scummvm/engines/gob/music.cpp
Sven Hesse 8e6cd81333 - Just warn, don't die, when a CD-Track isn't found
- Before using _vm->_adlib, first check whether it's actually there

svn-id: r25205
2007-01-26 19:00:41 +00:00

494 lines
10 KiB
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/* ScummVM - Scumm Interpreter
* Copyright (C) 2006 The ScummVM project
* Original ADL-Player source Copyright (C) 2004 by Patrick Combet aka 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.
*
* $URL$
* $Id$
*
*/
#include "common/file.h"
#include "common/stdafx.h"
#include "common/endian.h"
#include "gob/music.h"
#include "gob/gob.h"
#include "gob/game.h"
#include "gob/util.h"
namespace Gob {
const char *Adlib::_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 *Adlib::_trackFiles[] = {
// "musmac1.adl", // TODO: This track isn't played correctly at all yet
"musmac2.adl",
"musmac3.adl",
"musmac4.adl",
"musmac5.adl",
"musmac6.adl"
};
const unsigned char Adlib::_operators[] = {0, 1, 2, 8, 9, 10, 16, 17, 18};
const unsigned char Adlib::_volRegNums[] = {
3, 4, 5,
11, 12, 13,
19, 20, 21
};
Adlib::Adlib(GobEngine *vm) : _vm(vm) {
int i;
_index = -1;
_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;
_needFree = false;
_repCount = -1;
_samplesTillPoll = 0;
for (i = 0; i < 16; i ++)
_pollNotes[i] = 0;
setFreqs();
}
Adlib::~Adlib(void) {
OPLDestroy(_opl);
if (_data && _needFree)
delete[] _data;
_vm->_mixer->setupPremix(0);
}
void Adlib::premixerCall(int16 *buf, uint len) {
_mutex.lock();
if (!_playing) {
memset(buf, 0, 2 * len * sizeof(int16));
_mutex.unlock();
return;
}
else {
if (_first) {
memset(buf, 0, 2 * len * sizeof(int16));
pollMusic();
_mutex.unlock();
return;
}
else {
uint32 render;
int16 *data = buf;
uint datalen = len;
while (datalen && _playing) {
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 (_repCount == -1) {
reset();
setVoices();
} else if (_repCount > 0) {
_repCount--;
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];
}
}
_mutex.unlock();
}
void Adlib::writeOPL(byte reg, byte val) {
debugC(6, kDebugMusic, "writeOPL(%02X, %02X)", reg, val);
OPLWriteReg(_opl, reg, val);
}
void Adlib::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;
}
}
}
void Adlib::reset() {
OPLResetChip(_opl);
_samplesTillPoll = 0;
setFreqs();
// 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 Adlib::setVoices() {
// Definitions of the 9 instruments
for (int i = 0; i < 9; i++)
setVoice(i, i, true);
}
void Adlib::setVoice(byte voice, byte instr, bool set) {
int i;
int j;
uint16 strct[27];
byte channel;
byte *dataPtr;
// 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 (i = 0; i < 2; i++) {
dataPtr = _data + 3 + instr * 0x38 + i * 0x1A;
for (j = 0; j < 27; j++) {
strct[j] = READ_LE_UINT16(dataPtr);
dataPtr += 2;
}
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 Adlib::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((byte) 0x5F, 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 Adlib::setVolume(byte voice, byte volume) {
volume = 0x3F - (volume * 0x7E + 0x7F) / 0xFE;
writeOPL(0x40 + _volRegNums[voice], volume);
}
void Adlib::pollMusic(void) {
unsigned char instr;
byte channel;
byte note;
byte volume;
uint16 tempo;
if ((_playPos > (_data + _dataSize)) && (_dataSize != (uint32) -1)) {
_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;
case 0x10:
warning("GOB2 Stub! ADL command 0x10");
break;
case 0x50:
warning("GOB2 Stub! ADL command 0x50");
break;
// Note on
case 0x90:
note = *(_playPos++);
_pollNotes[channel] = note;
setKey(channel, note, true, false);
break;
case 0x60:
warning("GOB2 Stub! ADL command 0x60");
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:
switch (instr & 0x0F) {
case 0xF: // End instruction
_ended = true;
_samplesTillPoll = 0;
return;
default:
warning("Unknown special command in ADL, stopping playback: %X",
instr & 0x0F);
_repCount = 0;
_ended = true;
break;
}
break;
default:
warning("Unknown command in ADL, stopping playback: %X",
instr & 0xF0);
_repCount = 0;
_ended = true;
break;
}
// 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 Adlib::playBgMusic(void) {
for (int i = 0; i < ARRAYSIZE(_tracks); i++)
if (!scumm_stricmp(_vm->_game->_curTotFile, _tracks[i][0])) {
playTrack(_tracks[i][1]);
break;
}
}
void Adlib::playTrack(const char *trackname) {
if (_playing) return;
debugC(1, kDebugMusic, "Adlib::playTrack(%s)", trackname);
unload();
load(_trackFiles[_vm->_util->getRandom(ARRAYSIZE(_trackFiles))]);
startPlay();
}
bool Adlib::load(const char *filename) {
Common::File song;
unload();
song.open(filename);
if (!song.isOpen())
return false;
_needFree = true;
_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 Adlib::load(byte *data, int index) {
unload();
_repCount = 0;
_dataSize = (uint32) -1;
_data = data;
_index = index;
reset();
setVoices();
_playPos = _data + 3 + (_data[1] + 1) * 0x38;
}
void Adlib::unload(void) {
_playing = false;
_index = -1;
if (_data && _needFree)
delete[] _data;
_needFree = false;
}
} // End of namespace Gob