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cvtColor YCrCb 2 RGB 32f

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This commit is contained in:
Ilya Lavrenov 2015-01-12 10:59:29 +03:00
parent 97fad1cb53
commit 1c9e886a6a
1 changed files with 97 additions and 0 deletions
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97
modules/imgproc/src/color.cpp
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@ -2475,6 +2475,103 @@ struct YCrCb2RGB_f<float>
float32x4_t v_c0, v_c1, v_c2, v_c3, v_alpha, v_delta;
};
#elif CV_SSE2
template <>
struct YCrCb2RGB_f<float>
{
typedef float channel_type;
YCrCb2RGB_f(int _dstcn, int _blueIdx, const float* _coeffs)
: dstcn(_dstcn), blueIdx(_blueIdx)
{
static const float coeffs0[] = {1.403f, -0.714f, -0.344f, 1.773f};
memcpy(coeffs, _coeffs ? _coeffs : coeffs0, 4*sizeof(coeffs[0]));
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_delta = _mm_set1_ps(ColorChannel<float>::half());
v_alpha = _mm_set1_ps(ColorChannel<float>::max());
}
void process(__m128 v_y, __m128 v_cr, __m128 v_cb,
__m128 & v_r, __m128 & v_g, __m128 & v_b) const
{
v_cb = _mm_sub_ps(v_cb, v_delta);
v_cr = _mm_sub_ps(v_cr, v_delta);
v_b = _mm_mul_ps(v_cb, v_c3);
v_g = _mm_add_ps(_mm_mul_ps(v_cb, v_c2), _mm_mul_ps(v_cr, v_c1));
v_r = _mm_mul_ps(v_cr, v_c0);
v_b = _mm_add_ps(v_b, v_y);
v_g = _mm_add_ps(v_g, v_y);
v_r = _mm_add_ps(v_r, v_y);
if (blueIdx == 0)
std::swap(v_b, v_r);
}
void operator()(const float* src, float* dst, int n) const
{
int dcn = dstcn, bidx = blueIdx, i = 0;
const float delta = ColorChannel<float>::half(), alpha = ColorChannel<float>::max();
float C0 = coeffs[0], C1 = coeffs[1], C2 = coeffs[2], C3 = coeffs[3];
n *= 3;
if (dcn == 3)
{
for ( ; i <= n - 24; i += 24, dst += 24)
{
__m128 v_y0 = _mm_loadu_ps(src + i);
__m128 v_y1 = _mm_loadu_ps(src + i + 4);
__m128 v_cr0 = _mm_loadu_ps(src + i + 8);
__m128 v_cr1 = _mm_loadu_ps(src + i + 12);
__m128 v_cb0 = _mm_loadu_ps(src + i + 16);
__m128 v_cb1 = _mm_loadu_ps(src + i + 20);
_MM_DEINTERLIV_PS(v_y0, v_y1, v_cr0, v_cr1, v_cb0, v_cb1)
__m128 v_r0, v_g0, v_b0;
process(v_y0, v_cr0, v_cb0,
v_r0, v_g0, v_b0);
__m128 v_r1, v_g1, v_b1;
process(v_y1, v_cr1, v_cb1,
v_r1, v_g1, v_b1);
_MM_INTERLIV_PS(v_r0, v_r1, v_g0, v_g1, v_b0, v_b1)
_mm_storeu_ps(dst, v_r0);
_mm_storeu_ps(dst + 4, v_r1);
_mm_storeu_ps(dst + 8, v_g0);
_mm_storeu_ps(dst + 12, v_g1);
_mm_storeu_ps(dst + 16, v_b0);
_mm_storeu_ps(dst + 20, v_b1);
}
}
for ( ; i < n; i += 3, dst += dcn)
{
float Y = src[i], Cr = src[i+1], Cb = src[i+2];
float b = Y + (Cb - delta)*C3;
float g = Y + (Cb - delta)*C2 + (Cr - delta)*C1;
float r = Y + (Cr - delta)*C0;
dst[bidx] = b; dst[1] = g; dst[bidx^2] = r;
if( dcn == 4 )
dst[3] = alpha;
}
}
int dstcn, blueIdx;
float coeffs[4];
__m128 v_c0, v_c1, v_c2, v_c3, v_alpha, v_delta;
};
#endif
template<typename _Tp> struct YCrCb2RGB_i