SDLPAL/adplug/player.cpp

/*
 * Adplug - Replayer for many OPL2/OPL3 audio file formats.
 * Copyright (C) 1999 - 2007 Simon Peter, <dn.tlp@gmx.net>, et al.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * player.cpp - Replayer base class, by Simon Peter <dn.tlp@gmx.net>
 */

#include "player.h"
#include "opl.h"

/***** CPlayer *****/

const unsigned short CPlayer::note_table[12] =
   {363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, 686};

const unsigned char CPlayer::op_table[9] =
   {0x00, 0x01, 0x02, 0x08, 0x09, 0x0a, 0x10, 0x11, 0x12};

CPlayer::CPlayer(Copl *newopl)
      : opl(newopl) {
}

CPlayer::~CPlayer() {
}

unsigned long CPlayer::songlength(int subsong) {
   Copl    tempopl;
   Copl   *saveopl = opl;
   float   slength = 0.0f;

   // save original OPL from being overwritten
   opl = &tempopl;

   // get song length
   rewind(subsong);
   while (update() && slength < 600000)	// song length limit: 10 minutes
      slength += 1000.0f / getrefresh();
   rewind(subsong);

   // restore original OPL and return
   opl = saveopl;
   return (unsigned long)slength;
}

void CPlayer::seek(unsigned long ms) {
   float pos = 0.0f;

   rewind();
   while (pos < ms && update())		// seek to new position
      pos += 1000/getrefresh();
}