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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_NEFFTRADIXSTAGEKERNEL_H
+#define ARM_COMPUTE_NEFFTRADIXSTAGEKERNEL_H
+
+#include "arm_compute/core/KernelDescriptors.h"
+
+#include "src/core/NEON/INEKernel.h"
+
+#include <arm_neon.h>
+#include <set>
+
+namespace arm_compute
+{
+// Forward declarations
+class ITensor;
+
+/** Interface for the FFT kernel. */
+class NEFFTRadixStageKernel : public INEKernel
+{
+public:
+ const char *name() const override
+ {
+ return "NEFFTRadixStageKernel";
+ }
+ /** Constructor */
+ NEFFTRadixStageKernel();
+ /** Prevent instances of this class from being copied (As this class contains pointers) */
+ NEFFTRadixStageKernel(const NEFFTRadixStageKernel &) = delete;
+ /** Prevent instances of this class from being copied (As this class contains pointers) */
+ NEFFTRadixStageKernel &operator=(const NEFFTRadixStageKernel &) = delete;
+ /** Default Move Constructor. */
+ NEFFTRadixStageKernel(NEFFTRadixStageKernel &&) = default;
+ /** Default move assignment operator */
+ NEFFTRadixStageKernel &operator=(NEFFTRadixStageKernel &&) = default;
+ /** Default destructor */
+ ~NEFFTRadixStageKernel() = default;
+ /** Set the input and output tensors.
+ *
+ * @note If the output tensor is nullptr, the FFT will be performed in-place
+ *
+ * @param[in,out] input Source tensor. Data types supported: F32. Number of channels supported: 2 (complex tensor).
+ * @param[out] output Destination tensor. Data type supported: same as @p input. Number of channels supported: same as @p input.
+ * @param[in] config FFT descriptor metadata.
+ */
+ void configure(ITensor *input, ITensor *output, const FFTRadixStageKernelInfo &config);
+ /** Static function to check if given info will lead to a valid configuration of @ref NEFFTRadixStageKernel
+ *
+ * @param[in] input Source tensor info. Data types supported: F32. Number of channels supported: 2 (complex tensor).
+ * @param[in] output Destination tensor info. Data type supported: same as @p input. Number of channels supported: same as @p input.
+ * @param[in] config FFT descriptor metadata.
+ *
+ * @return a status
+ */
+ static Status validate(const ITensorInfo *input, const ITensorInfo *output, const FFTRadixStageKernelInfo &config);
+ /** Returns the radix that are support by the FFT kernel
+ *
+ * @return A set of supported radix
+ */
+ static std::set<unsigned int> supported_radix();
+
+ // Inherited methods overridden:
+ void run(const Window &window, const ThreadInfo &info) override;
+
+private:
+ ITensor *_input;
+ ITensor *_output;
+ unsigned int _Nx;
+ unsigned int _axis;
+ unsigned int _radix;
+
+ void set_radix_stage_axis0(const FFTRadixStageKernelInfo &config);
+ void set_radix_stage_axis1(const FFTRadixStageKernelInfo &config);
+
+ using FFTFunctionPointerAxis0 =
+ std::function<void(float *, float *, unsigned int, unsigned int, const float32x2_t &, unsigned int)>;
+ using FFTFunctionPointerAxis1 = std::function<void(float *,
+ float *,
+ unsigned int,
+ unsigned int,
+ const float32x2_t &,
+ unsigned int,
+ unsigned int,
+ unsigned int,
+ unsigned int)>;
+
+ FFTFunctionPointerAxis0 _func_0;
+ FFTFunctionPointerAxis1 _func_1;
+};
+} // namespace arm_compute
+#endif /*ARM_COMPUTE_NEFFTRADIXSTAGEKERNEL_H */