OpenCV_countNonZero.cpp

/*
Copyright (c) 2015 - 2024 Advanced Micro Devices, Inc. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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THE SOFTWARE.
*/

#include "internal_publishKernels.h"

/************************************************************************************************************
input parameter validator.
param [in] node The handle to the node.
param [in] index The index of the parameter to validate.
*************************************************************************************************************/
static vx_status VX_CALLBACK CV_countNonZero_InputValidator(vx_node node, vx_uint32 index)
{
    vx_status status = VX_SUCCESS;
    vx_parameter param = vxGetParameterByIndex(node, index);

    if (index == 0)
    {
        vx_image image;
        vx_df_image df_image = VX_DF_IMAGE_VIRT;
        STATUS_ERROR_CHECK(vxQueryParameter(param, VX_PARAMETER_ATTRIBUTE_REF, &image, sizeof(vx_image)));
        STATUS_ERROR_CHECK(vxQueryImage(image, VX_IMAGE_ATTRIBUTE_FORMAT, &df_image, sizeof(df_image)));
        if (df_image != VX_DF_IMAGE_U8 && df_image != VX_DF_IMAGE_S16)
        {
            status = VX_ERROR_INVALID_VALUE;
        }
        vxReleaseImage(&image);
    }

    else if (index == 1)
    {
        vx_scalar scalar = 0;
        vx_enum type = 0;
        vx_int32 value = 0;
        STATUS_ERROR_CHECK(vxQueryParameter(param, VX_PARAMETER_ATTRIBUTE_REF, &scalar, sizeof(scalar)));
        STATUS_ERROR_CHECK(vxQueryScalar(scalar, VX_SCALAR_ATTRIBUTE_TYPE, &type, sizeof(type)));
        STATUS_ERROR_CHECK(vxReadScalarValue(scalar, &value));
        if (value < 0 || type != VX_TYPE_INT32)
        {
            status = VX_ERROR_INVALID_VALUE;
        }
        vxReleaseScalar(&scalar);
    }

    vxReleaseParameter(&param);
    return status;
}

/************************************************************************************************************
output parameter validator.
*************************************************************************************************************/
static vx_status VX_CALLBACK CV_countNonZero_OutputValidator(vx_node node, vx_uint32 index, vx_meta_format meta)
{
    vx_status status = VX_SUCCESS;
    if (index == 1)
    {
        vx_parameter output_param = vxGetParameterByIndex(node, 1);
        vx_scalar output;
        vx_scalar scalar = 0;
        vx_enum type = 0;
        vx_int32 value = 0;

        STATUS_ERROR_CHECK(vxQueryParameter(output_param, VX_PARAMETER_ATTRIBUTE_REF, &scalar, sizeof(scalar)));
        STATUS_ERROR_CHECK(vxReadScalarValue(scalar, &value));

        vxReleaseScalar(&output);
        vxReleaseParameter(&output_param);
    }
    return status;
}

/************************************************************************************************************
Execution Kernel
*************************************************************************************************************/
static vx_status VX_CALLBACK CV_countNonZero_Kernel(vx_node node, const vx_reference *parameters, vx_uint32 num)
{
    vx_status status = VX_SUCCESS;
    vx_image image_in = (vx_image) parameters[0];
    vx_scalar scalar = (vx_scalar) parameters[1];
    Mat *mat;
    int NonZero;

    //Converting VX Image to OpenCV Mat
    STATUS_ERROR_CHECK(VX_to_CV_Image(&mat, image_in));

    //Compute using OpenCV
    NonZero = cv::countNonZero(*mat);

    //Converting int to Scalar
    STATUS_ERROR_CHECK(vxWriteScalarValue(scalar, &NonZero));

    return status;
}

/************************************************************************************************************
Function to Register the Kernel for Publish
*************************************************************************************************************/
vx_status CV_countNonZero_Register(vx_context context)
{
    vx_status status = VX_SUCCESS;
    vx_kernel kernel = vxAddKernel(context,
                                   "org.opencv.countnonzero",
                                   VX_KERNEL_OPENCV_COUNT_NON_ZERO,
                                   CV_countNonZero_Kernel,
                                   2,
                                   CV_countNonZero_InputValidator,
                                   CV_countNonZero_OutputValidator,
                                   nullptr,
                                   nullptr);

    if (kernel)
    {
        PARAM_ERROR_CHECK(vxAddParameterToKernel(kernel, 0, VX_INPUT, VX_TYPE_IMAGE, VX_PARAMETER_STATE_REQUIRED));
        PARAM_ERROR_CHECK(vxAddParameterToKernel(kernel, 1, VX_BIDIRECTIONAL, VX_TYPE_SCALAR, VX_PARAMETER_STATE_REQUIRED));
        PARAM_ERROR_CHECK(vxFinalizeKernel(kernel));
    }

    if (status != VX_SUCCESS)
    {
exit:
        vxRemoveKernel(kernel);
        return VX_FAILURE;
    }

    return status;
}