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| 1 // Copyright 2017 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_SYSTEM_H_ |
| 6 #define MEDIA_AUDIO_AUDIO_SYSTEM_H_ |
| 7 |
| 8 #include "base/callback.h" |
| 9 #include "media/audio/audio_device_description.h" |
| 10 #include "media/base/audio_parameters.h" |
| 11 #include "media/base/media_export.h" |
| 12 |
| 13 namespace media { |
| 14 class AudioManager; |
| 15 |
| 16 // Work in progress: Provides asynchronous interface to AudioManager. All the |
| 17 // AudioManager clients will be switched to it, in preparation for moving |
| 18 // to Mojo audio service. |
| 19 class MEDIA_EXPORT AudioSystem { |
| 20 public: |
| 21 // Replies are asynchronously sent to the thread the call is issued on. |
| 22 using OnAudioParamsCallback = base::Callback<void(const AudioParameters&)>; |
| 23 |
| 24 virtual ~AudioSystem(){}; |
| 25 |
| 26 // Callback will receive invalid parameters if the device is not found. |
| 27 virtual void GetInputStreamParameters( |
| 28 const std::string& device_id, |
| 29 OnAudioParamsCallback on_params_cb) const = 0; |
| 30 |
| 31 // Must not be used for anything but stream creation. |
| 32 virtual AudioManager* GetAudioManager() const = 0; |
| 33 }; |
| 34 |
| 35 } // namespace media |
| 36 |
| 37 #endif // MEDIA_AUDIO_AUDIO_SYSTEM_H_ |
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