69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/*
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* Copyright (C) 2025 Emeric Poupon
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*
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* This file is part of LMS.
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*
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* LMS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LMS. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "TranscodeService.hpp"
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#include "core/ILogger.hpp"
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#include "TranscodeResourceHandler.hpp"
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namespace lms::transcoding
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{
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namespace
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{
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std::size_t doEstimateContentLength(std::size_t bitrate, std::chrono::milliseconds duration)
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{
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const std::size_t estimatedContentLength{ static_cast<size_t>((bitrate / 8 * duration.count()) / 1000) };
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return estimatedContentLength;
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}
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} // namespace
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std::unique_ptr<ITranscodeService> createTranscodeService(db::IDb& db, core::IChildProcessManager& childProcessManager)
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{
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return std::make_unique<TranscodeService>(db, childProcessManager);
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}
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TranscodeService::TranscodeService(db::IDb& db, core::IChildProcessManager& childProcessManager)
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: _db{ db }
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, _childProcessManager(childProcessManager)
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{
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LMS_LOG(TRANSCODING, INFO, "Service started!");
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}
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TranscodeService::~TranscodeService()
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{
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LMS_LOG(TRANSCODING, INFO, "Service stopped!");
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}
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std::unique_ptr<core::IResourceHandler> TranscodeService::createTranscodeResourceHandler(const audio::TranscodeParameters& parameters, bool estimateContentLength)
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{
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std::optional<std::size_t> estimatedContentLength;
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if (estimateContentLength)
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{
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if (parameters.inputParameters.offset < parameters.inputParameters.audioProperties.duration)
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estimatedContentLength = doEstimateContentLength(*parameters.outputParameters.bitrate, parameters.inputParameters.audioProperties.duration - parameters.inputParameters.offset);
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else
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LMS_LOG(TRANSCODING, WARNING, "Offset " << parameters.inputParameters.offset << " is greater than audio file duration " << parameters.inputParameters.audioProperties.duration << ": not estimating content length");
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}
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return std::make_unique<transcoding::ResourceHandler>(parameters, estimatedContentLength);
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}
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} // namespace lms::transcoding
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