670 lines
25 KiB
C
670 lines
25 KiB
C
/*
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* H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* H.264 / AVC / MPEG4 part10 parameter set decoding.
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#include "libavutil/imgutils.h"
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#include "internal.h"
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#include "dsputil.h"
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#include "avcodec.h"
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#include "h264.h"
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#include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan)
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#include "golomb.h"
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//#undef NDEBUG
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#include <assert.h>
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static const AVRational pixel_aspect[17]={
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{0, 1},
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{1, 1},
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{12, 11},
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{10, 11},
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{16, 11},
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{40, 33},
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{24, 11},
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{20, 11},
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{32, 11},
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{80, 33},
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{18, 11},
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{15, 11},
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{64, 33},
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{160,99},
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{4, 3},
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{3, 2},
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{2, 1},
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};
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#define QP(qP,depth) ( (qP)+6*((depth)-8) )
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#define CHROMA_QP_TABLE_END(d) \
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QP(0,d), QP(1,d), QP(2,d), QP(3,d), QP(4,d), QP(5,d),\
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QP(6,d), QP(7,d), QP(8,d), QP(9,d), QP(10,d), QP(11,d),\
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QP(12,d), QP(13,d), QP(14,d), QP(15,d), QP(16,d), QP(17,d),\
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QP(18,d), QP(19,d), QP(20,d), QP(21,d), QP(22,d), QP(23,d),\
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QP(24,d), QP(25,d), QP(26,d), QP(27,d), QP(28,d), QP(29,d),\
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QP(29,d), QP(30,d), QP(31,d), QP(32,d), QP(32,d), QP(33,d),\
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QP(34,d), QP(34,d), QP(35,d), QP(35,d), QP(36,d), QP(36,d),\
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QP(37,d), QP(37,d), QP(37,d), QP(38,d), QP(38,d), QP(38,d),\
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QP(39,d), QP(39,d), QP(39,d), QP(39,d)
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const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM+1] = {
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{
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CHROMA_QP_TABLE_END(8)
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},
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{
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0, 1, 2, 3, 4, 5,
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CHROMA_QP_TABLE_END(9)
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},
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{
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0, 1, 2, 3, 4, 5,
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6, 7, 8, 9, 10, 11,
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CHROMA_QP_TABLE_END(10)
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},
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{
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0, 1, 2, 3, 4, 5,
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6, 7, 8, 9, 10, 11,
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12,13,14,15, 16, 17,
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CHROMA_QP_TABLE_END(11)
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},
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{
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0, 1, 2, 3, 4, 5,
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6, 7, 8, 9, 10, 11,
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12,13,14,15, 16, 17,
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18,19,20,21, 22, 23,
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CHROMA_QP_TABLE_END(12)
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},
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{
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0, 1, 2, 3, 4, 5,
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6, 7, 8, 9, 10, 11,
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12,13,14,15, 16, 17,
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18,19,20,21, 22, 23,
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24,25,26,27, 28, 29,
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CHROMA_QP_TABLE_END(13)
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},
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{
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0, 1, 2, 3, 4, 5,
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6, 7, 8, 9, 10, 11,
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12,13,14,15, 16, 17,
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18,19,20,21, 22, 23,
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24,25,26,27, 28, 29,
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30,31,32,33, 34, 35,
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CHROMA_QP_TABLE_END(14)
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},
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};
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static const uint8_t default_scaling4[2][16]={
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{ 6,13,20,28,
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13,20,28,32,
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20,28,32,37,
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28,32,37,42
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},{
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10,14,20,24,
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14,20,24,27,
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20,24,27,30,
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24,27,30,34
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}};
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static const uint8_t default_scaling8[2][64]={
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{ 6,10,13,16,18,23,25,27,
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10,11,16,18,23,25,27,29,
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13,16,18,23,25,27,29,31,
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16,18,23,25,27,29,31,33,
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18,23,25,27,29,31,33,36,
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23,25,27,29,31,33,36,38,
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25,27,29,31,33,36,38,40,
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27,29,31,33,36,38,40,42
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},{
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9,13,15,17,19,21,22,24,
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13,13,17,19,21,22,24,25,
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15,17,19,21,22,24,25,27,
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17,19,21,22,24,25,27,28,
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19,21,22,24,25,27,28,30,
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21,22,24,25,27,28,30,32,
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22,24,25,27,28,30,32,33,
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24,25,27,28,30,32,33,35
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}};
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static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
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MpegEncContext * const s = &h->s;
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int cpb_count, i;
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cpb_count = get_ue_golomb_31(&s->gb) + 1;
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if(cpb_count > 32U){
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av_log(h->s.avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
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return -1;
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}
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get_bits(&s->gb, 4); /* bit_rate_scale */
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get_bits(&s->gb, 4); /* cpb_size_scale */
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for(i=0; i<cpb_count; i++){
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get_ue_golomb_long(&s->gb); /* bit_rate_value_minus1 */
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get_ue_golomb_long(&s->gb); /* cpb_size_value_minus1 */
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get_bits1(&s->gb); /* cbr_flag */
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}
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sps->initial_cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
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sps->cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
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sps->dpb_output_delay_length = get_bits(&s->gb, 5) + 1;
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sps->time_offset_length = get_bits(&s->gb, 5);
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sps->cpb_cnt = cpb_count;
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return 0;
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}
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static inline int decode_vui_parameters(H264Context *h, SPS *sps){
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MpegEncContext * const s = &h->s;
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int aspect_ratio_info_present_flag;
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unsigned int aspect_ratio_idc;
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aspect_ratio_info_present_flag= get_bits1(&s->gb);
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if( aspect_ratio_info_present_flag ) {
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aspect_ratio_idc= get_bits(&s->gb, 8);
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if( aspect_ratio_idc == EXTENDED_SAR ) {
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sps->sar.num= get_bits(&s->gb, 16);
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sps->sar.den= get_bits(&s->gb, 16);
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}else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
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sps->sar= pixel_aspect[aspect_ratio_idc];
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}else{
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av_log(h->s.avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
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return -1;
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}
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}else{
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sps->sar.num=
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sps->sar.den= 0;
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}
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// s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);
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if(get_bits1(&s->gb)){ /* overscan_info_present_flag */
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get_bits1(&s->gb); /* overscan_appropriate_flag */
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}
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sps->video_signal_type_present_flag = get_bits1(&s->gb);
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if(sps->video_signal_type_present_flag){
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get_bits(&s->gb, 3); /* video_format */
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sps->full_range = get_bits1(&s->gb); /* video_full_range_flag */
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sps->colour_description_present_flag = get_bits1(&s->gb);
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if(sps->colour_description_present_flag){
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sps->color_primaries = get_bits(&s->gb, 8); /* colour_primaries */
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sps->color_trc = get_bits(&s->gb, 8); /* transfer_characteristics */
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sps->colorspace = get_bits(&s->gb, 8); /* matrix_coefficients */
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if (sps->color_primaries >= AVCOL_PRI_NB)
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sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
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if (sps->color_trc >= AVCOL_TRC_NB)
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sps->color_trc = AVCOL_TRC_UNSPECIFIED;
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if (sps->colorspace >= AVCOL_SPC_NB)
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sps->colorspace = AVCOL_SPC_UNSPECIFIED;
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}
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}
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if(get_bits1(&s->gb)){ /* chroma_location_info_present_flag */
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s->avctx->chroma_sample_location = get_ue_golomb(&s->gb)+1; /* chroma_sample_location_type_top_field */
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get_ue_golomb(&s->gb); /* chroma_sample_location_type_bottom_field */
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}
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sps->timing_info_present_flag = get_bits1(&s->gb);
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if(sps->timing_info_present_flag){
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sps->num_units_in_tick = get_bits_long(&s->gb, 32);
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sps->time_scale = get_bits_long(&s->gb, 32);
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if(!sps->num_units_in_tick || !sps->time_scale){
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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);
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return -1;
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}
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sps->fixed_frame_rate_flag = get_bits1(&s->gb);
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}
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sps->nal_hrd_parameters_present_flag = get_bits1(&s->gb);
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if(sps->nal_hrd_parameters_present_flag)
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if(decode_hrd_parameters(h, sps) < 0)
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return -1;
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sps->vcl_hrd_parameters_present_flag = get_bits1(&s->gb);
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if(sps->vcl_hrd_parameters_present_flag)
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if(decode_hrd_parameters(h, sps) < 0)
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return -1;
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if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
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get_bits1(&s->gb); /* low_delay_hrd_flag */
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sps->pic_struct_present_flag = get_bits1(&s->gb);
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if(!get_bits_left(&s->gb))
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return 0;
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sps->bitstream_restriction_flag = get_bits1(&s->gb);
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if(sps->bitstream_restriction_flag){
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get_bits1(&s->gb); /* motion_vectors_over_pic_boundaries_flag */
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get_ue_golomb(&s->gb); /* max_bytes_per_pic_denom */
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get_ue_golomb(&s->gb); /* max_bits_per_mb_denom */
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get_ue_golomb(&s->gb); /* log2_max_mv_length_horizontal */
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get_ue_golomb(&s->gb); /* log2_max_mv_length_vertical */
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sps->num_reorder_frames= get_ue_golomb(&s->gb);
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get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/
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if (get_bits_left(&s->gb) < 0) {
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sps->num_reorder_frames=0;
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sps->bitstream_restriction_flag= 0;
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}
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if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
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av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
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return -1;
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}
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}
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if (get_bits_left(&s->gb) < 0) {
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av_log(h->s.avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", -get_bits_left(&s->gb));
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return AVERROR_INVALIDDATA;
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}
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return 0;
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}
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static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
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const uint8_t *jvt_list, const uint8_t *fallback_list){
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MpegEncContext * const s = &h->s;
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int i, last = 8, next = 8;
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const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
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if(!get_bits1(&s->gb)) /* matrix not written, we use the predicted one */
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memcpy(factors, fallback_list, size*sizeof(uint8_t));
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else
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for(i=0;i<size;i++){
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if(next)
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next = (last + get_se_golomb(&s->gb)) & 0xff;
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if(!i && !next){ /* matrix not written, we use the preset one */
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memcpy(factors, jvt_list, size*sizeof(uint8_t));
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break;
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}
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last = factors[scan[i]] = next ? next : last;
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}
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}
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static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
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uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
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MpegEncContext * const s = &h->s;
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int fallback_sps = !is_sps && sps->scaling_matrix_present;
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const uint8_t *fallback[4] = {
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fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
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fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
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fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
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fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
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};
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if(get_bits1(&s->gb)){
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sps->scaling_matrix_present |= is_sps;
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decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
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decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
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decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
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decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
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decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
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decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
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if(is_sps || pps->transform_8x8_mode){
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decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]); // Intra, Y
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decode_scaling_list(h,scaling_matrix8[3],64,default_scaling8[1],fallback[3]); // Inter, Y
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if(sps->chroma_format_idc == 3){
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decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[0],scaling_matrix8[0]); // Intra, Cr
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decode_scaling_list(h,scaling_matrix8[4],64,default_scaling8[1],scaling_matrix8[3]); // Inter, Cr
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decode_scaling_list(h,scaling_matrix8[2],64,default_scaling8[0],scaling_matrix8[1]); // Intra, Cb
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decode_scaling_list(h,scaling_matrix8[5],64,default_scaling8[1],scaling_matrix8[4]); // Inter, Cb
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}
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}
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}
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}
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int ff_h264_decode_seq_parameter_set(H264Context *h){
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MpegEncContext * const s = &h->s;
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int profile_idc, level_idc, constraint_set_flags = 0;
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unsigned int sps_id;
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int i;
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SPS *sps;
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profile_idc= get_bits(&s->gb, 8);
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constraint_set_flags |= get_bits1(&s->gb) << 0; //constraint_set0_flag
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constraint_set_flags |= get_bits1(&s->gb) << 1; //constraint_set1_flag
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constraint_set_flags |= get_bits1(&s->gb) << 2; //constraint_set2_flag
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constraint_set_flags |= get_bits1(&s->gb) << 3; //constraint_set3_flag
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constraint_set_flags |= get_bits1(&s->gb) << 4; //constraint_set4_flag
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constraint_set_flags |= get_bits1(&s->gb) << 5; //constraint_set5_flag
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get_bits(&s->gb, 2); // reserved
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level_idc= get_bits(&s->gb, 8);
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sps_id= get_ue_golomb_31(&s->gb);
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if(sps_id >= MAX_SPS_COUNT) {
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av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
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return -1;
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}
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sps= av_mallocz(sizeof(SPS));
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if(sps == NULL)
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return -1;
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sps->time_offset_length = 24;
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sps->profile_idc= profile_idc;
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sps->constraint_set_flags = constraint_set_flags;
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sps->level_idc= level_idc;
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sps->full_range = -1;
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memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
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memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
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sps->scaling_matrix_present = 0;
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sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
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if(sps->profile_idc == 100 || sps->profile_idc == 110 ||
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sps->profile_idc == 122 || sps->profile_idc == 244 || sps->profile_idc == 44 ||
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sps->profile_idc == 83 || sps->profile_idc == 86 || sps->profile_idc == 118 ||
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sps->profile_idc == 128 || sps->profile_idc == 144) {
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sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
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if (sps->chroma_format_idc > 3U) {
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av_log(h->s.avctx, AV_LOG_ERROR, "chroma_format_idc %d is illegal\n", sps->chroma_format_idc);
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goto fail;
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} else if(sps->chroma_format_idc == 3) {
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sps->residual_color_transform_flag = get_bits1(&s->gb);
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if(sps->residual_color_transform_flag) {
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av_log(h->s.avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
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goto fail;
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}
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}
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sps->bit_depth_luma = get_ue_golomb(&s->gb) + 8;
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sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
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if (sps->bit_depth_luma > 14U || sps->bit_depth_chroma > 14U) {
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av_log(h->s.avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
|
|
sps->bit_depth_luma, sps->bit_depth_chroma);
|
|
goto fail;
|
|
}
|
|
sps->transform_bypass = get_bits1(&s->gb);
|
|
decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
|
|
}else{
|
|
sps->chroma_format_idc= 1;
|
|
sps->bit_depth_luma = 8;
|
|
sps->bit_depth_chroma = 8;
|
|
}
|
|
|
|
sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
|
|
if (sps->log2_max_frame_num < 4 || sps->log2_max_frame_num > 16) {
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "illegal log2_max_frame_num %d\n",
|
|
sps->log2_max_frame_num);
|
|
goto fail;
|
|
}
|
|
|
|
sps->poc_type= get_ue_golomb_31(&s->gb);
|
|
|
|
if(sps->poc_type == 0){ //FIXME #define
|
|
unsigned t = get_ue_golomb(&s->gb);
|
|
if(t>12){
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
|
|
goto fail;
|
|
}
|
|
sps->log2_max_poc_lsb= t + 4;
|
|
} else if(sps->poc_type == 1){//FIXME #define
|
|
sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
|
|
sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
|
|
sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
|
|
sps->poc_cycle_length = get_ue_golomb(&s->gb);
|
|
|
|
if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
|
|
goto fail;
|
|
}
|
|
|
|
for(i=0; i<sps->poc_cycle_length; i++)
|
|
sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
|
|
}else if(sps->poc_type != 2){
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
|
|
goto fail;
|
|
}
|
|
|
|
sps->ref_frame_count= get_ue_golomb_31(&s->gb);
|
|
if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count > 16U){
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
|
|
goto fail;
|
|
}
|
|
sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
|
|
sps->mb_width = get_ue_golomb(&s->gb) + 1;
|
|
sps->mb_height= get_ue_golomb(&s->gb) + 1;
|
|
if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
|
|
av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->s.avctx)){
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
|
|
goto fail;
|
|
}
|
|
|
|
sps->frame_mbs_only_flag= get_bits1(&s->gb);
|
|
if(!sps->frame_mbs_only_flag)
|
|
sps->mb_aff= get_bits1(&s->gb);
|
|
else
|
|
sps->mb_aff= 0;
|
|
|
|
sps->direct_8x8_inference_flag= get_bits1(&s->gb);
|
|
|
|
#ifndef ALLOW_INTERLACE
|
|
if(sps->mb_aff)
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
|
|
#endif
|
|
sps->crop= get_bits1(&s->gb);
|
|
if(sps->crop){
|
|
int crop_vertical_limit = sps->chroma_format_idc & 2 ? 16 : 8;
|
|
int crop_horizontal_limit = sps->chroma_format_idc == 3 ? 16 : 8;
|
|
sps->crop_left = get_ue_golomb(&s->gb);
|
|
sps->crop_right = get_ue_golomb(&s->gb);
|
|
sps->crop_top = get_ue_golomb(&s->gb);
|
|
sps->crop_bottom= get_ue_golomb(&s->gb);
|
|
if(sps->crop_left || sps->crop_top){
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ... (left: %d, top: %d)\n", sps->crop_left, sps->crop_top);
|
|
}
|
|
if(sps->crop_right >= crop_horizontal_limit || sps->crop_bottom >= crop_vertical_limit){
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, cropping disabled (right: %d, bottom: %d)\n", sps->crop_right, sps->crop_bottom);
|
|
/* It is very unlikely that partial cropping will make anybody happy.
|
|
* Not cropping at all fixes for example playback of Sisvel 3D streams
|
|
* in applications supporting Sisvel 3D. */
|
|
sps->crop_left =
|
|
sps->crop_right =
|
|
sps->crop_top =
|
|
sps->crop_bottom= 0;
|
|
}
|
|
}else{
|
|
sps->crop_left =
|
|
sps->crop_right =
|
|
sps->crop_top =
|
|
sps->crop_bottom= 0;
|
|
}
|
|
|
|
sps->vui_parameters_present_flag= get_bits1(&s->gb);
|
|
if( sps->vui_parameters_present_flag )
|
|
if (decode_vui_parameters(h, sps) < 0)
|
|
goto fail;
|
|
|
|
if(!sps->sar.den)
|
|
sps->sar.den= 1;
|
|
|
|
if(s->avctx->debug&FF_DEBUG_PICT_INFO){
|
|
static const char csp[4][5] = { "Gray", "420", "422", "444" };
|
|
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 b%d reo:%d\n",
|
|
sps_id, sps->profile_idc, sps->level_idc,
|
|
sps->poc_type,
|
|
sps->ref_frame_count,
|
|
sps->mb_width, sps->mb_height,
|
|
sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
|
|
sps->direct_8x8_inference_flag ? "8B8" : "",
|
|
sps->crop_left, sps->crop_right,
|
|
sps->crop_top, sps->crop_bottom,
|
|
sps->vui_parameters_present_flag ? "VUI" : "",
|
|
csp[sps->chroma_format_idc],
|
|
sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
|
|
sps->timing_info_present_flag ? sps->time_scale : 0,
|
|
sps->bit_depth_luma,
|
|
h->sps.bitstream_restriction_flag ? sps->num_reorder_frames : -1
|
|
);
|
|
}
|
|
|
|
av_free(h->sps_buffers[sps_id]);
|
|
h->sps_buffers[sps_id]= sps;
|
|
h->sps = *sps;
|
|
return 0;
|
|
fail:
|
|
av_free(sps);
|
|
return -1;
|
|
}
|
|
|
|
static void
|
|
build_qp_table(PPS *pps, int t, int index, const int depth)
|
|
{
|
|
int i;
|
|
const int max_qp = 51 + 6*(depth-8);
|
|
for(i = 0; i < max_qp+1; i++)
|
|
pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[depth-8][av_clip(i + index, 0, max_qp)];
|
|
}
|
|
|
|
static int more_rbsp_data_in_pps(H264Context *h, PPS *pps)
|
|
{
|
|
const SPS *sps = h->sps_buffers[pps->sps_id];
|
|
int profile_idc = sps->profile_idc;
|
|
|
|
if ((profile_idc == 66 || profile_idc == 77 ||
|
|
profile_idc == 88) && (sps->constraint_set_flags & 7)) {
|
|
av_log(h->s.avctx, AV_LOG_VERBOSE,
|
|
"Current profile doesn't provide more RBSP data in PPS, skipping\n");
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
|
|
MpegEncContext * const s = &h->s;
|
|
unsigned int pps_id= get_ue_golomb(&s->gb);
|
|
PPS *pps;
|
|
const int qp_bd_offset = 6*(h->sps.bit_depth_luma-8);
|
|
int bits_left;
|
|
|
|
if(pps_id >= MAX_PPS_COUNT) {
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
|
|
return -1;
|
|
} else if (h->sps.bit_depth_luma > 14) {
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "Invalid luma bit depth=%d\n", h->sps.bit_depth_luma);
|
|
return AVERROR_INVALIDDATA;
|
|
} else if (h->sps.bit_depth_luma == 11 || h->sps.bit_depth_luma == 13) {
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "Unimplemented luma bit depth=%d\n", h->sps.bit_depth_luma);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
pps= av_mallocz(sizeof(PPS));
|
|
if(pps == NULL)
|
|
return -1;
|
|
pps->sps_id= get_ue_golomb_31(&s->gb);
|
|
if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
|
|
goto fail;
|
|
}
|
|
|
|
pps->cabac= get_bits1(&s->gb);
|
|
pps->pic_order_present= get_bits1(&s->gb);
|
|
pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
|
|
if(pps->slice_group_count > 1 ){
|
|
pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
|
|
switch(pps->mb_slice_group_map_type){
|
|
case 0:
|
|
#if 0
|
|
| for( i = 0; i <= num_slice_groups_minus1; i++ ) | | |
|
|
| run_length[ i ] |1 |ue(v) |
|
|
#endif
|
|
break;
|
|
case 2:
|
|
#if 0
|
|
| for( i = 0; i < num_slice_groups_minus1; i++ ) | | |
|
|
|{ | | |
|
|
| top_left_mb[ i ] |1 |ue(v) |
|
|
| bottom_right_mb[ i ] |1 |ue(v) |
|
|
| } | | |
|
|
#endif
|
|
break;
|
|
case 3:
|
|
case 4:
|
|
case 5:
|
|
#if 0
|
|
| slice_group_change_direction_flag |1 |u(1) |
|
|
| slice_group_change_rate_minus1 |1 |ue(v) |
|
|
#endif
|
|
break;
|
|
case 6:
|
|
#if 0
|
|
| slice_group_id_cnt_minus1 |1 |ue(v) |
|
|
| for( i = 0; i <= slice_group_id_cnt_minus1; i++ | | |
|
|
|) | | |
|
|
| slice_group_id[ i ] |1 |u(v) |
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
|
|
pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
|
|
if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
|
|
goto fail;
|
|
}
|
|
|
|
pps->weighted_pred= get_bits1(&s->gb);
|
|
pps->weighted_bipred_idc= get_bits(&s->gb, 2);
|
|
pps->init_qp= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
|
|
pps->init_qs= get_se_golomb(&s->gb) + 26 + qp_bd_offset;
|
|
pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
|
|
pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
|
|
pps->constrained_intra_pred= get_bits1(&s->gb);
|
|
pps->redundant_pic_cnt_present = get_bits1(&s->gb);
|
|
|
|
pps->transform_8x8_mode= 0;
|
|
h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
|
|
memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
|
|
memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
|
|
|
|
bits_left = bit_length - get_bits_count(&s->gb);
|
|
if(bits_left > 0 && more_rbsp_data_in_pps(h, pps)){
|
|
pps->transform_8x8_mode= get_bits1(&s->gb);
|
|
decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
|
|
pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
|
|
} else {
|
|
pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
|
|
}
|
|
|
|
build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], h->sps.bit_depth_luma);
|
|
build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], h->sps.bit_depth_luma);
|
|
if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
|
|
pps->chroma_qp_diff= 1;
|
|
|
|
if(s->avctx->debug&FF_DEBUG_PICT_INFO){
|
|
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",
|
|
pps_id, pps->sps_id,
|
|
pps->cabac ? "CABAC" : "CAVLC",
|
|
pps->slice_group_count,
|
|
pps->ref_count[0], pps->ref_count[1],
|
|
pps->weighted_pred ? "weighted" : "",
|
|
pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
|
|
pps->deblocking_filter_parameters_present ? "LPAR" : "",
|
|
pps->constrained_intra_pred ? "CONSTR" : "",
|
|
pps->redundant_pic_cnt_present ? "REDU" : "",
|
|
pps->transform_8x8_mode ? "8x8DCT" : ""
|
|
);
|
|
}
|
|
|
|
av_free(h->pps_buffers[pps_id]);
|
|
h->pps_buffers[pps_id]= pps;
|
|
return 0;
|
|
fail:
|
|
av_free(pps);
|
|
return -1;
|
|
}
|