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   1 /*
   2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
   3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file
  24  * H.264 / AVC / MPEG4 part10 codec.
  25  * @author Michael Niedermayer <michaelni@gmx.at>
  26  */
  27
  28 #include "libavutil/imgutils.h"
  29 #include "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 void ff_h264_write_back_intra_pred_mode(H264Context *h){
  64     int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
  65
  66     AV_COPY32(mode, h->intra4x4_pred_mode_cache + 4 + 8*4);
  67     mode[4]= h->intra4x4_pred_mode_cache[7+8*3];
  68     mode[5]= h->intra4x4_pred_mode_cache[7+8*2];
  69     mode[6]= h->intra4x4_pred_mode_cache[7+8*1];
  70 }
  71
  72 /**
  73  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
  74  */
  75 int ff_h264_check_intra4x4_pred_mode(H264Context *h){
  76     MpegEncContext * const s = &h->s;
  77     static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
  78     static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
  79     int i;
  80
  81     if(!(h->top_samples_available&0x8000)){
  82         for(i=0; i<4; i++){
  83             int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
  84             if(status<0){
  85                 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);
  86                 return -1;
  87             } else if(status){
  88                 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
  89             }
  90         }
  91     }
  92
  93     if((h->left_samples_available&0x8888)!=0x8888){
  94         static const int mask[4]={0x8000,0x2000,0x80,0x20};
  95         for(i=0; i<4; i++){
  96             if(!(h->left_samples_available&mask[i])){
  97                 int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
  98                 if(status<0){
  99                     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);
 100                     return -1;
 101                 } else if(status){
 102                     h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
 103                 }
 104             }
 105         }
 106     }
 107
 108     return 0;
 109 } //FIXME cleanup like ff_h264_check_intra_pred_mode
 110
 111 /**
 112  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 113  */
 114 int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
 115     MpegEncContext * const s = &h->s;
 116     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
 117     static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
 118
 119     if(mode > 6U) {
 120         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);
 121         return -1;
 122     }
 123
 124     if(!(h->top_samples_available&0x8000)){
 125         mode= top[ mode ];
 126         if(mode<0){
 127             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);
 128             return -1;
 129         }
 130     }
 131
 132     if((h->left_samples_available&0x8080) != 0x8080){
 133         mode= left[ mode ];
 134         if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
 135             mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
 136         }
 137         if(mode<0){
 138             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);
 139             return -1;
 140         }
 141     }
 142
 143     return mode;
 144 }
 145
 146 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
 147     int i, si, di;
 148     uint8_t *dst;
 149     int bufidx;
 150
 151 //    src[0]&0x80;                //forbidden bit
 152     h->nal_ref_idc= src[0]>>5;
 153     h->nal_unit_type= src[0]&0x1F;
 154
 155     src++; length--;
 156
 157 #if HAVE_FAST_UNALIGNED
 158 # if HAVE_FAST_64BIT
 159 #   define RS 7
 160     for(i=0; i+1<length; i+=9){
 161         if(!((~AV_RN64A(src+i) & (AV_RN64A(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
 162 # else
 163 #   define RS 3
 164     for(i=0; i+1<length; i+=5){
 165         if(!((~AV_RN32A(src+i) & (AV_RN32A(src+i) - 0x01000101U)) & 0x80008080U))
 166 # endif
 167             continue;
 168         if(i>0 && !src[i]) i--;
 169         while(src[i]) i++;
 170 #else
 171 #   define RS 0
 172     for(i=0; i+1<length; i+=2){
 173         if(src[i]) continue;
 174         if(i>0 && src[i-1]==0) i--;
 175 #endif
 176         if(i+2<length && src[i+1]==0 && src[i+2]<=3){
 177             if(src[i+2]!=3){
 178                 /* startcode, so we must be past the end */
 179                 length=i;
 180             }
 181             break;
 182         }
 183         i-= RS;
 184     }
 185
 186     if(i>=length-1){ //no escaped 0
 187         *dst_length= length;
 188         *consumed= length+1; //+1 for the header
 189         return src;
 190     }
 191
 192     bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
 193     av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
 194     dst= h->rbsp_buffer[bufidx];
 195
 196     if (dst == NULL){
 197         return NULL;
 198     }
 199
 200 //printf("decoding esc\n");
 201     memcpy(dst, src, i);
 202     si=di=i;
 203     while(si+2<length){
 204         //remove escapes (very rare 1:2^22)
 205         if(src[si+2]>3){
 206             dst[di++]= src[si++];
 207             dst[di++]= src[si++];
 208         }else if(src[si]==0 && src[si+1]==0){
 209             if(src[si+2]==3){ //escape
 210                 dst[di++]= 0;
 211                 dst[di++]= 0;
 212                 si+=3;
 213                 continue;
 214             }else //next start code
 215                 goto nsc;
 216         }
 217
 218         dst[di++]= src[si++];
 219     }
 220     while(si<length)
 221         dst[di++]= src[si++];
 222 nsc:
 223
 224     memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
 225
 226     *dst_length= di;
 227     *consumed= si + 1;//+1 for the header
 228 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
 229     return dst;
 230 }
 231
 232 /**
 233  * Identify the exact end of the bitstream
 234  * @return the length of the trailing, or 0 if damaged
 235  */
 236 static int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
 237     int v= *src;
 238     int r;
 239
 240     tprintf(h->s.avctx, "rbsp trailing %X\n", v);
 241
 242     for(r=1; r<9; r++){
 243         if(v&1) return r;
 244         v>>=1;
 245     }
 246     return 0;
 247 }
 248
 249 static inline int get_lowest_part_list_y(H264Context *h, Picture *pic, int n, int height,
 250                                  int y_offset, int list){
 251     int raw_my= h->mv_cache[list][ scan8[n] ][1];
 252     int filter_height= (raw_my&3) ? 2 : 0;
 253     int full_my= (raw_my>>2) + y_offset;
 254     int top = full_my - filter_height, bottom = full_my + height + filter_height;
 255
 256     return FFMAX(abs(top), bottom);
 257 }
 258
 259 static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n, int height,
 260                                int y_offset, int list0, int list1, int *nrefs){
 261     MpegEncContext * const s = &h->s;
 262     int my;
 263
 264     y_offset += 16*(s->mb_y >> MB_FIELD);
 265
 266     if(list0){
 267         int ref_n = h->ref_cache[0][ scan8[n] ];
 268         Picture *ref= &h->ref_list[0][ref_n];
 269
 270         // Error resilience puts the current picture in the ref list.
 271         // Don't try to wait on these as it will cause a deadlock.
 272         // Fields can wait on each other, though.
 273         if(ref->thread_opaque != s->current_picture.thread_opaque ||
 274            (ref->reference&3) != s->picture_structure) {
 275             my = get_lowest_part_list_y(h, ref, n, height, y_offset, 0);
 276             if (refs[0][ref_n] < 0) nrefs[0] += 1;
 277             refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
 278         }
 279     }
 280
 281     if(list1){
 282         int ref_n = h->ref_cache[1][ scan8[n] ];
 283         Picture *ref= &h->ref_list[1][ref_n];
 284
 285         if(ref->thread_opaque != s->current_picture.thread_opaque ||
 286            (ref->reference&3) != s->picture_structure) {
 287             my = get_lowest_part_list_y(h, ref, n, height, y_offset, 1);
 288             if (refs[1][ref_n] < 0) nrefs[1] += 1;
 289             refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
 290         }
 291     }
 292 }
 293
 294 /**
 295  * Wait until all reference frames are available for MC operations.
 296  *
 297  * @param h the H264 context
 298  */
 299 static void await_references(H264Context *h){
 300     MpegEncContext * const s = &h->s;
 301     const int mb_xy= h->mb_xy;
 302     const int mb_type= s->current_picture.mb_type[mb_xy];
 303     int refs[2][48];
 304     int nrefs[2] = {0};
 305     int ref, list;
 306
 307     memset(refs, -1, sizeof(refs));
 308
 309     if(IS_16X16(mb_type)){
 310         get_lowest_part_y(h, refs, 0, 16, 0,
 311                   IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
 312     }else if(IS_16X8(mb_type)){
 313         get_lowest_part_y(h, refs, 0, 8, 0,
 314                   IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
 315         get_lowest_part_y(h, refs, 8, 8, 8,
 316                   IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
 317     }else if(IS_8X16(mb_type)){
 318         get_lowest_part_y(h, refs, 0, 16, 0,
 319                   IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
 320         get_lowest_part_y(h, refs, 4, 16, 0,
 321                   IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
 322     }else{
 323         int i;
 324
 325         assert(IS_8X8(mb_type));
 326
 327         for(i=0; i<4; i++){
 328             const int sub_mb_type= h->sub_mb_type[i];
 329             const int n= 4*i;
 330             int y_offset= (i&2)<<2;
 331
 332             if(IS_SUB_8X8(sub_mb_type)){
 333                 get_lowest_part_y(h, refs, n  , 8, y_offset,
 334                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 335             }else if(IS_SUB_8X4(sub_mb_type)){
 336                 get_lowest_part_y(h, refs, n  , 4, y_offset,
 337                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 338                 get_lowest_part_y(h, refs, n+2, 4, y_offset+4,
 339                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 340             }else if(IS_SUB_4X8(sub_mb_type)){
 341                 get_lowest_part_y(h, refs, n  , 8, y_offset,
 342                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 343                 get_lowest_part_y(h, refs, n+1, 8, y_offset,
 344                           IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 345             }else{
 346                 int j;
 347                 assert(IS_SUB_4X4(sub_mb_type));
 348                 for(j=0; j<4; j++){
 349                     int sub_y_offset= y_offset + 2*(j&2);
 350                     get_lowest_part_y(h, refs, n+j, 4, sub_y_offset,
 351                               IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
 352                 }
 353             }
 354         }
 355     }
 356
 357     for(list=h->list_count-1; list>=0; list--){
 358         for(ref=0; ref<48 && nrefs[list]; ref++){
 359             int row = refs[list][ref];
 360             if(row >= 0){
 361                 Picture *ref_pic = &h->ref_list[list][ref];
 362                 int ref_field = ref_pic->reference - 1;
 363                 int ref_field_picture = ref_pic->field_picture;
 364                 int pic_height = 16*s->mb_height >> ref_field_picture;
 365
 366                 row <<= MB_MBAFF;
 367                 nrefs[list]--;
 368
 369                 if(!FIELD_PICTURE && ref_field_picture){ // frame referencing two fields
 370                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN((row >> 1) - !(row&1), pic_height-1), 1);
 371                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN((row >> 1)           , pic_height-1), 0);
 372                 }else if(FIELD_PICTURE && !ref_field_picture){ // field referencing one field of a frame
 373                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row*2 + ref_field    , pic_height-1), 0);
 374                 }else if(FIELD_PICTURE){
 375                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row, pic_height-1), ref_field);
 376                 }else{
 377                     ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row, pic_height-1), 0);
 378                 }
 379             }
 380         }
 381     }
 382 }
 383
 384 #if 0
 385 /**
 386  * DCT transforms the 16 dc values.
 387  * @param qp quantization parameter ??? FIXME
 388  */
 389 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
 390 //    const int qmul= dequant_coeff[qp][0];
 391     int i;
 392     int temp[16]; //FIXME check if this is a good idea
 393     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
 394     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
 395
 396     for(i=0; i<4; i++){
 397         const int offset= y_offset[i];
 398         const int z0= block[offset+stride*0] + block[offset+stride*4];
 399         const int z1= block[offset+stride*0] - block[offset+stride*4];
 400         const int z2= block[offset+stride*1] - block[offset+stride*5];
 401         const int z3= block[offset+stride*1] + block[offset+stride*5];
 402
 403         temp[4*i+0]= z0+z3;
 404         temp[4*i+1]= z1+z2;
 405         temp[4*i+2]= z1-z2;
 406         temp[4*i+3]= z0-z3;
 407     }
 408
 409     for(i=0; i<4; i++){
 410         const int offset= x_offset[i];
 411         const int z0= temp[4*0+i] + temp[4*2+i];
 412         const int z1= temp[4*0+i] - temp[4*2+i];
 413         const int z2= temp[4*1+i] - temp[4*3+i];
 414         const int z3= temp[4*1+i] + temp[4*3+i];
 415
 416         block[stride*0 +offset]= (z0 + z3)>>1;
 417         block[stride*2 +offset]= (z1 + z2)>>1;
 418         block[stride*8 +offset]= (z1 - z2)>>1;
 419         block[stride*10+offset]= (z0 - z3)>>1;
 420     }
 421 }
 422 #endif
 423
 424 #undef xStride
 425 #undef stride
 426
 427 #if 0
 428 static void chroma_dc_dct_c(DCTELEM *block){
 429     const int stride= 16*2;
 430     const int xStride= 16;
 431     int a,b,c,d,e;
 432
 433     a= block[stride*0 + xStride*0];
 434     b= block[stride*0 + xStride*1];
 435     c= block[stride*1 + xStride*0];
 436     d= block[stride*1 + xStride*1];
 437
 438     e= a-b;
 439     a= a+b;
 440     b= c-d;
 441     c= c+d;
 442
 443     block[stride*0 + xStride*0]= (a+c);
 444     block[stride*0 + xStride*1]= (e+b);
 445     block[stride*1 + xStride*0]= (a-c);
 446     block[stride*1 + xStride*1]= (e-b);
 447 }
 448 #endif
 449
 450 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
 451                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 452                            int src_x_offset, int src_y_offset,
 453                            qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op,
 454                            int pixel_shift, int chroma444){
 455     MpegEncContext * const s = &h->s;
 456     const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
 457     int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
 458     const int luma_xy= (mx&3) + ((my&3)<<2);
 459     int offset = ((mx>>2) << pixel_shift) + (my>>2)*h->mb_linesize;
 460     uint8_t * src_y = pic->data[0] + offset;
 461     uint8_t * src_cb, * src_cr;
 462     int extra_width= h->emu_edge_width;
 463     int extra_height= h->emu_edge_height;
 464     int emu=0;
 465     const int full_mx= mx>>2;
 466     const int full_my= my>>2;
 467     const int pic_width  = 16*s->mb_width;
 468     const int pic_height = 16*s->mb_height >> MB_FIELD;
 469
 470     if(mx&7) extra_width -= 3;
 471     if(my&7) extra_height -= 3;
 472
 473     if(   full_mx < 0-extra_width
 474        || full_my < 0-extra_height
 475        || full_mx + 16/*FIXME*/ > pic_width + extra_width
 476        || full_my + 16/*FIXME*/ > pic_height + extra_height){
 477         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);
 478             src_y= s->edge_emu_buffer + (2 << pixel_shift) + 2*h->mb_linesize;
 479         emu=1;
 480     }
 481
 482     qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
 483     if(!square){
 484         qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
 485     }
 486
 487     if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
 488
 489     if(chroma444){
 490         src_cb = pic->data[1] + offset;
 491         if(emu){
 492             s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cb - (2 << pixel_shift) - 2*h->mb_linesize, h->mb_linesize,
 493                                     16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
 494             src_cb= s->edge_emu_buffer + (2 << pixel_shift) + 2*h->mb_linesize;
 495         }
 496         qpix_op[luma_xy](dest_cb, src_cb, h->mb_linesize); //FIXME try variable height perhaps?
 497         if(!square){
 498             qpix_op[luma_xy](dest_cb + delta, src_cb + delta, h->mb_linesize);
 499         }
 500
 501         src_cr = pic->data[2] + offset;
 502         if(emu){
 503             s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cr - (2 << pixel_shift) - 2*h->mb_linesize, h->mb_linesize,
 504                                     16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
 505             src_cr= s->edge_emu_buffer + (2 << pixel_shift) + 2*h->mb_linesize;
 506         }
 507         qpix_op[luma_xy](dest_cr, src_cr, h->mb_linesize); //FIXME try variable height perhaps?
 508         if(!square){
 509             qpix_op[luma_xy](dest_cr + delta, src_cr + delta, h->mb_linesize);
 510         }
 511         return;
 512     }
 513
 514     if(MB_FIELD){
 515         // chroma offset when predicting from a field of opposite parity
 516         my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
 517         emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
 518     }
 519     src_cb= pic->data[1] + ((mx>>3) << pixel_shift) + (my>>3)*h->mb_uvlinesize;
 520     src_cr= pic->data[2] + ((mx>>3) << pixel_shift) + (my>>3)*h->mb_uvlinesize;
 521
 522     if(emu){
 523         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);
 524             src_cb= s->edge_emu_buffer;
 525     }
 526     chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
 527
 528     if(emu){
 529         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);
 530             src_cr= s->edge_emu_buffer;
 531     }
 532     chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
 533 }
 534
 535 static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
 536                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 537                            int x_offset, int y_offset,
 538                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 539                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 540                            int list0, int list1, int pixel_shift, int chroma444){
 541     MpegEncContext * const s = &h->s;
 542     qpel_mc_func *qpix_op=  qpix_put;
 543     h264_chroma_mc_func chroma_op= chroma_put;
 544
 545     dest_y  += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 546     if(chroma444){
 547         dest_cb += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 548         dest_cr += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 549     }else{
 550         dest_cb += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 551         dest_cr += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 552     }
 553     x_offset += 8*s->mb_x;
 554     y_offset += 8*(s->mb_y >> MB_FIELD);
 555
 556     if(list0){
 557         Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
 558         mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
 559                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 560                            qpix_op, chroma_op, pixel_shift, chroma444);
 561
 562         qpix_op=  qpix_avg;
 563         chroma_op= chroma_avg;
 564     }
 565
 566     if(list1){
 567         Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
 568         mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
 569                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
 570                            qpix_op, chroma_op, pixel_shift, chroma444);
 571     }
 572 }
 573
 574 static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
 575                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 576                            int x_offset, int y_offset,
 577                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 578                            h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
 579                            h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
 580                            int list0, int list1, int pixel_shift, int chroma444){
 581     MpegEncContext * const s = &h->s;
 582
 583     dest_y += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 584     if(chroma444){
 585         chroma_weight_avg = luma_weight_avg;
 586         chroma_weight_op = luma_weight_op;
 587         dest_cb += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 588         dest_cr += (2*x_offset << pixel_shift) + 2*y_offset*h->mb_linesize;
 589     }else{
 590         dest_cb += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 591         dest_cr += (  x_offset << pixel_shift) +   y_offset*h->mb_uvlinesize;
 592     }
 593     x_offset += 8*s->mb_x;
 594     y_offset += 8*(s->mb_y >> MB_FIELD);
 595
 596     if(list0 && list1){
 597         /* don't optimize for luma-only case, since B-frames usually
 598          * use implicit weights => chroma too. */
 599         uint8_t *tmp_cb = s->obmc_scratchpad;
 600         uint8_t *tmp_cr = s->obmc_scratchpad + (16 << pixel_shift);
 601         uint8_t *tmp_y  = s->obmc_scratchpad + 16*h->mb_uvlinesize;
 602         int refn0 = h->ref_cache[0][ scan8[n] ];
 603         int refn1 = h->ref_cache[1][ scan8[n] ];
 604
 605         mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
 606                     dest_y, dest_cb, dest_cr,
 607                     x_offset, y_offset, qpix_put, chroma_put, pixel_shift, chroma444);
 608         mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
 609                     tmp_y, tmp_cb, tmp_cr,
 610                     x_offset, y_offset, qpix_put, chroma_put, pixel_shift, chroma444);
 611
 612         if(h->use_weight == 2){
 613             int weight0 = h->implicit_weight[refn0][refn1][s->mb_y&1];
 614             int weight1 = 64 - weight0;
 615             luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
 616             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
 617             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
 618         }else{
 619             luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
 620                             h->luma_weight[refn0][0][0] , h->luma_weight[refn1][1][0],
 621                             h->luma_weight[refn0][0][1] + h->luma_weight[refn1][1][1]);
 622             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 623                             h->chroma_weight[refn0][0][0][0] , h->chroma_weight[refn1][1][0][0],
 624                             h->chroma_weight[refn0][0][0][1] + h->chroma_weight[refn1][1][0][1]);
 625             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 626                             h->chroma_weight[refn0][0][1][0] , h->chroma_weight[refn1][1][1][0],
 627                             h->chroma_weight[refn0][0][1][1] + h->chroma_weight[refn1][1][1][1]);
 628         }
 629     }else{
 630         int list = list1 ? 1 : 0;
 631         int refn = h->ref_cache[list][ scan8[n] ];
 632         Picture *ref= &h->ref_list[list][refn];
 633         mc_dir_part(h, ref, n, square, chroma_height, delta, list,
 634                     dest_y, dest_cb, dest_cr, x_offset, y_offset,
 635                     qpix_put, chroma_put, pixel_shift, chroma444);
 636
 637         luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
 638                        h->luma_weight[refn][list][0], h->luma_weight[refn][list][1]);
 639         if(h->use_weight_chroma){
 640             chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 641                              h->chroma_weight[refn][list][0][0], h->chroma_weight[refn][list][0][1]);
 642             chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
 643                              h->chroma_weight[refn][list][1][0], h->chroma_weight[refn][list][1][1]);
 644         }
 645     }
 646 }
 647
 648 static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
 649                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 650                            int x_offset, int y_offset,
 651                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
 652                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
 653                            h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 654                            int list0, int list1, int pixel_shift, int chroma444){
 655     if((h->use_weight==2 && list0 && list1
 656         && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ][h->s.mb_y&1] != 32))
 657        || h->use_weight==1)
 658         mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
 659                          x_offset, y_offset, qpix_put, chroma_put,
 660                          weight_op[0], weight_op[3], weight_avg[0],
 661                          weight_avg[3], list0, list1, pixel_shift, chroma444);
 662     else
 663         mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
 664                     x_offset, y_offset, qpix_put, chroma_put, qpix_avg,
 665                     chroma_avg, list0, list1, pixel_shift, chroma444);
 666 }
 667
 668 static inline void prefetch_motion(H264Context *h, int list, int pixel_shift, int chroma444){
 669     /* fetch pixels for estimated mv 4 macroblocks ahead
 670      * optimized for 64byte cache lines */
 671     MpegEncContext * const s = &h->s;
 672     const int refn = h->ref_cache[list][scan8[0]];
 673     if(refn >= 0){
 674         const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
 675         const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
 676         uint8_t **src= h->ref_list[list][refn].data;
 677         int off= ((mx+64)<<h->pixel_shift) + (my + (s->mb_x&3)*4)*h->mb_linesize;
 678         s->dsp.prefetch(src[0]+off, s->linesize, 4);
 679         if(chroma444){
 680             s->dsp.prefetch(src[1]+off, s->linesize, 4);
 681             s->dsp.prefetch(src[2]+off, s->linesize, 4);
 682         }else{
 683             off= (((mx>>1)+64)<<pixel_shift) + ((my>>1) + (s->mb_x&7))*s->uvlinesize;
 684             s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
 685         }
 686     }
 687 }
 688
 689 static av_always_inline void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 690                       qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
 691                       qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
 692                       h264_weight_func *weight_op, h264_biweight_func *weight_avg,
 693                       int pixel_shift, int chroma444){
 694     MpegEncContext * const s = &h->s;
 695     const int mb_xy= h->mb_xy;
 696     const int mb_type= s->current_picture.mb_type[mb_xy];
 697
 698     assert(IS_INTER(mb_type));
 699
 700     if(HAVE_PTHREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
 701         await_references(h);
 702     prefetch_motion(h, 0, pixel_shift, chroma444);
 703
 704     if(IS_16X16(mb_type)){
 705         mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
 706                 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
 707                 weight_op, weight_avg,
 708                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1),
 709                 pixel_shift, chroma444);
 710     }else if(IS_16X8(mb_type)){
 711         mc_part(h, 0, 0, 4, 8 << pixel_shift, dest_y, dest_cb, dest_cr, 0, 0,
 712                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 713                 &weight_op[1], &weight_avg[1],
 714                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1),
 715                 pixel_shift, chroma444);
 716         mc_part(h, 8, 0, 4, 8 << pixel_shift, dest_y, dest_cb, dest_cr, 0, 4,
 717                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
 718                 &weight_op[1], &weight_avg[1],
 719                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1),
 720                 pixel_shift, chroma444);
 721     }else if(IS_8X16(mb_type)){
 722         mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
 723                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 724                 &weight_op[2], &weight_avg[2],
 725                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1),
 726                 pixel_shift, chroma444);
 727         mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
 728                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 729                 &weight_op[2], &weight_avg[2],
 730                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1),
 731                 pixel_shift, chroma444);
 732     }else{
 733         int i;
 734
 735         assert(IS_8X8(mb_type));
 736
 737         for(i=0; i<4; i++){
 738             const int sub_mb_type= h->sub_mb_type[i];
 739             const int n= 4*i;
 740             int x_offset= (i&1)<<2;
 741             int y_offset= (i&2)<<1;
 742
 743             if(IS_SUB_8X8(sub_mb_type)){
 744                 mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 745                     qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
 746                     &weight_op[3], &weight_avg[3],
 747                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 748                     pixel_shift, chroma444);
 749             }else if(IS_SUB_8X4(sub_mb_type)){
 750                 mc_part(h, n  , 0, 2, 4 << pixel_shift, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 751                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 752                     &weight_op[4], &weight_avg[4],
 753                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 754                     pixel_shift, chroma444);
 755                 mc_part(h, n+2, 0, 2, 4 << pixel_shift, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
 756                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
 757                     &weight_op[4], &weight_avg[4],
 758                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 759                     pixel_shift, chroma444);
 760             }else if(IS_SUB_4X8(sub_mb_type)){
 761                 mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
 762                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 763                     &weight_op[5], &weight_avg[5],
 764                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 765                     pixel_shift, chroma444);
 766                 mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
 767                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 768                     &weight_op[5], &weight_avg[5],
 769                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 770                     pixel_shift, chroma444);
 771             }else{
 772                 int j;
 773                 assert(IS_SUB_4X4(sub_mb_type));
 774                 for(j=0; j<4; j++){
 775                     int sub_x_offset= x_offset + 2*(j&1);
 776                     int sub_y_offset= y_offset +   (j&2);
 777                     mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
 778                         qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
 779                         &weight_op[6], &weight_avg[6],
 780                         IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1),
 781                         pixel_shift, chroma444);
 782                 }
 783             }
 784         }
 785     }
 786
 787     prefetch_motion(h, 1, pixel_shift, chroma444);
 788 }
 789
 790 #define hl_motion_fn(sh, bits) \
 791 static av_always_inline void hl_motion_ ## bits(H264Context *h, \
 792                                        uint8_t *dest_y, \
 793                                        uint8_t *dest_cb, uint8_t *dest_cr, \
 794                                        qpel_mc_func (*qpix_put)[16], \
 795                                        h264_chroma_mc_func (*chroma_put), \
 796                                        qpel_mc_func (*qpix_avg)[16], \
 797                                        h264_chroma_mc_func (*chroma_avg), \
 798                                        h264_weight_func *weight_op, \
 799                                        h264_biweight_func *weight_avg, \
 800                                        int chroma444) \
 801 { \
 802     hl_motion(h, dest_y, dest_cb, dest_cr, qpix_put, chroma_put, \
 803               qpix_avg, chroma_avg, weight_op, weight_avg, sh, chroma444); \
 804 }
 805 hl_motion_fn(0, 8);
 806 hl_motion_fn(1, 16);
 807
 808 static void free_tables(H264Context *h, int free_rbsp){
 809     int i;
 810     H264Context *hx;
 811
 812     av_freep(&h->intra4x4_pred_mode);
 813     av_freep(&h->chroma_pred_mode_table);
 814     av_freep(&h->cbp_table);
 815     av_freep(&h->mvd_table[0]);
 816     av_freep(&h->mvd_table[1]);
 817     av_freep(&h->direct_table);
 818     av_freep(&h->non_zero_count);
 819     av_freep(&h->slice_table_base);
 820     h->slice_table= NULL;
 821     av_freep(&h->list_counts);
 822
 823     av_freep(&h->mb2b_xy);
 824     av_freep(&h->mb2br_xy);
 825
 826     for(i = 0; i < MAX_THREADS; i++) {
 827         hx = h->thread_context[i];
 828         if(!hx) continue;
 829         av_freep(&hx->top_borders[1]);
 830         av_freep(&hx->top_borders[0]);
 831         av_freep(&hx->s.obmc_scratchpad);
 832         if (free_rbsp){
 833             av_freep(&hx->rbsp_buffer[1]);
 834             av_freep(&hx->rbsp_buffer[0]);
 835             hx->rbsp_buffer_size[0] = 0;
 836             hx->rbsp_buffer_size[1] = 0;
 837         }
 838         if (i) av_freep(&h->thread_context[i]);
 839     }
 840 }
 841
 842 static void init_dequant8_coeff_table(H264Context *h){
 843     int i,j,q,x;
 844     const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
 845
 846     for(i=0; i<6; i++ ){
 847         h->dequant8_coeff[i] = h->dequant8_buffer[i];
 848         for(j=0; j<i; j++){
 849             if(!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i], 64*sizeof(uint8_t))){
 850                 h->dequant8_coeff[i] = h->dequant8_buffer[j];
 851                 break;
 852             }
 853         }
 854         if(j<i)
 855             continue;
 856
 857         for(q=0; q<max_qp+1; q++){
 858             int shift = div6[q];
 859             int idx = rem6[q];
 860             for(x=0; x<64; x++)
 861                 h->dequant8_coeff[i][q][(x>>3)|((x&7)<<3)] =
 862                     ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
 863                     h->pps.scaling_matrix8[i][x]) << shift;
 864         }
 865     }
 866 }
 867
 868 static void init_dequant4_coeff_table(H264Context *h){
 869     int i,j,q,x;
 870     const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
 871     for(i=0; i<6; i++ ){
 872         h->dequant4_coeff[i] = h->dequant4_buffer[i];
 873         for(j=0; j<i; j++){
 874             if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
 875                 h->dequant4_coeff[i] = h->dequant4_buffer[j];
 876                 break;
 877             }
 878         }
 879         if(j<i)
 880             continue;
 881
 882         for(q=0; q<max_qp+1; q++){
 883             int shift = div6[q] + 2;
 884             int idx = rem6[q];
 885             for(x=0; x<16; x++)
 886                 h->dequant4_coeff[i][q][(x>>2)|((x<<2)&0xF)] =
 887                     ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
 888                     h->pps.scaling_matrix4[i][x]) << shift;
 889         }
 890     }
 891 }
 892
 893 static void init_dequant_tables(H264Context *h){
 894     int i,x;
 895     init_dequant4_coeff_table(h);
 896     if(h->pps.transform_8x8_mode)
 897         init_dequant8_coeff_table(h);
 898     if(h->sps.transform_bypass){
 899         for(i=0; i<6; i++)
 900             for(x=0; x<16; x++)
 901                 h->dequant4_coeff[i][0][x] = 1<<6;
 902         if(h->pps.transform_8x8_mode)
 903             for(i=0; i<6; i++)
 904                 for(x=0; x<64; x++)
 905                     h->dequant8_coeff[i][0][x] = 1<<6;
 906     }
 907 }
 908
 909
 910 int ff_h264_alloc_tables(H264Context *h){
 911     MpegEncContext * const s = &h->s;
 912     const int big_mb_num= s->mb_stride * (s->mb_height+1);
 913     const int row_mb_num= 2*s->mb_stride*s->avctx->thread_count;
 914     int x,y;
 915
 916     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, row_mb_num * 8  * sizeof(uint8_t), fail)
 917
 918     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 48 * sizeof(uint8_t), fail)
 919     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
 920     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
 921
 922     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
 923     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*row_mb_num * sizeof(uint8_t), fail);
 924     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*row_mb_num * sizeof(uint8_t), fail);
 925     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 4*big_mb_num * sizeof(uint8_t) , fail);
 926     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
 927
 928     memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
 929     h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
 930
 931     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
 932     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
 933     for(y=0; y<s->mb_height; y++){
 934         for(x=0; x<s->mb_width; x++){
 935             const int mb_xy= x + y*s->mb_stride;
 936             const int b_xy = 4*x + 4*y*h->b_stride;
 937
 938             h->mb2b_xy [mb_xy]= b_xy;
 939             h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
 940         }
 941     }
 942
 943     s->obmc_scratchpad = NULL;
 944
 945     if(!h->dequant4_coeff[0])
 946         init_dequant_tables(h);
 947
 948     return 0;
 949 fail:
 950     free_tables(h, 1);
 951     return -1;
 952 }
 953
 954 /**
 955  * Mimic alloc_tables(), but for every context thread.
 956  */
 957 static void clone_tables(H264Context *dst, H264Context *src, int i){
 958     MpegEncContext * const s = &src->s;
 959     dst->intra4x4_pred_mode       = src->intra4x4_pred_mode + i*8*2*s->mb_stride;
 960     dst->non_zero_count           = src->non_zero_count;
 961     dst->slice_table              = src->slice_table;
 962     dst->cbp_table                = src->cbp_table;
 963     dst->mb2b_xy                  = src->mb2b_xy;
 964     dst->mb2br_xy                 = src->mb2br_xy;
 965     dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
 966     dst->mvd_table[0]             = src->mvd_table[0] + i*8*2*s->mb_stride;
 967     dst->mvd_table[1]             = src->mvd_table[1] + i*8*2*s->mb_stride;
 968     dst->direct_table             = src->direct_table;
 969     dst->list_counts              = src->list_counts;
 970
 971     dst->s.obmc_scratchpad = NULL;
 972     ff_h264_pred_init(&dst->hpc, src->s.codec_id, src->sps.bit_depth_luma);
 973 }
 974
 975 /**
 976  * Init context
 977  * Allocate buffers which are not shared amongst multiple threads.
 978  */
 979 static int context_init(H264Context *h){
 980     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * 16*3 * sizeof(uint8_t)*2, fail)
 981     FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * 16*3 * sizeof(uint8_t)*2, fail)
 982
 983     h->ref_cache[0][scan8[5 ]+1] = h->ref_cache[0][scan8[7 ]+1] = h->ref_cache[0][scan8[13]+1] =
 984     h->ref_cache[1][scan8[5 ]+1] = h->ref_cache[1][scan8[7 ]+1] = h->ref_cache[1][scan8[13]+1] = PART_NOT_AVAILABLE;
 985
 986     return 0;
 987 fail:
 988     return -1; // free_tables will clean up for us
 989 }
 990
 991 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
 992
 993 static av_cold void common_init(H264Context *h){
 994     MpegEncContext * const s = &h->s;
 995
 996     s->width = s->avctx->width;
 997     s->height = s->avctx->height;
 998     s->codec_id= s->avctx->codec->id;
 999
1000     ff_h264dsp_init(&h->h264dsp, 8);
1001     ff_h264_pred_init(&h->hpc, s->codec_id, 8);
1002
1003     h->dequant_coeff_pps= -1;
1004     s->unrestricted_mv=1;
1005     s->decode=1; //FIXME
1006
1007     dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
1008
1009     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
1010     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
1011 }
1012
1013 int ff_h264_decode_extradata(H264Context *h)
1014 {
1015     AVCodecContext *avctx = h->s.avctx;
1016
1017     if(avctx->extradata[0] == 1){
1018         int i, cnt, nalsize;
1019         unsigned char *p = avctx->extradata;
1020
1021         h->is_avc = 1;
1022
1023         if(avctx->extradata_size < 7) {
1024             av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
1025             return -1;
1026         }
1027         /* sps and pps in the avcC always have length coded with 2 bytes,
1028            so put a fake nal_length_size = 2 while parsing them */
1029         h->nal_length_size = 2;
1030         // Decode sps from avcC
1031         cnt = *(p+5) & 0x1f; // Number of sps
1032         p += 6;
1033         for (i = 0; i < cnt; i++) {
1034             nalsize = AV_RB16(p) + 2;
1035             if(decode_nal_units(h, p, nalsize) < 0) {
1036                 av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
1037                 return -1;
1038             }
1039             p += nalsize;
1040         }
1041         // Decode pps from avcC
1042         cnt = *(p++); // Number of pps
1043         for (i = 0; i < cnt; i++) {
1044             nalsize = AV_RB16(p) + 2;
1045             if (decode_nal_units(h, p, nalsize) < 0) {
1046                 av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
1047                 return -1;
1048             }
1049             p += nalsize;
1050         }
1051         // Now store right nal length size, that will be use to parse all other nals
1052         h->nal_length_size = (avctx->extradata[4] & 0x03) + 1;
1053     } else {
1054         h->is_avc = 0;
1055         if(decode_nal_units(h, avctx->extradata, avctx->extradata_size) < 0)
1056             return -1;
1057     }
1058     return 0;
1059 }
1060
1061 av_cold int ff_h264_decode_init(AVCodecContext *avctx){
1062     H264Context *h= avctx->priv_data;
1063     MpegEncContext * const s = &h->s;
1064
1065     MPV_decode_defaults(s);
1066
1067     s->avctx = avctx;
1068     common_init(h);
1069
1070     s->out_format = FMT_H264;
1071     s->workaround_bugs= avctx->workaround_bugs;
1072
1073     // set defaults
1074 //    s->decode_mb= ff_h263_decode_mb;
1075     s->quarter_sample = 1;
1076     if(!avctx->has_b_frames)
1077     s->low_delay= 1;
1078
1079     avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1080
1081     ff_h264_decode_init_vlc();
1082
1083     h->pixel_shift = 0;
1084     h->sps.bit_depth_luma = avctx->bits_per_raw_sample = 8;
1085
1086     h->thread_context[0] = h;
1087     h->outputed_poc = h->next_outputed_poc = INT_MIN;
1088     h->prev_poc_msb= 1<<16;
1089     h->x264_build = -1;
1090     ff_h264_reset_sei(h);
1091     if(avctx->codec_id == CODEC_ID_H264){
1092         if(avctx->ticks_per_frame == 1){
1093             s->avctx->time_base.den *=2;
1094         }
1095         avctx->ticks_per_frame = 2;
1096     }
1097
1098     if(avctx->extradata_size > 0 && avctx->extradata &&
1099         ff_h264_decode_extradata(h))
1100         return -1;
1101
1102     if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
1103         s->avctx->has_b_frames = h->sps.num_reorder_frames;
1104         s->low_delay = 0;
1105     }
1106
1107     return 0;
1108 }
1109
1110 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b)+(size))))
1111 static void copy_picture_range(Picture **to, Picture **from, int count, MpegEncContext *new_base, MpegEncContext *old_base)
1112 {
1113     int i;
1114
1115     for (i=0; i<count; i++){
1116         assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
1117                 IN_RANGE(from[i], old_base->picture, sizeof(Picture) * old_base->picture_count) ||
1118                 !from[i]));
1119         to[i] = REBASE_PICTURE(from[i], new_base, old_base);
1120     }
1121 }
1122
1123 static void copy_parameter_set(void **to, void **from, int count, int size)
1124 {
1125     int i;
1126
1127     for (i=0; i<count; i++){
1128         if (to[i] && !from[i]) av_freep(&to[i]);
1129         else if (from[i] && !to[i]) to[i] = av_malloc(size);
1130
1131         if (from[i]) memcpy(to[i], from[i], size);
1132     }
1133 }
1134
1135 static int decode_init_thread_copy(AVCodecContext *avctx){
1136     H264Context *h= avctx->priv_data;
1137
1138     if (!avctx->is_copy) return 0;
1139     memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1140     memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1141
1142     return 0;
1143 }
1144
1145 #define copy_fields(to, from, start_field, end_field) memcpy(&to->start_field, &from->start_field, (char*)&to->end_field - (char*)&to->start_field)
1146 static int decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src){
1147     H264Context *h= dst->priv_data, *h1= src->priv_data;
1148     MpegEncContext * const s = &h->s, * const s1 = &h1->s;
1149     int inited = s->context_initialized, err;
1150     int i;
1151
1152     if(dst == src || !s1->context_initialized) return 0;
1153
1154     err = ff_mpeg_update_thread_context(dst, src);
1155     if(err) return err;
1156
1157     //FIXME handle width/height changing
1158     if(!inited){
1159         for(i = 0; i < MAX_SPS_COUNT; i++)
1160             av_freep(h->sps_buffers + i);
1161
1162         for(i = 0; i < MAX_PPS_COUNT; i++)
1163             av_freep(h->pps_buffers + i);
1164
1165         memcpy(&h->s + 1, &h1->s + 1, sizeof(H264Context) - sizeof(MpegEncContext)); //copy all fields after MpegEnc
1166         memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1167         memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1168         ff_h264_alloc_tables(h);
1169         context_init(h);
1170
1171         for(i=0; i<2; i++){
1172             h->rbsp_buffer[i] = NULL;
1173             h->rbsp_buffer_size[i] = 0;
1174         }
1175
1176         h->thread_context[0] = h;
1177
1178         // frame_start may not be called for the next thread (if it's decoding a bottom field)
1179         // so this has to be allocated here
1180         h->s.obmc_scratchpad = av_malloc(16*6*s->linesize);
1181
1182         s->dsp.clear_blocks(h->mb);
1183         s->dsp.clear_blocks(h->mb+(24*16<<h->pixel_shift));
1184     }
1185
1186     //extradata/NAL handling
1187     h->is_avc          = h1->is_avc;
1188
1189     //SPS/PPS
1190     copy_parameter_set((void**)h->sps_buffers, (void**)h1->sps_buffers, MAX_SPS_COUNT, sizeof(SPS));
1191     h->sps             = h1->sps;
1192     copy_parameter_set((void**)h->pps_buffers, (void**)h1->pps_buffers, MAX_PPS_COUNT, sizeof(PPS));
1193     h->pps             = h1->pps;
1194
1195     //Dequantization matrices
1196     //FIXME these are big - can they be only copied when PPS changes?
1197     copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
1198
1199     for(i=0; i<6; i++)
1200         h->dequant4_coeff[i] = h->dequant4_buffer[0] + (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
1201
1202     for(i=0; i<6; i++)
1203         h->dequant8_coeff[i] = h->dequant8_buffer[0] + (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
1204
1205     h->dequant_coeff_pps = h1->dequant_coeff_pps;
1206
1207     //POC timing
1208     copy_fields(h, h1, poc_lsb, redundant_pic_count);
1209
1210     //reference lists
1211     copy_fields(h, h1, ref_count, list_count);
1212     copy_fields(h, h1, ref_list,  intra_gb);
1213     copy_fields(h, h1, short_ref, cabac_init_idc);
1214
1215     copy_picture_range(h->short_ref,   h1->short_ref,   32, s, s1);
1216     copy_picture_range(h->long_ref,    h1->long_ref,    32, s, s1);
1217     copy_picture_range(h->delayed_pic, h1->delayed_pic, MAX_DELAYED_PIC_COUNT+2, s, s1);
1218
1219     h->last_slice_type = h1->last_slice_type;
1220
1221     if(!s->current_picture_ptr) return 0;
1222
1223     if(!s->dropable) {
1224         ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1225         h->prev_poc_msb     = h->poc_msb;
1226         h->prev_poc_lsb     = h->poc_lsb;
1227     }
1228     h->prev_frame_num_offset= h->frame_num_offset;
1229     h->prev_frame_num       = h->frame_num;
1230     h->outputed_poc         = h->next_outputed_poc;
1231
1232     return 0;
1233 }
1234
1235 int ff_h264_frame_start(H264Context *h){
1236     MpegEncContext * const s = &h->s;
1237     int i;
1238     const int pixel_shift = h->pixel_shift;
1239     int thread_count = (s->avctx->active_thread_type & FF_THREAD_SLICE) ? s->avctx->thread_count : 1;
1240
1241     if(MPV_frame_start(s, s->avctx) < 0)
1242         return -1;
1243     ff_er_frame_start(s);
1244     /*
1245      * MPV_frame_start uses pict_type to derive key_frame.
1246      * This is incorrect for H.264; IDR markings must be used.
1247      * Zero here; IDR markings per slice in frame or fields are ORed in later.
1248      * See decode_nal_units().
1249      */
1250     s->current_picture_ptr->key_frame= 0;
1251     s->current_picture_ptr->mmco_reset= 0;
1252
1253     assert(s->linesize && s->uvlinesize);
1254
1255     for(i=0; i<16; i++){
1256         h->block_offset[i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
1257         h->block_offset[48+i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
1258     }
1259     for(i=0; i<16; i++){
1260         h->block_offset[16+i]=
1261         h->block_offset[32+i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
1262         h->block_offset[48+16+i]=
1263         h->block_offset[48+32+i]= (4*((scan8[i] - scan8[0])&7) << pixel_shift) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
1264     }
1265
1266     /* can't be in alloc_tables because linesize isn't known there.
1267      * FIXME: redo bipred weight to not require extra buffer? */
1268     for(i = 0; i < thread_count; i++)
1269         if(h->thread_context[i] && !h->thread_context[i]->s.obmc_scratchpad)
1270             h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*6*s->linesize);
1271
1272     /* some macroblocks can be accessed before they're available in case of lost slices, mbaff or threading*/
1273     memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
1274
1275 //    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
1276
1277     // We mark the current picture as non-reference after allocating it, so
1278     // that if we break out due to an error it can be released automatically
1279     // in the next MPV_frame_start().
1280     // SVQ3 as well as most other codecs have only last/next/current and thus
1281     // get released even with set reference, besides SVQ3 and others do not
1282     // mark frames as reference later "naturally".
1283     if(s->codec_id != CODEC_ID_SVQ3)
1284         s->current_picture_ptr->reference= 0;
1285
1286     s->current_picture_ptr->field_poc[0]=
1287     s->current_picture_ptr->field_poc[1]= INT_MAX;
1288
1289     h->next_output_pic = NULL;
1290
1291     assert(s->current_picture_ptr->long_ref==0);
1292
1293     return 0;
1294 }
1295
1296 /**
1297   * Run setup operations that must be run after slice header decoding.
1298   * This includes finding the next displayed frame.
1299   *
1300   * @param h h264 master context
1301   * @param setup_finished enough NALs have been read that we can call
1302   * ff_thread_finish_setup()
1303   */
1304 static void decode_postinit(H264Context *h, int setup_finished){
1305     MpegEncContext * const s = &h->s;
1306     Picture *out = s->current_picture_ptr;
1307     Picture *cur = s->current_picture_ptr;
1308     int i, pics, out_of_order, out_idx;
1309
1310     s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
1311     s->current_picture_ptr->pict_type= s->pict_type;
1312
1313     if (h->next_output_pic) return;
1314
1315     if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
1316         //FIXME: if we have two PAFF fields in one packet, we can't start the next thread here.
1317         //If we have one field per packet, we can. The check in decode_nal_units() is not good enough
1318         //to find this yet, so we assume the worst for now.
1319         //if (setup_finished)
1320         //    ff_thread_finish_setup(s->avctx);
1321         return;
1322     }
1323
1324     cur->interlaced_frame = 0;
1325     cur->repeat_pict = 0;
1326
1327     /* Signal interlacing information externally. */
1328     /* Prioritize picture timing SEI information over used decoding process if it exists. */
1329
1330     if(h->sps.pic_struct_present_flag){
1331         switch (h->sei_pic_struct)
1332         {
1333         case SEI_PIC_STRUCT_FRAME:
1334             break;
1335         case SEI_PIC_STRUCT_TOP_FIELD:
1336         case SEI_PIC_STRUCT_BOTTOM_FIELD:
1337             cur->interlaced_frame = 1;
1338             break;
1339         case SEI_PIC_STRUCT_TOP_BOTTOM:
1340         case SEI_PIC_STRUCT_BOTTOM_TOP:
1341             if (FIELD_OR_MBAFF_PICTURE)
1342                 cur->interlaced_frame = 1;
1343             else
1344                 // try to flag soft telecine progressive
1345                 cur->interlaced_frame = h->prev_interlaced_frame;
1346             break;
1347         case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
1348         case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
1349             // Signal the possibility of telecined film externally (pic_struct 5,6)
1350             // From these hints, let the applications decide if they apply deinterlacing.
1351             cur->repeat_pict = 1;
1352             break;
1353         case SEI_PIC_STRUCT_FRAME_DOUBLING:
1354             // Force progressive here, as doubling interlaced frame is a bad idea.
1355             cur->repeat_pict = 2;
1356             break;
1357         case SEI_PIC_STRUCT_FRAME_TRIPLING:
1358             cur->repeat_pict = 4;
1359             break;
1360         }
1361
1362         if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
1363             cur->interlaced_frame = (h->sei_ct_type & (1<<1)) != 0;
1364     }else{
1365         /* Derive interlacing flag from used decoding process. */
1366         cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
1367     }
1368     h->prev_interlaced_frame = cur->interlaced_frame;
1369
1370     if (cur->field_poc[0] != cur->field_poc[1]){
1371         /* Derive top_field_first from field pocs. */
1372         cur->top_field_first = cur->field_poc[0] < cur->field_poc[1];
1373     }else{
1374         if(cur->interlaced_frame || h->sps.pic_struct_present_flag){
1375             /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
1376             if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
1377               || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
1378                 cur->top_field_first = 1;
1379             else
1380                 cur->top_field_first = 0;
1381         }else{
1382             /* Most likely progressive */
1383             cur->top_field_first = 0;
1384         }
1385     }
1386
1387     //FIXME do something with unavailable reference frames
1388
1389     /* Sort B-frames into display order */
1390
1391     if(h->sps.bitstream_restriction_flag
1392        && s->avctx->has_b_frames < h->sps.num_reorder_frames){
1393         s->avctx->has_b_frames = h->sps.num_reorder_frames;
1394         s->low_delay = 0;
1395     }
1396
1397     if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
1398        && !h->sps.bitstream_restriction_flag){
1399         s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
1400         s->low_delay= 0;
1401     }
1402
1403     pics = 0;
1404     while(h->delayed_pic[pics]) pics++;
1405
1406     assert(pics <= MAX_DELAYED_PIC_COUNT);
1407
1408     h->delayed_pic[pics++] = cur;
1409     if(cur->reference == 0)
1410         cur->reference = DELAYED_PIC_REF;
1411
1412     out = h->delayed_pic[0];
1413     out_idx = 0;
1414     for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
1415         if(h->delayed_pic[i]->poc < out->poc){
1416             out = h->delayed_pic[i];
1417             out_idx = i;
1418         }
1419     if(s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset))
1420         h->next_outputed_poc= INT_MIN;
1421     out_of_order = out->poc < h->next_outputed_poc;
1422
1423     if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
1424         { }
1425     else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
1426        || (s->low_delay &&
1427         ((h->next_outputed_poc != INT_MIN && out->poc > h->next_outputed_poc + 2)
1428          || cur->pict_type == AV_PICTURE_TYPE_B)))
1429     {
1430         s->low_delay = 0;
1431         s->avctx->has_b_frames++;
1432     }
1433
1434     if(out_of_order || pics > s->avctx->has_b_frames){
1435         out->reference &= ~DELAYED_PIC_REF;
1436         out->owner2 = s; // for frame threading, the owner must be the second field's thread
1437                          // or else the first thread can release the picture and reuse it unsafely
1438         for(i=out_idx; h->delayed_pic[i]; i++)
1439             h->delayed_pic[i] = h->delayed_pic[i+1];
1440     }
1441     if(!out_of_order && pics > s->avctx->has_b_frames){
1442         h->next_output_pic = out;
1443         if(out_idx==0 && h->delayed_pic[0] && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset)) {
1444             h->next_outputed_poc = INT_MIN;
1445         } else
1446             h->next_outputed_poc = out->poc;
1447     }else{
1448         av_log(s->avctx, AV_LOG_DEBUG, "no picture\n");
1449     }
1450
1451     if (setup_finished)
1452         ff_thread_finish_setup(s->avctx);
1453 }
1454
1455 static inline void backup_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int chroma444, int simple){
1456     MpegEncContext * const s = &h->s;
1457     uint8_t *top_border;
1458     int top_idx = 1;
1459     const int pixel_shift = h->pixel_shift;
1460
1461     src_y  -=   linesize;
1462     src_cb -= uvlinesize;
1463     src_cr -= uvlinesize;
1464
1465     if(!simple && FRAME_MBAFF){
1466         if(s->mb_y&1){
1467             if(!MB_MBAFF){
1468                 top_border = h->top_borders[0][s->mb_x];
1469                 AV_COPY128(top_border, src_y + 15*linesize);
1470                 if (pixel_shift)
1471                     AV_COPY128(top_border+16, src_y+15*linesize+16);
1472                 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1473                     if(chroma444){
1474                         if (pixel_shift){
1475                             AV_COPY128(top_border+32, src_cb + 15*uvlinesize);
1476                             AV_COPY128(top_border+48, src_cb + 15*uvlinesize+16);
1477                             AV_COPY128(top_border+64, src_cr + 15*uvlinesize);
1478                             AV_COPY128(top_border+80, src_cr + 15*uvlinesize+16);
1479                         } else {
1480                             AV_COPY128(top_border+16, src_cb + 15*uvlinesize);
1481                             AV_COPY128(top_border+32, src_cr + 15*uvlinesize);
1482                         }
1483                     } else {
1484                         if (pixel_shift) {
1485                             AV_COPY128(top_border+32, src_cb+7*uvlinesize);
1486                             AV_COPY128(top_border+48, src_cr+7*uvlinesize);
1487                         } else {
1488                             AV_COPY64(top_border+16, src_cb+7*uvlinesize);
1489                             AV_COPY64(top_border+24, src_cr+7*uvlinesize);
1490                         }
1491                     }
1492                 }
1493             }
1494         }else if(MB_MBAFF){
1495             top_idx = 0;
1496         }else
1497             return;
1498     }
1499
1500     top_border = h->top_borders[top_idx][s->mb_x];
1501     // There are two lines saved, the line above the the top macroblock of a pair,
1502     // and the line above the bottom macroblock
1503     AV_COPY128(top_border, src_y + 16*linesize);
1504     if (pixel_shift)
1505         AV_COPY128(top_border+16, src_y+16*linesize+16);
1506
1507     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1508         if(chroma444){
1509             if (pixel_shift){
1510                 AV_COPY128(top_border+32, src_cb + 16*linesize);
1511                 AV_COPY128(top_border+48, src_cb + 16*linesize+16);
1512                 AV_COPY128(top_border+64, src_cr + 16*linesize);
1513                 AV_COPY128(top_border+80, src_cr + 16*linesize+16);
1514             } else {
1515                 AV_COPY128(top_border+16, src_cb + 16*linesize);
1516                 AV_COPY128(top_border+32, src_cr + 16*linesize);
1517             }
1518         } else {
1519             if (pixel_shift) {
1520                 AV_COPY128(top_border+32, src_cb+8*uvlinesize);
1521                 AV_COPY128(top_border+48, src_cr+8*uvlinesize);
1522             } else {
1523                 AV_COPY64(top_border+16, src_cb+8*uvlinesize);
1524                 AV_COPY64(top_border+24, src_cr+8*uvlinesize);
1525             }
1526         }
1527     }
1528 }
1529
1530 static inline void xchg_mb_border(H264Context *h, uint8_t *src_y,
1531                                   uint8_t *src_cb, uint8_t *src_cr,
1532                                   int linesize, int uvlinesize,
1533                                   int xchg, int chroma444,
1534                                   int simple, int pixel_shift){
1535     MpegEncContext * const s = &h->s;
1536     int deblock_topleft;
1537     int deblock_top;
1538     int top_idx = 1;
1539     uint8_t *top_border_m1;
1540     uint8_t *top_border;
1541
1542     if(!simple && FRAME_MBAFF){
1543         if(s->mb_y&1){
1544             if(!MB_MBAFF)
1545                 return;
1546         }else{
1547             top_idx = MB_MBAFF ? 0 : 1;
1548         }
1549     }
1550
1551     if(h->deblocking_filter == 2) {
1552         deblock_topleft = h->slice_table[h->mb_xy - 1 - s->mb_stride] == h->slice_num;
1553         deblock_top     = h->top_type;
1554     } else {
1555         deblock_topleft = (s->mb_x > 0);
1556         deblock_top     = (s->mb_y > !!MB_FIELD);
1557     }
1558
1559     src_y  -=   linesize + 1 + pixel_shift;
1560     src_cb -= uvlinesize + 1 + pixel_shift;
1561     src_cr -= uvlinesize + 1 + pixel_shift;
1562
1563     top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1564     top_border    = h->top_borders[top_idx][s->mb_x];
1565
1566 #define XCHG(a,b,xchg)\
1567     if (pixel_shift) {\
1568         if (xchg) {\
1569             AV_SWAP64(b+0,a+0);\
1570             AV_SWAP64(b+8,a+8);\
1571         } else {\
1572             AV_COPY128(b,a); \
1573         }\
1574     } else \
1575 if (xchg) AV_SWAP64(b,a);\
1576 else      AV_COPY64(b,a);
1577
1578     if(deblock_top){
1579         if(deblock_topleft){
1580             XCHG(top_border_m1 + (8 << pixel_shift), src_y - (7 << pixel_shift), 1);
1581         }
1582         XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);
1583         XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);
1584         if(s->mb_x+1 < s->mb_width){
1585             XCHG(h->top_borders[top_idx][s->mb_x+1], src_y + (17 << pixel_shift), 1);
1586         }
1587     }
1588     if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1589         if(chroma444){
1590             if(deblock_topleft){
1591                 XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);
1592                 XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);
1593             }
1594             XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);
1595             XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);
1596             XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);
1597             XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);
1598             if(s->mb_x+1 < s->mb_width){
1599                 XCHG(h->top_borders[top_idx][s->mb_x+1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);
1600                 XCHG(h->top_borders[top_idx][s->mb_x+1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);
1601             }
1602         } else {
1603             if(deblock_top){
1604                 if(deblock_topleft){
1605                     XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);
1606                     XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);
1607                 }
1608                 XCHG(top_border + (16 << pixel_shift), src_cb+1+pixel_shift, 1);
1609                 XCHG(top_border + (24 << pixel_shift), src_cr+1+pixel_shift, 1);
1610             }
1611         }
1612     }
1613 }
1614
1615 static av_always_inline int dctcoef_get(DCTELEM *mb, int high_bit_depth, int index) {
1616     if (high_bit_depth) {
1617         return AV_RN32A(((int32_t*)mb) + index);
1618     } else
1619         return AV_RN16A(mb + index);
1620 }
1621
1622 static av_always_inline void dctcoef_set(DCTELEM *mb, int high_bit_depth, int index, int value) {
1623     if (high_bit_depth) {
1624         AV_WN32A(((int32_t*)mb) + index, value);
1625     } else
1626         AV_WN16A(mb + index, value);
1627 }
1628
1629 static av_always_inline void hl_decode_mb_predict_luma(H264Context *h, int mb_type, int is_h264, int simple, int transform_bypass,
1630                                                        int pixel_shift, int *block_offset, int linesize, uint8_t *dest_y, int p)
1631 {
1632     MpegEncContext * const s = &h->s;
1633     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1634     void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1635     int i;
1636     int qscale = p == 0 ? s->qscale : h->chroma_qp[p-1];
1637     block_offset += 16*p;
1638     if(IS_INTRA4x4(mb_type)){
1639         if(simple || !s->encoding){
1640             if(IS_8x8DCT(mb_type)){
1641                 if(transform_bypass){
1642                     idct_dc_add =
1643                     idct_add    = s->dsp.add_pixels8;
1644                 }else{
1645                     idct_dc_add = h->h264dsp.h264_idct8_dc_add;
1646                     idct_add    = h->h264dsp.h264_idct8_add;
1647                 }
1648                 for(i=0; i<16; i+=4){
1649                     uint8_t * const ptr= dest_y + block_offset[i];
1650                     const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1651                     if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1652                         h->hpc.pred8x8l_add[dir](ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1653                     }else{
1654                         const int nnz = h->non_zero_count_cache[ scan8[i+p*16] ];
1655                         h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1656                                                     (h->topright_samples_available<<i)&0x4000, linesize);
1657                         if(nnz){
1658                             if(nnz == 1 && dctcoef_get(h->mb, pixel_shift, i*16+p*256))
1659                                 idct_dc_add(ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1660                             else
1661                                 idct_add   (ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1662                         }
1663                     }
1664                 }
1665             }else{
1666                 if(transform_bypass){
1667                     idct_dc_add =
1668                     idct_add    = s->dsp.add_pixels4;
1669                 }else{
1670                     idct_dc_add = h->h264dsp.h264_idct_dc_add;
1671                     idct_add    = h->h264dsp.h264_idct_add;
1672                 }
1673                 for(i=0; i<16; i++){
1674                     uint8_t * const ptr= dest_y + block_offset[i];
1675                     const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1676
1677                     if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1678                         h->hpc.pred4x4_add[dir](ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1679                     }else{
1680                         uint8_t *topright;
1681                         int nnz, tr;
1682                         uint64_t tr_high;
1683                         if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1684                             const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1685                             assert(s->mb_y || linesize <= block_offset[i]);
1686                             if(!topright_avail){
1687                                 if (pixel_shift) {
1688                                     tr_high= ((uint16_t*)ptr)[3 - linesize/2]*0x0001000100010001ULL;
1689                                     topright= (uint8_t*) &tr_high;
1690                                 } else {
1691                                     tr= ptr[3 - linesize]*0x01010101;
1692                                     topright= (uint8_t*) &tr;
1693                                 }
1694                             }else
1695                                 topright= ptr + (4 << pixel_shift) - linesize;
1696                         }else
1697                             topright= NULL;
1698
1699                         h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1700                         nnz = h->non_zero_count_cache[ scan8[i+p*16] ];
1701                         if(nnz){
1702                             if(is_h264){
1703                                 if(nnz == 1 && dctcoef_get(h->mb, pixel_shift, i*16+p*256))
1704                                     idct_dc_add(ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1705                                 else
1706                                     idct_add   (ptr, h->mb + (i*16+p*256 << pixel_shift), linesize);
1707                             }else
1708                                 ff_svq3_add_idct_c(ptr, h->mb + i*16+p*256, linesize, qscale, 0);
1709                         }
1710                     }
1711                 }
1712             }
1713         }
1714     }else{
1715         h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1716         if(is_h264){
1717             if(h->non_zero_count_cache[ scan8[LUMA_DC_BLOCK_INDEX+p] ]){
1718                 if(!transform_bypass)
1719                     h->h264dsp.h264_luma_dc_dequant_idct(h->mb+(p*256 << pixel_shift), h->mb_luma_dc[p], h->dequant4_coeff[p][qscale][0]);
1720                 else{
1721                     static const uint8_t dc_mapping[16] = { 0*16, 1*16, 4*16, 5*16, 2*16, 3*16, 6*16, 7*16,
1722                                                             8*16, 9*16,12*16,13*16,10*16,11*16,14*16,15*16};
1723                     for(i = 0; i < 16; i++)
1724                         dctcoef_set(h->mb+p*256, pixel_shift, dc_mapping[i], dctcoef_get(h->mb_luma_dc[p], pixel_shift, i));
1725                 }
1726             }
1727         }else
1728             ff_svq3_luma_dc_dequant_idct_c(h->mb+p*256, h->mb_luma_dc[p], qscale);
1729     }
1730 }
1731
1732 static av_always_inline void hl_decode_mb_idct_luma(H264Context *h, int mb_type, int is_h264, int simple, int transform_bypass,
1733                                                     int pixel_shift, int *block_offset, int linesize, uint8_t *dest_y, int p)
1734 {
1735     MpegEncContext * const s = &h->s;
1736     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1737     int i;
1738     block_offset += 16*p;
1739     if(!IS_INTRA4x4(mb_type)){
1740         if(is_h264){
1741             if(IS_INTRA16x16(mb_type)){
1742                 if(transform_bypass){
1743                     if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1744                         h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize);
1745                     }else{
1746                         for(i=0; i<16; i++){
1747                             if(h->non_zero_count_cache[ scan8[i+p*16] ] || dctcoef_get(h->mb, pixel_shift, i*16+p*256))
1748                                 s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + (i*16+p*256 << pixel_shift), linesize);
1749                         }
1750                     }
1751                 }else{
1752                     h->h264dsp.h264_idct_add16intra(dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize, h->non_zero_count_cache+p*5*8);
1753                 }
1754             }else if(h->cbp&15){
1755                 if(transform_bypass){
1756                     const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1757                     idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1758                     for(i=0; i<16; i+=di){
1759                         if(h->non_zero_count_cache[ scan8[i+p*16] ]){
1760                             idct_add(dest_y + block_offset[i], h->mb + (i*16+p*256 << pixel_shift), linesize);
1761                         }
1762                     }
1763                 }else{
1764                     if(IS_8x8DCT(mb_type)){
1765                         h->h264dsp.h264_idct8_add4(dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize, h->non_zero_count_cache+p*5*8);
1766                     }else{
1767                         h->h264dsp.h264_idct_add16(dest_y, block_offset, h->mb + (p*256 << pixel_shift), linesize, h->non_zero_count_cache+p*5*8);
1768                     }
1769                 }
1770             }
1771         }else{
1772             for(i=0; i<16; i++){
1773                 if(h->non_zero_count_cache[ scan8[i+p*16] ] || h->mb[i*16+p*256]){ //FIXME benchmark weird rule, & below
1774                     uint8_t * const ptr= dest_y + block_offset[i];
1775                     ff_svq3_add_idct_c(ptr, h->mb + i*16 + p*256, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1776                 }
1777             }
1778         }
1779     }
1780 }
1781
1782 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple, int pixel_shift){
1783     MpegEncContext * const s = &h->s;
1784     const int mb_x= s->mb_x;
1785     const int mb_y= s->mb_y;
1786     const int mb_xy= h->mb_xy;
1787     const int mb_type= s->current_picture.mb_type[mb_xy];
1788     uint8_t  *dest_y, *dest_cb, *dest_cr;
1789     int linesize, uvlinesize /*dct_offset*/;
1790     int i, j;
1791     int *block_offset = &h->block_offset[0];
1792     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1793     /* is_h264 should always be true if SVQ3 is disabled. */
1794     const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1795     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1796
1797     dest_y  = s->current_picture.data[0] + ((mb_x << pixel_shift) + mb_y * s->linesize  ) * 16;
1798     dest_cb = s->current_picture.data[1] + ((mb_x << pixel_shift) + mb_y * s->uvlinesize) * 8;
1799     dest_cr = s->current_picture.data[2] + ((mb_x << pixel_shift) + mb_y * s->uvlinesize) * 8;
1800
1801     s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + (64 << pixel_shift), s->linesize, 4);
1802     s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + (64 << pixel_shift), dest_cr - dest_cb, 2);
1803
1804     h->list_counts[mb_xy]= h->list_count;
1805
1806     if (!simple && MB_FIELD) {
1807         linesize   = h->mb_linesize   = s->linesize * 2;
1808         uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1809         block_offset = &h->block_offset[48];
1810         if(mb_y&1){ //FIXME move out of this function?
1811             dest_y -= s->linesize*15;
1812             dest_cb-= s->uvlinesize*7;
1813             dest_cr-= s->uvlinesize*7;
1814         }
1815         if(FRAME_MBAFF) {
1816             int list;
1817             for(list=0; list<h->list_count; list++){
1818                 if(!USES_LIST(mb_type, list))
1819                     continue;
1820                 if(IS_16X16(mb_type)){
1821                     int8_t *ref = &h->ref_cache[list][scan8[0]];
1822                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1823                 }else{
1824                     for(i=0; i<16; i+=4){
1825                         int ref = h->ref_cache[list][scan8[i]];
1826                         if(ref >= 0)
1827                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1828                     }
1829                 }
1830             }
1831         }
1832     } else {
1833         linesize   = h->mb_linesize   = s->linesize;
1834         uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1835 //        dct_offset = s->linesize * 16;
1836     }
1837
1838     if (!simple && IS_INTRA_PCM(mb_type)) {
1839         if (pixel_shift) {
1840             const int bit_depth = h->sps.bit_depth_luma;
1841             int j;
1842             GetBitContext gb;
1843             init_get_bits(&gb, (uint8_t*)h->mb, 384*bit_depth);
1844
1845             for (i = 0; i < 16; i++) {
1846                 uint16_t *tmp_y  = (uint16_t*)(dest_y  + i*linesize);
1847                 for (j = 0; j < 16; j++)
1848                     tmp_y[j] = get_bits(&gb, bit_depth);
1849             }
1850             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1851                 for (i = 0; i < 8; i++) {
1852                     uint16_t *tmp_cb = (uint16_t*)(dest_cb + i*uvlinesize);
1853                     for (j = 0; j < 8; j++)
1854                         tmp_cb[j] = get_bits(&gb, bit_depth);
1855                 }
1856                 for (i = 0; i < 8; i++) {
1857                     uint16_t *tmp_cr = (uint16_t*)(dest_cr + i*uvlinesize);
1858                     for (j = 0; j < 8; j++)
1859                         tmp_cr[j] = get_bits(&gb, bit_depth);
1860                 }
1861             }
1862         } else {
1863             for (i=0; i<16; i++) {
1864                 memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1865             }
1866             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1867                 for (i=0; i<8; i++) {
1868                     memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
1869                     memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
1870                 }
1871             }
1872         }
1873     } else {
1874         if(IS_INTRA(mb_type)){
1875             if(h->deblocking_filter)
1876                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, 0, simple, pixel_shift);
1877
1878             if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1879                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1880                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1881             }
1882
1883             hl_decode_mb_predict_luma(h, mb_type, is_h264, simple, transform_bypass, pixel_shift, block_offset, linesize, dest_y, 0);
1884
1885             if(h->deblocking_filter)
1886                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, 0, simple, pixel_shift);
1887         }else if(is_h264){
1888             if (pixel_shift) {
1889                 hl_motion_16(h, dest_y, dest_cb, dest_cr,
1890                              s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1891                              s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1892                              h->h264dsp.weight_h264_pixels_tab,
1893                              h->h264dsp.biweight_h264_pixels_tab, 0);
1894             } else
1895                 hl_motion_8(h, dest_y, dest_cb, dest_cr,
1896                             s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1897                             s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1898                             h->h264dsp.weight_h264_pixels_tab,
1899                             h->h264dsp.biweight_h264_pixels_tab, 0);
1900         }
1901
1902         hl_decode_mb_idct_luma(h, mb_type, is_h264, simple, transform_bypass, pixel_shift, block_offset, linesize, dest_y, 0);
1903
1904         if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1905             uint8_t *dest[2] = {dest_cb, dest_cr};
1906             if(transform_bypass){
1907                 if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1908                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + (16*16*1 << pixel_shift), uvlinesize);
1909                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 32, h->mb + (16*16*2 << pixel_shift), uvlinesize);
1910                 }else{
1911                     idct_add = s->dsp.add_pixels4;
1912                     for(j=1; j<3; j++){
1913                         for(i=j*16; i<j*16+4; i++){
1914                             if(h->non_zero_count_cache[ scan8[i] ] || dctcoef_get(h->mb, pixel_shift, i*16))
1915                                 idct_add   (dest[j-1] + block_offset[i], h->mb + (i*16 << pixel_shift), uvlinesize);
1916                         }
1917                     }
1918                 }
1919             }else{
1920                 if(is_h264){
1921                     if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+0] ])
1922                         h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + (16*16*1 << pixel_shift), h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
1923                     if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+1] ])
1924                         h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + (16*16*2 << pixel_shift), h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
1925                     h->h264dsp.h264_idct_add8(dest, block_offset,
1926                                               h->mb, uvlinesize,
1927                                               h->non_zero_count_cache);
1928                 }
1929 #if CONFIG_SVQ3_DECODER
1930                 else{
1931                     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]);
1932                     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]);
1933                     for(j=1; j<3; j++){
1934                         for(i=j*16; i<j*16+4; i++){
1935                             if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1936                                 uint8_t * const ptr= dest[j-1] + block_offset[i];
1937                                 ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[0][s->qscale + 12] - 12, 2);
1938                             }
1939                         }
1940                     }
1941                 }
1942 #endif
1943             }
1944         }
1945     }
1946     if(h->cbp || IS_INTRA(mb_type))
1947     {
1948         s->dsp.clear_blocks(h->mb);
1949         s->dsp.clear_blocks(h->mb+(24*16<<pixel_shift));
1950     }
1951 }
1952
1953 static av_always_inline void hl_decode_mb_444_internal(H264Context *h, int simple, int pixel_shift){
1954     MpegEncContext * const s = &h->s;
1955     const int mb_x= s->mb_x;
1956     const int mb_y= s->mb_y;
1957     const int mb_xy= h->mb_xy;
1958     const int mb_type= s->current_picture.mb_type[mb_xy];
1959     uint8_t  *dest[3];
1960     int linesize;
1961     int i, j, p;
1962     int *block_offset = &h->block_offset[0];
1963     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1964     const int plane_count = (simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) ? 3 : 1;
1965
1966     for (p = 0; p < plane_count; p++)
1967     {
1968         dest[p] = s->current_picture.data[p] + ((mb_x << pixel_shift) + mb_y * s->linesize) * 16;
1969         s->dsp.prefetch(dest[p] + (s->mb_x&3)*4*s->linesize + (64 << pixel_shift), s->linesize, 4);
1970     }
1971
1972     h->list_counts[mb_xy]= h->list_count;
1973
1974     if (!simple && MB_FIELD) {
1975         linesize   = h->mb_linesize = h->mb_uvlinesize = s->linesize * 2;
1976         block_offset = &h->block_offset[48];
1977         if(mb_y&1) //FIXME move out of this function?
1978             for (p = 0; p < 3; p++)
1979                 dest[p] -= s->linesize*15;
1980         if(FRAME_MBAFF) {
1981             int list;
1982             for(list=0; list<h->list_count; list++){
1983                 if(!USES_LIST(mb_type, list))
1984                     continue;
1985                 if(IS_16X16(mb_type)){
1986                     int8_t *ref = &h->ref_cache[list][scan8[0]];
1987                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1988                 }else{
1989                     for(i=0; i<16; i+=4){
1990                         int ref = h->ref_cache[list][scan8[i]];
1991                         if(ref >= 0)
1992                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1993                     }
1994                 }
1995             }
1996         }
1997     } else {
1998         linesize   = h->mb_linesize = h->mb_uvlinesize = s->linesize;
1999     }
2000
2001     if (!simple && IS_INTRA_PCM(mb_type)) {
2002         if (pixel_shift) {
2003             const int bit_depth = h->sps.bit_depth_luma;
2004             GetBitContext gb;
2005             init_get_bits(&gb, (uint8_t*)h->mb, 768*bit_depth);
2006
2007             for (p = 0; p < plane_count; p++) {
2008                 for (i = 0; i < 16; i++) {
2009                     uint16_t *tmp = (uint16_t*)(dest[p] + i*linesize);
2010                     for (j = 0; j < 16; j++)
2011                         tmp[j] = get_bits(&gb, bit_depth);
2012                 }
2013             }
2014         } else {
2015             for (p = 0; p < plane_count; p++) {
2016                 for (i = 0; i < 16; i++) {
2017                     memcpy(dest[p] + i*linesize, h->mb + p*128 + i*8, 16);
2018                 }
2019             }
2020         }
2021     } else {
2022         if(IS_INTRA(mb_type)){
2023             if(h->deblocking_filter)
2024                 xchg_mb_border(h, dest[0], dest[1], dest[2], linesize, linesize, 1, 1, simple, pixel_shift);
2025
2026             for (p = 0; p < plane_count; p++)
2027                 hl_decode_mb_predict_luma(h, mb_type, 1, simple, transform_bypass, pixel_shift, block_offset, linesize, dest[p], p);
2028
2029             if(h->deblocking_filter)
2030                 xchg_mb_border(h, dest[0], dest[1], dest[2], linesize, linesize, 0, 1, simple, pixel_shift);
2031         }else{
2032             if (pixel_shift) {
2033                 hl_motion_16(h, dest[0], dest[1], dest[2],
2034                              s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2035                              s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2036                              h->h264dsp.weight_h264_pixels_tab,
2037                              h->h264dsp.biweight_h264_pixels_tab, 1);
2038             } else
2039                 hl_motion_8(h, dest[0], dest[1], dest[2],
2040                             s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2041                             s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2042                             h->h264dsp.weight_h264_pixels_tab,
2043                             h->h264dsp.biweight_h264_pixels_tab, 1);
2044         }
2045
2046         for (p = 0; p < plane_count; p++)
2047             hl_decode_mb_idct_luma(h, mb_type, 1, simple, transform_bypass, pixel_shift, block_offset, linesize, dest[p], p);
2048     }
2049     if(h->cbp || IS_INTRA(mb_type))
2050     {
2051         s->dsp.clear_blocks(h->mb);
2052         s->dsp.clear_blocks(h->mb+(24*16<<pixel_shift));
2053     }
2054 }
2055
2056 /**
2057  * Process a macroblock; this case avoids checks for expensive uncommon cases.
2058  */
2059 #define hl_decode_mb_simple(sh, bits) \
2060 static void hl_decode_mb_simple_ ## bits(H264Context *h){ \
2061     hl_decode_mb_internal(h, 1, sh); \
2062 }
2063 hl_decode_mb_simple(0, 8);
2064 hl_decode_mb_simple(1, 16);
2065
2066 /**
2067  * Process a macroblock; this handles edge cases, such as interlacing.
2068  */
2069 static void av_noinline hl_decode_mb_complex(H264Context *h){
2070     hl_decode_mb_internal(h, 0, h->pixel_shift);
2071 }
2072
2073 static void av_noinline hl_decode_mb_444_complex(H264Context *h){
2074     hl_decode_mb_444_internal(h, 0, h->pixel_shift);
2075 }
2076
2077 static void av_noinline hl_decode_mb_444_simple(H264Context *h){
2078     hl_decode_mb_444_internal(h, 1, 0);
2079 }
2080
2081 void ff_h264_hl_decode_mb(H264Context *h){
2082     MpegEncContext * const s = &h->s;
2083     const int mb_xy= h->mb_xy;
2084     const int mb_type= s->current_picture.mb_type[mb_xy];
2085     int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
2086
2087     if (CHROMA444) {
2088         if(is_complex || h->pixel_shift)
2089             hl_decode_mb_444_complex(h);
2090         else
2091             hl_decode_mb_444_simple(h);
2092     } else if (is_complex) {
2093         hl_decode_mb_complex(h);
2094     } else if (h->pixel_shift) {
2095         hl_decode_mb_simple_16(h);
2096     } else
2097         hl_decode_mb_simple_8(h);
2098 }
2099
2100 static int pred_weight_table(H264Context *h){
2101     MpegEncContext * const s = &h->s;
2102     int list, i;
2103     int luma_def, chroma_def;
2104
2105     h->use_weight= 0;
2106     h->use_weight_chroma= 0;
2107     h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
2108     if(h->sps.chroma_format_idc)
2109         h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
2110     luma_def = 1<<h->luma_log2_weight_denom;
2111     chroma_def = 1<<h->chroma_log2_weight_denom;
2112
2113     for(list=0; list<2; list++){
2114         h->luma_weight_flag[list]   = 0;
2115         h->chroma_weight_flag[list] = 0;
2116         for(i=0; i<h->ref_count[list]; i++){
2117             int luma_weight_flag, chroma_weight_flag;
2118
2119             luma_weight_flag= get_bits1(&s->gb);
2120             if(luma_weight_flag){
2121                 h->luma_weight[i][list][0]= get_se_golomb(&s->gb);
2122                 h->luma_weight[i][list][1]= get_se_golomb(&s->gb);
2123                 if(   h->luma_weight[i][list][0] != luma_def
2124                    || h->luma_weight[i][list][1] != 0) {
2125                     h->use_weight= 1;
2126                     h->luma_weight_flag[list]= 1;
2127                 }
2128             }else{
2129                 h->luma_weight[i][list][0]= luma_def;
2130                 h->luma_weight[i][list][1]= 0;
2131             }
2132
2133             if(h->sps.chroma_format_idc){
2134                 chroma_weight_flag= get_bits1(&s->gb);
2135                 if(chroma_weight_flag){
2136                     int j;
2137                     for(j=0; j<2; j++){
2138                         h->chroma_weight[i][list][j][0]= get_se_golomb(&s->gb);
2139                         h->chroma_weight[i][list][j][1]= get_se_golomb(&s->gb);
2140                         if(   h->chroma_weight[i][list][j][0] != chroma_def
2141                            || h->chroma_weight[i][list][j][1] != 0) {
2142                             h->use_weight_chroma= 1;
2143                             h->chroma_weight_flag[list]= 1;
2144                         }
2145                     }
2146                 }else{
2147                     int j;
2148                     for(j=0; j<2; j++){
2149                         h->chroma_weight[i][list][j][0]= chroma_def;
2150                         h->chroma_weight[i][list][j][1]= 0;
2151                     }
2152                 }
2153             }
2154         }
2155         if(h->slice_type_nos != AV_PICTURE_TYPE_B) break;
2156     }
2157     h->use_weight= h->use_weight || h->use_weight_chroma;
2158     return 0;
2159 }
2160
2161 /**
2162  * Initialize implicit_weight table.
2163  * @param field  0/1 initialize the weight for interlaced MBAFF
2164  *                -1 initializes the rest
2165  */
2166 static void implicit_weight_table(H264Context *h, int field){
2167     MpegEncContext * const s = &h->s;
2168     int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
2169
2170     for (i = 0; i < 2; i++) {
2171         h->luma_weight_flag[i]   = 0;
2172         h->chroma_weight_flag[i] = 0;
2173     }
2174
2175     if(field < 0){
2176         cur_poc = s->current_picture_ptr->poc;
2177     if(   h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF
2178        && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
2179         h->use_weight= 0;
2180         h->use_weight_chroma= 0;
2181         return;
2182     }
2183         ref_start= 0;
2184         ref_count0= h->ref_count[0];
2185         ref_count1= h->ref_count[1];
2186     }else{
2187         cur_poc = s->current_picture_ptr->field_poc[field];
2188         ref_start= 16;
2189         ref_count0= 16+2*h->ref_count[0];
2190         ref_count1= 16+2*h->ref_count[1];
2191     }
2192
2193     h->use_weight= 2;
2194     h->use_weight_chroma= 2;
2195     h->luma_log2_weight_denom= 5;
2196     h->chroma_log2_weight_denom= 5;
2197
2198     for(ref0=ref_start; ref0 < ref_count0; ref0++){
2199         int poc0 = h->ref_list[0][ref0].poc;
2200         for(ref1=ref_start; ref1 < ref_count1; ref1++){
2201             int poc1 = h->ref_list[1][ref1].poc;
2202             int td = av_clip(poc1 - poc0, -128, 127);
2203             int w= 32;
2204             if(td){
2205                 int tb = av_clip(cur_poc - poc0, -128, 127);
2206                 int tx = (16384 + (FFABS(td) >> 1)) / td;
2207                 int dist_scale_factor = (tb*tx + 32) >> 8;
2208                 if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
2209                     w = 64 - dist_scale_factor;
2210             }
2211             if(field<0){
2212                 h->implicit_weight[ref0][ref1][0]=
2213                 h->implicit_weight[ref0][ref1][1]= w;
2214             }else{
2215                 h->implicit_weight[ref0][ref1][field]=w;
2216             }
2217         }
2218     }
2219 }
2220
2221 /**
2222  * instantaneous decoder refresh.
2223  */
2224 static void idr(H264Context *h){
2225     ff_h264_remove_all_refs(h);
2226     h->prev_frame_num= 0;
2227     h->prev_frame_num_offset= 0;
2228     h->prev_poc_msb=
2229     h->prev_poc_lsb= 0;
2230 }
2231
2232 /* forget old pics after a seek */
2233 static void flush_dpb(AVCodecContext *avctx){
2234     H264Context *h= avctx->priv_data;
2235     int i;
2236     for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
2237         if(h->delayed_pic[i])
2238             h->delayed_pic[i]->reference= 0;
2239         h->delayed_pic[i]= NULL;
2240     }
2241     h->outputed_poc=h->next_outputed_poc= INT_MIN;
2242     h->prev_interlaced_frame = 1;
2243     idr(h);
2244     if(h->s.current_picture_ptr)
2245         h->s.current_picture_ptr->reference= 0;
2246     h->s.first_field= 0;
2247     ff_h264_reset_sei(h);
2248     ff_mpeg_flush(avctx);
2249 }
2250
2251 static int init_poc(H264Context *h){
2252     MpegEncContext * const s = &h->s;
2253     const int max_frame_num= 1<<h->sps.log2_max_frame_num;
2254     int field_poc[2];
2255     Picture *cur = s->current_picture_ptr;
2256
2257     h->frame_num_offset= h->prev_frame_num_offset;
2258     if(h->frame_num < h->prev_frame_num)
2259         h->frame_num_offset += max_frame_num;
2260
2261     if(h->sps.poc_type==0){
2262         const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
2263
2264         if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
2265             h->poc_msb = h->prev_poc_msb + max_poc_lsb;
2266         else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
2267             h->poc_msb = h->prev_poc_msb - max_poc_lsb;
2268         else
2269             h->poc_msb = h->prev_poc_msb;
2270 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
2271         field_poc[0] =
2272         field_poc[1] = h->poc_msb + h->poc_lsb;
2273         if(s->picture_structure == PICT_FRAME)
2274             field_poc[1] += h->delta_poc_bottom;
2275     }else if(h->sps.poc_type==1){
2276         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
2277         int i;
2278
2279         if(h->sps.poc_cycle_length != 0)
2280             abs_frame_num = h->frame_num_offset + h->frame_num;
2281         else
2282             abs_frame_num = 0;
2283
2284         if(h->nal_ref_idc==0 && abs_frame_num > 0)
2285             abs_frame_num--;
2286
2287         expected_delta_per_poc_cycle = 0;
2288         for(i=0; i < h->sps.poc_cycle_length; i++)
2289             expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
2290
2291         if(abs_frame_num > 0){
2292             int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
2293             int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
2294
2295             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
2296             for(i = 0; i <= frame_num_in_poc_cycle; i++)
2297                 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
2298         } else
2299             expectedpoc = 0;
2300
2301         if(h->nal_ref_idc == 0)
2302             expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
2303
2304         field_poc[0] = expectedpoc + h->delta_poc[0];
2305         field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
2306
2307         if(s->picture_structure == PICT_FRAME)
2308             field_poc[1] += h->delta_poc[1];
2309     }else{
2310         int poc= 2*(h->frame_num_offset + h->frame_num);
2311
2312         if(!h->nal_ref_idc)
2313             poc--;
2314
2315         field_poc[0]= poc;
2316         field_poc[1]= poc;
2317     }
2318
2319     if(s->picture_structure != PICT_BOTTOM_FIELD)
2320         s->current_picture_ptr->field_poc[0]= field_poc[0];
2321     if(s->picture_structure != PICT_TOP_FIELD)
2322         s->current_picture_ptr->field_poc[1]= field_poc[1];
2323     cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
2324
2325     return 0;
2326 }
2327
2328
2329 /**
2330  * initialize scan tables
2331  */
2332 static void init_scan_tables(H264Context *h){
2333     int i;
2334     for(i=0; i<16; i++){
2335 #define T(x) (x>>2) | ((x<<2) & 0xF)
2336         h->zigzag_scan[i] = T(zigzag_scan[i]);
2337         h-> field_scan[i] = T( field_scan[i]);
2338 #undef T
2339     }
2340     for(i=0; i<64; i++){
2341 #define T(x) (x>>3) | ((x&7)<<3)
2342         h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
2343         h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
2344         h->field_scan8x8[i]        = T(field_scan8x8[i]);
2345         h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
2346 #undef T
2347     }
2348     if(h->sps.transform_bypass){ //FIXME same ugly
2349         h->zigzag_scan_q0          = zigzag_scan;
2350         h->zigzag_scan8x8_q0       = ff_zigzag_direct;
2351         h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
2352         h->field_scan_q0           = field_scan;
2353         h->field_scan8x8_q0        = field_scan8x8;
2354         h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
2355     }else{
2356         h->zigzag_scan_q0          = h->zigzag_scan;
2357         h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
2358         h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
2359         h->field_scan_q0           = h->field_scan;
2360         h->field_scan8x8_q0        = h->field_scan8x8;
2361         h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
2362     }
2363 }
2364
2365 static void field_end(H264Context *h, int in_setup){
2366     MpegEncContext * const s = &h->s;
2367     AVCodecContext * const avctx= s->avctx;
2368     s->mb_y= 0;
2369
2370     if (!in_setup && !s->dropable)
2371         ff_thread_report_progress((AVFrame*)s->current_picture_ptr, (16*s->mb_height >> FIELD_PICTURE) - 1,
2372                                  s->picture_structure==PICT_BOTTOM_FIELD);
2373
2374     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2375         ff_vdpau_h264_set_reference_frames(s);
2376
2377     if(in_setup || !(avctx->active_thread_type&FF_THREAD_FRAME)){
2378         if(!s->dropable) {
2379             ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
2380             h->prev_poc_msb= h->poc_msb;
2381             h->prev_poc_lsb= h->poc_lsb;
2382         }
2383         h->prev_frame_num_offset= h->frame_num_offset;
2384         h->prev_frame_num= h->frame_num;
2385         h->outputed_poc = h->next_outputed_poc;
2386     }
2387
2388     if (avctx->hwaccel) {
2389         if (avctx->hwaccel->end_frame(avctx) < 0)
2390             av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
2391     }
2392
2393     if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2394         ff_vdpau_h264_picture_complete(s);
2395
2396     /*
2397      * FIXME: Error handling code does not seem to support interlaced
2398      * when slices span multiple rows
2399      * The ff_er_add_slice calls don't work right for bottom
2400      * fields; they cause massive erroneous error concealing
2401      * Error marking covers both fields (top and bottom).
2402      * This causes a mismatched s->error_count
2403      * and a bad error table. Further, the error count goes to
2404      * INT_MAX when called for bottom field, because mb_y is
2405      * past end by one (callers fault) and resync_mb_y != 0
2406      * causes problems for the first MB line, too.
2407      */
2408     if (!FIELD_PICTURE)
2409         ff_er_frame_end(s);
2410
2411     MPV_frame_end(s);
2412
2413     h->current_slice=0;
2414 }
2415
2416 /**
2417  * Replicate H264 "master" context to thread contexts.
2418  */
2419 static void clone_slice(H264Context *dst, H264Context *src)
2420 {
2421     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
2422     dst->s.current_picture_ptr  = src->s.current_picture_ptr;
2423     dst->s.current_picture      = src->s.current_picture;
2424     dst->s.linesize             = src->s.linesize;
2425     dst->s.uvlinesize           = src->s.uvlinesize;
2426     dst->s.first_field          = src->s.first_field;
2427
2428     dst->prev_poc_msb           = src->prev_poc_msb;
2429     dst->prev_poc_lsb           = src->prev_poc_lsb;
2430     dst->prev_frame_num_offset  = src->prev_frame_num_offset;
2431     dst->prev_frame_num         = src->prev_frame_num;
2432     dst->short_ref_count        = src->short_ref_count;
2433
2434     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
2435     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
2436     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
2437     memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
2438
2439     memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
2440     memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
2441 }
2442
2443 /**
2444  * computes profile from profile_idc and constraint_set?_flags
2445  *
2446  * @param sps SPS
2447  *
2448  * @return profile as defined by FF_PROFILE_H264_*
2449  */
2450 int ff_h264_get_profile(SPS *sps)
2451 {
2452     int profile = sps->profile_idc;
2453
2454     switch(sps->profile_idc) {
2455     case FF_PROFILE_H264_BASELINE:
2456         // constraint_set1_flag set to 1
2457         profile |= (sps->constraint_set_flags & 1<<1) ? FF_PROFILE_H264_CONSTRAINED : 0;
2458         break;
2459     case FF_PROFILE_H264_HIGH_10:
2460     case FF_PROFILE_H264_HIGH_422:
2461     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
2462         // constraint_set3_flag set to 1
2463         profile |= (sps->constraint_set_flags & 1<<3) ? FF_PROFILE_H264_INTRA : 0;
2464         break;
2465     }
2466
2467     return profile;
2468 }
2469
2470 /**
2471  * decodes a slice header.
2472  * This will also call MPV_common_init() and frame_start() as needed.
2473  *
2474  * @param h h264context
2475  * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
2476  *
2477  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
2478  */
2479 static int decode_slice_header(H264Context *h, H264Context *h0){
2480     MpegEncContext * const s = &h->s;
2481     MpegEncContext * const s0 = &h0->s;
2482     unsigned int first_mb_in_slice;
2483     unsigned int pps_id;
2484     int num_ref_idx_active_override_flag;
2485     unsigned int slice_type, tmp, i, j;
2486     int default_ref_list_done = 0;
2487     int last_pic_structure;
2488
2489     s->dropable= h->nal_ref_idc == 0;
2490
2491     /* FIXME: 2tap qpel isn't implemented for high bit depth. */
2492     if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc && !h->pixel_shift){
2493         s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
2494         s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
2495     }else{
2496         s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
2497         s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
2498     }
2499
2500     first_mb_in_slice= get_ue_golomb(&s->gb);
2501
2502     if(first_mb_in_slice == 0){ //FIXME better field boundary detection
2503         if(h0->current_slice && FIELD_PICTURE){
2504             field_end(h, 1);
2505         }
2506
2507         h0->current_slice = 0;
2508         if (!s0->first_field)
2509             s->current_picture_ptr= NULL;
2510     }
2511
2512     slice_type= get_ue_golomb_31(&s->gb);
2513     if(slice_type > 9){
2514         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);
2515         return -1;
2516     }
2517     if(slice_type > 4){
2518         slice_type -= 5;
2519         h->slice_type_fixed=1;
2520     }else
2521         h->slice_type_fixed=0;
2522
2523     slice_type= golomb_to_pict_type[ slice_type ];
2524     if (slice_type == AV_PICTURE_TYPE_I
2525         || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
2526         default_ref_list_done = 1;
2527     }
2528     h->slice_type= slice_type;
2529     h->slice_type_nos= slice_type & 3;
2530
2531     s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
2532
2533     pps_id= get_ue_golomb(&s->gb);
2534     if(pps_id>=MAX_PPS_COUNT){
2535         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
2536         return -1;
2537     }
2538     if(!h0->pps_buffers[pps_id]) {
2539         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
2540         return -1;
2541     }
2542     h->pps= *h0->pps_buffers[pps_id];
2543
2544     if(!h0->sps_buffers[h->pps.sps_id]) {
2545         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
2546         return -1;
2547     }
2548     h->sps = *h0->sps_buffers[h->pps.sps_id];
2549
2550     s->avctx->profile = ff_h264_get_profile(&h->sps);
2551     s->avctx->level   = h->sps.level_idc;
2552     s->avctx->refs    = h->sps.ref_frame_count;
2553
2554     if(h == h0 && h->dequant_coeff_pps != pps_id){
2555         h->dequant_coeff_pps = pps_id;
2556         init_dequant_tables(h);
2557     }
2558
2559     s->mb_width= h->sps.mb_width;
2560     s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
2561
2562     h->b_stride=  s->mb_width*4;
2563
2564     s->width = 16*s->mb_width - (2>>CHROMA444)*FFMIN(h->sps.crop_right, (8<<CHROMA444)-1);
2565     if(h->sps.frame_mbs_only_flag)
2566         s->height= 16*s->mb_height - (2>>CHROMA444)*FFMIN(h->sps.crop_bottom, (8<<CHROMA444)-1);
2567     else
2568         s->height= 16*s->mb_height - (4>>CHROMA444)*FFMIN(h->sps.crop_bottom, (8<<CHROMA444)-1);
2569
2570     if (s->context_initialized
2571         && (   s->width != s->avctx->width || s->height != s->avctx->height
2572             || av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
2573         if(h != h0) {
2574             av_log_missing_feature(s->avctx, "Width/height changing with threads is", 0);
2575             return -1;   // width / height changed during parallelized decoding
2576         }
2577         free_tables(h, 0);
2578         flush_dpb(s->avctx);
2579         MPV_common_end(s);
2580     }
2581     if (!s->context_initialized) {
2582         if (h != h0) {
2583             av_log(h->s.avctx, AV_LOG_ERROR, "Cannot (re-)initialize context during parallel decoding.\n");
2584             return -1;
2585         }
2586
2587         avcodec_set_dimensions(s->avctx, s->width, s->height);
2588         s->avctx->sample_aspect_ratio= h->sps.sar;
2589         av_assert0(s->avctx->sample_aspect_ratio.den);
2590
2591         h->s.avctx->coded_width = 16*s->mb_width;
2592         h->s.avctx->coded_height = 16*s->mb_height;
2593
2594         if(h->sps.video_signal_type_present_flag){
2595             s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
2596             if(h->sps.colour_description_present_flag){
2597                 s->avctx->color_primaries = h->sps.color_primaries;
2598                 s->avctx->color_trc       = h->sps.color_trc;
2599                 s->avctx->colorspace      = h->sps.colorspace;
2600             }
2601         }
2602
2603         if(h->sps.timing_info_present_flag){
2604             int64_t den= h->sps.time_scale;
2605             if(h->x264_build < 44U)
2606                 den *= 2;
2607             av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
2608                       h->sps.num_units_in_tick, den, 1<<30);
2609         }
2610
2611         switch (h->sps.bit_depth_luma) {
2612             case 9 :
2613                 s->avctx->pix_fmt = CHROMA444 ? PIX_FMT_YUV444P9 : PIX_FMT_YUV420P9;
2614                 break;
2615             case 10 :
2616                 s->avctx->pix_fmt = CHROMA444 ? PIX_FMT_YUV444P10 : PIX_FMT_YUV420P10;
2617                 break;
2618             default:
2619                 if (CHROMA444){
2620                     s->avctx->pix_fmt = s->avctx->color_range == AVCOL_RANGE_JPEG ? PIX_FMT_YUVJ444P : PIX_FMT_YUV444P;
2621                 }else{
2622                     s->avctx->pix_fmt = s->avctx->get_format(s->avctx,
2623                                                              s->avctx->codec->pix_fmts ?
2624                                                              s->avctx->codec->pix_fmts :
2625                                                              s->avctx->color_range == AVCOL_RANGE_JPEG ?
2626                                                              hwaccel_pixfmt_list_h264_jpeg_420 :
2627                                                              ff_hwaccel_pixfmt_list_420);
2628                 }
2629         }
2630
2631         s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
2632
2633         if (MPV_common_init(s) < 0) {
2634             av_log(h->s.avctx, AV_LOG_ERROR, "MPV_common_init() failed.\n");
2635             return -1;
2636         }
2637         s->first_field = 0;
2638         h->prev_interlaced_frame = 1;
2639
2640         init_scan_tables(h);
2641         ff_h264_alloc_tables(h);
2642
2643         if (!HAVE_THREADS || !(s->avctx->active_thread_type&FF_THREAD_SLICE)) {
2644             if (context_init(h) < 0) {
2645                 av_log(h->s.avctx, AV_LOG_ERROR, "context_init() failed.\n");
2646                 return -1;
2647             }
2648         } else {
2649             for(i = 1; i < s->avctx->thread_count; i++) {
2650                 H264Context *c;
2651                 c = h->thread_context[i] = av_malloc(sizeof(H264Context));
2652                 memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
2653                 memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
2654                 c->h264dsp = h->h264dsp;
2655                 c->sps = h->sps;
2656                 c->pps = h->pps;
2657                 c->pixel_shift = h->pixel_shift;
2658                 init_scan_tables(c);
2659                 clone_tables(c, h, i);
2660             }
2661
2662             for(i = 0; i < s->avctx->thread_count; i++)
2663                 if (context_init(h->thread_context[i]) < 0) {
2664                     av_log(h->s.avctx, AV_LOG_ERROR, "context_init() failed.\n");
2665                     return -1;
2666                 }
2667         }
2668     }
2669
2670     h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
2671
2672     h->mb_mbaff = 0;
2673     h->mb_aff_frame = 0;
2674     last_pic_structure = s0->picture_structure;
2675     if(h->sps.frame_mbs_only_flag){
2676         s->picture_structure= PICT_FRAME;
2677     }else{
2678         if(get_bits1(&s->gb)) { //field_pic_flag
2679             s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
2680         } else {
2681             s->picture_structure= PICT_FRAME;
2682             h->mb_aff_frame = h->sps.mb_aff;
2683         }
2684     }
2685     h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
2686
2687     if(h0->current_slice == 0){
2688         // Shorten frame num gaps so we don't have to allocate reference frames just to throw them away
2689         if(h->frame_num != h->prev_frame_num) {
2690             int unwrap_prev_frame_num = h->prev_frame_num, max_frame_num = 1<<h->sps.log2_max_frame_num;
2691
2692             if (unwrap_prev_frame_num > h->frame_num) unwrap_prev_frame_num -= max_frame_num;
2693
2694             if ((h->frame_num - unwrap_prev_frame_num) > h->sps.ref_frame_count) {
2695                 unwrap_prev_frame_num = (h->frame_num - h->sps.ref_frame_count) - 1;
2696                 if (unwrap_prev_frame_num < 0)
2697                     unwrap_prev_frame_num += max_frame_num;
2698
2699                 h->prev_frame_num = unwrap_prev_frame_num;
2700             }
2701         }
2702
2703         while(h->frame_num !=  h->prev_frame_num &&
2704               h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
2705             Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
2706             av_log(h->s.avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
2707             if (ff_h264_frame_start(h) < 0)
2708                 return -1;
2709             h->prev_frame_num++;
2710             h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
2711             s->current_picture_ptr->frame_num= h->prev_frame_num;
2712             ff_thread_report_progress((AVFrame*)s->current_picture_ptr, INT_MAX, 0);
2713             ff_thread_report_progress((AVFrame*)s->current_picture_ptr, INT_MAX, 1);
2714             ff_generate_sliding_window_mmcos(h);
2715             ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
2716             /* Error concealment: if a ref is missing, copy the previous ref in its place.
2717              * FIXME: avoiding a memcpy would be nice, but ref handling makes many assumptions
2718              * about there being no actual duplicates.
2719              * FIXME: this doesn't copy padding for out-of-frame motion vectors.  Given we're
2720              * concealing a lost frame, this probably isn't noticable by comparison, but it should
2721              * be fixed. */
2722             if (h->short_ref_count) {
2723                 if (prev) {
2724                     av_image_copy(h->short_ref[0]->data, h->short_ref[0]->linesize,
2725                                   (const uint8_t**)prev->data, prev->linesize,
2726                                   s->avctx->pix_fmt, s->mb_width*16, s->mb_height*16);
2727                     h->short_ref[0]->poc = prev->poc+2;
2728                 }
2729                 h->short_ref[0]->frame_num = h->prev_frame_num;
2730             }
2731         }
2732
2733         /* See if we have a decoded first field looking for a pair... */
2734         if (s0->first_field) {
2735             assert(s0->current_picture_ptr);
2736             assert(s0->current_picture_ptr->data[0]);
2737             assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
2738
2739             /* figure out if we have a complementary field pair */
2740             if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
2741                 /*
2742                  * Previous field is unmatched. Don't display it, but let it
2743                  * remain for reference if marked as such.
2744                  */
2745                 s0->current_picture_ptr = NULL;
2746                 s0->first_field = FIELD_PICTURE;
2747
2748             } else {
2749                 if (h->nal_ref_idc &&
2750                         s0->current_picture_ptr->reference &&
2751                         s0->current_picture_ptr->frame_num != h->frame_num) {
2752                     /*
2753                      * This and previous field were reference, but had
2754                      * different frame_nums. Consider this field first in
2755                      * pair. Throw away previous field except for reference
2756                      * purposes.
2757                      */
2758                     s0->first_field = 1;
2759                     s0->current_picture_ptr = NULL;
2760
2761                 } else {
2762                     /* Second field in complementary pair */
2763                     s0->first_field = 0;
2764                 }
2765             }
2766
2767         } else {
2768             /* Frame or first field in a potentially complementary pair */
2769             assert(!s0->current_picture_ptr);
2770             s0->first_field = FIELD_PICTURE;
2771         }
2772
2773         if(!FIELD_PICTURE || s0->first_field) {
2774             if (ff_h264_frame_start(h) < 0) {
2775                 s0->first_field = 0;
2776                 return -1;
2777             }
2778         } else {
2779             ff_release_unused_pictures(s, 0);
2780         }
2781     }
2782     if(h != h0)
2783         clone_slice(h, h0);
2784
2785     s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
2786
2787     assert(s->mb_num == s->mb_width * s->mb_height);
2788     if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
2789        first_mb_in_slice                    >= s->mb_num){
2790         av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
2791         return -1;
2792     }
2793     s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
2794     s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
2795     if (s->picture_structure == PICT_BOTTOM_FIELD)
2796         s->resync_mb_y = s->mb_y = s->mb_y + 1;
2797     assert(s->mb_y < s->mb_height);
2798
2799     if(s->picture_structure==PICT_FRAME){
2800         h->curr_pic_num=   h->frame_num;
2801         h->max_pic_num= 1<< h->sps.log2_max_frame_num;
2802     }else{
2803         h->curr_pic_num= 2*h->frame_num + 1;
2804         h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
2805     }
2806
2807     if(h->nal_unit_type == NAL_IDR_SLICE){
2808         get_ue_golomb(&s->gb); /* idr_pic_id */
2809     }
2810
2811     if(h->sps.poc_type==0){
2812         h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
2813
2814         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
2815             h->delta_poc_bottom= get_se_golomb(&s->gb);
2816         }
2817     }
2818
2819     if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
2820         h->delta_poc[0]= get_se_golomb(&s->gb);
2821
2822         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
2823             h->delta_poc[1]= get_se_golomb(&s->gb);
2824     }
2825
2826     init_poc(h);
2827
2828     if(h->pps.redundant_pic_cnt_present){
2829         h->redundant_pic_count= get_ue_golomb(&s->gb);
2830     }
2831
2832     //set defaults, might be overridden a few lines later
2833     h->ref_count[0]= h->pps.ref_count[0];
2834     h->ref_count[1]= h->pps.ref_count[1];
2835
2836     if(h->slice_type_nos != AV_PICTURE_TYPE_I){
2837         if(h->slice_type_nos == AV_PICTURE_TYPE_B){
2838             h->direct_spatial_mv_pred= get_bits1(&s->gb);
2839         }
2840         num_ref_idx_active_override_flag= get_bits1(&s->gb);
2841
2842         if(num_ref_idx_active_override_flag){
2843             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
2844             if(h->slice_type_nos==AV_PICTURE_TYPE_B)
2845                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
2846
2847             if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
2848                 av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
2849                 h->ref_count[0]= h->ref_count[1]= 1;
2850                 return -1;
2851             }
2852         }
2853         if(h->slice_type_nos == AV_PICTURE_TYPE_B)
2854             h->list_count= 2;
2855         else
2856             h->list_count= 1;
2857     }else
2858         h->list_count= 0;
2859
2860     if(!default_ref_list_done){
2861         ff_h264_fill_default_ref_list(h);
2862     }
2863
2864     if(h->slice_type_nos!=AV_PICTURE_TYPE_I && ff_h264_decode_ref_pic_list_reordering(h) < 0)
2865         return -1;
2866
2867     if(h->slice_type_nos!=AV_PICTURE_TYPE_I){
2868         s->last_picture_ptr= &h->ref_list[0][0];
2869         ff_copy_picture(&s->last_picture, s->last_picture_ptr);
2870     }
2871     if(h->slice_type_nos==AV_PICTURE_TYPE_B){
2872         s->next_picture_ptr= &h->ref_list[1][0];
2873         ff_copy_picture(&s->next_picture, s->next_picture_ptr);
2874     }
2875
2876     if(   (h->pps.weighted_pred          && h->slice_type_nos == AV_PICTURE_TYPE_P )
2877        ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== AV_PICTURE_TYPE_B ) )
2878         pred_weight_table(h);
2879     else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== AV_PICTURE_TYPE_B){
2880         implicit_weight_table(h, -1);
2881     }else {
2882         h->use_weight = 0;
2883         for (i = 0; i < 2; i++) {
2884             h->luma_weight_flag[i]   = 0;
2885             h->chroma_weight_flag[i] = 0;
2886         }
2887     }
2888
2889     if(h->nal_ref_idc)
2890         ff_h264_decode_ref_pic_marking(h0, &s->gb);
2891
2892     if(FRAME_MBAFF){
2893         ff_h264_fill_mbaff_ref_list(h);
2894
2895         if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== AV_PICTURE_TYPE_B){
2896             implicit_weight_table(h, 0);
2897             implicit_weight_table(h, 1);
2898         }
2899     }
2900
2901     if(h->slice_type_nos==AV_PICTURE_TYPE_B && !h->direct_spatial_mv_pred)
2902         ff_h264_direct_dist_scale_factor(h);
2903     ff_h264_direct_ref_list_init(h);
2904
2905     if( h->slice_type_nos != AV_PICTURE_TYPE_I && h->pps.cabac ){
2906         tmp = get_ue_golomb_31(&s->gb);
2907         if(tmp > 2){
2908             av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
2909             return -1;
2910         }
2911         h->cabac_init_idc= tmp;
2912     }
2913
2914     h->last_qscale_diff = 0;
2915     tmp = h->pps.init_qp + get_se_golomb(&s->gb);
2916     if(tmp>51+6*(h->sps.bit_depth_luma-8)){
2917         av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
2918         return -1;
2919     }
2920     s->qscale= tmp;
2921     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2922     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2923     //FIXME qscale / qp ... stuff
2924     if(h->slice_type == AV_PICTURE_TYPE_SP){
2925         get_bits1(&s->gb); /* sp_for_switch_flag */
2926     }
2927     if(h->slice_type==AV_PICTURE_TYPE_SP || h->slice_type == AV_PICTURE_TYPE_SI){
2928         get_se_golomb(&s->gb); /* slice_qs_delta */
2929     }
2930
2931     h->deblocking_filter = 1;
2932     h->slice_alpha_c0_offset = 52;
2933     h->slice_beta_offset = 52;
2934     if( h->pps.deblocking_filter_parameters_present ) {
2935         tmp= get_ue_golomb_31(&s->gb);
2936         if(tmp > 2){
2937             av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
2938             return -1;
2939         }
2940         h->deblocking_filter= tmp;
2941         if(h->deblocking_filter < 2)
2942             h->deblocking_filter^= 1; // 1<->0
2943
2944         if( h->deblocking_filter ) {
2945             h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
2946             h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
2947             if(   h->slice_alpha_c0_offset > 104U
2948                || h->slice_beta_offset     > 104U){
2949                 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);
2950                 return -1;
2951             }
2952         }
2953     }
2954
2955     if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
2956        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != AV_PICTURE_TYPE_I)
2957        ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == AV_PICTURE_TYPE_B)
2958        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2959         h->deblocking_filter= 0;
2960
2961     if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
2962         if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
2963             /* Cheat slightly for speed:
2964                Do not bother to deblock across slices. */
2965             h->deblocking_filter = 2;
2966         } else {
2967             h0->max_contexts = 1;
2968             if(!h0->single_decode_warning) {
2969                 av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
2970                 h0->single_decode_warning = 1;
2971             }
2972             if (h != h0) {
2973                 av_log(h->s.avctx, AV_LOG_ERROR, "Deblocking switched inside frame.\n");
2974                 return 1;
2975             }
2976         }
2977     }
2978     h->qp_thresh= 15 + 52 - FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset) - FFMAX3(0, h->pps.chroma_qp_index_offset[0], h->pps.chroma_qp_index_offset[1]);
2979
2980 #if 0 //FMO
2981     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
2982         slice_group_change_cycle= get_bits(&s->gb, ?);
2983 #endif
2984
2985     h0->last_slice_type = slice_type;
2986     h->slice_num = ++h0->current_slice;
2987     if(h->slice_num >= MAX_SLICES){
2988         av_log(s->avctx, AV_LOG_ERROR, "Too many slices (%d >= %d), increase MAX_SLICES and recompile\n", h->slice_num, MAX_SLICES);
2989     }
2990
2991     for(j=0; j<2; j++){
2992         int id_list[16];
2993         int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
2994         for(i=0; i<16; i++){
2995             id_list[i]= 60;
2996             if(h->ref_list[j][i].data[0]){
2997                 int k;
2998                 uint8_t *base= h->ref_list[j][i].base[0];
2999                 for(k=0; k<h->short_ref_count; k++)
3000                     if(h->short_ref[k]->base[0] == base){
3001                         id_list[i]= k;
3002                         break;
3003                     }
3004                 for(k=0; k<h->long_ref_count; k++)
3005                     if(h->long_ref[k] && h->long_ref[k]->base[0] == base){
3006                         id_list[i]= h->short_ref_count + k;
3007                         break;
3008                     }
3009             }
3010         }
3011
3012         ref2frm[0]=
3013         ref2frm[1]= -1;
3014         for(i=0; i<16; i++)
3015             ref2frm[i+2]= 4*id_list[i]
3016                           +(h->ref_list[j][i].reference&3);
3017         ref2frm[18+0]=
3018         ref2frm[18+1]= -1;
3019         for(i=16; i<48; i++)
3020             ref2frm[i+4]= 4*id_list[(i-16)>>1]
3021                           +(h->ref_list[j][i].reference&3);
3022     }
3023
3024     //FIXME: fix draw_edges+PAFF+frame threads
3025     h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE || (!h->sps.frame_mbs_only_flag && s->avctx->active_thread_type)) ? 0 : 16;
3026     h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
3027
3028     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
3029         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",
3030                h->slice_num,
3031                (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
3032                first_mb_in_slice,
3033                av_get_picture_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
3034                pps_id, h->frame_num,
3035                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
3036                h->ref_count[0], h->ref_count[1],
3037                s->qscale,
3038                h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
3039                h->use_weight,
3040                h->use_weight==1 && h->use_weight_chroma ? "c" : "",
3041                h->slice_type == AV_PICTURE_TYPE_B ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
3042                );
3043     }
3044
3045     return 0;
3046 }
3047
3048 int ff_h264_get_slice_type(const H264Context *h)
3049 {
3050     switch (h->slice_type) {
3051     case AV_PICTURE_TYPE_P:  return 0;
3052     case AV_PICTURE_TYPE_B:  return 1;
3053     case AV_PICTURE_TYPE_I:  return 2;
3054     case AV_PICTURE_TYPE_SP: return 3;
3055     case AV_PICTURE_TYPE_SI: return 4;
3056     default:         return -1;
3057     }
3058 }
3059
3060 /**
3061  *
3062  * @return non zero if the loop filter can be skiped
3063  */
3064 static int fill_filter_caches(H264Context *h, int mb_type){
3065     MpegEncContext * const s = &h->s;
3066     const int mb_xy= h->mb_xy;
3067     int top_xy, left_xy[2];
3068     int top_type, left_type[2];
3069
3070     top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
3071
3072     //FIXME deblocking could skip the intra and nnz parts.
3073
3074     /* Wow, what a mess, why didn't they simplify the interlacing & intra
3075      * stuff, I can't imagine that these complex rules are worth it. */
3076
3077     left_xy[1] = left_xy[0] = mb_xy-1;
3078     if(FRAME_MBAFF){
3079         const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
3080         const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
3081         if(s->mb_y&1){
3082             if (left_mb_field_flag != curr_mb_field_flag) {
3083                 left_xy[0] -= s->mb_stride;
3084             }
3085         }else{
3086             if(curr_mb_field_flag){
3087                 top_xy      += s->mb_stride & (((s->current_picture.mb_type[top_xy    ]>>7)&1)-1);
3088             }
3089             if (left_mb_field_flag != curr_mb_field_flag) {
3090                 left_xy[1] += s->mb_stride;
3091             }
3092         }
3093     }
3094
3095     h->top_mb_xy = top_xy;
3096     h->left_mb_xy[0] = left_xy[0];
3097     h->left_mb_xy[1] = left_xy[1];
3098     {
3099         //for sufficiently low qp, filtering wouldn't do anything
3100         //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
3101         int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
3102         int qp = s->current_picture.qscale_table[mb_xy];
3103         if(qp <= qp_thresh
3104            && (left_xy[0]<0 || ((qp + s->current_picture.qscale_table[left_xy[0]] + 1)>>1) <= qp_thresh)
3105            && (top_xy   < 0 || ((qp + s->current_picture.qscale_table[top_xy    ] + 1)>>1) <= qp_thresh)){
3106             if(!FRAME_MBAFF)
3107                 return 1;
3108             if(   (left_xy[0]< 0            || ((qp + s->current_picture.qscale_table[left_xy[1]             ] + 1)>>1) <= qp_thresh)
3109                && (top_xy    < s->mb_stride || ((qp + s->current_picture.qscale_table[top_xy    -s->mb_stride] + 1)>>1) <= qp_thresh))
3110                 return 1;
3111         }
3112     }
3113
3114     top_type     = s->current_picture.mb_type[top_xy]    ;
3115     left_type[0] = s->current_picture.mb_type[left_xy[0]];
3116     left_type[1] = s->current_picture.mb_type[left_xy[1]];
3117     if(h->deblocking_filter == 2){
3118         if(h->slice_table[top_xy     ] != h->slice_num) top_type= 0;
3119         if(h->slice_table[left_xy[0] ] != h->slice_num) left_type[0]= left_type[1]= 0;
3120     }else{
3121         if(h->slice_table[top_xy     ] == 0xFFFF) top_type= 0;
3122         if(h->slice_table[left_xy[0] ] == 0xFFFF) left_type[0]= left_type[1] =0;
3123     }
3124     h->top_type    = top_type    ;
3125     h->left_type[0]= left_type[0];
3126     h->left_type[1]= left_type[1];
3127
3128     if(IS_INTRA(mb_type))
3129         return 0;
3130
3131     AV_COPY32(&h->non_zero_count_cache[4+8* 1], &h->non_zero_count[mb_xy][ 0]);
3132     AV_COPY32(&h->non_zero_count_cache[4+8* 2], &h->non_zero_count[mb_xy][ 4]);
3133     AV_COPY32(&h->non_zero_count_cache[4+8* 3], &h->non_zero_count[mb_xy][ 8]);
3134     AV_COPY32(&h->non_zero_count_cache[4+8* 4], &h->non_zero_count[mb_xy][12]);
3135
3136     h->cbp= h->cbp_table[mb_xy];
3137
3138     {
3139         int list;
3140         for(list=0; list<h->list_count; list++){
3141             int8_t *ref;
3142             int y, b_stride;
3143             int16_t (*mv_dst)[2];
3144             int16_t (*mv_src)[2];
3145
3146             if(!USES_LIST(mb_type, list)){
3147                 fill_rectangle(  h->mv_cache[list][scan8[0]], 4, 4, 8, pack16to32(0,0), 4);
3148                 AV_WN32A(&h->ref_cache[list][scan8[ 0]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3149                 AV_WN32A(&h->ref_cache[list][scan8[ 2]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3150                 AV_WN32A(&h->ref_cache[list][scan8[ 8]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3151                 AV_WN32A(&h->ref_cache[list][scan8[10]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3152                 continue;
3153             }
3154
3155             ref = &s->current_picture.ref_index[list][4*mb_xy];
3156             {
3157                 int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
3158                 AV_WN32A(&h->ref_cache[list][scan8[ 0]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
3159                 AV_WN32A(&h->ref_cache[list][scan8[ 2]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
3160                 ref += 2;
3161                 AV_WN32A(&h->ref_cache[list][scan8[ 8]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
3162                 AV_WN32A(&h->ref_cache[list][scan8[10]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
3163             }
3164
3165             b_stride = h->b_stride;
3166             mv_dst   = &h->mv_cache[list][scan8[0]];
3167             mv_src   = &s->current_picture.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
3168             for(y=0; y<4; y++){
3169                 AV_COPY128(mv_dst + 8*y, mv_src + y*b_stride);
3170             }
3171
3172         }
3173     }
3174
3175
3176 /*
3177 0 . T T. T T T T
3178 1 L . .L . . . .
3179 2 L . .L . . . .
3180 3 . T TL . . . .
3181 4 L . .L . . . .
3182 5 L . .. . . . .
3183 */
3184 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
3185     if(top_type){
3186         AV_COPY32(&h->non_zero_count_cache[4+8*0], &h->non_zero_count[top_xy][3*4]);
3187     }
3188
3189     if(left_type[0]){
3190         h->non_zero_count_cache[3+8*1]= h->non_zero_count[left_xy[0]][3+0*4];
3191         h->non_zero_count_cache[3+8*2]= h->non_zero_count[left_xy[0]][3+1*4];
3192         h->non_zero_count_cache[3+8*3]= h->non_zero_count[left_xy[0]][3+2*4];
3193         h->non_zero_count_cache[3+8*4]= h->non_zero_count[left_xy[0]][3+3*4];
3194     }
3195
3196     // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
3197     if(!CABAC && h->pps.transform_8x8_mode){
3198         if(IS_8x8DCT(top_type)){
3199             h->non_zero_count_cache[4+8*0]=
3200             h->non_zero_count_cache[5+8*0]= (h->cbp_table[top_xy] & 0x4000) >> 12;
3201             h->non_zero_count_cache[6+8*0]=
3202             h->non_zero_count_cache[7+8*0]= (h->cbp_table[top_xy] & 0x8000) >> 12;
3203         }
3204         if(IS_8x8DCT(left_type[0])){
3205             h->non_zero_count_cache[3+8*1]=
3206             h->non_zero_count_cache[3+8*2]= (h->cbp_table[left_xy[0]]&0x2000) >> 12; //FIXME check MBAFF
3207         }
3208         if(IS_8x8DCT(left_type[1])){
3209             h->non_zero_count_cache[3+8*3]=
3210             h->non_zero_count_cache[3+8*4]= (h->cbp_table[left_xy[1]]&0x8000) >> 12; //FIXME check MBAFF
3211         }
3212
3213         if(IS_8x8DCT(mb_type)){
3214             h->non_zero_count_cache[scan8[0   ]]= h->non_zero_count_cache[scan8[1   ]]=
3215             h->non_zero_count_cache[scan8[2   ]]= h->non_zero_count_cache[scan8[3   ]]= (h->cbp & 0x1000) >> 12;
3216
3217             h->non_zero_count_cache[scan8[0+ 4]]= h->non_zero_count_cache[scan8[1+ 4]]=
3218             h->non_zero_count_cache[scan8[2+ 4]]= h->non_zero_count_cache[scan8[3+ 4]]= (h->cbp & 0x2000) >> 12;
3219
3220             h->non_zero_count_cache[scan8[0+ 8]]= h->non_zero_count_cache[scan8[1+ 8]]=
3221             h->non_zero_count_cache[scan8[2+ 8]]= h->non_zero_count_cache[scan8[3+ 8]]= (h->cbp & 0x4000) >> 12;
3222
3223             h->non_zero_count_cache[scan8[0+12]]= h->non_zero_count_cache[scan8[1+12]]=
3224             h->non_zero_count_cache[scan8[2+12]]= h->non_zero_count_cache[scan8[3+12]]= (h->cbp & 0x8000) >> 12;
3225         }
3226     }
3227
3228     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
3229         int list;
3230         for(list=0; list<h->list_count; list++){
3231             if(USES_LIST(top_type, list)){
3232                 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
3233                 const int b8_xy= 4*top_xy + 2;
3234                 int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
3235                 AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
3236                 h->ref_cache[list][scan8[0] + 0 - 1*8]=
3237                 h->ref_cache[list][scan8[0] + 1 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 0]];
3238                 h->ref_cache[list][scan8[0] + 2 - 1*8]=
3239                 h->ref_cache[list][scan8[0] + 3 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 1]];
3240             }else{
3241                 AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
3242                 AV_WN32A(&h->ref_cache[list][scan8[0] + 0 - 1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
3243             }
3244
3245             if(!IS_INTERLACED(mb_type^left_type[0])){
3246                 if(USES_LIST(left_type[0], list)){
3247                     const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
3248                     const int b8_xy= 4*left_xy[0] + 1;
3249                     int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[0]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
3250                     AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 0 ], s->current_picture.motion_val[list][b_xy + h->b_stride*0]);
3251                     AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 8 ], s->current_picture.motion_val[list][b_xy + h->b_stride*1]);
3252                     AV_COPY32(h->mv_cache[list][scan8[0] - 1 +16 ], s->current_picture.motion_val[list][b_xy + h->b_stride*2]);
3253                     AV_COPY32(h->mv_cache[list][scan8[0] - 1 +24 ], s->current_picture.motion_val[list][b_xy + h->b_stride*3]);
3254                     h->ref_cache[list][scan8[0] - 1 + 0 ]=
3255                     h->ref_cache[list][scan8[0] - 1 + 8 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*0]];
3256                     h->ref_cache[list][scan8[0] - 1 +16 ]=
3257                     h->ref_cache[list][scan8[0] - 1 +24 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*1]];
3258                 }else{
3259                     AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 0 ]);
3260                     AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 8 ]);
3261                     AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +16 ]);
3262                     AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +24 ]);
3263                     h->ref_cache[list][scan8[0] - 1 + 0  ]=
3264                     h->ref_cache[list][scan8[0] - 1 + 8  ]=
3265                     h->ref_cache[list][scan8[0] - 1 + 16 ]=
3266                     h->ref_cache[list][scan8[0] - 1 + 24 ]= LIST_NOT_USED;
3267                 }
3268             }
3269         }
3270     }
3271
3272     return 0;
3273 }
3274
3275 static void loop_filter(H264Context *h, int start_x, int end_x){
3276     MpegEncContext * const s = &h->s;
3277     uint8_t  *dest_y, *dest_cb, *dest_cr;
3278     int linesize, uvlinesize, mb_x, mb_y;
3279     const int end_mb_y= s->mb_y + FRAME_MBAFF;
3280     const int old_slice_type= h->slice_type;
3281     const int pixel_shift = h->pixel_shift;
3282
3283     if(h->deblocking_filter) {
3284         for(mb_x= start_x; mb_x<end_x; mb_x++){
3285             for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
3286                 int mb_xy, mb_type;
3287                 mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
3288                 h->slice_num= h->slice_table[mb_xy];
3289                 mb_type= s->current_picture.mb_type[mb_xy];
3290                 h->list_count= h->list_counts[mb_xy];
3291
3292                 if(FRAME_MBAFF)
3293                     h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
3294
3295                 s->mb_x= mb_x;
3296                 s->mb_y= mb_y;
3297                 dest_y  = s->current_picture.data[0] + ((mb_x << pixel_shift) + mb_y * s->linesize  ) * 16;
3298                 dest_cb = s->current_picture.data[1] + ((mb_x << pixel_shift) + mb_y * s->uvlinesize) * (8 << CHROMA444);
3299                 dest_cr = s->current_picture.data[2] + ((mb_x << pixel_shift) + mb_y * s->uvlinesize) * (8 << CHROMA444);
3300                     //FIXME simplify above
3301
3302                 if (MB_FIELD) {
3303                     linesize   = h->mb_linesize   = s->linesize * 2;
3304                     uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
3305                     if(mb_y&1){ //FIXME move out of this function?
3306                         dest_y -= s->linesize*15;
3307                         dest_cb-= s->uvlinesize*((8 << CHROMA444)-1);
3308                         dest_cr-= s->uvlinesize*((8 << CHROMA444)-1);
3309                     }
3310                 } else {
3311                     linesize   = h->mb_linesize   = s->linesize;
3312                     uvlinesize = h->mb_uvlinesize = s->uvlinesize;
3313                 }
3314                 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, CHROMA444, 0);
3315                 if(fill_filter_caches(h, mb_type))
3316                     continue;
3317                 h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
3318                 h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
3319
3320                 if (FRAME_MBAFF) {
3321                     ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
3322                 } else {
3323                     ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
3324                 }
3325             }
3326         }
3327     }
3328     h->slice_type= old_slice_type;
3329     s->mb_x= end_x;
3330     s->mb_y= end_mb_y - FRAME_MBAFF;
3331     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3332     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3333 }
3334
3335 static void predict_field_decoding_flag(H264Context *h){
3336     MpegEncContext * const s = &h->s;
3337     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
3338     int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
3339                 ? s->current_picture.mb_type[mb_xy-1]
3340                 : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
3341                 ? s->current_picture.mb_type[mb_xy-s->mb_stride]
3342                 : 0;
3343     h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
3344 }
3345
3346 /**
3347  * Draw edges and report progress for the last MB row.
3348  */
3349 static void decode_finish_row(H264Context *h){
3350     MpegEncContext * const s = &h->s;
3351     int top = 16*(s->mb_y >> FIELD_PICTURE);
3352     int height = 16 << FRAME_MBAFF;
3353     int deblock_border = (16 + 4) << FRAME_MBAFF;
3354     int pic_height = 16*s->mb_height >> FIELD_PICTURE;
3355
3356     if (h->deblocking_filter) {
3357         if((top + height) >= pic_height)
3358             height += deblock_border;
3359
3360         top -= deblock_border;
3361     }
3362
3363     if (top >= pic_height || (top + height) < h->emu_edge_height)
3364         return;
3365
3366     height = FFMIN(height, pic_height - top);
3367     if (top < h->emu_edge_height) {
3368         height = top+height;
3369         top = 0;
3370     }
3371
3372     ff_draw_horiz_band(s, top, height);
3373
3374     if (s->dropable) return;
3375
3376     ff_thread_report_progress((AVFrame*)s->current_picture_ptr, top + height - 1,
3377                              s->picture_structure==PICT_BOTTOM_FIELD);
3378 }
3379
3380 static int decode_slice(struct AVCodecContext *avctx, void *arg){
3381     H264Context *h = *(void**)arg;
3382     MpegEncContext * const s = &h->s;
3383     const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
3384     int lf_x_start = s->mb_x;
3385
3386     s->mb_skip_run= -1;
3387
3388     h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
3389                     (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
3390
3391     if( h->pps.cabac ) {
3392         /* realign */
3393         align_get_bits( &s->gb );
3394
3395         /* init cabac */
3396         ff_init_cabac_states( &h->cabac);
3397         ff_init_cabac_decoder( &h->cabac,
3398                                s->gb.buffer + get_bits_count(&s->gb)/8,
3399                                (get_bits_left(&s->gb) + 7)/8);
3400
3401         ff_h264_init_cabac_states(h);
3402
3403         for(;;){
3404 //START_TIMER
3405             int ret = ff_h264_decode_mb_cabac(h);
3406             int eos;
3407 //STOP_TIMER("decode_mb_cabac")
3408
3409             if(ret>=0) ff_h264_hl_decode_mb(h);
3410
3411             if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
3412                 s->mb_y++;
3413
3414                 ret = ff_h264_decode_mb_cabac(h);
3415
3416                 if(ret>=0) ff_h264_hl_decode_mb(h);
3417                 s->mb_y--;
3418             }
3419             eos = get_cabac_terminate( &h->cabac );
3420
3421             if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
3422                 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);
3423                 if (s->mb_x >= lf_x_start) loop_filter(h, lf_x_start, s->mb_x + 1);
3424                 return 0;
3425             }
3426             if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
3427                 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);
3428                 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);
3429                 return -1;
3430             }
3431
3432             if( ++s->mb_x >= s->mb_width ) {
3433                 loop_filter(h, lf_x_start, s->mb_x);
3434                 s->mb_x = lf_x_start = 0;
3435                 decode_finish_row(h);
3436                 ++s->mb_y;
3437                 if(FIELD_OR_MBAFF_PICTURE) {
3438                     ++s->mb_y;
3439                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
3440                         predict_field_decoding_flag(h);
3441                 }
3442             }
3443
3444             if( eos || s->mb_y >= s->mb_height ) {
3445                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
3446                 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);
3447                 if (s->mb_x > lf_x_start) loop_filter(h, lf_x_start, s->mb_x);
3448                 return 0;
3449             }
3450         }
3451
3452     } else {
3453         for(;;){
3454             int ret = ff_h264_decode_mb_cavlc(h);
3455
3456             if(ret>=0) ff_h264_hl_decode_mb(h);
3457
3458             if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
3459                 s->mb_y++;
3460                 ret = ff_h264_decode_mb_cavlc(h);
3461
3462                 if(ret>=0) ff_h264_hl_decode_mb(h);
3463                 s->mb_y--;
3464             }
3465
3466             if(ret<0){
3467                 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
3468                 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);
3469                 return -1;
3470             }
3471
3472             if(++s->mb_x >= s->mb_width){
3473                 loop_filter(h, lf_x_start, s->mb_x);
3474                 s->mb_x = lf_x_start = 0;
3475                 decode_finish_row(h);
3476                 ++s->mb_y;
3477                 if(FIELD_OR_MBAFF_PICTURE) {
3478                     ++s->mb_y;
3479                     if(FRAME_MBAFF && s->mb_y < s->mb_height)
3480                         predict_field_decoding_flag(h);
3481                 }
3482                 if(s->mb_y >= s->mb_height){
3483                     tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
3484
3485                     if(   get_bits_count(&s->gb) == s->gb.size_in_bits
3486                        || get_bits_count(&s->gb) <  s->gb.size_in_bits && s->avctx->error_recognition < FF_ER_AGGRESSIVE) {
3487                         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);
3488
3489                         return 0;
3490                     }else{
3491                         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);
3492
3493                         return -1;
3494                     }
3495                 }
3496             }
3497
3498             if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
3499                 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
3500                 if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
3501                     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);
3502                     if (s->mb_x > lf_x_start) loop_filter(h, lf_x_start, s->mb_x);
3503
3504                     return 0;
3505                 }else{
3506                     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);
3507
3508                     return -1;
3509                 }
3510             }
3511         }
3512     }
3513
3514 #if 0
3515     for(;s->mb_y < s->mb_height; s->mb_y++){
3516         for(;s->mb_x < s->mb_width; s->mb_x++){
3517             int ret= decode_mb(h);
3518
3519             ff_h264_hl_decode_mb(h);
3520
3521             if(ret<0){
3522                 av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
3523                 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);
3524
3525                 return -1;
3526             }
3527
3528             if(++s->mb_x >= s->mb_width){
3529                 s->mb_x=0;
3530                 if(++s->mb_y >= s->mb_height){
3531                     if(get_bits_count(s->gb) == s->gb.size_in_bits){
3532                         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);
3533
3534                         return 0;
3535                     }else{
3536                         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);
3537
3538                         return -1;
3539                     }
3540                 }
3541             }
3542
3543             if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
3544                 if(get_bits_count(s->gb) == s->gb.size_in_bits){
3545                     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);
3546
3547                     return 0;
3548                 }else{
3549                     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);
3550
3551                     return -1;
3552                 }
3553             }
3554         }
3555         s->mb_x=0;
3556         ff_draw_horiz_band(s, 16*s->mb_y, 16);
3557     }
3558 #endif
3559     return -1; //not reached
3560 }
3561
3562 /**
3563  * Call decode_slice() for each context.
3564  *
3565  * @param h h264 master context
3566  * @param context_count number of contexts to execute
3567  */
3568 static void execute_decode_slices(H264Context *h, int context_count){
3569     MpegEncContext * const s = &h->s;
3570     AVCodecContext * const avctx= s->avctx;
3571     H264Context *hx;
3572     int i;
3573
3574     if (s->avctx->hwaccel)
3575         return;
3576     if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
3577         return;
3578     if(context_count == 1) {
3579         decode_slice(avctx, &h);
3580     } else {
3581         for(i = 1; i < context_count; i++) {
3582             hx = h->thread_context[i];
3583             hx->s.error_recognition = avctx->error_recognition;
3584             hx->s.error_count = 0;
3585             hx->x264_build= h->x264_build;
3586         }
3587
3588         avctx->execute(avctx, (void *)decode_slice,
3589                        h->thread_context, NULL, context_count, sizeof(void*));
3590
3591         /* pull back stuff from slices to master context */
3592         hx = h->thread_context[context_count - 1];
3593         s->mb_x = hx->s.mb_x;
3594         s->mb_y = hx->s.mb_y;
3595         s->dropable = hx->s.dropable;
3596         s->picture_structure = hx->s.picture_structure;
3597         for(i = 1; i < context_count; i++)
3598             h->s.error_count += h->thread_context[i]->s.error_count;
3599     }
3600 }
3601
3602
3603 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
3604     MpegEncContext * const s = &h->s;
3605     AVCodecContext * const avctx= s->avctx;
3606     H264Context *hx; ///< thread context
3607     int buf_index;
3608     int context_count;
3609     int next_avc;
3610     int pass = !(avctx->active_thread_type & FF_THREAD_FRAME);
3611     int nals_needed=0; ///< number of NALs that need decoding before the next frame thread starts
3612     int nal_index;
3613
3614     h->max_contexts = (HAVE_THREADS && (s->avctx->active_thread_type&FF_THREAD_SLICE)) ? avctx->thread_count : 1;
3615     if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
3616         h->current_slice = 0;
3617         if (!s->first_field)
3618             s->current_picture_ptr= NULL;
3619         ff_h264_reset_sei(h);
3620     }
3621
3622     for(;pass <= 1;pass++){
3623         buf_index = 0;
3624         context_count = 0;
3625         next_avc = h->is_avc ? 0 : buf_size;
3626         nal_index = 0;
3627     for(;;){
3628         int consumed;
3629         int dst_length;
3630         int bit_length;
3631         const uint8_t *ptr;
3632         int i, nalsize = 0;
3633         int err;
3634
3635         if(buf_index >= next_avc) {
3636             if(buf_index >= buf_size) break;
3637             nalsize = 0;
3638             for(i = 0; i < h->nal_length_size; i++)
3639                 nalsize = (nalsize << 8) | buf[buf_index++];
3640             if(nalsize <= 0 || nalsize > buf_size - buf_index){
3641                 av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
3642                 break;
3643             }
3644             next_avc= buf_index + nalsize;
3645         } else {
3646             // start code prefix search
3647             for(; buf_index + 3 < next_avc; buf_index++){
3648                 // This should always succeed in the first iteration.
3649                 if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
3650                     break;
3651             }
3652
3653             if(buf_index+3 >= buf_size) break;
3654
3655             buf_index+=3;
3656             if(buf_index >= next_avc) continue;
3657         }
3658
3659         hx = h->thread_context[context_count];
3660
3661         ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
3662         if (ptr==NULL || dst_length < 0){
3663             return -1;
3664         }
3665         i= buf_index + consumed;
3666         if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
3667            buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
3668             s->workaround_bugs |= FF_BUG_TRUNCATED;
3669
3670         if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
3671         while(ptr[dst_length - 1] == 0 && dst_length > 0)
3672             dst_length--;
3673         }
3674         bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
3675
3676         if(s->avctx->debug&FF_DEBUG_STARTCODE){
3677             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);
3678         }
3679
3680         if (h->is_avc && (nalsize != consumed) && nalsize){
3681             av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
3682         }
3683
3684         buf_index += consumed;
3685         nal_index++;
3686
3687         if(pass == 0) {
3688             // packets can sometimes contain multiple PPS/SPS
3689             // e.g. two PAFF field pictures in one packet, or a demuxer which splits NALs strangely
3690             // if so, when frame threading we can't start the next thread until we've read all of them
3691             switch (hx->nal_unit_type) {
3692                 case NAL_SPS:
3693                 case NAL_PPS:
3694                 case NAL_IDR_SLICE:
3695                 case NAL_SLICE:
3696                     nals_needed = nal_index;
3697             }
3698             continue;
3699         }
3700
3701         //FIXME do not discard SEI id
3702         if(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0)
3703             continue;
3704
3705       again:
3706         err = 0;
3707         switch(hx->nal_unit_type){
3708         case NAL_IDR_SLICE:
3709             if (h->nal_unit_type != NAL_IDR_SLICE) {
3710                 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
3711                 return -1;
3712             }
3713             idr(h); //FIXME ensure we don't loose some frames if there is reordering
3714         case NAL_SLICE:
3715             init_get_bits(&hx->s.gb, ptr, bit_length);
3716             hx->intra_gb_ptr=
3717             hx->inter_gb_ptr= &hx->s.gb;
3718             hx->s.data_partitioning = 0;
3719
3720             if((err = decode_slice_header(hx, h)))
3721                break;
3722
3723             s->current_picture_ptr->key_frame |=
3724                     (hx->nal_unit_type == NAL_IDR_SLICE) ||
3725                     (h->sei_recovery_frame_cnt >= 0);
3726
3727             if (h->current_slice == 1) {
3728                 if(!(s->flags2 & CODEC_FLAG2_CHUNKS)) {
3729                     decode_postinit(h, nal_index >= nals_needed);
3730                 }
3731
3732                 if (s->avctx->hwaccel && s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
3733                     return -1;
3734                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
3735                     ff_vdpau_h264_picture_start(s);
3736             }
3737
3738             if(hx->redundant_pic_count==0
3739                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
3740                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=AV_PICTURE_TYPE_B)
3741                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==AV_PICTURE_TYPE_I)
3742                && avctx->skip_frame < AVDISCARD_ALL){
3743                 if(avctx->hwaccel) {
3744                     if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
3745                         return -1;
3746                 }else
3747                 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
3748                     static const uint8_t start_code[] = {0x00, 0x00, 0x01};
3749                     ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
3750                     ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
3751                 }else
3752                     context_count++;
3753             }
3754             break;
3755         case NAL_DPA:
3756             init_get_bits(&hx->s.gb, ptr, bit_length);
3757             hx->intra_gb_ptr=
3758             hx->inter_gb_ptr= NULL;
3759
3760             if ((err = decode_slice_header(hx, h)) < 0)
3761                 break;
3762
3763             hx->s.data_partitioning = 1;
3764
3765             break;
3766         case NAL_DPB:
3767             init_get_bits(&hx->intra_gb, ptr, bit_length);
3768             hx->intra_gb_ptr= &hx->intra_gb;
3769             break;
3770         case NAL_DPC:
3771             init_get_bits(&hx->inter_gb, ptr, bit_length);
3772             hx->inter_gb_ptr= &hx->inter_gb;
3773
3774             if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
3775                && s->context_initialized
3776                && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
3777                && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=AV_PICTURE_TYPE_B)
3778                && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==AV_PICTURE_TYPE_I)
3779                && avctx->skip_frame < AVDISCARD_ALL)
3780                 context_count++;
3781             break;
3782         case NAL_SEI:
3783             init_get_bits(&s->gb, ptr, bit_length);
3784             ff_h264_decode_sei(h);
3785             break;
3786         case NAL_SPS:
3787             init_get_bits(&s->gb, ptr, bit_length);
3788             ff_h264_decode_seq_parameter_set(h);
3789
3790             if (s->flags& CODEC_FLAG_LOW_DELAY ||
3791                 (h->sps.bitstream_restriction_flag && !h->sps.num_reorder_frames))
3792                 s->low_delay=1;
3793
3794             if(avctx->has_b_frames < 2)
3795                 avctx->has_b_frames= !s->low_delay;
3796
3797             if (avctx->bits_per_raw_sample != h->sps.bit_depth_luma) {
3798                 if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 10) {
3799                     avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
3800                     h->pixel_shift = h->sps.bit_depth_luma > 8;
3801
3802                     ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma);
3803                     ff_h264_pred_init(&h->hpc, s->codec_id, h->sps.bit_depth_luma);
3804                     dsputil_init(&s->dsp, s->avctx);
3805                 } else {
3806                     av_log(avctx, AV_LOG_DEBUG, "Unsupported bit depth: %d\n", h->sps.bit_depth_luma);
3807                     return -1;
3808                 }
3809             }
3810             break;
3811         case NAL_PPS:
3812             init_get_bits(&s->gb, ptr, bit_length);
3813
3814             ff_h264_decode_picture_parameter_set(h, bit_length);
3815
3816             break;
3817         case NAL_AUD:
3818         case NAL_END_SEQUENCE:
3819         case NAL_END_STREAM:
3820         case NAL_FILLER_DATA:
3821         case NAL_SPS_EXT:
3822         case NAL_AUXILIARY_SLICE:
3823             break;
3824         default:
3825             av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
3826         }
3827
3828         if(context_count == h->max_contexts) {
3829             execute_decode_slices(h, context_count);
3830             context_count = 0;
3831         }
3832
3833         if (err < 0)
3834             av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
3835         else if(err == 1) {
3836             /* Slice could not be decoded in parallel mode, copy down
3837              * NAL unit stuff to context 0 and restart. Note that
3838              * rbsp_buffer is not transferred, but since we no longer
3839              * run in parallel mode this should not be an issue. */
3840             h->nal_unit_type = hx->nal_unit_type;
3841             h->nal_ref_idc   = hx->nal_ref_idc;
3842             hx = h;
3843             goto again;
3844         }
3845     }
3846     }
3847     if(context_count)
3848         execute_decode_slices(h, context_count);
3849     return buf_index;
3850 }
3851
3852 /**
3853  * returns the number of bytes consumed for building the current frame
3854  */
3855 static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
3856         if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
3857         if(pos+10>buf_size) pos=buf_size; // oops ;)
3858
3859         return pos;
3860 }
3861
3862 static int decode_frame(AVCodecContext *avctx,
3863                              void *data, int *data_size,
3864                              AVPacket *avpkt)
3865 {
3866     const uint8_t *buf = avpkt->data;
3867     int buf_size = avpkt->size;
3868     H264Context *h = avctx->priv_data;
3869     MpegEncContext *s = &h->s;
3870     AVFrame *pict = data;
3871     int buf_index;
3872
3873     s->flags= avctx->flags;
3874     s->flags2= avctx->flags2;
3875
3876    /* end of stream, output what is still in the buffers */
3877  out:
3878     if (buf_size == 0) {
3879         Picture *out;
3880         int i, out_idx;
3881
3882         s->current_picture_ptr = NULL;
3883
3884 //FIXME factorize this with the output code below
3885         out = h->delayed_pic[0];
3886         out_idx = 0;
3887         for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
3888             if(h->delayed_pic[i]->poc < out->poc){
3889                 out = h->delayed_pic[i];
3890                 out_idx = i;
3891             }
3892
3893         for(i=out_idx; h->delayed_pic[i]; i++)
3894             h->delayed_pic[i] = h->delayed_pic[i+1];
3895
3896         if(out){
3897             *data_size = sizeof(AVFrame);
3898             *pict= *(AVFrame*)out;
3899         }
3900
3901         return 0;
3902     }
3903
3904     buf_index=decode_nal_units(h, buf, buf_size);
3905     if(buf_index < 0)
3906         return -1;
3907
3908     if (!s->current_picture_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
3909         buf_size = 0;
3910         goto out;
3911     }
3912
3913     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
3914         if (avctx->skip_frame >= AVDISCARD_NONREF)
3915             return 0;
3916         av_log(avctx, AV_LOG_ERROR, "no frame!\n");
3917         return -1;
3918     }
3919
3920     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
3921
3922         if(s->flags2 & CODEC_FLAG2_CHUNKS) decode_postinit(h, 1);
3923
3924         field_end(h, 0);
3925
3926         if (!h->next_output_pic) {
3927             /* Wait for second field. */
3928             *data_size = 0;
3929
3930         } else {
3931             *data_size = sizeof(AVFrame);
3932             *pict = *(AVFrame*)h->next_output_pic;
3933         }
3934     }
3935
3936     assert(pict->data[0] || !*data_size);
3937     ff_print_debug_info(s, pict);
3938 //printf("out %d\n", (int)pict->data[0]);
3939
3940     return get_consumed_bytes(s, buf_index, buf_size);
3941 }
3942 #if 0
3943 static inline void fill_mb_avail(H264Context *h){
3944     MpegEncContext * const s = &h->s;
3945     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
3946
3947     if(s->mb_y){
3948         h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
3949         h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
3950         h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
3951     }else{
3952         h->mb_avail[0]=
3953         h->mb_avail[1]=
3954         h->mb_avail[2]= 0;
3955     }
3956     h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
3957     h->mb_avail[4]= 1; //FIXME move out
3958     h->mb_avail[5]= 0; //FIXME move out
3959 }
3960 #endif
3961
3962 #ifdef TEST
3963 #undef printf
3964 #undef random
3965 #define COUNT 8000
3966 #define SIZE (COUNT*40)
3967 int main(void){
3968     int i;
3969     uint8_t temp[SIZE];
3970     PutBitContext pb;
3971     GetBitContext gb;
3972 //    int int_temp[10000];
3973     DSPContext dsp;
3974     AVCodecContext avctx;
3975
3976     dsputil_init(&dsp, &avctx);
3977
3978     init_put_bits(&pb, temp, SIZE);
3979     printf("testing unsigned exp golomb\n");
3980     for(i=0; i<COUNT; i++){
3981         START_TIMER
3982         set_ue_golomb(&pb, i);
3983         STOP_TIMER("set_ue_golomb");
3984     }
3985     flush_put_bits(&pb);
3986
3987     init_get_bits(&gb, temp, 8*SIZE);
3988     for(i=0; i<COUNT; i++){
3989         int j, s;
3990
3991         s= show_bits(&gb, 24);
3992
3993         START_TIMER
3994         j= get_ue_golomb(&gb);
3995         if(j != i){
3996             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
3997 //            return -1;
3998         }
3999         STOP_TIMER("get_ue_golomb");
4000     }
4001
4002
4003     init_put_bits(&pb, temp, SIZE);
4004     printf("testing signed exp golomb\n");
4005     for(i=0; i<COUNT; i++){
4006         START_TIMER
4007         set_se_golomb(&pb, i - COUNT/2);
4008         STOP_TIMER("set_se_golomb");
4009     }
4010     flush_put_bits(&pb);
4011
4012     init_get_bits(&gb, temp, 8*SIZE);
4013     for(i=0; i<COUNT; i++){
4014         int j, s;
4015
4016         s= show_bits(&gb, 24);
4017
4018         START_TIMER
4019         j= get_se_golomb(&gb);
4020         if(j != i - COUNT/2){
4021             printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
4022 //            return -1;
4023         }
4024         STOP_TIMER("get_se_golomb");
4025     }
4026
4027 #if 0
4028     printf("testing 4x4 (I)DCT\n");
4029
4030     DCTELEM block[16];
4031     uint8_t src[16], ref[16];
4032     uint64_t error= 0, max_error=0;
4033
4034     for(i=0; i<COUNT; i++){
4035         int j;
4036 //        printf("%d %d %d\n", r1, r2, (r2-r1)*16);
4037         for(j=0; j<16; j++){
4038             ref[j]= random()%255;
4039             src[j]= random()%255;
4040         }
4041
4042         h264_diff_dct_c(block, src, ref, 4);
4043
4044         //normalize
4045         for(j=0; j<16; j++){
4046 //            printf("%d ", block[j]);
4047             block[j]= block[j]*4;
4048             if(j&1) block[j]= (block[j]*4 + 2)/5;
4049             if(j&4) block[j]= (block[j]*4 + 2)/5;
4050         }
4051 //        printf("\n");
4052
4053         h->h264dsp.h264_idct_add(ref, block, 4);
4054 /*        for(j=0; j<16; j++){
4055             printf("%d ", ref[j]);
4056         }
4057         printf("\n");*/
4058
4059         for(j=0; j<16; j++){
4060             int diff= FFABS(src[j] - ref[j]);
4061
4062             error+= diff*diff;
4063             max_error= FFMAX(max_error, diff);
4064         }
4065     }
4066     printf("error=%f max_error=%d\n", ((float)error)/COUNT/16, (int)max_error );
4067     printf("testing quantizer\n");
4068     for(qp=0; qp<52; qp++){
4069         for(i=0; i<16; i++)
4070             src1_block[i]= src2_block[i]= random()%255;
4071
4072     }
4073     printf("Testing NAL layer\n");
4074
4075     uint8_t bitstream[COUNT];
4076     uint8_t nal[COUNT*2];
4077     H264Context h;
4078     memset(&h, 0, sizeof(H264Context));
4079
4080     for(i=0; i<COUNT; i++){
4081         int zeros= i;
4082         int nal_length;
4083         int consumed;
4084         int out_length;
4085         uint8_t *out;
4086         int j;
4087
4088         for(j=0; j<COUNT; j++){
4089             bitstream[j]= (random() % 255) + 1;
4090         }
4091
4092         for(j=0; j<zeros; j++){
4093             int pos= random() % COUNT;
4094             while(bitstream[pos] == 0){
4095                 pos++;
4096                 pos %= COUNT;
4097             }
4098             bitstream[pos]=0;
4099         }
4100
4101         START_TIMER
4102
4103         nal_length= encode_nal(&h, nal, bitstream, COUNT, COUNT*2);
4104         if(nal_length<0){
4105             printf("encoding failed\n");
4106             return -1;
4107         }
4108
4109         out= ff_h264_decode_nal(&h, nal, &out_length, &consumed, nal_length);
4110
4111         STOP_TIMER("NAL")
4112
4113         if(out_length != COUNT){
4114             printf("incorrect length %d %d\n", out_length, COUNT);
4115             return -1;
4116         }
4117
4118         if(consumed != nal_length){
4119             printf("incorrect consumed length %d %d\n", nal_length, consumed);
4120             return -1;
4121         }
4122
4123         if(memcmp(bitstream, out, COUNT)){
4124             printf("mismatch\n");
4125             return -1;
4126         }
4127     }
4128 #endif
4129
4130     printf("Testing RBSP\n");
4131
4132
4133     return 0;
4134 }
4135 #endif /* TEST */
4136
4137
4138 av_cold void ff_h264_free_context(H264Context *h)
4139 {
4140     int i;
4141
4142     free_tables(h, 1); //FIXME cleanup init stuff perhaps
4143
4144     for(i = 0; i < MAX_SPS_COUNT; i++)
4145         av_freep(h->sps_buffers + i);
4146
4147     for(i = 0; i < MAX_PPS_COUNT; i++)
4148         av_freep(h->pps_buffers + i);
4149 }
4150
4151 av_cold int ff_h264_decode_end(AVCodecContext *avctx)
4152 {
4153     H264Context *h = avctx->priv_data;
4154     MpegEncContext *s = &h->s;
4155
4156     ff_h264_free_context(h);
4157
4158     MPV_common_end(s);
4159
4160 //    memset(h, 0, sizeof(H264Context));
4161
4162     return 0;
4163 }
4164
4165 static const AVProfile profiles[] = {
4166     { FF_PROFILE_H264_BASELINE,             "Baseline"              },
4167     { FF_PROFILE_H264_CONSTRAINED_BASELINE, "Constrained Baseline"  },
4168     { FF_PROFILE_H264_MAIN,                 "Main"                  },
4169     { FF_PROFILE_H264_EXTENDED,             "Extended"              },
4170     { FF_PROFILE_H264_HIGH,                 "High"                  },
4171     { FF_PROFILE_H264_HIGH_10,              "High 10"               },
4172     { FF_PROFILE_H264_HIGH_10_INTRA,        "High 10 Intra"         },
4173     { FF_PROFILE_H264_HIGH_422,             "High 4:2:2"            },
4174     { FF_PROFILE_H264_HIGH_422_INTRA,       "High 4:2:2 Intra"      },
4175     { FF_PROFILE_H264_HIGH_444,             "High 4:4:4"            },
4176     { FF_PROFILE_H264_HIGH_444_PREDICTIVE,  "High 4:4:4 Predictive" },
4177     { FF_PROFILE_H264_HIGH_444_INTRA,       "High 4:4:4 Intra"      },
4178     { FF_PROFILE_H264_CAVLC_444,            "CAVLC 4:4:4"           },
4179     { FF_PROFILE_UNKNOWN },
4180 };
4181
4182 AVCodec ff_h264_decoder = {
4183     "h264",
4184     AVMEDIA_TYPE_VIDEO,
4185     CODEC_ID_H264,
4186     sizeof(H264Context),
4187     ff_h264_decode_init,
4188     NULL,
4189     ff_h264_decode_end,
4190     decode_frame,
4191     /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY |
4192         CODEC_CAP_SLICE_THREADS | CODEC_CAP_FRAME_THREADS,
4193     .flush= flush_dpb,
4194     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
4195     .init_thread_copy      = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
4196     .update_thread_context = ONLY_IF_THREADS_ENABLED(decode_update_thread_context),
4197     .profiles = NULL_IF_CONFIG_SMALL(profiles),
4198 };
4199
4200 #if CONFIG_H264_VDPAU_DECODER
4201 AVCodec ff_h264_vdpau_decoder = {
4202     "h264_vdpau",
4203     AVMEDIA_TYPE_VIDEO,
4204     CODEC_ID_H264,
4205     sizeof(H264Context),
4206     ff_h264_decode_init,
4207     NULL,
4208     ff_h264_decode_end,
4209     decode_frame,
4210     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
4211     .flush= flush_dpb,
4212     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
4213     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
4214     .profiles = NULL_IF_CONFIG_SMALL(profiles),
4215 };
4216 #endif