media/audio/android/audio_manager_android.h

   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
  16 namespace media {
  17
  18 class OpenSLESOutputStream;
  19
  20 // Android implemention of AudioManager.
  21 class 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_