Java — родной сбой SIGSEGV в Android JNI

Я получаю родной сбой signal 11 (SIGSEGV), code 1 (SEGV_MAPERR) случайно в моем приложении. Приложение перебирает файлы и анализирует их в коде C ++ и возвращает массив с плавающей точкой. Это делается в AsyncTask, который выполняется некоторое время при обработке файлов. Что я делаю неправильно в коде, который приводит к сбою? Или это сверхспособность? Спасибо.

Это функция AsyncTask doInBackground:

protected String doInBackground(Object... urls) {

for (int i = 0; i < songFiles.size(); i++) {
SongFile temp = songFiles.get(i);
try {
float[] f = Analyser.getInfo(temp.getPath());
if (f != null && f.length > 1) {
...save to DB
}
}

} catch (Exception e) {
}
}
return "";
}

Функция между кодом Java и C ++:

extern "C" JNIEXPORT jfloatArray Java_com_superpowered_SuperpoweredPlayer_getInfo(JNIEnv *env, jobject instance,jstring filepath) {
jfloatArray ret;
char *Path= (char *) env->GetStringUTFChars(filepath, JNI_FALSE);

ret = (jfloatArray)env->NewFloatArray(2);

float *values = superpoweredPlayer->getKey(Path);

env->SetFloatArrayRegion(ret, 0, 2, values);
env->ReleaseStringUTFChars(filepath, Path);
return ret;

}

Функция C ++ getKey:

float *SuperpoweredPlayer::getKey(char *url) {

SuperpoweredDecoder *decoder = new SuperpoweredDecoder();

//decoder initialize from the URL input
const char *openError = decoder->open(url, false, 0, 0);
if (openError) {
delete decoder;
return NULL;
};

// Create the analyzer.
SuperpoweredOfflineAnalyzer *analyzer = new SuperpoweredOfflineAnalyzer(decoder->samplerate, 0, decoder->durationSeconds);

// Create a buffer for the 16-bit integer samples coming from the decoder.
short int *intBuffer = (short int *)malloc(decoder->samplesPerFrame * 2 * sizeof(short int) + 16384);
// Create a buffer for the 32-bit floating point samples required by the effect.
float *floatBuffer = (float *)malloc(decoder->samplesPerFrame * 2 * sizeof(float) + 1024);

// Processing.
while (true) {

// Decode one frame. samplesDecoded will be overwritten with the actual decoded number of samples.
unsigned int samplesDecoded = decoder->samplesPerFrame;
if (decoder->decode(intBuffer, &samplesDecoded) == SUPERPOWEREDDECODER_ERROR) break;
if (samplesDecoded < 1) break;

// Convert the decoded PCM samples from 16-bit integer to 32-bit floating point.
SuperpoweredShortIntToFloat(intBuffer, floatBuffer, samplesDecoded);

// Submit samples to the analyzer.
analyzer->process(floatBuffer, samplesDecoded);

// Update the progress indicator.
// progress = (double)decoder->samplePosition / (double)decoder->durationSamples;
};// Get the result.
unsigned char *averageWaveform = NULL, *lowWaveform = NULL, *midWaveform = NULL, *highWaveform = NULL, *peakWaveform = NULL, *notes = NULL;
int waveformSize, overviewSize, keyIndex;
char *overviewWaveform = NULL;
float loudpartsAverageDecibel, peakDecibel, bpm, averageDecibel, beatgridStartMs = 0;
analyzer->getresults(&averageWaveform, &peakWaveform, &lowWaveform, &midWaveform, &highWaveform, &notes, &waveformSize, &overviewWaveform, &overviewSize, &averageDecibel, &loudpartsAverageDecibel, &peakDecibel, &bpm, &beatgridStartMs, &keyIndex);

float *ret;
ret=(float*)malloc(2*sizeof(float));
ret[0] = bpm;
ret[1] = keyIndex;

// Cleanup.
delete decoder;
delete analyzer;
free(intBuffer);
free(floatBuffer);

// Done with the result, free memory.
if (averageWaveform) free(averageWaveform);
if (lowWaveform) free(lowWaveform);
if (midWaveform) free(midWaveform);
if (highWaveform) free(highWaveform);
if (peakWaveform) free(peakWaveform);
if (notes) free(notes);
if (overviewWaveform) free(overviewWaveform);

return ret;

}