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Support grid_sample and affine_grid operator
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/* | ||
Copyright 2020 The OneFlow Authors. All rights reserved. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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#include "oneflow/core/framework/attr_map.h" | ||
#include "oneflow/core/framework/op_expr_grad_function.h" | ||
#include "oneflow/core/functional/functional.h" | ||
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namespace oneflow { | ||
namespace one { | ||
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struct AffineGridInterpState : public AutoGradCaptureState { | ||
Shape size; | ||
bool align_corners; | ||
bool requires_grad; | ||
}; | ||
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class AffineGrid : public OpExprGradFunction<AffineGridInterpState> { | ||
public: | ||
Maybe<void> Init(const OpExpr& op) override { | ||
const auto* fw_op_expr = dynamic_cast<const UserOpExpr*>(&op); | ||
CHECK_NOTNULL_OR_RETURN(fw_op_expr); | ||
base_attrs_ = MakeAttrMapFromUserOpConf(fw_op_expr->proto()); | ||
return Maybe<void>::Ok(); | ||
} | ||
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Maybe<void> Capture(AffineGridInterpState* ctx, const TensorTuple& inputs, | ||
const TensorTuple& outputs, const AttrMap& attrs) const override { | ||
CHECK_EQ_OR_RETURN(inputs.size(), 1); | ||
ctx->requires_grad = inputs.at(0)->requires_grad(); // theta | ||
if (!ctx->requires_grad) { return Maybe<void>::Ok(); } | ||
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ComposedAttrMap composed_attrs(attrs, base_attrs_); | ||
ctx->size = JUST(composed_attrs.GetAttr<Shape>("size")); | ||
ctx->align_corners = JUST(composed_attrs.GetAttr<bool>("align_corners")); | ||
return Maybe<void>::Ok(); | ||
} | ||
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Maybe<void> Apply(const AffineGridInterpState* ctx, const TensorTuple& out_grads, | ||
TensorTuple* in_grads) const override { | ||
CHECK_EQ_OR_RETURN(out_grads.size(), 1); | ||
in_grads->resize(1); | ||
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if (ctx->requires_grad) { | ||
in_grads->at(0) = | ||
JUST(functional::AffineGridGrad(out_grads.at(0), ctx->size, ctx->align_corners)); | ||
} | ||
return Maybe<void>::Ok(); | ||
} | ||
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private: | ||
AttrMap base_attrs_; | ||
}; | ||
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REGISTER_OP_EXPR_GRAD_FUNCTION("affine_grid", AffineGrid); | ||
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} // namespace one | ||
} // namespace oneflow |
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/* | ||
Copyright 2020 The OneFlow Authors. All rights reserved. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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#include "oneflow/core/framework/attr_map.h" | ||
#include "oneflow/core/framework/op_expr_grad_function.h" | ||
#include "oneflow/core/functional/functional.h" | ||
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namespace oneflow { | ||
namespace one { | ||
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struct GirdSampleInterpState : public AutoGradCaptureState { | ||
Shape size; | ||
std::string interpolation_mode; | ||
std::string padding_mode; | ||
bool align_corners; | ||
size_t input_index; | ||
size_t gird_index; | ||
bool input_requires_grad; | ||
bool gird_requires_grad; | ||
bool requires_grad; | ||
}; | ||
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class GirdSample : public OpExprGradFunction<GirdSampleInterpState> { | ||
public: | ||
Maybe<void> Init(const OpExpr& op) override { | ||
const auto* fw_op_expr = dynamic_cast<const UserOpExpr*>(&op); | ||
CHECK_NOTNULL_OR_RETURN(fw_op_expr); | ||
base_attrs_ = MakeAttrMapFromUserOpConf(fw_op_expr->proto()); | ||
return Maybe<void>::Ok(); | ||
} | ||
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Maybe<void> Capture(GirdSampleInterpState* ctx, const TensorTuple& inputs, | ||
const TensorTuple& outputs, const AttrMap& attrs) const override { | ||
CHECK_EQ_OR_RETURN(inputs.size(), 2); | ||
ctx->input_requires_grad = inputs.at(0)->requires_grad(); | ||
ctx->gird_requires_grad = inputs.at(1)->requires_grad(); | ||
ctx->requires_grad = ctx->input_requires_grad || ctx->gird_requires_grad; | ||
if (!ctx->requires_grad) { return Maybe<void>::Ok(); } | ||
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ctx->input_index = ctx->SaveTensorForBackward(inputs.at(0)); // input | ||
ctx->gird_index = ctx->SaveTensorForBackward(inputs.at(1)); // gird | ||
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ComposedAttrMap composed_attrs(attrs, base_attrs_); | ||
ctx->interpolation_mode = JUST(composed_attrs.GetAttr<std::string>("interpolation_mode")); | ||
ctx->padding_mode = JUST(composed_attrs.GetAttr<std::string>("padding_mode")); | ||
ctx->align_corners = JUST(composed_attrs.GetAttr<bool>("align_corners")); | ||
return Maybe<void>::Ok(); | ||
} | ||
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Maybe<void> Apply(const GirdSampleInterpState* ctx, const TensorTuple& out_grads, | ||
TensorTuple* in_grads) const override { | ||
CHECK_EQ_OR_RETURN(out_grads.size(), 1); | ||
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if (ctx->requires_grad) { | ||
const auto& input = ctx->SavedTensors().at(ctx->input_index); | ||
const auto& gird = ctx->SavedTensors().at(ctx->gird_index); | ||
const auto& results = | ||
JUST(functional::GridSampleGrad(out_grads.at(0), input, gird, ctx->interpolation_mode, | ||
ctx->padding_mode, ctx->align_corners)); | ||
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in_grads->resize(2); | ||
if (ctx->input_requires_grad) { in_grads->at(0) = results->at(0); } | ||
if (ctx->gird_requires_grad) { in_grads->at(1) = results->at(1); } | ||
} | ||
return Maybe<void>::Ok(); | ||
} | ||
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private: | ||
AttrMap base_attrs_; | ||
}; | ||
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REGISTER_OP_EXPR_GRAD_FUNCTION("grid_sample", GirdSample); | ||
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} // namespace one | ||
} // namespace oneflow |
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