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119 lines
3.7 KiB
C++
119 lines
3.7 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2003-2006 The ScummVM project
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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 "sky/music/gmmusic.h"
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#include "sky/music/gmchannel.h"
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#include "sky/sky.h"
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#include "common/util.h"
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#include "sound/mididrv.h"
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namespace Sky {
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void GmMusic::passTimerFunc(void *param) {
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((GmMusic*)param)->timerCall();
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}
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GmMusic::GmMusic(MidiDriver *pMidiDrv, Disk *pDisk)
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: MusicBase(pDisk) {
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_driverFileBase = 60200;
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_midiDrv = pMidiDrv;
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int midiRes = _midiDrv->open();
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if (midiRes != 0)
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error("Can't open midi device. Errorcode: %d", midiRes);
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_timerCount = 0;
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_midiDrv->setTimerCallback(this, passTimerFunc);
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}
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GmMusic::~GmMusic(void) {
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_midiDrv->setTimerCallback(NULL, NULL);
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if (_currentMusic)
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stopMusic();
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// Send All Sound Off and All Notes Off (for external synths)
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for (int i = 0; i < 16; ++i) {
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_midiDrv->send ((120 << 8) | 0xB0 | i);
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_midiDrv->send ((123 << 8) | 0xB0 | i);
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}
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_midiDrv->close();
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delete _midiDrv;
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}
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void GmMusic::timerCall(void) {
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_timerCount += _midiDrv->getBaseTempo();
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if (_timerCount > (1000000 / 50)) {
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// call pollMusic() 50 times per second
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_timerCount -= 1000000 / 50;
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if (_musicData != NULL)
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pollMusic();
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}
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}
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void GmMusic::setupPointers(void) {
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if (SkyEngine::_systemVars.gameVersion == 109) {
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_musicDataLoc = (_musicData[0x79C] << 8) | _musicData[0x79B];
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_sysExSequence = _musicData + 0x1EF2;
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} else {
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_musicDataLoc = (_musicData[0x7DD] << 8) | _musicData[0x7DC];
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_sysExSequence = ((_musicData[0x7E1] << 8) | _musicData[0x7E0]) + _musicData;
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}
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}
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void GmMusic::setupChannels(uint8 *channelData) {
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_numberOfChannels = channelData[0];
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channelData++;
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for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++) {
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uint16 chDataStart = ((channelData[(cnt << 1) | 1] << 8) | channelData[cnt << 1]) + _musicDataLoc;
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_channels[cnt] = new GmChannel(_musicData, chDataStart, _midiDrv, MidiDriver::_mt32ToGm, _veloTab);
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_channels[cnt]->updateVolume(_musicVolume);
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}
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}
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void GmMusic::startDriver(void) {
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// Send GM System On to reset channel parameters on external and capa$
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uint8 sysEx[] = "\xf0\x7e\x7f\x09\x01\xf7";
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_midiDrv->sysEx(sysEx, 6);
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//_midiDrv->send(0xFF); //ALSA can't handle this.
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// skip all sysEx as it can't be handled anyways.
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}
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const byte GmMusic::_veloTab[128] = {
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0x00, 0x40, 0x41, 0x41, 0x42, 0x42, 0x43, 0x43, 0x44, 0x44,
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0x45, 0x45, 0x46, 0x46, 0x47, 0x47, 0x48, 0x48, 0x49, 0x49,
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0x4A, 0x4A, 0x4B, 0x4B, 0x4C, 0x4C, 0x4D, 0x4D, 0x4E, 0x4E,
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0x4F, 0x4F, 0x50, 0x50, 0x51, 0x51, 0x52, 0x52, 0x53, 0x53,
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0x54, 0x54, 0x55, 0x55, 0x56, 0x56, 0x57, 0x57, 0x58, 0x58,
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0x59, 0x59, 0x5A, 0x5A, 0x5B, 0x5B, 0x5C, 0x5C, 0x5D, 0x5D,
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0x5E, 0x5E, 0x5F, 0x5F, 0x60, 0x60, 0x61, 0x61, 0x62, 0x62,
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0x63, 0x63, 0x64, 0x64, 0x65, 0x65, 0x66, 0x66, 0x67, 0x67,
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0x68, 0x68, 0x69, 0x69, 0x6A, 0x6A, 0x6B, 0x6B, 0x6C, 0x6C,
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0x6D, 0x6D, 0x6E, 0x6E, 0x6F, 0x6F, 0x70, 0x70, 0x71, 0x71,
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0x72, 0x72, 0x73, 0x73, 0x74, 0x74, 0x75, 0x75, 0x76, 0x76,
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0x77, 0x77, 0x78, 0x78, 0x79, 0x79, 0x7A, 0x7A, 0x7B, 0x7B,
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0x7C, 0x7C, 0x7D, 0x7D, 0x7E, 0x7E, 0x7F, 0x7F
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};
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} // End of namespace Sky
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