cocoa - Storing AudioBufferLists from the ExtAudioFile API for later use -

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After using the Xcode / Cocoa and ExtAudioFile API, I am trying to remove the objectbuffer list * object for later use, but I am having trouble accessing the data again. This object repeated repeats ExtAudioFileRead calls Coming from.

I realize that I can not only bring these audiobilist * objects to NSAA, but I had the impression that an NSPointerArray would work for this purpose. However, when audio buffer list-> ambufers [0] .mditta attempts to access audio buffer lists after accumulating in NSPIeter arrays, they only come out of zero.

I was recalling the Audiobuffer list to the Audiobuff list because I am reusing the same audio buffer list for each ExtAudioFileRead call. I'm not sure that this is enough, though, and remembering the ZERO * AUDIOBOOFER-LIST-> MBAFFER [0]. The MDAATA object is not helping either.

What is the easiest way to store these audio buffer lists * objects? Am I on the right track?

Audiobufer lists keep your data in audioBufferList.mBuffers [i] .mData < / Code>. mData is zero * and the actual type of value is determined by the output format you specify.

Example: If you have defined kAudioFormatFlagsCanonical , kAudioFormatLinearPCM ,
mBitsPerChannel = 32 and mFramesPerPacket = 1
As your output format, the mData-array type value is AudioSampleType (which is float32 A typedef)

If you select any other format then the array can have SInt16 values ​​or something else.
Then you should know about your output type when you copy the content of MData.
If you know the format, then you can simply create a Sea-Array 

  datacopy = calloc (DataSize, Sizes (float 32));

and memcpy audioBufferList.mBuffers [i] .mData in that
If you want to use Cocoa NSMutableArray, you need to wrap Float in an NSNumber object.


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