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