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avformat/wavdec: Remove direct s->pb->buffer access

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-04-03 02:15:06 +02:00
parent fcbdc44f4e
commit cf4d050b72
1 changed files with 24 additions and 2 deletions
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26
libavformat/wavdec.c
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@ -64,12 +64,34 @@ static void set_spdif(AVFormatContext *s, WAVDemuxContext *wav)
{
if (CONFIG_SPDIF_DEMUXER && s->streams[0]->codec->codec_tag == 1) {
enum AVCodecID codec;
int ret = ff_spdif_probe(s->pb->buffer, s->pb->buf_end - s->pb->buffer,
&codec);
uint8_t *buf = NULL;
int ret = ffio_ensure_seekback(s->pb, sizeof(buf));
int len = 1<<16;
int64_t pos = avio_tell(s->pb);
if (ret < 0)
goto end;
buf = av_malloc(len);
if (!buf) {
ret = AVERROR(ENOMEM);
goto end;
}
len = ret = avio_read(s->pb, buf, len);
if (ret < 0)
goto end;
ret = ff_spdif_probe(buf, len, &codec);
if (ret > AVPROBE_SCORE_EXTENSION) {
s->streams[0]->codec->codec_id = codec;
wav->spdif = 1;
}
end:
avio_seek(s->pb, pos, SEEK_SET);
if (ret < 0)
av_log(s, AV_LOG_WARNING, "Cannot check for SPDIF\n");
av_free(buf);
}
}