audio_manager_android.h revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
1// Copyright (c) 2012 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_ANDROID_AUDIO_MANAGER_ANDROID_H_
6#define MEDIA_AUDIO_ANDROID_AUDIO_MANAGER_ANDROID_H_
7
8#include <set>
9
10#include "base/android/jni_android.h"
11#include "base/gtest_prod_util.h"
12#include "base/synchronization/lock.h"
13#include "base/synchronization/waitable_event.h"
14#include "media/audio/audio_manager_base.h"
15
16namespace media {
17
18class OpenSLESOutputStream;
19
20// Android implemention of AudioManager.
21class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
22 public:
23  AudioManagerAndroid(AudioLogFactory* audio_log_factory);
24
25  // Implementation of AudioManager.
26  virtual bool HasAudioOutputDevices() OVERRIDE;
27  virtual bool HasAudioInputDevices() OVERRIDE;
28  virtual void GetAudioInputDeviceNames(
29      AudioDeviceNames* device_names) OVERRIDE;
30  virtual void GetAudioOutputDeviceNames(
31      AudioDeviceNames* device_names) OVERRIDE;
32  virtual AudioParameters GetInputStreamParameters(
33      const std::string& device_id) OVERRIDE;
34
35  virtual AudioOutputStream* MakeAudioOutputStream(
36      const AudioParameters& params,
37      const std::string& device_id) OVERRIDE;
38  virtual AudioInputStream* MakeAudioInputStream(
39      const AudioParameters& params,
40      const std::string& device_id) OVERRIDE;
41  virtual void ReleaseOutputStream(AudioOutputStream* stream) OVERRIDE;
42  virtual void ReleaseInputStream(AudioInputStream* stream) OVERRIDE;
43
44  // Implementation of AudioManagerBase.
45  virtual AudioOutputStream* MakeLinearOutputStream(
46      const AudioParameters& params) OVERRIDE;
47  virtual AudioOutputStream* MakeLowLatencyOutputStream(
48      const AudioParameters& params,
49      const std::string& device_id) OVERRIDE;
50  virtual AudioInputStream* MakeLinearInputStream(
51      const AudioParameters& params,
52      const std::string& device_id) OVERRIDE;
53  virtual AudioInputStream* MakeLowLatencyInputStream(
54      const AudioParameters& params,
55      const std::string& device_id) OVERRIDE;
56
57  static bool RegisterAudioManager(JNIEnv* env);
58
59  void SetMute(JNIEnv* env, jobject obj, jboolean muted);
60
61 protected:
62  virtual ~AudioManagerAndroid();
63
64  virtual AudioParameters GetPreferredOutputStreamParameters(
65      const std::string& output_device_id,
66      const AudioParameters& input_params) OVERRIDE;
67
68 private:
69  void InitializeOnAudioThread();
70  void ShutdownOnAudioThread();
71
72  bool HasNoAudioInputStreams();
73  void SetCommunicationAudioModeOn(bool on);
74  bool SetAudioDevice(const std::string& device_id);
75  int GetNativeOutputSampleRate();
76  bool IsAudioLowLatencySupported();
77  int GetAudioLowLatencyOutputFrameSize();
78  int GetOptimalOutputFrameSize(int sample_rate, int channels);
79
80  void DoSetMuteOnAudioThread(bool muted);
81
82  // Java AudioManager instance.
83  base::android::ScopedJavaGlobalRef<jobject> j_audio_manager_;
84
85  typedef std::set<OpenSLESOutputStream*> OutputStreams;
86  OutputStreams streams_;
87
88  // Enabled when first input stream is created and set to false when last
89  // input stream is destroyed. Also affects the stream type of output streams.
90  bool communication_mode_is_on_;
91
92  DISALLOW_COPY_AND_ASSIGN(AudioManagerAndroid);
93};
94
95}  // namespace media
96
97#endif  // MEDIA_AUDIO_ANDROID_AUDIO_MANAGER_ANDROID_H_
98