cog/Audio/Plugin.h

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/*
Are defines really appropriate for this?
We want something easily insertable into a dictionary.
Maybe should extern these, and shove the instances in PluginController.m, but will that cause linking problems?
*/
#define kCogSource @"CogSource"
#define kCogDecoder @"CogDecoder"
#define kCogMetadataReader @"CogMetadataReader"
#define kCogPropertiesReader @"CogPropertiesReader"
@protocol CogPlugin <NSObject>
//Dictionary containing classname/plugintype pairs. ex: @"VorbisDecoder": kCogDecoder, @"VorbisPropertiesRaeder": kCogPropertiesReader
+ (NSDictionary *)pluginInfo;
@end
@protocol CogSource <NSObject>
+ (NSArray *)schemes; //http, file, etc
- (NSURL *)url;
- (BOOL)open:(NSURL *)url;
- (NSDictionary *)properties; //Perhaps contains header info for HTTP stream, or path for a regular file.
- (BOOL)seekable;
- (BOOL)seek:(long)position whence:(int)whence;
- (long)tell;
- (int)read:(void *)buffer amount:(int)amount; //reads UP TO amount, returns amount read.
- (void)close;
@end
@protocol CogDecoder <NSObject>
+ (NSArray *)fileTypes; //mp3, ogg, etc
//For KVO
//- (void)setProperties:(NSDictionary *)p;
- (NSDictionary *)properties;
- (BOOL)open:(id<CogSource>)source;
- (BOOL)seekable;
- (double)seekToTime:(double)time; //time is in milleseconds, should return the time actually seeked to.
- (int)fillBuffer:(void *)buf ofSize:(UInt32)size;
- (void)close;
@end
@protocol CogMetadataReader <NSObject>
+ (NSArray *)fileTypes;
+ (NSDictionary *)metadataForURL;
@end
@protocol CogPropertiesReader <NSObject>
+ (NSArray *)fileTypes;
+ (NSDictionary *)propertiesForSource:(id<CogSource>)source;
@end