2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #include "libavutil/common.h"
20 #include "libavutil/opt.h"
32 typedef struct AV1MetadataContext {
35 CodedBitstreamContext *cbc;
36 CodedBitstreamFragment access_unit;
41 int transfer_characteristics;
42 int matrix_coefficients;
45 int chroma_sample_position;
48 int num_ticks_per_picture;
52 static int av1_metadata_update_sequence_header(AVBSFContext *bsf,
53 AV1RawSequenceHeader *seq)
55 AV1MetadataContext *ctx = bsf->priv_data;
56 AV1RawColorConfig *clc = &seq->color_config;
57 AV1RawTimingInfo *tim = &seq->timing_info;
59 if (ctx->color_primaries >= 0 ||
60 ctx->transfer_characteristics >= 0 ||
61 ctx->matrix_coefficients >= 0) {
62 if (!clc->color_description_present_flag) {
63 clc->color_description_present_flag = 1;
64 clc->color_primaries = AVCOL_PRI_UNSPECIFIED;
65 clc->transfer_characteristics = AVCOL_TRC_UNSPECIFIED;
66 clc->matrix_coefficients = AVCOL_SPC_UNSPECIFIED;
69 if (ctx->color_primaries >= 0)
70 clc->color_primaries = ctx->color_primaries;
71 if (ctx->transfer_characteristics >= 0)
72 clc->transfer_characteristics = ctx->transfer_characteristics;
73 if (ctx->matrix_coefficients >= 0)
74 clc->matrix_coefficients = ctx->matrix_coefficients;
77 if (ctx->color_range >= 0) {
78 if (clc->color_primaries == AVCOL_PRI_BT709 &&
79 clc->transfer_characteristics == AVCOL_TRC_IEC61966_2_1 &&
80 clc->matrix_coefficients == AVCOL_SPC_RGB) {
81 av_log(bsf, AV_LOG_WARNING, "Warning: color_range cannot be set "
82 "on RGB streams encoded in BT.709 sRGB.\n");
84 clc->color_range = ctx->color_range;
88 if (ctx->chroma_sample_position >= 0) {
89 if (clc->mono_chrome || !clc->subsampling_x || !clc->subsampling_y) {
90 av_log(bsf, AV_LOG_WARNING, "Warning: chroma_sample_position "
91 "can only be set for 4:2:0 streams.\n");
93 clc->chroma_sample_position = ctx->chroma_sample_position;
97 if (ctx->tick_rate.num && ctx->tick_rate.den) {
100 av_reduce(&num, &den, ctx->tick_rate.num, ctx->tick_rate.den,
101 UINT32_MAX > INT_MAX ? UINT32_MAX : INT_MAX);
103 tim->time_scale = num;
104 tim->num_units_in_display_tick = den;
105 seq->timing_info_present_flag = 1;
107 if (ctx->num_ticks_per_picture > 0) {
108 tim->equal_picture_interval = 1;
109 tim->num_ticks_per_picture_minus_1 =
110 ctx->num_ticks_per_picture - 1;
117 static int av1_metadata_filter(AVBSFContext *bsf, AVPacket *out)
119 AV1MetadataContext *ctx = bsf->priv_data;
121 CodedBitstreamFragment *frag = &ctx->access_unit;
125 err = ff_bsf_get_packet(bsf, &in);
129 err = ff_cbs_read_packet(ctx->cbc, frag, in);
131 av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");
135 for (i = 0; i < frag->nb_units; i++) {
136 if (frag->units[i].type == AV1_OBU_SEQUENCE_HEADER) {
137 obu = frag->units[i].content;
138 err = av1_metadata_update_sequence_header(bsf, &obu->obu.sequence_header);
144 // If a Temporal Delimiter is present, it must be the first OBU.
145 if (frag->units[0].type == AV1_OBU_TEMPORAL_DELIMITER) {
146 if (ctx->td == REMOVE)
147 ff_cbs_delete_unit(ctx->cbc, frag, 0);
148 } else if (ctx->td == INSERT) {
150 .header.obu_type = AV1_OBU_TEMPORAL_DELIMITER,
153 err = ff_cbs_insert_unit_content(ctx->cbc, frag, 0, AV1_OBU_TEMPORAL_DELIMITER,
156 av_log(bsf, AV_LOG_ERROR, "Failed to insert Temporal Delimiter.\n");
161 err = ff_cbs_write_packet(ctx->cbc, out, frag);
163 av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
167 err = av_packet_copy_props(out, in);
173 ff_cbs_fragment_uninit(ctx->cbc, frag);
176 av_packet_unref(out);
182 static int av1_metadata_init(AVBSFContext *bsf)
184 AV1MetadataContext *ctx = bsf->priv_data;
185 CodedBitstreamFragment *frag = &ctx->access_unit;
189 err = ff_cbs_init(&ctx->cbc, AV_CODEC_ID_AV1, bsf);
193 if (bsf->par_in->extradata) {
194 err = ff_cbs_read_extradata(ctx->cbc, frag, bsf->par_in);
196 av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
200 for (i = 0; i < frag->nb_units; i++) {
201 if (frag->units[i].type == AV1_OBU_SEQUENCE_HEADER) {
202 obu = frag->units[i].content;
203 err = av1_metadata_update_sequence_header(bsf, &obu->obu.sequence_header);
209 err = ff_cbs_write_extradata(ctx->cbc, bsf->par_out, frag);
211 av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
218 ff_cbs_fragment_uninit(ctx->cbc, frag);
222 static void av1_metadata_close(AVBSFContext *bsf)
224 AV1MetadataContext *ctx = bsf->priv_data;
225 ff_cbs_close(&ctx->cbc);
228 #define OFFSET(x) offsetof(AV1MetadataContext, x)
229 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
230 static const AVOption av1_metadata_options[] = {
231 { "td", "Temporal Delimiter OBU",
232 OFFSET(td), AV_OPT_TYPE_INT,
233 { .i64 = PASS }, PASS, REMOVE, FLAGS, "td" },
234 { "pass", NULL, 0, AV_OPT_TYPE_CONST,
235 { .i64 = PASS }, .flags = FLAGS, .unit = "td" },
236 { "insert", NULL, 0, AV_OPT_TYPE_CONST,
237 { .i64 = INSERT }, .flags = FLAGS, .unit = "td" },
238 { "remove", NULL, 0, AV_OPT_TYPE_CONST,
239 { .i64 = REMOVE }, .flags = FLAGS, .unit = "td" },
241 { "color_primaries", "Set color primaries (section 6.4.2)",
242 OFFSET(color_primaries), AV_OPT_TYPE_INT,
243 { .i64 = -1 }, -1, 255, FLAGS },
244 { "transfer_characteristics", "Set transfer characteristics (section 6.4.2)",
245 OFFSET(transfer_characteristics), AV_OPT_TYPE_INT,
246 { .i64 = -1 }, -1, 255, FLAGS },
247 { "matrix_coefficients", "Set matrix coefficients (section 6.4.2)",
248 OFFSET(matrix_coefficients), AV_OPT_TYPE_INT,
249 { .i64 = -1 }, -1, 255, FLAGS },
251 { "color_range", "Set color range flag (section 6.4.2)",
252 OFFSET(color_range), AV_OPT_TYPE_INT,
253 { .i64 = -1 }, -1, 1, FLAGS, "cr" },
254 { "tv", "TV (limited) range", 0, AV_OPT_TYPE_CONST,
255 { .i64 = 0 }, .flags = FLAGS, .unit = "cr" },
256 { "pc", "PC (full) range", 0, AV_OPT_TYPE_CONST,
257 { .i64 = 1 }, .flags = FLAGS, .unit = "cr" },
259 { "chroma_sample_position", "Set chroma sample position (section 6.4.2)",
260 OFFSET(chroma_sample_position), AV_OPT_TYPE_INT,
261 { .i64 = -1 }, -1, 3, FLAGS, "csp" },
262 { "unknown", "Unknown chroma sample position", 0, AV_OPT_TYPE_CONST,
263 { .i64 = AV1_CSP_UNKNOWN }, .flags = FLAGS, .unit = "csp" },
264 { "vertical", "Left chroma sample position", 0, AV_OPT_TYPE_CONST,
265 { .i64 = AV1_CSP_VERTICAL }, .flags = FLAGS, .unit = "csp" },
266 { "colocated", "Top-left chroma sample position", 0, AV_OPT_TYPE_CONST,
267 { .i64 = AV1_CSP_COLOCATED }, .flags = FLAGS, .unit = "csp" },
269 { "tick_rate", "Set display tick rate (num_units_in_display_tick / time_scale)",
270 OFFSET(tick_rate), AV_OPT_TYPE_RATIONAL,
271 { .dbl = 0.0 }, 0, UINT_MAX, FLAGS },
272 { "num_ticks_per_picture", "Set display ticks per picture for CFR streams",
273 OFFSET(num_ticks_per_picture), AV_OPT_TYPE_INT,
274 { .i64 = -1 }, -1, INT_MAX, FLAGS },
279 static const AVClass av1_metadata_class = {
280 .class_name = "av1_metadata_bsf",
281 .item_name = av_default_item_name,
282 .option = av1_metadata_options,
283 .version = LIBAVUTIL_VERSION_INT,
286 static const enum AVCodecID av1_metadata_codec_ids[] = {
287 AV_CODEC_ID_AV1, AV_CODEC_ID_NONE,
290 const AVBitStreamFilter ff_av1_metadata_bsf = {
291 .name = "av1_metadata",
292 .priv_data_size = sizeof(AV1MetadataContext),
293 .priv_class = &av1_metadata_class,
294 .init = &av1_metadata_init,
295 .close = &av1_metadata_close,
296 .filter = &av1_metadata_filter,
297 .codec_ids = av1_metadata_codec_ids,