/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/common.h" #include "libavutil/opt.h" #include "bsf.h" #include "bsf_internal.h" #include "cbs.h" #include "cbs_bsf.h" #include "cbs_av1.h" typedef struct AV1MetadataContext { CBSBSFContext common; int td; AV1RawOBU td_obu; int color_primaries; int transfer_characteristics; int matrix_coefficients; int color_range; int chroma_sample_position; AVRational tick_rate; int num_ticks_per_picture; int delete_padding; } AV1MetadataContext; static int av1_metadata_update_sequence_header(AVBSFContext *bsf, AV1RawSequenceHeader *seq) { AV1MetadataContext *ctx = bsf->priv_data; AV1RawColorConfig *clc = &seq->color_config; AV1RawTimingInfo *tim = &seq->timing_info; if (ctx->color_primaries >= 0 || ctx->transfer_characteristics >= 0 || ctx->matrix_coefficients >= 0) { clc->color_description_present_flag = 1; if (ctx->color_primaries >= 0) clc->color_primaries = ctx->color_primaries; if (ctx->transfer_characteristics >= 0) clc->transfer_characteristics = ctx->transfer_characteristics; if (ctx->matrix_coefficients >= 0) clc->matrix_coefficients = ctx->matrix_coefficients; } if (ctx->color_range >= 0) { if (clc->color_primaries == AVCOL_PRI_BT709 && clc->transfer_characteristics == AVCOL_TRC_IEC61966_2_1 && clc->matrix_coefficients == AVCOL_SPC_RGB) { av_log(bsf, AV_LOG_WARNING, "Warning: color_range cannot be set " "on RGB streams encoded in BT.709 sRGB.\n"); } else { clc->color_range = ctx->color_range; } } if (ctx->chroma_sample_position >= 0) { if (clc->mono_chrome || !clc->subsampling_x || !clc->subsampling_y) { av_log(bsf, AV_LOG_WARNING, "Warning: chroma_sample_position " "can only be set for 4:2:0 streams.\n"); } else { clc->chroma_sample_position = ctx->chroma_sample_position; } } if (ctx->tick_rate.num && ctx->tick_rate.den) { int num, den; av_reduce(&num, &den, ctx->tick_rate.num, ctx->tick_rate.den, UINT32_MAX > INT_MAX ? UINT32_MAX : INT_MAX); tim->time_scale = num; tim->num_units_in_display_tick = den; seq->timing_info_present_flag = 1; if (ctx->num_ticks_per_picture > 0) { tim->equal_picture_interval = 1; tim->num_ticks_per_picture_minus_1 = ctx->num_ticks_per_picture - 1; } } return 0; } static int av1_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt, CodedBitstreamFragment *frag) { AV1MetadataContext *ctx = bsf->priv_data; int err, i; for (i = 0; i < frag->nb_units; i++) { if (frag->units[i].type == AV1_OBU_SEQUENCE_HEADER) { AV1RawOBU *obu = frag->units[i].content; err = av1_metadata_update_sequence_header(bsf, &obu->obu.sequence_header); if (err < 0) return err; } } // If a Temporal Delimiter is present, it must be the first OBU. if (frag->nb_units && frag->units[0].type == AV1_OBU_TEMPORAL_DELIMITER) { if (ctx->td == BSF_ELEMENT_REMOVE) ff_cbs_delete_unit(frag, 0); } else if (pkt && ctx->td == BSF_ELEMENT_INSERT) { err = ff_cbs_insert_unit_content(frag, 0, AV1_OBU_TEMPORAL_DELIMITER, &ctx->td_obu, NULL); if (err < 0) { av_log(bsf, AV_LOG_ERROR, "Failed to insert Temporal Delimiter.\n"); return err; } } if (ctx->delete_padding) { for (i = frag->nb_units - 1; i >= 0; i--) { if (frag->units[i].type == AV1_OBU_PADDING) ff_cbs_delete_unit(frag, i); } } return 0; } static const CBSBSFType av1_metadata_type = { .codec_id = AV_CODEC_ID_AV1, .fragment_name = "temporal unit", .unit_name = "OBU", .update_fragment = &av1_metadata_update_fragment, }; static int av1_metadata_init(AVBSFContext *bsf) { AV1MetadataContext *ctx = bsf->priv_data; ctx->td_obu = (AV1RawOBU) { .header.obu_type = AV1_OBU_TEMPORAL_DELIMITER, }; return ff_cbs_bsf_generic_init(bsf, &av1_metadata_type); } #define OFFSET(x) offsetof(AV1MetadataContext, x) #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM) static const AVOption av1_metadata_options[] = { BSF_ELEMENT_OPTIONS_PIR("td", "Temporal Delimiter OBU", td, FLAGS), { "color_primaries", "Set color primaries (section 6.4.2)", OFFSET(color_primaries), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 255, FLAGS }, { "transfer_characteristics", "Set transfer characteristics (section 6.4.2)", OFFSET(transfer_characteristics), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 255, FLAGS }, { "matrix_coefficients", "Set matrix coefficients (section 6.4.2)", OFFSET(matrix_coefficients), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 255, FLAGS }, { "color_range", "Set color range flag (section 6.4.2)", OFFSET(color_range), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, FLAGS, "cr" }, { "tv", "TV (limited) range", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, .flags = FLAGS, .unit = "cr" }, { "pc", "PC (full) range", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, .flags = FLAGS, .unit = "cr" }, { "chroma_sample_position", "Set chroma sample position (section 6.4.2)", OFFSET(chroma_sample_position), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 3, FLAGS, "csp" }, { "unknown", "Unknown chroma sample position", 0, AV_OPT_TYPE_CONST, { .i64 = AV1_CSP_UNKNOWN }, .flags = FLAGS, .unit = "csp" }, { "vertical", "Left chroma sample position", 0, AV_OPT_TYPE_CONST, { .i64 = AV1_CSP_VERTICAL }, .flags = FLAGS, .unit = "csp" }, { "colocated", "Top-left chroma sample position", 0, AV_OPT_TYPE_CONST, { .i64 = AV1_CSP_COLOCATED }, .flags = FLAGS, .unit = "csp" }, { "tick_rate", "Set display tick rate (time_scale / num_units_in_display_tick)", OFFSET(tick_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0.0 }, 0, UINT_MAX, FLAGS }, { "num_ticks_per_picture", "Set display ticks per picture for CFR streams", OFFSET(num_ticks_per_picture), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS }, { "delete_padding", "Delete all Padding OBUs", OFFSET(delete_padding), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS}, { NULL } }; static const AVClass av1_metadata_class = { .class_name = "av1_metadata_bsf", .item_name = av_default_item_name, .option = av1_metadata_options, .version = LIBAVUTIL_VERSION_INT, }; static const enum AVCodecID av1_metadata_codec_ids[] = { AV_CODEC_ID_AV1, AV_CODEC_ID_NONE, }; const FFBitStreamFilter ff_av1_metadata_bsf = { .p.name = "av1_metadata", .p.codec_ids = av1_metadata_codec_ids, .p.priv_class = &av1_metadata_class, .priv_data_size = sizeof(AV1MetadataContext), .init = &av1_metadata_init, .close = &ff_cbs_bsf_generic_close, .filter = &ff_cbs_bsf_generic_filter, };