SCI: Added a version of allNotesOff() which sends messages only to the channels used by the associated song instead of all channels

svn-id: r49673

2 files changed, 36 insertions, 0 deletions

diff --git a/engines/sci/sound/midiparser_sci.cpp b/engines/sci/sound/midiparser_sci.cpp
index bb353da780..c74a7eae11 100644
--- a/engines/sci/sound/midiparser_sci.cpp
+++ b/engines/sci/sound/midiparser_sci.cpp
@@ -325,6 +325,40 @@ void MidiParser_SCI::parseNextEvent(EventInfo &info) {
 	}// switch (info.command())
 }
 
+void MidiParser_SCI::allNotesOff() {
+	if (!_driver)
+		return;
+
+	int i, j;
+
+	// Turn off all active notes
+	for (i = 0; i < 128; ++i) {
+		for (j = 0; j < 16; ++j) {
+			if ((_active_notes[i] & (1 << j)) && isChannelUsed(j)){
+				_driver->send(0x80 | j, i, 0);
+			}
+		}
+	}
+
+	// Turn off all hanging notes
+	for (i = 0; i < ARRAYSIZE(_hanging_notes); i++) {
+		if (_hanging_notes[i].time_left) {
+			_driver->send(0x80 | _hanging_notes[i].channel, _hanging_notes[i].note, 0);
+			_hanging_notes[i].time_left = 0;
+		}
+	}
+	_hanging_notes_count = 0;
+
+	// To be sure, send an "All Note Off" event (but not all MIDI devices
+	// support this...).
+
+	for (i = 0; i < 16; ++i) {
+		if (isChannelUsed(i))
+			_driver->send(0xB0 | i, 0x7b, 0); // All notes off
+	}
+
+	memset(_active_notes, 0, sizeof(_active_notes));
+}
 
 byte MidiParser_SCI::midiGetNextChannel(long ticker) {
 	byte curr = 0xFF;
diff --git a/engines/sci/sound/midiparser_sci.h b/engines/sci/sound/midiparser_sci.h
index 8384c74cf6..80401460d2 100644
--- a/engines/sci/sound/midiparser_sci.h
+++ b/engines/sci/sound/midiparser_sci.h
@@ -71,6 +71,8 @@ public:
 			jumpToTick(0);
 	}
 
+	void allNotesOff();
+
 	void remapChannel(byte channel, byte newChannel) {
 		assert(channel < 0xF);		// don't touch special SCI channel 15
 		assert(newChannel < 0xF);	// don't touch special SCI channel 15