Question

I am working on one project in which i have used AudioUnitRender it runs fine in simulator but gives -50 error in the device.

If anyone have faced similar problem please give me some solution.

RIOInterface* THIS = (RIOInterface *)inRefCon;
COMPLEX_SPLIT A = THIS->A;
void *dataBuffer = THIS->dataBuffer;
float *outputBuffer = THIS->outputBuffer;
FFTSetup fftSetup = THIS->fftSetup;

uint32_t log2n = THIS->log2n;
uint32_t n = THIS->n;
uint32_t nOver2 = THIS->nOver2;
uint32_t stride = 1;
int bufferCapacity = THIS->bufferCapacity;
SInt16 index = THIS->index;

AudioUnit rioUnit = THIS->ioUnit;
OSStatus renderErr;
UInt32 bus1 = 1;

renderErr = AudioUnitRender(rioUnit, ioActionFlags, 
    inTimeStamp, bus1, inNumberFrames, THIS->bufferList);
NSLog(@"%d",renderErr);
if (renderErr < 0) {
    return renderErr;
}

data regarding sample size and frame…

bytesPerSample = sizeof(SInt16);
asbd.mFormatID = kAudioFormatLinearPCM;
asbd.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
asbd.mBitsPerChannel = 8 * bytesPerSample;
asbd.mFramesPerPacket = 1;
asbd.mChannelsPerFrame = 1; 

//asbd.mBytesPerPacket = asbd.mBytesPerFrame * asbd.mFramesPerPacket;
asbd.mBytesPerPacket = bytesPerSample * asbd.mFramesPerPacket;


//asbd.mBytesPerFrame = bytesPerSample * asbd.mChannelsPerFrame;    
asbd.mBytesPerFrame = bytesPerSample * asbd.mChannelsPerFrame;          

asbd.mSampleRate = sampleRate;      

thanks in advance..

Answer 1

The length of the buffer (inNumberFrames) can be different on the device and the simulator. From my experience it is often larger on the device. When you use your own AudioBufferList this is something you have to take into account. I would suggest allocating more memory for the buffer in the AudioBufferList.