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为什么下面的粗体线会崩溃？？？有什么建议么？

static OSStatus AudioInputCallback(void *inRefCon,
                               AudioUnitRenderActionFlags *ioActionFlags,
                               const AudioTimeStamp *inTimeStamp,
                               UInt32 inBusNumber,
                               UInt32 inNumberFrames,
                               AudioBufferList *ioData) {

AudioUnitRender(audioUnitIn, ioActionFlags, inTimeStamp, 
inBusNumber, inNumberFrames, inputBufferList);

AudioSampleType is a signed short
**AudioSampleType (pointer)data = inputBufferList->mBuffers[0].mData;**
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