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cvtColor RGB 2 YCrCb

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This commit is contained in:
Ilya Lavrenov 2015-01-12 10:59:29 +03:00
parent 940f1e7914
commit b99396ab12
1 changed files with 149 additions and 1 deletions
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150
modules/imgproc/src/color.cpp
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@ -273,6 +273,32 @@ static IppStatus sts = ippInit();
layer0_chunk5 = _mm_unpackhi_ps(layer2_chunk2, layer2_chunk5); \
}
#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); \ \
\
__m128 layer2_chunk0 = _mm_shuffle_ps(v_r0, v_r1, mask_lo); \
__m128 layer2_chunk3 = _mm_shuffle_ps(v_r0, v_r1, mask_hi); \
__m128 layer2_chunk1 = _mm_shuffle_ps(v_g0, v_g1, mask_lo); \
__m128 layer2_chunk4 = _mm_shuffle_ps(v_g0, v_g1, mask_hi); \
__m128 layer2_chunk2 = _mm_shuffle_ps(v_b0, v_b1, mask_lo); \
__m128 layer2_chunk5 = _mm_shuffle_ps(v_b0, v_b1, mask_hi); \
\
__m128 layer1_chunk0 = _mm_shuffle_ps(layer2_chunk0, layer2_chunk1, mask_lo); \
__m128 layer1_chunk3 = _mm_shuffle_ps(layer2_chunk0, layer2_chunk1, mask_hi); \
__m128 layer1_chunk1 = _mm_shuffle_ps(layer2_chunk2, layer2_chunk3, mask_lo); \
__m128 layer1_chunk4 = _mm_shuffle_ps(layer2_chunk2, layer2_chunk3, mask_hi); \
__m128 layer1_chunk2 = _mm_shuffle_ps(layer2_chunk4, layer2_chunk5, mask_lo); \
__m128 layer1_chunk5 = _mm_shuffle_ps(layer2_chunk4, layer2_chunk5, mask_hi); \
\
v_r0 = _mm_shuffle_ps(layer1_chunk0, layer1_chunk1, mask_lo); \
v_g1 = _mm_shuffle_ps(layer1_chunk0, layer1_chunk1, mask_hi); \
v_r1 = _mm_shuffle_ps(layer1_chunk2, layer1_chunk3, mask_lo); \
v_b0 = _mm_shuffle_ps(layer1_chunk2, layer1_chunk3, mask_hi); \
v_g0 = _mm_shuffle_ps(layer1_chunk4, layer1_chunk5, mask_lo); \
v_b1 = _mm_shuffle_ps(layer1_chunk4, layer1_chunk5, mask_hi); \
}
#endif
namespace cv
@ -2059,7 +2085,7 @@ struct RGB2YCrCb_i<uchar>
int delta = ColorChannel<uchar>::half()*(1 << yuv_shift);
n *= 3;
if (scn == 3 && false)
if (scn == 3)
{
for ( ; i <= n - 96; i += 96, src += scn * 32)
{
@ -2130,6 +2156,128 @@ struct RGB2YCrCb_i<uchar>
__m128i v_zero;
};
#if CV_SSE4_1
template <>
struct RGB2YCrCb_i<ushort>
{
typedef ushort channel_type;
RGB2YCrCb_i(int _srccn, int _blueIdx, const int* _coeffs)
: srccn(_srccn), blueIdx(_blueIdx)
{
static const int coeffs0[] = {R2Y, G2Y, B2Y, 11682, 9241};
memcpy(coeffs, _coeffs ? _coeffs : coeffs0, 5*sizeof(coeffs[0]));
if (blueIdx==0)
std::swap(coeffs[0], coeffs[2]);
v_c0 = _mm_set1_epi32(coeffs[0]);
v_c1 = _mm_set1_epi32(coeffs[1]);
v_c2 = _mm_set1_epi32(coeffs[2]);
v_c3 = _mm_set1_epi32(coeffs[3]);
v_c4 = _mm_set1_epi32(coeffs[4]);
v_delta2 = _mm_set1_epi32(1 << (yuv_shift - 1));
v_delta = _mm_set1_epi32(ColorChannel<ushort>::half()*(1 << yuv_shift));
v_delta = _mm_add_epi32(v_delta, v_delta2);
v_zero = _mm_setzero_si128();
}
// 16u x 8
void process(__m128i v_r, __m128i v_g, __m128i v_b,
__m128i & v_y, __m128i & v_cr, __m128i & v_cb) const
{
__m128i v_r_p = _mm_unpacklo_epi16(v_r, v_zero);
__m128i v_g_p = _mm_unpacklo_epi16(v_g, v_zero);
__m128i v_b_p = _mm_unpacklo_epi16(v_b, v_zero);
__m128i v_y0 = _mm_add_epi32(_mm_mullo_epi32(v_r_p, v_c0),
_mm_add_epi32(_mm_mullo_epi32(v_g_p, v_c1),
_mm_mullo_epi32(v_b_p, v_c2)));
v_y0 = _mm_srli_epi32(_mm_add_epi32(v_delta2, v_y0), yuv_shift);
__m128i v_cr0 = _mm_mullo_epi32(_mm_sub_epi32(blueIdx == 2 ? v_r_p : v_b_p, v_y0), v_c3);
__m128i v_cb0 = _mm_mullo_epi32(_mm_sub_epi32(blueIdx == 0 ? v_r_p : v_b_p, v_y0), v_c4);
v_cr0 = _mm_srai_epi32(_mm_add_epi32(v_delta, v_cr0), yuv_shift);
v_cb0 = _mm_srai_epi32(_mm_add_epi32(v_delta, v_cb0), yuv_shift);
v_r_p = _mm_unpackhi_epi16(v_r, v_zero);
v_g_p = _mm_unpackhi_epi16(v_g, v_zero);
v_b_p = _mm_unpackhi_epi16(v_b, v_zero);
__m128i v_y1 = _mm_add_epi32(_mm_mullo_epi32(v_r_p, v_c0),
_mm_add_epi32(_mm_mullo_epi32(v_g_p, v_c1),
_mm_mullo_epi32(v_b_p, v_c2)));
v_y1 = _mm_srli_epi32(_mm_add_epi32(v_delta2, v_y1), yuv_shift);
__m128i v_cr1 = _mm_mullo_epi32(_mm_sub_epi32(blueIdx == 2 ? v_r_p : v_b_p, v_y1), v_c3);
__m128i v_cb1 = _mm_mullo_epi32(_mm_sub_epi32(blueIdx == 0 ? v_r_p : v_b_p, v_y1), v_c4);
v_cr1 = _mm_srai_epi32(_mm_add_epi32(v_delta, v_cr1), yuv_shift);
v_cb1 = _mm_srai_epi32(_mm_add_epi32(v_delta, v_cb1), yuv_shift);
v_y = _mm_packus_epi32(v_y0, v_y1);
v_cr = _mm_packus_epi32(v_cr0, v_cr1);
v_cb = _mm_packus_epi32(v_cb0, v_cb1);
}
void operator()(const ushort * src, ushort * dst, int n) const
{
int scn = srccn, bidx = blueIdx, i = 0;
int C0 = coeffs[0], C1 = coeffs[1], C2 = coeffs[2], C3 = coeffs[3], C4 = coeffs[4];
int delta = ColorChannel<ushort>::half()*(1 << yuv_shift);
n *= 3;
if (scn == 3)
{
for ( ; i <= n - 48; i += 48, src += scn * 16)
{
__m128i v_r0 = _mm_loadu_si128((__m128i const *)(src));
__m128i v_r1 = _mm_loadu_si128((__m128i const *)(src + 8));
__m128i v_g0 = _mm_loadu_si128((__m128i const *)(src + 16));
__m128i v_g1 = _mm_loadu_si128((__m128i const *)(src + 24));
__m128i v_b0 = _mm_loadu_si128((__m128i const *)(src + 32));
__m128i v_b1 = _mm_loadu_si128((__m128i const *)(src + 40));
_MM_DEINTERLIV_EPI16(v_r0, v_r1, v_g0, v_g1, v_b0, v_b1)
__m128i v_y0 = v_zero, v_cr0 = v_zero, v_cb0 = v_zero;
process(v_r0, v_g0, v_b0,
v_y0, v_cr0, v_cb0);
__m128i v_y1 = v_zero, v_cr1 = v_zero, v_cb1 = v_zero;
process(v_r1, v_g1, v_b1,
v_y1, v_cr1, v_cb1);
_MM_INTERLIV_EPI16(v_y0, v_y1, v_cr0, v_cr1, v_cb0, v_cb1)
_mm_storeu_si128((__m128i *)(dst + i), v_y0);
_mm_storeu_si128((__m128i *)(dst + i + 8), v_y1);
_mm_storeu_si128((__m128i *)(dst + i + 16), v_cr0);
_mm_storeu_si128((__m128i *)(dst + i + 24), v_cr1);
_mm_storeu_si128((__m128i *)(dst + i + 32), v_cb0);
_mm_storeu_si128((__m128i *)(dst + i + 40), v_cb1);
}
}
for ( ; i < n; i += 3, src += scn)
{
int Y = CV_DESCALE(src[0]*C0 + src[1]*C1 + src[2]*C2, yuv_shift);
int Cr = CV_DESCALE((src[bidx^2] - Y)*C3 + delta, yuv_shift);
int Cb = CV_DESCALE((src[bidx] - Y)*C4 + delta, yuv_shift);
dst[i] = saturate_cast<ushort>(Y);
dst[i+1] = saturate_cast<ushort>(Cr);
dst[i+2] = saturate_cast<ushort>(Cb);
}
}
int srccn, blueIdx, coeffs[5];
__m128i v_c0, v_c1, v_c2;
__m128i v_c3, v_c4, v_delta, v_delta2;
__m128i v_zero;
};
#endif // CV_SSE4_1
#endif