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avformat/au: improve au_probe()

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This commit is contained in:
Paul B Mahol 2023-08-11 23:48:39 +02:00
parent d53acf452f
commit 97741adf6f
1 changed files with 9 additions and 4 deletions
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13
libavformat/au.c
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@ -30,6 +30,7 @@
#include "config_components.h" #include "config_components.h"
#include "libavutil/bprint.h" #include "libavutil/bprint.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h" #include "avformat.h"
#include "internal.h" #include "internal.h"
#include "avio_internal.h" #include "avio_internal.h"
@ -63,11 +64,15 @@ static const AVCodecTag *const au_codec_tags[] = { codec_au_tags, NULL };
static int au_probe(const AVProbeData *p) static int au_probe(const AVProbeData *p)
{ {
if (p->buf[0] == '.' && p->buf[1] == 's' && if (p->buf_size < 24 ||
p->buf[2] == 'n' && p->buf[3] == 'd') AV_RL32(p->buf) != MKTAG('.', 's', 'n', 'd') ||
return AVPROBE_SCORE_MAX; AV_RN32(p->buf+4) == 0 ||
else AV_RN32(p->buf+8) == 0 ||
AV_RN32(p->buf+12) == 0 ||
AV_RN32(p->buf+16) == 0 ||
AV_RN32(p->buf+20) == 0)
return 0; return 0;
return AVPROBE_SCORE_MAX;
} }
static int au_read_annotation(AVFormatContext *s, int size) static int au_read_annotation(AVFormatContext *s, int size)