Objective-C - BAD ACCESS EXC - ios

Question

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;
free(data);
}
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.

Answer 1

First of all please conform to the naming convention that variable names start with a lowercase letter.
The error occurs because an instance of NSData is an object / a pointer, you have to add a *
NSData *data = [[NSData alloc] init....
Further it's highly recommended to access properties with dot notation for example
data.bytes
data.length