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Code Issues Releases Activity

flac muxer: support reading updated extradata from side data

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This commit is contained in:
Anton Khirnov
2014-05-26 22:14:14 +02:00
parent 0097cbea69
commit e19d48dfce
4 changed files with 37 additions and 15 deletions
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37
libavformat/flacenc.c
View File

@@ -31,6 +31,9 @@
typedef struct FlacMuxerContext {
const AVClass *class;
int write_header;
/* updated streaminfo sent by the encoder at the end */
uint8_t *streaminfo;
} FlacMuxerContext;
static int flac_write_block_padding(AVIOContext *pb, unsigned int n_padding_bytes,
@@ -80,7 +83,8 @@ static int flac_write_header(struct AVFormatContext *s)
if (!c->write_header)
return 0;
ret = ff_flac_write_header(s->pb, codec, 0);
ret = ff_flac_write_header(s->pb, codec->extradata,
codec->extradata_size, 0);
if (ret)
return ret;
@@ -118,17 +122,14 @@ static int flac_write_header(struct AVFormatContext *s)
static int flac_write_trailer(struct AVFormatContext *s)
{
AVIOContext *pb = s->pb;
uint8_t *streaminfo;
enum FLACExtradataFormat format;
int64_t file_size;
FlacMuxerContext *c = s->priv_data;
uint8_t *streaminfo = c->streaminfo ? c->streaminfo :
s->streams[0]->codec->extradata;
if (!c->write_header)
if (!c->write_header || !streaminfo)
return 0;
if (!avpriv_flac_is_extradata_valid(s->streams[0]->codec, &format, &streaminfo))
return -1;
if (pb->seekable) {
/* rewrite the STREAMINFO header block data */
file_size = avio_tell(pb);
@@ -139,12 +140,32 @@ static int flac_write_trailer(struct AVFormatContext *s)
} else {
av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n");
}
av_freep(&c->streaminfo);
return 0;
}
static int flac_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
avio_write(s->pb, pkt->data, pkt->size);
FlacMuxerContext *c = s->priv_data;
uint8_t *streaminfo;
int streaminfo_size;
/* check for updated streaminfo */
streaminfo = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
&streaminfo_size);
if (streaminfo && streaminfo_size == FLAC_STREAMINFO_SIZE) {
av_freep(&c->streaminfo);
c->streaminfo = av_malloc(FLAC_STREAMINFO_SIZE);
if (!c->streaminfo)
return AVERROR(ENOMEM);
memcpy(c->streaminfo, streaminfo, FLAC_STREAMINFO_SIZE);
}
if (pkt->size)
avio_write(s->pb, pkt->data, pkt->size);
return 0;
}

4
libavformat/flacenc.h
View File

@@ -26,8 +26,8 @@
#include "libavcodec/bytestream.h"
#include "avformat.h"
int ff_flac_write_header(AVIOContext *pb, AVCodecContext *codec,
int last_block);
int ff_flac_write_header(AVIOContext *pb, uint8_t *extradata,
int extradata_size, int last_block);
int ff_flac_is_native_layout(uint64_t channel_layout);

8
libavformat/flacenc_header.c
View File

@@ -26,8 +26,8 @@
#include "avformat.h"
#include "flacenc.h"
int ff_flac_write_header(AVIOContext *pb, AVCodecContext *codec,
int last_block)
int ff_flac_write_header(AVIOContext *pb, uint8_t *extradata,
int extradata_size, int last_block)
{
uint8_t header[8] = {
0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22
@@ -35,14 +35,14 @@ int ff_flac_write_header(AVIOContext *pb, AVCodecContext *codec,
header[4] = last_block ? 0x80 : 0x00;
if (codec->extradata_size < FLAC_STREAMINFO_SIZE)
if (extradata_size < FLAC_STREAMINFO_SIZE)
return AVERROR_INVALIDDATA;
/* write "fLaC" stream marker and first metadata block header */
avio_write(pb, header, 8);
/* write STREAMINFO */
avio_write(pb, codec->extradata, FLAC_STREAMINFO_SIZE);
avio_write(pb, extradata, FLAC_STREAMINFO_SIZE);
return 0;
}

3
libavformat/matroskaenc.c
View File

@@ -477,7 +477,8 @@ static int put_flac_codecpriv(AVFormatContext *s,
int write_comment = (codec->channel_layout &&
!(codec->channel_layout & ~0x3ffffULL) &&
!ff_flac_is_native_layout(codec->channel_layout));
int ret = ff_flac_write_header(pb, codec, !write_comment);
int ret = ff_flac_write_header(pb, codec->extradata, codec->extradata_size,
!write_comment);
if (ret < 0)
return ret;