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annotate libavcodec/h264_ps.c @ 3:0b056460c67d

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changed code to use VSs
author Nina Engelhardt <nengel@mailbox.tu-berlin.de>
date Mon, 29 Oct 2012 16:44:27 +0100
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rev   line source
nengel@2 1 /*
nengel@2 2 * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
nengel@2 3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
nengel@2 4 *
nengel@2 5 * This file is part of FFmpeg.
nengel@2 6 *
nengel@2 7 * FFmpeg is free software; you can redistribute it and/or
nengel@2 8 * modify it under the terms of the GNU Lesser General Public
nengel@2 9 * License as published by the Free Software Foundation; either
nengel@2 10 * version 2.1 of the License, or (at your option) any later version.
nengel@2 11 *
nengel@2 12 * FFmpeg is distributed in the hope that it will be useful,
nengel@2 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
nengel@2 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
nengel@2 15 * Lesser General Public License for more details.
nengel@2 16 *
nengel@2 17 * You should have received a copy of the GNU Lesser General Public
nengel@2 18 * License along with FFmpeg; if not, write to the Free Software
nengel@2 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
nengel@2 20 */
nengel@2 21
nengel@2 22 /**
nengel@2 23 * @file
nengel@2 24 * H.264 / AVC / MPEG4 part10 parameter set decoding.
nengel@2 25 * @author Michael Niedermayer <michaelni@gmx.at>
nengel@2 26 */
nengel@2 27
nengel@2 28 #include "dsputil.h"
nengel@2 29 #include "avcodec.h"
nengel@2 30 #include "h264_types.h"
nengel@2 31 #include "h264_data.h"
nengel@2 32 #include "golomb.h"
nengel@2 33
nengel@2 34
nengel@2 35 //#undef NDEBUG
nengel@2 36 #include <assert.h>
nengel@2 37
nengel@2 38 static const int pixel_aspect[17][2]={
nengel@2 39 {0, 1},
nengel@2 40 {1, 1},
nengel@2 41 {12, 11},
nengel@2 42 {10, 11},
nengel@2 43 {16, 11},
nengel@2 44 {40, 33},
nengel@2 45 {24, 11},
nengel@2 46 {20, 11},
nengel@2 47 {32, 11},
nengel@2 48 {80, 33},
nengel@2 49 {18, 11},
nengel@2 50 {15, 11},
nengel@2 51 {64, 33},
nengel@2 52 {160,99},
nengel@2 53 {4, 3},
nengel@2 54 {3, 2},
nengel@2 55 {2, 1},
nengel@2 56 };
nengel@2 57
nengel@2 58 const uint8_t ff_h264_chroma_qp[52]={
nengel@2 59 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,
nengel@2 60 12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,
nengel@2 61 28,29,29,30,31,32,32,33,34,34,35,35,36,36,37,37,
nengel@2 62 37,38,38,38,39,39,39,39
nengel@2 63 };
nengel@2 64
nengel@2 65 static const uint8_t default_scaling4[2][16]={
nengel@2 66 { 6,13,20,28,
nengel@2 67 13,20,28,32,
nengel@2 68 20,28,32,37,
nengel@2 69 28,32,37,42
nengel@2 70 },{
nengel@2 71 10,14,20,24,
nengel@2 72 14,20,24,27,
nengel@2 73 20,24,27,30,
nengel@2 74 24,27,30,34
nengel@2 75 }};
nengel@2 76
nengel@2 77 static const uint8_t default_scaling8[2][64]={
nengel@2 78 { 6,10,13,16,18,23,25,27,
nengel@2 79 10,11,16,18,23,25,27,29,
nengel@2 80 13,16,18,23,25,27,29,31,
nengel@2 81 16,18,23,25,27,29,31,33,
nengel@2 82 18,23,25,27,29,31,33,36,
nengel@2 83 23,25,27,29,31,33,36,38,
nengel@2 84 25,27,29,31,33,36,38,40,
nengel@2 85 27,29,31,33,36,38,40,42
nengel@2 86 },{
nengel@2 87 9,13,15,17,19,21,22,24,
nengel@2 88 13,13,17,19,21,22,24,25,
nengel@2 89 15,17,19,21,22,24,25,27,
nengel@2 90 17,19,21,22,24,25,27,28,
nengel@2 91 19,21,22,24,25,27,28,30,
nengel@2 92 21,22,24,25,27,28,30,32,
nengel@2 93 22,24,25,27,28,30,32,33,
nengel@2 94 24,25,27,28,30,32,33,35
nengel@2 95 }};
nengel@2 96
nengel@2 97 static inline int decode_hrd_parameters(GetBitContext *gb, SPS *sps){
nengel@2 98 int cpb_count, i;
nengel@2 99 cpb_count = get_ue_golomb_31(gb) + 1;
nengel@2 100
nengel@2 101 if(cpb_count > 32){
nengel@2 102 av_log(AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
nengel@2 103 return -1;
nengel@2 104 }
nengel@2 105
nengel@2 106 get_bits(gb, 4); /* bit_rate_scale */
nengel@2 107 get_bits(gb, 4); /* cpb_size_scale */
nengel@2 108 for(i=0; i<cpb_count; i++){
nengel@2 109 get_ue_golomb(gb); /* bit_rate_value_minus1 */
nengel@2 110 get_ue_golomb(gb); /* cpb_size_value_minus1 */
nengel@2 111 get_bits1(gb); /* cbr_flag */
nengel@2 112 }
nengel@2 113 sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
nengel@2 114 sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
nengel@2 115 sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
nengel@2 116 sps->time_offset_length = get_bits(gb, 5);
nengel@2 117 sps->cpb_cnt = cpb_count;
nengel@2 118 return 0;
nengel@2 119 }
nengel@2 120
nengel@2 121 static inline int decode_vui_parameters(GetBitContext *gb, SPS *sps){
nengel@2 122 int aspect_ratio_info_present_flag;
nengel@2 123 unsigned int aspect_ratio_idc;
nengel@2 124
nengel@2 125 aspect_ratio_info_present_flag= get_bits1(gb);
nengel@2 126
nengel@2 127 if( aspect_ratio_info_present_flag ) {
nengel@2 128 aspect_ratio_idc= get_bits(gb, 8);
nengel@2 129 if( aspect_ratio_idc == EXTENDED_SAR ) {
nengel@2 130 sps->num= get_bits(gb, 16);
nengel@2 131 sps->den= get_bits(gb, 16);
nengel@2 132 }else if(aspect_ratio_idc < sizeof(pixel_aspect)/sizeof(int[2])){
nengel@2 133 //sps->sar= pixel_aspect[aspect_ratio_idc];
nengel@2 134 }else{
nengel@2 135 av_log( AV_LOG_ERROR, "illegal aspect ratio idc %d\n", aspect_ratio_idc);
nengel@2 136 // return -1;
nengel@2 137 }
nengel@2 138 }else{
nengel@2 139 sps->num=
nengel@2 140 sps->den= 0;
nengel@2 141 }
nengel@2 142
nengel@2 143 if(get_bits1(gb)){ /* overscan_info_present_flag */
nengel@2 144 get_bits1(gb); /* overscan_appropriate_flag */
nengel@2 145 }
nengel@2 146
nengel@2 147 sps->video_signal_type_present_flag = get_bits1(gb);
nengel@2 148 if(sps->video_signal_type_present_flag){
nengel@2 149 get_bits(gb, 3); /* video_format */
nengel@2 150 sps->full_range = get_bits1(gb); /* video_full_range_flag */
nengel@2 151
nengel@2 152 sps->colour_description_present_flag = get_bits1(gb);
nengel@2 153 if(sps->colour_description_present_flag){
nengel@2 154 sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
nengel@2 155 sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
nengel@2 156 sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
nengel@2 157 if (sps->color_primaries >= AVCOL_PRI_NB)
nengel@2 158 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
nengel@2 159 if (sps->color_trc >= AVCOL_TRC_NB)
nengel@2 160 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
nengel@2 161 if (sps->colorspace >= AVCOL_SPC_NB)
nengel@2 162 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
nengel@2 163 }
nengel@2 164 }
nengel@2 165
nengel@2 166 if(get_bits1(gb)){ /* chroma_location_info_present_flag */
nengel@2 167 av_log(AV_LOG_ERROR, "chroma_location_info_present_flag found, but not supported\n");
nengel@2 168 (void) (get_ue_golomb(gb)+1); /* chroma_sample_location_type_top_field */
nengel@2 169 (void) get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
nengel@2 170 }
nengel@2 171
nengel@2 172 sps->timing_info_present_flag = get_bits1(gb);
nengel@2 173 if(sps->timing_info_present_flag){
nengel@2 174 sps->num_units_in_tick = get_bits_long(gb, 32);
nengel@2 175 sps->time_scale = get_bits_long(gb, 32);
nengel@2 176 if(!sps->num_units_in_tick || !sps->time_scale){
nengel@2 177 av_log(AV_LOG_ERROR, "time_scale/num_units_in_tick invalid or unsupported (%d/%d)\n", sps->time_scale, sps->num_units_in_tick);
nengel@2 178 return -1;
nengel@2 179 }
nengel@2 180 sps->fixed_frame_rate_flag = get_bits1(gb);
nengel@2 181 }
nengel@2 182
nengel@2 183 sps->nal_hrd_parameters_present_flag = get_bits1(gb);
nengel@2 184 if(sps->nal_hrd_parameters_present_flag)
nengel@2 185 if(decode_hrd_parameters(gb, sps) < 0)
nengel@2 186 return -1;
nengel@2 187 sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
nengel@2 188 if(sps->vcl_hrd_parameters_present_flag)
nengel@2 189 if(decode_hrd_parameters(gb, sps) < 0)
nengel@2 190 return -1;
nengel@2 191 if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
nengel@2 192 get_bits1(gb); /* low_delay_hrd_flag */
nengel@2 193 sps->pic_struct_present_flag = get_bits1(gb);
nengel@2 194
nengel@2 195 sps->bitstream_restriction_flag = get_bits1(gb);
nengel@2 196 if(sps->bitstream_restriction_flag){
nengel@2 197 get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
nengel@2 198 get_ue_golomb(gb); /* max_bytes_per_pic_denom */
nengel@2 199 get_ue_golomb(gb); /* max_bits_per_mb_denom */
nengel@2 200 get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
nengel@2 201 get_ue_golomb(gb); /* log2_max_mv_length_vertical */
nengel@2 202 sps->num_reorder_frames= get_ue_golomb(gb);
nengel@2 203 get_ue_golomb(gb); /*max_dec_frame_buffering*/
nengel@2 204
nengel@2 205 if(sps->num_reorder_frames > 16 /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
nengel@2 206 av_log(AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
nengel@2 207 return -1;
nengel@2 208 }
nengel@2 209 }
nengel@2 210
nengel@2 211 return 0;
nengel@2 212 }
nengel@2 213
nengel@2 214 static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size, const uint8_t *jvt_list, const uint8_t *fallback_list){
nengel@2 215 int i, last = 8, next = 8;
nengel@2 216 const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
nengel@2 217 if(!get_bits1(gb)) /* matrix not written, we use the predicted one */
nengel@2 218 memcpy(factors, fallback_list, size*sizeof(uint8_t));
nengel@2 219 else
nengel@2 220 for(i=0;i<size;i++){
nengel@2 221 if(next)
nengel@2 222 next = (last + get_se_golomb(gb)) & 0xff;
nengel@2 223 if(!i && !next){ /* matrix not written, we use the preset one */
nengel@2 224 memcpy(factors, jvt_list, size*sizeof(uint8_t));
nengel@2 225 break;
nengel@2 226 }
nengel@2 227 last = factors[scan[i]] = next ? next : last;
nengel@2 228 }
nengel@2 229 }
nengel@2 230
nengel@2 231 static void decode_scaling_matrices(GetBitContext *gb, SPS *sps, PPS *pps, int is_sps,
nengel@2 232 uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
nengel@2 233 int fallback_sps = !is_sps && sps->scaling_matrix_present;
nengel@2 234 const uint8_t *fallback[4] = {
nengel@2 235 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
nengel@2 236 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
nengel@2 237 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
nengel@2 238 fallback_sps ? sps->scaling_matrix8[1] : default_scaling8[1]
nengel@2 239 };
nengel@2 240 if(get_bits1(gb)){
nengel@2 241 sps->scaling_matrix_present |= is_sps;
nengel@2 242 decode_scaling_list(gb, scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
nengel@2 243 decode_scaling_list(gb, scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
nengel@2 244 decode_scaling_list(gb, scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
nengel@2 245 decode_scaling_list(gb, scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
nengel@2 246 decode_scaling_list(gb, scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
nengel@2 247 decode_scaling_list(gb, scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
nengel@2 248 if(is_sps || pps->transform_8x8_mode){
nengel@2 249 decode_scaling_list(gb, scaling_matrix8[0],64,default_scaling8[0],fallback[2]); // Intra, Y
nengel@2 250 decode_scaling_list(gb, scaling_matrix8[1],64,default_scaling8[1],fallback[3]); // Inter, Y
nengel@2 251 }
nengel@2 252 }
nengel@2 253 }
nengel@2 254
nengel@2 255 int ff_h264_decode_seq_parameter_set(NalContext *n, GetBitContext *gb){
nengel@2 256 int profile_idc, level_idc;
nengel@2 257 unsigned int sps_id;
nengel@2 258 int i;
nengel@2 259 SPS *sps;
nengel@2 260
nengel@2 261 profile_idc= get_bits(gb, 8);
nengel@2 262 get_bits1(gb); //constraint_set0_flag
nengel@2 263 get_bits1(gb); //constraint_set1_flag
nengel@2 264 get_bits1(gb); //constraint_set2_flag
nengel@2 265 get_bits1(gb); //constraint_set3_flag
nengel@2 266 get_bits(gb, 4); // reserved
nengel@2 267 level_idc= get_bits(gb, 8);
nengel@2 268 sps_id= get_ue_golomb_31(gb);
nengel@2 269
nengel@2 270 if(sps_id >= MAX_SPS_COUNT) {
nengel@2 271 av_log(AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
nengel@2 272 return -1;
nengel@2 273 }
nengel@2 274 if (!n->sps_buffers[sps_id])
nengel@2 275 n->sps_buffers[sps_id]= av_mallocz(sizeof(SPS));
nengel@2 276
nengel@2 277 sps = n->sps_buffers[sps_id];
nengel@2 278 if(sps == NULL)
nengel@2 279 return -1;
nengel@2 280
nengel@2 281 sps->profile_idc= profile_idc;
nengel@2 282 sps->level_idc= level_idc;
nengel@2 283
nengel@2 284 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
nengel@2 285 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
nengel@2 286 sps->scaling_matrix_present = 0;
nengel@2 287
nengel@2 288 if(sps->profile_idc >= 100){ //high profile
nengel@2 289 sps->chroma_format_idc= get_ue_golomb_31(gb);
nengel@2 290 if(sps->chroma_format_idc == 3)
nengel@2 291 sps->residual_color_transform_flag = get_bits1(gb);
nengel@2 292 sps->bit_depth_luma = get_ue_golomb(gb) + 8;
nengel@2 293 sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
nengel@2 294 sps->transform_bypass = get_bits1(gb);
nengel@2 295 decode_scaling_matrices(gb, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
nengel@2 296 }else{
nengel@2 297 sps->chroma_format_idc= 1;
nengel@2 298 sps->bit_depth_luma = 8;
nengel@2 299 sps->bit_depth_chroma = 8;
nengel@2 300 }
nengel@2 301
nengel@2 302 sps->log2_max_frame_num= get_ue_golomb(gb) + 4;
nengel@2 303 sps->poc_type= get_ue_golomb_31(gb);
nengel@2 304
nengel@2 305 if(sps->poc_type == 0){ //FIXME #define
nengel@2 306 sps->log2_max_poc_lsb= get_ue_golomb(gb) + 4;
nengel@2 307 } else if(sps->poc_type == 1){//FIXME #define
nengel@2 308 sps->delta_pic_order_always_zero_flag= get_bits1(gb);
nengel@2 309 sps->offset_for_non_ref_pic= get_se_golomb(gb);
nengel@2 310 sps->offset_for_top_to_bottom_field= get_se_golomb(gb);
nengel@2 311 sps->poc_cycle_length = get_ue_golomb(gb);
nengel@2 312
nengel@2 313 if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
nengel@2 314 av_log(AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
nengel@2 315 goto fail;
nengel@2 316 }
nengel@2 317
nengel@2 318 for(i=0; i<sps->poc_cycle_length; i++)
nengel@2 319 sps->offset_for_ref_frame[i]= get_se_golomb(gb);
nengel@2 320 }else if(sps->poc_type != 2){
nengel@2 321 av_log(AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
nengel@2 322 goto fail;
nengel@2 323 }
nengel@2 324
nengel@2 325 sps->ref_frame_count= get_ue_golomb_31(gb);
nengel@2 326 if(sps->ref_frame_count >= 32){
nengel@2 327 av_log(AV_LOG_ERROR, "too many reference frames\n");
nengel@2 328 goto fail;
nengel@2 329 }
nengel@2 330 sps->gaps_in_frame_num_allowed_flag= get_bits1(gb);
nengel@2 331 sps->mb_width = get_ue_golomb(gb) + 1;
nengel@2 332 sps->mb_height= get_ue_golomb(gb) + 1;
nengel@2 333
nengel@2 334
nengel@2 335 sps->frame_mbs_only_flag= get_bits1(gb);
nengel@2 336 if(!sps->frame_mbs_only_flag){
nengel@2 337 av_log(AV_LOG_ERROR, "MBAFF support not included\n");
nengel@2 338 get_bits1(gb);
nengel@2 339 }else
nengel@2 340 sps->mb_aff= 0;
nengel@2 341
nengel@2 342 sps->direct_8x8_inference_flag= get_bits1(gb);
nengel@2 343 if(!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag){
nengel@2 344 av_log(AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
nengel@2 345 goto fail;
nengel@2 346 }
nengel@2 347
nengel@2 348 sps->crop= get_bits1(gb);
nengel@2 349 if(sps->crop){
nengel@2 350 sps->crop_left = get_ue_golomb(gb);
nengel@2 351 sps->crop_right = get_ue_golomb(gb);
nengel@2 352 sps->crop_top = get_ue_golomb(gb);
nengel@2 353 sps->crop_bottom= get_ue_golomb(gb);
nengel@2 354 if(sps->crop_left || sps->crop_top){
nengel@2 355 av_log( AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
nengel@2 356 }
nengel@2 357 if(sps->crop_right >= 8 || sps->crop_bottom >= (8>> !sps->frame_mbs_only_flag)){
nengel@2 358 av_log( AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
nengel@2 359 }
nengel@2 360 }else {
nengel@2 361
nengel@2 362 sps->crop_left =
nengel@2 363 sps->crop_right =
nengel@2 364 sps->crop_top =
nengel@2 365 sps->crop_bottom= 0;
nengel@2 366 }
nengel@2 367
nengel@2 368 sps->vui_parameters_present_flag= get_bits1(gb);
nengel@2 369 if( sps->vui_parameters_present_flag )
nengel@2 370 if (decode_vui_parameters(gb, sps) < 0)
nengel@2 371 goto fail;
nengel@2 372
nengel@2 373
nengel@2 374 n->sps = *sps;
nengel@2 375
nengel@2 376 if( sps->bitstream_restriction_flag){
nengel@2 377 n->has_b_frames = sps->num_reorder_frames;
nengel@2 378 }
nengel@2 379 else
nengel@2 380 n->has_b_frames= MAX_DELAYED_PIC_COUNT;
nengel@2 381
nengel@2 382 return 0;
nengel@2 383 fail:
nengel@2 384 av_free(sps);
nengel@2 385 return -1;
nengel@2 386 }
nengel@2 387
nengel@2 388 static void
nengel@2 389 build_qp_table(PPS *pps, int t, int index)
nengel@2 390 {
nengel@2 391 int i;
nengel@2 392 for(i = 0; i < 52; i++)
nengel@2 393 pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[av_clip(i + index, 0, 51)];
nengel@2 394 }
nengel@2 395
nengel@2 396 int ff_h264_decode_picture_parameter_set(NalContext *n, GetBitContext *gb, int bit_length){
nengel@2 397 unsigned int pps_id= get_ue_golomb(gb);
nengel@2 398 PPS *pps;
nengel@2 399
nengel@2 400 if(pps_id >= MAX_PPS_COUNT) {
nengel@2 401 av_log(AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
nengel@2 402 return -1;
nengel@2 403 }
nengel@2 404 if (!n->pps_buffers[pps_id])
nengel@2 405 n->pps_buffers[pps_id]= av_mallocz(sizeof(PPS));
nengel@2 406 pps = n->pps_buffers[pps_id];
nengel@2 407 if(pps == NULL)
nengel@2 408 return -1;
nengel@2 409 pps->sps_id= get_ue_golomb_31(gb);
nengel@2 410 if((unsigned)pps->sps_id>=MAX_SPS_COUNT || n->sps_buffers[pps->sps_id] == NULL){
nengel@2 411 av_log(AV_LOG_ERROR, "sps_id out of range\n");
nengel@2 412 goto fail;
nengel@2 413 }
nengel@2 414
nengel@2 415 pps->cabac= get_bits1(gb);
nengel@2 416 pps->pic_order_present= get_bits1(gb);
nengel@2 417 if(pps->pic_order_present){
nengel@2 418 av_log(AV_LOG_ERROR, "no interlaces support\n");
nengel@2 419 }
nengel@2 420 pps->slice_group_count= get_ue_golomb(gb) + 1;
nengel@2 421 if(pps->slice_group_count > 1 ){
nengel@2 422 pps->mb_slice_group_map_type= get_ue_golomb(gb);
nengel@2 423 av_log(AV_LOG_ERROR, "multiple slices not supported\n");
nengel@2 424 }
nengel@2 425 pps->ref_count[0]= get_ue_golomb(gb) + 1;
nengel@2 426 pps->ref_count[1]= get_ue_golomb(gb) + 1;
nengel@2 427 if(pps->ref_count[0]> 32 || pps->ref_count[1]> 32){
nengel@2 428 av_log(AV_LOG_ERROR, "reference overflow (pps)\n");
nengel@2 429 goto fail;
nengel@2 430 }
nengel@2 431
nengel@2 432 pps->weighted_pred= get_bits1(gb);
nengel@2 433 pps->weighted_bipred_idc= get_bits(gb, 2);
nengel@2 434 pps->init_qp= get_se_golomb(gb) + 26;
nengel@2 435 pps->init_qs= get_se_golomb(gb) + 26;
nengel@2 436 pps->chroma_qp_index_offset[0]= get_se_golomb(gb);
nengel@2 437 pps->deblocking_filter_parameters_present= get_bits1(gb);
nengel@2 438 pps->constrained_intra_pred= get_bits1(gb);
nengel@2 439 pps->redundant_pic_cnt_present = get_bits1(gb);
nengel@2 440
nengel@2 441 pps->transform_8x8_mode= 0;
nengel@2 442 memcpy(pps->scaling_matrix4, n->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
nengel@2 443 memcpy(pps->scaling_matrix8, n->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
nengel@2 444
nengel@2 445 if(get_bits_count(gb) < bit_length){
nengel@2 446 pps->transform_8x8_mode= get_bits1(gb);
nengel@2 447 decode_scaling_matrices(gb, n->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
nengel@2 448 pps->chroma_qp_index_offset[1]= get_se_golomb(gb); //second_chroma_qp_index_offset
nengel@2 449 } else {
nengel@2 450 pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
nengel@2 451 }
nengel@2 452
nengel@2 453 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0]);
nengel@2 454 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1]);
nengel@2 455 if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
nengel@2 456 pps->chroma_qp_diff= 1;
nengel@2 457
nengel@2 458 return 0;
nengel@2 459 fail:
nengel@2 460 av_free(pps);
nengel@2 461 return -1;
nengel@2 462 }