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// // AudioQueue.h // #import <Foundation/Foundation.h> #import <AudioToolbox/AudioToolbox.h> @protocol AudioQueueDelegate; @interface AudioQueue : NSObject { AudioQueueRef audioQueue; id<AudioQueueDelegate> delegate; AudioQueueBufferRef buffersHead; AudioQueueBufferRef buffersTail; } @property (nonatomic,retain) id<AudioQueueDelegate> delegate; - (id)initQueueWithDelegate:(id<AudioQueueDelegate>)delegate; /* * Sets the ASBD for this AudioQueue. See Core Audio documentation * for AudioQueueNewOutput and AudioQueueSetProperty for possible * return values. */ - (OSStatus)setAudioStreamBasicDescription:(AudioStreamBasicDescription)absd; /* * Sets the magic cookie for this audio queue. See Core Audio documentation * for AudioQueueSetProperty for possible return values. */ - (OSStatus)setMagicCookie:(NSData *)magicCookie; /* * Starts playback of the audio queue. See Core Audio documentation * for AudioQueueStart for possible return values. */ - (OSStatus)start; /* * Pauses playback of the audio queue. See Core Audio documentation * for AudioQueuePause for possible return values. */ - (OSStatus)pause; /* * Allocates a buffer for future queueing on this AudioQueue. * See Core Audio documentation for AudioQueueAllocateBufferWithPacketDescriptions * for possible return values; */ - (OSStatus)allocateBufferWithData:(NSData *)data packetCount:(UInt32)packetCount packetDescriptions:(AudioStreamPacketDescription *)packetDescriptions outBufferRef:(AudioQueueBufferRef *)outBufferRef; /* * Enqueues a buffer for future playback. See Core Audio documentation for * AudioQueueEnqueueBuffer for possible return values; */ - (OSStatus)enqueueBuffer:(AudioQueueBufferRef)bufferRef; /* * Notifies this AudioQueue that no more audio will be queued, and that * the AudioQueue should stop once the last currently queued buffer * is complete. See Core Audio documentation for AudioQueueFlush and * AudioStop for possible return values; */ - (OSStatus)endOfStream; @end @protocol AudioQueueDelegate<NSObject> /* * Notifies the delegate that the AudioQueue is done enqueueing a * buffer and the buffer may now be released. */ - (void)audioQueue:(AudioQueue *)audioQueue isDoneWithBuffer:(AudioQueueBufferRef)bufferRef; /* * Notifies the delegate that audio is now playing on this AudioQueue. */ - (void)audioQueuePlaybackIsStarting:(AudioQueue *)audioQueue; /* * Notifies the delegate that audio playback has finished * on this AudioQueue. */ - (void)audioQueuePlaybackIsComplete:(AudioQueue *)audioQueue; @end