/* * Copyright (C) 2014 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef AudioHardwareListener_h #define AudioHardwareListener_h #include <wtf/Ref.h> #include <wtf/RefCounted.h> namespace WebCore { enum class AudioHardwareActivityType { Unknown, IsActive, IsInactive }; class AudioHardwareListener : public RefCounted<AudioHardwareListener> { public: class Client { public: virtual ~Client() { } virtual void audioHardwareDidBecomeActive() = 0; virtual void audioHardwareDidBecomeInactive() = 0; virtual void audioOutputDeviceChanged() = 0; }; WEBCORE_EXPORT static Ref<AudioHardwareListener> create(Client&); virtual ~AudioHardwareListener() { } AudioHardwareActivityType hardwareActivity() const { return m_activity; } bool outputDeviceSupportsLowPowerMode() const { return m_outputDeviceSupportsLowPowerMode; } protected: AudioHardwareListener(Client&); void setHardwareActivity(AudioHardwareActivityType activity) { m_activity = activity; } void setOutputDeviceSupportsLowPowerMode(bool support) { m_outputDeviceSupportsLowPowerMode = support; } Client& m_client; AudioHardwareActivityType m_activity; bool m_outputDeviceSupportsLowPowerMode; }; } #endif // AudioHardwareListener_h