220 lines
5.5 KiB
Objective-C
220 lines
5.5 KiB
Objective-C
//
|
|
// CogPluginMulti.m
|
|
// CogAudio
|
|
//
|
|
// Created by Christopher Snowhill on 10/21/13.
|
|
//
|
|
//
|
|
|
|
#import "CogPluginMulti.h"
|
|
|
|
NSArray *sortClassesByPriority(NSArray *theClasses) {
|
|
NSMutableArray *sortedClasses = [NSMutableArray arrayWithArray:theClasses];
|
|
[sortedClasses sortUsingComparator:
|
|
^NSComparisonResult(id obj1, id obj2) {
|
|
NSString *classString1 = (NSString *)obj1;
|
|
NSString *classString2 = (NSString *)obj2;
|
|
|
|
Class class1 = NSClassFromString(classString1);
|
|
Class class2 = NSClassFromString(classString2);
|
|
|
|
float priority1 = [class1 priority];
|
|
float priority2 = [class2 priority];
|
|
|
|
if(priority1 == priority2)
|
|
return NSOrderedSame;
|
|
else if(priority1 > priority2)
|
|
return NSOrderedAscending;
|
|
else
|
|
return NSOrderedDescending;
|
|
}];
|
|
return sortedClasses;
|
|
}
|
|
|
|
@interface CogDecoderMulti (Private)
|
|
- (void)registerObservers;
|
|
- (void)removeObservers;
|
|
- (void)observeValueForKeyPath:(NSString *)keyPath
|
|
ofObject:(id)object
|
|
change:(NSDictionary *)change
|
|
context:(void *)context;
|
|
@end
|
|
|
|
@implementation CogDecoderMulti
|
|
|
|
static void *kCogDecoderMultiContext = &kCogDecoderMultiContext;
|
|
|
|
+ (NSArray *)mimeTypes {
|
|
return nil;
|
|
}
|
|
|
|
+ (NSArray *)fileTypes {
|
|
return nil;
|
|
}
|
|
|
|
+ (float)priority {
|
|
return -1.0;
|
|
}
|
|
|
|
+ (NSArray *)fileTypeAssociations {
|
|
return nil;
|
|
}
|
|
|
|
- (id)initWithDecoders:(NSArray *)decoders {
|
|
self = [super init];
|
|
if(self) {
|
|
theDecoders = sortClassesByPriority(decoders);
|
|
theDecoder = nil;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
- (NSDictionary *)properties {
|
|
if(theDecoder != nil) return [theDecoder properties];
|
|
return nil;
|
|
}
|
|
|
|
- (NSDictionary *)metadata {
|
|
if(theDecoder != nil) return [theDecoder metadata];
|
|
return @{};
|
|
}
|
|
|
|
- (AudioChunk *)readAudio {
|
|
if(theDecoder != nil) return [theDecoder readAudio];
|
|
return nil;
|
|
}
|
|
|
|
- (BOOL)open:(id<CogSource>)source {
|
|
for(NSString *classString in theDecoders) {
|
|
Class decoder = NSClassFromString(classString);
|
|
theDecoder = [[decoder alloc] init];
|
|
[self registerObservers];
|
|
if([theDecoder open:source])
|
|
return YES;
|
|
[self removeObservers];
|
|
// HTTP reader supports limited rewinding
|
|
[source seek:0 whence:SEEK_SET];
|
|
}
|
|
theDecoder = nil;
|
|
return NO;
|
|
}
|
|
|
|
- (long)seek:(long)frame {
|
|
if(theDecoder != nil) return [theDecoder seek:frame];
|
|
return -1;
|
|
}
|
|
|
|
- (void)close {
|
|
if(theDecoder != nil) {
|
|
[self removeObservers];
|
|
[theDecoder close];
|
|
theDecoder = nil;
|
|
}
|
|
}
|
|
|
|
- (void)dealloc {
|
|
[self close];
|
|
}
|
|
|
|
- (void)registerObservers {
|
|
if(!observersAdded) {
|
|
[theDecoder addObserver:self
|
|
forKeyPath:@"properties"
|
|
options:(NSKeyValueObservingOptionNew)
|
|
context:kCogDecoderMultiContext];
|
|
|
|
[theDecoder addObserver:self
|
|
forKeyPath:@"metadata"
|
|
options:(NSKeyValueObservingOptionNew)
|
|
context:kCogDecoderMultiContext];
|
|
observersAdded = YES;
|
|
}
|
|
}
|
|
|
|
- (void)removeObservers {
|
|
if(observersAdded) {
|
|
observersAdded = NO;
|
|
[theDecoder removeObserver:self forKeyPath:@"properties" context:kCogDecoderMultiContext];
|
|
[theDecoder removeObserver:self forKeyPath:@"metadata" context:kCogDecoderMultiContext];
|
|
}
|
|
}
|
|
|
|
- (BOOL)setTrack:(NSURL *)track {
|
|
if(theDecoder != nil && [theDecoder respondsToSelector:@selector(setTrack:)]) return [theDecoder setTrack:track];
|
|
return NO;
|
|
}
|
|
|
|
- (void)observeValueForKeyPath:(NSString *)keyPath
|
|
ofObject:(id)object
|
|
change:(NSDictionary *)change
|
|
context:(void *)context {
|
|
if(context == kCogDecoderMultiContext) {
|
|
[self willChangeValueForKey:keyPath];
|
|
[self didChangeValueForKey:keyPath];
|
|
} else {
|
|
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
|
|
}
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation CogContainerMulti
|
|
|
|
+ (NSArray *)urlsForContainerURL:(NSURL *)url containers:(NSArray *)containers {
|
|
NSArray *sortedContainers = sortClassesByPriority(containers);
|
|
for(NSString *classString in sortedContainers) {
|
|
Class container = NSClassFromString(classString);
|
|
NSArray *urls = [container urlsForContainerURL:url];
|
|
if([urls count])
|
|
return urls;
|
|
}
|
|
return nil;
|
|
}
|
|
|
|
+ (NSArray *)dependencyUrlsForContainerURL:(NSURL *)url containers:(NSArray *)containers {
|
|
NSArray *sortedContainers = sortClassesByPriority(containers);
|
|
for(NSString *classString in sortedContainers) {
|
|
Class container = NSClassFromString(classString);
|
|
if([container respondsToSelector:@selector(dependencyUrlsForContainerURL:)]) {
|
|
NSArray *urls = [container dependencyUrlsForContainerURL:url];
|
|
if([urls count])
|
|
return urls;
|
|
}
|
|
}
|
|
return nil;
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation CogMetadataReaderMulti
|
|
|
|
+ (NSDictionary *)metadataForURL:(NSURL *)url readers:(NSArray *)readers {
|
|
NSArray *sortedReaders = sortClassesByPriority(readers);
|
|
for(NSString *classString in sortedReaders) {
|
|
Class reader = NSClassFromString(classString);
|
|
NSDictionary *data = [reader metadataForURL:url];
|
|
if([data count])
|
|
return data;
|
|
}
|
|
return nil;
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation CogPropertiesReaderMulti
|
|
|
|
+ (NSDictionary *)propertiesForSource:(id<CogSource>)source readers:(NSArray *)readers {
|
|
NSArray *sortedReaders = sortClassesByPriority(readers);
|
|
for(NSString *classString in sortedReaders) {
|
|
Class reader = NSClassFromString(classString);
|
|
NSDictionary *data = [reader propertiesForSource:source];
|
|
if([data count])
|
|
return data;
|
|
if([source seekable])
|
|
[source seek:0 whence:SEEK_SET];
|
|
}
|
|
return nil;
|
|
}
|
|
|
|
@end
|