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/*
* Copyright (c) 2019-2021 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_NEFFT1D_H
#define ARM_COMPUTE_NEFFT1D_H
#include "arm_compute/runtime/IFunction.h"
#include "arm_compute/runtime/FunctionDescriptors.h"
#include "arm_compute/runtime/MemoryGroup.h"
#include "arm_compute/runtime/Tensor.h"
#include <memory>
namespace arm_compute
{
// Forward declaration
class ITensor;
class NEFFTDigitReverseKernel;
class NEFFTRadixStageKernel;
class NEFFTScaleKernel;
/** Basic function to execute one dimensional FFT. This function calls the following Neon kernels:
*
* -# @ref NEFFTDigitReverseKernel Performs digit reverse
* -# @ref NEFFTRadixStageKernel A list of FFT kernels depending on the radix decomposition
* -# @ref NEFFTScaleKernel Performs output scaling in case of in inverse FFT
*/
class NEFFT1D : public IFunction
{
public:
/** Default Constructor */
NEFFT1D(std::shared_ptr<IMemoryManager> memory_manager = nullptr);
/** Prevent instances of this class from being copied (As this class contains pointers) */
NEFFT1D(const NEFFT1D &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
NEFFT1D &operator=(const NEFFT1D &) = delete;
/** Prevent instances of this class from being moved (As this class contains non movable objects) */
NEFFT1D(NEFFT1D &&) = delete;
/** Prevent instances of this class from being moved (As this class contains non movable objects) */
NEFFT1D &operator=(NEFFT1D &&) = delete;
/** Default destructor */
~NEFFT1D();
/** Initialise the function's source and destinations.
*
* @param[in] input Source tensor. Data types supported: F32. Number of channels supported: 1 (real tensor) or 2 (complex tensor).
* @param[out] output Destination tensor. Data types and data layouts supported: Same as @p input.
* Number of channels supported: 1 (real tensor) or 2 (complex tensor).If @p input is real, @p output must be complex.
* @param[in] config FFT related configuration
*/
void configure(const ITensor *input, ITensor *output, const FFT1DInfo &config);
/** Static function to check if given info will lead to a valid configuration of @ref NEFFT1D.
*
* @param[in] input Source tensor info. Data types supported: F32.
* @param[in] output Destination tensor info. Data types and data layouts supported: Same as @p input.
* @param[in] config FFT related configuration
*
* @return a status
*/
static Status validate(const ITensorInfo *input, const ITensorInfo *output, const FFT1DInfo &config);
// Inherited methods overridden:
void run() override;
protected:
MemoryGroup _memory_group;
std::unique_ptr<NEFFTDigitReverseKernel> _digit_reverse_kernel;
std::vector<std::unique_ptr<NEFFTRadixStageKernel>> _fft_kernels;
std::unique_ptr<NEFFTScaleKernel> _scale_kernel;
Tensor _digit_reversed_input;
Tensor _digit_reverse_indices;
unsigned int _num_ffts;
unsigned int _axis;
bool _run_scale;
};
} // namespace arm_compute
#endif /*ARM_COMPUTE_NEFFT1D_H */
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