Signed-off-by: Michael Niedermayer <michae...@gmx.at>
---
libavcodec/pngdec.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 293c7db..9b488b7 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -272,7 +272,8 @@ static void png_filter_row(PNGDSPContext *dsp, uint8_t
*dst, int filter_type,
if (bpp > 2 && size > 4) {
/* would write off the end of the array if we let it process
* the last pixel with bpp=3 */
- int w = bpp == 4 ? size : size - 3;
+ int w = (bpp & 3) ? size - 3 : size;
+
if (w > i) {
dsp->add_paeth_prediction(dst + i, src + i, last + i, size -
i, bpp);
i = w;
--
1.7.9.5
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