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mp3dec: fix reading the Xing tag 

The quality scale field is only supposed to be present if the fourth bit
is set. In practice, lame always sets it, but other tools might not.

CC:libav-stable@libav.org
This commit is contained in:
Anton Khirnov 2014-10-18 16:25:16 +02:00
parent 6df9d9b55d
commit 99143140de
1 changed files with 3 additions and 1 deletions
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4
libavformat/mp3dec.c
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@ -36,6 +36,7 @@
#define XING_FLAG_FRAMES 0x01
#define XING_FLAG_SIZE 0x02
#define XING_FLAG_TOC 0x04
#define XING_FLAC_QSCALE 0x08
#define XING_TOC_COUNT 100
@ -165,7 +166,8 @@ static void mp3_parse_info_tag(AVFormatContext *s, AVStream *st,
st->time_base));
/* VBR quality */
avio_rb32(s->pb);
if (v & XING_FLAC_QSCALE)
avio_rb32(s->pb);
/* Encoder short version string */
memset(version, 0, sizeof(version));