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au: reuse the result of the previous call to av_get_bits_per_sample()

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Avoid an unnecessary call to the function, slighlty more
robust/readable.
This commit is contained in:
Stefano Sabatini 2011-07-18 14:02:07 +02:00
parent 633aa01f72
commit daa6237229
1 changed files with 3 additions and 3 deletions
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6
libavformat/au.c
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@ -120,7 +120,7 @@ static int au_probe(AVProbeData *p)
static int au_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
int size, data_size = 0;
int size, bps, data_size = 0;
unsigned int tag;
AVIOContext *pb = s->pb;
unsigned int id, channels, rate;
@ -145,7 +145,7 @@ static int au_read_header(AVFormatContext *s,
codec = ff_codec_get_id(codec_au_tags, id);
if (!av_get_bits_per_sample(codec)) {
if (!(bps = av_get_bits_per_sample(codec))) {
av_log_ask_for_sample(s, "could not determine bits per sample\n");
return AVERROR_INVALIDDATA;
}
@ -164,7 +164,7 @@ static int au_read_header(AVFormatContext *s,
st->codec->codec_id = codec;
st->codec->channels = channels;
st->codec->sample_rate = rate;
st->duration = (((int64_t)data_size)<<3) / (st->codec->channels * av_get_bits_per_sample(codec));
st->duration = (((int64_t)data_size)<<3) / (st->codec->channels * bps);
av_set_pts_info(st, 64, 1, rate);
return 0;
}