Moved engines to the new engines/ directory

svn-id: r20582

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