include/AudioAlsa.h

   1 /*
   2  * AudioAlsa.h - device-class that implements ALSA-PCM-output
   3  *
   4  * Copyright (c) 2004-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
   5  *
   6  * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public
  19  * License along with this program (see COPYING); if not, write to the
  20  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  * Boston, MA 02110-1301 USA.
  22  *
  23  */
  24
  25 #ifndef _AUDIO_ALSA_H
  26 #define _AUDIO_ALSA_H
  27
  28 #include "lmmsconfig.h"
  29
  30 #ifdef LMMS_HAVE_ALSA
  31
  32 // older ALSA-versions might require this
  33 #define ALSA_PCM_NEW_HW_PARAMS_API
  34
  35 #include <alsa/asoundlib.h>
  36
  37 #include "AudioBackend.h"
  38
  39
  40 class lcdSpinBox;
  41 class QComboBox;
  42
  43
  44 class AudioAlsa : public AudioBackend, public QThread
  45 {
  46 public:
  47         AudioAlsa( bool & _success_ful, AudioOutputContext * context );
  48         virtual ~AudioAlsa();
  49
  50         inline static QString name()
  51         {
  52                 return QT_TRANSLATE_NOOP( "setupWidget",
  53                         "ALSA (Advanced Linux Sound Architecture)" );
  54         }
  55
  56         static QString probeDevice();
  57
  58
  59         class setupWidget : public AudioBackend::setupWidget
  60         {
  61         public:
  62                 setupWidget( QWidget * _parent );
  63                 virtual ~setupWidget();
  64
  65                 virtual void saveSettings();
  66
  67         private:
  68                 QComboBox * m_device;
  69                 lcdSpinBox * m_channels;
  70
  71                 void poo(const QString & s)
  72                 {
  73                         printf("Got %s\n", qPrintable( s ) );
  74                 }
  75
  76         } ;
  77
  78
  79 private:
  80         virtual void startProcessing();
  81         virtual void stopProcessing();
  82         virtual void applyQualitySettings();
  83         virtual void run();
  84
  85         int setHWParams( const ch_cnt_t _channels, snd_pcm_access_t _access );
  86         int setSWParams();
  87         int handleError( int _err );
  88
  89
  90         snd_pcm_t * m_handle;
  91
  92         snd_pcm_uframes_t m_bufferSize;
  93         snd_pcm_uframes_t m_periodSize;
  94
  95         snd_pcm_hw_params_t * m_hwParams;
  96         snd_pcm_sw_params_t * m_swParams;
  97
  98         bool m_convertEndian;
  99
 100 } ;
 101
 102 #endif
 103
 104 #endif