portaudio/PlatformAudioOut.h

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//* -*- mode:C++; tab-width:4; c-basic-offset:4; indent-tabs-mode:nil -*- */
//    Name:       src/platforms/sdl/PlatformAudioOut.h
//    Purpose:    Contains platform-specific sound playing routines
//    Author:     Shane T. Mueller, Ph.D.
//    Copyright:  (c) 2003-2026 Shane T. Mueller <smueller@obereed.ned>
//    License:    GPL 2
//
//
//
//     This file is part of the PEBL project.
//
//    PEBL 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.
//
//    PEBL 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 PEBL; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#ifndef __PLATFORMAUDIOOUT_H__
#define __PLATFORMAUDIOOUT_H__
 
#include "../../devices/PAudioOut.h"
#include "portaudio.h"
  
struct AudioInfo{
    SDL_AudioSpec spec;
    Uint8   *audio;                     /* Pointer to wave data */
    Uint32   audiolen;          /* Length of wave data */
    int      audiopos;          /* Current play position */
    int      volume;           /* Relative volume. 0-100*/
};
  
class PlatformAudioOut: public PAudioOut
{
 public:
    PlatformAudioOut();
    PlatformAudioOut(const char * filename);
    ~PlatformAudioOut();
  
    bool LoadSoundFile(const char* filename);
 
    bool CreateSineWave(float freq, double length, int amplitude);
    bool CreateSquareWave(float freq, double length, int amplitude);
    bool CreateSawtoothWave(float freq, double length, int amplitude);
    bool CreateChirp();
 
    bool Play();
    bool PlayForeground();
    bool Stop();
    
    
    bool Initialize();
 
    void AddTrack(char * handle, AudioInfo track);
    void RemoveTrack(char* handle);
 
    Uint8 * MixTracks();
    
 
private:
  
 
    friend void PlayCallBack(void * dummy, Uint8 * stream, int len);
    
    bool mLoaded;               //This will be true when a file 
                                //has been loaded or a buffer has been
                                //generated.
    AudioInfo mWave;
};
 
 
#endif