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#define __CL_ENABLE_EXCEPTIONS
#define CL_USE_DEPRECATED_OPENCL_1_1_APIS /*let's give a chance for OpenCL 1.1 devices*/
#include <CL/cl.hpp>
#include <GLES2/gl2.h>
#include <EGL/egl.h>
#include <opencv2/core.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/core/ocl.hpp>
#include "common.hpp"
const char oclProgB2B[] = "// clBuffer to clBuffer";
const char oclProgI2B[] = "// clImage to clBuffer";
const char oclProgI2I[] = \
"__constant sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE | CLK_ADDRESS_CLAMP_TO_EDGE | CLK_FILTER_NEAREST; \n" \
"\n" \
"__kernel void Laplacian( \n" \
" __read_only image2d_t imgIn, \n" \
" __write_only image2d_t imgOut \n" \
" ) { \n" \
" \n" \
" const int2 pos = {get_global_id(0), get_global_id(1)}; \n" \
" \n" \
" float4 sum = (float4) 0.0f; \n" \
" sum += read_imagef(imgIn, sampler, pos + (int2)(-1,0)); \n" \
" sum += read_imagef(imgIn, sampler, pos + (int2)(+1,0)); \n" \
" sum += read_imagef(imgIn, sampler, pos + (int2)(0,-1)); \n" \
" sum += read_imagef(imgIn, sampler, pos + (int2)(0,+1)); \n" \
" sum -= read_imagef(imgIn, sampler, pos) * 4; \n" \
" \n" \
" write_imagef(imgOut, pos, sum*10); \n" \
"} \n";
void dumpCLinfo()
{
LOGD("*** OpenCL info ***");
try
{
std::vector<cl::Platform> platforms;
cl::Platform::get(&platforms);
LOGD("OpenCL info: Found %d OpenCL platforms", platforms.size());
for (int i = 0; i < platforms.size(); ++i)
{
std::string name = platforms[i].getInfo<CL_PLATFORM_NAME>();
std::string version = platforms[i].getInfo<CL_PLATFORM_VERSION>();
std::string profile = platforms[i].getInfo<CL_PLATFORM_PROFILE>();
std::string extensions = platforms[i].getInfo<CL_PLATFORM_EXTENSIONS>();
LOGD( "OpenCL info: Platform[%d] = %s, ver = %s, prof = %s, ext = %s",
i, name.c_str(), version.c_str(), profile.c_str(), extensions.c_str() );
}
std::vector<cl::Device> devices;
platforms[0].getDevices(CL_DEVICE_TYPE_ALL, &devices);
for (int i = 0; i < devices.size(); ++i)
{
std::string name = devices[i].getInfo<CL_DEVICE_NAME>();
std::string extensions = devices[i].getInfo<CL_DEVICE_EXTENSIONS>();
cl_ulong type = devices[i].getInfo<CL_DEVICE_TYPE>();
LOGD( "OpenCL info: Device[%d] = %s (%s), ext = %s",
i, name.c_str(), (type==CL_DEVICE_TYPE_GPU ? "GPU" : "CPU"), extensions.c_str() );
}
}
catch(cl::Error& e)
{
LOGE( "OpenCL info: error while gathering OpenCL info: %s (%d)", e.what(), e.err() );
}
catch(std::exception& e)
{
LOGE( "OpenCL info: error while gathering OpenCL info: %s", e.what() );
}
catch(...)
{
LOGE( "OpenCL info: unknown error while gathering OpenCL info" );
}
LOGD("*******************");
}
cl::Context theContext;
cl::CommandQueue theQueue;
cl::Program theProgB2B, theProgI2B, theProgI2I;
bool haveOpenCL = false;
extern "C" void initCL()
{
dumpCLinfo();
EGLDisplay mEglDisplay = eglGetCurrentDisplay();
if (mEglDisplay == EGL_NO_DISPLAY)
LOGE("initCL: eglGetCurrentDisplay() returned 'EGL_NO_DISPLAY', error = %x", eglGetError());
EGLContext mEglContext = eglGetCurrentContext();
if (mEglContext == EGL_NO_CONTEXT)
LOGE("initCL: eglGetCurrentContext() returned 'EGL_NO_CONTEXT', error = %x", eglGetError());
cl_context_properties props[] =
{ CL_GL_CONTEXT_KHR, (cl_context_properties) mEglContext,
CL_EGL_DISPLAY_KHR, (cl_context_properties) mEglDisplay,
CL_CONTEXT_PLATFORM, 0,
0 };
try
{
haveOpenCL = false;
cl::Platform p = cl::Platform::getDefault();
std::string ext = p.getInfo<CL_PLATFORM_EXTENSIONS>();
if(ext.find("cl_khr_gl_sharing") == std::string::npos)
LOGE("Warning: CL-GL sharing isn't supported by PLATFORM");
props[5] = (cl_context_properties) p();
theContext = cl::Context(CL_DEVICE_TYPE_GPU, props);
std::vector<cl::Device> devs = theContext.getInfo<CL_CONTEXT_DEVICES>();
LOGD("Context returned %d devices, taking the 1st one", devs.size());
ext = devs[0].getInfo<CL_DEVICE_EXTENSIONS>();
if(ext.find("cl_khr_gl_sharing") == std::string::npos)
LOGE("Warning: CL-GL sharing isn't supported by DEVICE");
theQueue = cl::CommandQueue(theContext, devs[0]);
cl::Program::Sources src(1, std::make_pair(oclProgI2I, sizeof(oclProgI2I)));
theProgI2I = cl::Program(theContext, src);
theProgI2I.build(devs);
cv::ocl::attachContext(p.getInfo<CL_PLATFORM_NAME>(), p(), theContext(), devs[0]());
if( cv::ocl::useOpenCL() )
LOGD("OpenCV+OpenCL works OK!");
else
LOGE("Can't init OpenCV with OpenCL TAPI");
haveOpenCL = true;
}
catch(cl::Error& e)
{
LOGE("cl::Error: %s (%d)", e.what(), e.err());
}
catch(std::exception& e)
{
LOGE("std::exception: %s", e.what());
}
catch(...)
{
LOGE( "OpenCL info: unknown error while initializing OpenCL stuff" );
}
LOGD("initCL completed");
}
extern "C" void closeCL()
{
}
#define GL_TEXTURE_2D 0x0DE1
void procOCL_I2I(int texIn, int texOut, int w, int h)
{
LOGD("Processing OpenCL Direct (image2d)");
if(!haveOpenCL)
{
LOGE("OpenCL isn't initialized");
return;
}
LOGD("procOCL_I2I(%d, %d, %d, %d)", texIn, texOut, w, h);
cl::ImageGL imgIn (theContext, CL_MEM_READ_ONLY, GL_TEXTURE_2D, 0, texIn);
cl::ImageGL imgOut(theContext, CL_MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, texOut);
std::vector < cl::Memory > images;
images.push_back(imgIn);
images.push_back(imgOut);
int64_t t = getTimeMs();
theQueue.enqueueAcquireGLObjects(&images);
theQueue.finish();
LOGD("enqueueAcquireGLObjects() costs %d ms", getTimeInterval(t));
t = getTimeMs();
cl::Kernel Laplacian(theProgI2I, "Laplacian"); //TODO: may be done once
Laplacian.setArg(0, imgIn);
Laplacian.setArg(1, imgOut);
theQueue.finish();
LOGD("Kernel() costs %d ms", getTimeInterval(t));
t = getTimeMs();
theQueue.enqueueNDRangeKernel(Laplacian, cl::NullRange, cl::NDRange(w, h), cl::NullRange);
theQueue.finish();
LOGD("enqueueNDRangeKernel() costs %d ms", getTimeInterval(t));
t = getTimeMs();
theQueue.enqueueReleaseGLObjects(&images);
theQueue.finish();
LOGD("enqueueReleaseGLObjects() costs %d ms", getTimeInterval(t));
}
void procOCL_OCV(int texIn, int texOut, int w, int h)
{
LOGD("Processing OpenCL via OpenCV");
if(!haveOpenCL)
{
LOGE("OpenCL isn't initialized");
return;
}
int64_t t = getTimeMs();
cl::ImageGL imgIn (theContext, CL_MEM_READ_ONLY, GL_TEXTURE_2D, 0, texIn);
std::vector < cl::Memory > images(1, imgIn);
theQueue.enqueueAcquireGLObjects(&images);
theQueue.finish();
cv::UMat uIn, uOut, uTmp;
cv::ocl::convertFromImage(imgIn(), uIn);
LOGD("loading texture data to OpenCV UMat costs %d ms", getTimeInterval(t));
theQueue.enqueueReleaseGLObjects(&images);
t = getTimeMs();
//cv::blur(uIn, uOut, cv::Size(5, 5));
cv::Laplacian(uIn, uTmp, CV_8U);
cv:multiply(uTmp, 10, uOut);
cv::ocl::finish();
LOGD("OpenCV processing costs %d ms", getTimeInterval(t));
t = getTimeMs();
cl::ImageGL imgOut(theContext, CL_MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, texOut);
images.clear();
images.push_back(imgOut);
theQueue.enqueueAcquireGLObjects(&images);
cl_mem clBuffer = (cl_mem)uOut.handle(cv::ACCESS_READ);
cl_command_queue q = (cl_command_queue)cv::ocl::Queue::getDefault().ptr();
size_t offset = 0;
size_t origin[3] = { 0, 0, 0 };
size_t region[3] = { w, h, 1 };
CV_Assert(clEnqueueCopyBufferToImage (q, clBuffer, imgOut(), offset, origin, region, 0, NULL, NULL) == CL_SUCCESS);
theQueue.enqueueReleaseGLObjects(&images);
cv::ocl::finish();
LOGD("uploading results to texture costs %d ms", getTimeInterval(t));
}
void drawFrameProcCPU(int w, int h, int texOut)
{
LOGD("Processing on CPU");
int64_t t;
// let's modify pixels in FBO texture in C++ code (on CPU)
static cv::Mat m;
m.create(h, w, CV_8UC4);
// read
t = getTimeMs();
// expecting FBO to be bound
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, m.data);
LOGD("glReadPixels() costs %d ms", getTimeInterval(t));
// modify
t = getTimeMs();
cv::Laplacian(m, m, CV_8U);
m *= 10;
LOGD("Laplacian() costs %d ms", getTimeInterval(t));
// write back
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texOut);
t = getTimeMs();
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, m.data);
LOGD("glTexSubImage2D() costs %d ms", getTimeInterval(t));
}
enum ProcMode {PROC_MODE_NO_PROC=0, PROC_MODE_CPU=1, PROC_MODE_OCL_DIRECT=2, PROC_MODE_OCL_OCV=3};
extern "C" void processFrame(int tex1, int tex2, int w, int h, int mode)
{
switch(mode)
{
//case PROC_MODE_NO_PROC:
case PROC_MODE_CPU:
drawFrameProcCPU(w, h, tex2);
break;
case PROC_MODE_OCL_DIRECT:
procOCL_I2I(tex1, tex2, w, h);
break;
case PROC_MODE_OCL_OCV:
procOCL_OCV(tex1, tex2, w, h);
break;
default:
LOGE("Unexpected processing mode: %d", mode);
}
}