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sws: init input_rgb2yuv_table depending on yuv colorspace 

For the default table we keep using the exact previous
coefficients, this way individual functions can be updated seperately
without breaking fate

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-04-14 23:52:31 +02:00
parent 3662e49dde
commit 9aafb95ae2
2 changed files with 53 additions and 10 deletions
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9
libswscale/swscale.c
View File

@ -385,15 +385,6 @@ static int swScale(SwsContext *c, const uint8_t *src[],
if (!usePal(c->srcFormat)) {
pal = c->input_rgb2yuv_table;
pal[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
pal[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
pal[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
pal[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
pal[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
pal[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
pal[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
pal[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
pal[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
}
if (isPacked(c->srcFormat)) {

54
libswscale/utils.c
View File

@ -799,6 +799,55 @@ static void getSubSampleFactors(int *h, int *v, enum AVPixelFormat format)
*v = desc->log2_chroma_h;
}
static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
{
int64_t W,V,Z;
int64_t vr = table[0];
int64_t ub = table[1];
int64_t ug = -table[2];
int64_t vg = -table[3];
int64_t ONE = 65536;
int64_t cy = ONE;
dstRange = 0; //FIXME range = 1 is handled elsewhere
if (!dstRange) {
cy = cy * 255 / 219;
} else {
vr = vr * 224 / 255;
ub = ub * 224 / 255;
ug = ug * 224 / 255;
vg = vg * 224 / 255;
}
W = ONE*ug/ub;
V = ONE*vg/vr;
Z = ONE-W-V;
c->input_rgb2yuv_table[RY_IDX] = -(1 << RGB2YUV_SHIFT)*ONE*V/(Z*cy);
c->input_rgb2yuv_table[GY_IDX] = (1 << RGB2YUV_SHIFT)*ONE*ONE/(Z*cy);
c->input_rgb2yuv_table[BY_IDX] = -(1 << RGB2YUV_SHIFT)*ONE*W/(Z*cy);
c->input_rgb2yuv_table[RU_IDX] = (1 << RGB2YUV_SHIFT)*ONE*V/(Z*ub);
c->input_rgb2yuv_table[GU_IDX] = -(1 << RGB2YUV_SHIFT)*ONE*ONE/(Z*ub);
c->input_rgb2yuv_table[BU_IDX] = (1 << RGB2YUV_SHIFT)*(ONE + ONE*W/Z)/ub;
c->input_rgb2yuv_table[RV_IDX] = (1 << RGB2YUV_SHIFT)*(ONE + ONE*V/Z)/vr;
c->input_rgb2yuv_table[GV_IDX] = -(1 << RGB2YUV_SHIFT)*ONE*ONE/(Z*vr);
c->input_rgb2yuv_table[BV_IDX] = (1 << RGB2YUV_SHIFT)*ONE*W/(Z*vr);
if(/*!dstRange && */table == ff_yuv2rgb_coeffs[SWS_CS_DEFAULT]) {
c->input_rgb2yuv_table[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
}
}
int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
int srcRange, const int table[4], int dstRange,
int brightness, int contrast, int saturation)
@ -819,7 +868,7 @@ int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
c->srcRange = srcRange;
c->dstRange = dstRange;
if (isYUV(c->dstFormat) || isGray(c->dstFormat))
if ((isYUV(c->dstFormat) || isGray(c->dstFormat)) && (isYUV(c->srcFormat) || isGray(c->srcFormat)))
return -1;
c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
@ -832,6 +881,9 @@ int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
if (HAVE_ALTIVEC && av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)
ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness,
contrast, saturation);
fill_rgb2yuv_table(c, table, dstRange);
return 0;
}