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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 "sky/music/gmmusic.h"
#include "sky/music/gmchannel.h"
#include "sky/sky.h"
#include "common/util.h"
#include "common/endian.h"
#include "sound/mididrv.h"
namespace Sky {
void GmMusic::passTimerFunc(void *param) {
((GmMusic*)param)->timerCall();
}
GmMusic::GmMusic(MidiDriver *pMidiDrv, Disk *pDisk)
: MusicBase(pDisk) {
_driverFileBase = 60200;
_midiDrv = pMidiDrv;
int midiRes = _midiDrv->open();
if (midiRes != 0)
error("Can't open midi device. Errorcode: %d", midiRes);
_timerCount = 0;
_midiDrv->setTimerCallback(this, passTimerFunc);
}
GmMusic::~GmMusic(void) {
_midiDrv->setTimerCallback(NULL, NULL);
if (_currentMusic)
stopMusic();
// Send All Sound Off and All Notes Off (for external synths)
for (int i = 0; i < 16; i++) {
_midiDrv->send ((120 << 8) | 0xB0 | i);
_midiDrv->send ((123 << 8) | 0xB0 | i);
}
_midiDrv->close();
delete _midiDrv;
}
void GmMusic::setVolume(uint16 param) {
_musicVolume = param;
for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++)
_channels[cnt]->updateVolume(_musicVolume);
}
void GmMusic::timerCall(void) {
_timerCount += _midiDrv->getBaseTempo();
if (_timerCount > (1000 * 1000 / 50)) {
// call pollMusic() 50 times per second
_timerCount -= 1000 * 1000 / 50;
if (_musicData != NULL)
pollMusic();
}
}
void GmMusic::setupPointers(void) {
if (SkyEngine::_systemVars.gameVersion == 109) {
_musicDataLoc = READ_LE_UINT16(_musicData + 0x79B);
_sysExSequence = _musicData + 0x1EF2;
} else {
_musicDataLoc = READ_LE_UINT16(_musicData + 0x7DC);
_sysExSequence = READ_LE_UINT16(_musicData + 0x7E0) + _musicData;
}
}
void GmMusic::setupChannels(uint8 *channelData) {
_numberOfChannels = channelData[0];
channelData++;
for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++) {
uint16 chDataStart = READ_LE_UINT16((uint16 *)channelData + cnt) + _musicDataLoc;
_channels[cnt] = new GmChannel(_musicData, chDataStart, _midiDrv, MidiDriver::_mt32ToGm, _veloTab);
_channels[cnt]->updateVolume(_musicVolume);
}
}
void GmMusic::startDriver(void) {
// Send GM System On to reset channel parameters etc.
uint8 sysEx[] = { 0x7e, 0x7f, 0x09, 0x01 };
_midiDrv->sysEx(sysEx, sizeof(sysEx));
//_midiDrv->send(0xFF); //ALSA can't handle this.
// skip all sysEx as it can't be handled anyways.
}
const byte GmMusic::_veloTab[128] = {
0x00, 0x40, 0x41, 0x41, 0x42, 0x42, 0x43, 0x43, 0x44, 0x44,
0x45, 0x45, 0x46, 0x46, 0x47, 0x47, 0x48, 0x48, 0x49, 0x49,
0x4A, 0x4A, 0x4B, 0x4B, 0x4C, 0x4C, 0x4D, 0x4D, 0x4E, 0x4E,
0x4F, 0x4F, 0x50, 0x50, 0x51, 0x51, 0x52, 0x52, 0x53, 0x53,
0x54, 0x54, 0x55, 0x55, 0x56, 0x56, 0x57, 0x57, 0x58, 0x58,
0x59, 0x59, 0x5A, 0x5A, 0x5B, 0x5B, 0x5C, 0x5C, 0x5D, 0x5D,
0x5E, 0x5E, 0x5F, 0x5F, 0x60, 0x60, 0x61, 0x61, 0x62, 0x62,
0x63, 0x63, 0x64, 0x64, 0x65, 0x65, 0x66, 0x66, 0x67, 0x67,
0x68, 0x68, 0x69, 0x69, 0x6A, 0x6A, 0x6B, 0x6B, 0x6C, 0x6C,
0x6D, 0x6D, 0x6E, 0x6E, 0x6F, 0x6F, 0x70, 0x70, 0x71, 0x71,
0x72, 0x72, 0x73, 0x73, 0x74, 0x74, 0x75, 0x75, 0x76, 0x76,
0x77, 0x77, 0x78, 0x78, 0x79, 0x79, 0x7A, 0x7A, 0x7B, 0x7B,
0x7C, 0x7C, 0x7D, 0x7D, 0x7E, 0x7E, 0x7F, 0x7F
};
} // End of namespace Sky
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