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230 lines
8.0 KiB
230 lines
8.0 KiB
/* |
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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 "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, "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, "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 (num_units_in_display_tick / time_scale)", |
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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 AVBitStreamFilter ff_av1_metadata_bsf = { |
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.name = "av1_metadata", |
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.priv_data_size = sizeof(AV1MetadataContext), |
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.priv_class = &av1_metadata_class, |
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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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.codec_ids = av1_metadata_codec_ids, |
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};
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