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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_NEABSOLUTEDIFFERENCEKERNEL_H
+#define ARM_COMPUTE_NEABSOLUTEDIFFERENCEKERNEL_H
+
+#include "src/core/NEON/INEKernel.h"
+
+namespace arm_compute
+{
+class ITensor;
+
+/** Interface for the absolute difference kernel
+ *
+ * Absolute difference is computed by:
+ * @f[ output(x,y) = | input1(x,y) - input2(x,y) | @f]
+ */
+class NEAbsoluteDifferenceKernel : public INEKernel
+{
+public:
+ const char *name() const override
+ {
+ return "NEAbsoluteDifferenceKernel";
+ }
+ /** Default constructor */
+ NEAbsoluteDifferenceKernel();
+ /** Prevent instances of this class from being copied (As this class contains pointers) */
+ NEAbsoluteDifferenceKernel(const NEAbsoluteDifferenceKernel &) = delete;
+ /** Prevent instances of this class from being copied (As this class contains pointers) */
+ NEAbsoluteDifferenceKernel &operator=(const NEAbsoluteDifferenceKernel &) = delete;
+ /** Allow instances of this class to be moved */
+ NEAbsoluteDifferenceKernel(NEAbsoluteDifferenceKernel &&) = default;
+ /** Allow instances of this class to be moved */
+ NEAbsoluteDifferenceKernel &operator=(NEAbsoluteDifferenceKernel &&) = default;
+ /** Default destructor */
+ ~NEAbsoluteDifferenceKernel() = default;
+
+ /** Set the inputs and output tensors
+ *
+ * @param[in] input1 Source tensor. Data types supported: U8/S16
+ * @param[in] input2 Source tensor. Data types supported: U8/S16
+ * @param[out] output Destination tensor, Data types supported: U8/S16
+ */
+ void configure(const ITensor *input1, const ITensor *input2, ITensor *output);
+
+ // Inherited methods overridden:
+ void run(const Window &window, const ThreadInfo &info) override;
+
+private:
+ /** Common signature for all the specialised absolute difference functions
+ *
+ * @param[in] input1 An input tensor. Data types supported: U8/S16.
+ * @param[in] input2 An input tensor. Data types supported: U8/S16.
+ * @param[out] output The output tensor, Data types supported: U8 (Only if both inputs are U8), S16.
+ * @param[in] window Region on which to execute the kernel.
+ */
+ using AbsDiffFunction = void(const ITensor *input1, const ITensor *input2, ITensor *output, const Window &window);
+
+ /** Absolute difference function to use for the particular tensor formats passed to configure() */
+ AbsDiffFunction *_func;
+ const ITensor *_input1;
+ const ITensor *_input2;
+ ITensor *_output;
+};
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_NEABSOLUTEDIFFERENCEKERNEL_H */