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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_LINUX_AUDIO_MANAGER_LINUX_H_
#define MEDIA_AUDIO_LINUX_AUDIO_MANAGER_LINUX_H_
#include <string>
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/threading/thread.h"
#include "media/audio/audio_manager_base.h"
namespace media {
class AlsaWrapper;
class MEDIA_EXPORT AudioManagerLinux : public AudioManagerBase {
public:
AudioManagerLinux();
static void ShowLinuxAudioInputSettings();
// Implementation of AudioManager.
virtual bool HasAudioOutputDevices() OVERRIDE;
virtual bool HasAudioInputDevices() OVERRIDE;
virtual void ShowAudioInputSettings() OVERRIDE;
virtual void GetAudioInputDeviceNames(media::AudioDeviceNames* device_names)
OVERRIDE;
virtual AudioParameters GetInputStreamParameters(
const std::string& device_id) OVERRIDE;
// Implementation of AudioManagerBase.
virtual AudioOutputStream* MakeLinearOutputStream(
const AudioParameters& params) OVERRIDE;
virtual AudioOutputStream* MakeLowLatencyOutputStream(
const AudioParameters& params,
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;
protected:
virtual ~AudioManagerLinux();
virtual AudioParameters GetPreferredOutputStreamParameters(
const AudioParameters& input_params) OVERRIDE;
private:
enum StreamType {
kStreamPlayback = 0,
kStreamCapture,
};
// Gets a list of available ALSA input devices.
void GetAlsaAudioInputDevices(media::AudioDeviceNames* device_names);
// Gets the ALSA devices' names and ids.
void GetAlsaDevicesInfo(void** hint, media::AudioDeviceNames* device_names);
// Checks if the specific ALSA device is available.
bool IsAlsaDeviceAvailable(const char* device_name);
// Returns true if a device is present for the given stream type.
bool HasAnyAlsaAudioDevice(StreamType stream);
// Called by MakeLinearOutputStream and MakeLowLatencyOutputStream.
AudioOutputStream* MakeOutputStream(const AudioParameters& params);
// Called by MakeLinearInputStream and MakeLowLatencyInputStream.
AudioInputStream* MakeInputStream(const AudioParameters& params,
const std::string& device_id);
scoped_ptr<AlsaWrapper> wrapper_;
DISALLOW_COPY_AND_ASSIGN(AudioManagerLinux);
};
} // namespace media
#endif // MEDIA_AUDIO_LINUX_AUDIO_MANAGER_LINUX_H_
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