Use audio uint to play iLBC but the AudioBuffer is nil in Callback

Question

Hi all , now i try to use audio uint to play iLBC stream , but in the render callback the audiobuffer of the ioData always be null , can you give me some advices , thanks , my code is below:
init code:
OSStatus err = noErr;
if (m_bPlayChannelIsInitialized)
return err;
m_DataSource = dataSource;
SetASBDFormatCanonical( numChannels, sampleRate);
AudioComponentDescription desc;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_RemoteIO;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
AudioComponent comp = AudioComponentFindNext(NULL, &desc);
AudioComponentInstanceNew(comp, &m_OutputUnit);
AURenderCallbackStruct output;
output.inputProc = OutputProc;
output.inputProcRefCon = this;
err = AudioUnitSetProperty(m_OutputUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &output, sizeof(output));
err = AudioUnitSetProperty(m_OutputUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &m_InputDataASBDFormat, sizeof(m_InputDataASBDFormat));
m_bPlayChannelIsInitialized = true;
return err;
SetASBDFormatCanonical:
m_InputDataASBDFormat.mFormatID = kAudioFormatiLBC;
m_InputDataASBDFormat.mFormatFlags = 0;
m_InputDataASBDFormat.mSampleRate = sampleRate;
m_InputDataASBDFormat.mBitsPerChannel = 0;
m_InputDataASBDFormat.mChannelsPerFrame = numChannels;
m_InputDataASBDFormat.mFramesPerPacket = 240;
m_InputDataASBDFormat.mBytesPerFrame = 0;
m_InputDataASBDFormat.mBytesPerPacket = 50;
Message was edited by: asnor

Answer 1

Sorry, I didn't suggest debugging. I can see that activity...
Did you follow the link and consider testing according to the information on that page?