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flacdec: Parse the metadata header in the raw FLAC demuxer.

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Originally committed as revision 17852 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles
2009-03-06 01:31:10 +00:00
parent 5b63d33d7d
commit f48b9304cd
4 changed files with 89 additions and 13 deletions
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1
libavcodec/Makefile
View File

@@ -344,6 +344,7 @@ OBJS-$(CONFIG_ADPCM_YAMAHA_ENCODER) += adpcm.o
# libavformat dependencies
OBJS-$(CONFIG_EAC3_DEMUXER) += ac3_parser.o ac3tab.o aac_ac3_parser.o
OBJS-$(CONFIG_FLAC_DEMUXER) += flacdec.o
OBJS-$(CONFIG_FLAC_MUXER) += flacdec.o
OBJS-$(CONFIG_GXF_DEMUXER) += mpeg12data.o
OBJS-$(CONFIG_MATROSKA_AUDIO_MUXER) += xiph.o mpeg4audio.o flacdec.o

2
libavformat/Makefile
View File

@@ -53,7 +53,7 @@ OBJS-$(CONFIG_EAC3_DEMUXER) += raw.o id3v2.o
OBJS-$(CONFIG_EAC3_MUXER) += raw.o
OBJS-$(CONFIG_FFM_DEMUXER) += ffmdec.o
OBJS-$(CONFIG_FFM_MUXER) += ffmenc.o
OBJS-$(CONFIG_FLAC_DEMUXER) += flacdec.o raw.o id3v2.o
OBJS-$(CONFIG_FLAC_DEMUXER) += flacdec.o raw.o id3v2.o oggparsevorbis.o
OBJS-$(CONFIG_FLAC_MUXER) += flacenc.o
OBJS-$(CONFIG_FLIC_DEMUXER) += flic.o
OBJS-$(CONFIG_FLV_DEMUXER) += flvdec.o

77
libavformat/flacdec.c
View File

@@ -19,15 +19,19 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavcodec/flac.h"
#include "avformat.h"
#include "raw.h"
#include "id3v2.h"
#include "oggdec.h"
static int flac_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
uint8_t buf[ID3v2_HEADER_SIZE];
int ret;
int ret, metadata_last=0, metadata_type, metadata_size, found_streaminfo=0;
uint8_t header[4];
uint8_t *buffer=NULL;
AVStream *st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
@@ -44,6 +48,77 @@ static int flac_read_header(AVFormatContext *s,
} else {
url_fseek(s->pb, 0, SEEK_SET);
}
/* if fLaC marker is not found, assume there is no header */
if (get_le32(s->pb) != MKTAG('f','L','a','C'))
return 0;
/* process metadata blocks */
while (!url_feof(s->pb) && !metadata_last) {
get_buffer(s->pb, header, 4);
ff_flac_parse_block_header(header, &metadata_last, &metadata_type,
&metadata_size);
switch (metadata_type) {
/* allocate and read metadata block for supported types */
case FLAC_METADATA_TYPE_STREAMINFO:
case FLAC_METADATA_TYPE_VORBIS_COMMENT:
buffer = av_mallocz(metadata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!buffer) {
return AVERROR_NOMEM;
}
if (get_buffer(s->pb, buffer, metadata_size) != metadata_size) {
av_freep(&buffer);
return AVERROR_IO;
}
break;
/* skip metadata block for unsupported types */
default:
ret = url_fseek(s->pb, metadata_size, SEEK_CUR);
if (ret < 0)
return ret;
}
if (metadata_type == FLAC_METADATA_TYPE_STREAMINFO) {
FLACStreaminfo si;
/* STREAMINFO can only occur once */
if (found_streaminfo) {
av_freep(&buffer);
return AVERROR_INVALIDDATA;
}
if (metadata_size != FLAC_STREAMINFO_SIZE) {
av_freep(&buffer);
return AVERROR_INVALIDDATA;
}
found_streaminfo = 1;
st->codec->extradata = buffer;
st->codec->extradata_size = metadata_size;
buffer = NULL;
/* get codec params from STREAMINFO header */
ff_flac_parse_streaminfo(st->codec, &si, st->codec->extradata);
/* set time base and duration */
if (si.samplerate > 0) {
av_set_pts_info(st, 64, 1, si.samplerate);
if (si.samples > 0)
st->duration = si.samples;
}
} else {
/* STREAMINFO must be the first block */
if (!found_streaminfo) {
av_freep(&buffer);
return AVERROR_INVALIDDATA;
}
/* process supported blocks other than STREAMINFO */
if (metadata_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
if (vorbis_comment(s, buffer, metadata_size)) {
av_log(s, AV_LOG_WARNING, "error parsing VorbisComment metadata\n");
}
}
av_freep(&buffer);
}
}
return 0;
}

22
tests/seek.regression.ref
View File

@@ -585,31 +585,31 @@ ret: 0 st: 0 dts:0.480000 pts:0.480000 pos:796840 size:67971 flags:1
ret:-1 st:-1 ts:-0.645825 flags:1
----------------
tests/data/a-flac.flac
ret: 0 st: 0 dts:-102481911520608.625000 pts:-102481911520608.625000 pos:0 size:1024 flags:1
ret: 0 st: 0 dts:-209146758205323.718750 pts:-209146758205323.718750 pos:42 size:1024 flags:1
ret:-1 st:-1 ts:-1.000000 flags:0
ret:-1 st:-1 ts:1.894167 flags:1
ret:-1 st: 0 ts:0.788333 flags:0
ret:-1 st: 0 ts:-0.317500 flags:1
ret:-1 st: 0 ts:0.788345 flags:0
ret:-1 st: 0 ts:-0.317506 flags:1
ret:-1 st:-1 ts:2.576668 flags:0
ret:-1 st:-1 ts:1.470835 flags:1
ret:-1 st: 0 ts:0.365000 flags:0
ret:-1 st: 0 ts:-0.740833 flags:1
ret:-1 st: 0 ts:0.365011 flags:0
ret:-1 st: 0 ts:-0.740839 flags:1
ret:-1 st:-1 ts:2.153336 flags:0
ret:-1 st:-1 ts:1.047503 flags:1
ret:-1 st: 0 ts:-0.058333 flags:0
ret:-1 st: 0 ts:2.835833 flags:1
ret:-1 st: 0 ts:-0.058322 flags:0
ret:-1 st: 0 ts:2.835828 flags:1
ret:-1 st:-1 ts:1.730004 flags:0
ret:-1 st:-1 ts:0.624171 flags:1
ret:-1 st: 0 ts:-0.481667 flags:0
ret:-1 st: 0 ts:2.412500 flags:1
ret:-1 st: 0 ts:-0.481655 flags:0
ret:-1 st: 0 ts:2.412494 flags:1
ret:-1 st:-1 ts:1.306672 flags:0
ret:-1 st:-1 ts:0.200839 flags:1
ret:-1 st: 0 ts:-0.904989 flags:0
ret:-1 st: 0 ts:1.989178 flags:1
ret:-1 st: 0 ts:1.989184 flags:1
ret:-1 st:-1 ts:0.883340 flags:0
ret:-1 st:-1 ts:-0.222493 flags:1
ret:-1 st: 0 ts:2.671678 flags:0
ret:-1 st: 0 ts:1.565844 flags:1
ret:-1 st: 0 ts:1.565850 flags:1
ret:-1 st:-1 ts:0.460008 flags:0
ret:-1 st:-1 ts:-0.645825 flags:1
----------------