musix 0.3.5

Music player library for esoteric audio formats (music from C64,Amiga etc)
Documentation 
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/*
 * Adplug - Replayer for many OPL2/OPL3 audio file formats.
 * Copyright (C) 1999 - 2003 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * [xad] HYP player, by Riven the Mage <riven@ok.ru>
 */

/*
    - discovery -

  file(s) : HT-EF2.COM, HT-EF3.COM
     type : Eiserne Front BBStro
     tune : by Shadowdancer [Hypnosis]
   player : by (?)Hetero [LKCC/SAC]
*/

#include "hyp.h"
#include "debug.h"

const unsigned char CxadhypPlayer::hyp_adlib_registers[99] =
{
  0x20, 0x23, 0x40, 0x43, 0x60, 0x63, 0x80, 0x83, 0xA0, 0xB0, 0xC0,
  0x21, 0x24, 0x41, 0x44, 0x61, 0x64, 0x81, 0x84, 0xA1, 0xB1, 0xC1,
  0x22, 0x25, 0x42, 0x45, 0x62, 0x65, 0x82, 0x85, 0xA2, 0xB2, 0xC2,
  0x28, 0x2B, 0x48, 0x4B, 0x68, 0x6B, 0x88, 0x8B, 0xA3, 0xB3, 0xC3,
  0x29, 0x2C, 0x49, 0x4C, 0x69, 0x6C, 0x89, 0x8C, 0xA4, 0xB4, 0xC4,
  0x2A, 0x2D, 0x4A, 0x4D, 0x6A, 0x6D, 0x8A, 0x8D, 0xA5, 0xB5, 0xC5,
  0x30, 0x33, 0x50, 0x53, 0x70, 0x73, 0x90, 0x93, 0xA6, 0xB6, 0xC6,
  0x31, 0x34, 0x51, 0x54, 0x71, 0x74, 0x91, 0x94, 0xA7, 0xB7, 0xC7,
  0x32, 0x35, 0x52, 0x55, 0x72, 0x75, 0x92, 0x95, 0xA8, 0xB8, 0xC8
};

const unsigned short CxadhypPlayer::hyp_notes[73] =
{
  0x0000, // by riven
  0x0956, 0x096B, 0x0980, 0x0998, 0x09B1, 0x09C9, 0x09E5, 0x0A03, 0x0A21,
  0x0A41, 0x0A63, 0x0A86, 0x0D56, 0x0D6B, 0x0D80, 0x0D98, 0x0DB1, 0x0DC9,
  0x0DE5, 0x0E03, 0x0E21, 0x0E41, 0x0E63, 0x0E86, 0x1156, 0x116B, 0x1180,
  0x1198, 0x11B1, 0x11C9, 0x11E5, 0x1203, 0x1221, 0x1241, 0x1263, 0x1286,
  0x1556, 0x156B, 0x1580, 0x1598, 0x15B1, 0x15C9, 0x15E5, 0x1603, 0x1621,
  0x1641, 0x1663, 0x1686, 0x1956, 0x196B, 0x1980, 0x1998, 0x19B1, 0x19C9,
  0x19E5, 0x1A03, 0x1A21, 0x1A41, 0x1A63, 0x1A86, 0x1D56, 0x1D6B, 0x1D80,
  0x1D98, 0x1DB1, 0x1DC9, 0x1DE5, 0x1E03, 0x1E21, 0x1E41, 0x1E63, 0x1E86
};

CPlayer *CxadhypPlayer::factory(Copl *newopl)
{
  return new CxadhypPlayer(newopl);
}

void CxadhypPlayer::xadplayer_rewind(int subsong)
{
  int i;

  plr.speed = tune[5];

  opl_write(0xBD,0xC0);

  for(i=0; i<9; i++)
    adlib[0xB0+i] = 0;

  // define instruments
  for(i=0; i<99; i++)
    opl_write(hyp_adlib_registers[i], tune[6+i]);

  hyp.pointer = 0x69;
}

void CxadhypPlayer::xadplayer_update()
{
  for(int i=0; i<9; i++)
  {
    unsigned char event = tune[hyp.pointer++];

    if (event)
    {
      unsigned short freq = hyp_notes[event & 0x3F];

      unsigned char lofreq = (freq & 0xFF);
      unsigned char hifreq = (freq >> 8);

      opl_write(0xB0+i, adlib[0xB0+i]);

      if (!(event & 0x40))
      {
        opl_write(0xA0+i, lofreq);
        opl_write(0xB0+i, hifreq | 0x20);
      }

      adlib[0xB0+i] &= 0xDF;
    }
  }

  hyp.pointer += 3;

  if (hyp.pointer >= tune_size)
  {
    hyp.pointer = 0x69;
    plr.looping = 1;
  }
}

float CxadhypPlayer::xadplayer_getrefresh()
{
  return 60.0f;
}

std::string CxadhypPlayer::xadplayer_gettype()
{
  return std::string("xad: hypnosis player");
}