mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-11 03:34:13 +00:00
436 lines
9.5 KiB
C++
436 lines
9.5 KiB
C++
/* ScummVM - Scumm Interpreter
|
||
* Copyright (C) 2006 The ScummVM project
|
||
* Original ADL-Player source Copyright (C) 2004 by Dorian Gray
|
||
*
|
||
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||
*
|
||
* $Header$
|
||
*
|
||
*/
|
||
|
||
#include "gob/music.h"
|
||
#include "gob/gob.h"
|
||
#include "gob/game.h"
|
||
|
||
namespace Gob {
|
||
|
||
const char *Music::_tracks[][2] = {
|
||
{"avt00.tot", "mine"},
|
||
{"avt001.tot", "nuit"},
|
||
{"avt002.tot", "campagne"},
|
||
{"avt003.tot", "extsor1"},
|
||
{"avt004.tot", "interieure"},
|
||
{"avt005.tot", "zombie"},
|
||
{"avt006.tot", "zombie"},
|
||
{"avt007.tot", "campagne"},
|
||
{"avt008.tot", "campagne"},
|
||
{"avt009.tot", "extsor1"},
|
||
{"avt010.tot", "extsor1"},
|
||
{"avt011.tot", "interieure"},
|
||
{"avt012.tot", "zombie"},
|
||
{"avt014.tot", "nuit"},
|
||
{"avt015.tot", "interieure"},
|
||
{"avt016.tot", "statue"},
|
||
{"avt017.tot", "zombie"},
|
||
{"avt018.tot", "statue"},
|
||
{"avt019.tot", "mine"},
|
||
{"avt020.tot", "statue"},
|
||
{"avt021.tot", "mine"},
|
||
{"avt022.tot", "zombie"}
|
||
};
|
||
|
||
const char *Music::_tracksToFiles[][2] = {
|
||
{"campagne", "Musmac2.adl"},
|
||
{"extsor1", "Musmac3.adl"},
|
||
{"interieure", "Musmac4.adl"},
|
||
{"mine", "Musmac5.adl"},
|
||
{"nuit", "Musmac6.adl"},
|
||
{"statue", "Musmac2.adl"},
|
||
{"zombie", "Musmac3.adl"}
|
||
};
|
||
|
||
const unsigned char Music::_operators[] = {0, 1, 2, 8, 9, 10, 16, 17, 18};
|
||
const unsigned char Music::_volRegNums[] = {
|
||
3, 4, 5,
|
||
11, 12, 13,
|
||
19, 20, 21
|
||
};
|
||
|
||
Music::Music(GobEngine *vm) : _vm(vm) {
|
||
_data = 0;
|
||
_playPos = 0;
|
||
_dataSize = 0;
|
||
_rate = _vm->_mixer->getOutputRate();
|
||
_opl = makeAdlibOPL(_rate);
|
||
_vm->_mixer->setupPremix(this, Audio::Mixer::kMusicSoundType);
|
||
_first = true;
|
||
_ended = false;
|
||
_playing = false;
|
||
_looping = true;
|
||
_samplesTillPoll = 0;
|
||
|
||
setFreqs();
|
||
}
|
||
|
||
Music::~Music(void) {
|
||
if (_data);
|
||
delete _data;
|
||
_vm->_mixer->setupPremix(0);
|
||
}
|
||
|
||
void Music::premixerCall(int16 *buf, uint len) {
|
||
if (!_playing) {
|
||
memset(buf, 0, 2 * len * sizeof(int16));
|
||
return;
|
||
}
|
||
else {
|
||
if (_first) {
|
||
memset(buf, 0, 2 * len * sizeof(int16));
|
||
pollMusic();
|
||
return;
|
||
}
|
||
else {
|
||
uint32 render;
|
||
int16 *data = buf;
|
||
uint datalen = len;
|
||
while (datalen) {
|
||
if (_samplesTillPoll) {
|
||
render = (datalen > _samplesTillPoll) ? (_samplesTillPoll) : (datalen);
|
||
datalen -= render;
|
||
_samplesTillPoll -= render;
|
||
YM3812UpdateOne(_opl, data, render);
|
||
data += render;
|
||
} else {
|
||
pollMusic();
|
||
if (_ended) {
|
||
memset(data, 0, datalen * sizeof(int16));
|
||
datalen = 0;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if (_ended) {
|
||
_first = true;
|
||
_ended = false;
|
||
_playPos = _data + 3 + (_data[1] + 1) * 0x38;
|
||
_samplesTillPoll = 0;
|
||
if (_looping) {
|
||
reset();
|
||
setVoices();
|
||
}
|
||
else
|
||
_playing = false;
|
||
}
|
||
// Convert mono data to stereo
|
||
for (int i = (len - 1); i >= 0; i--) {
|
||
buf[2 * i] = buf[2 * i + 1] = buf[i];
|
||
}
|
||
}
|
||
}
|
||
|
||
void Music::writeOPL(byte reg, byte val) {
|
||
debug(5, "writeOPL(%02X, %02X)", reg, val);
|
||
OPLWriteReg(_opl, reg, val);
|
||
}
|
||
|
||
void Music::setFreqs(void) {
|
||
byte lin;
|
||
byte col;
|
||
long val = 0;
|
||
|
||
// Run through the 11 channels
|
||
for (lin = 0; lin < 11; lin ++) {
|
||
_notes[lin] = 0;
|
||
_notCol[lin] = 0;
|
||
_notLin[lin] = 0;
|
||
_notOn[lin] = false;
|
||
}
|
||
|
||
// Run through the 25 lines
|
||
for (lin = 0; lin < 25; lin ++) {
|
||
// Run through the 12 columns
|
||
for (col = 0; col < 12; col ++) {
|
||
if (!col)
|
||
val = (((0x2710L + lin * 0x18) * 0xCB78 / 0x3D090) << 0xE) * 9 / 0x1B503;
|
||
_freqs[lin][col] = (short)((val + 4) >> 3);
|
||
val = val * 0x6A / 0x64;
|
||
// val = val * 392 / 370;
|
||
}
|
||
}
|
||
}
|
||
|
||
void Music::reset() {
|
||
// Set frequencies and octave to 0; notes off
|
||
for (int i = 0; i < 9; i++) {
|
||
writeOPL(0xA0 | i, 0);
|
||
writeOPL(0xB0 | i, 0);
|
||
writeOPL(0xE0 | _operators[i] , 0);
|
||
writeOPL(0xE0 | _operators[i] + 3, 0);
|
||
}
|
||
|
||
// Authorize the control of the waveformes
|
||
writeOPL(0x01, 0x20);
|
||
}
|
||
|
||
void Music::setVoices() {
|
||
// Definitions of the 9 instruments
|
||
for (int i = 0; i < 9; i++)
|
||
setVoice(i, i, true);
|
||
}
|
||
|
||
void Music::setVoice(byte voice, byte instr, bool set) {
|
||
unsigned short *strct;
|
||
byte channel;
|
||
|
||
// i = 0 : 0 1 2 3 4 5 6 7 8 9 10 11 12 26
|
||
// i = 1 : 13 14 15 16 17 18 19 20 21 22 23 24 25 27
|
||
for (int i = 0; i < 2; i++) {
|
||
strct = (unsigned short*)(_data + 3 + instr * 0x38 + i * 0x1A);
|
||
channel = _operators[voice] + i * 3;
|
||
writeOPL(0xBD, 0x00);
|
||
writeOPL(0x08, 0x00);
|
||
writeOPL(0x40 | channel, ((strct[0] & 3) << 6) | (strct[8] & 0x3F));
|
||
if (!i)
|
||
writeOPL(0xC0 | voice , ((strct[2] & 7) << 1) | (1 - (strct[12] & 1)));
|
||
writeOPL(0x60 | channel, ((strct[3] & 0xF) << 4) | (strct[6] & 0xF));
|
||
writeOPL(0x80 | channel, ((strct[4] & 0xF) << 4) | (strct[7] & 0xF));
|
||
writeOPL(0x20 | channel, ((strct[9] & 1) << 7) |
|
||
((strct[10] & 1) << 6) | ((strct[5] & 1) << 5) |
|
||
((strct[11] & 1) << 4) | (strct[1] & 0xF));
|
||
if (!i)
|
||
writeOPL(0xE0 | channel, (strct[26] & 3));
|
||
else
|
||
writeOPL(0xE0 | channel, (strct[14] & 3));
|
||
if (i && set)
|
||
writeOPL(0x40 | channel, 0);
|
||
}
|
||
}
|
||
|
||
void Music::setKey(byte voice, byte note, bool on, bool spec) {
|
||
short freq = 0;
|
||
short octa = 0;
|
||
|
||
// Instruction AX
|
||
if (spec) {
|
||
// 0x7F donne 0x16B;
|
||
// 7F
|
||
// << 7 = 3F80
|
||
// + E000 = 11F80
|
||
// & FFFF = 1F80
|
||
// * 19 = 31380
|
||
// / 2000 = 18 => Ligne 18h, colonne 0 => freq 16B
|
||
|
||
// 0x3A donne 0x2AF;
|
||
// 3A
|
||
// << 7 = 1D00
|
||
// + E000 = FD00 n<>gatif
|
||
// * 19 = xB500
|
||
// / 2000 = -2 => Ligne 17h, colonne -1
|
||
|
||
// 2E
|
||
// << 7 = 1700
|
||
// + E000 = F700 n<>gatif
|
||
// * 19 = x1F00
|
||
// / 2000 =
|
||
short a;
|
||
short lin;
|
||
short col;
|
||
|
||
a = (note << 7) + 0xE000; // Volontairement tronqu<71>
|
||
a = (short)((long)a * 25 / 0x2000);
|
||
if (a < 0) {
|
||
col = - ((24 - a) / 25);
|
||
lin = (-a % 25);
|
||
if (lin)
|
||
lin = 25 - lin;
|
||
}
|
||
else {
|
||
col = a / 25;
|
||
lin = a % 25;
|
||
}
|
||
|
||
_notCol[voice] = col;
|
||
_notLin[voice] = lin;
|
||
note = _notes[voice];
|
||
}
|
||
// Instructions 0X 9X 8X
|
||
else {
|
||
note -= 12;
|
||
_notOn[voice] = on;
|
||
}
|
||
|
||
_notes[voice] = note;
|
||
note += _notCol[voice];
|
||
note = MIN(0x5F, (int)note);
|
||
octa = note / 12;
|
||
freq = _freqs[_notLin[voice]][note - octa * 12];
|
||
|
||
writeOPL(0xA0 + voice, freq & 0xff);
|
||
writeOPL(0xB0 + voice, (freq >> 8) | (octa << 2) | 0x20 * on);
|
||
|
||
if (!freq)
|
||
warning("Voice %d, note %02X unknown\n", voice, note);
|
||
}
|
||
|
||
void Music::setVolume(byte voice, byte volume) {
|
||
volume = 0x3F - (volume * 0x7E + 0x7F) / 0xFE;
|
||
writeOPL(0x40 + _volRegNums[voice], volume);
|
||
}
|
||
|
||
void Music::pollMusic(void) {
|
||
unsigned char instr;
|
||
byte channel;
|
||
byte note;
|
||
byte volume;
|
||
uint16 tempo;
|
||
|
||
if (_playPos > (_data + _dataSize)) {
|
||
_ended = true;
|
||
return;
|
||
}
|
||
|
||
// First tempo, we'll ignore it...
|
||
if (_first) {
|
||
tempo = *(_playPos++);
|
||
// Tempo on 2 bytes
|
||
if (tempo & 0x80)
|
||
tempo = ((tempo & 3) << 8) | *(_playPos++);
|
||
}
|
||
_first = false;
|
||
|
||
// Instruction
|
||
instr = *(_playPos++);
|
||
channel = instr & 0x0F;
|
||
|
||
switch (instr & 0xF0) {
|
||
// Note on + Volume
|
||
case 0x00:
|
||
note = *(_playPos++);
|
||
_pollNotes[channel] = note;
|
||
setVolume(channel, *(_playPos++));
|
||
setKey(channel, note, true, false);
|
||
break;
|
||
// Note on
|
||
case 0x90:
|
||
note = *(_playPos++);
|
||
_pollNotes[channel] = note;
|
||
setKey(channel, note, true, false);
|
||
break;
|
||
// Last note off
|
||
case 0x80:
|
||
note = _pollNotes[channel];
|
||
setKey(channel, note, false, false);
|
||
break;
|
||
// Frequency on/off
|
||
case 0xA0:
|
||
note = *(_playPos++);
|
||
setKey(channel, note, _notOn[channel], true);
|
||
break;
|
||
// Volume
|
||
case 0xB0:
|
||
volume = *(_playPos++);
|
||
setVolume(channel, volume);
|
||
break;
|
||
// Program change
|
||
case 0xC0:
|
||
setVoice(channel, *(_playPos++), false);
|
||
break;
|
||
// Special
|
||
case 0xF0:
|
||
break;
|
||
default:
|
||
warning("Unknown command in ADL, stopping playback");
|
||
_looping = false;
|
||
_ended = true;
|
||
break;
|
||
}
|
||
// End instruction
|
||
if (instr == 0xFF) {
|
||
_ended = true;
|
||
}
|
||
|
||
// Temporization
|
||
tempo = *(_playPos++);
|
||
// End tempo
|
||
if (tempo == 0xFF) {
|
||
_ended = true;
|
||
return;
|
||
}
|
||
// Tempo on 2 bytes
|
||
if (tempo & 0x80)
|
||
tempo = ((tempo & 3) << 8) | *(_playPos++);
|
||
if (!tempo)
|
||
tempo ++;
|
||
|
||
_samplesTillPoll = tempo * (_rate / 1000);
|
||
}
|
||
|
||
void Music::startPlay(void) {
|
||
if (!_data)
|
||
return;
|
||
|
||
_playing = true;
|
||
}
|
||
|
||
void Music::playBgMusic(void) {
|
||
debug(2, "Music::playBgMusic()");
|
||
for (int i = 0; i < ARRAYSIZE(_tracks); i++)
|
||
if (!scumm_stricmp(_vm->_game->_curTotFile, _tracks[i][0])) {
|
||
playTrack(_tracks[i][1]);
|
||
break;
|
||
}
|
||
}
|
||
|
||
void Music::playTrack(const char *trackname) {
|
||
if (_playing) return;
|
||
|
||
debug(2, "Music::playTrack(%s)", trackname);
|
||
unloadMusic();
|
||
for (int i = 0; i < ARRAYSIZE(_tracksToFiles); i++)
|
||
if (!scumm_stricmp(trackname, _tracksToFiles[i][0])) {
|
||
loadMusic(_tracksToFiles[i][1]);
|
||
startPlay();
|
||
break;
|
||
}
|
||
}
|
||
|
||
bool Music::loadMusic(const char *filename) {
|
||
Common::File song;
|
||
|
||
song.open(filename);
|
||
if (!song.isOpen())
|
||
return false;
|
||
|
||
_dataSize = song.size();
|
||
_data = new byte[_dataSize];
|
||
song.read(_data, _dataSize);
|
||
song.close();
|
||
|
||
reset();
|
||
setVoices();
|
||
_playPos = _data + 3 + (_data[1] + 1) * 0x38;
|
||
|
||
return true;
|
||
}
|
||
|
||
void Music::unloadMusic(void) {
|
||
_playing = false;
|
||
|
||
if (_data)
|
||
delete _data;
|
||
}
|
||
|
||
} // End of namespace Gob
|