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cvtColor RGB 2 YCrCb 32f

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This commit is contained in:
Ilya Lavrenov 2015-01-12 10:59:29 +03:00
parent b99396ab12
commit 97fad1cb53
1 changed files with 87 additions and 1 deletions
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88
modules/imgproc/src/color.cpp
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@ -275,7 +275,7 @@ static IppStatus sts = ippInit();
#define _MM_INTERLIV_PS(v_r0, v_r1, v_g0, v_g1, v_b0, v_b1) \
{ \
const int mask_lo = _MM_SHUFFLE(2, 0, 2, 0), mask_hi = _MM_SHUFFLE(3, 1, 3, 1); \ \
const int mask_lo = _MM_SHUFFLE(2, 0, 2, 0), mask_hi = _MM_SHUFFLE(3, 1, 3, 1); \
\
__m128 layer2_chunk0 = _mm_shuffle_ps(v_r0, v_r1, mask_lo); \
__m128 layer2_chunk3 = _mm_shuffle_ps(v_r0, v_r1, mask_hi); \
@ -1765,6 +1765,92 @@ struct RGB2YCrCb_f<float>
float32x4_t v_c0, v_c1, v_c2, v_c3, v_c4, v_delta;
};
#elif CV_SSE2
template <>
struct RGB2YCrCb_f<float>
{
typedef float channel_type;
RGB2YCrCb_f(int _srccn, int _blueIdx, const float* _coeffs) :
srccn(_srccn), blueIdx(_blueIdx)
{
static const float coeffs0[] = {0.299f, 0.587f, 0.114f, 0.713f, 0.564f};
memcpy(coeffs, _coeffs ? _coeffs : coeffs0, 5*sizeof(coeffs[0]));
if (blueIdx==0)
std::swap(coeffs[0], coeffs[2]);
v_c0 = _mm_set1_ps(coeffs[0]);
v_c1 = _mm_set1_ps(coeffs[1]);
v_c2 = _mm_set1_ps(coeffs[2]);
v_c3 = _mm_set1_ps(coeffs[3]);
v_c4 = _mm_set1_ps(coeffs[4]);
v_delta = _mm_set1_ps(ColorChannel<float>::half());
}
void process(__m128 v_r, __m128 v_g, __m128 v_b,
__m128 & v_y, __m128 & v_cr, __m128 & v_cb) const
{
v_y = _mm_mul_ps(v_r, v_c0);
v_y = _mm_add_ps(v_y, _mm_mul_ps(v_g, v_c1));
v_y = _mm_add_ps(v_y, _mm_mul_ps(v_b, v_c2));
v_cr = _mm_add_ps(_mm_mul_ps(_mm_sub_ps(blueIdx == 0 ? v_b : v_r, v_y), v_c3), v_delta);
v_cb = _mm_add_ps(_mm_mul_ps(_mm_sub_ps(blueIdx == 2 ? v_b : v_r, v_y), v_c4), v_delta);
}
void operator()(const float * src, float * dst, int n) const
{
int scn = srccn, bidx = blueIdx, i = 0;
const float delta = ColorChannel<float>::half();
float C0 = coeffs[0], C1 = coeffs[1], C2 = coeffs[2], C3 = coeffs[3], C4 = coeffs[4];
n *= 3;
if (scn == 3)
{
for ( ; i <= n - 24; i += 24, src += 24)
{
__m128 v_r0 = _mm_loadu_ps(src);
__m128 v_r1 = _mm_loadu_ps(src + 4);
__m128 v_g0 = _mm_loadu_ps(src + 8);
__m128 v_g1 = _mm_loadu_ps(src + 12);
__m128 v_b0 = _mm_loadu_ps(src + 16);
__m128 v_b1 = _mm_loadu_ps(src + 20);
_MM_DEINTERLIV_PS(v_r0, v_r1, v_g0, v_g1, v_b0, v_b1)
__m128 v_y0, v_cr0, v_cb0;
process(v_r0, v_g0, v_b0,
v_y0, v_cr0, v_cb0);
__m128 v_y1, v_cr1, v_cb1;
process(v_r1, v_g1, v_b1,
v_y1, v_cr1, v_cb1);
_MM_INTERLIV_PS(v_y0, v_y1, v_cr0, v_cr1, v_cb0, v_cb1)
_mm_storeu_ps(dst + i, v_y0);
_mm_storeu_ps(dst + i + 4, v_y1);
_mm_storeu_ps(dst + i + 8, v_cr0);
_mm_storeu_ps(dst + i + 12, v_cr1);
_mm_storeu_ps(dst + i + 16, v_cb0);
_mm_storeu_ps(dst + i + 20, v_cb1);
}
}
for ( ; i < n; i += 3, src += scn)
{
float Y = src[0]*C0 + src[1]*C1 + src[2]*C2;
float Cr = (src[bidx^2] - Y)*C3 + delta;
float Cb = (src[bidx] - Y)*C4 + delta;
dst[i] = Y; dst[i+1] = Cr; dst[i+2] = Cb;
}
}
int srccn, blueIdx;
float coeffs[5];
__m128 v_c0, v_c1, v_c2, v_c3, v_c4, v_delta;
};
#endif
template<typename _Tp> struct RGB2YCrCb_i