From a5ad3c2382ac27cf712aaba6a222ec12f5eb88da Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sun, 3 Jun 2012 17:12:26 +0200
Subject: [PATCH] av_get_audio_frame_duration: fix FPE
Fixes ticket1392
Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
libavcodec/utils.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 6b6586305f1..5d3fafea658 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -2199,8 +2199,12 @@ int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
/* calc from frame_bytes, channels, and bits_per_coded_sample */
switch (avctx->codec_id) {
case CODEC_ID_PCM_DVD:
+ if(bps<4)
+ return 0;
return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
case CODEC_ID_PCM_BLURAY:
+ if(bps<4)
+ return 0;
return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
case CODEC_ID_S302M:
return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
--
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