voiceman.h

/*  voiceman.h - The VoiceManager class handles a set of voices for synths
    This file is part of LibKMid 0.9.5
    Copyright (C) 1997,98,99,2000  Antonio Larrosa Jimenez
    LibKMid's homepage : http://www.arrakis.es/~rlarrosa/libtdemid.html
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    This library 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
    Library General Public License for more details.
 
    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.                                                  
 
    Send comments and bug fixes to Antonio Larrosa <larrosa@kde.org>
 
***************************************************************************/
#ifndef _VOICEMAN_H
#define _VOICEMAN_H
 
class VoiceManager
{
  private:
    class VoiceManagerPrivate;
    VoiceManagerPrivate *d;
 
    int nvoices;
 
    struct voice
    {
      int     id;
      int   channel;
      int   note;
      int   used;
 
      struct voice *prev;
      struct voice *next;
    };
 
    voice *FirstVoice; 
 
    voice *LastVoice; 
 
    voice *LastnotusedVoice; 
 
    voice **VoiceList; 
 
    voice *searcher; 
 
    voice *searcher_aid; 
 
  public:
    VoiceManager(int totalvoices);
 
    ~VoiceManager();
 
    int allocateVoice(int chn,int key);
 
    void deallocateVoice(int id);
 
    void initSearch(void); 
 
    int search(int chn); 
    //returns -1 if channel chn is not currently used
    // Continue searching for more voices which
    // use the channel chn
 
    int search(int chn,int note);
 
    int channel(int v) {return VoiceList[v]->channel;}
 
    int note(int v) {return VoiceList[v]->note;}
 
    int used(int v) {return VoiceList[v]->used;}
 
    void clearLists(void);
};
 
#endif