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Factor tag reading code out of wav read_header()

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Originally committed as revision 26369 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2011-01-15 17:13:30 +00:00
parent 925aa96915
commit 724b1f6a05
1 changed files with 8 additions and 2 deletions
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10
libavformat/wav.c
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@ -140,6 +140,13 @@ AVOutputFormat wav_muxer = {
#if CONFIG_WAV_DEMUXER #if CONFIG_WAV_DEMUXER
static int64_t next_tag(ByteIOContext *pb, unsigned int *tag)
{
*tag = get_le32(pb);
return get_le32(pb);
}
/* return the size of the found tag */ /* return the size of the found tag */
static int64_t find_tag(ByteIOContext *pb, uint32_t tag1) static int64_t find_tag(ByteIOContext *pb, uint32_t tag1)
{ {
@ -149,8 +156,7 @@ static int64_t find_tag(ByteIOContext *pb, uint32_t tag1)
for (;;) { for (;;) {
if (url_feof(pb)) if (url_feof(pb))
return -1; return -1;
tag = get_le32(pb); size = next_tag(pb, &tag);
size = get_le32(pb);
if (tag == tag1) if (tag == tag1)
break; break;
url_fseek(pb, size, SEEK_CUR); url_fseek(pb, size, SEEK_CUR);