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avcodec/pixlet: make sure scaling factors are not zero

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2016-12-24 10:31:43 +01:00
parent ab31b46b89
commit 6cedd20b97
1 changed files with 8 additions and 2 deletions
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10
libavcodec/pixlet.c
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@ -504,8 +504,14 @@ static int decode_plane(AVCodecContext *avctx, int plane, AVPacket *avpkt, AVFra
int i, ret;
for (i = ctx->levels - 1; i >= 0; i--) {
ctx->scaling[plane][H][i] = 1000000.0f / sign_extend(bytestream2_get_be32(&ctx->gb), 32);
ctx->scaling[plane][V][i] = 1000000.0f / sign_extend(bytestream2_get_be32(&ctx->gb), 32);
int32_t h = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
int32_t v = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
if (!h || !v)
return AVERROR_INVALIDDATA;
ctx->scaling[plane][H][i] = 1000000.0f / h;
ctx->scaling[plane][V][i] = 1000000.0f / v;
}
bytestream2_skip(&ctx->gb, 4);