AltiVec operations need to have memory aligned on 16-byte boundaries.

patch by Alan Curry, pacman at world dot std dot com

Originally committed as revision 17559 to svn://svn.mplayerhq.hu/mplayer/trunk/postproc

1 files changed, 5 insertions, 3 deletions

diff --git a/postproc/swscale.c b/postproc/swscale.c
index fbdedaecd3..2b0d585b1a 100644
--- a/postproc/swscale.c
+++ b/postproc/swscale.c
@@ -1166,7 +1166,8 @@ static inline void initFilter(int16_t **outFilter, int16_t **filterPos, int *out
 	}
 
 	// Note the +1 is for the MMXscaler which reads over the end
-	*outFilter= (int16_t*)memalign(8, *outFilterSize*(dstW+1)*sizeof(int16_t));
+	/* align at 16 for AltiVec (needed by hScale_altivec_real) */
+	*outFilter= (int16_t*)memalign(16, *outFilterSize*(dstW+1)*sizeof(int16_t));
 	memset(*outFilter, 0, *outFilterSize*(dstW+1)*sizeof(int16_t));
 
 	/* Normalize & Store in outFilter */
@@ -2132,10 +2133,11 @@ SwsContext *sws_getContext(int srcW, int srcH, int origSrcFormat, int dstW, int
 	c->lumPixBuf= (int16_t**)memalign(4, c->vLumBufSize*2*sizeof(int16_t*));
 	c->chrPixBuf= (int16_t**)memalign(4, c->vChrBufSize*2*sizeof(int16_t*));
 	//Note we need at least one pixel more at the end because of the mmx code (just in case someone wanna replace the 4000/8000)
+	/* align at 16 bytes for AltiVec */
 	for(i=0; i<c->vLumBufSize; i++)
-		c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= (uint16_t*)memalign(8, 4000);
+		c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= (uint16_t*)memalign(16, 4000);
 	for(i=0; i<c->vChrBufSize; i++)
-		c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= (uint16_t*)memalign(8, 8000);
+		c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= (uint16_t*)memalign(16, 8000);
 
 	//try to avoid drawing green stuff between the right end and the stride end
 	for(i=0; i<c->vLumBufSize; i++) memset(c->lumPixBuf[i], 0, 4000);