1 /* 2 * Copyright 2016 The WebRTC Project Authors. All rights reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef SDK_OBJC_NATIVE_SRC_AUDIO_AUDIO_SESSION_OBSERVER_H_ 12 #define SDK_OBJC_NATIVE_SRC_AUDIO_AUDIO_SESSION_OBSERVER_H_ 13 14 #include "rtc_base/thread.h" 15 16 namespace webrtc { 17 18 // Observer interface for listening to AVAudioSession events. 19 class AudioSessionObserver { 20 public: 21 // Called when audio session interruption begins. 22 virtual void OnInterruptionBegin() = 0; 23 24 // Called when audio session interruption ends. 25 virtual void OnInterruptionEnd() = 0; 26 27 // Called when audio route changes. 28 virtual void OnValidRouteChange() = 0; 29 30 // Called when the ability to play or record changes. 31 virtual void OnCanPlayOrRecordChange(bool can_play_or_record) = 0; 32 33 virtual void OnChangedOutputVolume() = 0; 34 35 protected: ~AudioSessionObserver()36 virtual ~AudioSessionObserver() {} 37 }; 38 39 } // namespace webrtc 40 41 #endif // SDK_OBJC_NATIVE_SRC_AUDIO_AUDIO_SESSION_OBSERVER_H_ 42