Question

I have a memory growth seen in xcode instruments, so after trying to eliminate the problem, i have seen that in my audio buffer callback method, there is a block of code that when i erase, the problem is been solved.
so , this callback happens many times a second and cause the growth:

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


        AudioBuffer buffer;

        buffer.mNumberChannels = 1;
        buffer.mDataByteSize = inNumberFrames * 2;
        //NSLog(@"%ld",inNumberFrames);
        buffer.mData = malloc( inNumberFrames * 2 );
        // Put buffer in a AudioBufferList
        AudioBufferList bufferList;
        bufferList.mNumberBuffers = 1;
        bufferList.mBuffers[0] = buffer;



        OSStatus status;
        status = AudioUnitRender(audioUnit, 
                                 ioActionFlags, 
                                 inTimeStamp, 
                                 inBusNumber, 
                                 inNumberFrames, 
                                 &bufferList); 
..
..
..
 free(buffer.mData);

can you see some line here that can cause that? the buffer.mdata is free.
there is something else that i dont free, that is growing .

thanks.

Answer 1

Looks like you forgot to release your bufferList.