COMPMID-1963: Implement FFT (2D) on NEON

Change-Id: I3b564be8d7949e00c6544071ef62dd51de838c96
Signed-off-by: giuros01 <giuseppe.rossini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1048
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>

1 files changed, 12 insertions, 7 deletions

diff --git a/arm_compute/runtime/NEON/functions/NEFFT1D.h b/arm_compute/runtime/NEON/functions/NEFFT1D.h
index 9b5ada746a..c706936f77 100644
--- a/arm_compute/runtime/NEON/functions/NEFFT1D.h
+++ b/arm_compute/runtime/NEON/functions/NEFFT1D.h
@@ -26,6 +26,7 @@
 
 #include "arm_compute/core/NEON/kernels/NEFFTDigitReverseKernel.h"
 #include "arm_compute/core/NEON/kernels/NEFFTRadixStageKernel.h"
+#include "arm_compute/core/NEON/kernels/NEFFTScaleKernel.h"
 #include "arm_compute/runtime/IFunction.h"
 
 #include "arm_compute/runtime/FunctionDescriptors.h"
@@ -37,24 +38,25 @@ namespace arm_compute
 // Forward declaration
 class ITensor;
 
-/** Basic function to execute one dimensional FFT. This function calls the following OpenCL kernels:
+/** Basic function to execute one dimensional FFT. This function calls the following NEON kernels:
  *
- * -# @ref CLFFTDigitReverseKernel Performs digit reverse
+ * -# @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);
-    /** Initialise the function's source, destinations and border mode.
+    /** Initialise the function's source and destinations.
      *
      * @param[in]  input  Source tensor. Data types supported: F32.
      * @param[out] output Destination tensor. Data types and data layouts supported: Same as @p input.
      * @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 CLFFT1D.
+    /** 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.
@@ -69,11 +71,14 @@ public:
 
 protected:
     MemoryGroup                        _memory_group;
-    Tensor                             _digit_reversed_input;
-    Tensor                             _digit_reverse_indices;
     NEFFTDigitReverseKernel            _digit_reverse_kernel;
     std::vector<NEFFTRadixStageKernel> _fft_kernels;
-    unsigned int                       _n_ffts;
+    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__ */