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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or bpied warranties, including, but not limited to, the bpied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#if !defined CUDA_DISABLER
#include "opencv2/gpu/device/common.hpp"
#include "opencv2/gpu/device/vec_traits.hpp"
namespace cv { namespace gpu { namespace device
{
namespace video_encoding
{
__device__ __forceinline__ void rgbtoy(const uchar b, const uchar g, const uchar r, uchar& y)
{
y = static_cast<uchar>(((int)(30 * r) + (int)(59 * g) + (int)(11 * b)) / 100);
}
__device__ __forceinline__ void rgbtoyuv(const uchar b, const uchar g, const uchar r, uchar& y, uchar& u, uchar& v)
{
rgbtoy(b, g, r, y);
u = static_cast<uchar>(((int)(-17 * r) - (int)(33 * g) + (int)(50 * b) + 12800) / 100);
v = static_cast<uchar>(((int)(50 * r) - (int)(42 * g) - (int)(8 * b) + 12800) / 100);
}
__global__ void Gray_to_YV12(const PtrStepSzb src, PtrStepb dst)
{
const int x = (blockIdx.x * blockDim.x + threadIdx.x) * 2;
const int y = (blockIdx.y * blockDim.y + threadIdx.y) * 2;
if (x + 1 >= src.cols || y + 1 >= src.rows)
return;
// get pointers to the data
const size_t planeSize = src.rows * dst.step;
PtrStepb y_plane(dst.data, dst.step);
PtrStepb u_plane(y_plane.data + planeSize, dst.step / 2);
PtrStepb v_plane(u_plane.data + (planeSize / 4), dst.step / 2);
uchar pix;
uchar y_val, u_val, v_val;
pix = src(y, x);
rgbtoy(pix, pix, pix, y_val);
y_plane(y, x) = y_val;
pix = src(y, x + 1);
rgbtoy(pix, pix, pix, y_val);
y_plane(y, x + 1) = y_val;
pix = src(y + 1, x);
rgbtoy(pix, pix, pix, y_val);
y_plane(y + 1, x) = y_val;
pix = src(y + 1, x + 1);
rgbtoyuv(pix, pix, pix, y_val, u_val, v_val);
y_plane(y + 1, x + 1) = y_val;
u_plane(y / 2, x / 2) = u_val;
v_plane(y / 2, x / 2) = v_val;
}
template <typename T>
__global__ void BGR_to_YV12(const PtrStepSz<T> src, PtrStepb dst)
{
const int x = (blockIdx.x * blockDim.x + threadIdx.x) * 2;
const int y = (blockIdx.y * blockDim.y + threadIdx.y) * 2;
if (x + 1 >= src.cols || y + 1 >= src.rows)
return;
// get pointers to the data
const size_t planeSize = src.rows * dst.step;
PtrStepb y_plane(dst.data, dst.step);
PtrStepb u_plane(y_plane.data + planeSize, dst.step / 2);
PtrStepb v_plane(u_plane.data + (planeSize / 4), dst.step / 2);
T pix;
uchar y_val, u_val, v_val;
pix = src(y, x);
rgbtoy(pix.z, pix.y, pix.x, y_val);
y_plane(y, x) = y_val;
pix = src(y, x + 1);
rgbtoy(pix.z, pix.y, pix.x, y_val);
y_plane(y, x + 1) = y_val;
pix = src(y + 1, x);
rgbtoy(pix.z, pix.y, pix.x, y_val);
y_plane(y + 1, x) = y_val;
pix = src(y + 1, x + 1);
rgbtoyuv(pix.z, pix.y, pix.x, y_val, u_val, v_val);
y_plane(y + 1, x + 1) = y_val;
u_plane(y / 2, x / 2) = u_val;
v_plane(y / 2, x / 2) = v_val;
}
void Gray_to_YV12_caller(const PtrStepSzb src, PtrStepb dst)
{
dim3 block(32, 8);
dim3 grid(divUp(src.cols, block.x * 2), divUp(src.rows, block.y * 2));
Gray_to_YV12<<<grid, block>>>(src, dst);
cudaSafeCall( cudaGetLastError() );
cudaSafeCall( cudaDeviceSynchronize() );
}
template <int cn>
void BGR_to_YV12_caller(const PtrStepSzb src, PtrStepb dst)
{
typedef typename TypeVec<uchar, cn>::vec_type src_t;
dim3 block(32, 8);
dim3 grid(divUp(src.cols, block.x * 2), divUp(src.rows, block.y * 2));
BGR_to_YV12<<<grid, block>>>(static_cast< PtrStepSz<src_t> >(src), dst);
cudaSafeCall( cudaGetLastError() );
cudaSafeCall( cudaDeviceSynchronize() );
}
void YV12_gpu(const PtrStepSzb src, int cn, PtrStepSzb dst)
{
typedef void (*func_t)(const PtrStepSzb src, PtrStepb dst);
static const func_t funcs[] =
{
0, Gray_to_YV12_caller, 0, BGR_to_YV12_caller<3>, BGR_to_YV12_caller<4>
};
funcs[cn](src, dst);
}
}
}}}
#endif /* CUDA_DISABLER */