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swscale: make DITHER_COPY() support non native endian source 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-05-10 00:06:36 +02:00
parent 9c49ca0f19
commit eb8aa13b54
1 changed files with 13 additions and 12 deletions
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25
libswscale/swscale.c
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@ -1857,22 +1857,22 @@ static int packedCopyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[
return srcSliceH;
}
#define DITHER_COPY(dst, dstStride, src, srcStride)\
#define DITHER_COPY(dst, dstStride, src, srcStride, bswap)\
for (i = 0; i < height; i++) {\
int shift= src_depth-dst_depth;\
uint8_t *dither= dithers[src_depth-9][i&7];\
for (j = 0; j < length-7; j+=8){\
dst[j+0] = (src[j+0] + dither[0])>>shift;\
dst[j+1] = (src[j+1] + dither[1])>>shift;\
dst[j+2] = (src[j+2] + dither[2])>>shift;\
dst[j+3] = (src[j+3] + dither[3])>>shift;\
dst[j+4] = (src[j+4] + dither[4])>>shift;\
dst[j+5] = (src[j+5] + dither[5])>>shift;\
dst[j+6] = (src[j+6] + dither[6])>>shift;\
dst[j+7] = (src[j+7] + dither[7])>>shift;\
dst[j+0] = (bswap(src[j+0]) + dither[0])>>shift;\
dst[j+1] = (bswap(src[j+1]) + dither[1])>>shift;\
dst[j+2] = (bswap(src[j+2]) + dither[2])>>shift;\
dst[j+3] = (bswap(src[j+3]) + dither[3])>>shift;\
dst[j+4] = (bswap(src[j+4]) + dither[4])>>shift;\
dst[j+5] = (bswap(src[j+5]) + dither[5])>>shift;\
dst[j+6] = (bswap(src[j+6]) + dither[6])>>shift;\
dst[j+7] = (bswap(src[j+7]) + dither[7])>>shift;\
}\
for (; j < length; j++)\
dst[j] = (src[j] + dither[j&7])>>shift;\
dst[j] = (bswap(src[j]) + dither[j&7])>>shift;\
dst += dstStride;\
src += srcStride;\
}
@ -1904,7 +1904,7 @@ static int planarCopyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[
uint16_t *dstPtr2 = (uint16_t*)dstPtr;
if (dst_depth == 8) {
DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2)
DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, )
} else if (src_depth == 8) {
for (i = 0; i < height; i++) {
for (j = 0; j < length; j++)
@ -1928,7 +1928,8 @@ static int planarCopyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[
srcPtr2 += srcStride[plane]/2;
}
} else {
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2)
//FIXME non native endian
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, )
}
} else if(is16BPS(c->srcFormat) && !is16BPS(c->dstFormat)) {
//FIXME add dither