avcodec/pngdec: handle 4 more bytes with SIMD for RGB64 in paeth prediction

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
pull/101/head
Michael Niedermayer 10 years ago
parent ed9be7dd47
commit 82a60de3b7
  1. 3
      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;

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