include/AudioSdl.h

   1 /*
   2  * AudioSdl.h - device-class that performs PCM-output via SDL
   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_SDL_H
  26 #define _AUDIO_SDL_H
  27
  28 #include "lmmsconfig.h"
  29
  30 #ifdef LMMS_HAVE_SDL
  31
  32 #include <SDL/SDL.h>
  33 #include <SDL/SDL_audio.h>
  34
  35 #include "AudioDevice.h"
  36
  37 class QLineEdit;
  38
  39
  40 class AudioSdl : public AudioDevice
  41 {
  42 public:
  43         AudioSdl( bool & _success_ful, mixer * _mixer );
  44         virtual ~AudioSdl();
  45
  46         inline static QString name()
  47         {
  48                 return QT_TRANSLATE_NOOP( "setupWidget",
  49                                         "SDL (Simple DirectMedia Layer)" );
  50         }
  51
  52
  53         class setupWidget : public AudioDevice::setupWidget
  54         {
  55         public:
  56                 setupWidget( QWidget * _parent );
  57                 virtual ~setupWidget();
  58
  59                 virtual void saveSettings();
  60
  61         private:
  62                 QLineEdit * m_device;
  63
  64         } ;
  65
  66
  67 private:
  68         virtual void startProcessing();
  69         virtual void stopProcessing();
  70         virtual void applyQualitySettings();
  71
  72         static void sdlAudioCallback( void * _udata, Uint8 * _buf, int _len );
  73         void sdlAudioCallback( Uint8 * _buf, int _len );
  74
  75         SDL_AudioSpec m_audioHandle;
  76
  77         surroundSampleFrame * m_outBuf;
  78         Uint8 * m_convertedBuf;
  79         int m_convertedBufPos;
  80         int m_convertedBufSize;
  81
  82         bool m_convertEndian;
  83
  84         volatile bool m_stopped;
  85         QSemaphore m_stopSemaphore;
  86
  87 } ;
  88
  89 #endif
  90
  91 #endif