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/*
* AudioAlsa.h - device-class that implements ALSA-PCM-output
*
* Copyright (c) 2004-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
*
* This file is part of LMMS - https://lmms.io
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#ifndef AUDIO_ALSA_H
#define AUDIO_ALSA_H
#include "lmmsconfig.h"
#ifdef LMMS_HAVE_ALSA
// older ALSA-versions might require this
#define ALSA_PCM_NEW_HW_PARAMS_API
#include <alsa/asoundlib.h>
#include <QThread>
#include "AudioDevice.h"
class AudioAlsa : public AudioDevice, public QThread
{
// Public classes and enums
public:
/**
* @brief Contains the relevant information about available ALSA devices
*/
class DeviceInfo
{
public:
DeviceInfo(QString const & deviceName, QString const & deviceDescription) :
m_deviceName(deviceName),
m_deviceDescription(deviceDescription)
{}
~DeviceInfo() {}
QString const & getDeviceName() const { return m_deviceName; }
QString const & getDeviceDescription() const { return m_deviceDescription; }
private:
QString m_deviceName;
QString m_deviceDescription;
};
typedef std::vector<DeviceInfo> DeviceInfoCollection;
public:
AudioAlsa( bool & _success_ful, Mixer* mixer );
virtual ~AudioAlsa();
inline static QString name()
{
return QT_TRANSLATE_NOOP( "setupWidget",
"ALSA (Advanced Linux Sound Architecture)" );
}
static QString probeDevice();
static DeviceInfoCollection getAvailableDevices();
private:
virtual void startProcessing();
virtual void stopProcessing();
virtual void applyQualitySettings();
virtual void run();
int setHWParams( const ch_cnt_t _channels, snd_pcm_access_t _access );
int setSWParams();
int handleError( int _err );
snd_pcm_t * m_handle;
snd_pcm_uframes_t m_bufferSize;
snd_pcm_uframes_t m_periodSize;
snd_pcm_hw_params_t * m_hwParams;
snd_pcm_sw_params_t * m_swParams;
bool m_convertEndian;
} ;
#endif
#endif
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