Index: chromecast/public/media/cast_audio_output_device.h |
diff --git a/chromecast/public/media/cast_audio_output_device.h b/chromecast/public/media/cast_audio_output_device.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e5a325673c874e80d16c1dfc3180167e11e025ef |
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+++ b/chromecast/public/media/cast_audio_output_device.h |
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+// Copyright 2015 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef CHROMECAST_PUBLIC_CAST_AUDIO_OUTPUT_DEVICE_H_ |
+#define CHROMECAST_PUBLIC_CAST_AUDIO_OUTPUT_DEVICE_H_ |
+ |
+#include "cast_audio_output_stream.h" |
+ |
+namespace chromecast { |
+ |
+class TaskRunner; |
+ |
+namespace media { |
+ |
+// This is an interface used to provide platform-specific audio streams. |
+// Implementations of this interface should survive for the duration of the |
+// process. |
+ |
+// Note: This interface should be implemented by third parties seeking to |
+// provide an audio manager platform for Cast. CastAudioManager will call |
+// this interface. |
+ |
+class CastAudioOutputDevice { |
+ public: |
+ virtual ~CastAudioOutputDevice() {} |
+ |
+ // Returns the maximum number of output streams allowed. |
+ virtual int GetMaximumOutputStreamsAllowed() = 0; |
+ |
+ // Returns the preferred output stream parameters. The caller may inject |
+ // |suggested| parameters, but it is left to the implementation to decide |
+ // which of these to return. |
+ virtual AudioParameters GetPreferredOutputStreamParameters( |
+ const AudioParameters& suggested) = 0; |
+ |
+ // Creates the output stream with parameters described by |params|. The stream |
+ // should be created on the thread on which this is called. Caller does not |
+ // take ownership of the returned stream. All callbacks to |
+ // CastAudioOutputStream::AudioSourceCallback objects should be made on the |
+ // thread to which |task_runner| belongs. |
+ virtual CastAudioOutputStream* MakeOutputStream(const AudioParameters& params, |
+ TaskRunner* task_runner) = 0; |
+}; |
+ |
+} // namespace media |
+} // namespace chromecast |
+ |
+#endif // CHROMECAST_PUBLIC_CAST_AUDIO_OUTPUT_DEVICE_H_ |