1 /* 2 * Copyright (c) 2016-2020 Arm Limited. 3 * 4 * SPDX-License-Identifier: MIT 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in all 14 * copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24 #ifndef ARM_COMPUTE_NENONMAXIMASUPPRESSION3x3KERNEL_H 25 #define ARM_COMPUTE_NENONMAXIMASUPPRESSION3x3KERNEL_H 26 27 #include "src/core/NEON/INEKernel.h" 28 29 #include <cstdint> 30 31 namespace arm_compute 32 { 33 class ITensor; 34 35 /** Interface to perform Non-Maxima suppression over a 3x3 window using NEON 36 * 37 * @note Used by @ref NEFastCorners and @ref NEHarrisCorners 38 */ 39 class NENonMaximaSuppression3x3Kernel : public INEKernel 40 { 41 public: name()42 const char *name() const override 43 { 44 return "NENonMaximaSuppression3x3Kernel"; 45 } 46 /** Default constructor */ 47 NENonMaximaSuppression3x3Kernel(); 48 /** Prevent instances of this class from being copied (As this class contains pointers) */ 49 NENonMaximaSuppression3x3Kernel(const NENonMaximaSuppression3x3Kernel &) = delete; 50 /** Prevent instances of this class from being copied (As this class contains pointers) */ 51 NENonMaximaSuppression3x3Kernel &operator=(const NENonMaximaSuppression3x3Kernel &) = delete; 52 /** Allow instances of this class to be moved */ 53 NENonMaximaSuppression3x3Kernel(NENonMaximaSuppression3x3Kernel &&) = default; 54 /** Allow instances of this class to be moved */ 55 NENonMaximaSuppression3x3Kernel &operator=(NENonMaximaSuppression3x3Kernel &&) = default; 56 /** Default destructor */ 57 ~NENonMaximaSuppression3x3Kernel() = default; 58 59 /** Initialise the kernel's sources, destinations and border mode. 60 * 61 * @param[in] input Source tensor. Data types supported: U8/F32 62 * @param[out] output Destination tensor. Data types supported: same as @p input 63 * @param[in] border_undefined True if the border mode is undefined. False if it's replicate or constant. 64 */ 65 void configure(const ITensor *input, ITensor *output, bool border_undefined); 66 67 // Inherited methods overridden: 68 void run(const Window &window, const ThreadInfo &info) override; 69 BorderSize border_size() const override; 70 71 protected: 72 /** Common signature for all the specialised non-maxima suppression 3x3 functions 73 * 74 * @param[in] input_ptr Pointer to the input tensor. 75 * @param[out] output_ptr Pointer to the output tensor 76 * @param[in] input_stride Stride of the input tensor 77 */ 78 using NonMaxSuppr3x3Function = void(const void *__restrict input_ptr, void *__restrict output_ptr, const uint32_t input_stride); 79 80 NonMaxSuppr3x3Function *_func; /**< Non-Maxima suppression function to use for the particular tensor types passed to configure() */ 81 const ITensor *_input; /**< Source tensor */ 82 ITensor *_output; /**< Destination tensor */ 83 }; 84 85 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC 86 /** NEON kernel to perform Non-Maxima suppression 3x3 with intermediate results in FP16 if the input data type is FP32 87 */ 88 class NENonMaximaSuppression3x3FP16Kernel : public NENonMaximaSuppression3x3Kernel 89 { 90 public: name()91 const char *name() const override 92 { 93 return "NENonMaximaSuppression3x3FP16Kernel"; 94 } 95 /** Initialise the kernel's sources, destinations and border mode. 96 * 97 * @param[in] input Source tensor. Data types supported: U8/F32. 98 * @param[out] output Destination tensor. Data types supported: same as @p input 99 * @param[in] border_undefined True if the border mode is undefined. False if it's replicate or constant. 100 */ 101 void configure(const ITensor *input, ITensor *output, bool border_undefined); 102 }; 103 #else /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */ 104 /** NEON kernel to perform Non-Maxima suppression 3x3 with intermediate results in FP16 if the input data type is FP32 */ 105 using NENonMaximaSuppression3x3FP16Kernel = NENonMaximaSuppression3x3Kernel; 106 #endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */ 107 } // namespace arm_compute 108 #endif /* _ARM_COMPUTE_NENONMAXIMASUPPRESSION3x3KERNEL_H */ 109