1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MEDIA_AUDIO_AUDIO_SOURCE_DIVERTER_H_ 6 #define MEDIA_AUDIO_AUDIO_SOURCE_DIVERTER_H_ 7 8 #include "media/base/media_export.h" 9 10 // Audio sources may optionally implement AudioSourceDiverter to temporarily 11 // divert audio data to an alternate AudioOutputStream. This allows the audio 12 // data to be plumbed to an alternate consumer; for example, a loopback 13 // mechanism for audio mirroring. 14 15 namespace media { 16 17 class AudioOutputStream; 18 class AudioParameters; 19 20 class MEDIA_EXPORT AudioSourceDiverter { 21 public: 22 // Returns the audio parameters of the divertable audio data. 23 virtual const AudioParameters& GetAudioParameters() = 0; 24 25 // Start providing audio data to the given |to_stream|, which is in an 26 // unopened state. |to_stream| remains under the control of the 27 // AudioSourceDiverter. 28 virtual void StartDiverting(AudioOutputStream* to_stream) = 0; 29 30 // Stops diverting audio data to the stream. The AudioSourceDiverter is 31 // responsible for making sure the stream is closed, perhaps asynchronously. 32 virtual void StopDiverting() = 0; 33 34 protected: ~AudioSourceDiverter()35 virtual ~AudioSourceDiverter() {} 36 }; 37 38 } // namespace media 39 40 #endif // MEDIA_AUDIO_AUDIO_SOURCE_DIVERTER_H_ 41