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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef AUDIO_DEVICE_AUDIO_MIXER_MANAGER_ALSA_LINUX_H_
#define AUDIO_DEVICE_AUDIO_MIXER_MANAGER_ALSA_LINUX_H_
#include <alsa/asoundlib.h>
#include "modules/audio_device/include/audio_device.h"
#include "modules/audio_device/linux/alsasymboltable_linux.h"
#include "rtc_base/synchronization/mutex.h"
namespace webrtc {
class AudioMixerManagerLinuxALSA {
public:
int32_t OpenSpeaker(char* deviceName) RTC_LOCKS_EXCLUDED(mutex_);
int32_t OpenMicrophone(char* deviceName) RTC_LOCKS_EXCLUDED(mutex_);
int32_t SetSpeakerVolume(uint32_t volume) RTC_LOCKS_EXCLUDED(mutex_);
int32_t SpeakerVolume(uint32_t& volume) const;
int32_t MaxSpeakerVolume(uint32_t& maxVolume) const;
int32_t MinSpeakerVolume(uint32_t& minVolume) const;
int32_t SpeakerVolumeIsAvailable(bool& available);
int32_t SpeakerMuteIsAvailable(bool& available);
int32_t SetSpeakerMute(bool enable) RTC_LOCKS_EXCLUDED(mutex_);
int32_t SpeakerMute(bool& enabled) const;
int32_t MicrophoneMuteIsAvailable(bool& available);
int32_t SetMicrophoneMute(bool enable) RTC_LOCKS_EXCLUDED(mutex_);
int32_t MicrophoneMute(bool& enabled) const;
int32_t MicrophoneVolumeIsAvailable(bool& available);
int32_t SetMicrophoneVolume(uint32_t volume) RTC_LOCKS_EXCLUDED(mutex_);
int32_t MicrophoneVolume(uint32_t& volume) const;
int32_t MaxMicrophoneVolume(uint32_t& maxVolume) const;
int32_t MinMicrophoneVolume(uint32_t& minVolume) const;
int32_t Close() RTC_LOCKS_EXCLUDED(mutex_);
int32_t CloseSpeaker() RTC_LOCKS_EXCLUDED(mutex_);
int32_t CloseMicrophone() RTC_LOCKS_EXCLUDED(mutex_);
bool SpeakerIsInitialized() const;
bool MicrophoneIsInitialized() const;
public:
AudioMixerManagerLinuxALSA();
~AudioMixerManagerLinuxALSA();
private:
int32_t CloseSpeakerLocked() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
int32_t CloseMicrophoneLocked() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
int32_t LoadMicMixerElement() const;
int32_t LoadSpeakerMixerElement() const;
void GetControlName(char* controlName, char* deviceName) const;
private:
Mutex mutex_;
mutable snd_mixer_t* _outputMixerHandle;
char _outputMixerStr[kAdmMaxDeviceNameSize];
mutable snd_mixer_t* _inputMixerHandle;
char _inputMixerStr[kAdmMaxDeviceNameSize];
mutable snd_mixer_elem_t* _outputMixerElement;
mutable snd_mixer_elem_t* _inputMixerElement;
};
} // namespace webrtc
#endif // MODULES_AUDIO_DEVICE_MAIN_SOURCE_LINUX_AUDIO_MIXER_MANAGER_ALSA_LINUX_H_
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