Add ops/depth_to_space files

mace/ops/depth_to_space.cc

+//
+// Copyright (c) 2017 XiaoMi All rights reserved.
+//
+
+#include "mace/ops/depth_to_space.h"
+
+namespace mace {
+namespace ops {
+
+void Register_DepthToSpace(OperatorRegistry *op_registry) {
+  REGISTER_OPERATOR(op_registry, OpKeyBuilder("DepthToSpace")
+                                     .Device(DeviceType::OPENCL)
+                                     .TypeConstraint<float>("T")
+                                     .Build(),
+                    DepthToSpaceOp<DeviceType::OPENCL, float>);
+  REGISTER_OPERATOR(op_registry, OpKeyBuilder("DepthToSpace")
+                                     .Device(DeviceType::OPENCL)
+                                     .TypeConstraint<half>("T")
+                                     .Build(),
+                    DepthToSpaceOp<DeviceType::OPENCL, half>);
+}
+
+}  // namespace ops
+}  // namespace mace

mace/ops/depth_to_space.h

+//
+// Copyright (c) 2017 XiaoMi All rights reserved.
+//
+
+#ifndef MACE_OPS_DEPTH_TO_SPACE_H_
+#define MACE_OPS_DEPTH_TO_SPACE_H_
+
+#include <memory>
+#include <vector>
+
+#include "mace/core/operator.h"
+#include "mace/kernels/depth_to_space.h"
+
+namespace mace {
+namespace ops {
+
+template <DeviceType D, typename T>
+class DepthToSpaceOp : public Operator<D, T> {
+ public:
+  DepthToSpaceOp(const OperatorDef &op_def, Workspace *ws)
+      : Operator<D, T>(op_def, ws),
+        functor_(OperatorBase::GetRepeatedArgument<int>("crops", {0, 0, 0, 0}),
+                 OperatorBase::GetRepeatedArgument<int>("block_shape", {1, 1}),
+                 true) {}
+
+  bool Run(StatsFuture *future) override {
+    const Tensor *batch_tensor = this->Input(INPUT);
+    Tensor *space_tensor = this->Output(OUTPUT);
+
+    std::vector<index_t> output_shape(4, 0);
+    CalculateOutputShape(batch_tensor, space_tensor, output_shape.data());
+    functor_(space_tensor, output_shape, const_cast<Tensor *>(batch_tensor),
+             future);
+    return true;
+  }
+
+ private:
+  inline void CalculateOutputShape(const Tensor *input_tensor,
+                                   Tensor *output,
+                                   index_t *output_shape) {
+    auto crops = OperatorBase::GetRepeatedArgument<int>("crops", {0, 0, 0, 0});
+    auto block_shape =
+        OperatorBase::GetRepeatedArgument<int>("block_shape", {1, 1});
+    MACE_CHECK(input_tensor->dim_size() == 4, "Input's shape should be 4D");
+    MACE_CHECK(block_shape.size() == 2, "Block's shape should be 1D");
+    MACE_CHECK(crops.size() == 4, "Crops' shape should be 2D");
+
+    const index_t block_dims = block_shape.size();
+    index_t block_shape_product = 1;
+    for (uint32_t block_dim = 0; block_dim < block_dims; ++block_dim) {
+      MACE_CHECK(block_shape[block_dim] > 1,
+                 "block_shape's value should be great to 1");
+      const index_t block_shape_value = block_shape[block_dim];
+      const index_t cropped_input_size =
+          input_tensor->dim(block_dim + 1) * block_shape_value -
+          crops[block_dim * 2] - crops[block_dim * 2 + 1];
+      MACE_CHECK(cropped_input_size >= 0, "cropped size must be non-negative");
+      block_shape_product *= block_shape_value;
+      output_shape[block_dim + 1] = cropped_input_size;
+    }
+    output_shape[0] = input_tensor->dim(0) / block_shape_product;
+    output_shape[3] = input_tensor->dim(3);
+  }
+
+ private:
+  kernels::DepthToSpaceOpFunctor<D, T> functor_;
+
+ protected:
+  OP_INPUT_TAGS(INPUT);
+  OP_OUTPUT_TAGS(OUTPUT);
+};
+
+}  // namespace ops
+}  // namespace mace
+
+#endif  // MACE_OPS_DEPTH_TO_SPACE_H_