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Code Issues Releases Activity

Fix overflows in bicubic interpolation.

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Originally committed as revision 5868 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2006-07-31 03:32:59 +00:00
parent 5b01f9ce47
commit a70c27e813
1 changed files with 3 additions and 3 deletions
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6
libavcodec/vc1dsp.c
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@ -314,7 +314,7 @@ static void vc1_inv_trans_4x4_c(DCTELEM block[64], int n)
/** Filter used to interpolate fractional pel values /** Filter used to interpolate fractional pel values
*/ */
static always_inline uint8_t vc1_mspel_filter(const uint8_t *src, int stride, int mode, int r) static always_inline int vc1_mspel_filter(const uint8_t *src, int stride, int mode, int r)
{ {
switch(mode){ switch(mode){
case 0: //no shift case 0: //no shift
@ -343,7 +343,7 @@ static void vc1_mspel_mc(uint8_t *dst, const uint8_t *src, int stride, int mode,
tptr = tmp; tptr = tmp;
for(j = 0; j < 11; j++) { for(j = 0; j < 11; j++) {
for(i = 0; i < 8; i++) for(i = 0; i < 8; i++)
tptr[i] = vc1_mspel_filter(src + i, 1, m, r); tptr[i] = clip_uint8(vc1_mspel_filter(src + i, 1, m, r));
src += stride; src += stride;
tptr += 8; tptr += 8;
} }
@ -353,7 +353,7 @@ static void vc1_mspel_mc(uint8_t *dst, const uint8_t *src, int stride, int mode,
tptr = tmp + 8; tptr = tmp + 8;
for(j = 0; j < 8; j++) { for(j = 0; j < 8; j++) {
for(i = 0; i < 8; i++) for(i = 0; i < 8; i++)
dst[i] = vc1_mspel_filter(tptr + i, 8, m, r); dst[i] = clip_uint8(vc1_mspel_filter(tptr + i, 8, m, r));
dst += stride; dst += stride;
tptr += 8; tptr += 8;
} }