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lavfi/showspectrum: fix crash in case of negative linesize 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-04-29 13:31:04 +00:00
parent 22a86492ec
commit 32d4641219
1 changed files with 5 additions and 3 deletions
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8
libavfilter/avf_showspectrum.c
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@ -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)