changed structure of musicdriver, added General Midi music support.

mapping table mt32->gm needs a lot of changes.

svn-id: r7273

1 files changed, 78 insertions, 0 deletions

diff --git a/sky/gmmusic.cpp b/sky/gmmusic.cpp
new file mode 100644
index 0000000000..2b0e5f45ad
--- /dev/null
+++ b/sky/gmmusic.cpp
@@ -0,0 +1,78 @@
+/* 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/gmmusic.h"
+
+void SkyGmMusic::passTimerFunc(void *param) {
+
+	((SkyGmMusic*)param)->timerCall();
+}
+
+SkyGmMusic::SkyGmMusic(MidiDriver *pMidiDrv, SkyDisk *pSkyDisk)
+	: SkyMusicBase(pSkyDisk) {
+
+	_driverFileBase = 60200;
+    _midiDrv = pMidiDrv;
+	int midiRes = _midiDrv->open();
+	if (midiRes != 0) {
+		printf("Error code: %d\n",midiRes);
+	}
+	_midiDrv->setTimerCallback(this, passTimerFunc);
+	ignoreNextPoll = false;
+}
+
+SkyGmMusic::~SkyGmMusic(void) {
+
+	_midiDrv->close();
+	_midiDrv->setTimerCallback(NULL, NULL);
+	delete _midiDrv;
+}
+
+void SkyGmMusic::timerCall(void) {
+
+	// midi driver polls hundred times per sec. We only want 50 times.
+	ignoreNextPoll = !ignoreNextPoll;
+	if (!ignoreNextPoll) return;
+
+	if (_musicData != NULL)
+		pollMusic();
+}
+
+void SkyGmMusic::setupPointers(void) {
+
+	_musicDataLoc = (_musicData[0x7DD] << 8) | _musicData[0x7DC];
+	_sysExSequence = ((_musicData[0x7E1] << 8) | _musicData[0x7E0]) + _musicData;
+}
+
+void SkyGmMusic::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);
+	}
+}
+
+void SkyGmMusic::startDriver(void) {
+
+	_midiDrv->send(0xFF);
+}