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Work on creating a new data source structure
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/* This file is part of YUView - The YUV player with advanced analytics toolset | ||
* <https://github.com/IENT/YUView> | ||
* Copyright (C) 2015 Institut für Nachrichtentechnik, RWTH Aachen University, GERMANY | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation; either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* In addition, as a special exception, the copyright holders give | ||
* permission to link the code of portions of this program with the | ||
* OpenSSL library under certain conditions as described in each | ||
* individual source file, and distribute linked combinations including | ||
* the two. | ||
* | ||
* You must obey the GNU General Public License in all respects for all | ||
* of the code used other than OpenSSL. If you modify file(s) with this | ||
* exception, you may extend this exception to your version of the | ||
* file(s), but you are not obligated to do so. If you do not wish to do | ||
* so, delete this exception statement from your version. If you delete | ||
* this exception statement from all source files in the program, then | ||
* also delete it here. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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#include "DataSourceLocalFile.h" | ||
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DataSourceLocalFile::DataSourceLocalFile(const std::filesystem::path &filePath) | ||
{ | ||
this->file.open(filePath.string(), std::ios_base::in | std::ios_base::binary); | ||
} | ||
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std::vector<InfoItem> DataSourceLocalFile::getInfoList() const | ||
{ | ||
if (!this->isReady()) | ||
return {}; | ||
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std::vector<InfoItem> infoList; | ||
infoList.push_back( | ||
InfoItem({"File path", this->filePath.string(), "The absolute path of the local file"})); | ||
if (const auto size = this->fileSize()) | ||
infoList.push_back(InfoItem({"File Size", std::to_string(*size)})); | ||
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return infoList; | ||
} | ||
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bool DataSourceLocalFile::atEnd() const | ||
{ | ||
return this->file.eof(); | ||
} | ||
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bool DataSourceLocalFile::isReady() const | ||
{ | ||
return !this->file.fail(); | ||
} | ||
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std::int64_t DataSourceLocalFile::position() const | ||
{ | ||
return this->filePosition; | ||
} | ||
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std::optional<std::int64_t> DataSourceLocalFile::fileSize() const | ||
{ | ||
if (!this->isFileOpened) | ||
return {}; | ||
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const auto size = std::filesystem::file_size(this->filePath); | ||
return static_cast<std::int64_t>(size); | ||
} | ||
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bool DataSourceLocalFile::seek(const std::int64_t pos) | ||
{ | ||
if (!this->isReady()) | ||
return false; | ||
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this->file.seekg(static_cast<std::streampos>(pos)); | ||
return this->isReady(); | ||
} | ||
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std::int64_t DataSourceLocalFile::read(ByteVector &buffer, const std::int64_t nrBytes) | ||
{ | ||
if (!this->isReady()) | ||
return 0; | ||
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const auto usize = static_cast<size_t>(nrBytes); | ||
if (buffer.size() < nrBytes) | ||
buffer.resize(usize); | ||
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this->file.read(reinterpret_cast<char *>(buffer.data()), usize); | ||
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const auto bytesRead = this->file.gcount(); | ||
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this->filePosition += bytesRead; | ||
return static_cast<std::int64_t>(bytesRead); | ||
} |
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/* This file is part of YUView - The YUV player with advanced analytics toolset | ||
* <https://github.com/IENT/YUView> | ||
* Copyright (C) 2015 Institut für Nachrichtentechnik, RWTH Aachen University, GERMANY | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation; either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* In addition, as a special exception, the copyright holders give | ||
* permission to link the code of portions of this program with the | ||
* OpenSSL library under certain conditions as described in each | ||
* individual source file, and distribute linked combinations including | ||
* the two. | ||
* | ||
* You must obey the GNU General Public License in all respects for all | ||
* of the code used other than OpenSSL. If you modify file(s) with this | ||
* exception, you may extend this exception to your version of the | ||
* file(s), but you are not obligated to do so. If you do not wish to do | ||
* so, delete this exception statement from your version. If you delete | ||
* this exception statement from all source files in the program, then | ||
* also delete it here. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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#pragma once | ||
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#include "IDataSource.h" | ||
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#include <filesystem> | ||
#include <fstream> | ||
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class DataSourceLocalFile : public IDataSource | ||
{ | ||
public: | ||
DataSourceLocalFile(const std::filesystem::path &filePath); | ||
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virtual [[nodiscard]] std::vector<InfoItem> getInfoList() const override; | ||
virtual [[nodiscard]] bool atEnd() const override; | ||
virtual [[nodiscard]] bool isReady() const override; | ||
virtual [[nodiscard]] std::int64_t position() const override; | ||
virtual [[nodiscard]] std::optional<std::int64_t> fileSize() const; | ||
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virtual [[nodiscard]] bool seek(const std::int64_t pos) override; | ||
virtual [[nodiscard]] std::int64_t read(ByteVector &buffer, const std::int64_t nrBytes) override; | ||
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protected: | ||
std::filesystem::path filePath{}; | ||
bool isFileOpened{}; | ||
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std::ifstream file{}; | ||
std::int64_t filePosition{}; | ||
}; |
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