Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/audaspace/include/devices/ThreadedDevice.h

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+/*******************************************************************************
+ * Copyright 2009-2016 Jörg Müller
+ *
+ * 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.
+ ******************************************************************************/
+
+#pragma once
+
+/**
+ * @file ThreadedDevice.h
+ * @ingroup plugin
+ * The ThreadedDevice class.
+ */
+
+#include "devices/SoftwareDevice.h"
+
+#include <thread>
+
+AUD_NAMESPACE_BEGIN
+
+/**
+ * This device extends the SoftwareDevice with code for running mixing in a separate thread.
+ */
+class AUD_PLUGIN_API ThreadedDevice : public SoftwareDevice
+{
+private:
+	/**
+	 * Whether there is currently playback.
+	 */
+	bool m_playing;
+
+	/**
+	 * Whether the current playback should stop.
+	 */
+	bool m_stop;
+
+	/**
+	 * The streaming thread.
+	 */
+	std::thread m_thread;
+
+	/**
+	 * Starts the streaming thread.
+	 */
+	AUD_LOCAL void start();
+
+	/**
+	 * Streaming thread main function.
+	 */
+	AUD_LOCAL virtual void runMixingThread()=0;
+
+	// delete copy constructor and operator=
+	ThreadedDevice(const ThreadedDevice&) = delete;
+	ThreadedDevice& operator=(const ThreadedDevice&) = delete;
+
+protected:
+	virtual void playing(bool playing);
+
+	/**
+	 * Empty default constructor. To setup the device call the function create()
+	 * and to uninitialize call destroy().
+	 */
+	ThreadedDevice();
+
+	/**
+	 * Indicates that the mixing thread should be stopped.
+	 * \return Whether the mixing thread should be stopping.
+	 * \warning For thread safety, the device needs to be locked, when this method is called.
+	 */
+	inline bool shouldStop() { return m_stop; }
+
+	/**
+	 * This method needs to be called when the mixing thread is stopping.
+	 * \warning For thread safety, the device needs to be locked, when this method is called.
+	 */
+	inline void doStop() { m_stop = m_playing = false; }
+
+	/**
+	 * Stops all playback and notifies the mixing thread to stop.
+	 * \warning The device has to be unlocked to not run into a deadlock.
+	 */
+	void stopMixingThread();
+};
+
+AUD_NAMESPACE_END