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.
5 #ifndef MEDIA_AUDIO_MAC_AUDIO_MANAGER_MAC_H_
6 #define MEDIA_AUDIO_MAC_AUDIO_MANAGER_MAC_H_
8 #include <CoreAudio/AudioHardware.h>
11 #include "base/basictypes.h"
12 #include "base/compiler_specific.h"
13 #include "base/message_loop/message_loop_proxy.h"
14 #include "media/audio/audio_manager_base.h"
15 #include "media/audio/mac/aggregate_device_manager.h"
16 #include "media/audio/mac/audio_device_listener_mac.h"
20 // Mac OS X implementation of the AudioManager singleton. This class is internal
21 // to the audio output and only internal users can call methods not exposed by
22 // the AudioManager class.
23 class MEDIA_EXPORT AudioManagerMac : public AudioManagerBase {
27 // Implementation of AudioManager.
28 virtual bool HasAudioOutputDevices() OVERRIDE;
29 virtual bool HasAudioInputDevices() OVERRIDE;
30 virtual void GetAudioInputDeviceNames(
31 AudioDeviceNames* device_names) OVERRIDE;
32 virtual void GetAudioOutputDeviceNames(
33 AudioDeviceNames* device_names) OVERRIDE;
34 virtual AudioParameters GetInputStreamParameters(
35 const std::string& device_id) OVERRIDE;
36 virtual std::string GetAssociatedOutputDeviceID(
37 const std::string& input_device_id) OVERRIDE;
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, const std::string& device_id) OVERRIDE;
48 virtual AudioInputStream* MakeLowLatencyInputStream(
49 const AudioParameters& params, const std::string& device_id) OVERRIDE;
50 virtual std::string GetDefaultOutputDeviceID() OVERRIDE;
52 static bool GetDefaultInputDevice(AudioDeviceID* device);
53 static bool GetDefaultOutputDevice(AudioDeviceID* device);
54 static bool GetDefaultDevice(AudioDeviceID* device, bool input);
56 static bool GetDefaultOutputChannels(int* channels);
58 static bool GetDeviceChannels(AudioDeviceID device,
59 AudioObjectPropertyScope scope,
62 static int HardwareSampleRateForDevice(AudioDeviceID device_id);
63 static int HardwareSampleRate();
66 virtual ~AudioManagerMac();
68 virtual AudioParameters GetPreferredOutputStreamParameters(
69 const std::string& output_device_id,
70 const AudioParameters& input_params) OVERRIDE;
73 bool HasUnifiedDefaultIO();
75 // Helper methods for constructing AudioDeviceListenerMac on the audio thread.
76 void CreateDeviceListener();
77 void DestroyDeviceListener();
79 int ChooseBufferSize(int output_sample_rate);
81 // Notify streams of a device change if the default output device or its
82 // sample rate has changed, otherwise does nothing.
83 void HandleDeviceChanges();
85 scoped_ptr<AudioDeviceListenerMac> output_device_listener_;
87 // Track the output sample-rate and the default output device
88 // so we can intelligently handle device notifications only when necessary.
89 int current_sample_rate_;
90 AudioDeviceID current_output_device_;
92 AggregateDeviceManager aggregate_device_manager_;
94 DISALLOW_COPY_AND_ASSIGN(AudioManagerMac);
99 #endif // MEDIA_AUDIO_MAC_AUDIO_MANAGER_MAC_H_