Refactor music playing code

Sources/VLDocument.h

@@ -41,7 +41,7 @@ enum {
 	NSString *			songComposer;
 	NSString *			songArranger;
 	NSString *			songGroove;
-	NSNumber *			songTempo;
+	float               songTempo;
 	float				chordSize;
 	float				lyricSize;
 	float				staffSize;
@@ -65,6 +65,7 @@ enum {
 	float				baseTempo;
 }
 
+@property (nonatomic) float songTempo;
 @property (nonatomic) int playElements;
 
 - (VLSong *)	song;
@@ -83,11 +84,7 @@ enum {
 
 - (void) setRepeatVolta:(int)repeatVolta;
 
-- (IBAction) play:(id)sender;
+- (void) playSong;
-- (IBAction) stop:(id)sender;
-- (IBAction) playStop:(id)sender;
-- (IBAction) playMusic:(id)sender;
-- (IBAction) adjustTempo:(id)sender;
 
 - (NSURL *)    tmpURL;
 - (NSURL *)    workURL;

Sources/VLDocument.mm

@@ -68,7 +68,7 @@
 
 @implementation VLDocument
 
-@synthesize playElements;
+@synthesize songTempo, playElements;
 
 + (BOOL)autosavesInPlace
 {
@@ -87,7 +87,7 @@
 		songArranger		= @"";
 		songGroove			= @"Swing";
 		playElements		= kVLPlayAccompaniment|kVLPlayMelody|kVLPlayCountIn;
-		songTempo			= [[NSNumber alloc] initWithInt:120];
+		songTempo			= 120.0f;
 		baseTempo			= 120.0f;
 		chordSize			= 6.0f;
 		lyricSize			= 0.0f;
@@ -142,7 +142,7 @@
 
 - (void) dealloc
 {
-	VLSoundOut::Instance()->Stop();
+	VLSoundOut::Instance()->Stop(false);
 
 	delete song;
 
@@ -237,13 +237,12 @@
 	[self didChangeSong];
 }
 
-- (void) setSongTempo:(int)tempo
+- (void) setSongTempo:(float)tempo
 {
-	if (tempo == [songTempo intValue])
+	if (tempo == songTempo)
 		return;
 	
-	[songTempo autorelease];
+	songTempo = tempo;
-	songTempo = [[NSNumber numberWithInt:tempo] retain];
 	if (VLSoundOut::Instance()->Playing()) 
 		VLSoundOut::Instance()->SetPlayRate(playRate*tempo/baseTempo);
 }
@@ -466,7 +465,7 @@
 	return task;
 }
 
-- (IBAction) play:(id)sender
+- (void) playSong
 {
 	if (hasMusicSequence) {
 		VLSoundOut::Instance()->PlaySequence(NULL);
@@ -492,7 +491,7 @@
 	
 		hasMusicSequence 	= true;
 		[sheetWin willPlaySequence:music];
-		baseTempo			= [songTempo floatValue];
+		baseTempo			= songTempo;
 		VLSoundOut::Instance()->SetPlayRate(playRate);
 		VLSoundOut::Instance()->PlaySequence(music);
 	}
@@ -507,7 +506,7 @@
 	songGroove	   	 = groove;
 	previewRange	 = sections;
 	playElements	|= kVLPlayGroovePreview;
-	[self play:groove];
+	[self playSong];
 	playElements	&= ~kVLPlayGroovePreview;
 	songGroove		 = savedGroove;
 	[validTmpFiles removeObjectForKey:@"mma"]; 
@@ -515,49 +514,6 @@
 	hasMusicSequence = false;
 }
 
-- (IBAction) stop:(id)sender
-{
-	VLSoundOut::Instance()->Stop();
-}
-
-- (IBAction) playStop:(id)sender
-{	
-	if (VLSoundOut::Instance()->Playing()) {
-		[self stop:sender];
-        if ([sender isKindOfClass:[NSMenuItem class]]) {
-            [sender setTitle:@"Play"];
-        } else {
-            [sender setLabel:@"Play"];
-            [sender setImage:[NSImage imageNamed:@"play.icns"]];
-        }
-	} else {
-		[self play:sender];
-        if ([sender isKindOfClass:[NSMenuItem class]]) {
-            [sender setTitle:@"Stop"];
-        } else {
-            [sender setLabel:@"Stop"];
-            [sender setImage:[NSImage imageNamed:@"stop.icns"]];
-        }
-	}
-}
-
-- (IBAction) playMusic:(id)sender
-{
-	switch ([sender tag]) {
-	case 1: 	// Fwd
-        VLSoundOut::Instance()->Fwd();
-        break;
-	case -1:	// Rew
-		VLSoundOut::Instance()->Bck();
-		break;
-	}
-}
-
-- (IBAction) adjustTempo:(id)sender
-{
-	[self setSongTempo:[songTempo intValue]+[sender tag]];
-}
-
 - (NSPrintOperation *)printOperationWithSettings:(NSDictionary *)printSettings 
 										   error:(NSError **)outError 
 {

Sources/VLGrooveController.h

@@ -11,7 +11,7 @@
 #import <Cocoa/Cocoa.h>
 
 @class VLSheetView;
-@class VLDocument;
+@class VLSheetWindow;
 
 @interface VLGrooveController : NSWindowController {
 	NSDictionary * 			fGrooves;
@@ -24,7 +24,7 @@
 	NSArray *				fSubStyleList;
 	NSPredicate *			fSubStyleFilter;
 	VLSheetView *			fView;
-	VLDocument *			fDocument;
+	VLSheetWindow *			fSheetWin;
 }
 
 - (id) initWithSheetView:(VLSheetView *)view;

Sources/VLGrooveController.mm

@@ -5,12 +5,12 @@
 //
 //      (MN)    Matthias Neeracher
 //
-// Copyright © 2007 Matthias Neeracher
+// Copyright © 2007-2011 Matthias Neeracher
 //
 
 #import "VLGrooveController.h"
 #import "VLSheetView.h"
-#import "VLDocument.h"
+#import "VLSheetWindow.h"
 
 @implementation VLGrooveController
 
@@ -24,7 +24,7 @@
 			@"!(SELF matches[c] '.*(Intro|End)\\\\d*$')"]
 			retain];
 	fView		= view;
-	fDocument	= [view document];
+	fSheetWin	= (VLSheetWindow *)[view window];
 
 	[NSApp beginSheet: [self window]
 		   modalForWindow: [view window]
@@ -46,7 +46,7 @@
 	if ([sender state])
 		[fView playWithGroove:[[fBrowser selectedCellInColumn:1] stringValue]];
 	else
-		[fDocument stop:sender];
+		[fSheetWin stop:self];
 }
 
 - (IBAction)endSheet:(id)sender
@@ -56,7 +56,7 @@
 
 - (void)didEndSheet:(NSWindow *)sheet returnCode:(int)returnCode contextInfo:(void *)contextInfo
 {
-	[fDocument stop:self];
+	[fSheetWin stop:self];
 	if (returnCode == NSAlertFirstButtonReturn)
 		[fView setGroove:[[fBrowser selectedCellInColumn:1] stringValue]];
 		
@@ -119,7 +119,7 @@
 			    [fSubStyles objectForKey:@".DESC"],
 			    [fSubStyles objectForKey:
 				    [[fBrowser selectedCellInColumn:1] stringValue]]]];
-		[fDocument stop:self];
+		[fSheetWin stop:self];
 		[self togglePlay:fPlayButton];
 	} else
 		[fDescription setStringValue:[fSubStyles objectForKey:@".DESC"]];

Sources/VLMMADocument.mm

@@ -26,7 +26,7 @@
 		+ (const char *)[[bndl objectForInfoDictionaryKey:@"CFBundleVersion"]
 							UTF8String]
 		+ "\n\n";
-	sprintf(buf, "Tempo %d\n", [songTempo intValue]);
+	sprintf(buf, "Tempo %ld\n", lround(songTempo));
 	mmaFile	+= buf;
 	if (playElements & kVLPlayGroovePreview) {
 		//

Sources/VLPListDocument.mm

@@ -243,7 +243,7 @@ void VLPlistVisitor::VisitChord(VLChord & c)
 {
 	NSMutableDictionary *	plist = 
 		[NSMutableDictionary dictionaryWithObjectsAndKeys:
-		 songTitle, @"title", songTempo, @"tempo",
+		 songTitle, @"title", [NSNumber numberWithLong:lround(songTempo)], @"tempo",
 		 [NSString stringWithUTF8String:song->PrimaryGroove().c_str()], @"groove", 
 		 songComposer, @"composer", songLyricist, @"lyricist",
 		 [NSDate date], @"saved",

Sources/VLSheetView.h

@@ -120,6 +120,7 @@ enum VLCursorVisual {
 - (IBAction) editDisplayOptions:(id)sender;
 - (IBAction) transposeOctave:(id)sender;
 
+
 - (VLDocument *) document;
 - (VLSong *) song;
 - (NSImage *) musicElement:(VLMusicElement)elt;

Sources/VLSheetWindow.h

@@ -33,6 +33,8 @@
     IBOutlet NSProgressIndicator *  progressIndicator;
     IBOutlet VLLogWindow *          logWin;
 	IBOutlet VLPDFWindow *          pdfWin;
+    id                              soundStartObserver;
+    id                              soundStopObserver;
 
     
 	VLEditable *            editTarget;
@@ -46,6 +48,10 @@
 
 - (IBAction) togglePlayElements:(id)sender;
 - (IBAction) showOutput:(id)sender;
+- (IBAction) stop:(id)sender;
+- (IBAction) playStop:(id)sender;
+- (IBAction) playMusic:(id)sender;
+- (IBAction) adjustTempo:(id)sender;
 
 - (VLEditable *) editTarget;
 - (void) setEditTarget:(VLEditable *)editable;

Sources/VLSheetWindow.mm

@@ -12,6 +12,7 @@
 #import "VLDocument.h"
 #import "VLPDFWindow.h"
 #import "VLLogWindow.h"
+#import "VLSoundOut.h"
 
 @implementation VLEditable
 
@@ -51,10 +52,27 @@
 {
 	if (self = [super initWithWindow:window]) {
 		editTarget			= nil;
+        NSNotificationCenter * nc   = [NSNotificationCenter defaultCenter];
+        NSOperationQueue *     oq   = [NSOperationQueue mainQueue];
+        soundStartObserver          = [nc addObserverForName:(NSString*)kVLSoundStartedNotification 
+                                                      object:nil queue:oq usingBlock:^(NSNotification *note) {
+            [[[self window] contentView] setNeedsDisplay:YES];
+        }];
+        soundStopObserver           = [nc addObserverForName:(NSString*)kVLSoundStoppedNotification 
+                                                      object:nil queue:oq usingBlock:^(NSNotification *note) {
+            [[[self window] contentView] setNeedsDisplay:YES];
+        }];
 	}
 	return self;
 }
 
+- (void) dealloc
+{
+    NSNotificationCenter * nc   = [NSNotificationCenter defaultCenter];
+    [nc removeObserver:soundStartObserver];
+    [nc removeObserver:soundStopObserver];
+}
+
 - (VLEditable *)editTarget
 {
 	return editTarget;
@@ -100,11 +118,25 @@
 	[[self document] setPlayElements:[[self document] playElements] ^ [sender tag]];
 }
 
-- (BOOL) validateMenuItem:(NSMenuItem *)menuItem
+- (BOOL) validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)item
 {
-	if ([menuItem action] == @selector(togglePlayElements:))
+	if ([item action] == @selector(togglePlayElements:)) {
-		if (int tag = [menuItem tag])
+        NSMenuItem * menuItem = (NSMenuItem *)item;
+		if (int tag = [item tag])
 			[menuItem setState:([[self document] playElements] & tag) != 0];
+    } else if ([item action] == @selector(playStop:)) {
+        NSMenuItem *    menuItem = [(NSObject *)item isKindOfClass:[NSMenuItem class]] ? (NSMenuItem *)item : nil;
+        NSToolbarItem * toolItem = menuItem ? nil : (NSToolbarItem *)item;
+        if (VLSoundOut::Instance()->Playing()) {
+            [menuItem setTitle:@"Stop"];
+            [toolItem setLabel:@"Stop"];
+            [toolItem setImage:[NSImage imageNamed:@"stop.icns"]];
+        } else {
+            [menuItem setTitle:@"Play"];
+            [toolItem setLabel:@"Play"];
+            [toolItem setImage:[NSImage imageNamed:@"play.icns"]];
+        }
+    }
     
 	return YES;
 }
@@ -127,4 +159,35 @@
 	[pdfWin reloadPDF];
 }
 
+- (IBAction) stop:(id)sender
+{
+    VLSoundOut::Instance()->Stop();
+}
+
+- (IBAction) playStop:(id)sender
+{	
+	if (VLSoundOut::Instance()->Playing()) 
+        [self stop:sender];
+    else
+        [[self document] playSong];
+}
+
+- (IBAction) playMusic:(id)sender
+{
+	switch ([sender tag]) {
+    case 1: 	// Fwd
+        VLSoundOut::Instance()->Fwd();
+        break;
+    case -1:	// Rew
+        VLSoundOut::Instance()->Bck();
+        break;
+	}
+}
+
+- (IBAction) adjustTempo:(id)sender
+{
+	[[self document] setSongTempo:[[self document] songTempo]+[sender tag]];
+}
+
+
 @end

Sources/VLSoundOut.cpp

@@ -5,7 +5,7 @@
 //
 //      (MN)    Matthias Neeracher
 //
-// Copyright © 2005-2007 Matthias Neeracher
+// Copyright © 2005-2011 Matthias Neeracher
 //
 
 #include "VLSoundOut.h"
@@ -21,6 +21,9 @@
 
 #define R(x) if (OSStatus r = (x)) fprintf(stderr, "%s -> %d\n", #x, r);
 
+CFStringRef  kVLSoundStartedNotification    =   CFSTR("VLSoundStarted");
+CFStringRef  kVLSoundStoppedNotification    =   CFSTR("VLSoundStopped");
+
 class VLAUSoundOut : public VLSoundOut {
 public:
 	VLAUSoundOut();
@@ -36,6 +39,7 @@ public:
 	virtual void 	Bck();
 	
 	virtual 	   ~VLAUSoundOut();
+    void            PollMusic();
 protected:
 	VLAUSoundOut(bool fileOutput);
 
@@ -51,6 +55,7 @@ private:
 	MusicTimeStamp      fMusicLength;
 	bool                fRunning;
 	bool                fForward;
+    dispatch_source_t   fMusicPoll;
 
 	void                Play(const int8_t * note, size_t numNotes = 1);
 };
@@ -119,6 +124,12 @@ VLAUSoundOut::VLAUSoundOut()
 	: fMusic(0), fRunning(false), fForward(true)
 {
 	InitSoundOutput(false);
+    fMusicPoll = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_get_main_queue());
+    dispatch_source_set_event_handler(fMusicPoll, ^{
+        this->PollMusic();
+    });
+    dispatch_source_set_timer(fMusicPoll, DISPATCH_TIME_FOREVER, INT64_MAX, 1000*NSEC_PER_USEC);
+    dispatch_resume(fMusicPoll);
 }
 
 VLAUSoundOut::VLAUSoundOut(bool)
@@ -128,8 +139,9 @@ VLAUSoundOut::VLAUSoundOut(bool)
 
 VLAUSoundOut::~VLAUSoundOut()
 {
-	DisposeMusicPlayer(fPlayer);
 	Stop(false);
+    dispatch_release(fMusicPoll);
+	DisposeMusicPlayer(fPlayer);
 	DisposeAUGraph(fGraph);
 }
 
@@ -205,6 +217,9 @@ void VLAUSoundOut::PlaySequence(MusicSequence music)
 	R(MusicPlayerStart(fPlayer));
 
 	fRunning	= true;
+    CFNotificationCenterPostNotification(CFNotificationCenterGetLocalCenter(), kVLSoundStartedNotification, 
+                                         NULL, NULL, false);
+    dispatch_source_set_timer(fMusicPoll, DISPATCH_TIME_NOW, 500*NSEC_PER_MSEC, 200*NSEC_PER_MSEC);
 }
 
 void VLAUSoundOut::SetPlayRate(float rate)
@@ -266,6 +281,9 @@ void VLAUSoundOut::Stop(bool pause)
 		DisposeMusicSequence(fMusic);
 		fMusic = 0;
 	}
+    CFNotificationCenterPostNotification(CFNotificationCenterGetLocalCenter(), kVLSoundStoppedNotification, 
+                                         NULL, NULL, false);
+    dispatch_source_set_timer(fMusicPoll, DISPATCH_TIME_FOREVER, INT64_MAX, 200*NSEC_PER_MSEC);
 }
 
 bool VLAUSoundOut::Playing()
@@ -280,6 +298,14 @@ bool VLAUSoundOut::AtEnd()
 	return !MusicPlayerGetTime(fPlayer, &time) && time >= fMusicLength;
 }
 
+void VLAUSoundOut::PollMusic()
+{
+    if (fRunning && AtEnd()) {
+        MusicPlayerSetTime(fPlayer, 0); 
+        Stop(true);
+    }
+}
+
 void VLAUSoundOut::PlayNote(const VLNote & note)
 {
 	Play(&note.fPitch);

Sources/VLSoundOut.h

@@ -5,13 +5,16 @@
 //
 //      (MN)    Matthias Neeracher
 //
-// Copyright © 2005-2008 Matthias Neeracher
+// Copyright © 2005-2011 Matthias Neeracher
 //
 
 #include "VLModel.h"
 #import <CoreFoundation/CoreFoundation.h>
 #include <AudioToolbox/AudioToolbox.h>
 
+extern CFStringRef  kVLSoundStartedNotification;
+extern CFStringRef  kVLSoundStoppedNotification;
+
 class VLSoundEvent {
 protected:
 	VLSoundEvent() {}