Add decoder open error indicator

When decoder is redirected to the internal silence decoder, show an icon
on the playlist indicating a playback error.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>

Application/PlaybackController.m

@@ -768,6 +768,11 @@ NSDictionary *makeRGInfo(PlaylistEntry *pe) {
 	[[NSNotificationCenter defaultCenter] postNotificationName:CogPlaybackDidBeginNotficiation object:pe];
 }
 
+- (void)audioPlayer:(AudioPlayer *)player setError:(NSNumber *)status toTrack:(id)userInfo {
+	PlaylistEntry *pe = (PlaylistEntry *)userInfo;
+	[pe setError:[status boolValue]];
+}
+
 - (void)removeHDCD:(id)sender {
 	MainWindow *mainWindow = (MainWindow *)appController.mainWindow;
 	[mainWindow showHDCDLogo:NO];

Audio/AudioPlayer.h

@@ -127,4 +127,5 @@
 - (void)audioPlayer:(AudioPlayer *)player sustainHDCD:(id)userInfo;
 - (void)audioPlayer:(AudioPlayer *)player restartPlaybackAtCurrentPosition:(id)userInfo;
 - (void)audioPlayer:(AudioPlayer *)player pushInfo:(NSDictionary *)info toTrack:(id)userInfo;
+- (void)audioPlayer:(AudioPlayer *)player setError:(NSNumber *)status toTrack:(id)userInfo;
 @end

Audio/AudioPlayer.m

@@ -492,6 +492,10 @@
 	[self sendDelegateMethod:@selector(audioPlayer:sustainHDCD:) withObject:[bufferChain userInfo] waitUntilDone:NO];
 }
 
+- (void)setError:(BOOL)status {
+	[self sendDelegateMethod:@selector(audioPlayer:setError:toTrack:) withObject:[NSNumber numberWithBool:status] withObject:[bufferChain userInfo] waitUntilDone:NO];
+}
+
 - (void)setPlaybackStatus:(int)status {
 	[self setPlaybackStatus:status waitUntilDone:NO];
 }

Audio/Chain/BufferChain.h

@@ -79,4 +79,6 @@
 
 - (void)pushInfo:(NSDictionary *)info;
 
+- (void)setError:(BOOL)status;
+
 @end

Audio/Chain/BufferChain.m

@@ -268,4 +268,8 @@
 	[controller pushInfo:info];
 }
 
+- (void)setError:(BOOL)status {
+	[controller setError:status];
+}
+
 @end

Audio/Chain/InputNode.m

@@ -139,6 +139,16 @@
 	BOOL shouldClose = YES;
 	BOOL seekError = NO;
 
+	BOOL isError = NO;
+
+	if([decoder respondsToSelector:@selector(isSilence)]) {
+		if([decoder isSilence]) {
+			isError = YES;
+		}
+	}
+
+	[controller setError:isError];
+
 	while([self shouldContinue] == YES && [self endOfStream] == NO) {
 		if(shouldSeek == YES) {
 			BufferChain *bufferChain = [[controller controller] bufferChain];
@@ -159,6 +169,10 @@
 			shouldSeek = NO;
 			DLog(@"Seeked! Resetting Buffer");
 			initialBufferFilled = NO;
+
+			if(seekError) {
+				[controller setError:YES];
+			}
 		}
 
 		if(amountInBuffer < CHUNK_SIZE) {

Audio/Plugin.h

@@ -53,6 +53,8 @@
 // These are in NSObject, so as long as you are a subclass of that, you are ok.
 - (void)addObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath options:(NSKeyValueObservingOptions)options context:(void *)context;
 - (void)removeObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath;
+
+- (BOOL)isSilence;
 @end
 
 @protocol CogMetadataReader <NSObject>

Plugins/APL/APLDecoder.m

@@ -122,4 +122,10 @@
 	return n;
 }
 
+- (BOOL)isSilence {
+	if([decoder respondsToSelector:@selector(isSilence)])
+		return [decoder isSilence];
+	return NO;
+}
+
 @end

Plugins/CueSheet/CueSheetDecoder.m

@@ -295,4 +295,10 @@
 	return n;
 }
 
+- (BOOL)isSilence {
+	if([decoder respondsToSelector:@selector(isSilence)])
+		return [decoder isSilence];
+	return NO;
+}
+
 @end

Plugins/SilenceDecoder/SilenceDecoder/SilenceDecoder.m

@@ -85,6 +85,10 @@ enum { channels = 2 };
 	return source;
 }
 
+- (BOOL)isSilence {
+	return YES;
+}
+
 + (NSArray *)fileTypes {
 	return @[];
 }