From feb15cee5e19a1e31d075ec08d598d64c2dc38ef Mon Sep 17 00:00:00 2001
From: Shitiz Garg <mail@dragooon.net>
Date: Fri, 16 Dec 2011 00:36:27 +0530
Subject: [PATCH] mtv: Make sure audio_subsegments is not 0
audio_subsegments would be 0 and cause floating point exceptions
Fixes bugzilla #144
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
---
libavformat/mtv.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavformat/mtv.c b/libavformat/mtv.c
index c3fb15c3449..4c3b082881c 100644
--- a/libavformat/mtv.c
+++ b/libavformat/mtv.c
@@ -106,6 +106,12 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
avio_skip(pb, 4);
audio_subsegments = avio_rl16(pb);
+
+ if (audio_subsegments == 0) {
+ av_log_ask_for_sample(s, "MTV files without audio are not supported\n");
+ return AVERROR_INVALIDDATA;
+ }
+
mtv->full_segment_size =
audio_subsegments * (MTV_AUDIO_PADDING_SIZE + MTV_ASUBCHUNK_DATA_SIZE) +
mtv->img_segment_size;
--
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