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cv::cvtColor (RGB5x52RGB)

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This commit is contained in:
Ilya Lavrenov
2014-10-06 11:55:12 -07:00
parent 28ee84b731
commit b9f57bda05
1 changed files with 78 additions and 4 deletions
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82
modules/imgproc/src/color.cpp
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@@ -724,13 +724,51 @@ struct RGB5x52RGB
typedef uchar channel_type;
RGB5x52RGB(int _dstcn, int _blueIdx, int _greenBits)
: dstcn(_dstcn), blueIdx(_blueIdx), greenBits(_greenBits) {}
: dstcn(_dstcn), blueIdx(_blueIdx), greenBits(_greenBits)
{
#if CV_NEON
v_n3 = vdupq_n_u16(~3);
v_n7 = vdupq_n_u16(~7);
v_255 = vdupq_n_u8(255);
v_0 = vdupq_n_u8(0);
v_mask = vdupq_n_u16(0x8000);
#endif
}
void operator()(const uchar* src, uchar* dst, int n) const
{
int dcn = dstcn, bidx = blueIdx;
int dcn = dstcn, bidx = blueIdx, i = 0;
if( greenBits == 6 )
for( int i = 0; i < n; i++, dst += dcn )
{
#if CV_NEON
for ( ; i <= n - 16; i += 16, dst += dcn * 16)
{
uint16x8_t v_src0 = vld1q_u16((const ushort *)src + i), v_src1 = vld1q_u16((const ushort *)src + i + 8);
uint8x16_t v_b = vcombine_u8(vmovn_u16(vshlq_n_u16(v_src0, 3)), vmovn_u16(vshlq_n_u16(v_src1, 3)));
uint8x16_t v_g = vcombine_u8(vmovn_u16(vandq_u16(vshrq_n_u16(v_src0, 3), v_n3)),
vmovn_u16(vandq_u16(vshrq_n_u16(v_src1, 3), v_n3)));
uint8x16_t v_r = vcombine_u8(vmovn_u16(vandq_u16(vshrq_n_u16(v_src0, 8), v_n7)),
vmovn_u16(vandq_u16(vshrq_n_u16(v_src1, 8), v_n7)));
if (dcn == 3)
{
uint8x16x3_t v_dst;
v_dst.val[bidx] = v_b;
v_dst.val[1] = v_g;
v_dst.val[bidx^2] = v_r;
vst3q_u8(dst, v_dst);
}
else
{
uint8x16x4_t v_dst;
v_dst.val[bidx] = v_b;
v_dst.val[1] = v_g;
v_dst.val[bidx^2] = v_r;
v_dst.val[3] = v_255;
vst4q_u8(dst, v_dst);
}
}
#endif
for( ; i < n; i++, dst += dcn )
{
unsigned t = ((const ushort*)src)[i];
dst[bidx] = (uchar)(t << 3);
@@ -739,8 +777,39 @@ struct RGB5x52RGB
if( dcn == 4 )
dst[3] = 255;
}
}
else
for( int i = 0; i < n; i++, dst += dcn )
{
#if CV_NEON
for ( ; i <= n - 16; i += 16, dst += dcn * 16)
{
uint16x8_t v_src0 = vld1q_u16((const ushort *)src + i), v_src1 = vld1q_u16((const ushort *)src + i + 8);
uint8x16_t v_b = vcombine_u8(vmovn_u16(vshlq_n_u16(v_src0, 3)), vmovn_u16(vshlq_n_u16(v_src1, 3)));
uint8x16_t v_g = vcombine_u8(vmovn_u16(vandq_u16(vshrq_n_u16(v_src0, 2), v_n7)),
vmovn_u16(vandq_u16(vshrq_n_u16(v_src1, 2), v_n7)));
uint8x16_t v_r = vcombine_u8(vmovn_u16(vandq_u16(vshrq_n_u16(v_src0, 7), v_n7)),
vmovn_u16(vandq_u16(vshrq_n_u16(v_src1, 7), v_n7)));
if (dcn == 3)
{
uint8x16x3_t v_dst;
v_dst.val[bidx] = v_b;
v_dst.val[1] = v_g;
v_dst.val[bidx^2] = v_r;
vst3q_u8(dst, v_dst);
}
else
{
uint8x16x4_t v_dst;
v_dst.val[bidx] = v_b;
v_dst.val[1] = v_g;
v_dst.val[bidx^2] = v_r;
v_dst.val[3] = vbslq_u8(vcombine_u8(vqmovn_u16(vandq_u16(v_src0, v_mask)),
vqmovn_u16(vandq_u16(v_src1, v_mask))), v_255, v_0);
vst4q_u8(dst, v_dst);
}
}
#endif
for( ; i < n; i++, dst += dcn )
{
unsigned t = ((const ushort*)src)[i];
dst[bidx] = (uchar)(t << 3);
@@ -749,9 +818,14 @@ struct RGB5x52RGB
if( dcn == 4 )
dst[3] = t & 0x8000 ? 255 : 0;
}
}
}
int dstcn, blueIdx, greenBits;
#if CV_NEON
uint16x8_t v_n3, v_n7, v_mask;
uint8x16_t v_255, v_0;
#endif
};