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flac muxer: add option to disable writing the global header

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The global header is not explicitly required for playback, and
omitting it allows for simple concatenation.
This commit is contained in:
Justin Ruggles 2014-01-09 12:11:26 -05:00
parent e6f0bb6527
commit aa69cbc9e0
2 changed files with 29 additions and 1 deletions
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28
libavformat/flacenc.c
View File

@ -19,6 +19,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/opt.h"
#include "libavcodec/flac.h"
#include "avformat.h"
#include "flacenc.h"
@ -26,6 +27,11 @@
#include "libavcodec/bytestream.h"
typedef struct FlacMuxerContext {
const AVClass *class;
int write_header;
} FlacMuxerContext;
static int flac_write_block_padding(AVIOContext *pb, unsigned int n_padding_bytes,
int last_block)
{
@ -68,6 +74,10 @@ static int flac_write_header(struct AVFormatContext *s)
{
int ret;
AVCodecContext *codec = s->streams[0]->codec;
FlacMuxerContext *c = s->priv_data;
if (!c->write_header)
return 0;
ret = ff_flac_write_header(s->pb, codec, 0);
if (ret)
@ -93,6 +103,10 @@ static int flac_write_trailer(struct AVFormatContext *s)
uint8_t *streaminfo;
enum FLACExtradataFormat format;
int64_t file_size;
FlacMuxerContext *c = s->priv_data;
if (!c->write_header)
return 0;
if (!avpriv_flac_is_extradata_valid(s->streams[0]->codec, &format, &streaminfo))
return -1;
@ -116,9 +130,22 @@ static int flac_write_packet(struct AVFormatContext *s, AVPacket *pkt)
return 0;
}
static const AVOption flacenc_options[] = {
{ "write_header", "Write the file header", offsetof(FlacMuxerContext, write_header), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
{ NULL },
};
static const AVClass flac_muxer_class = {
.class_name = "flac muxer",
.item_name = av_default_item_name,
.option = flacenc_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_flac_muxer = {
.name = "flac",
.long_name = NULL_IF_CONFIG_SMALL("raw FLAC"),
.priv_data_size = sizeof(FlacMuxerContext),
.mime_type = "audio/x-flac",
.extensions = "flac",
.audio_codec = AV_CODEC_ID_FLAC,
@ -127,4 +154,5 @@ AVOutputFormat ff_flac_muxer = {
.write_packet = flac_write_packet,
.write_trailer = flac_write_trailer,
.flags = AVFMT_NOTIMESTAMPS,
.priv_class = &flac_muxer_class,
};

2
libavformat/version.h
View File

@ -31,7 +31,7 @@
#define LIBAVFORMAT_VERSION_MAJOR 55
#define LIBAVFORMAT_VERSION_MINOR 10
#define LIBAVFORMAT_VERSION_MICRO 1
#define LIBAVFORMAT_VERSION_MICRO 2
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \