30 #import <Foundation/Foundation.h>
31 #import <AudioToolbox/AudioToolbox.h>
77 + (BOOL)infoForFileAtURL:(NSURL*)url audioDescription:(AudioStreamBasicDescription*)audioDescription lengthInFrames:(UInt32*)lengthInFrames error:(NSError**)error;
85 - (id)initWithFileURL:(NSURL*)url targetAudioDescription:(AudioStreamBasicDescription)audioDescription;
109 @property (nonatomic, readonly) UInt32 lengthInFrames;
114 @property (nonatomic, strong, readonly) NSError *error;