[FFmpeg-cvslog] lavfi/showspectrum: fix crash in case of negative linesize
Paul B Mahol
git at videolan.org
Mon Apr 29 21:32:37 CEST 2013
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Mon Apr 29 13:31:04 2013 +0000| [32d464121959389bd266abe232896da09bbf2bd5] | committer: Paul B Mahol
lavfi/showspectrum: fix crash in case of negative linesize
Signed-off-by: Paul B Mahol <onemda at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=32d464121959389bd266abe232896da09bbf2bd5
---
libavfilter/avf_showspectrum.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index 058f22c..7cd75df 100644
--- a/libavfilter/avf_showspectrum.c
+++ b/libavfilter/avf_showspectrum.c
@@ -211,9 +211,11 @@ static int config_output(AVFilterLink *outlink)
if (!outpicref)
return AVERROR(ENOMEM);
outlink->sample_aspect_ratio = (AVRational){1,1};
- memset(outpicref->data[0], 0, outlink->h * outpicref->linesize[0]);
- memset(outpicref->data[1], 128, outlink->h * outpicref->linesize[1]);
- memset(outpicref->data[2], 128, outlink->h * outpicref->linesize[2]);
+ for (i = 0; i < outlink->h; i++) {
+ memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w);
+ memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w);
+ memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w);
+ }
}
if (showspectrum->xpos >= outlink->w)
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