src/cpu/operators/CpuScale.h

/*
 * Copyright (c) 2021-2022 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
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#ifndef ARM_COMPUTE_CPU_SCALE_H
#define ARM_COMPUTE_CPU_SCALE_H

#include "arm_compute/core/experimental/Types.h"
#include "arm_compute/core/ITensorInfo.h"
#include "arm_compute/core/KernelDescriptors.h"

#include "src/cpu/ICpuKernel.h"
#include "src/cpu/ICpuOperator.h"

#include <memory>

namespace arm_compute
{
namespace cpu
{
/** Basic function to compute Scale */
class CpuScale : public ICpuOperator
{
public:
    /** Initialize the function's source, destination, interpolation type and border_mode.
     *
     * @param[in, out] src  Source tensor info. Data type supported: QASYMM8/QASYMM8_SIGNED/U8/S16/F16/F32. (Written to only for @p border_mode != UNDEFINED)
     * @param[out]     dst  Destination tensor info. Data type supported: Same as @p src. All but the lowest two dimensions must be the same size as in the input tensor, i.e. scaling is only performed within the XY-plane.
     * @param[in]      info @ref ScaleKernelInfo to be used for configuration
     *
     * @note Using S8 data type only supports NHWC, @p border_mode Replicate, and @p policy Bilinear
     */
    void configure(ITensorInfo *src, ITensorInfo *dst, const ScaleKernelInfo &info);
    /** Static function to check if given info will lead to a valid configuration
     *
     * Similar to @ref CpuScale::configure()
     *
     * @return a status
     */
    static Status validate(const ITensorInfo *src, const ITensorInfo *dst, const ScaleKernelInfo &info);

    // Inherited methods overridden:
    void prepare(ITensorPack &tensors) override;
    void run(ITensorPack &tensors) override;

private:
    ScaleKernelInfo _scale_info{InterpolationPolicy::NEAREST_NEIGHBOR, BorderMode::UNDEFINED};
    DataLayout      _data_layout{DataLayout::UNKNOWN};
    bool            _is_prepared{false};
};
} // namespace cpu
} // namespace arm_compute
#endif /* ARM_COMPUTE_CPU_SCALE_H */