mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-23 02:11:38 +00:00
484 lines
10 KiB
C++
484 lines
10 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/file.h"
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#include "common/endian.h"
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#include "gob/gob.h"
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#include "gob/music.h"
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#include "gob/game.h"
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#include "gob/util.h"
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namespace Gob {
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const char *Adlib::_tracks[][2] = {
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{"avt00.tot", "mine"},
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{"avt001.tot", "nuit"},
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{"avt002.tot", "campagne"},
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{"avt003.tot", "extsor1"},
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{"avt004.tot", "interieure"},
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{"avt005.tot", "zombie"},
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{"avt006.tot", "zombie"},
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{"avt007.tot", "campagne"},
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{"avt008.tot", "campagne"},
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{"avt009.tot", "extsor1"},
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{"avt010.tot", "extsor1"},
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{"avt011.tot", "interieure"},
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{"avt012.tot", "zombie"},
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{"avt014.tot", "nuit"},
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{"avt015.tot", "interieure"},
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{"avt016.tot", "statue"},
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{"avt017.tot", "zombie"},
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{"avt018.tot", "statue"},
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{"avt019.tot", "mine"},
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{"avt020.tot", "statue"},
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{"avt021.tot", "mine"},
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{"avt022.tot", "zombie"}
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};
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const char *Adlib::_trackFiles[] = {
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// "musmac1.adl", // TODO: This track isn't played correctly at all yet
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"musmac2.adl",
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"musmac3.adl",
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"musmac4.adl",
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"musmac5.adl",
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"musmac6.adl"
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};
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const unsigned char Adlib::_operators[] = {0, 1, 2, 8, 9, 10, 16, 17, 18};
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const unsigned char Adlib::_volRegNums[] = {
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3, 4, 5,
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11, 12, 13,
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19, 20, 21
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};
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Adlib::Adlib(GobEngine *vm) : _vm(vm) {
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int i;
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_index = -1;
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_data = 0;
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_playPos = 0;
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_dataSize = 0;
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_rate = _vm->_mixer->getOutputRate();
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_opl = makeAdlibOPL(_rate);
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_first = true;
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_ended = false;
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_playing = false;
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_needFree = false;
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_repCount = -1;
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_samplesTillPoll = 0;
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for (i = 0; i < 16; i ++)
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_pollNotes[i] = 0;
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setFreqs();
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_vm->_mixer->playInputStream(Audio::Mixer::kMusicSoundType, &_handle,
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this, -1, 255, 0, false, true);
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}
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Adlib::~Adlib() {
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Common::StackLock slock(_mutex);
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_vm->_mixer->stopHandle(_handle);
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OPLDestroy(_opl);
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if (_data && _needFree)
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delete[] _data;
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}
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int Adlib::readBuffer(int16 *buffer, const int numSamples) {
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Common::StackLock slock(_mutex);
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int samples;
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int render;
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if (!_playing || (numSamples < 0)) {
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memset(buffer, 0, numSamples * sizeof(int16));
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return numSamples;
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}
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if (_first) {
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memset(buffer, 0, numSamples * sizeof(int16));
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pollMusic();
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return numSamples;
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}
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samples = numSamples;
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while (samples && _playing) {
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if (_samplesTillPoll) {
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render = (samples > _samplesTillPoll) ? (_samplesTillPoll) : (samples);
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samples -= render;
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_samplesTillPoll -= render;
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YM3812UpdateOne(_opl, buffer, render);
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buffer += render;
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} else {
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pollMusic();
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if (_ended) {
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memset(buffer, 0, samples * sizeof(int16));
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samples = 0;
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}
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}
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}
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if (_ended) {
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_first = true;
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_ended = false;
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_playPos = _data + 3 + (_data[1] + 1) * 0x38;
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_samplesTillPoll = 0;
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if (_repCount == -1) {
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reset();
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setVoices();
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} else if (_repCount > 0) {
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_repCount--;
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reset();
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setVoices();
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}
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else
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_playing = false;
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}
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return numSamples;
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}
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void Adlib::writeOPL(byte reg, byte val) {
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debugC(6, kDebugMusic, "writeOPL(%02X, %02X)", reg, val);
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OPLWriteReg(_opl, reg, val);
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}
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void Adlib::setFreqs() {
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byte lin;
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byte col;
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long val = 0;
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// Run through the 11 channels
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for (lin = 0; lin < 11; lin ++) {
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_notes[lin] = 0;
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_notCol[lin] = 0;
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_notLin[lin] = 0;
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_notOn[lin] = false;
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}
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// Run through the 25 lines
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for (lin = 0; lin < 25; lin ++) {
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// Run through the 12 columns
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for (col = 0; col < 12; col ++) {
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if (!col)
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val = (((0x2710L + lin * 0x18) * 0xCB78 / 0x3D090) << 0xE) *
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9 / 0x1B503;
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_freqs[lin][col] = (short)((val + 4) >> 3);
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val = val * 0x6A / 0x64;
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}
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}
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}
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void Adlib::reset() {
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_first = true;
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OPLResetChip(_opl);
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_samplesTillPoll = 0;
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setFreqs();
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// Set frequencies and octave to 0; notes off
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for (int i = 0; i < 9; i++) {
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writeOPL(0xA0 | i, 0);
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writeOPL(0xB0 | i, 0);
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writeOPL(0xE0 | _operators[i] , 0);
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writeOPL(0xE0 | _operators[i] + 3, 0);
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}
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// Authorize the control of the waveformes
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writeOPL(0x01, 0x20);
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}
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void Adlib::setVoices() {
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// Definitions of the 9 instruments
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for (int i = 0; i < 9; i++)
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setVoice(i, i, true);
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}
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void Adlib::setVoice(byte voice, byte instr, bool set) {
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int i;
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int j;
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uint16 strct[27];
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byte channel;
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byte *dataPtr;
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// i = 0 : 0 1 2 3 4 5 6 7 8 9 10 11 12 26
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// i = 1 : 13 14 15 16 17 18 19 20 21 22 23 24 25 27
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for (i = 0; i < 2; i++) {
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dataPtr = _data + 3 + instr * 0x38 + i * 0x1A;
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for (j = 0; j < 27; j++) {
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strct[j] = READ_LE_UINT16(dataPtr);
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dataPtr += 2;
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}
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channel = _operators[voice] + i * 3;
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writeOPL(0xBD, 0x00);
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writeOPL(0x08, 0x00);
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writeOPL(0x40 | channel, ((strct[0] & 3) << 6) | (strct[8] & 0x3F));
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if (!i)
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writeOPL(0xC0 | voice,
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((strct[2] & 7) << 1) | (1 - (strct[12] & 1)));
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writeOPL(0x60 | channel, ((strct[3] & 0xF) << 4) | (strct[6] & 0xF));
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writeOPL(0x80 | channel, ((strct[4] & 0xF) << 4) | (strct[7] & 0xF));
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writeOPL(0x20 | channel, ((strct[9] & 1) << 7) |
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((strct[10] & 1) << 6) | ((strct[5] & 1) << 5) |
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((strct[11] & 1) << 4) | (strct[1] & 0xF));
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if (!i)
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writeOPL(0xE0 | channel, (strct[26] & 3));
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else
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writeOPL(0xE0 | channel, (strct[14] & 3));
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if (i && set)
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writeOPL(0x40 | channel, 0);
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}
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}
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void Adlib::setKey(byte voice, byte note, bool on, bool spec) {
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short freq = 0;
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short octa = 0;
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// Instruction AX
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if (spec) {
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// 0x7F donne 0x16B;
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// 7F
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// << 7 = 3F80
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// + E000 = 11F80
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// & FFFF = 1F80
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// * 19 = 31380
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// / 2000 = 18 => Ligne 18h, colonne 0 => freq 16B
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// 0x3A donne 0x2AF;
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// 3A
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// << 7 = 1D00
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// + E000 = FD00 negatif
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// * 19 = xB500
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// / 2000 = -2 => Ligne 17h, colonne -1
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// 2E
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// << 7 = 1700
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// + E000 = F700 negatif
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// * 19 = x1F00
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// / 2000 =
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short a;
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short lin;
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short col;
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a = (note << 7) + 0xE000; // Volontairement tronque
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a = (short)((long)a * 25 / 0x2000);
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if (a < 0) {
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col = - ((24 - a) / 25);
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lin = (-a % 25);
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if (lin)
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lin = 25 - lin;
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}
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else {
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col = a / 25;
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lin = a % 25;
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}
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_notCol[voice] = col;
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_notLin[voice] = lin;
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note = _notes[voice];
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}
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// Instructions 0X 9X 8X
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else {
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note -= 12;
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_notOn[voice] = on;
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}
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_notes[voice] = note;
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note += _notCol[voice];
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note = MIN((byte) 0x5F, note);
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octa = note / 12;
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freq = _freqs[_notLin[voice]][note - octa * 12];
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writeOPL(0xA0 + voice, freq & 0xFF);
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writeOPL(0xB0 + voice, (freq >> 8) | (octa << 2) | 0x20 * on);
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if (!freq)
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warning("Voice %d, note %02X unknown\n", voice, note);
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}
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void Adlib::setVolume(byte voice, byte volume) {
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volume = 0x3F - (volume * 0x7E + 0x7F) / 0xFE;
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writeOPL(0x40 + _volRegNums[voice], volume);
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}
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void Adlib::pollMusic() {
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unsigned char instr;
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byte channel;
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byte note;
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byte volume;
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uint16 tempo;
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if ((_playPos > (_data + _dataSize)) && (_dataSize != 0xFFFFFFFF)) {
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_ended = true;
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return;
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}
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// First tempo, we'll ignore it...
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if (_first) {
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tempo = *(_playPos++);
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// Tempo on 2 bytes
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if (tempo & 0x80)
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tempo = ((tempo & 3) << 8) | *(_playPos++);
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}
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_first = false;
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// Instruction
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instr = *(_playPos++);
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channel = instr & 0x0F;
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switch (instr & 0xF0) {
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// Note on + Volume
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case 0x00:
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note = *(_playPos++);
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_pollNotes[channel] = note;
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setVolume(channel, *(_playPos++));
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setKey(channel, note, true, false);
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break;
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// Note on
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case 0x90:
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note = *(_playPos++);
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_pollNotes[channel] = note;
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setKey(channel, note, true, false);
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break;
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// Last note off
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case 0x80:
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note = _pollNotes[channel];
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setKey(channel, note, false, false);
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break;
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// Frequency on/off
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case 0xA0:
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note = *(_playPos++);
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setKey(channel, note, _notOn[channel], true);
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break;
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// Volume
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case 0xB0:
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volume = *(_playPos++);
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setVolume(channel, volume);
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break;
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// Program change
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case 0xC0:
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setVoice(channel, *(_playPos++), false);
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break;
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// Special
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case 0xF0:
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switch (instr & 0x0F) {
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case 0xF: // End instruction
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_ended = true;
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_samplesTillPoll = 0;
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return;
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default:
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warning("Unknown special command in ADL, stopping playback: %X",
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instr & 0x0F);
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_repCount = 0;
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_ended = true;
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break;
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}
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break;
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default:
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warning("Unknown command in ADL, stopping playback: %X",
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instr & 0xF0);
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_repCount = 0;
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_ended = true;
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break;
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}
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// Temporization
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tempo = *(_playPos++);
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// End tempo
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if (tempo == 0xFF) {
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_ended = true;
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return;
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}
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// Tempo on 2 bytes
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if (tempo & 0x80)
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tempo = ((tempo & 3) << 8) | *(_playPos++);
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if (!tempo)
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tempo ++;
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_samplesTillPoll = tempo * (_rate / 1000);
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}
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void Adlib::playBgMusic() {
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for (int i = 0; i < ARRAYSIZE(_tracks); i++)
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if (!scumm_stricmp(_vm->_game->_curTotFile, _tracks[i][0])) {
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playTrack(_tracks[i][1]);
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break;
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}
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}
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void Adlib::playTrack(const char *trackname) {
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if (_playing) return;
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debugC(1, kDebugMusic, "Adlib::playTrack(%s)", trackname);
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unload();
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load(_trackFiles[_vm->_util->getRandom(ARRAYSIZE(_trackFiles))]);
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startPlay();
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}
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bool Adlib::load(const char *fileName) {
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Common::File song;
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unload();
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song.open(fileName);
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if (!song.isOpen())
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return false;
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_needFree = true;
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_dataSize = song.size();
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_data = new byte[_dataSize];
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song.read(_data, _dataSize);
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song.close();
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reset();
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setVoices();
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_playPos = _data + 3 + (_data[1] + 1) * 0x38;
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return true;
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}
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void Adlib::load(byte *data, uint32 size, int index) {
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unload();
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_repCount = 0;
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_dataSize = size;
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_data = data;
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_index = index;
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reset();
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setVoices();
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_playPos = _data + 3 + (_data[1] + 1) * 0x38;
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}
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void Adlib::unload() {
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_playing = false;
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_index = -1;
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if (_data && _needFree)
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delete[] _data;
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_needFree = false;
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}
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} // End of namespace Gob
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