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/* ScummVM - Scumm Interpreter
* Copyright (C) 2003 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "sky/mt32music.h"
void SkyMT32Music::passTimerFunc(void *param) {
((SkyMT32Music*)param)->timerCall();
}
SkyMT32Music::SkyMT32Music(MidiDriver *pMidiDrv, SkyDisk *pSkyDisk)
: SkyMusicBase(pSkyDisk) {
_driverFileBase = 60200;
_midiDrv = pMidiDrv;
int midiRes = _midiDrv->open();
if (midiRes != 0) {
error("Can't open midi device. Errorcode: %d\n",midiRes);
}
_midiDrv->setTimerCallback(this, passTimerFunc);
_ignoreNextPoll = false;
for (uint8 cnt = 0; cnt < 128; cnt++)
_dummyMap[cnt] = cnt;
}
SkyMT32Music::~SkyMT32Music(void) {
_midiDrv->close();
_midiDrv->setTimerCallback(NULL, NULL);
delete _midiDrv;
}
void SkyMT32Music::timerCall(void) {
// midi driver polls hundred times per sec. We only want 50 times.
_ignoreNextPoll = !_ignoreNextPoll;
if (!_ignoreNextPoll) return;
if (_musicData != NULL)
pollMusic();
}
void SkyMT32Music::setupPointers(void) {
_musicDataLoc = (_musicData[0x7DD] << 8) | _musicData[0x7DC];
_sysExSequence = ((_musicData[0x7E1] << 8) | _musicData[0x7E0]) + _musicData;
}
void SkyMT32Music::setupChannels(uint8 *channelData) {
_numberOfChannels = channelData[0];
channelData++;
for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++) {
uint16 chDataStart = ((channelData[(cnt << 1) | 1] << 8) | channelData[cnt << 1]) + _musicDataLoc;
_channels[cnt] = new SkyGmChannel(_musicData, chDataStart, _midiDrv, _dummyMap);
}
}
#define MIDI_PACK(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((d) << 24))
bool SkyMT32Music::processPatchSysEx(uint8 *sysExData) {
uint8 crc = 0;
if (sysExData[0] & 0x80) return false;
uint8 patchNum = sysExData[0];
sysExData++;
uint8 timbreGroup = sysExData[0] >> 6;
uint8 timbreNumber = sysExData[0] & 0x3F;
uint8 keyShift = sysExData[1] & 0x3F;
uint8 fineTune = sysExData[2] & 0x7F;
uint8 benderRange = sysExData[3] & 0x7F;
uint8 assignMode = sysExData[1] >> 6;
uint8 reverbSwitch = sysExData[2] >> 7;
_midiDrv->send(MIDI_PACK(0xF0, 0x41, 0x10, 0x16));
_midiDrv->send(MIDI_PACK(0x12, 5, patchNum >> 4, (patchNum & 0xF) << 3));
crc -= 5 + (patchNum >> 4) + ((patchNum & 0xF) << 3);
crc -= timbreGroup + timbreNumber + keyShift + fineTune;
crc -= benderRange + assignMode + reverbSwitch;
_midiDrv->send(MIDI_PACK(timbreGroup, timbreNumber, keyShift, fineTune));
_midiDrv->send(MIDI_PACK(benderRange, assignMode, reverbSwitch, crc));
_midiDrv->send(0xF7);
debug(3," Patch %02X:\n",patchNum);
debug(3," Timbre Group: %d\n",timbreGroup);
debug(3," Timbre Number: %d\n",timbreNumber);
debug(3," Key Shift: %d\n",keyShift);
debug(3," Fine Tune: %d\n",fineTune);
debug(3," Bender Range: %d\n",benderRange);
debug(3," Assign Mode: %d\n",assignMode);
debug(3," Reverb Switch: %d\n\n",reverbSwitch);
return true;
}
void SkyMT32Music::startDriver(void) {
_midiDrv->send(0xFF); // reset midi device
// setup timbres and patches using SysEx data
uint8* sysExData = _sysExSequence;
uint8 timbreNum = sysExData[0];
uint8 cnt, crc;
uint32 sysComb;
sysExData++;
for (cnt = 0; cnt < timbreNum; cnt++) {
crc = 0;
_midiDrv->send(MIDI_PACK(0xF0, 0x41, 0x10, 0x16));
//- sendTimbreAddress
sysComb = (0x2 << 16) | (sysExData[0] << 8) | 0xA;
sysExData++;
uint8 sysByte1 = (uint8)(sysComb >> 14);
uint8 sysByte2 = (uint8)((sysComb & 0x3FFF) >> 7);
uint8 sysByte3 = (uint8)(sysComb & 0x7F);
_midiDrv->send(MIDI_PACK(0x12, sysByte1, sysByte2, sysByte3));
debug(3,"InitBySysEx: Timbre address: %02X:%02X:%02X (%02X)\n",sysByte1,sysByte2,sysByte3,(sysExData-1)[0]);
crc -= sysByte1 + sysByte2 + sysByte3;
//- sendTimbreData
uint8 dataLen = sysExData[0];
debug(3,"[%02X]",dataLen);
sysExData++;
uint32 nextSend = 0;
uint8 bytesInSend = 0;
debug(3," Timbre Data:");
do {
uint8 rlVal = 1;
uint8 codeVal = sysExData[0];
sysExData++;
if (codeVal & 0x80) {
codeVal &= 0x7F;
rlVal = sysExData[0];
sysExData++;
dataLen--;
}
for (uint8 cnt = 0; cnt < rlVal; cnt++) {
nextSend |= codeVal << (bytesInSend << 3);
crc -= codeVal;
debug(3," %02X",codeVal);
bytesInSend++;
if (bytesInSend == 4) {
_midiDrv->send(nextSend);
nextSend = bytesInSend = 0;
}
}
dataLen--;
} while (dataLen > 0);
crc &= 0x7F;
debug(3," %02X F7\n",crc);
nextSend |= crc << (bytesInSend << 3);
bytesInSend++;
if (bytesInSend == 4) {
_midiDrv->send(nextSend);
nextSend = bytesInSend = 0;
}
nextSend |= 0xF7 << (bytesInSend << 3);
_midiDrv->send(nextSend);
}
while (processPatchSysEx(sysExData))
sysExData += 5;
}
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