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swscale: add nv12/nv21->yuv420 converter

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-11-19 14:17:26 +01:00
parent 722fb81dc5
commit ef627bf9ec
4 changed files with 52 additions and 0 deletions
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3
libswscale/rgb2rgb.c
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@ -83,6 +83,9 @@ void (*planar2x)(const uint8_t *src, uint8_t *dst, int width, int height,
void (*interleaveBytes)(const uint8_t *src1, const uint8_t *src2, uint8_t *dst,
int width, int height, int src1Stride,
int src2Stride, int dstStride);
void (*deinterleaveBytes)(const uint8_t *src, uint8_t *dst1, uint8_t *dst2,
int width, int height, int srcStride,
int dst1Stride, int dst2Stride);
void (*vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
uint8_t *dst1, uint8_t *dst2,
int width, int height,

4
libswscale/rgb2rgb.h
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@ -135,6 +135,10 @@ extern void (*interleaveBytes)(const uint8_t *src1, const uint8_t *src2, uint8_t
int width, int height, int src1Stride,
int src2Stride, int dstStride);
extern void (*deinterleaveBytes)(const uint8_t *src, uint8_t *dst1, uint8_t *dst2,
int width, int height, int srcStride,
int dst1Stride, int dst2Stride);
extern void (*vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
uint8_t *dst1, uint8_t *dst2,
int width, int height,

19
libswscale/rgb2rgb_template.c
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@ -693,6 +693,24 @@ static void interleaveBytes_c(const uint8_t *src1, const uint8_t *src2,
}
}
static void deinterleaveBytes_c(const uint8_t *src, uint8_t *dst1, uint8_t *dst2,
int width, int height, int srcStride,
int dst1Stride, int dst2Stride)
{
int h;
for (h = 0; h < height; h++) {
int w;
for (w = 0; w < width; w++) {
dst1[w] = src[2 * w + 0];
dst2[w] = src[2 * w + 1];
}
src += srcStride;
dst1 += dst1Stride;
dst2 += dst2Stride;
}
}
static inline void vu9_to_vu12_c(const uint8_t *src1, const uint8_t *src2,
uint8_t *dst1, uint8_t *dst2,
int width, int height,
@ -922,6 +940,7 @@ static av_cold void rgb2rgb_init_c(void)
planar2x = planar2x_c;
ff_rgb24toyv12 = ff_rgb24toyv12_c;
interleaveBytes = interleaveBytes_c;
deinterleaveBytes = deinterleaveBytes_c;
vu9_to_vu12 = vu9_to_vu12_c;
yvu9_to_yuy2 = yvu9_to_yuy2_c;

26
libswscale/swscale_unscaled.c
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@ -176,6 +176,27 @@ static int planarToNv12Wrapper(SwsContext *c, const uint8_t *src[],
return srcSliceH;
}
static int nv12ToPlanarWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY,
int srcSliceH, uint8_t *dstParam[],
int dstStride[])
{
uint8_t *dst1 = dstParam[1] + dstStride[1] * srcSliceY / 2;
uint8_t *dst2 = dstParam[2] + dstStride[2] * srcSliceY / 2;
copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
dstParam[0], dstStride[0]);
if (c->srcFormat == AV_PIX_FMT_NV12)
deinterleaveBytes(src[1], dst1, dst2,c->srcW / 2, srcSliceH / 2,
srcStride[1], dstStride[1], dstStride[2]);
else
deinterleaveBytes(src[1], dst2, dst1, c->srcW / 2, srcSliceH / 2,
srcStride[1], dstStride[2], dstStride[1]);
return srcSliceH;
}
static int planarToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
@ -1212,6 +1233,11 @@ void ff_get_unscaled_swscale(SwsContext *c)
(dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {
c->swscale = planarToNv12Wrapper;
}
/* nv12_to_yv12 */
if (dstFormat == AV_PIX_FMT_YUV420P &&
(srcFormat == AV_PIX_FMT_NV12 || srcFormat == AV_PIX_FMT_NV21)) {
c->swscale = nv12ToPlanarWrapper;
}
/* yuv2bgr */
if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||
srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&