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74 lines
2.7 KiB
C++
74 lines
2.7 KiB
C++
#ifndef H5WRITER_H
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#define H5WRITER_H
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#include <unordered_map>
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#include <memory>
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#include <vector>
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#include <H5Cpp.h>
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#include <chrono>
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#include "date.h"
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class H5Writer
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{
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protected:
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// Initialized in constructor.
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const std::string filename;
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hsize_t frames_per_file;
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hsize_t initial_dataset_size;
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hsize_t dataset_increase_step = 0;
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// State variables.
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hsize_t max_data_index = 0;
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hsize_t current_frame_chunk = 0;
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H5::H5File file;
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std::unordered_map<std::string, H5::DataSet> datasets;
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std::unordered_map<std::string, hsize_t> datasets_current_size;
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hsize_t prepare_storage_for_data(const std::string& dataset_name, const size_t data_index, const std::vector<size_t>& data_shape,
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const std::string& data_type, const std::string& endianness);
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void create_dataset(const std::string& dataset_name, const std::vector<size_t>& data_shape,
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const std::string& data_type, const std::string& endianness, bool chunked, hsize_t dataset_size);
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size_t get_relative_data_index(const size_t data_index);
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public:
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H5Writer(const std::string& filename, hsize_t frames_per_file=0, hsize_t initial_dataset_size=1000, hsize_t dataset_increase_step=1000);
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virtual ~H5Writer();
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virtual bool is_file_open() const;
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virtual void create_file(const hsize_t frame_chunk=1);
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virtual void close_file();
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virtual void write_data(const std::string& dataset_name, const size_t data_index, const char* data, const std::vector<size_t>& data_shape,
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const size_t data_bytes_size, const std::string& data_type, const std::string& endianness);
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virtual H5::H5File& get_h5_file();
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virtual bool is_data_for_current_file(const size_t data_index);
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};
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class DummyH5Writer : public H5Writer
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{
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public:
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DummyH5Writer() : H5Writer("/dev/null", 0, 0, 0) {}
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bool is_file_open() const override
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{ return false; }
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void create_file(const hsize_t frame_chunk=1) override {}
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void close_file() override {}
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void write_data(const std::string& dataset_name, const size_t data_index, const char* data, const std::vector<size_t>& data_shape,
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const size_t data_bytes_size, const std::string& data_type, const std::string& endianness) override {}
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H5::H5File& get_h5_file() override;
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bool is_data_for_current_file(const size_t data_index) override
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{ return true; }
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};
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std::unique_ptr<H5Writer> get_h5_writer(const std::string& filename, hsize_t frames_per_file=0,
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hsize_t initial_dataset_size=1000, hsize_t dataset_increase_step=1000);
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#endif
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