BAD ACCESS EXC

Hi everyone,

I am trying to create a project that uses audio streaming from unity. For this, I am developing a plugin.

At the time of recording the audio has no problem and I send the data through a websocket in a base64 string.

Then from xcode I catch it and transform it to NSDATA, that's the problem. At first there are no problems but after a moment, Xcode show me the error EXC_BAD_ACCESS and I can't continue copying the NSDATA into the buffer.

Here is the code.

#import "AudioProcessor.h"
  
#pragma mark Playback callback

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


    AudioProcessor audioProcessor = (AudioProcessor) inRefCon;

   // copy buffer to audio buffer which gets played after function return
    if(ioData->mNumberBuffers > 0) {

         AudioBuffer buffer = ioData->mBuffers[0];

// get the data from Unity
         NSString *inputData = audioProcessor.getInputData;

        if(inputData && ![inputData isKindOfClass:[NSNull class]])
        {

//here it's the problem.
            NSData *data = [[NSData alloc] initWithBase64EncodedString:inputData options:0];

            memcpy(buffer.mData, data.bytes, data.length);
            buffer.mDataByteSize = (int) data.length;
        }

    return noErr;
}

#pragma mark controll stream

-(void)setInputData:(NSString *)datosValue
{
    inputData = datosValue;
}

-(NSString*)getInputData
{
    return inputData;
}

If someone knows how it could be done so that the application does not close, I would appreciate it.