From: Michael Niedermayer <mich...@niedermayer.cc>
Fixes potential division by zero
Fixes: CID1292295
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavfilter/avf_showwaves.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavfilter/avf_showwaves.c b/libavfilter/avf_showwaves.c
index 57a6b2e..a19acf5 100644
--- a/libavfilter/avf_showwaves.c
+++ b/libavfilter/avf_showwaves.c
@@ -203,6 +203,11 @@ static int push_single_pic(AVFilterLink *outlink)
int col = 0;
int64_t *sum = showwaves->sum;
+ if (max_samples == 0) {
+ av_log(ctx, AV_LOG_ERROR, "Too few samples\n");
+ return AVERROR(EINVAL);
+ }
+
av_log(ctx, AV_LOG_DEBUG, "Create frame averaging %"PRId64" samples per
column\n", max_samples);
memset(sum, 0, nb_channels);
--
1.7.9.5
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