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author | Max Horn | 2006-02-11 22:45:04 +0000 |
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committer | Max Horn | 2006-02-11 22:45:04 +0000 |
commit | 26ee630756ebdd7c96bccede0881a8c8b98e8f2b (patch) | |
tree | 26e378d5cf990a2b81c2c96e9e683a7f333b62e8 /engines/sky/music/musicbase.cpp | |
parent | 2a9a0d4211b1ea5723f1409d91cb95de8984429e (diff) | |
download | scummvm-rg350-26ee630756ebdd7c96bccede0881a8c8b98e8f2b.tar.gz scummvm-rg350-26ee630756ebdd7c96bccede0881a8c8b98e8f2b.tar.bz2 scummvm-rg350-26ee630756ebdd7c96bccede0881a8c8b98e8f2b.zip |
Moved engines to the new engines/ directory
svn-id: r20582
Diffstat (limited to 'engines/sky/music/musicbase.cpp')
-rw-r--r-- | engines/sky/music/musicbase.cpp | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/engines/sky/music/musicbase.cpp b/engines/sky/music/musicbase.cpp new file mode 100644 index 0000000000..9d308ebc7f --- /dev/null +++ b/engines/sky/music/musicbase.cpp @@ -0,0 +1,148 @@ +/* ScummVM - Scumm Interpreter + * Copyright (C) 2003-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * $URL$ + * $Id$ + * + */ + +#include "sky/music/musicbase.h" +#include "sky/disk.h" +#include "common/util.h" + +namespace Sky { + +MusicBase::MusicBase(Disk *pDisk) { + + _musicData = NULL; + _allowedCommands = 0; + _skyDisk = pDisk; + _currentMusic = 0; + _musicVolume = 127; + _numberOfChannels = _currentMusic = 0; +} + +MusicBase::~MusicBase(void) { + + stopMusic(); + if (_musicData) + free(_musicData); +} + +void MusicBase::loadSection(uint8 pSection) { + + _mutex.lock(); + if (_currentMusic) + stopMusic(); + if (_musicData) + free(_musicData); + _currentSection = pSection; + _musicData = _skyDisk->loadFile(_driverFileBase + FILES_PER_SECTION * pSection); + _allowedCommands = 0; + _musicTempo0 = 0x78; // init constants taken from idb file, area ~0x1060 + _musicTempo1 = 0xC0; + _onNextPoll.doReInit = false; + _onNextPoll.doStopMusic = false; + _onNextPoll.musicToProcess = 0; + _tempo = _aktTime = 0x10001; + _numberOfChannels = _currentMusic = 0; + setupPointers(); + startDriver(); + _mutex.unlock(); +} + +bool MusicBase::musicIsPlaying(void) { + + for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++) + if (_channels[cnt]->isActive()) + return true; + return false; +} + +void MusicBase::setVolume(uint16 param) { + + _musicVolume = param; + for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++) + _channels[cnt]->updateVolume(_musicVolume); +} + +void MusicBase::stopMusic(void) { + + for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++) { + _channels[cnt]->stopNote(); + delete _channels[cnt]; + } + _numberOfChannels = 0; +} + +void MusicBase::updateTempo(void) { + + uint16 tempoMul = _musicTempo0 * _musicTempo1; + uint16 divisor = 0x4446390/ 23864; + _tempo = (tempoMul / divisor) << 16; + _tempo |= (((tempoMul%divisor) << 16) | (tempoMul / divisor)) / divisor; +} + +void MusicBase::loadNewMusic(void) { + + uint16 musicPos; + if (_onNextPoll.musicToProcess > _musicData[_musicDataLoc]) { + error("Music %d requested but doesn't exist in file.", _onNextPoll.musicToProcess); + return; + } + if (_currentMusic != 0) + stopMusic(); + + _currentMusic = _onNextPoll.musicToProcess; + + if (_currentMusic != 0) { + musicPos = (_musicData[_musicDataLoc + 2] << 8) | _musicData[_musicDataLoc+1]; + musicPos += _musicDataLoc+((_currentMusic-1) << 1); + musicPos = ((_musicData[musicPos+1] << 8) | _musicData[musicPos]) + _musicDataLoc; + + _musicTempo0 = _musicData[musicPos]; + _musicTempo1 = _musicData[musicPos+1]; + + setupChannels(_musicData + musicPos + 2); + + updateTempo(); + } +} + +void MusicBase::pollMusic(void) { + + _mutex.lock(); + uint8 newTempo; + if (_onNextPoll.doReInit) startDriver(); + if (_onNextPoll.doStopMusic) stopMusic(); + if (_onNextPoll.musicToProcess != _currentMusic) + loadNewMusic(); + + _aktTime += _tempo; + + for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++) { + newTempo = _channels[cnt]->process((uint16)(_aktTime >> 16)); + if (newTempo) { + _musicTempo1 = newTempo; + updateTempo(); + } + } + _mutex.unlock(); + _aktTime &= 0xFFFF; +} + +} // End of namespace Sky |