313 lines
9.9 KiB
C
Executable file
313 lines
9.9 KiB
C
Executable file
/*
|
|
* 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/avstring.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/opt.h"
|
|
|
|
#include "bsf.h"
|
|
#include "bsf_internal.h"
|
|
#include "cbs.h"
|
|
#include "cbs_mpeg2.h"
|
|
#include "mpeg12.h"
|
|
|
|
typedef struct MPEG2MetadataContext {
|
|
const AVClass *class;
|
|
|
|
CodedBitstreamContext *cbc;
|
|
CodedBitstreamFragment fragment;
|
|
|
|
MPEG2RawExtensionData sequence_display_extension;
|
|
|
|
AVRational display_aspect_ratio;
|
|
|
|
AVRational frame_rate;
|
|
|
|
int video_format;
|
|
int colour_primaries;
|
|
int transfer_characteristics;
|
|
int matrix_coefficients;
|
|
|
|
int mpeg1_warned;
|
|
} MPEG2MetadataContext;
|
|
|
|
|
|
static int mpeg2_metadata_update_fragment(AVBSFContext *bsf,
|
|
CodedBitstreamFragment *frag)
|
|
{
|
|
MPEG2MetadataContext *ctx = bsf->priv_data;
|
|
MPEG2RawSequenceHeader *sh = NULL;
|
|
MPEG2RawSequenceExtension *se = NULL;
|
|
MPEG2RawSequenceDisplayExtension *sde = NULL;
|
|
int i, se_pos;
|
|
|
|
for (i = 0; i < frag->nb_units; i++) {
|
|
if (frag->units[i].type == MPEG2_START_SEQUENCE_HEADER) {
|
|
sh = frag->units[i].content;
|
|
} else if (frag->units[i].type == MPEG2_START_EXTENSION) {
|
|
MPEG2RawExtensionData *ext = frag->units[i].content;
|
|
if (ext->extension_start_code_identifier ==
|
|
MPEG2_EXTENSION_SEQUENCE) {
|
|
se = &ext->data.sequence;
|
|
se_pos = i;
|
|
} else if (ext->extension_start_code_identifier ==
|
|
MPEG2_EXTENSION_SEQUENCE_DISPLAY) {
|
|
sde = &ext->data.sequence_display;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!sh || !se) {
|
|
// No sequence header and sequence extension: not an MPEG-2 video
|
|
// sequence.
|
|
if (sh && !ctx->mpeg1_warned) {
|
|
av_log(bsf, AV_LOG_WARNING, "Stream contains a sequence "
|
|
"header but not a sequence extension: maybe it's "
|
|
"actually MPEG-1?\n");
|
|
ctx->mpeg1_warned = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (ctx->display_aspect_ratio.num && ctx->display_aspect_ratio.den) {
|
|
int num, den;
|
|
|
|
av_reduce(&num, &den, ctx->display_aspect_ratio.num,
|
|
ctx->display_aspect_ratio.den, 65535);
|
|
|
|
if (num == 4 && den == 3)
|
|
sh->aspect_ratio_information = 2;
|
|
else if (num == 16 && den == 9)
|
|
sh->aspect_ratio_information = 3;
|
|
else if (num == 221 && den == 100)
|
|
sh->aspect_ratio_information = 4;
|
|
else
|
|
sh->aspect_ratio_information = 1;
|
|
}
|
|
|
|
if (ctx->frame_rate.num && ctx->frame_rate.den) {
|
|
int code, ext_n, ext_d;
|
|
|
|
ff_mpeg12_find_best_frame_rate(ctx->frame_rate,
|
|
&code, &ext_n, &ext_d, 0);
|
|
|
|
sh->frame_rate_code = code;
|
|
se->frame_rate_extension_n = ext_n;
|
|
se->frame_rate_extension_d = ext_d;
|
|
}
|
|
|
|
if (ctx->video_format >= 0 ||
|
|
ctx->colour_primaries >= 0 ||
|
|
ctx->transfer_characteristics >= 0 ||
|
|
ctx->matrix_coefficients >= 0) {
|
|
if (!sde) {
|
|
int err;
|
|
ctx->sequence_display_extension.extension_start_code =
|
|
MPEG2_START_EXTENSION;
|
|
ctx->sequence_display_extension.extension_start_code_identifier =
|
|
MPEG2_EXTENSION_SEQUENCE_DISPLAY;
|
|
sde = &ctx->sequence_display_extension.data.sequence_display;
|
|
|
|
*sde = (MPEG2RawSequenceDisplayExtension) {
|
|
.video_format = 5,
|
|
|
|
.colour_description = 0,
|
|
.colour_primaries = 2,
|
|
.transfer_characteristics = 2,
|
|
.matrix_coefficients = 2,
|
|
|
|
.display_horizontal_size =
|
|
se->horizontal_size_extension << 12 | sh->horizontal_size_value,
|
|
.display_vertical_size =
|
|
se->vertical_size_extension << 12 | sh->vertical_size_value,
|
|
};
|
|
|
|
err = ff_cbs_insert_unit_content(frag, se_pos + 1,
|
|
MPEG2_START_EXTENSION,
|
|
&ctx->sequence_display_extension,
|
|
NULL);
|
|
if (err < 0) {
|
|
av_log(bsf, AV_LOG_ERROR, "Failed to insert new sequence "
|
|
"display extension.\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (ctx->video_format >= 0)
|
|
sde->video_format = ctx->video_format;
|
|
|
|
if (ctx->colour_primaries >= 0 ||
|
|
ctx->transfer_characteristics >= 0 ||
|
|
ctx->matrix_coefficients >= 0) {
|
|
sde->colour_description = 1;
|
|
|
|
if (ctx->colour_primaries >= 0)
|
|
sde->colour_primaries = ctx->colour_primaries;
|
|
|
|
if (ctx->transfer_characteristics >= 0)
|
|
sde->transfer_characteristics = ctx->transfer_characteristics;
|
|
|
|
if (ctx->matrix_coefficients >= 0)
|
|
sde->matrix_coefficients = ctx->matrix_coefficients;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mpeg2_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
|
|
{
|
|
MPEG2MetadataContext *ctx = bsf->priv_data;
|
|
CodedBitstreamFragment *frag = &ctx->fragment;
|
|
int err;
|
|
|
|
err = ff_bsf_get_packet_ref(bsf, pkt);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = ff_cbs_read_packet(ctx->cbc, frag, pkt);
|
|
if (err < 0) {
|
|
av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");
|
|
goto fail;
|
|
}
|
|
|
|
err = mpeg2_metadata_update_fragment(bsf, frag);
|
|
if (err < 0) {
|
|
av_log(bsf, AV_LOG_ERROR, "Failed to update frame fragment.\n");
|
|
goto fail;
|
|
}
|
|
|
|
err = ff_cbs_write_packet(ctx->cbc, pkt, frag);
|
|
if (err < 0) {
|
|
av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
|
|
goto fail;
|
|
}
|
|
|
|
err = 0;
|
|
fail:
|
|
ff_cbs_fragment_reset(frag);
|
|
|
|
if (err < 0)
|
|
av_packet_unref(pkt);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int mpeg2_metadata_init(AVBSFContext *bsf)
|
|
{
|
|
MPEG2MetadataContext *ctx = bsf->priv_data;
|
|
CodedBitstreamFragment *frag = &ctx->fragment;
|
|
int err;
|
|
|
|
#define VALIDITY_CHECK(name) do { \
|
|
if (!ctx->name) { \
|
|
av_log(bsf, AV_LOG_ERROR, "The value 0 for %s is " \
|
|
"forbidden.\n", #name); \
|
|
return AVERROR(EINVAL); \
|
|
} \
|
|
} while (0)
|
|
VALIDITY_CHECK(colour_primaries);
|
|
VALIDITY_CHECK(transfer_characteristics);
|
|
VALIDITY_CHECK(matrix_coefficients);
|
|
#undef VALIDITY_CHECK
|
|
|
|
err = ff_cbs_init(&ctx->cbc, AV_CODEC_ID_MPEG2VIDEO, bsf);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (bsf->par_in->extradata) {
|
|
err = ff_cbs_read_extradata(ctx->cbc, frag, bsf->par_in);
|
|
if (err < 0) {
|
|
av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
|
|
goto fail;
|
|
}
|
|
|
|
err = mpeg2_metadata_update_fragment(bsf, frag);
|
|
if (err < 0) {
|
|
av_log(bsf, AV_LOG_ERROR, "Failed to update metadata fragment.\n");
|
|
goto fail;
|
|
}
|
|
|
|
err = ff_cbs_write_extradata(ctx->cbc, bsf->par_out, frag);
|
|
if (err < 0) {
|
|
av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
err = 0;
|
|
fail:
|
|
ff_cbs_fragment_reset(frag);
|
|
return err;
|
|
}
|
|
|
|
static void mpeg2_metadata_close(AVBSFContext *bsf)
|
|
{
|
|
MPEG2MetadataContext *ctx = bsf->priv_data;
|
|
|
|
ff_cbs_fragment_free(&ctx->fragment);
|
|
ff_cbs_close(&ctx->cbc);
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(MPEG2MetadataContext, x)
|
|
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
|
|
static const AVOption mpeg2_metadata_options[] = {
|
|
{ "display_aspect_ratio", "Set display aspect ratio (table 6-3)",
|
|
OFFSET(display_aspect_ratio), AV_OPT_TYPE_RATIONAL,
|
|
{ .dbl = 0.0 }, 0, 65535, FLAGS },
|
|
|
|
{ "frame_rate", "Set frame rate",
|
|
OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL,
|
|
{ .dbl = 0.0 }, 0, UINT_MAX, FLAGS },
|
|
|
|
{ "video_format", "Set video format (table 6-6)",
|
|
OFFSET(video_format), AV_OPT_TYPE_INT,
|
|
{ .i64 = -1 }, -1, 7, FLAGS },
|
|
{ "colour_primaries", "Set colour primaries (table 6-7)",
|
|
OFFSET(colour_primaries), AV_OPT_TYPE_INT,
|
|
{ .i64 = -1 }, -1, 255, FLAGS },
|
|
{ "transfer_characteristics", "Set transfer characteristics (table 6-8)",
|
|
OFFSET(transfer_characteristics), AV_OPT_TYPE_INT,
|
|
{ .i64 = -1 }, -1, 255, FLAGS },
|
|
{ "matrix_coefficients", "Set matrix coefficients (table 6-9)",
|
|
OFFSET(matrix_coefficients), AV_OPT_TYPE_INT,
|
|
{ .i64 = -1 }, -1, 255, FLAGS },
|
|
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVClass mpeg2_metadata_class = {
|
|
.class_name = "mpeg2_metadata_bsf",
|
|
.item_name = av_default_item_name,
|
|
.option = mpeg2_metadata_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
static const enum AVCodecID mpeg2_metadata_codec_ids[] = {
|
|
AV_CODEC_ID_MPEG2VIDEO, AV_CODEC_ID_NONE,
|
|
};
|
|
|
|
const AVBitStreamFilter ff_mpeg2_metadata_bsf = {
|
|
.name = "mpeg2_metadata",
|
|
.priv_data_size = sizeof(MPEG2MetadataContext),
|
|
.priv_class = &mpeg2_metadata_class,
|
|
.init = &mpeg2_metadata_init,
|
|
.close = &mpeg2_metadata_close,
|
|
.filter = &mpeg2_metadata_filter,
|
|
.codec_ids = mpeg2_metadata_codec_ids,
|
|
};
|