cog/Application/PlaybackController.m

#import "PlaybackController.h"
#import "PlaylistView.h"

#import "CogAudio/Status.h"

#import "PlaylistController.h"
#import "PlaylistEntry.h"

@implementation PlaybackController

- (id)init
{
	self = [super init];
	if (self)
	{
		[self initDefaults];
	
		audioPlayer = [[AudioPlayer alloc] init];
		[audioPlayer setDelegate:self];
		playbackStatus = kCogStatusStopped;
		
		showTimeRemaining = NO;
		
		scrobbler = [[AudioScrobbler alloc] init];
		[GrowlApplicationBridge setGrowlDelegate:self];
	}
	
	return self;
}

- (void)initDefaults
{
	NSDictionary *defaultsDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
		[NSNumber numberWithBool:YES], @"enableAudioScrobbler",
		[NSNumber numberWithBool:NO],  @"automaticallyLaunchLastFM",
		nil];
		
	[[NSUserDefaults standardUserDefaults] registerDefaults:defaultsDictionary];
}

- (NSDictionary *) registrationDictionaryForGrowl
{
	NSArray *notifications = [NSArray arrayWithObjects:@"Stream Changed", nil];
	
	return [NSDictionary dictionaryWithObjectsAndKeys:
		@"Cog", GROWL_APP_NAME,  
		notifications, GROWL_NOTIFICATIONS_ALL, 
		notifications, GROWL_NOTIFICATIONS_DEFAULT,
		nil];
}

- (void)awakeFromNib
{
	currentVolume = 100.0;
	[volumeSlider setDoubleValue:pow(10.0, log10(0.5)/4.0)*[volumeSlider maxValue]];
	[positionSlider setEnabled:NO];
}
	
- (IBAction)playPauseResume:(id)sender
{
	if (playbackStatus == kCogStatusStopped)
		[self play:self];
	else
		[self pauseResume:self];
}

- (IBAction)pauseResume:(id)sender
{
	if (playbackStatus == kCogStatusPaused)
		[self resume:self];
	else
		[self pause:self];
}

- (IBAction)pause:(id)sender
{
	[audioPlayer pause];
	
	if([[NSUserDefaults standardUserDefaults] boolForKey:@"enableAudioScrobbler"]) {
		[scrobbler pause];
	}
}

- (IBAction)resume:(id)sender
{
	[audioPlayer resume];

	
	if([[NSUserDefaults standardUserDefaults] boolForKey:@"enableAudioScrobbler"]) {
		[scrobbler resume];
	}
}

- (IBAction)stop:(id)sender
{
	[audioPlayer stop];

	if([[NSUserDefaults standardUserDefaults] boolForKey:@"enableAudioScrobbler"]) {
		[scrobbler stop];
	}

}

//called by double-clicking on table
- (void)playEntryAtIndex:(int)i
{
	PlaylistEntry *pe = [[playlistController arrangedObjects] objectAtIndex:i];

	[self playEntry:pe];
}

- (IBAction)play:(id)sender
{
	if ([playlistView selectedRow] == -1)
		[playlistView selectRow:0 byExtendingSelection:NO];
	
	[self playEntryAtIndex:[playlistView selectedRow]];
}

- (void)playEntry:(PlaylistEntry *)pe
{
	if (playbackStatus != kCogStatusStopped)
		[self stop:self];
	
	[playlistController setCurrentEntry:pe];

	[positionSlider setDoubleValue:0.0f];
	
	[self updateTimeField:0.0f];
	
	[audioPlayer play:[pe url] withUserInfo:pe];
	[audioPlayer setVolume:currentVolume];
	
	if([[NSUserDefaults standardUserDefaults] boolForKey:@"enableAudioScrobbler"]) {
		[scrobbler start:pe];
	}

	[GrowlApplicationBridge notifyWithTitle:[pe title]
								description:[pe artist]
						   notificationName:@"Stream Changed"
								   iconData:nil
								   priority:0 
								   isSticky:NO 
							   clickContext:nil];
}

- (IBAction)next:(id)sender
{
	if ([playlistController next] == NO)
		return;

	[self stop:self];
	[self playEntry:[playlistController currentEntry]];
}

- (IBAction)prev:(id)sender
{
	if ([playlistController prev] == nil)
		return;

	[self stop:self];
	[self playEntry:[playlistController currentEntry]];
}

- (IBAction)seek:(id)sender
{
	double time;
	time = [positionSlider doubleValue];

	if ([sender tracking] == NO) // check if user stopped sliding  before playing audio
        [audioPlayer seekToTime:time];
	
	[self updateTimeField:time];
}

- (void)changePlayButtonImage:(NSString *)name
{
	NSImage *img = [NSImage imageNamed:[name stringByAppendingString:@"_gray"]];
	NSImage *alt = [NSImage imageNamed:[name stringByAppendingString:@"_blue"]];
	[img retain];
	[alt retain];
	if (img == nil)
	{
		NSLog(@"Error loading image!");
	}
	if (alt == nil)
	{
		NSLog(@"Error loading alt image...");
	}
	
	[playButton setImage:img];
	[playButton setAlternateImage:alt];
}

- (IBAction)changeVolume:(id)sender
{
	double percent;
	
	//Approximated log
	percent = (float)[sender doubleValue]/[sender maxValue];
	percent = percent * percent * percent * percent;

	//gravitates at the 100% mark
	float v = [sender frame].size.width - ([sender frame].size.width*(percent*[sender maxValue])/100.0);
	if (fabs(v) < 10.0)
	{
		percent = 0.5;
		v = pow(10.0, log10(percent)/4.0);
		[sender setDoubleValue:v*[sender maxValue]];
	}
	
	currentVolume = percent * [sender maxValue];
	
	[audioPlayer  setVolume:currentVolume];
}

- (IBAction)volumeDown:(id)sender
{
	double percent;
	
	[volumeSlider setDoubleValue:([volumeSlider doubleValue] - 5)];
	
	percent = (float)[volumeSlider doubleValue]/[volumeSlider maxValue];
	percent = percent * percent * percent * percent;
	
	currentVolume = percent * [volumeSlider maxValue];
	
	[audioPlayer  setVolume:currentVolume];
}

- (IBAction)volumeUp:(id)sender
{
	double percent;
	
	[volumeSlider setDoubleValue:([volumeSlider doubleValue] + 5)];
	
	percent = (float)[volumeSlider doubleValue]/[volumeSlider maxValue];
	percent = percent * percent * percent * percent;
	
	currentVolume = percent * [volumeSlider maxValue];
	
	[audioPlayer  setVolume:currentVolume];
}


- (void)updateTimeField:(double)pos
{
	NSString *text;
	if (showTimeRemaining == NO)
	{
		int sec = (int)(pos/1000.0);
		text = [NSString stringWithFormat:NSLocalizedString(@"TimeElapsed", @""), sec/60, sec%60];
	}
	else
	{
		int sec = (int)(([positionSlider maxValue] - pos)/1000.0);
		if (sec < 0)
			sec = 0;
		text = [NSString stringWithFormat:NSLocalizedString(@"TimeRemaining", @""), sec/60, sec%60];
	}
	[timeField setStringValue:text];
}	

- (IBAction)toggleShowTimeRemaining:(id)sender
{
	showTimeRemaining = !showTimeRemaining;

	[self updateTimeField:[positionSlider doubleValue]];
}

- (void)audioPlayer:(AudioPlayer *)player requestNextStream:(id)userInfo
{
	PlaylistEntry *curEntry = (PlaylistEntry *)userInfo;
	PlaylistEntry *pe = [playlistController getNextEntry:curEntry];

	[player setNextStream:[pe url] withUserInfo:pe];
}

- (void)audioPlayer:(AudioPlayer *)player streamChanged:(id)userInfo
{
	PlaylistEntry *pe = (PlaylistEntry *)userInfo;
	
	[playlistController setCurrentEntry:pe];
	
	[positionSlider setDoubleValue:0.0f];

	[self updateTimeField:0.0f];
	
	if([[NSUserDefaults standardUserDefaults] boolForKey:@"enableAudioScrobbler"]) {
		[scrobbler start:pe];
	}

	[GrowlApplicationBridge notifyWithTitle:[pe title]
								description:[pe artist]
						   notificationName:@"Stream Changed"
								   iconData:nil
								   priority:0 
								   isSticky:NO 
							   clickContext:nil];
}

- (void)updatePosition:(id)sender
{
	double pos = [audioPlayer amountPlayed];

	if ([positionSlider tracking] == NO)
	{
		[positionSlider setDoubleValue:pos];
		[self updateTimeField:pos];
	}
	
}


- (void)audioPlayer:(AudioPlayer *)player statusChanged:(id)s
{
	int status = [s intValue];
	if (status == kCogStatusStopped || status == kCogStatusPaused)
	{
		if (positionTimer)
		{
			[positionTimer invalidate];
			positionTimer = NULL;
		}
		if (status == kCogStatusStopped)
		{
			[positionSlider setDoubleValue:0.0f];
			
			[self updateTimeField:0.0f];			
		}
		
		//Show play image
		[self changePlayButtonImage:@"play"];
	}
	else if (status == kCogStatusPlaying)
	{
		if (!positionTimer)
			positionTimer = [NSTimer scheduledTimerWithTimeInterval:1.00 target:self selector:@selector(updatePosition:) userInfo:nil repeats:YES];

		//Show pause
		[self changePlayButtonImage:@"pause"];
	}
	
	if (status == kCogStatusStopped) {
		[positionSlider setEnabled:NO];
	}
	else {
		[positionSlider setEnabled:[[[playlistController currentEntry] seekable] boolValue]];
	}
	
	playbackStatus = status;
}

@end