AudioSdl.h

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/*
 * AudioSdl.h - device-class that performs PCM-output via SDL
 *
 * 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 LMMS_AUDIO_SDL_H
#define LMMS_AUDIO_SDL_H
 
#include "lmmsconfig.h"
 
#ifdef LMMS_HAVE_SDL
 
#include <SDL2/SDL_audio.h>
 
#include "AudioDevice.h"
#include "AudioDeviceSetupWidget.h"
 
class QComboBox;
 
namespace lmms
{
 
class AudioSdl : public AudioDevice
{
public:
        AudioSdl( bool & _success_ful, AudioEngine* audioEngine );
        ~AudioSdl() override;
 
        inline static QString name()
        {
                return QT_TRANSLATE_NOOP( "AudioDeviceSetupWidget",
                                        "SDL (Simple DirectMedia Layer)" );
        }
 
 
        class setupWidget : public gui::AudioDeviceSetupWidget
        {
        public:
                setupWidget( QWidget * _parent );
                ~setupWidget() override = default;
 
                void saveSettings() override;
        
        private:
                void populatePlaybackDeviceComboBox();
                void populateInputDeviceComboBox();
 
        private:
                QComboBox* m_playbackDeviceComboBox = nullptr;
                QComboBox* m_inputDeviceComboBox = nullptr;
 
                static QString s_systemDefaultDevice;
        } ;
 
 
private:
        void startProcessing() override;
        void stopProcessing() override;
 
        static void sdlAudioCallback( void * _udata, Uint8 * _buf, int _len );
        void sdlAudioCallback( Uint8 * _buf, int _len );
 
        static void sdlInputAudioCallback( void * _udata, Uint8 * _buf, int _len );
        void sdlInputAudioCallback( Uint8 * _buf, int _len );
 
        SDL_AudioSpec m_audioHandle;
 
        SampleFrame* m_outBuf;
 
        size_t m_currentBufferFramePos;
        size_t m_currentBufferFramesCount;
 
        bool m_stopped;
 
        SDL_AudioDeviceID m_outputDevice;
 
        SDL_AudioSpec m_inputAudioHandle;
        SDL_AudioDeviceID m_inputDevice;
} ;
 
 
} // namespace lmms
 
#endif // LMMS_HAVE_SDL
 
#endif // LMMS_AUDIO_SDL_H