Function runR2C_FFT_WithCallback

src/callback-client/callback-client.cpp:110–245

template < typename T >
void runR2C_FFT_WithCallback(std::auto_ptr< clfftSetupData > setupData, cl_context context, cl_command_queue commandQueue,
						size_t* inlengths, clfftDim dim, clfftPrecision precision,
						size_t batchSize, size_t vectorLength, size_t fftLength, cl_uint profile_count)
{
	cl_int status = 0;
	
	//input/output allocation sizes
	size_t in_size_of_buffers = fftLength * sizeof(uint24_t);
	size_t out_size_of_buffers = fftLength * sizeof( T  );

	uint24_t *input24bitData = (uint24_t*)malloc(in_size_of_buffers);

	//Initialize Data
	srand(1);
	for (size_t idx = 0; idx < fftLength; ++idx)
	{
		int randomVal = (int)rand();

		input24bitData[idx][0] = (randomVal >> 16) & 0xFF;
        input24bitData[idx][1] = (randomVal >> 8) & 0xFF;
        input24bitData[idx][2] = randomVal & 0xFF; 
	}
	
	//input data buffer
	cl_mem infftbuffer = ::clCreateBuffer( context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, in_size_of_buffers, (void*)input24bitData, &status);
    OPENCL_V_THROW( status, "Creating Buffer ( ::clCreateBuffer(infftbuffer) )" );

	//out-place transform. 	
	cl_mem outfftbuffer = ::clCreateBuffer( context, CL_MEM_READ_WRITE, out_size_of_buffers, NULL, &status);
    OPENCL_V_THROW( status, "Creating Buffer ( ::clCreateBuffer(oufftbuffer) )" );

	//clFFT initializations
	
	//	FFT state
	clfftResultLocation	place = CLFFT_OUTOFPLACE;
	clfftLayout	inLayout  = CLFFT_REAL;
	clfftLayout	outLayout = CLFFT_HERMITIAN_INTERLEAVED;

	clfftPlanHandle plan_handle;
	OPENCL_V_THROW( clfftSetup( setupData.get( ) ), "clfftSetup failed" );
	OPENCL_V_THROW( clfftCreateDefaultPlan( &plan_handle, context, dim, inlengths ), "clfftCreateDefaultPlan failed" );

	//Precallback setup
	char* precallbackstr = STRINGIFY(ConvertToFloat);

	//Postcallback setup
	char* postcallbackstr = STRINGIFY(MagnitudeExtraction);

	//Register the callback
	OPENCL_V_THROW (clfftSetPlanCallback(plan_handle, "convert24To32bit", precallbackstr, 0, PRECALLBACK, NULL, 0), "clFFTSetPlanCallback failed");
	OPENCL_V_THROW (clfftSetPlanCallback(plan_handle, "extractMagnitude", postcallbackstr, 0, POSTCALLBACK, NULL, 0), "clFFTSetPlanCallback failed");

	//	Default plan creates a plan that expects an inPlace transform with interleaved complex numbers
	OPENCL_V_THROW( clfftSetResultLocation( plan_handle, place ), "clfftSetResultLocation failed" );
	OPENCL_V_THROW( clfftSetLayout( plan_handle, inLayout, outLayout ), "clfftSetLayout failed" );
	OPENCL_V_THROW( clfftSetPlanBatchSize( plan_handle, batchSize ), "clfftSetPlanBatchSize failed" );
	OPENCL_V_THROW( clfftSetPlanPrecision( plan_handle, precision ), "clfftSetPlanPrecision failed" );
	OPENCL_V_THROW( clfftSetPlanDistance( plan_handle, BATCH_LENGTH + 2, (BATCH_LENGTH/2 + 1)), "clfftSetPlanDistance failed" );