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 "media/audio/audio_manager_base.h"
  14
  15 namespace media {
  16
  17 class OpenSLESOutputStream;
  18
  19 // Android implemention of AudioManager.
  20 class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
  21  public:
  22   AudioManagerAndroid(AudioLogFactory* audio_log_factory);
  23
  24   // Implementation of AudioManager.
  25   virtual bool HasAudioOutputDevices() OVERRIDE;
  26   virtual bool HasAudioInputDevices() OVERRIDE;
  27   virtual void GetAudioInputDeviceNames(
  28       AudioDeviceNames* device_names) OVERRIDE;
  29   virtual void GetAudioOutputDeviceNames(
  30       AudioDeviceNames* device_names) OVERRIDE;
  31   virtual AudioParameters GetInputStreamParameters(
  32       const std::string& device_id) OVERRIDE;
  33
  34   virtual AudioOutputStream* MakeAudioOutputStream(
  35       const AudioParameters& params,
  36       const std::string& device_id) OVERRIDE;
  37   virtual AudioInputStream* MakeAudioInputStream(
  38       const AudioParameters& params,
  39       const std::string& device_id) OVERRIDE;
  40   virtual void ReleaseOutputStream(AudioOutputStream* stream) OVERRIDE;
  41   virtual void ReleaseInputStream(AudioInputStream* stream) OVERRIDE;
  42
  43   // Implementation of AudioManagerBase.
  44   virtual AudioOutputStream* MakeLinearOutputStream(
  45       const AudioParameters& params) OVERRIDE;
  46   virtual AudioOutputStream* MakeLowLatencyOutputStream(
  47       const AudioParameters& params,
  48       const std::string& device_id) OVERRIDE;
  49   virtual AudioInputStream* MakeLinearInputStream(
  50       const AudioParameters& params,
  51       const std::string& device_id) OVERRIDE;
  52   virtual AudioInputStream* MakeLowLatencyInputStream(
  53       const AudioParameters& params,
  54       const std::string& device_id) OVERRIDE;
  55
  56   static bool RegisterAudioManager(JNIEnv* env);
  57
  58   void SetMute(JNIEnv* env, jobject obj, jboolean muted);
  59
  60  protected:
  61   virtual ~AudioManagerAndroid();
  62
  63   virtual AudioParameters GetPreferredOutputStreamParameters(
  64       const std::string& output_device_id,
  65       const AudioParameters& input_params) OVERRIDE;
  66
  67  private:
  68   bool HadNoAudioStreams();
  69   void Init();
  70   void Close();
  71   void SetCommunicationAudioModeOn(bool on);
  72   bool SetAudioDevice(const std::string& device_id);
  73   int GetNativeOutputSampleRate();
  74   bool IsAudioLowLatencySupported();
  75   int GetAudioLowLatencyOutputFrameSize();
  76   int GetOptimalOutputFrameSize(int sample_rate, int channels);
  77
  78   void DoSetMuteOnAudioThread(bool muted);
  79
  80   // Allow the AudioAndroidTest to access private methods.
  81   FRIEND_TEST_ALL_PREFIXES(AudioAndroidOutputTest, IsAudioLowLatencySupported);
  82
  83   // Java AudioManager instance.
  84   base::android::ScopedJavaGlobalRef<jobject> j_audio_manager_;
  85
  86   typedef std::set<OpenSLESOutputStream*> OutputStreams;
  87   OutputStreams streams_;
  88   // TODO(wjia): remove this lock once unit test modules are fixed to call
  89   // AudioManager::MakeAudioOutputStream on the audio thread. For now, this
  90   // lock is used to guard access to |streams_|.
  91   base::Lock streams_lock_;
  92
  93   DISALLOW_COPY_AND_ASSIGN(AudioManagerAndroid);
  94 };
  95
  96 }  // namespace media
  97
  98 #endif  // MEDIA_AUDIO_ANDROID_AUDIO_MANAGER_ANDROID_H_