C++ (Cpp) UMat::isContinuous Examples

Example #1

File: vaapi.cpp Project: Microsoft/opencv

void convertFromVASurface(VASurfaceID surface, Size size, OutputArray dst)
{
    (void)surface; (void)dst; (void)size;
#if !defined(HAVE_VAAPI)
    NO_VAAPI_SUPPORT_ERROR;
#elif !defined(HAVE_OPENCL)
    NO_OPENCL_SUPPORT_ERROR;
#else
    if (!contextInitialized)
        CV_Error(cv::Error::OpenCLInitError, "OpenCL: Context for VA-API interop hasn't been created");

    const int dtype = CV_8UC4;

    // TODO Need to specify ACCESS_WRITE here somehow to prevent useless data copying!
    dst.create(size, dtype);
    UMat u = dst.getUMat();

    // TODO Add support for roi
    CV_Assert(u.offset == 0);
    CV_Assert(u.isContinuous());

    cl_mem clBuffer = (cl_mem)u.handle(ACCESS_WRITE);

    using namespace cv::ocl;
    Context& ctx = Context::getDefault();
    cl_context context = (cl_context)ctx.ptr();

    cl_int status = 0;

    cl_mem clImageY = clCreateFromVA_APIMediaSurfaceINTEL(context, CL_MEM_READ_ONLY, &surface, 0, &status);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clCreateFromVA_APIMediaSurfaceINTEL failed (Y plane)");
    cl_mem clImageUV = clCreateFromVA_APIMediaSurfaceINTEL(context, CL_MEM_READ_ONLY, &surface, 1, &status);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clCreateFromVA_APIMediaSurfaceINTEL failed (UV plane)");

    cl_command_queue q = (cl_command_queue)Queue::getDefault().ptr();

    cl_mem images[2] = { clImageY, clImageUV };
    status = clEnqueueAcquireVA_APIMediaSurfacesINTEL(q, 2, images, 0, NULL, NULL);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clEnqueueAcquireVA_APIMediaSurfacesINTEL failed");
    if (!ocl::ocl_convert_nv12_to_bgr(clImageY, clImageUV, clBuffer, (int)u.step[0], u.cols, u.rows))
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: ocl_convert_nv12_to_bgr failed");
    status = clEnqueueReleaseVA_APIMediaSurfacesINTEL(q, 2, images, 0, NULL, NULL);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clEnqueueReleaseVA_APIMediaSurfacesINTEL failed");

    status = clFinish(q); // TODO Use events
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clFinish failed");

    status = clReleaseMemObject(clImageY); // TODO RAII
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clReleaseMem failed (Y plane)");
    status = clReleaseMemObject(clImageUV);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clReleaseMem failed (UV plane)");
#endif
}

Example #2

File: vaapi.cpp Project: Microsoft/opencv

void convertToVASurface(InputArray src, VASurfaceID surface, Size size)
{
    (void)src; (void)surface; (void)size;
#if !defined(HAVE_VAAPI)
    NO_VAAPI_SUPPORT_ERROR;
#elif !defined(HAVE_OPENCL)
    NO_OPENCL_SUPPORT_ERROR;
#else
    if (!contextInitialized)
        CV_Error(cv::Error::OpenCLInitError, "OpenCL: Context for VA-API interop hasn't been created");

    const int stype = CV_8UC4;

    int srcType = src.type();
    CV_Assert(srcType == stype);

    Size srcSize = src.size();
    CV_Assert(srcSize.width == size.width && srcSize.height == size.height);

    UMat u = src.getUMat();

    // TODO Add support for roi
    CV_Assert(u.offset == 0);
    CV_Assert(u.isContinuous());

    cl_mem clBuffer = (cl_mem)u.handle(ACCESS_READ);

    using namespace cv::ocl;
    Context& ctx = Context::getDefault();
    cl_context context = (cl_context)ctx.ptr();

    cl_int status = 0;

    cl_mem clImageY = clCreateFromVA_APIMediaSurfaceINTEL(context, CL_MEM_WRITE_ONLY, &surface, 0, &status);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clCreateFromVA_APIMediaSurfaceINTEL failed (Y plane)");
    cl_mem clImageUV = clCreateFromVA_APIMediaSurfaceINTEL(context, CL_MEM_WRITE_ONLY, &surface, 1, &status);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clCreateFromVA_APIMediaSurfaceINTEL failed (UV plane)");

    cl_command_queue q = (cl_command_queue)Queue::getDefault().ptr();

    cl_mem images[2] = { clImageY, clImageUV };
    status = clEnqueueAcquireVA_APIMediaSurfacesINTEL(q, 2, images, 0, NULL, NULL);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clEnqueueAcquireVA_APIMediaSurfacesINTEL failed");
    if (!ocl::ocl_convert_bgr_to_nv12(clBuffer, (int)u.step[0], u.cols, u.rows, clImageY, clImageUV))
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: ocl_convert_bgr_to_nv12 failed");
    clEnqueueReleaseVA_APIMediaSurfacesINTEL(q, 2, images, 0, NULL, NULL);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clEnqueueReleaseVA_APIMediaSurfacesINTEL failed");

    status = clFinish(q); // TODO Use events
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clFinish failed");

    status = clReleaseMemObject(clImageY); // TODO RAII
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clReleaseMem failed (Y plane)");
    status = clReleaseMemObject(clImageUV);
    if (status != CL_SUCCESS)
        CV_Error(cv::Error::OpenCLApiCallError, "OpenCL: clReleaseMem failed (UV plane)");
#endif
}