[FFmpeg-devel] [PATCH 3/3] pngdec: Do not use SIMD paeth prediction for bpp=2

Michael Niedermayer michaelni at gmx.at
Thu Jan 19 20:55:44 CET 2012


Fixes decoding of basi4a08.png

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
---
 libavcodec/pngdec.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 1913f51..4e83eaa 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -240,7 +240,7 @@ static void png_filter_row(PNGDecContext *s, uint8_t *dst, int filter_type,
             p = last[i];
             dst[i] = p + src[i];
         }
-        if(bpp > 1 && size > 4) {
+        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;
             s->add_paeth_prediction(dst+i, src+i, last+i, w-i, bpp);
-- 
1.7.5.4



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