| /* | |
| * 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, .unit = "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, .unit = "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, | |
| }; |