add csrc code

csrc/fastdeploy/backends/tensorrt/common/EntropyCalibrator.h

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 1993-2022, NVIDIA CORPORATION. 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.
+ */
+
+#ifndef ENTROPY_CALIBRATOR_H
+#define ENTROPY_CALIBRATOR_H
+
+#include "BatchStream.h"
+#include "NvInfer.h"
+
+//! \class EntropyCalibratorImpl
+//!
+//! \brief Implements common functionality for Entropy calibrators.
+//!
+template <typename TBatchStream> class EntropyCalibratorImpl {
+ public:
+  EntropyCalibratorImpl(TBatchStream stream, int firstBatch,
+                        std::string networkName, const char* inputBlobName,
+                        bool readCache = true)
+      : mStream{stream},
+        mCalibrationTableName("CalibrationTable" + networkName),
+        mInputBlobName(inputBlobName), mReadCache(readCache) {
+    nvinfer1::Dims dims = mStream.getDims();
+    mInputCount = samplesCommon::volume(dims);
+    CHECK(cudaMalloc(&mDeviceInput, mInputCount * sizeof(float)));
+    mStream.reset(firstBatch);
+  }
+
+  virtual ~EntropyCalibratorImpl() { CHECK(cudaFree(mDeviceInput)); }
+
+  int getBatchSize() const noexcept { return mStream.getBatchSize(); }
+
+  bool getBatch(void* bindings[], const char* names[],
+                int nbBindings) noexcept {
+    if (!mStream.next()) {
+      return false;
+    }
+    CHECK(cudaMemcpy(mDeviceInput, mStream.getBatch(),
+                     mInputCount * sizeof(float), cudaMemcpyHostToDevice));
+    ASSERT(!strcmp(names[0], mInputBlobName));
+    bindings[0] = mDeviceInput;
+    return true;
+  }
+
+  const void* readCalibrationCache(size_t& length) noexcept {
+    mCalibrationCache.clear();
+    std::ifstream input(mCalibrationTableName, std::ios::binary);
+    input >> std::noskipws;
+    if (mReadCache && input.good()) {
+      std::copy(std::istream_iterator<char>(input),
+                std::istream_iterator<char>(),
+                std::back_inserter(mCalibrationCache));
+    }
+    length = mCalibrationCache.size();
+    return length ? mCalibrationCache.data() : nullptr;
+  }
+
+  void writeCalibrationCache(const void* cache, size_t length) noexcept {
+    std::ofstream output(mCalibrationTableName, std::ios::binary);
+    output.write(reinterpret_cast<const char*>(cache), length);
+  }
+
+ private:
+  TBatchStream mStream;
+  size_t mInputCount;
+  std::string mCalibrationTableName;
+  const char* mInputBlobName;
+  bool mReadCache{true};
+  void* mDeviceInput{nullptr};
+  std::vector<char> mCalibrationCache;
+};
+
+//! \class Int8EntropyCalibrator2
+//!
+//! \brief Implements Entropy calibrator 2.
+//!  CalibrationAlgoType is kENTROPY_CALIBRATION_2.
+//!
+template <typename TBatchStream>
+class Int8EntropyCalibrator2 : public IInt8EntropyCalibrator2 {
+ public:
+  Int8EntropyCalibrator2(TBatchStream stream, int firstBatch,
+                         const char* networkName, const char* inputBlobName,
+                         bool readCache = true)
+      : mImpl(stream, firstBatch, networkName, inputBlobName, readCache) {}
+
+  int getBatchSize() const noexcept override { return mImpl.getBatchSize(); }
+
+  bool getBatch(void* bindings[], const char* names[],
+                int nbBindings) noexcept override {
+    return mImpl.getBatch(bindings, names, nbBindings);
+  }
+
+  const void* readCalibrationCache(size_t& length) noexcept override {
+    return mImpl.readCalibrationCache(length);
+  }
+
+  void writeCalibrationCache(const void* cache,
+                             size_t length) noexcept override {
+    mImpl.writeCalibrationCache(cache, length);
+  }
+
+ private:
+  EntropyCalibratorImpl<TBatchStream> mImpl;
+};
+
+#endif // ENTROPY_CALIBRATOR_H