IOS Audioデータ構造説明

struct AudioStreamBasicDescription {
   Float64 mSampleRate;	//44100;     (    = 8000)
   UInt32  mFormatID;	//kAudioFormatLinearPCM;     
   UInt32  mFormatFlags;//kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;
   UInt32  mBytesPerPacket;	//  packet      ，      packet  0；(format.mBytesPerFrame * format.mFramesPerPacket)
   UInt32  mFramesPerPacket;	//packet    frame  ，     1，      ，            ACC 1024。
   UInt32  mBytesPerFrame;	//(format.mBitsPerChannel /  * format.mChannelsPerFrame);
   UInt32  mChannelsPerFrame;	//frame    channel  // 1:   ；2:   
   UInt32  mBitsPerChannel;	//16; //            
   UInt32  mReserved;	//  
};

AudioStreamBasicDescription format; //      ，             

memset(&format, 0, sizeof(format));