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