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 "base/android/jni_android.h"
   9 #include "base/gtest_prod_util.h"
  10 #include "media/audio/audio_manager_base.h"
  11
  12 namespace media {
  13
  14 // Android implemention of AudioManager.
  15 class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
  16  public:
  17   AudioManagerAndroid();
  18
  19   // Implementation of AudioManager.
  20   virtual bool HasAudioOutputDevices() OVERRIDE;
  21   virtual bool HasAudioInputDevices() OVERRIDE;
  22   virtual void GetAudioInputDeviceNames(
  23       AudioDeviceNames* device_names) OVERRIDE;
  24   virtual void GetAudioOutputDeviceNames(
  25       AudioDeviceNames* device_names) OVERRIDE;
  26   virtual AudioParameters GetInputStreamParameters(
  27       const std::string& device_id) OVERRIDE;
  28
  29   virtual AudioOutputStream* MakeAudioOutputStream(
  30       const AudioParameters& params,
  31       const std::string& device_id,
  32       const std::string& input_device_id) OVERRIDE;
  33   virtual AudioInputStream* MakeAudioInputStream(
  34       const AudioParameters& params,
  35       const std::string& device_id) OVERRIDE;
  36   virtual void ReleaseOutputStream(AudioOutputStream* stream) OVERRIDE;
  37   virtual void ReleaseInputStream(AudioInputStream* stream) OVERRIDE;
  38
  39   // Implementation of AudioManagerBase.
  40   virtual AudioOutputStream* MakeLinearOutputStream(
  41       const AudioParameters& params) OVERRIDE;
  42   virtual AudioOutputStream* MakeLowLatencyOutputStream(
  43       const AudioParameters& params,
  44       const std::string& device_id,
  45       const std::string& input_device_id) OVERRIDE;
  46   virtual AudioInputStream* MakeLinearInputStream(
  47       const AudioParameters& params,
  48       const std::string& device_id) OVERRIDE;
  49   virtual AudioInputStream* MakeLowLatencyInputStream(
  50       const AudioParameters& params,
  51       const std::string& device_id) OVERRIDE;
  52
  53   static bool RegisterAudioManager(JNIEnv* env);
  54
  55  protected:
  56   virtual ~AudioManagerAndroid();
  57
  58   virtual AudioParameters GetPreferredOutputStreamParameters(
  59       const std::string& output_device_id,
  60       const AudioParameters& input_params) OVERRIDE;
  61
  62  private:
  63   void SetAudioMode(int mode);
  64   void RegisterHeadsetReceiver();
  65   void UnregisterHeadsetReceiver();
  66   int GetNativeOutputSampleRate();
  67   bool IsAudioLowLatencySupported();
  68   int GetAudioLowLatencyOutputFrameSize();
  69   int GetOptimalOutputFrameSize(int sample_rate, int channels);
  70
  71   // Allow the AudioAndroidTest to access private methods.
  72   FRIEND_TEST_ALL_PREFIXES(AudioAndroidTest, IsAudioLowLatencySupported);
  73
  74   // Java AudioManager instance.
  75   base::android::ScopedJavaGlobalRef<jobject> j_audio_manager_;
  76
  77   DISALLOW_COPY_AND_ASSIGN(AudioManagerAndroid);
  78 };
  79
  80 }  // namespace media
  81
  82 #endif  // MEDIA_AUDIO_ANDROID_AUDIO_MANAGER_ANDROID_H_