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player_v1.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2004 The ScummVM project
 *
 * 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; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/scumm/player_v1.h,v 1.13 2004/01/06 12:45:30 fingolfin Exp $
 *
 */

#ifndef PLAYER_V1_H
#define PLAYER_V1_H

#include "scumm/player_v2.h"

namespace Scumm {

/**
 * Scumm V1 PC-Speaker player.
 */
00033 class Player_V1 : public Player_V2 {
public:
      Player_V1(ScummEngine *scumm, bool pcjr);
      ~Player_V1();

      virtual void startSound(int sound);
      virtual void stopSound(int sound);
      virtual void stopAllSounds();
      virtual int  getMusicTimer() const;

protected:
      virtual void nextTick();
      virtual void clear_channel(int i);
      virtual void chainSound(int nr, byte *data);

      virtual void generateSpkSamples(int16 *data, uint len);
      virtual void generatePCjrSamples(int16 *data, uint len);

      void restartSound();

      void set_mplex(uint mplex);
      void parseSpeakerChunk();
      void nextSpeakerCmd();
      void parsePCjrChunk();
      void nextPCjrCmd();

private:
      struct channel_data_v1 {
            uint freq;
            uint volume;
            byte *cmd_ptr;
            uint notelen;
            uint hull_counter;
            uint attack;
            uint decay;
            uint level;
            uint sustain_1;
            uint sustain_2;
            int  sustctr;
      };

      channel_data_v1 _channels[4];

      byte *_next_chunk;
      byte *_repeat_chunk;
      uint  _chunk_type;
      uint  _mplex_step;
      uint  _mplex;
      uint  _repeat_ctr;
      uint  _freq_current;
      int   _forced_level;
      uint16 _random_lsr;
      uint  *_value_ptr;
      uint  _time_left;
      uint  _start;
      uint  _end;
      int   _delta;
      uint  *_value_ptr_2;
      uint  _time_left_2;
      uint  _start_2;
      int   _delta_2;
};

} // End of namespace Scumm

#endif

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