changed structure of musicdriver, added General Midi music support.

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

svn-id: r7273

1 files changed, 75 insertions, 0 deletions

diff --git a/sky/gmchannel.h b/sky/gmchannel.h
new file mode 100644
index 0000000000..1f5edede12
--- /dev/null
+++ b/sky/gmchannel.h
@@ -0,0 +1,75 @@
+/* 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.
+ *
+ * $Header$
+ *
+ */
+
+#ifndef SKYGMCHANNEL_H
+#define SKYGMCHANNEL_H
+
+#include "stdafx.h"
+#include "sound/mididrv.h"
+#include "common/engine.h"
+#include "sky/musicbase.h"
+
+typedef struct {
+	uint16 eventDataPtr;
+	int32 nextEventTime;
+	uint16 startOfData;
+	uint8 midiChannelNumber;
+	uint8 note;
+	uint8 channelActive;
+} MidiChannelType;
+
+class SkyGmChannel : public SkyChannelBase {
+public:
+	SkyGmChannel(uint8 *pMusicData, uint16 startOfData, MidiDriver *pMidiDrv);
+	virtual void stopNote(void);
+	virtual uint8 process(uint16 aktTime);
+	virtual void updateVolume(uint16 pVolume);
+private:
+	static const byte _mt32_to_gm[128];
+	MidiDriver *_midiDrv;
+	uint8 *_musicData;
+	uint16 _musicVolume;
+	MidiChannelType _channelData;
+	//-                          normal subs
+	void setRegister(uint8 regNum, uint8 value);
+	int32 getNextEventTime(void);
+	uint16 getNextNote(uint8 param);
+	void adlibSetupInstrument(void);
+	void setupInstrument(uint8 opcode);
+	void setupChannelVolume(uint8 volume);
+    //-                          Streamfunctions from Command90hTable
+	void com90_caseNoteOff(void);        // 0
+	void com90_stopChannel(void);        // 1
+	void com90_setupInstrument(void);    // 2
+	uint8 com90_updateTempo(void);       // 3
+	//void com90_dummy(void);            // 4
+	void com90_getPitch(void);           // 5
+	void com90_getChannelVolume(void);   // 6
+	//void com90_skipTremoVibro(void);   // 7
+	void com90_rewindMusic(void);        // 8
+	void com90_keyOff(void);             // 9
+	//void com90_error(void);            // 10
+	void com90_getChannelPanValue(void); // 11
+	void com90_setStartOfData(void);     // 12
+	void com90_getChannelControl(void);     // 13
+};
+
+#endif //SKYGMCHANNEL_H