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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_
#define MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_
#include <string>
#include "media/audio/audio_manager_base.h"
namespace media {
class AudioDeviceListenerWin;
// Windows implementation of the AudioManager singleton. This class is internal
// to the audio output and only internal users can call methods not exposed by
// the AudioManager class.
class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase {
public:
AudioManagerWin();
// Implementation of AudioManager.
virtual bool HasAudioOutputDevices() OVERRIDE;
virtual bool HasAudioInputDevices() OVERRIDE;
virtual string16 GetAudioInputDeviceModel() OVERRIDE;
virtual void ShowAudioInputSettings() OVERRIDE;
virtual void GetAudioInputDeviceNames(
AudioDeviceNames* device_names) OVERRIDE;
virtual void GetAudioOutputDeviceNames(
AudioDeviceNames* device_names) OVERRIDE;
virtual AudioParameters GetInputStreamParameters(
const std::string& device_id) OVERRIDE;
virtual std::string GetAssociatedOutputDeviceID(
const std::string& input_device_id) OVERRIDE;
// Implementation of AudioManagerBase.
virtual AudioOutputStream* MakeLinearOutputStream(
const AudioParameters& params) OVERRIDE;
virtual AudioOutputStream* MakeLowLatencyOutputStream(
const AudioParameters& params,
const std::string& device_id,
const std::string& input_device_id) OVERRIDE;
virtual AudioInputStream* MakeLinearInputStream(
const AudioParameters& params, const std::string& device_id) OVERRIDE;
virtual AudioInputStream* MakeLowLatencyInputStream(
const AudioParameters& params, const std::string& device_id) OVERRIDE;
virtual std::string GetDefaultOutputDeviceID() OVERRIDE;
protected:
virtual ~AudioManagerWin();
virtual AudioParameters GetPreferredOutputStreamParameters(
const std::string& output_device_id,
const AudioParameters& input_params) OVERRIDE;
private:
enum EnumerationType {
kUninitializedEnumeration = 0,
kMMDeviceEnumeration,
kWaveEnumeration,
};
// Allow unit test to modify the utilized enumeration API.
friend class AudioManagerTest;
EnumerationType enumeration_type_;
EnumerationType enumeration_type() { return enumeration_type_; }
void SetEnumerationType(EnumerationType type) {
enumeration_type_ = type;
}
// Returns a PCMWaveInAudioInputStream instance or NULL on failure.
// This method converts MMDevice-style device ID to WaveIn-style device ID if
// necessary.
// (Please see device_enumeration_win.h for more info about the two kinds of
// device IDs.)
AudioInputStream* CreatePCMWaveInAudioInputStream(
const AudioParameters& params,
const std::string& device_id);
// Helper methods for constructing AudioDeviceListenerWin on the audio thread.
void CreateDeviceListener();
void DestroyDeviceListener();
void GetAudioDeviceNamesImpl(bool input, AudioDeviceNames* device_names);
// Listen for output device changes.
scoped_ptr<AudioDeviceListenerWin> output_device_listener_;
DISALLOW_COPY_AND_ASSIGN(AudioManagerWin);
};
} // namespace media
#endif // MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_
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