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swscale: Add support for unscaled 8-bit Packed RGB -> Planar RGB 

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
This commit is contained in:
Derek Buitenhuis 2012-09-22 01:34:17 +00:00
parent ebc701993f
commit 57c4c25596
1 changed files with 78 additions and 0 deletions
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78
libswscale/swscale_unscaled.c
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@ -468,6 +468,80 @@ static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t *src[],
return srcSliceH;
}
static void packedtogbr24p(const uint8_t *src, int srcStride,
uint8_t *dst[], int dstStride[], int srcSliceH,
int alpha_first, int inc_size, int width)
{
uint8_t *dest[3];
int x, h;
dest[0] = dst[0];
dest[1] = dst[1];
dest[2] = dst[2];
if (alpha_first)
src++;
for (h = 0; h < srcSliceH; h++) {
for (x = 0; x < width; x++) {
dest[0][x] = src[0];
dest[1][x] = src[1];
dest[2][x] = src[2];
src += inc_size;
}
src += srcStride - width * inc_size;
dest[0] += dstStride[0];
dest[1] += dstStride[1];
dest[2] += dstStride[2];
}
}
static int rgbToPlanarRgbWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
int alpha_first = 0;
int stride102[] = { dstStride[1], dstStride[0], dstStride[2] };
int stride201[] = { dstStride[2], dstStride[0], dstStride[1] };
uint8_t *dst102[] = { dst[1] + srcSliceY * dstStride[1],
dst[0] + srcSliceY * dstStride[0],
dst[2] + srcSliceY * dstStride[2] };
uint8_t *dst201[] = { dst[2] + srcSliceY * dstStride[2],
dst[0] + srcSliceY * dstStride[0],
dst[1] + srcSliceY * dstStride[1] };
switch (c->srcFormat) {
case PIX_FMT_RGB24:
packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
stride201, srcSliceH, alpha_first, 3, c->srcW);
break;
case PIX_FMT_BGR24:
packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
stride102, srcSliceH, alpha_first, 3, c->srcW);
break;
case PIX_FMT_ARGB:
alpha_first = 1;
case PIX_FMT_RGBA:
packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
stride201, srcSliceH, alpha_first, 4, c->srcW);
break;
case PIX_FMT_ABGR:
alpha_first = 1;
case PIX_FMT_BGRA:
packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
stride102, srcSliceH, alpha_first, 4, c->srcW);
break;
default:
av_log(c, AV_LOG_ERROR,
"unsupported planar RGB conversion %s -> %s\n",
av_get_pix_fmt_name(c->srcFormat),
av_get_pix_fmt_name(c->dstFormat));
}
return srcSliceH;
}
#define isRGBA32(x) ( \
(x) == AV_PIX_FMT_ARGB \
|| (x) == AV_PIX_FMT_RGBA \
@ -943,6 +1017,10 @@ void ff_get_unscaled_swscale(SwsContext *c)
if (srcFormat == AV_PIX_FMT_GBRP && isPlanar(srcFormat) && isByteRGB(dstFormat))
c->swScale = planarRgbToRgbWrapper;
if (av_pix_fmt_desc_get(srcFormat)->comp[0].depth_minus1 == 7 &&
isPackedRGB(srcFormat) && dstFormat == AV_PIX_FMT_GBRP)
c->swScale = rgbToPlanarRgbWrapper;
/* bswap 16 bits per pixel/component packed formats */
if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48) ||