diff options
Diffstat (limited to 'postproc/swscale.c')
| -rw-r--r-- | postproc/swscale.c | 42 |
1 files changed, 33 insertions, 9 deletions
diff --git a/postproc/swscale.c b/postproc/swscale.c index 38284a19f5..dd10521582 100644 --- a/postproc/swscale.c +++ b/postproc/swscale.c @@ -1041,6 +1041,21 @@ static inline void initFilter(int16_t **outFilter, int16_t **filterPos, int *out if(min>minFilterSize) minFilterSize= min; } + if (flags & SWS_CPU_CAPS_ALTIVEC) { + // we can handle the special case 4, + // so we don't want to go to the full 8 + if (minFilterSize < 5) + filterAlign = 4; + + // we really don't want to waste our time + // doing useless computation, so fall-back on + // the scalar C code for very small filter. + // vectorizing is worth it only if you have + // decent-sized vector. + if (minFilterSize < 3) + filterAlign = 1; + } + ASSERT(minFilterSize > 0) filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1)); ASSERT(filterSize > 0) @@ -1947,7 +1962,10 @@ SwsContext *sws_getContext(int srcW, int srcH, int origSrcFormat, int dstW, int /* precalculate horizontal scaler filter coefficients */ { - const int filterAlign= (flags & SWS_CPU_CAPS_MMX) ? 4 : 1; + const int filterAlign= + (flags & SWS_CPU_CAPS_MMX) ? 4 : + (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 : + 1; initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc, srcW , dstW, filterAlign, 1<<14, @@ -1976,14 +1994,20 @@ SwsContext *sws_getContext(int srcW, int srcH, int origSrcFormat, int dstW, int /* precalculate vertical scaler filter coefficients */ - initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc, - srcH , dstH, 1, (1<<12)-4, - (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, - srcFilter->lumV, dstFilter->lumV); - initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc, - c->chrSrcH, c->chrDstH, 1, (1<<12)-4, - (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, - srcFilter->chrV, dstFilter->chrV); + { + const int filterAlign= + (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 : + 1; + + initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc, + srcH , dstH, filterAlign, (1<<12)-4, + (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, + srcFilter->lumV, dstFilter->lumV); + initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc, + c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4, + (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, + srcFilter->chrV, dstFilter->chrV); + } // Calculate Buffer Sizes so that they won't run out while handling these damn slices c->vLumBufSize= c->vLumFilterSize; |