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/*
* Copyright (c) 2016-2018 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* 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
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __ARM_COMPUTE_CLMEANSTDDEVKERNEL_H__
#define __ARM_COMPUTE_CLMEANSTDDEVKERNEL_H__
#include "arm_compute/core/CL/ICLKernel.h"
namespace cl
{
class Buffer;
}
namespace arm_compute
{
class ICLTensor;
using ICLImage = ICLTensor;
/** Interface for the kernel to calculate mean and standard deviation of input image pixels. */
class CLMeanStdDevKernel : public ICLKernel
{
public:
/** Default constructor */
CLMeanStdDevKernel();
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLMeanStdDevKernel(const CLMeanStdDevKernel &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLMeanStdDevKernel &operator=(const CLMeanStdDevKernel &) = delete;
/** Allow instances of this class to be moved */
CLMeanStdDevKernel(CLMeanStdDevKernel &&) = default;
/** Allow instances of this class to be moved */
CLMeanStdDevKernel &operator=(CLMeanStdDevKernel &&) = default;
/** Initialise the kernel's input and outputs.
*
* @param[in] input Input image. Data types supported: U8.
* @param[out] mean Input average pixel value.
* @param[out] global_sum Keeps global sum of pixel values (Buffer size: 1 cl_ulong).
* @param[out] stddev (Optional) Output standard deviation of pixel values.
* @param[out] global_sum_squared (Optional if stddev is not set, required if stddev is set) Keeps global sum of squared pixel values (Buffer size: 1 cl_ulong).
*/
void configure(const ICLImage *input, float *mean, cl::Buffer *global_sum, float *stddev = nullptr, cl::Buffer *global_sum_squared = nullptr);
/** Static function to check if given info will lead to a valid configuration of @ref CLMeanStdDevKernel.
*
* @param[in] input Input image info. Data types supported: U8.
* @param[in] mean Input average pixel value.
* @param[in] global_sum Keeps global sum of pixel values.
* @param[in] stddev (Optional) Output standard deviation of pixel values.
* @param[in] global_sum_squared (Optional if stddev is not set, required if stddev is set) Keeps global sum of squared pixel values.
*
* @return a status
*/
static Status validate(const ITensorInfo *input, float *mean, cl::Buffer *global_sum, float *stddev = nullptr, cl::Buffer *global_sum_squared = nullptr);
// Inherited methods overridden:
void run(const Window &window, cl::CommandQueue &queue) override;
BorderSize border_size() const override;
private:
const ICLImage *_input;
float *_mean;
float *_stddev;
cl::Buffer *_global_sum;
cl::Buffer *_global_sum_squared;
BorderSize _border_size;
};
} // namespace arm_compute
#endif /* __ARM_COMPUTE_CLMEANSTDDEVKERNEL_H__ */
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