libavcodec/h264_ps.c

   1 /*
   2  * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
   3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav 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  * Libav 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 Libav; 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 parameter set decoding.
  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 "h264.h"
  33 #include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan)
  34 #include "golomb.h"
  35
  36
  37 //#undef NDEBUG
  38 #include <assert.h>
  39
  40 #define MAX_LOG2_MAX_FRAME_NUM    (12 + 4)
  41 #define MIN_LOG2_MAX_FRAME_NUM    4
  42
  43 static const AVRational pixel_aspect[17]={
  44  {0, 1},
  45  {1, 1},
  46  {12, 11},
  47  {10, 11},
  48  {16, 11},
  49  {40, 33},
  50  {24, 11},
  51  {20, 11},
  52  {32, 11},
  53  {80, 33},
  54  {18, 11},
  55  {15, 11},
  56  {64, 33},
  57  {160,99},
  58  {4, 3},
  59  {3, 2},
  60  {2, 1},
  61 };
  62
  63 #define QP(qP,depth) ( (qP)+6*((depth)-8) )
  64
  65 #define CHROMA_QP_TABLE_END(d) \
  66      QP(0,d),  QP(1,d),  QP(2,d),  QP(3,d),  QP(4,d),  QP(5,d),\
  67      QP(6,d),  QP(7,d),  QP(8,d),  QP(9,d), QP(10,d), QP(11,d),\
  68     QP(12,d), QP(13,d), QP(14,d), QP(15,d), QP(16,d), QP(17,d),\
  69     QP(18,d), QP(19,d), QP(20,d), QP(21,d), QP(22,d), QP(23,d),\
  70     QP(24,d), QP(25,d), QP(26,d), QP(27,d), QP(28,d), QP(29,d),\
  71     QP(29,d), QP(30,d), QP(31,d), QP(32,d), QP(32,d), QP(33,d),\
  72     QP(34,d), QP(34,d), QP(35,d), QP(35,d), QP(36,d), QP(36,d),\
  73     QP(37,d), QP(37,d), QP(37,d), QP(38,d), QP(38,d), QP(38,d),\
  74     QP(39,d), QP(39,d), QP(39,d), QP(39,d)
  75
  76 const uint8_t ff_h264_chroma_qp[3][QP_MAX_NUM+1] = {
  77     {
  78         CHROMA_QP_TABLE_END(8)
  79     },
  80     {
  81         0, 1, 2, 3, 4, 5,
  82         CHROMA_QP_TABLE_END(9)
  83     },
  84     {
  85         0, 1, 2, 3,  4,  5,
  86         6, 7, 8, 9, 10, 11,
  87         CHROMA_QP_TABLE_END(10)
  88     },
  89 };
  90
  91 static const uint8_t default_scaling4[2][16]={
  92 {   6,13,20,28,
  93    13,20,28,32,
  94    20,28,32,37,
  95    28,32,37,42
  96 },{
  97    10,14,20,24,
  98    14,20,24,27,
  99    20,24,27,30,
 100    24,27,30,34
 101 }};
 102
 103 static const uint8_t default_scaling8[2][64]={
 104 {   6,10,13,16,18,23,25,27,
 105    10,11,16,18,23,25,27,29,
 106    13,16,18,23,25,27,29,31,
 107    16,18,23,25,27,29,31,33,
 108    18,23,25,27,29,31,33,36,
 109    23,25,27,29,31,33,36,38,
 110    25,27,29,31,33,36,38,40,
 111    27,29,31,33,36,38,40,42
 112 },{
 113     9,13,15,17,19,21,22,24,
 114    13,13,17,19,21,22,24,25,
 115    15,17,19,21,22,24,25,27,
 116    17,19,21,22,24,25,27,28,
 117    19,21,22,24,25,27,28,30,
 118    21,22,24,25,27,28,30,32,
 119    22,24,25,27,28,30,32,33,
 120    24,25,27,28,30,32,33,35
 121 }};
 122
 123 static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
 124     int cpb_count, i;
 125     cpb_count = get_ue_golomb_31(&h->gb) + 1;
 126
 127     if(cpb_count > 32U){
 128         av_log(h->avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
 129         return -1;
 130     }
 131
 132     get_bits(&h->gb, 4); /* bit_rate_scale */
 133     get_bits(&h->gb, 4); /* cpb_size_scale */
 134     for(i=0; i<cpb_count; i++){
 135         get_ue_golomb_long(&h->gb); /* bit_rate_value_minus1 */
 136         get_ue_golomb_long(&h->gb); /* cpb_size_value_minus1 */
 137         get_bits1(&h->gb);     /* cbr_flag */
 138     }
 139     sps->initial_cpb_removal_delay_length = get_bits(&h->gb, 5) + 1;
 140     sps->cpb_removal_delay_length = get_bits(&h->gb, 5) + 1;
 141     sps->dpb_output_delay_length = get_bits(&h->gb, 5) + 1;
 142     sps->time_offset_length = get_bits(&h->gb, 5);
 143     sps->cpb_cnt = cpb_count;
 144     return 0;
 145 }
 146
 147 static inline int decode_vui_parameters(H264Context *h, SPS *sps){
 148     int aspect_ratio_info_present_flag;
 149     unsigned int aspect_ratio_idc;
 150
 151     aspect_ratio_info_present_flag= get_bits1(&h->gb);
 152
 153     if( aspect_ratio_info_present_flag ) {
 154         aspect_ratio_idc= get_bits(&h->gb, 8);
 155         if( aspect_ratio_idc == EXTENDED_SAR ) {
 156             sps->sar.num= get_bits(&h->gb, 16);
 157             sps->sar.den= get_bits(&h->gb, 16);
 158         }else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
 159             sps->sar=  pixel_aspect[aspect_ratio_idc];
 160         }else{
 161             av_log(h->avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
 162             return -1;
 163         }
 164     }else{
 165         sps->sar.num=
 166         sps->sar.den= 0;
 167     }
 168 //            s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);
 169
 170     if(get_bits1(&h->gb)){      /* overscan_info_present_flag */
 171         get_bits1(&h->gb);      /* overscan_appropriate_flag */
 172     }
 173
 174     sps->video_signal_type_present_flag = get_bits1(&h->gb);
 175     if(sps->video_signal_type_present_flag){
 176         get_bits(&h->gb, 3);    /* video_format */
 177         sps->full_range = get_bits1(&h->gb); /* video_full_range_flag */
 178
 179         sps->colour_description_present_flag = get_bits1(&h->gb);
 180         if(sps->colour_description_present_flag){
 181             sps->color_primaries = get_bits(&h->gb, 8); /* colour_primaries */
 182             sps->color_trc       = get_bits(&h->gb, 8); /* transfer_characteristics */
 183             sps->colorspace      = get_bits(&h->gb, 8); /* matrix_coefficients */
 184             if (sps->color_primaries >= AVCOL_PRI_NB)
 185                 sps->color_primaries  = AVCOL_PRI_UNSPECIFIED;
 186             if (sps->color_trc >= AVCOL_TRC_NB)
 187                 sps->color_trc  = AVCOL_TRC_UNSPECIFIED;
 188             if (sps->colorspace >= AVCOL_SPC_NB)
 189                 sps->colorspace  = AVCOL_SPC_UNSPECIFIED;
 190         }
 191     }
 192
 193     if(get_bits1(&h->gb)){      /* chroma_location_info_present_flag */
 194         h->avctx->chroma_sample_location = get_ue_golomb(&h->gb)+1;  /* chroma_sample_location_type_top_field */
 195         get_ue_golomb(&h->gb);  /* chroma_sample_location_type_bottom_field */
 196     }
 197
 198     sps->timing_info_present_flag = get_bits1(&h->gb);
 199     if(sps->timing_info_present_flag){
 200         sps->num_units_in_tick = get_bits_long(&h->gb, 32);
 201         sps->time_scale = get_bits_long(&h->gb, 32);
 202         if(!sps->num_units_in_tick || !sps->time_scale){
 203             av_log(h->avctx, AV_LOG_ERROR, "time_scale/num_units_in_tick invalid or unsupported (%d/%d)\n", sps->time_scale, sps->num_units_in_tick);
 204             return -1;
 205         }
 206         sps->fixed_frame_rate_flag = get_bits1(&h->gb);
 207     }
 208
 209     sps->nal_hrd_parameters_present_flag = get_bits1(&h->gb);
 210     if(sps->nal_hrd_parameters_present_flag)
 211         if(decode_hrd_parameters(h, sps) < 0)
 212             return -1;
 213     sps->vcl_hrd_parameters_present_flag = get_bits1(&h->gb);
 214     if(sps->vcl_hrd_parameters_present_flag)
 215         if(decode_hrd_parameters(h, sps) < 0)
 216             return -1;
 217     if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
 218         get_bits1(&h->gb);     /* low_delay_hrd_flag */
 219     sps->pic_struct_present_flag = get_bits1(&h->gb);
 220
 221     sps->bitstream_restriction_flag = get_bits1(&h->gb);
 222     if(sps->bitstream_restriction_flag){
 223         get_bits1(&h->gb);     /* motion_vectors_over_pic_boundaries_flag */
 224         get_ue_golomb(&h->gb); /* max_bytes_per_pic_denom */
 225         get_ue_golomb(&h->gb); /* max_bits_per_mb_denom */
 226         get_ue_golomb(&h->gb); /* log2_max_mv_length_horizontal */
 227         get_ue_golomb(&h->gb); /* log2_max_mv_length_vertical */
 228         sps->num_reorder_frames= get_ue_golomb(&h->gb);
 229         get_ue_golomb(&h->gb); /*max_dec_frame_buffering*/
 230
 231         if (get_bits_left(&h->gb) < 0) {
 232             sps->num_reorder_frames=0;
 233             sps->bitstream_restriction_flag= 0;
 234         }
 235
 236         if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
 237             av_log(h->avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
 238             return -1;
 239         }
 240     }
 241     if (get_bits_left(&h->gb) < 0) {
 242         av_log(h->avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", -get_bits_left(&h->gb));
 243         return AVERROR_INVALIDDATA;
 244     }
 245
 246     return 0;
 247 }
 248
 249 static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
 250                                 const uint8_t *jvt_list, const uint8_t *fallback_list){
 251     int i, last = 8, next = 8;
 252     const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
 253     if(!get_bits1(&h->gb)) /* matrix not written, we use the predicted one */
 254         memcpy(factors, fallback_list, size*sizeof(uint8_t));
 255     else
 256     for(i=0;i<size;i++){
 257         if(next)
 258             next = (last + get_se_golomb(&h->gb)) & 0xff;
 259         if(!i && !next){ /* matrix not written, we use the preset one */
 260             memcpy(factors, jvt_list, size*sizeof(uint8_t));
 261             break;
 262         }
 263         last = factors[scan[i]] = next ? next : last;
 264     }
 265 }
 266
 267 static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
 268                                    uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
 269     int fallback_sps = !is_sps && sps->scaling_matrix_present;
 270     const uint8_t *fallback[4] = {
 271         fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
 272         fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
 273         fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
 274         fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
 275     };
 276     if(get_bits1(&h->gb)){
 277         sps->scaling_matrix_present |= is_sps;
 278         decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
 279         decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
 280         decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
 281         decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
 282         decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
 283         decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
 284         if(is_sps || pps->transform_8x8_mode){
 285             decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
 286             if(sps->chroma_format_idc == 3){
 287                 decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[0],scaling_matrix8[0]);  // Intra, Cr
 288                 decode_scaling_list(h,scaling_matrix8[2],64,default_scaling8[0],scaling_matrix8[1]);  // Intra, Cb
 289             }
 290             decode_scaling_list(h,scaling_matrix8[3],64,default_scaling8[1],fallback[3]);  // Inter, Y
 291             if(sps->chroma_format_idc == 3){
 292                 decode_scaling_list(h,scaling_matrix8[4],64,default_scaling8[1],scaling_matrix8[3]);  // Inter, Cr
 293                 decode_scaling_list(h,scaling_matrix8[5],64,default_scaling8[1],scaling_matrix8[4]);  // Inter, Cb
 294             }
 295         }
 296     }
 297 }
 298
 299 int ff_h264_decode_seq_parameter_set(H264Context *h){
 300     int profile_idc, level_idc, constraint_set_flags = 0;
 301     unsigned int sps_id;
 302     int i, log2_max_frame_num_minus4;
 303     SPS *sps;
 304
 305     profile_idc= get_bits(&h->gb, 8);
 306     constraint_set_flags |= get_bits1(&h->gb) << 0;   //constraint_set0_flag
 307     constraint_set_flags |= get_bits1(&h->gb) << 1;   //constraint_set1_flag
 308     constraint_set_flags |= get_bits1(&h->gb) << 2;   //constraint_set2_flag
 309     constraint_set_flags |= get_bits1(&h->gb) << 3;   //constraint_set3_flag
 310     get_bits(&h->gb, 4); // reserved
 311     level_idc= get_bits(&h->gb, 8);
 312     sps_id= get_ue_golomb_31(&h->gb);
 313
 314     if(sps_id >= MAX_SPS_COUNT) {
 315         av_log(h->avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
 316         return -1;
 317     }
 318     sps= av_mallocz(sizeof(SPS));
 319     if(sps == NULL)
 320         return -1;
 321
 322     sps->time_offset_length = 24;
 323     sps->profile_idc= profile_idc;
 324     sps->constraint_set_flags = constraint_set_flags;
 325     sps->level_idc= level_idc;
 326
 327     memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
 328     memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
 329     sps->scaling_matrix_present = 0;
 330
 331     if (sps->profile_idc == 100 || sps->profile_idc == 110 ||
 332         sps->profile_idc == 122 || sps->profile_idc == 244 ||
 333         sps->profile_idc ==  44 || sps->profile_idc ==  83 ||
 334         sps->profile_idc ==  86 || sps->profile_idc == 118 ||
 335         sps->profile_idc == 128 || sps->profile_idc == 144) {
 336         sps->chroma_format_idc= get_ue_golomb_31(&h->gb);
 337         if(sps->chroma_format_idc > 3) {
 338             av_log(h->avctx, AV_LOG_ERROR, "chroma_format_idc (%u) out of range\n", sps->chroma_format_idc);
 339             goto fail;
 340         } else if(sps->chroma_format_idc == 3) {
 341             sps->residual_color_transform_flag = get_bits1(&h->gb);
 342         }
 343         sps->bit_depth_luma   = get_ue_golomb(&h->gb) + 8;
 344         sps->bit_depth_chroma = get_ue_golomb(&h->gb) + 8;
 345         sps->transform_bypass = get_bits1(&h->gb);
 346         decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
 347     }else{
 348         sps->chroma_format_idc= 1;
 349         sps->bit_depth_luma   = 8;
 350         sps->bit_depth_chroma = 8;
 351     }
 352
 353     log2_max_frame_num_minus4 = get_ue_golomb(&h->gb);
 354     if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
 355         log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
 356         av_log(h->avctx, AV_LOG_ERROR,
 357                "log2_max_frame_num_minus4 out of range (0-12): %d\n",
 358                log2_max_frame_num_minus4);
 359         goto fail;
 360     }
 361     sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
 362
 363     sps->poc_type= get_ue_golomb_31(&h->gb);
 364
 365     if(sps->poc_type == 0){ //FIXME #define
 366         sps->log2_max_poc_lsb= get_ue_golomb(&h->gb) + 4;
 367     } else if(sps->poc_type == 1){//FIXME #define
 368         sps->delta_pic_order_always_zero_flag= get_bits1(&h->gb);
 369         sps->offset_for_non_ref_pic= get_se_golomb(&h->gb);
 370         sps->offset_for_top_to_bottom_field= get_se_golomb(&h->gb);
 371         sps->poc_cycle_length                = get_ue_golomb(&h->gb);
 372
 373         if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
 374             av_log(h->avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
 375             goto fail;
 376         }
 377
 378         for(i=0; i<sps->poc_cycle_length; i++)
 379             sps->offset_for_ref_frame[i]= get_se_golomb(&h->gb);
 380     }else if(sps->poc_type != 2){
 381         av_log(h->avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
 382         goto fail;
 383     }
 384
 385     sps->ref_frame_count= get_ue_golomb_31(&h->gb);
 386     if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
 387         av_log(h->avctx, AV_LOG_ERROR, "too many reference frames\n");
 388         goto fail;
 389     }
 390     sps->gaps_in_frame_num_allowed_flag= get_bits1(&h->gb);
 391     sps->mb_width = get_ue_golomb(&h->gb) + 1;
 392     sps->mb_height= get_ue_golomb(&h->gb) + 1;
 393     if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
 394        av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->avctx)){
 395         av_log(h->avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
 396         goto fail;
 397     }
 398
 399     sps->frame_mbs_only_flag= get_bits1(&h->gb);
 400     if(!sps->frame_mbs_only_flag)
 401         sps->mb_aff= get_bits1(&h->gb);
 402     else
 403         sps->mb_aff= 0;
 404
 405     sps->direct_8x8_inference_flag= get_bits1(&h->gb);
 406     if(!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag){
 407         av_log(h->avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
 408         goto fail;
 409     }
 410
 411 #ifndef ALLOW_INTERLACE
 412     if(sps->mb_aff)
 413         av_log(h->avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
 414 #endif
 415     sps->crop= get_bits1(&h->gb);
 416     if(sps->crop){
 417         int crop_vertical_limit   = sps->chroma_format_idc  & 2 ? 16 : 8;
 418         int crop_horizontal_limit = sps->chroma_format_idc == 3 ? 16 : 8;
 419         sps->crop_left  = get_ue_golomb(&h->gb);
 420         sps->crop_right = get_ue_golomb(&h->gb);
 421         sps->crop_top   = get_ue_golomb(&h->gb);
 422         sps->crop_bottom= get_ue_golomb(&h->gb);
 423         if (h->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
 424             av_log(h->avctx, AV_LOG_DEBUG,
 425                    "discarding sps cropping, "
 426                    "original values are l:%u r:%u t:%u b:%u\n",
 427                    sps->crop_left,
 428                    sps->crop_right,
 429                    sps->crop_top,
 430                    sps->crop_bottom);
 431
 432             sps->crop_left   =
 433             sps->crop_right  =
 434             sps->crop_top    =
 435             sps->crop_bottom = 0;
 436         }
 437         if(sps->crop_left || sps->crop_top){
 438             av_log(h->avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
 439         }
 440         if(sps->crop_right >= crop_horizontal_limit || sps->crop_bottom >= crop_vertical_limit){
 441             av_log(h->avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
 442         }
 443     }else{
 444         sps->crop_left  =
 445         sps->crop_right =
 446         sps->crop_top   =
 447         sps->crop_bottom= 0;
 448     }
 449
 450     sps->vui_parameters_present_flag= get_bits1(&h->gb);
 451     if( sps->vui_parameters_present_flag )
 452         if (decode_vui_parameters(h, sps) < 0)
 453             goto fail;
 454
 455     if(!sps->sar.den)
 456         sps->sar.den= 1;
 457
 458     if(h->avctx->debug&FF_DEBUG_PICT_INFO){
 459         static const char csp[4][5] = { "Gray", "420", "422", "444" };
 460         av_log(h->avctx, AV_LOG_DEBUG, "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%d/%d/%d/%d %s %s %d/%d\n",
 461                sps_id, sps->profile_idc, sps->level_idc,
 462                sps->poc_type,
 463                sps->ref_frame_count,
 464                sps->mb_width, sps->mb_height,
 465                sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
 466                sps->direct_8x8_inference_flag ? "8B8" : "",
 467                sps->crop_left, sps->crop_right,
 468                sps->crop_top, sps->crop_bottom,
 469                sps->vui_parameters_present_flag ? "VUI" : "",
 470                csp[sps->chroma_format_idc],
 471                sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
 472                sps->timing_info_present_flag ? sps->time_scale : 0
 473                );
 474     }
 475     sps->new = 1;
 476
 477     av_free(h->sps_buffers[sps_id]);
 478     h->sps_buffers[sps_id] = sps;
 479     h->sps                 = *sps;
 480     h->current_sps_id      = sps_id;
 481
 482     return 0;
 483 fail:
 484     av_free(sps);
 485     return -1;
 486 }
 487
 488 static void
 489 build_qp_table(PPS *pps, int t, int index, const int depth)
 490 {
 491     int i;
 492     const int max_qp = 51 + 6*(depth-8);
 493     for(i = 0; i < max_qp+1; i++)
 494         pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[depth-8][av_clip(i + index, 0, max_qp)];
 495 }
 496
 497 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
 498     unsigned int pps_id= get_ue_golomb(&h->gb);
 499     PPS *pps;
 500     const int qp_bd_offset = 6*(h->sps.bit_depth_luma-8);
 501     int bits_left;
 502
 503     if(pps_id >= MAX_PPS_COUNT) {
 504         av_log(h->avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
 505         return -1;
 506     } else if (h->sps.bit_depth_luma > 10) {
 507         av_log(h->avctx, AV_LOG_ERROR, "Unimplemented luma bit depth=%d (max=10)\n", h->sps.bit_depth_luma);
 508         return AVERROR_PATCHWELCOME;
 509     }
 510
 511     pps= av_mallocz(sizeof(PPS));
 512     if(pps == NULL)
 513         return -1;
 514     pps->sps_id= get_ue_golomb_31(&h->gb);
 515     if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
 516         av_log(h->avctx, AV_LOG_ERROR, "sps_id out of range\n");
 517         goto fail;
 518     }
 519
 520     pps->cabac= get_bits1(&h->gb);
 521     pps->pic_order_present= get_bits1(&h->gb);
 522     pps->slice_group_count= get_ue_golomb(&h->gb) + 1;
 523     if(pps->slice_group_count > 1 ){
 524         pps->mb_slice_group_map_type= get_ue_golomb(&h->gb);
 525         av_log(h->avctx, AV_LOG_ERROR, "FMO not supported\n");
 526         switch(pps->mb_slice_group_map_type){
 527         case 0:
 528 #if 0
 529 |   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
 530 |    run_length[ i ]                                |1  |ue(v)   |
 531 #endif
 532             break;
 533         case 2:
 534 #if 0
 535 |   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
 536 |{                                                  |   |        |
 537 |    top_left_mb[ i ]                               |1  |ue(v)   |
 538 |    bottom_right_mb[ i ]                           |1  |ue(v)   |
 539 |   }                                               |   |        |
 540 #endif
 541             break;
 542         case 3:
 543         case 4:
 544         case 5:
 545 #if 0
 546 |   slice_group_change_direction_flag               |1  |u(1)    |
 547 |   slice_group_change_rate_minus1                  |1  |ue(v)   |
 548 #endif
 549             break;
 550         case 6:
 551 #if 0
 552 |   slice_group_id_cnt_minus1                       |1  |ue(v)   |
 553 |   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
 554 |)                                                  |   |        |
 555 |    slice_group_id[ i ]                            |1  |u(v)    |
 556 #endif
 557             break;
 558         }
 559     }
 560     pps->ref_count[0]= get_ue_golomb(&h->gb) + 1;
 561     pps->ref_count[1]= get_ue_golomb(&h->gb) + 1;
 562     if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
 563         av_log(h->avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
 564         goto fail;
 565     }
 566
 567     pps->weighted_pred= get_bits1(&h->gb);
 568     pps->weighted_bipred_idc= get_bits(&h->gb, 2);
 569     pps->init_qp= get_se_golomb(&h->gb) + 26 + qp_bd_offset;
 570     pps->init_qs= get_se_golomb(&h->gb) + 26 + qp_bd_offset;
 571     pps->chroma_qp_index_offset[0]= get_se_golomb(&h->gb);
 572     pps->deblocking_filter_parameters_present= get_bits1(&h->gb);
 573     pps->constrained_intra_pred= get_bits1(&h->gb);
 574     pps->redundant_pic_cnt_present = get_bits1(&h->gb);
 575
 576     pps->transform_8x8_mode= 0;
 577     h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
 578     memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
 579     memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
 580
 581     bits_left = bit_length - get_bits_count(&h->gb);
 582     if (bits_left && (bits_left > 8 ||
 583                       show_bits(&h->gb, bits_left) != 1 << (bits_left - 1))) {
 584         pps->transform_8x8_mode= get_bits1(&h->gb);
 585         decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
 586         pps->chroma_qp_index_offset[1]= get_se_golomb(&h->gb); //second_chroma_qp_index_offset
 587     } else {
 588         pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
 589     }
 590
 591     build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], h->sps.bit_depth_luma);
 592     build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], h->sps.bit_depth_luma);
 593     if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
 594         pps->chroma_qp_diff= 1;
 595
 596     if(h->avctx->debug&FF_DEBUG_PICT_INFO){
 597         av_log(h->avctx, AV_LOG_DEBUG, "pps:%u sps:%u %s slice_groups:%d ref:%d/%d %s qp:%d/%d/%d/%d %s %s %s %s\n",
 598                pps_id, pps->sps_id,
 599                pps->cabac ? "CABAC" : "CAVLC",
 600                pps->slice_group_count,
 601                pps->ref_count[0], pps->ref_count[1],
 602                pps->weighted_pred ? "weighted" : "",
 603                pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
 604                pps->deblocking_filter_parameters_present ? "LPAR" : "",
 605                pps->constrained_intra_pred ? "CONSTR" : "",
 606                pps->redundant_pic_cnt_present ? "REDU" : "",
 607                pps->transform_8x8_mode ? "8x8DCT" : ""
 608                );
 609     }
 610
 611     av_free(h->pps_buffers[pps_id]);
 612     h->pps_buffers[pps_id]= pps;
 613     return 0;
 614 fail:
 615     av_free(pps);
 616     return -1;
 617 }