How to convert .caf to .mp3 file programmatically on the iPhone or iPad?

is there a way to programmatically convert .caf audio files to .mp3 audio files on开发者_Python百科 the iPad platform?

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There is NO way to encode TO mp3 on the iPhone. Apple does not provide the encoders for mp3, presumably due to licensing.

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OSStatus AudioConverterFillComplexBuffer(

   AudioConverterRef                   inAudioConverter,      
   AudioConverterComplexInputDataProc  inInputDataProc,   
   void                                *inInputDataProcUserData,   
   UInt32                              *ioOutputDataPacketSize,  
   AudioBufferList                     *outOutputData,  
   AudioStreamPacketDescription        *outPacketDescription  
);

Still working on an implementation, but this method is meant to be used for this conversion.

It is declared in audiotoolbox -> audioConverter