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/*
* Copyright (c) 2012 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_DEVICE_ALSA_LINUX_H_
#define AUDIO_DEVICE_AUDIO_DEVICE_ALSA_LINUX_H_
#include <memory>
#include "modules/audio_device/audio_device_generic.h"
#include "modules/audio_device/linux/audio_mixer_manager_alsa_linux.h"
#include "rtc_base/platform_thread.h"
#include "rtc_base/synchronization/mutex.h"
#if defined(WEBRTC_USE_X11)
#include <X11/Xlib.h>
#endif
#include <alsa/asoundlib.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
typedef webrtc::adm_linux_alsa::AlsaSymbolTable WebRTCAlsaSymbolTable;
WebRTCAlsaSymbolTable* GetAlsaSymbolTable();
namespace webrtc {
class AudioDeviceLinuxALSA : public AudioDeviceGeneric {
public:
AudioDeviceLinuxALSA();
virtual ~AudioDeviceLinuxALSA();
// Retrieve the currently utilized audio layer
int32_t ActiveAudioLayer(
AudioDeviceModule::AudioLayer& audioLayer) const override;
// Main initializaton and termination
InitStatus Init() RTC_LOCKS_EXCLUDED(mutex_) override;
int32_t Terminate() RTC_LOCKS_EXCLUDED(mutex_) override;
bool Initialized() const override;
// Device enumeration
int16_t PlayoutDevices() override;
int16_t RecordingDevices() override;
int32_t PlayoutDeviceName(uint16_t index,
char name[kAdmMaxDeviceNameSize],
char guid[kAdmMaxGuidSize]) override;
int32_t RecordingDeviceName(uint16_t index,
char name[kAdmMaxDeviceNameSize],
char guid[kAdmMaxGuidSize]) override;
// Device selection
int32_t SetPlayoutDevice(uint16_t index) override;
int32_t SetPlayoutDevice(
AudioDeviceModule::WindowsDeviceType device) override;
int32_t SetRecordingDevice(uint16_t index) override;
int32_t SetRecordingDevice(
AudioDeviceModule::WindowsDeviceType device) override;
// Audio transport initialization
int32_t PlayoutIsAvailable(bool& available) override;
int32_t InitPlayout() RTC_LOCKS_EXCLUDED(mutex_) override;
bool PlayoutIsInitialized() const override;
int32_t RecordingIsAvailable(bool& available) override;
int32_t InitRecording() RTC_LOCKS_EXCLUDED(mutex_) override;
bool RecordingIsInitialized() const override;
// Audio transport control
int32_t StartPlayout() override;
int32_t StopPlayout() RTC_LOCKS_EXCLUDED(mutex_) override;
bool Playing() const override;
int32_t StartRecording() override;
int32_t StopRecording() RTC_LOCKS_EXCLUDED(mutex_) override;
bool Recording() const override;
// Audio mixer initialization
int32_t InitSpeaker() RTC_LOCKS_EXCLUDED(mutex_) override;
bool SpeakerIsInitialized() const override;
int32_t InitMicrophone() RTC_LOCKS_EXCLUDED(mutex_) override;
bool MicrophoneIsInitialized() const override;
// Speaker volume controls
int32_t SpeakerVolumeIsAvailable(bool& available) override;
int32_t SetSpeakerVolume(uint32_t volume) override;
int32_t SpeakerVolume(uint32_t& volume) const override;
int32_t MaxSpeakerVolume(uint32_t& maxVolume) const override;
int32_t MinSpeakerVolume(uint32_t& minVolume) const override;
// Microphone volume controls
int32_t MicrophoneVolumeIsAvailable(bool& available) override;
int32_t SetMicrophoneVolume(uint32_t volume) override;
int32_t MicrophoneVolume(uint32_t& volume) const override;
int32_t MaxMicrophoneVolume(uint32_t& maxVolume) const override;
int32_t MinMicrophoneVolume(uint32_t& minVolume) const override;
// Speaker mute control
int32_t SpeakerMuteIsAvailable(bool& available) override;
int32_t SetSpeakerMute(bool enable) override;
int32_t SpeakerMute(bool& enabled) const override;
// Microphone mute control
int32_t MicrophoneMuteIsAvailable(bool& available) override;
int32_t SetMicrophoneMute(bool enable) override;
int32_t MicrophoneMute(bool& enabled) const override;
// Stereo support
int32_t StereoPlayoutIsAvailable(bool& available)
RTC_LOCKS_EXCLUDED(mutex_) override;
int32_t SetStereoPlayout(bool enable) override;
int32_t StereoPlayout(bool& enabled) const override;
int32_t StereoRecordingIsAvailable(bool& available)
RTC_LOCKS_EXCLUDED(mutex_) override;
int32_t SetStereoRecording(bool enable) override;
int32_t StereoRecording(bool& enabled) const override;
// Delay information and control
int32_t PlayoutDelay(uint16_t& delayMS) const override;
void AttachAudioBuffer(AudioDeviceBuffer* audioBuffer)
RTC_LOCKS_EXCLUDED(mutex_) override;
private:
int32_t InitRecordingLocked() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
int32_t StopRecordingLocked() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
int32_t StopPlayoutLocked() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
int32_t InitPlayoutLocked() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
int32_t InitSpeakerLocked() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
int32_t InitMicrophoneLocked() RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_);
int32_t GetDevicesInfo(int32_t function,
bool playback,
int32_t enumDeviceNo = 0,
char* enumDeviceName = NULL,
int32_t ednLen = 0) const;
int32_t ErrorRecovery(int32_t error, snd_pcm_t* deviceHandle);
bool KeyPressed() const;
void Lock() RTC_EXCLUSIVE_LOCK_FUNCTION(mutex_) { mutex_.Lock(); }
void UnLock() RTC_UNLOCK_FUNCTION(mutex_) { mutex_.Unlock(); }
inline int32_t InputSanityCheckAfterUnlockedPeriod() const;
inline int32_t OutputSanityCheckAfterUnlockedPeriod() const;
static void RecThreadFunc(void*);
static void PlayThreadFunc(void*);
bool RecThreadProcess();
bool PlayThreadProcess();
AudioDeviceBuffer* _ptrAudioBuffer;
Mutex mutex_;
webrtc::PlatformThread _ptrThreadRec;
webrtc::PlatformThread _ptrThreadPlay;
AudioMixerManagerLinuxALSA _mixerManager;
uint16_t _inputDeviceIndex;
uint16_t _outputDeviceIndex;
bool _inputDeviceIsSpecified;
bool _outputDeviceIsSpecified;
snd_pcm_t* _handleRecord;
snd_pcm_t* _handlePlayout;
snd_pcm_uframes_t _recordingBuffersizeInFrame;
snd_pcm_uframes_t _recordingPeriodSizeInFrame;
snd_pcm_uframes_t _playoutBufferSizeInFrame;
snd_pcm_uframes_t _playoutPeriodSizeInFrame;
ssize_t _recordingBufferSizeIn10MS;
ssize_t _playoutBufferSizeIn10MS;
uint32_t _recordingFramesIn10MS;
uint32_t _playoutFramesIn10MS;
uint32_t _recordingFreq;
uint32_t _playoutFreq;
uint8_t _recChannels;
uint8_t _playChannels;
int8_t* _recordingBuffer; // in byte
int8_t* _playoutBuffer; // in byte
uint32_t _recordingFramesLeft;
uint32_t _playoutFramesLeft;
bool _initialized;
bool _recording;
bool _playing;
bool _recIsInitialized;
bool _playIsInitialized;
snd_pcm_sframes_t _recordingDelay;
snd_pcm_sframes_t _playoutDelay;
char _oldKeyState[32];
#if defined(WEBRTC_USE_X11)
Display* _XDisplay;
#endif
};
} // namespace webrtc
#endif // MODULES_AUDIO_DEVICE_MAIN_SOURCE_LINUX_AUDIO_DEVICE_ALSA_LINUX_H_
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