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diff --git a/extern/audaspace/include/devices/IDeviceFactory.h b/extern/audaspace/include/devices/IDeviceFactory.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 IDeviceFactory.h
+ * @ingroup devices
+ * The IDeviceFactory interface.
+ */
+
+#include "respec/Specification.h"
+
+#include <memory>
+
+AUD_NAMESPACE_BEGIN
+
+/**
+ * @interface IDeviceFactory
+ * The IDeviceFactory interface opens an output device.
+ */
+class AUD_API IDeviceFactory
+{
+public:
+	/**
+	 * Opens an audio device for playback.
+	 * \exception Exception Thrown if the audio device cannot be opened.
+	 */
+	virtual std::shared_ptr<IDevice> openDevice()=0;
+
+	/**
+	 * Returns the priority of the device to be the default device for a system.
+	 * The higher the priority the more likely it is for this device to be used as the default device.
+	 * \return Priority to be the default device.
+	 */
+	virtual int getPriority()=0;
+
+	/**
+	 * Sets the wanted device specifications for opening the device.
+	 * \param specs The wanted audio specification.
+	 */
+	virtual void setSpecs(DeviceSpecs specs)=0;
+
+	/**
+	 * Sets the size for the internal playback buffers.
+	 * The bigger the buffersize, the less likely clicks happen,
+	 * but the latency increases too.
+	 * \param buffersize The size of the internal buffer.
+	 */
+	virtual void setBufferSize(int buffersize)=0;
+
+	/**
+	 * Sets a name for the device.
+	 * \param name The internal name for the device.
+	 */
+	virtual void setName(std::string name)=0;
+};
+
+AUD_NAMESPACE_END