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70 lines
2.1 KiB
70 lines
2.1 KiB
/* Copyright (c) 2016 Baidu, Inc. All Rights Reserve.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#include "CRFDecodingLayer.h"
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namespace paddle {
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REGISTER_LAYER(crf_decoding, CRFDecodingLayer);
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bool CRFDecodingLayer::init(const LayerMap& layerMap,
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const ParameterMap& parameterMap) {
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if (!CRFLayer::init(layerMap, parameterMap)) {
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return false;
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}
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crf_.reset(new LinearChainCRF(
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numClasses_, parameter_->getBuf(PARAMETER_VALUE)->getData(), nullptr));
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return true;
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}
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void CRFDecodingLayer::forward(PassType passType) {
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Layer::forward(passType);
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CHECK(!useGpu_) << "GPU is not supported";
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const Argument& output = getInput(0);
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CHECK(output.sequenceStartPositions);
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size_t batchSize = output.getBatchSize();
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size_t numSequences = output.sequenceStartPositions->getSize() - 1;
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IVector::resizeOrCreate(output_.ids, batchSize, useGpu_);
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const int* starts = output.sequenceStartPositions->getData(false);
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CHECK_EQ(starts[numSequences], (int)batchSize);
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for (size_t i = 0; i < numSequences; ++i) {
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crf_->decode(output.value->getData() + numClasses_ * starts[i],
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output_.ids->getData() + starts[i], starts[i + 1] - starts[i]);
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}
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if (inputLayers_.size() == 2) {
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const Argument& label = getInput(1);
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resizeOutput(batchSize, 1);
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CHECK(label.ids);
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real* error = output_.value->getData();
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int* ids = label.ids->getData();
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int* result = output_.ids->getData();
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for (size_t i = 0; i < batchSize; ++i) {
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error[i] = ids[i] == result[i] ? 0 : 1;
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}
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}
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}
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void CRFDecodingLayer::backward(const UpdateCallback& callback) {
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parameter_->incUpdate(callback);
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}
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} // namespace paddle
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