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/*
* Copyright (c) 2016-2020 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_NENONMAXIMASUPPRESSION3x3KERNEL_H
#define ARM_COMPUTE_NENONMAXIMASUPPRESSION3x3KERNEL_H
#include "src/core/NEON/INEKernel.h"
#include <cstdint>
namespace arm_compute
{
class ITensor;
/** Interface to perform Non-Maxima suppression over a 3x3 window using NEON
*
* @note Used by @ref NEFastCorners and @ref NEHarrisCorners
*/
class NENonMaximaSuppression3x3Kernel : public INEKernel
{
public:
const char *name() const override
{
return "NENonMaximaSuppression3x3Kernel";
}
/** Default constructor */
NENonMaximaSuppression3x3Kernel();
/** Prevent instances of this class from being copied (As this class contains pointers) */
NENonMaximaSuppression3x3Kernel(const NENonMaximaSuppression3x3Kernel &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
NENonMaximaSuppression3x3Kernel &operator=(const NENonMaximaSuppression3x3Kernel &) = delete;
/** Allow instances of this class to be moved */
NENonMaximaSuppression3x3Kernel(NENonMaximaSuppression3x3Kernel &&) = default;
/** Allow instances of this class to be moved */
NENonMaximaSuppression3x3Kernel &operator=(NENonMaximaSuppression3x3Kernel &&) = default;
/** Default destructor */
~NENonMaximaSuppression3x3Kernel() = default;
/** Initialise the kernel's sources, destinations and border mode.
*
* @param[in] input Source tensor. Data types supported: U8/F32
* @param[out] output Destination tensor. Data types supported: same as @p input
* @param[in] border_undefined True if the border mode is undefined. False if it's replicate or constant.
*/
void configure(const ITensor *input, ITensor *output, bool border_undefined);
// Inherited methods overridden:
void run(const Window &window, const ThreadInfo &info) override;
BorderSize border_size() const override;
protected:
/** Common signature for all the specialised non-maxima suppression 3x3 functions
*
* @param[in] input_ptr Pointer to the input tensor.
* @param[out] output_ptr Pointer to the output tensor
* @param[in] input_stride Stride of the input tensor
*/
using NonMaxSuppr3x3Function = void(const void *__restrict input_ptr, void *__restrict output_ptr, const uint32_t input_stride);
NonMaxSuppr3x3Function *_func; /**< Non-Maxima suppression function to use for the particular tensor types passed to configure() */
const ITensor *_input; /**< Source tensor */
ITensor *_output; /**< Destination tensor */
};
#ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
/** NEON kernel to perform Non-Maxima suppression 3x3 with intermediate results in FP16 if the input data type is FP32
*/
class NENonMaximaSuppression3x3FP16Kernel : public NENonMaximaSuppression3x3Kernel
{
public:
const char *name() const override
{
return "NENonMaximaSuppression3x3FP16Kernel";
}
/** Initialise the kernel's sources, destinations and border mode.
*
* @param[in] input Source tensor. Data types supported: U8/F32.
* @param[out] output Destination tensor. Data types supported: same as @p input
* @param[in] border_undefined True if the border mode is undefined. False if it's replicate or constant.
*/
void configure(const ITensor *input, ITensor *output, bool border_undefined);
};
#else /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
/** NEON kernel to perform Non-Maxima suppression 3x3 with intermediate results in FP16 if the input data type is FP32 */
using NENonMaximaSuppression3x3FP16Kernel = NENonMaximaSuppression3x3Kernel;
#endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
} // namespace arm_compute
#endif /* _ARM_COMPUTE_NENONMAXIMASUPPRESSION3x3KERNEL_H */
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