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119 lines
3.9 KiB
C++
119 lines
3.9 KiB
C++
/*
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* Copyright (c) 1993-2022, NVIDIA CORPORATION. All rights reserved.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*/
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#ifndef ENTROPY_CALIBRATOR_H
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#define ENTROPY_CALIBRATOR_H
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#include "BatchStream.h"
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#include "NvInfer.h"
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//! \class EntropyCalibratorImpl
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//!
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//! \brief Implements common functionality for Entropy calibrators.
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//!
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template <typename TBatchStream> class EntropyCalibratorImpl {
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public:
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EntropyCalibratorImpl(TBatchStream stream, int firstBatch,
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std::string networkName, const char* inputBlobName,
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bool readCache = true)
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: mStream{stream},
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mCalibrationTableName("CalibrationTable" + networkName),
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mInputBlobName(inputBlobName), mReadCache(readCache) {
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nvinfer1::Dims dims = mStream.getDims();
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mInputCount = samplesCommon::volume(dims);
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CHECK(cudaMalloc(&mDeviceInput, mInputCount * sizeof(float)));
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mStream.reset(firstBatch);
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}
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virtual ~EntropyCalibratorImpl() { CHECK(cudaFree(mDeviceInput)); }
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int getBatchSize() const noexcept { return mStream.getBatchSize(); }
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bool getBatch(void* bindings[], const char* names[],
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int nbBindings) noexcept {
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if (!mStream.next()) {
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return false;
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}
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CHECK(cudaMemcpy(mDeviceInput, mStream.getBatch(),
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mInputCount * sizeof(float), cudaMemcpyHostToDevice));
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ASSERT(!strcmp(names[0], mInputBlobName));
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bindings[0] = mDeviceInput;
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return true;
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}
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const void* readCalibrationCache(size_t& length) noexcept {
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mCalibrationCache.clear();
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std::ifstream input(mCalibrationTableName, std::ios::binary);
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input >> std::noskipws;
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if (mReadCache && input.good()) {
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std::copy(std::istream_iterator<char>(input),
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std::istream_iterator<char>(),
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std::back_inserter(mCalibrationCache));
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}
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length = mCalibrationCache.size();
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return length ? mCalibrationCache.data() : nullptr;
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}
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void writeCalibrationCache(const void* cache, size_t length) noexcept {
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std::ofstream output(mCalibrationTableName, std::ios::binary);
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output.write(reinterpret_cast<const char*>(cache), length);
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}
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private:
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TBatchStream mStream;
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size_t mInputCount;
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std::string mCalibrationTableName;
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const char* mInputBlobName;
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bool mReadCache{true};
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void* mDeviceInput{nullptr};
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std::vector<char> mCalibrationCache;
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};
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//! \class Int8EntropyCalibrator2
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//!
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//! \brief Implements Entropy calibrator 2.
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//! CalibrationAlgoType is kENTROPY_CALIBRATION_2.
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//!
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template <typename TBatchStream>
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class Int8EntropyCalibrator2 : public IInt8EntropyCalibrator2 {
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public:
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Int8EntropyCalibrator2(TBatchStream stream, int firstBatch,
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const char* networkName, const char* inputBlobName,
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bool readCache = true)
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: mImpl(stream, firstBatch, networkName, inputBlobName, readCache) {}
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int getBatchSize() const noexcept override { return mImpl.getBatchSize(); }
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bool getBatch(void* bindings[], const char* names[],
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int nbBindings) noexcept override {
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return mImpl.getBatch(bindings, names, nbBindings);
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}
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const void* readCalibrationCache(size_t& length) noexcept override {
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return mImpl.readCalibrationCache(length);
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}
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void writeCalibrationCache(const void* cache,
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size_t length) noexcept override {
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mImpl.writeCalibrationCache(cache, length);
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}
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private:
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EntropyCalibratorImpl<TBatchStream> mImpl;
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};
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#endif // ENTROPY_CALIBRATOR_H
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