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swscale: factorize plane copying code out of 2 functions 

Originally committed as revision 32257 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
This commit is contained in:
Ramiro Polla 2010-09-16 01:07:55 +00:00
parent f1084cb0cd
commit cf1cd520c6
1 changed files with 26 additions and 30 deletions
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56
libswscale/swscale.c
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@ -1308,24 +1308,33 @@ SwsFunc ff_getSwsFunc(SwsContext *c)
#endif //!CONFIG_RUNTIME_CPUDETECT #endif //!CONFIG_RUNTIME_CPUDETECT
} }
static void copyPlane(const uint8_t *src, int srcStride,
int srcSliceY, int srcSliceH, int width,
uint8_t *dst, int dstStride)
{
dst += dstStride * srcSliceY;
if (dstStride == srcStride && srcStride > 0) {
memcpy(dst, src, srcSliceH * dstStride);
} else {
int i;
const uint8_t *srcPtr = src;
uint8_t *dstPtr= dst;
for (i=0; i<srcSliceH; i++) {
memcpy(dstPtr, srcPtr, width);
srcPtr += srcStride;
dstPtr += dstStride;
}
}
}
static int planarToNv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY, static int planarToNv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dstParam[], int dstStride[]) int srcSliceH, uint8_t* dstParam[], int dstStride[])
{ {
uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY; uint8_t *dst = dstParam[1] + dstStride[1]*srcSliceY/2;
/* Copy Y plane */
if (dstStride[0]==srcStride[0] && srcStride[0] > 0) copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
memcpy(dst, src[0], srcSliceH*dstStride[0]); dstParam[0], dstStride[0]);
else {
int i;
const uint8_t *srcPtr= src[0];
uint8_t *dstPtr= dst;
for (i=0; i<srcSliceH; i++) {
memcpy(dstPtr, srcPtr, c->srcW);
srcPtr+= srcStride[0];
dstPtr+= dstStride[0];
}
}
dst = dstParam[1] + dstStride[1]*srcSliceY/2;
if (c->dstFormat == PIX_FMT_NV12) if (c->dstFormat == PIX_FMT_NV12)
interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]); interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);
else else
@ -1583,21 +1592,8 @@ static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride
static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY, static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dst[], int dstStride[]) int srcSliceH, uint8_t* dst[], int dstStride[])
{ {
int i; copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
dst[0], dstStride[0]);
/* copy Y */
if (srcStride[0]==dstStride[0] && srcStride[0] > 0)
memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);
else {
const uint8_t *srcPtr= src[0];
uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
for (i=0; i<srcSliceH; i++) {
memcpy(dstPtr, srcPtr, c->srcW);
srcPtr+= srcStride[0];
dstPtr+= dstStride[0];
}
}
planar2x(src[1], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW, planar2x(src[1], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,
srcSliceH >> 2, srcStride[1], dstStride[1]); srcSliceH >> 2, srcStride[1], dstStride[1]);