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avformat/vag: fix demuxing stereo files 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-10-17 20:00:35 +02:00
parent c38a6077ee
commit c37d2cd01c
1 changed files with 17 additions and 17 deletions
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32
libavformat/vag.c
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@ -23,10 +23,6 @@
#include "avformat.h"
#include "internal.h"
typedef struct VAGDemuxContext {
int64_t data_end;
} VAGDemuxContext;
static int vag_probe(AVProbeData *p)
{
if (memcmp(p->buf, "VAGp\0\0\0", 7))
@ -37,8 +33,8 @@ static int vag_probe(AVProbeData *p)
static int vag_read_header(AVFormatContext *s)
{
VAGDemuxContext *c = s->priv_data;
AVStream *st;
int64_t pos;
st = avformat_new_stream(s, NULL);
if (!st)
@ -49,13 +45,24 @@ static int vag_read_header(AVFormatContext *s)
st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX;
st->codec->channels = 1 + (avio_rb32(s->pb) == 0x00000004);
avio_skip(s->pb, 4);
c->data_end = avio_rb32(s->pb);
st->duration = (c->data_end - avio_tell(s->pb)) / (16 * st->codec->channels) * 28;
if (st->codec->channels > 1) {
st->duration = avio_rb32(s->pb);
} else {
st->duration = avio_rb32(s->pb) / 16 * 28;
}
st->codec->sample_rate = avio_rb32(s->pb);
if (st->codec->sample_rate <= 0)
return AVERROR_INVALIDDATA;
pos = avio_tell(s->pb);
avio_seek(s->pb, 0x1000, SEEK_SET);
if (avio_rl32(s->pb) == MKTAG('V','A','G','p')) {
st->codec->block_align = 0x1000 * st->codec->channels;
avio_seek(s->pb, 0, SEEK_SET);
st->duration = st->duration / 16 * 28;
} else {
st->codec->block_align = 16 * st->codec->channels;
avio_skip(s->pb, 28);
avio_seek(s->pb, st->codec->channels > 1 ? 0x80 : 0x30, SEEK_SET);
}
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
return 0;
@ -63,21 +70,14 @@ static int vag_read_header(AVFormatContext *s)
static int vag_read_packet(AVFormatContext *s, AVPacket *pkt)
{
VAGDemuxContext *c = s->priv_data;
AVCodecContext *codec = s->streams[0]->codec;
int size;
size = FFMIN(c->data_end - avio_tell(s->pb), codec->block_align);
if (size <= 0)
return AVERROR_EOF;
return av_get_packet(s->pb, pkt, size);
return av_get_packet(s->pb, pkt, codec->block_align);
}
AVInputFormat ff_vag_demuxer = {
.name = "vag",
.long_name = NULL_IF_CONFIG_SMALL("Sony VAG"),
.priv_data_size = sizeof(VAGDemuxContext),
.read_probe = vag_probe,
.read_header = vag_read_header,
.read_packet = vag_read_packet,