mirror of https://git.ffmpeg.org/ffmpeg.git
232 lines
8.0 KiB
C
232 lines
8.0 KiB
C
/*
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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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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "bsf.h"
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#include "bsf_internal.h"
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#include "cbs.h"
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#include "cbs_bsf.h"
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#include "cbs_av1.h"
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typedef struct AV1MetadataContext {
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CBSBSFContext common;
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int td;
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AV1RawOBU td_obu;
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int color_primaries;
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int transfer_characteristics;
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int matrix_coefficients;
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int color_range;
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int chroma_sample_position;
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AVRational tick_rate;
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int num_ticks_per_picture;
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int delete_padding;
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} AV1MetadataContext;
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static int av1_metadata_update_sequence_header(AVBSFContext *bsf,
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AV1RawSequenceHeader *seq)
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{
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AV1MetadataContext *ctx = bsf->priv_data;
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AV1RawColorConfig *clc = &seq->color_config;
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AV1RawTimingInfo *tim = &seq->timing_info;
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if (ctx->color_primaries >= 0 ||
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ctx->transfer_characteristics >= 0 ||
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ctx->matrix_coefficients >= 0) {
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clc->color_description_present_flag = 1;
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if (ctx->color_primaries >= 0)
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clc->color_primaries = ctx->color_primaries;
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if (ctx->transfer_characteristics >= 0)
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clc->transfer_characteristics = ctx->transfer_characteristics;
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if (ctx->matrix_coefficients >= 0)
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clc->matrix_coefficients = ctx->matrix_coefficients;
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}
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if (ctx->color_range >= 0) {
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if (clc->color_primaries == AVCOL_PRI_BT709 &&
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clc->transfer_characteristics == AVCOL_TRC_IEC61966_2_1 &&
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clc->matrix_coefficients == AVCOL_SPC_RGB) {
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av_log(bsf, AV_LOG_WARNING, "Warning: color_range cannot be set "
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"on RGB streams encoded in BT.709 sRGB.\n");
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} else {
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clc->color_range = ctx->color_range;
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}
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}
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if (ctx->chroma_sample_position >= 0) {
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if (clc->mono_chrome || !clc->subsampling_x || !clc->subsampling_y) {
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av_log(bsf, AV_LOG_WARNING, "Warning: chroma_sample_position "
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"can only be set for 4:2:0 streams.\n");
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} else {
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clc->chroma_sample_position = ctx->chroma_sample_position;
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}
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}
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if (ctx->tick_rate.num && ctx->tick_rate.den) {
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int num, den;
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av_reduce(&num, &den, ctx->tick_rate.num, ctx->tick_rate.den,
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UINT32_MAX > INT_MAX ? UINT32_MAX : INT_MAX);
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tim->time_scale = num;
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tim->num_units_in_display_tick = den;
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seq->timing_info_present_flag = 1;
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if (ctx->num_ticks_per_picture > 0) {
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tim->equal_picture_interval = 1;
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tim->num_ticks_per_picture_minus_1 =
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ctx->num_ticks_per_picture - 1;
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}
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}
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return 0;
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}
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static int av1_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
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CodedBitstreamFragment *frag)
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{
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AV1MetadataContext *ctx = bsf->priv_data;
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int err, i;
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for (i = 0; i < frag->nb_units; i++) {
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if (frag->units[i].type == AV1_OBU_SEQUENCE_HEADER) {
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AV1RawOBU *obu = frag->units[i].content;
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err = av1_metadata_update_sequence_header(bsf, &obu->obu.sequence_header);
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if (err < 0)
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return err;
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}
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}
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// If a Temporal Delimiter is present, it must be the first OBU.
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if (frag->nb_units && frag->units[0].type == AV1_OBU_TEMPORAL_DELIMITER) {
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if (ctx->td == BSF_ELEMENT_REMOVE)
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ff_cbs_delete_unit(frag, 0);
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} else if (pkt && ctx->td == BSF_ELEMENT_INSERT) {
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err = ff_cbs_insert_unit_content(frag, 0, AV1_OBU_TEMPORAL_DELIMITER,
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&ctx->td_obu, NULL);
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if (err < 0) {
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av_log(bsf, AV_LOG_ERROR, "Failed to insert Temporal Delimiter.\n");
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return err;
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}
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}
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if (ctx->delete_padding) {
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for (i = frag->nb_units - 1; i >= 0; i--) {
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if (frag->units[i].type == AV1_OBU_PADDING)
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ff_cbs_delete_unit(frag, i);
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}
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}
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return 0;
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}
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static const CBSBSFType av1_metadata_type = {
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.codec_id = AV_CODEC_ID_AV1,
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.fragment_name = "temporal unit",
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.unit_name = "OBU",
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.update_fragment = &av1_metadata_update_fragment,
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};
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static int av1_metadata_init(AVBSFContext *bsf)
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{
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AV1MetadataContext *ctx = bsf->priv_data;
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ctx->td_obu = (AV1RawOBU) {
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.header.obu_type = AV1_OBU_TEMPORAL_DELIMITER,
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};
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return ff_cbs_bsf_generic_init(bsf, &av1_metadata_type);
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}
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#define OFFSET(x) offsetof(AV1MetadataContext, x)
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#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
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static const AVOption av1_metadata_options[] = {
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BSF_ELEMENT_OPTIONS_PIR("td", "Temporal Delimiter OBU",
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td, FLAGS),
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{ "color_primaries", "Set color primaries (section 6.4.2)",
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OFFSET(color_primaries), AV_OPT_TYPE_INT,
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{ .i64 = -1 }, -1, 255, FLAGS },
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{ "transfer_characteristics", "Set transfer characteristics (section 6.4.2)",
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OFFSET(transfer_characteristics), AV_OPT_TYPE_INT,
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{ .i64 = -1 }, -1, 255, FLAGS },
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{ "matrix_coefficients", "Set matrix coefficients (section 6.4.2)",
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OFFSET(matrix_coefficients), AV_OPT_TYPE_INT,
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{ .i64 = -1 }, -1, 255, FLAGS },
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{ "color_range", "Set color range flag (section 6.4.2)",
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OFFSET(color_range), AV_OPT_TYPE_INT,
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{ .i64 = -1 }, -1, 1, FLAGS, .unit = "cr" },
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{ "tv", "TV (limited) range", 0, AV_OPT_TYPE_CONST,
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{ .i64 = 0 }, .flags = FLAGS, .unit = "cr" },
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{ "pc", "PC (full) range", 0, AV_OPT_TYPE_CONST,
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{ .i64 = 1 }, .flags = FLAGS, .unit = "cr" },
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{ "chroma_sample_position", "Set chroma sample position (section 6.4.2)",
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OFFSET(chroma_sample_position), AV_OPT_TYPE_INT,
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{ .i64 = -1 }, -1, 3, FLAGS, .unit = "csp" },
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{ "unknown", "Unknown chroma sample position", 0, AV_OPT_TYPE_CONST,
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{ .i64 = AV1_CSP_UNKNOWN }, .flags = FLAGS, .unit = "csp" },
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{ "vertical", "Left chroma sample position", 0, AV_OPT_TYPE_CONST,
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{ .i64 = AV1_CSP_VERTICAL }, .flags = FLAGS, .unit = "csp" },
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{ "colocated", "Top-left chroma sample position", 0, AV_OPT_TYPE_CONST,
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{ .i64 = AV1_CSP_COLOCATED }, .flags = FLAGS, .unit = "csp" },
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{ "tick_rate", "Set display tick rate (time_scale / num_units_in_display_tick)",
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OFFSET(tick_rate), AV_OPT_TYPE_RATIONAL,
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{ .dbl = 0.0 }, 0, UINT_MAX, FLAGS },
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{ "num_ticks_per_picture", "Set display ticks per picture for CFR streams",
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OFFSET(num_ticks_per_picture), AV_OPT_TYPE_INT,
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{ .i64 = -1 }, -1, INT_MAX, FLAGS },
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{ "delete_padding", "Delete all Padding OBUs",
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OFFSET(delete_padding), AV_OPT_TYPE_BOOL,
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{ .i64 = 0 }, 0, 1, FLAGS},
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{ NULL }
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};
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static const AVClass av1_metadata_class = {
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.class_name = "av1_metadata_bsf",
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.item_name = av_default_item_name,
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.option = av1_metadata_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const enum AVCodecID av1_metadata_codec_ids[] = {
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AV_CODEC_ID_AV1, AV_CODEC_ID_NONE,
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};
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const FFBitStreamFilter ff_av1_metadata_bsf = {
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.p.name = "av1_metadata",
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.p.codec_ids = av1_metadata_codec_ids,
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.p.priv_class = &av1_metadata_class,
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.priv_data_size = sizeof(AV1MetadataContext),
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.init = &av1_metadata_init,
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.close = &ff_cbs_bsf_generic_close,
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.filter = &ff_cbs_bsf_generic_filter,
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};
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