Patch #1048326 Better MT-32 support

svn-id: r15635

1 files changed, 135 insertions, 0 deletions

diff --git a/backends/midi/mt32/mt32.cpp b/backends/midi/mt32/mt32.cpp
new file mode 100644
index 0000000000..cb32b6e5e9
--- /dev/null
+++ b/backends/midi/mt32/mt32.cpp
@@ -0,0 +1,135 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001-2004 The ScummVM project
+ *
+ * YM2612 tone generation code written by Tomoaki Hayasaka.
+ * Used under the terms of the GNU General Public License.
+ * Adpated to ScummVM by Jamieson Christian.
+ *
+ * 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 "backends/midi/emumidi.h"
+
+#include "common/util.h"
+#include "common/file.h"
+
+#include "backends/midi/mt32/synth.h"
+
+class MidiDriver_MT32 : public MidiDriver_Emulated {
+private:
+	CSynthMT32 *_synth;
+
+	const char *rom_path;
+
+protected:
+	void generate_samples(int16 *buf, int len);
+
+public:
+	MidiDriver_MT32(SoundMixer *mixer, const char *path);
+	virtual ~MidiDriver_MT32();
+
+	int open();
+	void close();
+	void send(uint32 b);
+	uint32 property(int prop, uint32 param) { return 0; }
+
+	void setPitchBendRange(byte channel, uint range) { }
+	void sysEx(byte *msg, uint16 length);
+
+	MidiChannel *allocateChannel() { return 0; }
+	MidiChannel *getPercussionChannel() { return 0; }
+
+
+	// AudioStream API
+	bool isStereo() const { return true; }
+	int getRate() const { return 32000; }
+};
+
+
+////////////////////////////////////////
+//
+// MidiDriver_MT32
+//
+////////////////////////////////////////
+
+
+MidiDriver_MT32::MidiDriver_MT32(SoundMixer *mixer, const char *path)
+	: MidiDriver_Emulated(mixer) {
+	_synth = new CSynthMT32();
+	rom_path = path;
+	File::addDefaultDirectory(path);
+}
+
+MidiDriver_MT32::~MidiDriver_MT32() {
+	delete _synth;
+}
+
+int MidiDriver_MT32::open() {
+	SynthProperties prop;
+
+	if (_isOpen)
+		return MERR_ALREADY_OPEN;
+	
+	MidiDriver_Emulated::open();
+	
+	prop.SampleRate = getRate(); // 32000;
+	prop.UseReverb = true;
+	prop.UseDefault = true;
+	//prop.RevType = 0;
+	//prop.RevTime = 5;
+	//prop.RevLevel = 3;
+
+	_synth->ClassicOpen(rom_path, prop);
+
+	_mixer->setupPremix(this);
+
+	return 0;
+}
+
+void MidiDriver_MT32::send(uint32 b) {
+	_synth->PlayMsg(b);
+}
+
+void MidiDriver_MT32::sysEx(byte *msg, uint16 length) {
+	_synth->PlaySysex(msg, length);
+}
+
+void MidiDriver_MT32::close() {
+	if (!_isOpen)
+		return;
+	_isOpen = false;
+
+	// Detach the premix callback handler
+	_mixer->setupPremix(0);
+
+	_synth->Close();
+}
+
+void MidiDriver_MT32::generate_samples(int16 *data, int len) {
+	_synth->MT32_CallBack((Bit8u *)data, len, _mixer->getMusicVolume());
+}
+
+
+////////////////////////////////////////
+//
+// MidiDriver_MT32 factory
+//
+////////////////////////////////////////
+
+MidiDriver *MidiDriver_MT32_create(SoundMixer *mixer, const char *path) {
+	return new MidiDriver_MT32(mixer, path);
+}