Andur.m

-(void) audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag
{
    static FFTSetupD fft_weights;
    static DSPDoubleSplitComplex input;
    static double *magnitudes;
    
    ExtAudioFileRef fileRef;
    
    ExtAudioFileOpenURL((__bridge CFURLRef)[recorder url], &fileRef);
    
    // 2) Set up audio format // DATA LEAK NOT HERE
    AudioStreamBasicDescription audioFormat;
    audioFormat.mSampleRate = Fs;
    audioFormat.mFormatID = kAudioFormatLinearPCM;
    audioFormat.mFormatFlags = kLinearPCMFormatFlagIsFloat;
    audioFormat.mBitsPerChannel = sizeof(Float32) * 8;
    audioFormat.mChannelsPerFrame = 1; // set this to 2 for stereo
    audioFormat.mBytesPerFrame = audioFormat.mChannelsPerFrame * sizeof(Float32);
    audioFormat.mFramesPerPacket = 1;
    audioFormat.mBytesPerPacket = audioFormat.mFramesPerPacket * audioFormat.mBytesPerFrame;
    
    // 3) Apply audio format to my Extended Audio File
    ExtAudioFileSetProperty(fileRef, kExtAudioFileProperty_ClientDataFormat, sizeof (AudioStreamBasicDescription), &audioFormat);
    
    // 4) Set up an AudioBufferList
    UInt32 outputBufferSize = 32 * 1024; // 32 KB
    UInt32 sizePerPacket = audioFormat.mBytesPerPacket;
    UInt32 packetsPerBuffer = outputBufferSize / sizePerPacket;
    UInt8 *outputBuffer = (UInt8 *)malloc(sizeof(UInt8 *) * outputBufferSize);
    AudioBufferList convertedData;
    convertedData.mNumberBuffers = 1;
    convertedData.mBuffers[0].mNumberChannels = audioFormat.mChannelsPerFrame;
    convertedData.mBuffers[0].mDataByteSize = outputBufferSize;
    convertedData.mBuffers[0].mData = outputBuffer;
    
    // 5) Read Extended Audio File into AudioBufferList with ExtAudioFileRead()
    UInt32 frameCount = packetsPerBuffer;
    
    ExtAudioFileRead(fileRef, &frameCount, &convertedData);
    
    // 6) Log float values of AudioBufferList
    /* Setup weights (twiddle factors) */
    fft_weights = vDSP_create_fftsetupD(two_exp, kFFTRadix2);
    
    /* Allocate memory to store split-complex input and output data */
    input.realp = (double *)malloc(size_buffer * sizeof(double));
    input.imagp = (double *)malloc(size_buffer * sizeof(double));
    magnitudes = (double *)malloc(size_buffer * sizeof(double));
    int bufferSize;
    
    // THIS IS WHERE THE MEMORY LEAK IS BELOW
    
    for(int y = 0; y < convertedData.mNumberBuffers; y++)
    {
        AudioBuffer audioBuffer = convertedData.mBuffers[y];
        bufferSize = audioBuffer.mDataByteSize / sizeof(Float32);
        Float32 *frame = audioBuffer.mData;
        for (int i = 0; i < bufferSize; i++)
        {
            input.realp[i] = (double)frame[i];
            input.imagp[i] = 0.0f;
        }
    }
    
    // There is more stuff here but it is unimportant
    
}