static int flac_write_header(struct AVFormatContext *s)
{
int ret;
AVCodecContext *codec = s->streams[0]->codec;
if (s->nb_streams > 1) {
av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
return AVERROR(EINVAL);
}
if (codec->codec_id != AV_CODEC_ID_FLAC) {
av_log(s, AV_LOG_ERROR, "unsupported codec\n");
return AVERROR(EINVAL);
}
ret = ff_flac_write_header(s->pb, codec, 0);
if (ret)
return ret;
ret = flac_write_block_comment(s->pb, &s->metadata, 0,
codec->flags & CODEC_FLAG_BITEXACT);
if (ret)
return ret;
/* The command line flac encoder defaults to placing a seekpoint
* every 10s. So one might add padding to allow that later
* but there seems to be no simple way to get the duration here.
* So let's try the flac default of 8192 bytes */
flac_write_block_padding(s->pb, 8192, 1);
return ret;
}
static int flac_write_header(struct AVFormatContext *s)
{
int ret;
AVCodecParameters *par = s->streams[0]->codecpar;
FlacMuxerContext *c = s->priv_data;
if (!c->write_header)
return 0;
ret = ff_flac_write_header(s->pb, par->extradata,
par->extradata_size, 0);
if (ret)
return ret;
/* add the channel layout tag */
if (par->channel_layout &&
!(par->channel_layout & ~0x3ffffULL) &&
!ff_flac_is_native_layout(par->channel_layout)) {
AVDictionaryEntry *chmask = av_dict_get(s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK",
NULL, 0);
if (chmask) {
av_log(s, AV_LOG_WARNING, "A WAVEFORMATEXTENSIBLE_CHANNEL_MASK is "
"already present, this muxer will not overwrite it.\n");
} else {
uint8_t buf[32];
snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
av_dict_set(&s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
}
}
ret = flac_write_block_comment(s->pb, &s->metadata, 0,
s->flags & AVFMT_FLAG_BITEXACT);
if (ret)
return ret;
/* The command line flac encoder defaults to placing a seekpoint
* every 10s. So one might add padding to allow that later
* but there seems to be no simple way to get the duration here.
* So let's try the flac default of 8192 bytes */
flac_write_block_padding(s->pb, 8192, 1);
return ret;
}
static int flac_write_header(struct AVFormatContext *s)
{
int ret;
int padding = s->metadata_header_padding;
AVCodecContext *codec = s->streams[0]->codec;
FlacMuxerContext *c = s->priv_data;
if (!c->write_header)
return 0;
if (s->nb_streams > 1) {
av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
return AVERROR(EINVAL);
}
if (codec->codec_id != AV_CODEC_ID_FLAC) {
av_log(s, AV_LOG_ERROR, "unsupported codec\n");
return AVERROR(EINVAL);
}
if (padding < 0)
padding = 8192;
/* The FLAC specification states that 24 bits are used to represent the
* size of a metadata block so we must clip this value to 2^24-1. */
padding = av_clip_c(padding, 0, 16777215);
ret = ff_flac_write_header(s->pb, codec, 0);
if (ret)
return ret;
ret = flac_write_block_comment(s->pb, &s->metadata, !padding,
s->flags & AVFMT_FLAG_BITEXACT);
if (ret)
return ret;
/* The command line flac encoder defaults to placing a seekpoint
* every 10s. So one might add padding to allow that later
* but there seems to be no simple way to get the duration here.
* So just add the amount requested by the user. */
if (padding)
flac_write_block_padding(s->pb, padding, 1);
return ret;
}
static int flac_write_header(struct AVFormatContext *s)
{
int ret;
AVCodecContext *codec = s->streams[0]->codec;
ret = ff_flac_write_header(s->pb, codec, 0);
if (ret)
return ret;
ret = flac_write_block_comment(s->pb, &s->metadata, 0,
codec->flags & CODEC_FLAG_BITEXACT);
if (ret)
return ret;
/* The command line flac encoder defaults to placing a seekpoint
* every 10s. So one might add padding to allow that later
* but there seems to be no simple way to get the duration here.
* So let's try the flac default of 8192 bytes */
flac_write_block_padding(s->pb, 8192, 1);
return ret;
}
static int flac_write_header(struct AVFormatContext *s)
{
int ret;
int padding = s->metadata_header_padding;
AVCodecContext *codec = s->streams[0]->codec;
FlacMuxerContext *c = s->priv_data;
if (!c->write_header)
return 0;
if (s->nb_streams > 1) {
av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
return AVERROR(EINVAL);
}
if (codec->codec_id != AV_CODEC_ID_FLAC) {
av_log(s, AV_LOG_ERROR, "unsupported codec\n");
return AVERROR(EINVAL);
}
if (padding < 0)
padding = 8192;
/* The FLAC specification states that 24 bits are used to represent the
* size of a metadata block so we must clip this value to 2^24-1. */
padding = av_clip_uintp2(padding, 24);
ret = ff_flac_write_header(s->pb, codec->extradata,
codec->extradata_size, 0);
if (ret)
return ret;
/* add the channel layout tag */
if (codec->channel_layout &&
!(codec->channel_layout & ~0x3ffffULL) &&
!ff_flac_is_native_layout(codec->channel_layout)) {
AVDictionaryEntry *chmask = av_dict_get(s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK",
NULL, 0);
if (chmask) {
av_log(s, AV_LOG_WARNING, "A WAVEFORMATEXTENSIBLE_CHANNEL_MASK is "
"already present, this muxer will not overwrite it.\n");
} else {
uint8_t buf[32];
snprintf(buf, sizeof(buf), "0x%"PRIx64, codec->channel_layout);
av_dict_set(&s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
}
}
ret = flac_write_block_comment(s->pb, &s->metadata, !padding,
s->flags & AVFMT_FLAG_BITEXACT);
if (ret)
return ret;
/* The command line flac encoder defaults to placing a seekpoint
* every 10s. So one might add padding to allow that later
* but there seems to be no simple way to get the duration here.
* So just add the amount requested by the user. */
if (padding)
flac_write_block_padding(s->pb, padding, 1);
return ret;
}
