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lavf: stop using avpriv_flac_parse_streaminfo() 

The only parameters needed by the demuxers are the sample rate and sample
count, which can be trivially extracted manually, without resorting to
an avpriv function.
This commit is contained in:
Anton Khirnov 2014-08-28 10:13:25 +00:00
parent 56dc46a189
commit 7784f47762
3 changed files with 19 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
libavcodec/Makefile
View File

@ -567,8 +567,6 @@ OBJS-$(CONFIG_VC1_VDPAU_HWACCEL) += vdpau_vc1.o
OBJS-$(CONFIG_ADTS_MUXER) += mpeg4audio.o
OBJS-$(CONFIG_CAF_DEMUXER) += mpeg4audio.o mpegaudiodata.o \
ac3tab.o
OBJS-$(CONFIG_FLAC_DEMUXER) += flac.o flacdata.o \
xiph.o
OBJS-$(CONFIG_FLAC_MUXER) += flac.o flacdata.o
OBJS-$(CONFIG_FLV_DEMUXER) += mpeg4audio.o
OBJS-$(CONFIG_GXF_DEMUXER) += mpeg12data.o
@ -588,7 +586,7 @@ OBJS-$(CONFIG_MOV_MUXER) += mpeg4audio.o mpegaudiodata.o
OBJS-$(CONFIG_MPEGTS_MUXER) += mpeg4audio.o
OBJS-$(CONFIG_MPEGTS_DEMUXER) += mpeg4audio.o mpegaudiodata.o
OBJS-$(CONFIG_NUT_MUXER) += mpegaudiodata.o
OBJS-$(CONFIG_OGG_DEMUXER) += xiph.o flac.o flacdata.o \
OBJS-$(CONFIG_OGG_DEMUXER) += xiph.o \
mpeg12data.o \
dirac.o
OBJS-$(CONFIG_OGG_MUXER) += xiph.o flac.o flacdata.o

19
libavformat/flacdec.c
View File

@ -27,7 +27,6 @@
#include "oggdec.h"
#include "vorbiscomment.h"
#include "replaygain.h"
#include "libavcodec/bytestream.h"
static int flac_read_header(AVFormatContext *s)
{
@ -76,7 +75,9 @@ static int flac_read_header(AVFormatContext *s)
}
if (metadata_type == FLAC_METADATA_TYPE_STREAMINFO) {
FLACStreaminfo si;
uint32_t samplerate;
uint64_t samples;
/* STREAMINFO can only occur once */
if (found_streaminfo) {
av_freep(&buffer);
@ -91,14 +92,16 @@ static int flac_read_header(AVFormatContext *s)
st->codec->extradata_size = metadata_size;
buffer = NULL;
/* get codec params from STREAMINFO header */
avpriv_flac_parse_streaminfo(st->codec, &si, st->codec->extradata);
/* get sample rate and sample count from STREAMINFO header;
* other parameters will be extracted by the parser */
samplerate = AV_RB24(st->codec->extradata + 10) >> 4;
samples = (AV_RB64(st->codec->extradata + 13) >> 24) & ((1ULL << 36) - 1);
/* set time base and duration */
if (si.samplerate > 0) {
avpriv_set_pts_info(st, 64, 1, si.samplerate);
if (si.samples > 0)
st->duration = si.samples;
if (samplerate > 0) {
avpriv_set_pts_info(st, 64, 1, samplerate);
if (samples > 0)
st->duration = samples;
}
} else if (metadata_type == FLAC_METADATA_TYPE_CUESHEET) {
uint8_t isrc[13];

11
libavformat/oggparseflac.c
View File

@ -34,7 +34,6 @@ flac_header (AVFormatContext * s, int idx)
struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
GetBitContext gb;
FLACStreaminfo si;
int mdt;
if (os->buf[os->pstart] == 0xff)
@ -46,6 +45,8 @@ flac_header (AVFormatContext * s, int idx)
if (mdt == OGG_FLAC_METADATA_TYPE_STREAMINFO) {
uint8_t *streaminfo_start = os->buf + os->pstart + 5 + 4 + 4 + 4;
uint32_t samplerate;
skip_bits_long(&gb, 4*8); /* "FLAC" */
if(get_bits(&gb, 8) != 1) /* unsupported major version */
return -1;
@ -56,8 +57,6 @@ flac_header (AVFormatContext * s, int idx)
if (get_bits_long(&gb, 32) != FLAC_STREAMINFO_SIZE)
return -1;
avpriv_flac_parse_streaminfo(st->codec, &si, streaminfo_start);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = AV_CODEC_ID_FLAC;
st->need_parsing = AVSTREAM_PARSE_HEADERS;
@ -67,7 +66,11 @@ flac_header (AVFormatContext * s, int idx)
memcpy(st->codec->extradata, streaminfo_start, FLAC_STREAMINFO_SIZE);
st->codec->extradata_size = FLAC_STREAMINFO_SIZE;
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
samplerate = AV_RB24(st->codec->extradata + 10) >> 4;
if (!samplerate)
return AVERROR_INVALIDDATA;
avpriv_set_pts_info(st, 64, 1, samplerate);
} else if (mdt == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 4, os->psize - 4);
}