Issue #94: Added a way for MIKMIDISequencer subclasses to modify pars…

…ed MIDI commands before they get sent to their destinations.

Source/MIKMIDISequencer.h

@@ -161,6 +161,23 @@ typedef NS_ENUM(NSInteger, MIKMIDISequencerClickTrackStatus) {
  */
 - (void)recordMIDICommand:(MIKMIDICommand *)command;
 
+/**
+ *	Allows subclasses to modify the MIDI commands that are about to be
+ *	scheduled with a destination endpoint.
+ *
+ *	@param commandsToBeScheduled An array of MIKMIDICommands that are about
+ *	to be scheduled.
+ *
+ *	@param endpoint The destination endpoint the commands will be sent to after
+ *	they are modified.
+ *
+ *	@note You should not call this method directly. It is made public solely to
+ *	give subclasses a chance to alter or override any MIDI commands parsed from the
+ *	MIDI sequence before they get sent to their destination endpoint.
+ *
+ */
+- (NSArray *)modifiedMIDICommandsFromCommandsToBeScheduled:(NSArray *)commandsToBeScheduled forEndpoint:(MIKMIDIDestinationEndpoint *)endpoint;
+
 #pragma mark - Configuration
 
 /**

Source/MIKMIDISequencer.m

@@ -401,12 +401,16 @@ - (void)updateClockWithMusicTimeStamp:(MusicTimeStamp)musicTimeStamp tempo:(Floa
 
 - (void)sendCommands:(NSArray *)commands toDestinationEndpoint:(MIKMIDIDestinationEndpoint *)endpoint
 {
+	commands = [self modifiedMIDICommandsFromCommandsToBeScheduled:commands forEndpoint:endpoint];
+
 	NSError *error;
 	if (commands.count && ![[MIKMIDIDeviceManager sharedDeviceManager] sendCommands:commands toEndpoint:endpoint error:&error]) {
 		NSLog(@"%@: An error occurred scheduling the commands %@ for destination endpoint %@. %@", NSStringFromClass([self class]), commands, endpoint, error);
 	}
 }
 
+- (NSArray *)modifiedMIDICommandsFromCommandsToBeScheduled:(NSArray *)commandsToBeScheduled forEndpoint:(MIKMIDIDestinationEndpoint *)endpoint { return commandsToBeScheduled; }
+
 #pragma mark - Recording
 
 - (void)startRecording