Scan for audio properties, metadata, and embedded images in one single pass. Removed now useless lmsmetadata library + reworked code accordingly

2025-11-02 16:23:10 +01:00
parent 8e554b258c
commit b25e3b9b1e
112 changed files with 4005 additions and 3379 deletions
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2025 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS 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.
+ *
+ * LMS 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 LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "TranscodeService.hpp"
+
+#include "audio/ITranscoder.hpp"
+#include "core/ILogger.hpp"
+#include "core/UUID.hpp"
+#include "database/IDb.hpp"
+#include "database/Session.hpp"
+
+#include "TranscodeResourceHandler.hpp"
+
+namespace lms::transcoding
+{
+    namespace
+    {
+        std::size_t doEstimateContentLength(std::size_t bitrate, std::chrono::milliseconds duration)
+        {
+            const std::size_t estimatedContentLength{ static_cast<size_t>((bitrate / 8 * duration.count()) / 1000) };
+            return estimatedContentLength;
+        }
+    } // namespace
+
+    std::unique_ptr<ITranscodeService> createTranscodeService(db::IDb& db, core::IChildProcessManager& childProcessManager)
+    {
+        return std::make_unique<TranscodeService>(db, childProcessManager);
+    }
+
+    TranscodeService::TranscodeService(db::IDb& db, core::IChildProcessManager& childProcessManager)
+        : _db{ db }
+        , _childProcessManager(childProcessManager)
+    {
+        LMS_LOG(TRANSCODING, INFO, "Service started!");
+    }
+
+    TranscodeService::~TranscodeService()
+    {
+        LMS_LOG(TRANSCODING, INFO, "Service stopped!");
+    }
+
+    std::unique_ptr<core::IResourceHandler> TranscodeService::createTranscodeResourceHandler(const audio::TranscodeParameters& parameters, bool estimateContentLength)
+    {
+        std::optional<std::size_t> estimatedContentLength;
+
+        if (estimateContentLength)
+        {
+            if (parameters.inputParameters.offset < parameters.inputParameters.duration)
+                estimatedContentLength = doEstimateContentLength(*parameters.outputParameters.bitrate, parameters.inputParameters.duration - parameters.inputParameters.offset);
+            else
+                LMS_LOG(TRANSCODING, WARNING, "Offset " << parameters.inputParameters.offset << " is greater than audio file duration " << parameters.inputParameters.duration << ": not estimating content length");
+        }
+
+        return std::make_unique<transcoding::ResourceHandler>(parameters, estimatedContentLength);
+    }
+} // namespace lms::transcoding