private Beat[] ProcessStereo(float[] samples, int numOfSamples, int frequency)
{
Debug.Log("Processing Stereo Song");
float[] rightSamples = new float[numOfSamples];
float[] leftSamples = new float[numOfSamples];
for (int i = 0; i < numOfSamples; i += 1)
{
rightSamples[i] = samples[i * 2];
leftSamples[i] = samples[(i * 2) + 1];
}
Beat[] beatTrack = new Beat[windowIterations + 1];
for (int i = 0; i < beatTrack.Length; i += 1)
{
float[] tempRight = new float[windowInterval];
float[] tempLeft = new float[windowInterval];
if (i < windowIterations)
{
for (int j = 0; j < windowInterval; j += 1)
{
tempRight[j] = rightSamples[(windowInterval * i) + j];
tempLeft[j] = leftSamples[(windowInterval * i) + j];
}
}
else
{
for (int j = 0; j < lastWindowSize; j += 1)
{
tempRight[j] = rightSamples[(windowInterval * i) + j];
tempLeft[j] = leftSamples[(windowInterval * i) + j];
}
}
List <float[]> bandsRight = AudioAnalyser.GetDistinctBands(FastFourierTransform.FftMag(tempRight), frequency, windowInterval / 2.0f);
List <float[]> bandsLeft = AudioAnalyser.GetDistinctBands(FastFourierTransform.FftMag(tempLeft), frequency, windowInterval / 2.0f);
if (energyHistories.Count == 0)
{
Debug.Log("Creating histories");
energyHistories = new List <float[]>();
for (int b = 0; b < bandsRight.Count; b += 1)
{
energyHistories.Add(new float[historyBufferLength]);
bandVariances.Add(new float[historyBufferLength]);
}
}
beatTrack[i] = CheckForBeatBands(bandsRight, bandsLeft);
if (beatTrack[i] != null)
{
beatTrack[i].windowNumber = i;
beatTrack[i].timeStamp = WindowPositionToTime(i);
}
}
return(beatTrack);
}
private Beat[] ProcessMono(float[] samples, int frequency)
{
Debug.Log("Processing Mono Song");
Beat[] beatTrack = new Beat[windowIterations + 1];
for (int i = 0; i < beatTrack.Length; i += 1)
{
float[] temp = new float[windowInterval];
if (i < windowIterations)
{
for (int j = 0; j < windowInterval; j += 1)
{
temp[j] = samples[(windowInterval * i) + j];
}
}
else
{
for (int j = 0; j < lastWindowSize; j += 1)
{
temp[j] = samples[(windowInterval * i) + j];
}
}
List <float[]> bands = AudioAnalyser.GetDistinctBands(FastFourierTransform.FftMag(temp), frequency, windowInterval / 2.0f);
if (energyHistories.Count == 0)
{
Debug.Log("Creating histories");
energyHistories = new List <float[]>();
for (int b = 0; b < bands.Count - 1; b += 1)
{
energyHistories.Add(new float[historyBufferLength]);
bandVariances.Add(new float[historyBufferLength]);
}
}
beatTrack[i] = CheckForBeatBands(bands, null);
if (beatTrack[i] != null)
{
beatTrack[i].windowNumber = i;
beatTrack[i].timeStamp = WindowPositionToTime(i);
}
}
return(beatTrack);
}
void CheckForBeat()
{
GameObject beatCube = GameObject.FindGameObjectWithTag("Beat Cube");
Renderer cubeRend = beatCube.GetComponent <Renderer>();
float[] rightChannel = new float[SAMPLE_SIZE];
float[] leftChannel = new float[SAMPLE_SIZE];
source.GetOutputData(rightChannel, 0);
source.GetOutputData(leftChannel, 1);
rightChannel = FastFourierTransform.FftMag(rightChannel);
leftChannel = FastFourierTransform.FftMag(leftChannel);
float instantEnergy = AudioAnalyser.GetInstantEnergy(rightChannel, leftChannel);
float localAverageEnergy = AudioAnalyser.GetLocalAverageEnergy(instantEnergyHistory);
float variance = AudioAnalyser.GetEnergyVariance(instantEnergyHistory, localAverageEnergy);
float constant = AudioAnalyser.GetEnergyFormulaConstant(variance, 100.5142857f);
float[] shiftArray = new float[instantEnergyHistory.Length];
Array.Copy(instantEnergyHistory, 0, shiftArray, 1, instantEnergyHistory.Length - 1);
shiftArray[0] = instantEnergy;
Array.Copy(shiftArray, instantEnergyHistory, shiftArray.Length);
float beatEnergyTarget = constant * localAverageEnergy;
UnityEngine.Debug.Log("Instant Energy: " + instantEnergyHistory[0] + "\nAverage Energy: " + localAverageEnergy + "\nEnergy Constant: " + constant + "\nBeat target: " + beatEnergyTarget);
if (instantEnergy > beatEnergyTarget)
{
UnityEngine.Debug.Log("Beat Detected");
cubeRend.material.color = Color.green;
beatCount += 1;
}
else
{
cubeRend.material.color = Color.red;
}
}
