
3206                 ref_cache[-1 + 16]=
3207                 ref_cache[-1 + 24]= LIST_NOT_USED;
3208             }
3209         }
3210     }
3211
3212     if(!USES_LIST(mb_type, list)){
3213         fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0,0), 4);
3214         AV_WN32A(&ref_cache[0*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3215         AV_WN32A(&ref_cache[1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3216         AV_WN32A(&ref_cache[2*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3217         AV_WN32A(&ref_cache[3*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3218         return;
3219     }
3220
3221     {
3222         int8_t *ref = &s->current_picture.f.ref_index[list][4*mb_xy];
3223         int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
3224         uint32_t ref01 = (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101;
3225         uint32_t ref23 = (pack16to32(ref2frm[list][ref[2]],ref2frm[list][ref[3]])&0x00FF00FF)*0x0101;
3226         AV_WN32A(&ref_cache[0*8], ref01);
3227         AV_WN32A(&ref_cache[1*8], ref01);
3228         AV_WN32A(&ref_cache[2*8], ref23);
3229         AV_WN32A(&ref_cache[3*8], ref23);
3230     }
3231
3232     {
3233         int16_t (*mv_src)[2] = &s->current_picture.f.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
3234         AV_COPY128(mv_dst + 8*0, mv_src + 0*b_stride);
3235         AV_COPY128(mv_dst + 8*1, mv_src + 1*b_stride);
3236         AV_COPY128(mv_dst + 8*2, mv_src + 2*b_stride);
3237         AV_COPY128(mv_dst + 8*3, mv_src + 3*b_stride);
3238     }
3239 }
3240
3241 /**
3242  *
3243  * @return non zero if the loop filter can be skiped
3244  */
3245 static int fill_filter_caches(H264Context *h, int mb_type){
3246     MpegEncContext * const s = &h->s;
3247     const int mb_xy= h->mb_xy;
3248     int top_xy, left_xy[LEFT_MBS];
3249     int top_type, left_type[LEFT_MBS];
3250     uint8_t *nnz;
3251     uint8_t *nnz_cache;
3252
3253     top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
3254
3255     /* Wow, what a mess, why didn't they simplify the interlacing & intra
3256      * stuff, I can't imagine that these complex rules are worth it. */
3257
3258     left_xy[LBOT] = left_xy[LTOP] = mb_xy-1;
3259     if(FRAME_MBAFF){
3260         const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.f.mb_type[mb_xy - 1]);
3261         const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
3262         if(s->mb_y&1){
3263             if (left_mb_field_flag != curr_mb_field_flag) {
3264                 left_xy[LTOP] -= s->mb_stride;
3265             }
3266         }else{
3267             if(curr_mb_field_flag){
3268                 top_xy += s->mb_stride & (((s->current_picture.f.mb_type[top_xy] >> 7) & 1) - 1);
3269             }
3270             if (left_mb_field_flag != curr_mb_field_flag) {
3271                 left_xy[LBOT] += s->mb_stride;
3272             }
3273         }
3274     }
3275
3276     h->top_mb_xy = top_xy;
3277     h->left_mb_xy[LTOP] = left_xy[LTOP];
3278     h->left_mb_xy[LBOT] = left_xy[LBOT];
3279     {
3280         //for sufficiently low qp, filtering wouldn't do anything
3281         //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
3282         int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
3283         int qp = s->current_picture.f.qscale_table[mb_xy];
3284         if(qp <= qp_thresh
3285            && (left_xy[LTOP] < 0 || ((qp + s->current_picture.f.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh)
3286            && (top_xy        < 0 || ((qp + s->current_picture.f.qscale_table[top_xy       ] + 1) >> 1) <= qp_thresh)) {
3287             if(!FRAME_MBAFF)
3288                 return 1;
3289             if ((left_xy[LTOP] < 0            || ((qp + s->current_picture.f.qscale_table[left_xy[LBOT]        ] + 1) >> 1) <= qp_thresh) &&
3290                 (top_xy        < s->mb_stride || ((qp + s->current_picture.f.qscale_table[top_xy - s->mb_stride] + 1) >> 1) <= qp_thresh))
3291                 return 1;
3292         }
3293     }
3294
3295     top_type        = s->current_picture.f.mb_type[top_xy];
3296     left_type[LTOP] = s->current_picture.f.mb_type[left_xy[LTOP]];
3297     left_type[LBOT] = s->current_picture.f.mb_type[left_xy[LBOT]];
3298     if(h->deblocking_filter == 2){
3299         if(h->slice_table[top_xy       ] != h->slice_num) top_type= 0;
3300         if(h->slice_table[left_xy[LBOT]] != h->slice_num) left_type[LTOP]= left_type[LBOT]= 0;
3301     }else{
3302         if(h->slice_table[top_xy       ] == 0xFFFF) top_type= 0;
3303         if(h->slice_table[left_xy[LBOT]] == 0xFFFF) left_type[LTOP]= left_type[LBOT] =0;
3304     }
3305     h->top_type       = top_type;
3306     h->left_type[LTOP]= left_type[LTOP];
3307     h->left_type[LBOT]= left_type[LBOT];
3308
3309     if(IS_INTRA(mb_type))
3310         return 0;
3311
3312     fill_filter_caches_inter(h, s, mb_type, top_xy, left_xy, top_type, left_type, mb_xy, 0);
3313     if(h->list_count == 2)
3314         fill_filter_caches_inter(h, s, mb_type, top_xy, left_xy, top_type, left_type, mb_xy, 1);
3315
3316     nnz = h->non_zero_count[mb_xy];
3317     nnz_cache = h->non_zero_count_cache;
3318     AV_COPY32(&nnz_cache[4+8*1], &nnz[ 0]);
3319     AV_COPY32(&nnz_cache[4+8*2], &nnz[ 4]);
3320     AV_COPY32(&nnz_cache[4+8*3], &nnz[ 8]);
3321     AV_COPY32(&nnz_cache[4+8*4], &nnz[12]);
3322     h->cbp= h->cbp_table[mb_xy];
3323
3324     if(top_type){
3325         nnz = h->non_zero_count[top_xy];
3326         AV_COPY32(&nnz_cache[4+8*0], &nnz[3*4]);
3327     }
3328
3329     if(left_type[LTOP]){
3330         nnz = h->non_zero_count[left_xy[LTOP]];
3331         nnz_cache[3+8*1]= nnz[3+0*4];
3332         nnz_cache[3+8*2]= nnz[3+1*4];
3333         nnz_cache[3+8*3]= nnz[3+2*4];
3334         nnz_cache[3+8*4]= nnz[3+3*4];
3335     }
3336
3337     // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
3338     if(!CABAC && h->pps.transform_8x8_mode){
3339         if(IS_8x8DCT(top_type)){
3340             nnz_cache[4+8*0]=
3341             nnz_cache[5+8*0]= (h->cbp_table[top_xy] & 0x4000) >> 12;
3342             nnz_cache[6+8*0]=
3343             nnz_cache[7+8*0]= (h->cbp_table[top_xy] & 0x8000) >> 12;
3344         }
3345         if(IS_8x8DCT(left_type[LTOP])){
3346             nnz_cache[3+8*1]=
3347             nnz_cache[3+8*2]= (h->cbp_table[left_xy[LTOP]]&0x2000) >> 12; //FIXME check MBAFF
3348         }
3349         if(IS_8x8DCT(left_type[LBOT])){
3350             nnz_cache[3+8*3]=
3351             nnz_cache[3+8*4]= (h->cbp_table[left_xy[LBOT]]&0x8000) >> 12; //FIXME check MBAFF
3352         }
3353
3354         if(IS_8x8DCT(mb_type)){
3355             nnz_cache[scan8[0   ]]= nnz_cache[scan8[1   ]]=
3356             nnz_cache[scan8[2   ]]= nnz_cache[scan8[3   ]]= (h->cbp & 0x1000) >> 12;
3357
3358             nnz_cache[scan8[0+ 4]]= nnz_cache[scan8[1+ 4]]=
3359             nnz_cache[scan8[2+ 4]]= nnz_cache[scan8[3+ 4]]= (h->cbp & 0x2000) >> 12;
3360
3361             nnz_cache[scan8[0+ 8]]= nnz_cache[scan8[1+ 8]]=
3362             nnz_cache[scan8[2+ 8]]= nnz_cache[scan8[3+ 8]]= (h->cbp & 0x4000) >> 12;
3363
3364             nnz_cache[scan8[0+12]]= nnz_cache[scan8[1+12]]=
3365             nnz_cache[scan8[2+12]]= nnz_cache[scan8[3+12]]= (h->cbp & 0x8000) >> 12;
3366         }
3367     }
3368
3369     return 0;
3370 }
3371
3372 static void loop_filter(H264Context *h, int start_x, int end_x){
3373     MpegEncContext * const s = &h->s;
3374     uint8_t  *dest_y, *dest_cb, *dest_cr;
3375     int linesize, uvlinesize, mb_x, mb_y;
3376     const int end_mb_y= s->mb_y + FRAME_MBAFF;
3377     const int old_slice_type= h->slice_type;
3378     const int pixel_shift = h->pixel_shift;
3379     const int block_h = 16>>s->chroma_y_shift;
3380
3381     if(h->deblocking_filter) {
3382         for(mb_x= start_x; mb_x<end_x; mb_x++){
3383             for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
3384                 int mb_xy, mb_type;
3385                 mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
3386                 h->slice_num= h->slice_table[mb_xy];
3387                 mb_type = s->current_picture.f.mb_type[mb_xy];
3388                 h->list_count= h->list_counts[mb_xy];
3389
3390                 if(FRAME_MBAFF)
3391                     h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
3392
3393                 s->mb_x= mb_x;
3394                 s->mb_y= mb_y;
3395                 dest_y  = s->current_picture.f.data[0] + ((mb_x << pixel_shift) + mb_y * s->linesize  ) * 16;
3396                 dest_cb = s->current_picture.f.data[1] + (mb_x << pixel_shift)*(8<<CHROMA444) + mb_y * s->uvlinesize * block_h;
3397                 dest_cr = s->current_picture.f.data[2] + (mb_x << pixel_shift)*(8<<CHROMA444) + mb_y * s->uvlinesize * block_h;
3398                     //FIXME simplify above
3399
3400                 if (MB_FIELD) {
3401                     linesize   = h->mb_linesize   = s->linesize * 2;
3402                     uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
3403                     if(mb_y&1){ //FIXME move out of this function?
3404                         dest_y -= s->linesize*15;
3405                         dest_cb-= s->uvlinesize*(block_h-1);
3406                         dest_cr-= s->uvlinesize*(block_h-1);
3407                     }
3408                 } else {
3409                     linesize   = h->mb_linesize   = s->linesize;
3410                     uvlinesize = h->mb_uvlinesize = s->uvlinesize;
3411                 }
3412                 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
3413                 if(fill_filter_caches(h, mb_type))
3414                     continue;
3415                 h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.f.qscale_table[mb_xy]);
3416                 h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.f.qscale_table[mb_xy]);
3417
3418                 if (FRAME_MBAFF) {
3419                     ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
3420                 } else {
3421                     ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
3422                 }
3423             }
3424         }
3425     }
3426     h->slice_type= old_slice_type;
3427     s->mb_x= end_x;
3428     s->mb_y= end_mb_y - FRAME_MBAFF;
3429     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3430     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3431 }
3432
3433 static void predict_field_decoding_flag(H264Context *h){
3434     MpegEncContext * const s = &h->s;
3435     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
3436     int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
3437                 ? s->current_picture.f.mb_type[mb_xy - 1]
3438                 : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
3439                 ? s->current_picture.f.mb_type[mb_xy - s->mb_stride]
3440                 : 0;
3441     h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
3442 }
3443
3444 /**
3445  * Draw edges and report progress for the last MB row.
3446  */
3447 static void decode_finish_row(H264Context *h){
3448     MpegEncContext * const s = &h->s;
3449     int top = 16*(s->mb_y >> FIELD_PICTURE);
3450     int height = 16 << FRAME_MBAFF;
3451     int deblock_border = (16 + 4) << FRAME_MBAFF;
3452     int pic_height = 16*s->mb_height >> FIELD_PICTURE;
3453
3454     if (h->deblocking_filter) {
3455         if((top + height) >= pic_height)
3456             height += deblock_border;
3457
3458         top -= deblock_border;
3459     }
3460
3461     if (top >= pic_height || (top + height) < h->emu_edge_height)
3462         return;
3463
3464     height = FFMIN(height, pic_height - top);
3465     if (top < h->emu_edge_height) {
3466         height = top+height;
3467         top = 0;
3468     }
3469
3470     ff_draw_horiz_band(s, top, height);
3471
3472     if (s->dropable) return;
3473
3474     ff_thread_report_progress((AVFrame*)s->current_picture_ptr, top + height - 1,
3475                              s->picture_structure==PICT_BOTTOM_FIELD);
3476 }
3477
3478 static int decode_slice(struct AVCodecContext *avctx, void *arg){
3479     H264Context *h = *(void**)arg;
3480     MpegEncContext * const s = &h->s;
3481     const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
3482     int lf_x_start = s->mb_x;
3483
3484     s->mb_skip_run= -1;
3485
3486     h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
3487                     (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
3488
3489     if( h->pps.cabac ) {
3490         /* realign */
3491         align_get_bits( &s->gb );
3492
3493         /* init cabac */
3494         ff_init_cabac_states( &h->cabac);
3495         ff_init_cabac_decoder( &h->cabac,
3496                                s->gb.buffer + get_bits_count(&s->gb)/8,
3497                                (get_bits_left(&s->gb) + 7)/8);
3498
3499         ff_h264_init_cabac_states(h);
3500
3501         for(;;){
3502 //START_TIMER
3503             int ret = ff_h264_decode_mb_cabac(h);
3504             int eos;
3505 //STOP_TIMER("decode_mb_cabac")
3506
3507             if(ret>=0) ff_h264_hl_decode_mb(h);
3508
3509             if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
3510                 s->mb_y++;
3511
3512                 ret = ff_h264_decode_mb_cabac(h);
3513
3514                 if(ret>=0) ff_h264_hl_decode_mb(h);
3515                 s->mb_y--;
3516             }
3517             eos = get_cabac_terminate( &h->cabac );
3518
3519             if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
3520                 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);
3521                 if (s->mb_x >= lf_x_start) loop_filter(h, lf_x_start, s->mb_x + 1);
3522                 return 0;
3523             }
3524             if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
3525                 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);
3526                 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);
3527                 return -1;
3528             }
3529
3530             if( ++s->mb_x >= s->mb_width ) {
3531                 loop_filter(h, lf_x_start, s->mb_x);
3532                 s->mb_x = lf_x_start = 0;
3533                 decode_finish_row(h);
3534                 ++s->mb_y;
3535                 if(FIELD_OR_MBAFF_PICTURE) {
3536                     ++s->mb_y;
3537                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
3538                         predict_field_decoding_flag(h);
3539                 }
3540             }
3541
3542             if( eos || s->mb_y >= s->mb_height ) {
3543                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
3544                 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);
3545                 if (s->mb_x > lf_x_start) loop_filter(h, lf_x_start, s->mb_x);
3546                 return 0;
3547             }
3548         }
3549
3550     } else {
3551         for(;;){
3552             int ret = ff_h264_decode_mb_cavlc(h);
3553
3554             if(ret>=0) ff_h264_hl_decode_mb(h);
3555
3556             if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
3557                 s->mb_y++;
3558                 ret = ff_h264_decode_mb_cavlc(h);
3559
3560                 if(ret>=0) ff_h264_hl_decode_mb(h);
3561                 s->mb_y--;
3562             }
3563
3564             if(ret<0){
3565                 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
3566                 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);
3567                 return -1;
3568             }
3569
3570             if(++s->mb_x >= s->mb_width){
3571                 loop_filter(h, lf_x_start, s->mb_x);
3572                 s->mb_x = lf_x_start = 0;
3573                 decode_finish_row(h);
3574                 ++s->mb_y;
3575                 if(FIELD_OR_MBAFF_PICTURE) {
3576                     ++s->mb_y;
3577                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
3578                         predict_field_decoding_flag(h);
3579                 }
3580                 if(s->mb_y >= s->mb_height){
3581                     tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
3582
3583                     if(   get_bits_count(&s->gb) == s->gb.size_in_bits
3584                        || get_bits_count(&s->gb) <  s->gb.size_in_bits && s->avctx->error_recognition < FF_ER_AGGRESSIVE) {
3585                         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);
3586
3587                         return 0;
3588                     }else{
3589                         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);
3590
3591                         return -1;
3592                     }
3593                 }
3594             }
3595
3596             if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
3597                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
3598                 if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
3599                     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);
3600                     if (s->mb_x > lf_x_start) loop_filter(h, lf_x_start, s->mb_x);
3601
3602                     return 0;
3603                 }else{
3604                     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);
3605
3606                     return -1;
3607                 }
3608             }
3609         }
3610     }
3611 }
3612
3613 /**
3614  * Call decode_slice() for each context.
3615  *
3616  * @param h h264 master context
3617  * @param context_count number of contexts to execute
3618  */
3619 static int execute_decode_slices(H264Context *h, int context_count){
3620     MpegEncContext * const s = &h->s;
3621     AVCodecContext * const avctx= s->avctx;
3622     H264Context *hx;
3623     int i;
3624
3625     if (s->avctx->hwaccel || s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
3626         return 0;
3627     if(context_count == 1) {
3628         return decode_slice(avctx, &h);
3629     } else {
3630         for(i = 1; i < context_count; i++) {
3631             hx = h->thread_context[i];
3632             hx->s.error_recognition = avctx->error_recognition;
3633             hx->s.error_count = 0;
3634             hx->x264_build= h->x264_build;
3635         }
3636
3637         avctx->execute(avctx, (void *)decode_slice,
3638                        h->thread_context, NULL, context_count, sizeof(void*));
3639
3640         /* pull back stuff from slices to master context */
3641         hx = h->thread_context[context_count - 1];
3642         s->mb_x = hx->s.mb_x;
3643         s->mb_y = hx->s.mb_y;
3644         s->dropable = hx->s.dropable;
3645         s->picture_structure = hx->s.picture_structure;
3646         for(i = 1; i < context_count; i++)
3647             h->s.error_count += h->thread_context[i]->s.error_count;
3648     }
3649
3650     return 0;
3651 }
3652
3653
3654 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
3655     MpegEncContext * const s = &h->s;
3656     AVCodecContext * const avctx= s->avctx;
3657     H264Context *hx; ///< thread context
3658     int buf_index;
3659     int context_count;
3660     int next_avc;
3661     int pass = !(avctx->active_thread_type & FF_THREAD_FRAME);
3662     int nals_needed=0; ///< number of NALs that need decoding before the next frame thread starts
3663     int nal_index;
3664
3665     h->max_contexts = (HAVE_THREADS && (s->avctx->active_thread_type&FF_THREAD_SLICE)) ? avctx->thread_count : 1;
3666     if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
3667         h->current_slice = 0;
3668         if (!s->first_field)
3669             s->current_picture_ptr= NULL;
3670         ff_h264_reset_sei(h);
3671     }
3672
3673     for(;pass <= 1;pass++){
3674         buf_index = 0;
3675         context_count = 0;
3676         next_avc = h->is_avc ? 0 : buf_size;
3677         nal_index = 0;
3678     for(;;){
3679         int consumed;
3680         int dst_length;
3681         int bit_length;
3682         const uint8_t *ptr;
3683         int i, nalsize = 0;
3684         int err;
3685
3686         if(buf_index >= next_avc) {
3687             if(buf_index >= buf_size) break;
3688             nalsize = 0;
3689             for(i = 0; i < h->nal_length_size; i++)
3690                 nalsize = (nalsize << 8) | buf[buf_index++];
3691             if(nalsize <= 0 || nalsize > buf_size - buf_index){
3692                 av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
3693                 break;
3694             }
3695             next_avc= buf_index + nalsize;
3696         } else {
3697             // start code prefix search
3698             for(; buf_index + 3 < next_avc; buf_index++){
3699                 // This should always succeed in the first iteration.
3700                 if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
3701                     break;
3702             }
3703
3704             if(buf_index+3 >= buf_size) break;
3705
3706             buf_index+=3;
3707             if(buf_index >= next_avc) continue;
3708         }
3709
3710         hx = h->thread_context[context_count];
3711
3712         ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
3713         if (ptr==NULL || dst_length < 0){
3714             return -1;
3715         }
3716         i= buf_index + consumed;
3717         if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
3718            buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
3719             s->workaround_bugs |= FF_BUG_TRUNCATED;
3720
3721         if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
3722         while(dst_length > 0 && ptr[dst_length - 1] == 0)
3723             dst_length--;
3724         }
3725         bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
3726
3727         if(s->avctx->debug&FF_DEBUG_STARTCODE){
3728             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);
3729         }
3730
3731         if (h->is_avc && (nalsize != consumed) && nalsize){
3732             av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
3733         }
3734
3735         buf_index += consumed;
3736         nal_index++;
3737
3738         if(pass == 0) {
3739             // packets can sometimes contain multiple PPS/SPS
3740             // e.g. two PAFF field pictures in one packet, or a demuxer which splits NALs strangely
3741             // if so, when frame threading we can't start the next thread until we've read all of them
3742             switch (hx->nal_unit_type) {
3743                 case NAL_SPS:
3744                 case NAL_PPS:
3745                     nals_needed = nal_index;
3746                     break;
3747                 case NAL_IDR_SLICE:
3748                 case NAL_SLICE:
3749                     init_get_bits(&hx->s.gb, ptr, bit_length);
3750                     if(!get_ue_golomb(&hx->s.gb))
3751                         nals_needed = nal_index;
3752             }
3753             continue;
3754         }
3755
3756         //FIXME do not discard SEI id
3757         if(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0)
3758             continue;
3759
3760       again:
3761         err = 0;
3762         switch(hx->nal_unit_type){
3763         case NAL_IDR_SLICE:
3764             if (h->nal_unit_type != NAL_IDR_SLICE) {
3765                 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
3766                 return -1;
3767             }
3768             idr(h); //FIXME ensure we don't loose some frames if there is reordering
3769         case NAL_SLICE:
3770             init_get_bits(&hx->s.gb, ptr, bit_length);
3771             hx->intra_gb_ptr=
3772             hx->inter_gb_ptr= &hx->s.gb;
3773             hx->s.data_partitioning = 0;
3774
3775             if((err = decode_slice_header(hx, h)))
3776                break;
3777
3778             if (h->sei_recovery_frame_cnt >= 0 && h->recovery_frame < 0) {
3779                 h->recovery_frame = (h->frame_num + h->sei_recovery_frame_cnt) %
3780                                     (1 << h->sps.log2_max_frame_num);
3781             }
3782
3783             s->current_picture_ptr->f.key_frame |=
3784                     (hx->nal_unit_type == NAL_IDR_SLICE);
3785
3786             if (h->recovery_frame == h->frame_num) {
3787                 h->sync |= 1;
3788                 h->recovery_frame = -1;
3789             }
3790
3791             h->sync |= !!s->current_picture_ptr->f.key_frame;
3792             h->sync |= 3*!!(s->flags2 & CODEC_FLAG2_SHOW_ALL);
3793             s->current_picture_ptr->sync = h->sync;
3794
3795             if (h->current_slice == 1) {
3796                 if(!(s->flags2 & CODEC_FLAG2_CHUNKS)) {
3797                     decode_postinit(h, nal_index >= nals_needed);
3798                 }
3799
3800                 if (s->avctx->hwaccel && s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
3801                     return -1;
3802                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
3803                     ff_vdpau_h264_picture_start(s);
3804             }
3805
3806             if(hx->redundant_pic_count==0
3807                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
3808                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=AV_PICTURE_TYPE_B)
3809                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==AV_PICTURE_TYPE_I)
3810                && avctx->skip_frame < AVDISCARD_ALL){
3811                 if(avctx->hwaccel) {
3812                     if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
3813                         return -1;
3814                 }else
3815                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
3816                     static const uint8_t start_code[] = {0x00, 0x00, 0x01};
3817                     ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
3818                     ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
3819                 }else
3820                     context_count++;
3821             }
3822             break;
3823         case NAL_DPA:
3824             init_get_bits(&hx->s.gb, ptr, bit_length);
3825             hx->intra_gb_ptr=
3826             hx->inter_gb_ptr= NULL;
3827
3828             if ((err = decode_slice_header(hx, h)) < 0)
3829                 break;
3830
3831             hx->s.data_partitioning = 1;
3832
3833             break;
3834         case NAL_DPB:
3835             init_get_bits(&hx->intra_gb, ptr, bit_length);
3836             hx->intra_gb_ptr= &hx->intra_gb;
3837             break;
3838         case NAL_DPC:
3839             init_get_bits(&hx->inter_gb, ptr, bit_length);
3840             hx->inter_gb_ptr= &hx->inter_gb;
3841
3842             if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
3843                && s->context_initialized
3844                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
3845                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=AV_PICTURE_TYPE_B)
3846                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==AV_PICTURE_TYPE_I)
3847                && avctx->skip_frame < AVDISCARD_ALL)
3848                 context_count++;
3849             break;
3850         case NAL_SEI:
3851             init_get_bits(&s->gb, ptr, bit_length);
3852             ff_h264_decode_sei(h);
3853             break;
3854         case NAL_SPS:
3855             init_get_bits(&s->gb, ptr, bit_length);
3856             if(ff_h264_decode_seq_parameter_set(h) < 0 && h->is_avc && (nalsize != consumed) && nalsize){
3857                 av_log(h->s.avctx, AV_LOG_DEBUG, "SPS decoding failure, trying alternative mode\n");
3858                 init_get_bits(&s->gb, &buf[buf_index + 1 - consumed], 8*nalsize);
3859                 ff_h264_decode_seq_parameter_set(h);
3860             }
3861
3862             if (s->flags& CODEC_FLAG_LOW_DELAY ||
3863                 (h->sps.bitstream_restriction_flag && !h->sps.num_reorder_frames))
3864                 s->low_delay=1;
3865
3866             if(avctx->has_b_frames < 2)
3867                 avctx->has_b_frames= !s->low_delay;
3868             break;
3869         case NAL_PPS:
3870             init_get_bits(&s->gb, ptr, bit_length);
3871
3872             ff_h264_decode_picture_parameter_set(h, bit_length);
3873
3874             break;
3875         case NAL_AUD:
3876         case NAL_END_SEQUENCE:
3877         case NAL_END_STREAM:
3878         case NAL_FILLER_DATA:
3879         case NAL_SPS_EXT:
3880         case NAL_AUXILIARY_SLICE:
3881             break;
3882         default:
3883             av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
3884         }
3885
3886         if(context_count == h->max_contexts) {
3887             execute_decode_slices(h, context_count);
3888             context_count = 0;
3889         }
3890
3891         if (err < 0)
3892             av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
3893         else if(err == 1) {
3894             /* Slice could not be decoded in parallel mode, copy down
3895              * NAL unit stuff to context 0 and restart. Note that
3896              * rbsp_buffer is not transferred, but since we no longer
3897              * run in parallel mode this should not be an issue. */
3898             h->nal_unit_type = hx->nal_unit_type;
3899             h->nal_ref_idc   = hx->nal_ref_idc;
3900             hx = h;
3901             goto again;
3902         }
3903     }
3904     }
3905     if(context_count)
3906         execute_decode_slices(h, context_count);
3907     return buf_index;
3908 }
3909
3910 /**
3911  * returns the number of bytes consumed for building the current frame
3912  */
3913 static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
3914         if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
3915         if(pos+10>buf_size) pos=buf_size; // oops ;)
3916
3917         return pos;
3918 }
3919
3920 static int decode_frame(AVCodecContext *avctx,
3921                              void *data, int *data_size,
3922                              AVPacket *avpkt)
3923 {
3924     const uint8_t *buf = avpkt->data;
3925     int buf_size = avpkt->size;
3926     H264Context *h = avctx->priv_data;
3927     MpegEncContext *s = &h->s;
3928     AVFrame *pict = data;
3929     int buf_index;
3930
3931     s->flags= avctx->flags;
3932     s->flags2= avctx->flags2;
3933
3934    /* end of stream, output what is still in the buffers */
3935  out:
3936     if (buf_size == 0) {
3937         Picture *out;
3938         int i, out_idx;
3939
3940         s->current_picture_ptr = NULL;
3941
3942 //FIXME factorize this with the output code below
3943         out = h->delayed_pic[0];
3944         out_idx = 0;
3945         for (i = 1; h->delayed_pic[i] && !h->delayed_pic[i]->f.key_frame && !h->delayed_pic[i]->mmco_reset; i++)
3946             if(h->delayed_pic[i]->poc < out->poc){
3947                 out = h->delayed_pic[i];
3948                 out_idx = i;
3949             }
3950
3951         for(i=out_idx; h->delayed_pic[i]; i++)
3952             h->delayed_pic[i] = h->delayed_pic[i+1];
3953
3954         if(out){
3955             *data_size = sizeof(AVFrame);
3956             *pict= *(AVFrame*)out;
3957         }
3958
3959         return 0;
3960     }
3961     if(h->is_avc && buf_size >= 9 && AV_RB32(buf)==0x0164001F && buf[5] && buf[8]==0x67)
3962         return ff_h264_decode_extradata(h, buf, buf_size);
3963
3964     buf_index=decode_nal_units(h, buf, buf_size);
3965     if(buf_index < 0)
3966         return -1;
3967
3968     if (!s->current_picture_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
3969         buf_size = 0;
3970         goto out;
3971     }
3972
3973     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
3974         if (avctx->skip_frame >= AVDISCARD_NONREF)
3975             return 0;
3976         av_log(avctx, AV_LOG_ERROR, "no frame!\n");
3977         return -1;
3978     }
3979
3980     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
3981
3982         if(s->flags2 & CODEC_FLAG2_CHUNKS) decode_postinit(h, 1);
3983
3984         field_end(h, 0);
3985
3986         *data_size = 0; /* Wait for second field. */
3987         if (h->next_output_pic && h->next_output_pic->sync) {
3988             if(h->sync>1 || h->next_output_pic->f.pict_type != AV_PICTURE_TYPE_B){
3989                 *data_size = sizeof(AVFrame);
3990                 *pict = *(AVFrame*)h->next_output_pic;
3991             }
3992         }
3993     }
3994
3995     assert(pict->data[0] || !*data_size);
3996     ff_print_debug_info(s, pict);
3997 //printf("out %d\n", (int)pict->data[0]);
3998
3999     return get_consumed_bytes(s, buf_index, buf_size);
4000 }
4001 #if 0
4002 static inline void fill_mb_avail(H264Context *h){
4003     MpegEncContext * const s = &h->s;
4004     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
4005
4006     if(s->mb_y){
4007         h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
4008         h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
4009         h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
4010     }else{
4011         h->mb_avail[0]=
4012         h->mb_avail[1]=
4013         h->mb_avail[2]= 0;
4014     }
4015     h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
4016     h->mb_avail[4]= 1; //FIXME move out
4017     h->mb_avail[5]= 0; //FIXME move out
4018 }
4019 #endif
4020
4021 #ifdef TEST
4022 #undef printf
4023 #undef random
4024 #define COUNT 8000
4025 #define SIZE (COUNT*40)
4026 extern AVCodec ff_h264_decoder;
4027 int main(void){
4028     int i;
4029     uint8_t temp[SIZE];
4030     PutBitContext pb;
4031     GetBitContext gb;
4032 //    int int_temp[10000];
4033     DSPContext dsp;
4034     AVCodecContext avctx;
4035
4036     avcodec_get_context_defaults3(&avctx, &ff_h264_decoder);
4037
4038     dsputil_init(&dsp, &avctx);
4039
4040     init_put_bits(&pb, temp, SIZE);
4041     printf("testing unsigned exp golomb\n");
4042     for(i=0; i<COUNT; i++){
4043         START_TIMER
4044         set_ue_golomb(&pb, i);
4045         STOP_TIMER("set_ue_golomb");
4046     }
4047     flush_put_bits(&pb);
4048
4049     init_get_bits(&gb, temp, 8*SIZE);
4050     for(i=0; i<COUNT; i++){
4051         int j, s;
4052
4053         s= show_bits(&gb, 24);
4054
4055         START_TIMER
4056         j= get_ue_golomb(&gb);
4057         if(j != i){
4058             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
4059 //            return -1;
4060         }
4061         STOP_TIMER("get_ue_golomb");
4062     }
4063
4064
4065     init_put_bits(&pb, temp, SIZE);
4066     printf("testing signed exp golomb\n");
4067     for(i=0; i<COUNT; i++){
4068         START_TIMER
4069         set_se_golomb(&pb, i - COUNT/2);
4070         STOP_TIMER("set_se_golomb");
4071     }
4072     flush_put_bits(&pb);
4073
4074     init_get_bits(&gb, temp, 8*SIZE);
4075     for(i=0; i<COUNT; i++){
4076         int j, s;
4077
4078         s= show_bits(&gb, 24);
4079
4080         START_TIMER
4081         j= get_se_golomb(&gb);
4082         if(j != i - COUNT/2){
4083             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
4084 //            return -1;
4085         }
4086         STOP_TIMER("get_se_golomb");
4087     }
4088
4089     printf("Testing RBSP\n");
4090
4091
4092     return 0;
4093 }
4094 #endif /* TEST */
4095
4096
4097 av_cold void ff_h264_free_context(H264Context *h)
4098 {
4099     int i;
4100
4101     free_tables(h, 1); //FIXME cleanup init stuff perhaps
4102
4103     for(i = 0; i < MAX_SPS_COUNT; i++)
4104         av_freep(h->sps_buffers + i);
4105
4106     for(i = 0; i < MAX_PPS_COUNT; i++)
4107         av_freep(h->pps_buffers + i);
4108 }
4109
4110 av_cold int ff_h264_decode_end(AVCodecContext *avctx)
4111 {
4112     H264Context *h = avctx->priv_data;
4113     MpegEncContext *s = &h->s;
4114
4115     ff_h264_free_context(h);
4116
4117     MPV_common_end(s);
4118
4119 //    memset(h, 0, sizeof(H264Context));
4120
4121     return 0;
4122 }
4123
4124 static const AVProfile profiles[] = {
4125     { FF_PROFILE_H264_BASELINE,             "Baseline"              },
4126     { FF_PROFILE_H264_CONSTRAINED_BASELINE, "Constrained Baseline"  },
4127     { FF_PROFILE_H264_MAIN,                 "Main"                  },
4128     { FF_PROFILE_H264_EXTENDED,             "Extended"              },
4129     { FF_PROFILE_H264_HIGH,                 "High"                  },
4130     { FF_PROFILE_H264_HIGH_10,              "High 10"               },
4131     { FF_PROFILE_H264_HIGH_10_INTRA,        "High 10 Intra"         },
4132     { FF_PROFILE_H264_HIGH_422,             "High 4:2:2"            },
4133     { FF_PROFILE_H264_HIGH_422_INTRA,       "High 4:2:2 Intra"      },
4134     { FF_PROFILE_H264_HIGH_444,             "High 4:4:4"            },
4135     { FF_PROFILE_H264_HIGH_444_PREDICTIVE,  "High 4:4:4 Predictive" },
4136     { FF_PROFILE_H264_HIGH_444_INTRA,       "High 4:4:4 Intra"      },
4137     { FF_PROFILE_H264_CAVLC_444,            "CAVLC 4:4:4"           },
4138     { FF_PROFILE_UNKNOWN },
4139 };
4140
4141 AVCodec ff_h264_decoder = {
4142     .name           = "h264",
4143     .type           = AVMEDIA_TYPE_VIDEO,
4144     .id             = CODEC_ID_H264,
4145     .priv_data_size = sizeof(H264Context),
4146     .init           = ff_h264_decode_init,
4147     .close          = ff_h264_decode_end,
4148     .decode         = decode_frame,
4149     .capabilities   = /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY |
4150                       CODEC_CAP_SLICE_THREADS | CODEC_CAP_FRAME_THREADS,
4151     .flush= flush_dpb,
4152     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
4153     .init_thread_copy      = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
4154     .update_thread_context = ONLY_IF_THREADS_ENABLED(decode_update_thread_context),
4155     .profiles = NULL_IF_CONFIG_SMALL(profiles),
4156 };
4157
4158 #if CONFIG_H264_VDPAU_DECODER
4159 AVCodec ff_h264_vdpau_decoder = {
4160     .name           = "h264_vdpau",
4161     .type           = AVMEDIA_TYPE_VIDEO,
4162     .id             = CODEC_ID_H264,
4163     .priv_data_size = sizeof(H264Context),
4164     .init           = ff_h264_decode_init,
4165     .close          = ff_h264_decode_end,
4166     .decode         = decode_frame,
4167     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
4168     .flush= flush_dpb,
4169     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
4170     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
4171     .profiles = NULL_IF_CONFIG_SMALL(profiles),
4172 };
4173 #endif