865 lines
32 KiB
C
865 lines
32 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 / MPEG-4 part10 parameter set decoding.
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#include <inttypes.h>
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#include "libavutil/imgutils.h"
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#include "internal.h"
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#include "mathops.h"
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#include "avcodec.h"
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#include "h264data.h"
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#include "h264_ps.h"
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#include "golomb.h"
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#define MAX_LOG2_MAX_FRAME_NUM (12 + 4)
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#define MIN_LOG2_MAX_FRAME_NUM 4
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#define EXTENDED_SAR 255
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static const uint8_t default_scaling4[2][16] = {
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{ 6, 13, 20, 28, 13, 20, 28, 32,
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20, 28, 32, 37, 28, 32, 37, 42 },
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{ 10, 14, 20, 24, 14, 20, 24, 27,
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20, 24, 27, 30, 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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{ 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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/* maximum number of MBs in the DPB for a given level */
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static const int level_max_dpb_mbs[][2] = {
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{ 10, 396 },
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{ 11, 900 },
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{ 12, 2376 },
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{ 13, 2376 },
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{ 20, 2376 },
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{ 21, 4752 },
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{ 22, 8100 },
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{ 30, 8100 },
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{ 31, 18000 },
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{ 32, 20480 },
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{ 40, 32768 },
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{ 41, 32768 },
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{ 42, 34816 },
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{ 50, 110400 },
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{ 51, 184320 },
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{ 52, 184320 },
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};
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static void remove_pps(H264ParamSets *s, int id)
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{
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av_buffer_unref(&s->pps_list[id]);
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}
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static void remove_sps(H264ParamSets *s, int id)
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{
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#if 0
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int i;
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if (s->sps_list[id]) {
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/* drop all PPS that depend on this SPS */
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for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
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if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
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remove_pps(s, i);
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}
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#endif
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av_buffer_unref(&s->sps_list[id]);
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}
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static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
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SPS *sps)
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{
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int cpb_count, i;
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cpb_count = get_ue_golomb_31(gb) + 1;
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if (cpb_count > 32U) {
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av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
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return AVERROR_INVALIDDATA;
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}
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get_bits(gb, 4); /* bit_rate_scale */
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get_bits(gb, 4); /* cpb_size_scale */
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for (i = 0; i < cpb_count; i++) {
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get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
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get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
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get_bits1(gb); /* cbr_flag */
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}
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sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
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sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
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sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
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sps->time_offset_length = get_bits(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(GetBitContext *gb, AVCodecContext *avctx,
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SPS *sps)
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{
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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(gb);
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if (aspect_ratio_info_present_flag) {
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aspect_ratio_idc = get_bits(gb, 8);
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if (aspect_ratio_idc == EXTENDED_SAR) {
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sps->sar.num = get_bits(gb, 16);
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sps->sar.den = get_bits(gb, 16);
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} else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
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sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
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} else {
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av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
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return AVERROR_INVALIDDATA;
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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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if (get_bits1(gb)) /* overscan_info_present_flag */
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get_bits1(gb); /* overscan_appropriate_flag */
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sps->video_signal_type_present_flag = get_bits1(gb);
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if (sps->video_signal_type_present_flag) {
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get_bits(gb, 3); /* video_format */
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sps->full_range = get_bits1(gb); /* video_full_range_flag */
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sps->colour_description_present_flag = get_bits1(gb);
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if (sps->colour_description_present_flag) {
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sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
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sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
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sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
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// Set invalid values to "unspecified"
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if (!av_color_primaries_name(sps->color_primaries))
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sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
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if (!av_color_transfer_name(sps->color_trc))
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sps->color_trc = AVCOL_TRC_UNSPECIFIED;
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if (!av_color_space_name(sps->colorspace))
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sps->colorspace = AVCOL_SPC_UNSPECIFIED;
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}
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}
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/* chroma_location_info_present_flag */
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if (get_bits1(gb)) {
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/* chroma_sample_location_type_top_field */
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avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
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get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
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}
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if (show_bits1(gb) && get_bits_left(gb) < 10) {
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av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
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return 0;
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}
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sps->timing_info_present_flag = get_bits1(gb);
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if (sps->timing_info_present_flag) {
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unsigned num_units_in_tick = get_bits_long(gb, 32);
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unsigned time_scale = get_bits_long(gb, 32);
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if (!num_units_in_tick || !time_scale) {
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av_log(avctx, AV_LOG_ERROR,
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"time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
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time_scale, num_units_in_tick);
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sps->timing_info_present_flag = 0;
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} else {
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sps->num_units_in_tick = num_units_in_tick;
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sps->time_scale = time_scale;
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}
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sps->fixed_frame_rate_flag = get_bits1(gb);
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}
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sps->nal_hrd_parameters_present_flag = get_bits1(gb);
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if (sps->nal_hrd_parameters_present_flag)
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if (decode_hrd_parameters(gb, avctx, sps) < 0)
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return AVERROR_INVALIDDATA;
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sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
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if (sps->vcl_hrd_parameters_present_flag)
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if (decode_hrd_parameters(gb, avctx, sps) < 0)
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return AVERROR_INVALIDDATA;
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if (sps->nal_hrd_parameters_present_flag ||
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sps->vcl_hrd_parameters_present_flag)
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get_bits1(gb); /* low_delay_hrd_flag */
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sps->pic_struct_present_flag = get_bits1(gb);
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if (!get_bits_left(gb))
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return 0;
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sps->bitstream_restriction_flag = get_bits1(gb);
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if (sps->bitstream_restriction_flag) {
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get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
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get_ue_golomb(gb); /* max_bytes_per_pic_denom */
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get_ue_golomb(gb); /* max_bits_per_mb_denom */
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get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
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get_ue_golomb(gb); /* log2_max_mv_length_vertical */
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sps->num_reorder_frames = get_ue_golomb(gb);
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get_ue_golomb(gb); /*max_dec_frame_buffering*/
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if (get_bits_left(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
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/* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
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av_log(avctx, AV_LOG_ERROR,
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"Clipping illegal num_reorder_frames %d\n",
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sps->num_reorder_frames);
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sps->num_reorder_frames = 16;
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return AVERROR_INVALIDDATA;
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}
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}
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return 0;
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}
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static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
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const uint8_t *jvt_list,
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const uint8_t *fallback_list)
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{
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int i, last = 8, next = 8;
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const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
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if (!get_bits1(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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int v = get_se_golomb(gb);
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if (v < -128 || v > 127) {
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av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
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return AVERROR_INVALIDDATA;
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}
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next = (last + v) & 0xff;
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}
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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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return 0;
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}
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/* returns non zero if the provided SPS scaling matrix has been filled */
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static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
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const PPS *pps, int is_sps,
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uint8_t(*scaling_matrix4)[16],
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uint8_t(*scaling_matrix8)[64])
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{
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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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int ret = 0;
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if (get_bits1(gb)) {
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ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
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ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
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ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
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ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
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ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
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ret |= decode_scaling_list(gb, 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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ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
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ret |= decode_scaling_list(gb, 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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ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
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ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
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ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
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ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
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}
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}
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if (!ret)
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ret = is_sps;
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}
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return ret;
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}
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void ff_h264_ps_uninit(H264ParamSets *ps)
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{
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int i;
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for (i = 0; i < MAX_SPS_COUNT; i++)
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av_buffer_unref(&ps->sps_list[i]);
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for (i = 0; i < MAX_PPS_COUNT; i++)
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av_buffer_unref(&ps->pps_list[i]);
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av_buffer_unref(&ps->sps_ref);
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av_buffer_unref(&ps->pps_ref);
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ps->pps = NULL;
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ps->sps = NULL;
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}
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int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
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H264ParamSets *ps, int ignore_truncation)
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{
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AVBufferRef *sps_buf;
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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, log2_max_frame_num_minus4;
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SPS *sps;
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int ret;
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sps_buf = av_buffer_allocz(sizeof(*sps));
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if (!sps_buf)
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return AVERROR(ENOMEM);
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sps = (SPS*)sps_buf->data;
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sps->data_size = gb->buffer_end - gb->buffer;
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if (sps->data_size > sizeof(sps->data)) {
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av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
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sps->data_size = sizeof(sps->data);
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}
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memcpy(sps->data, gb->buffer, sps->data_size);
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profile_idc = get_bits(gb, 8);
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constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
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constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
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constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
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constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
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constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
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constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
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skip_bits(gb, 2); // reserved_zero_2bits
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level_idc = get_bits(gb, 8);
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sps_id = get_ue_golomb_31(gb);
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if (sps_id >= MAX_SPS_COUNT) {
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av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
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goto fail;
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}
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|
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sps->sps_id = sps_id;
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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 || // High profile
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sps->profile_idc == 110 || // High10 profile
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sps->profile_idc == 122 || // High422 profile
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sps->profile_idc == 244 || // High444 Predictive profile
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sps->profile_idc == 44 || // Cavlc444 profile
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sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
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sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
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sps->profile_idc == 118 || // Stereo High profile (MVC)
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sps->profile_idc == 128 || // Multiview High profile (MVC)
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sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
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sps->profile_idc == 144) { // old High444 profile
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sps->chroma_format_idc = get_ue_golomb_31(gb);
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if (sps->chroma_format_idc > 3U) {
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avpriv_request_sample(avctx, "chroma_format_idc %u",
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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(gb);
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if (sps->residual_color_transform_flag) {
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av_log(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(gb) + 8;
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sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
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if (sps->bit_depth_chroma != sps->bit_depth_luma) {
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avpriv_request_sample(avctx,
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"Different chroma and luma bit depth");
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goto fail;
|
|
}
|
|
if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
|
|
sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
|
|
av_log(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(gb);
|
|
ret = decode_scaling_matrices(gb, sps, NULL, 1,
|
|
sps->scaling_matrix4, sps->scaling_matrix8);
|
|
if (ret < 0)
|
|
goto fail;
|
|
sps->scaling_matrix_present |= ret;
|
|
} else {
|
|
sps->chroma_format_idc = 1;
|
|
sps->bit_depth_luma = 8;
|
|
sps->bit_depth_chroma = 8;
|
|
}
|
|
|
|
log2_max_frame_num_minus4 = get_ue_golomb(gb);
|
|
if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
|
|
log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"log2_max_frame_num_minus4 out of range (0-12): %d\n",
|
|
log2_max_frame_num_minus4);
|
|
goto fail;
|
|
}
|
|
sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
|
|
|
|
sps->poc_type = get_ue_golomb_31(gb);
|
|
|
|
if (sps->poc_type == 0) { // FIXME #define
|
|
unsigned t = get_ue_golomb(gb);
|
|
if (t>12) {
|
|
av_log(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(gb);
|
|
sps->offset_for_non_ref_pic = get_se_golomb(gb);
|
|
sps->offset_for_top_to_bottom_field = get_se_golomb(gb);
|
|
sps->poc_cycle_length = get_ue_golomb(gb);
|
|
|
|
if ((unsigned)sps->poc_cycle_length >=
|
|
FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"poc_cycle_length overflow %d\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(gb);
|
|
} else if (sps->poc_type != 2) {
|
|
av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
|
|
goto fail;
|
|
}
|
|
|
|
sps->ref_frame_count = get_ue_golomb_31(gb);
|
|
if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
|
|
sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
|
|
if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"too many reference frames %d\n", sps->ref_frame_count);
|
|
goto fail;
|
|
}
|
|
sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
|
|
sps->mb_width = get_ue_golomb(gb) + 1;
|
|
sps->mb_height = get_ue_golomb(gb) + 1;
|
|
|
|
sps->frame_mbs_only_flag = get_bits1(gb);
|
|
|
|
if (sps->mb_height >= INT_MAX / 2U) {
|
|
av_log(avctx, AV_LOG_ERROR, "height overflow\n");
|
|
goto fail;
|
|
}
|
|
sps->mb_height *= 2 - sps->frame_mbs_only_flag;
|
|
|
|
if (!sps->frame_mbs_only_flag)
|
|
sps->mb_aff = get_bits1(gb);
|
|
else
|
|
sps->mb_aff = 0;
|
|
|
|
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, avctx)) {
|
|
av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
|
|
goto fail;
|
|
}
|
|
|
|
sps->direct_8x8_inference_flag = get_bits1(gb);
|
|
|
|
#ifndef ALLOW_INTERLACE
|
|
if (sps->mb_aff)
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"MBAFF support not included; enable it at compile-time.\n");
|
|
#endif
|
|
sps->crop = get_bits1(gb);
|
|
if (sps->crop) {
|
|
unsigned int crop_left = get_ue_golomb(gb);
|
|
unsigned int crop_right = get_ue_golomb(gb);
|
|
unsigned int crop_top = get_ue_golomb(gb);
|
|
unsigned int crop_bottom = get_ue_golomb(gb);
|
|
int width = 16 * sps->mb_width;
|
|
int height = 16 * sps->mb_height;
|
|
|
|
if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
|
|
av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
|
|
"values are l:%d r:%d t:%d b:%d\n",
|
|
crop_left, crop_right, crop_top, crop_bottom);
|
|
|
|
sps->crop_left =
|
|
sps->crop_right =
|
|
sps->crop_top =
|
|
sps->crop_bottom = 0;
|
|
} else {
|
|
int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
|
|
int hsub = (sps->chroma_format_idc == 1 ||
|
|
sps->chroma_format_idc == 2) ? 1 : 0;
|
|
int step_x = 1 << hsub;
|
|
int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
|
|
|
|
if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
|
|
crop_right > (unsigned)INT_MAX / 4 / step_x ||
|
|
crop_top > (unsigned)INT_MAX / 4 / step_y ||
|
|
crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
|
|
(crop_left + crop_right ) * step_x >= width ||
|
|
(crop_top + crop_bottom) * step_y >= height
|
|
) {
|
|
av_log(avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height);
|
|
goto fail;
|
|
}
|
|
|
|
sps->crop_left = crop_left * step_x;
|
|
sps->crop_right = crop_right * step_x;
|
|
sps->crop_top = crop_top * step_y;
|
|
sps->crop_bottom = crop_bottom * step_y;
|
|
}
|
|
} else {
|
|
sps->crop_left =
|
|
sps->crop_right =
|
|
sps->crop_top =
|
|
sps->crop_bottom =
|
|
sps->crop = 0;
|
|
}
|
|
|
|
sps->vui_parameters_present_flag = get_bits1(gb);
|
|
if (sps->vui_parameters_present_flag) {
|
|
int ret = decode_vui_parameters(gb, avctx, sps);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
if (get_bits_left(gb) < 0) {
|
|
av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
|
|
"Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
|
|
if (!ignore_truncation)
|
|
goto fail;
|
|
}
|
|
|
|
/* if the maximum delay is not stored in the SPS, derive it based on the
|
|
* level */
|
|
if (!sps->bitstream_restriction_flag &&
|
|
(sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
|
|
sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
|
|
for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
|
|
if (level_max_dpb_mbs[i][0] == sps->level_idc) {
|
|
sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
|
|
sps->num_reorder_frames);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!sps->sar.den)
|
|
sps->sar.den = 1;
|
|
|
|
if (avctx->debug & FF_DEBUG_PICT_INFO) {
|
|
static const char csp[4][5] = { "Gray", "420", "422", "444" };
|
|
av_log(avctx, AV_LOG_DEBUG,
|
|
"sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%u/%u/%u/%u %s %s %"PRId32"/%"PRId32" 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,
|
|
sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
|
|
);
|
|
}
|
|
|
|
/* check if this is a repeat of an already parsed SPS, then keep the
|
|
* original one.
|
|
* otherwise drop all PPSes that depend on it */
|
|
if (ps->sps_list[sps_id] &&
|
|
!memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
|
|
av_buffer_unref(&sps_buf);
|
|
} else {
|
|
remove_sps(ps, sps_id);
|
|
ps->sps_list[sps_id] = sps_buf;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
av_buffer_unref(&sps_buf);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
|
|
{
|
|
int i, j, q, x;
|
|
const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
|
|
for (j = 0; j < i; j++)
|
|
if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
|
|
64 * sizeof(uint8_t))) {
|
|
pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
|
|
break;
|
|
}
|
|
if (j < i)
|
|
continue;
|
|
|
|
for (q = 0; q < max_qp + 1; q++) {
|
|
int shift = ff_h264_quant_div6[q];
|
|
int idx = ff_h264_quant_rem6[q];
|
|
for (x = 0; x < 64; x++)
|
|
pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
|
|
((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
|
|
pps->scaling_matrix8[i][x]) << shift;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
|
|
{
|
|
int i, j, q, x;
|
|
const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
|
|
for (i = 0; i < 6; i++) {
|
|
pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
|
|
for (j = 0; j < i; j++)
|
|
if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
|
|
16 * sizeof(uint8_t))) {
|
|
pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
|
|
break;
|
|
}
|
|
if (j < i)
|
|
continue;
|
|
|
|
for (q = 0; q < max_qp + 1; q++) {
|
|
int shift = ff_h264_quant_div6[q] + 2;
|
|
int idx = ff_h264_quant_rem6[q];
|
|
for (x = 0; x < 16; x++)
|
|
pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
|
|
((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
|
|
pps->scaling_matrix4[i][x]) << shift;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void init_dequant_tables(PPS *pps, const SPS *sps)
|
|
{
|
|
int i, x;
|
|
init_dequant4_coeff_table(pps, sps);
|
|
memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
|
|
|
|
if (pps->transform_8x8_mode)
|
|
init_dequant8_coeff_table(pps, sps);
|
|
if (sps->transform_bypass) {
|
|
for (i = 0; i < 6; i++)
|
|
for (x = 0; x < 16; x++)
|
|
pps->dequant4_coeff[i][0][x] = 1 << 6;
|
|
if (pps->transform_8x8_mode)
|
|
for (i = 0; i < 6; i++)
|
|
for (x = 0; x < 64; x++)
|
|
pps->dequant8_coeff[i][0][x] = 1 << 6;
|
|
}
|
|
}
|
|
|
|
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(const SPS *sps, void *logctx)
|
|
{
|
|
int profile_idc = sps->profile_idc;
|
|
|
|
if ((profile_idc == 66 || profile_idc == 77 ||
|
|
profile_idc == 88) && (sps->constraint_set_flags & 7)) {
|
|
av_log(logctx, 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(GetBitContext *gb, AVCodecContext *avctx,
|
|
H264ParamSets *ps, int bit_length)
|
|
{
|
|
AVBufferRef *pps_buf;
|
|
const SPS *sps;
|
|
unsigned int pps_id = get_ue_golomb(gb);
|
|
PPS *pps;
|
|
int qp_bd_offset;
|
|
int bits_left;
|
|
int ret;
|
|
|
|
if (pps_id >= MAX_PPS_COUNT) {
|
|
av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
pps_buf = av_buffer_allocz(sizeof(*pps));
|
|
if (!pps_buf)
|
|
return AVERROR(ENOMEM);
|
|
pps = (PPS*)pps_buf->data;
|
|
|
|
pps->data_size = gb->buffer_end - gb->buffer;
|
|
if (pps->data_size > sizeof(pps->data)) {
|
|
av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
|
|
"(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
|
|
pps->data_size, sizeof(pps->data));
|
|
pps->data_size = sizeof(pps->data);
|
|
}
|
|
memcpy(pps->data, gb->buffer, pps->data_size);
|
|
|
|
pps->sps_id = get_ue_golomb_31(gb);
|
|
if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
|
|
!ps->sps_list[pps->sps_id]) {
|
|
av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
|
|
if (sps->bit_depth_luma > 14) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Invalid luma bit depth=%d\n",
|
|
sps->bit_depth_luma);
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
} else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
|
|
avpriv_report_missing_feature(avctx,
|
|
"Unimplemented luma bit depth=%d",
|
|
sps->bit_depth_luma);
|
|
ret = AVERROR_PATCHWELCOME;
|
|
goto fail;
|
|
}
|
|
|
|
pps->cabac = get_bits1(gb);
|
|
pps->pic_order_present = get_bits1(gb);
|
|
pps->slice_group_count = get_ue_golomb(gb) + 1;
|
|
if (pps->slice_group_count > 1) {
|
|
pps->mb_slice_group_map_type = get_ue_golomb(gb);
|
|
av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
|
|
}
|
|
pps->ref_count[0] = get_ue_golomb(gb) + 1;
|
|
pps->ref_count[1] = get_ue_golomb(gb) + 1;
|
|
if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
|
|
av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
|
|
|
|
pps->weighted_pred = get_bits1(gb);
|
|
pps->weighted_bipred_idc = get_bits(gb, 2);
|
|
pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
|
|
pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
|
|
pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
|
|
if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
pps->deblocking_filter_parameters_present = get_bits1(gb);
|
|
pps->constrained_intra_pred = get_bits1(gb);
|
|
pps->redundant_pic_cnt_present = get_bits1(gb);
|
|
|
|
pps->transform_8x8_mode = 0;
|
|
memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
|
|
sizeof(pps->scaling_matrix4));
|
|
memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
|
|
sizeof(pps->scaling_matrix8));
|
|
|
|
bits_left = bit_length - get_bits_count(gb);
|
|
if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
|
|
pps->transform_8x8_mode = get_bits1(gb);
|
|
ret = decode_scaling_matrices(gb, sps, pps, 0,
|
|
pps->scaling_matrix4, pps->scaling_matrix8);
|
|
if (ret < 0)
|
|
goto fail;
|
|
// second_chroma_qp_index_offset
|
|
pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
|
|
if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
} else {
|
|
pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
|
|
}
|
|
|
|
build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
|
|
sps->bit_depth_luma);
|
|
build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
|
|
sps->bit_depth_luma);
|
|
|
|
init_dequant_tables(pps, sps);
|
|
|
|
if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
|
|
pps->chroma_qp_diff = 1;
|
|
|
|
if (avctx->debug & FF_DEBUG_PICT_INFO) {
|
|
av_log(avctx, AV_LOG_DEBUG,
|
|
"pps:%u sps:%u %s slice_groups:%d ref:%u/%u %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" : "");
|
|
}
|
|
|
|
remove_pps(ps, pps_id);
|
|
ps->pps_list[pps_id] = pps_buf;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
av_buffer_unref(&pps_buf);
|
|
return ret;
|
|
}
|