/*M///////////////////////////////////////////////////////////////////////////////////////
//
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//
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//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2010-2012, Institute Of Software Chinese Academy Of Science, all rights reserved.
// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// @Authors
// Jia Haipeng, jiahaipeng95@gmail.com
//
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
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// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
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//M*/
#ifdef DOUBLE_SUPPORT
#ifdef cl_amd_fp64
#pragma OPENCL EXTENSION cl_amd_fp64:enable
#elif defined cl_khr_fp64
#pragma OPENCL EXTENSION cl_khr_fp64:enable
#endif
#endif
#ifdef INTEL_DEVICE
#pragma OPENCL FP_CONTRACT ON
#pragma OPENCL FP_FAST_FMAF ON
#pragma OPENCL FP_FAST_FMA ON
#endif
static
__constant
float c_YUV2RGBCoeffs_420[5] =
{
1.163999557f,
2.017999649f,
-0.390999794f,
-0.812999725f,
1.5959997177f
};
static const __constant float CV_8U_MAX = 255.0f;
static const __constant float CV_8U_HALF = 128.0f;
static const __constant float BT601_BLACK_RANGE = 16.0f;
static const __constant float CV_8U_SCALE = 1.0f / 255.0f;
static const __constant float d1 = BT601_BLACK_RANGE / CV_8U_MAX;
static const __constant float d2 = CV_8U_HALF / CV_8U_MAX;
#define NCHANNELS 3
__kernel
void YUV2BGR_NV12_8u(
read_only image2d_t imgY,
read_only image2d_t imgUV,
__global unsigned char* pBGR,
int bgrStep,
int cols,
int rows)
{
int x = get_global_id(0);
int y = get_global_id(1);
if (x + 1 < cols)
{
if (y + 1 < rows)
{
__global uchar* pDstRow1 = pBGR + mad24(y, bgrStep, mad24(x, NCHANNELS, 0));
__global uchar* pDstRow2 = pDstRow1 + bgrStep;
float4 Y1 = read_imagef(imgY, (int2)(x+0, y+0));
float4 Y2 = read_imagef(imgY, (int2)(x+1, y+0));
float4 Y3 = read_imagef(imgY, (int2)(x+0, y+1));
float4 Y4 = read_imagef(imgY, (int2)(x+1, y+1));
float4 UV = read_imagef(imgUV, (int2)(x/2, y/2)) - d2;
__constant float* coeffs = c_YUV2RGBCoeffs_420;
Y1 = max(0.f, Y1 - d1) * coeffs[0];
Y2 = max(0.f, Y2 - d1) * coeffs[0];
Y3 = max(0.f, Y3 - d1) * coeffs[0];
Y4 = max(0.f, Y4 - d1) * coeffs[0];
float ruv = fma(coeffs[4], UV.y, 0.0f);
float guv = fma(coeffs[3], UV.y, fma(coeffs[2], UV.x, 0.0f));
float buv = fma(coeffs[1], UV.x, 0.0f);
float R1 = (Y1.x + ruv) * CV_8U_MAX;
float G1 = (Y1.x + guv) * CV_8U_MAX;
float B1 = (Y1.x + buv) * CV_8U_MAX;
float R2 = (Y2.x + ruv) * CV_8U_MAX;
float G2 = (Y2.x + guv) * CV_8U_MAX;
float B2 = (Y2.x + buv) * CV_8U_MAX;
float R3 = (Y3.x + ruv) * CV_8U_MAX;
float G3 = (Y3.x + guv) * CV_8U_MAX;
float B3 = (Y3.x + buv) * CV_8U_MAX;
float R4 = (Y4.x + ruv) * CV_8U_MAX;
float G4 = (Y4.x + guv) * CV_8U_MAX;
float B4 = (Y4.x + buv) * CV_8U_MAX;
pDstRow1[0*NCHANNELS + 0] = convert_uchar_sat(B1);
pDstRow1[0*NCHANNELS + 1] = convert_uchar_sat(G1);
pDstRow1[0*NCHANNELS + 2] = convert_uchar_sat(R1);
pDstRow1[1*NCHANNELS + 0] = convert_uchar_sat(B2);
pDstRow1[1*NCHANNELS + 1] = convert_uchar_sat(G2);
pDstRow1[1*NCHANNELS + 2] = convert_uchar_sat(R2);
pDstRow2[0*NCHANNELS + 0] = convert_uchar_sat(B3);
pDstRow2[0*NCHANNELS + 1] = convert_uchar_sat(G3);
pDstRow2[0*NCHANNELS + 2] = convert_uchar_sat(R3);
pDstRow2[1*NCHANNELS + 0] = convert_uchar_sat(B4);
pDstRow2[1*NCHANNELS + 1] = convert_uchar_sat(G4);
pDstRow2[1*NCHANNELS + 2] = convert_uchar_sat(R4);
}
}
}
static
__constant float c_RGB2YUVCoeffs_420[8] =
{
0.256999969f, 0.50399971f, 0.09799957f, -0.1479988098f,
-0.2909994125f, 0.438999176f, -0.3679990768f, -0.0709991455f
};
__kernel
void BGR2YUV_NV12_8u(
__global unsigned char* pBGR,
int bgrStep,
int cols,
int rows,
write_only image2d_t imgY,
write_only image2d_t imgUV)
{
int x = get_global_id(0);
int y = get_global_id(1);
if (x < cols)
{
if (y < rows)
{
__global const uchar* pSrcRow1 = pBGR + mad24(y, bgrStep, mad24(x, NCHANNELS, 0));
__global const uchar* pSrcRow2 = pSrcRow1 + bgrStep;
float4 src_pix1 = convert_float4(vload4(0, pSrcRow1 + 0*NCHANNELS)) * CV_8U_SCALE;
float4 src_pix2 = convert_float4(vload4(0, pSrcRow1 + 1*NCHANNELS)) * CV_8U_SCALE;
float4 src_pix3 = convert_float4(vload4(0, pSrcRow2 + 0*NCHANNELS)) * CV_8U_SCALE;
float4 src_pix4 = convert_float4(vload4(0, pSrcRow2 + 1*NCHANNELS)) * CV_8U_SCALE;
__constant float* coeffs = c_RGB2YUVCoeffs_420;
float Y1 = fma(coeffs[0], src_pix1.z, fma(coeffs[1], src_pix1.y, fma(coeffs[2], src_pix1.x, d1)));
float Y2 = fma(coeffs[0], src_pix2.z, fma(coeffs[1], src_pix2.y, fma(coeffs[2], src_pix2.x, d1)));
float Y3 = fma(coeffs[0], src_pix3.z, fma(coeffs[1], src_pix3.y, fma(coeffs[2], src_pix3.x, d1)));
float Y4 = fma(coeffs[0], src_pix4.z, fma(coeffs[1], src_pix4.y, fma(coeffs[2], src_pix4.x, d1)));
float4 UV;
UV.x = fma(coeffs[3], src_pix1.z, fma(coeffs[4], src_pix1.y, fma(coeffs[5], src_pix1.x, d2)));
UV.y = fma(coeffs[5], src_pix1.z, fma(coeffs[6], src_pix1.y, fma(coeffs[7], src_pix1.x, d2)));
write_imagef(imgY, (int2)(x+0, y+0), Y1);
write_imagef(imgY, (int2)(x+1, y+0), Y2);
write_imagef(imgY, (int2)(x+0, y+1), Y3);
write_imagef(imgY, (int2)(x+1, y+1), Y4);
write_imagef(imgUV, (int2)((x/2), (y/2)), UV);
}
}
}