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cv::cvtColor (RGBRGB5x5)

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This commit is contained in:
Ilya Lavrenov 2014-10-06 12:40:41 -07:00
parent b9f57bda05
commit a84c4ac197
1 changed files with 72 additions and 10 deletions
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82
modules/imgproc/src/color.cpp
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@ -834,30 +834,92 @@ struct RGB2RGB5x5
typedef uchar channel_type;
RGB2RGB5x5(int _srccn, int _blueIdx, int _greenBits)
: srccn(_srccn), blueIdx(_blueIdx), greenBits(_greenBits) {}
: srccn(_srccn), blueIdx(_blueIdx), greenBits(_greenBits)
{
#if CV_NEON
v_n3 = vdup_n_u8(~3);
v_n7 = vdup_n_u8(~7);
v_mask = vdupq_n_u16(0x8000);
v_0 = vdupq_n_u16(0);
v_full = vdupq_n_u16(0xffff);
#endif
}
void operator()(const uchar* src, uchar* dst, int n) const
{
int scn = srccn, bidx = blueIdx;
if( greenBits == 6 )
for( int i = 0; i < n; i++, src += scn )
int scn = srccn, bidx = blueIdx, i = 0;
if (greenBits == 6)
{
if (scn == 3)
{
((ushort*)dst)[i] = (ushort)((src[bidx] >> 3)|((src[1]&~3) << 3)|((src[bidx^2]&~7) << 8));
#if CV_NEON
for ( ; i <= n - 8; i += 8, src += 24 )
{
uint8x8x3_t v_src = vld3_u8(src);
uint16x8_t v_dst = vmovl_u8(vshr_n_u8(v_src.val[bidx], 3));
v_dst = vorrq_u16(v_dst, vshlq_n_u16(vmovl_u8(vand_u8(v_src.val[1], v_n3)), 3));
v_dst = vorrq_u16(v_dst, vshlq_n_u16(vmovl_u8(vand_u8(v_src.val[bidx^2], v_n7)), 8));
vst1q_u16((ushort *)dst + i, v_dst);
}
#endif
for ( ; i < n; i++, src += 3 )
((ushort*)dst)[i] = (ushort)((src[bidx] >> 3)|((src[1]&~3) << 3)|((src[bidx^2]&~7) << 8));
}
else if( scn == 3 )
for( int i = 0; i < n; i++, src += 3 )
else
{
#if CV_NEON
for ( ; i <= n - 8; i += 8, src += 32 )
{
uint8x8x4_t v_src = vld4_u8(src);
uint16x8_t v_dst = vmovl_u8(vshr_n_u8(v_src.val[bidx], 3));
v_dst = vorrq_u16(v_dst, vshlq_n_u16(vmovl_u8(vand_u8(v_src.val[1], v_n3)), 3));
v_dst = vorrq_u16(v_dst, vshlq_n_u16(vmovl_u8(vand_u8(v_src.val[bidx^2], v_n7)), 8));
vst1q_u16((ushort *)dst + i, v_dst);
}
#endif
for ( ; i < n; i++, src += 4 )
((ushort*)dst)[i] = (ushort)((src[bidx] >> 3)|((src[1]&~3) << 3)|((src[bidx^2]&~7) << 8));
}
}
else if (scn == 3)
{
#if CV_NEON
for ( ; i <= n - 8; i += 8, src += 24 )
{
uint8x8x3_t v_src = vld3_u8(src);
uint16x8_t v_dst = vmovl_u8(vshr_n_u8(v_src.val[bidx], 3));
v_dst = vorrq_u16(v_dst, vshlq_n_u16(vmovl_u8(vand_u8(v_src.val[1], v_n7)), 2));
v_dst = vorrq_u16(v_dst, vshlq_n_u16(vmovl_u8(vand_u8(v_src.val[bidx^2], v_n7)), 7));
vst1q_u16((ushort *)dst + i, v_dst);
}
#endif
for ( ; i < n; i++, src += 3 )
((ushort*)dst)[i] = (ushort)((src[bidx] >> 3)|((src[1]&~7) << 2)|((src[bidx^2]&~7) << 7));
}
}
else
for( int i = 0; i < n; i++, src += 4 )
{
#if CV_NEON
for ( ; i <= n - 8; i += 8, src += 32 )
{
uint8x8x4_t v_src = vld4_u8(src);
uint16x8_t v_dst = vmovl_u8(vshr_n_u8(v_src.val[bidx], 3));
v_dst = vorrq_u16(v_dst, vshlq_n_u16(vmovl_u8(vand_u8(v_src.val[1], v_n7)), 2));
v_dst = vorrq_u16(v_dst, vorrq_u16(vshlq_n_u16(vmovl_u8(vand_u8(v_src.val[bidx^2], v_n7)), 7),
vbslq_u16(veorq_u16(vceqq_u16(vmovl_u8(v_src.val[3]), v_0), v_full), v_mask, v_0)));
vst1q_u16((ushort *)dst + i, v_dst);
}
#endif
for ( ; i < n; i++, src += 4 )
((ushort*)dst)[i] = (ushort)((src[bidx] >> 3)|((src[1]&~7) << 2)|
((src[bidx^2]&~7) << 7)|(src[3] ? 0x8000 : 0));
}
}
}
int srccn, blueIdx, greenBits;
#if CV_NEON
uint8x8_t v_n3, v_n7;
uint16x8_t v_mask, v_0, v_full;
#endif
};
///////////////////////////////// Color to/from Grayscale ////////////////////////////////