void ProcessCommon(AudioReader reader, ref float[] impulse)
{
int targetLen = QMath.Base2Ceil((int)reader.Length) << 1;
Complex[] commonSpectrum = new Complex[targetLen];
FFTCache cache = new FFTCache(targetLen);
for (int ch = 0; ch < reader.ChannelCount; ++ch)
{
float[] channel = new float[targetLen];
WaveformUtils.ExtractChannel(impulse, channel, ch, reader.ChannelCount);
Complex[] spectrum = Measurements.FFT(channel, cache);
for (int band = 0; band < spectrum.Length; ++band)
{
commonSpectrum[band] += spectrum[band];
}
}
float mul = 1f / reader.ChannelCount;
for (int band = 0; band < commonSpectrum.Length; ++band)
{
commonSpectrum[band] = (commonSpectrum[band] * mul).Invert();
}
Array.Resize(ref impulse, impulse.Length << 1);
for (int ch = 0; ch < reader.ChannelCount; ++ch)
{
Convolver filter = GetFilter(commonSpectrum, 1, reader.SampleRate);
filter.Process(impulse, ch, reader.ChannelCount);
}
}
static Dictionary <double, float[]> GetGainDifferences(List <HRTFSetEntry> entries, List <double> hValues)
{
Dictionary <double, float[]> result = new Dictionary <double, float[]>(); // Distance; array by hValues
for (int entry = 0, count = entries.Count; entry < count; ++entry)
{
HRTFSetEntry setEntry = entries[entry];
float maxGain = float.MinValue, minGain = float.MaxValue;
for (int channel = 0; channel < setEntry.Data.Length; ++channel)
{
float peak = QMath.GainToDb(WaveformUtils.GetRMS(setEntry.Data[channel]));
if (maxGain < peak)
{
maxGain = peak;
}
if (minGain > peak)
{
minGain = peak;
}
}
if (!result.ContainsKey(setEntry.Distance))
{
result[setEntry.Distance] = new float[hValues.Count];
}
result[setEntry.Distance][hValues.IndexOf(setEntry.Azimuth)] = maxGain - minGain;
}
return(result);
}
void ProcessPerChannel(AudioReader reader, ref float[] impulse)
{
int targetLen = QMath.Base2Ceil((int)reader.Length) << 1;
Convolver[] filters = new Convolver[reader.ChannelCount];
FFTCache cache = new FFTCache(targetLen);
for (int ch = 0; ch < reader.ChannelCount; ++ch)
{
float[] channel = new float[targetLen];
WaveformUtils.ExtractChannel(impulse, channel, ch, reader.ChannelCount);
Complex[] spectrum = Measurements.FFT(channel, cache);
for (int band = 0; band < spectrum.Length; ++band)
{
spectrum[band] = spectrum[band].Invert();
}
filters[ch] = GetFilter(spectrum, WaveformUtils.GetRMS(channel), reader.SampleRate);
}
Array.Resize(ref impulse, impulse.Length << 1);
for (int ch = 0; ch < reader.ChannelCount; ++ch)
{
filters[ch].Process(impulse, ch, reader.ChannelCount);
}
}
/// <summary>
/// Read all stream data from this block, without separating frames.
/// </summary>
public byte[] GetData()
{
reader.Position = firstFrame;
int length = QMath.Sum(frameSizes);
return(reader.ReadBytes(length));
}
private QVector2IntDir getExitForRect(QRectInt rect)
{
QMazeOutputDirection dir;
int ix = QMath.getRandom(0, rect.width);
int iy;
if (ix == 0 || ix == rect.width - 1)
{
iy = QMath.getRandom(0, rect.height);
dir = (ix == 0 ? QMazeOutputDirection.W : QMazeOutputDirection.E);
}
else
{
if (QMath.getRandom() > 0.5)
{
iy = 0;
dir = QMazeOutputDirection.N;
}
else
{
iy = rect.height - 1;
dir = QMazeOutputDirection.S;
}
}
return(new QVector2IntDir(ix, iy, dir));
}
/// <summary>
/// Convert a float array to complex a size that's ready for FFT.
/// </summary>
public static Complex[] ParseForFFT(this float[] source)
{
Complex[] result = new Complex[QMath.Base2Ceil(source.Length)];
for (int i = 0; i < source.Length; ++i)
{
result[i].Real = source[i];
}
return(result);
}
/// <summary>
/// Moves a graph's average value to 0.
/// </summary>
public static void Normalize(float[] graph)
{
float avg = QMath.Average(graph);
for (int i = 0; i < graph.Length; ++i)
{
graph[i] -= avg;
}
}
private void generateNextLevel()
{
baseMazeEngine.destroyImmediateMazeGeometry();
List <QVector2IntDir> exitPositionList = baseMazeEngine.getExitPositionList();
if (exitPositionList.Count > 1)
{
exitPositionList.RemoveAt(0);
baseMazeEngine.setExitPositionList(exitPositionList);
}
List <QVector2Int> obstaclePositionList = new List <QVector2Int>();
if (prevMazeEngine == null)
{
prevRect = new QRectInt(QMath.getRandom(1, baseMazeEngine.getMazeWidth() - CHILD_MAZE_SIZE - 2),
QMath.getRandom(1, baseMazeEngine.getMazeHeight() - CHILD_MAZE_SIZE - 2), CHILD_MAZE_SIZE, CHILD_MAZE_SIZE);
obstaclePositionList.AddRange(rectToList(prevRect));
prevMazeEngine = createChildMaze(prevRect, childMazeEngine_1);
prevMazeEngine.generateMaze();
player.setPosition(prevMazeEngine.transform.TransformPoint(prevMazeEngine.getFinishPositionList()[0].toVector3()));
}
else
{
prevMazeEngine.destroyImmediateMazeGeometry();
prevRect = nextRect;
prevMazeEngine = nextMazeEngine;
obstaclePositionList.AddRange(rectToList(prevRect));
}
nextRect = new QRectInt(QMath.getRandom(1, baseMazeEngine.getMazeWidth() - CHILD_MAZE_SIZE - 2),
QMath.getRandom(1, baseMazeEngine.getMazeHeight() - CHILD_MAZE_SIZE - 2), CHILD_MAZE_SIZE, CHILD_MAZE_SIZE);
while (isRectNear(prevRect, nextRect))
{
nextRect.x = QMath.getRandom(1, baseMazeEngine.getMazeWidth() - CHILD_MAZE_SIZE - 2);
nextRect.y = QMath.getRandom(1, baseMazeEngine.getMazeHeight() - CHILD_MAZE_SIZE - 2);
}
obstaclePositionList.AddRange(rectToList(nextRect));
baseMazeEngine.setObstaclePositionList(obstaclePositionList);
nextMazeEngine = createChildMaze(nextRect, prevMazeEngine == childMazeEngine_1 ? childMazeEngine_2 : childMazeEngine_1);
nextMazeEngine.generateMaze();
List <QVector2IntDir> nextMazeEngineFinishPositionList = nextMazeEngine.getFinishPositionList();
finishTransform.parent = nextMazeEngine.getMazeData()[nextMazeEngineFinishPositionList[0].x][nextMazeEngineFinishPositionList[0].y].geometry.transform;
finishTransform.localPosition = new Vector3();
player.setGoal(nextMazeEngine.transform.TransformPoint(nextMazeEngineFinishPositionList[0].toVector3()), goalReachedHandler);
baseMazeEngine.generateMaze();
currentLevel++;
levelText.text = "LEVEL: " + currentLevel;
}
public void TruncateTest()
{
Decimal i = 16.151m;
int midPointRouting = 2;
Decimal expected = 16.15m;
Decimal actual;
actual = QMath.Truncate(i, midPointRouting);
Assert.AreEqual(expected, actual);
}
public void CeillingTest_d()
{
Decimal i = 16.156m;
int midPointRouting = 2;
Decimal expected = 16.16m;
Decimal actual;
actual = QMath.Ceilling(i, midPointRouting);
Assert.AreEqual(expected, actual);
}
//TODO Switch to latest versions of .NET and implement a BigInt Version.
/// <summary>
/// Rounds the given value to the specified number of significant figures/digits.
/// </summary>
/// <param name="val"> The value to be rounded </param>
/// <param name="digits"> the number of significant figures </param>
/// <returns> the rounded number </returns>
public static double RoundToSignificantDigits(double val, int digits)
{
if (val == 0)
{
return(0);
}
double scale = QMath.Pow(10, QMath.Floor(QMath.Log10(QMath.Abs(val))) + 1);
return(scale * QMath.Round(val / scale, digits));
}
#pragma warning disable CS0675 // Bitwise-or operator used on a sign-extended operand
/// <summary>
/// Reads the next VINT from a stream, does not cut the leading 1.
/// </summary>
public static long ReadTag(Stream reader)
{
int first = reader.ReadByte();
int extraBytes = QMath.LeadingZerosInByte(first);
long value = first;
for (int i = 0; i < extraBytes; ++i)
{
value = (value << 8) | reader.ReadByte();
}
return(value);
}
/// <summary>
/// Apply variable smoothing (in octaves) on a graph drawn with
/// <see cref="ConvertToGraph(float[], double, double, int, int)"/>.
/// </summary>
public static float[] SmoothGraph(float[] samples, float startFreq, float endFreq, float startOctave, float endOctave)
{
float[] startGraph = SmoothGraph(samples, startFreq, endFreq, startOctave),
endGraph = SmoothGraph(samples, startFreq, endFreq, endOctave),
output = new float[samples.Length];
float positioner = 1f / samples.Length;
for (int i = 0; i < samples.Length; ++i)
{
output[i] = QMath.Lerp(startGraph[i], endGraph[i], i * positioner);
}
return(output);
}
/// <summary>
/// Cache the samples if the source should be rendered. This wouldn't be thread safe.
/// </summary>
/// <returns>The collection should be performed, as all requirements are met</returns>
protected internal virtual bool Precollect()
{
if (delay > 0)
{
delay -= listener.UpdateRate;
return(false);
}
if (listener.sourceDistances.Contains(distance))
{
if (listener.AudioQuality != QualityModes.Low)
{
if (DopplerLevel == 0)
{
calculatedPitch = Pitch;
}
else
{
float dopplerTarget = Pitch + lastDoppler * // c / (c - dv), dv = ds / dt
(SpeedOfSound / (SpeedOfSound - (lastDistance - distance) / listener.pulseDelta) - 1);
lastDoppler = Math.Clamp(QMath.Lerp(lastDoppler, dopplerTarget,
10 * listener.UpdateRate / (float)listener.SampleRate), 0, DopplerLevel);
calculatedPitch = Math.Clamp(lastDoppler, .5f, 3f);
}
}
else
{
calculatedPitch = 1; // Disable any pitch change on low quality
}
resampleMult = listener.SampleRate != Clip.SampleRate ? (float)Clip.SampleRate / listener.SampleRate : 1;
baseUpdateRate = (int)(listener.UpdateRate * calculatedPitch);
PitchedUpdateRate = (int)(baseUpdateRate * resampleMult);
if (samples.Length != PitchedUpdateRate)
{
samples = new float[PitchedUpdateRate];
}
if (Clip.Channels == 2 && leftSamples.Length != PitchedUpdateRate)
{
leftSamples = new float[PitchedUpdateRate];
rightSamples = new float[PitchedUpdateRate];
}
Rendered = GetSamples();
if (rendered.Length != Listener.Channels.Length * listener.UpdateRate)
{
rendered = new float[Listener.Channels.Length * listener.UpdateRate];
}
return(true);
}
Rendered = null;
return(false);
}
/// <summary>
/// Constructs an optimized convolution.
/// </summary>
public FastConvolver(float[] impulse, int delay = 0)
{
int fftSize = 2 << QMath.Log2Ceil(impulse.Length); // Zero padding for the falloff to have space
cache = new FFTCache(fftSize);
filter = new Complex[fftSize];
for (int sample = 0; sample < impulse.Length; ++sample)
{
filter[sample].Real = impulse[sample];
}
filter.InPlaceFFT(cache);
present = new Complex[fftSize];
future = new float[fftSize + delay];
this.delay = delay;
}
public int UpdateMe(Node node, Person me)
{
me.angleQ = QMath.RadLimitQ(me.angleQ + node.angleDeltaQ);
me.xQ += QMath.CosQ(me.angleQ, me.speedRev);
me.zQ += QMath.SinQ(me.angleQ, me.speedRev);
me.steps--;
if (me.steps == 0)
{
return((int)node.NodeFeedback.targetReached);
}
else
{
return((int)node.NodeFeedback.notFinished);
}
}
/// <summary>
/// Gets the number of minimum bits required to represent this integer. Of course, all integers take the same space but a lower integer can be represented by
/// less bits.
/// </summary>
/// <param name="number"> the integer </param>
/// <returns> the bits required to represent said integer. if negative, will return 32 as negative values require the flag. input the absolute value
/// if you wish the minimum bits if the number was not negative to be returned. </returns>
public static int GetIntMinimumBits(int number)
{
if (number < 0)
{
return(32);
}
for (int i = 31; i >= 0; i--)
{
if (number % QMath.Pow(2, i) != number)
{
return(i + 1); //TODO Left here.
}
}
return(1);
}
void ProcessImpulse(object sender, RoutedEventArgs e)
{
if (browser.ShowDialog().Value)
{
AudioReader reader = AudioReader.Open(browser.FileName);
float[] impulse = reader.Read();
float gain = 1;
if (keepGain.IsChecked.Value)
{
gain = WaveformUtils.GetPeak(impulse);
}
if (commonEQ.IsChecked.Value)
{
ProcessCommon(reader, ref impulse);
}
else
{
ProcessPerChannel(reader, ref impulse);
}
if (keepGain.IsChecked.Value)
{
WaveformUtils.Gain(impulse, gain / WaveformUtils.GetPeak(impulse));
}
BitDepth bits = reader.Bits;
if (forceFloat.IsChecked.Value)
{
bits = BitDepth.Float32;
}
int targetLen = QMath.Base2Ceil((int)reader.Length);
if (separateExport.IsChecked.Value)
{
ReferenceChannel[] channels = ChannelPrototype.GetStandardMatrix(reader.ChannelCount);
for (int ch = 0; ch < reader.ChannelCount; ++ch)
{
string exportName = Path.GetFileName(browser.FileName);
int idx = exportName.LastIndexOf('.');
string channelName = ChannelPrototype.Mapping[(int)channels[ch]].Name;
exporter.FileName = $"{exportName[..idx]} - {channelName}{exportName[idx..]}";
private void generateNextPart()
{
QMazeEngine mazeEngine = (QMazeEngine)GameObject.Instantiate(mazeEnginePrefab);
mazeEngine.getMazePiecePack().getPiece(QMazePieceType.Intersection).use = false;
mazeEngine.transform.position = new Vector3(currentPartId * mazeEngine.getMazeWidth() * mazeEngine.getMazePieceWidth(), 0, 0);
parts.Enqueue(mazeEngine);
if (currentPartId == 0)
{
List <QVector2IntDir> startPositionList = new List <QVector2IntDir>();
startPositionList.Add(new QVector2IntDir(0, 0, QMazeOutputDirection.NotSpecified));
mazeEngine.setStartPositionList(startPositionList);
lastExitY = QMath.getRandom(0, mazeEngine.getMazeHeight() - 1);
List <QVector2IntDir> exitPositionList = new List <QVector2IntDir>();
exitPositionList.Add(new QVector2IntDir(mazeEngine.getMazeWidth() - 1, lastExitY, QMazeOutputDirection.E));
mazeEngine.setExitPositionList(exitPositionList);
}
else
{
List <QVector2IntDir> exitPositionList = new List <QVector2IntDir>();
exitPositionList.Add(new QVector2IntDir(0, lastExitY, QMazeOutputDirection.W));
lastExitY = QMath.getRandom(0, mazeEngine.getMazeHeight() - 1);
exitPositionList.Add(new QVector2IntDir(mazeEngine.getMazeWidth() - 1, lastExitY, QMazeOutputDirection.E));
mazeEngine.setExitPositionList(exitPositionList);
}
GameObject block = (GameObject)GameObject.Instantiate(blockPrefab);
block.transform.parent = mazeEngine.gameObject.transform;
block.transform.position = new Vector3(((currentPartId + 1) * mazeEngine.getMazeWidth() - 0.5f) * mazeEngine.getMazePieceWidth(), 0, -lastExitY * mazeEngine.getMazePieceHeight());
block.GetComponent <QBlock>().triggerHandlerEvent += blockHandler;
mazeEngine.generateMazeAsync(this, 0.016f);
levelText.text = "LEVEL: " + currentPartId;
currentPartId++;
}
/// <summary>
/// Constructs an optimized convolution.
/// </summary>
public DualConvolver(float[] impulse1, float[] impulse2, int delay1 = 0, int delay2 = 0)
{
int impulseLength = Math.Max(impulse1.Length, impulse2.Length);
int fftSize = 2 << QMath.Log2Ceil(impulseLength); // Zero padding for the falloff to have space
cache = new FFTCache(fftSize);
filter = new Complex[fftSize];
for (int sample = 0; sample < impulse1.Length; ++sample)
{
filter[sample].Real = impulse1[sample];
}
for (int sample = 0; sample < impulse2.Length; ++sample)
{
filter[sample].Imaginary = impulse2[sample];
}
filter.InPlaceFFT(cache);
present = new Complex[fftSize];
future = new Complex[fftSize + Math.Max(delay1, delay2)];
this.delay1 = delay1;
this.delay2 = delay2;
}
/// <summary>
/// Gets the gain at a given frequency.
/// </summary>
public double this[double frequency] {
get {
int bandCount = bands.Count;
if (bandCount == 0)
{
return(0);
}
int nextBand = 0, prevBand = 0;
while (nextBand != bandCount && bands[nextBand].Frequency < frequency)
{
prevBand = nextBand;
++nextBand;
}
if (nextBand != bandCount && nextBand != 0)
{
return(QMath.Lerp(bands[prevBand].Gain, bands[nextBand].Gain,
QMath.LerpInverse(bands[prevBand].Frequency, bands[nextBand].Frequency, frequency)));
}
return(bands[prevBand].Gain);
}
}
/// <summary>
/// Resamples a single channel with medium quality (linear interpolation).
/// </summary>
/// <param name="samples">Samples of the source channel</param>
/// <param name="to">New sample count</param>
/// <returns>Returns a resampled version of the given array</returns>
public static float[] Lerp(float[] samples, int to)
{
if (samples.Length == to)
{
return(samples);
}
float[] output = new float[to];
float ratio = samples.Length / (float)to;
int lerpUntil = (int)((samples.Length - 1) / ratio); // Halving point where i * ratio would be over the array
for (int i = 0; i < lerpUntil; ++i)
{
int sample = (int)(i * ratio);
output[i] = QMath.Lerp(samples[sample], samples[sample + 1], i * ratio % 1);
}
for (int i = lerpUntil; i < to; ++i)
{
output[i] = samples[(int)(i * ratio)];
}
return(output);
}
void Update()
{
float[][] samples = Source.cavernSource.Rendered;
if (samples != null)
{
float peakSize = float.NegativeInfinity;
for (int channel = 0; channel < samples.Length; ++channel)
{
float channelSize = 20 * (float)Math.Log10(WaveformUtils.GetPeak(samples[channel]));
if (channelSize < -600)
{
channelSize = -600;
}
if (peakSize < channelSize)
{
peakSize = channelSize;
}
}
float size = Mathf.Clamp(peakSize / -DynamicRange + 1, 0, 1);
scale = QMath.Lerp(scale, (MaxSize - MinSize) * size + MinSize, 1 - Smoothing);
transform.localScale = new Vector3(scale, scale, scale);
}
}
void ObjectBasicInfo(BitExtractor extractor, bool readAllBlocks)
{
int blocks = readAllBlocks ? 3 : extractor.Read(2);
// Gain
if ((blocks & 2) != 0)
{
int gainHelper = extractor.Read(2);
gain = gainHelper switch {
0 => 1,
1 => 0,
2 => (gainHelper = extractor.Read(6)) < 15 ?
QMath.DbToGain(15 - gainHelper) : QMath.DbToGain(14 - gainHelper),
_ => - 1,
};
}
// Priority - unneccessary, everything's rendered
if ((blocks & 1) != 0 && !extractor.ReadBit())
{
extractor.Skip(5);
}
}
/// <summary>
/// Reads the next VINT from a stream, cuts the leading 1, reads the correct value.
/// </summary>
public static long ReadValue(Stream reader)
{
long value = ReadTag(reader);
return(value - (1L << QMath.BitsAfterMSB(value)));
}
/// <summary>
/// For E-AC-3, data for multiple blocks is included in an audio frame header.
/// </summary>
void AudioFrame()
{
expstre = header.Blocks != 6 || extractor.ReadBit();
ahte = header.Blocks == 6 && extractor.ReadBit();
snroffststr = extractor.Read(2);
transproce = extractor.ReadBit();
blkswe = extractor.ReadBit();
dithflage = extractor.ReadBit();
bamode = extractor.ReadBit();
frmfgaincode = extractor.ReadBit();
dbaflde = extractor.ReadBit();
skipflde = extractor.ReadBit();
spxattene = extractor.ReadBit();
if (header.ChannelMode > 1) // Not mono
{
cplstre[0] = true;
cplinu[0] = extractor.ReadBit();
for (int block = 1; block < cplstre.Length; ++block)
{
if (cplstre[block] = extractor.ReadBit())
{
cplinu[block] = extractor.ReadBit();
}
else
{
cplinu[block] = cplinu[block - 1];
}
}
}
else
{
for (int block = 1; block < cplstre.Length; ++block)
{
cplinu[block] = false;
}
}
// Exponent strategy data init
if (expstre)
{
for (int block = 0; block < cplexpstr.Length; ++block)
{
if (cplinu[block])
{
cplexpstr[block] = (ExpStrat)extractor.Read(2);
}
for (int channel = 0; channel < channels.Length; ++channel)
{
chexpstr[block][channel] = (ExpStrat)extractor.Read(2);
}
}
}
else
{
int ncplblks = 0;
for (int block = 0; block < cplinu.Length; ++block)
{
if (cplinu[block])
{
++ncplblks;
}
}
if (header.ChannelMode > 1 && ncplblks > 0)
{
frmcplexpstr = extractor.Read(5);
}
for (int channel = 0; channel < channels.Length; ++channel)
{
frmchexpstr[channel] = extractor.Read(5);
}
for (int block = 0; block < cplexpstr.Length; ++block)
{
cplexpstr[block] = frmcplexpstr_tbl[frmcplexpstr][block];
for (int channel = 0; channel < channels.Length; ++channel)
{
chexpstr[block][channel] = frmcplexpstr_tbl[frmchexpstr[channel]][block];
}
}
}
if (header.LFE)
{
for (int block = 0; block < lfeexpstr.Length; ++block)
{
lfeexpstr[block] = extractor.ReadBit();
}
}
// Converter exponent strategy data
if (header.StreamType == StreamTypes.Independent &&
(convexpstre = header.Blocks == 6 || extractor.ReadBit()))
{
for (int channel = 0; channel < channels.Length; ++channel)
{
convexpstr[channel] = extractor.Read(5);
}
}
// AHT data
if (ahte)
{
throw new UnsupportedFeatureException("AHT");
}
// Audio frame SNR offset data
if (snroffststr == 0)
{
frmcsnroffst = extractor.Read(6);
frmfsnroffst = extractor.Read(4);
}
// Transient pre-noise processing data
if (transproce)
{
for (int channel = 0; channel < channels.Length; ++channel)
{
if (chintransproc[channel] = extractor.ReadBit())
{
transprocloc[channel] = extractor.Read(10);
transproclen[channel] = extractor.Read(8);
}
}
}
// Spectral extension attenuation data
if (spxattene)
{
for (int ch = 0; ch < channels.Length; ++ch)
{
if (chinspxatten[ch] = extractor.ReadBit())
{
spxattencod[ch] = extractor.Read(5);
}
}
}
if (blkstrtinfoe = header.Blocks != 1 && extractor.ReadBit())
{
int nblkstrtbits = (header.Blocks - 1) * (4 + QMath.Log2Ceil(header.WordsPerSyncframe));
blkstrtinfo = extractor.Read(nblkstrtbits);
}
// Syntax state init
for (int channel = 0; channel < channels.Length; ++channel)
{
firstspxcos[channel] = true;
firstcplcos[channel] = true;
}
firstcplleak = true;
}
/// <summary>
/// Generate the left/right ear filters.
/// </summary>
/// <param name="right">The object is to the right of the <see cref="Listener"/>'s forward vector</param>
/// <param name="samples">Single-channel downmixed samples to process</param>
public void Generate(bool right, float[] samples)
{
float dirMul = -90;
if (right)
{
dirMul = 90;
}
Vector3 sourceForward = new Vector3(0, dirMul, 0).RotateInverse(source.listener.Rotation).PlaceInSphere(),
dir = source.Position - source.listener.Position;
float distance = dir.Length(),
rawAngle = (float)Math.Acos(Vector3.Dot(sourceForward, dir) / distance),
angle = rawAngle * VectorExtensions.Rad2Deg;
distance /= distanceFactor;
// Find bounding angles with discrete impulses
int smallerAngle = 0;
while (smallerAngle < angles.Length && angles[smallerAngle] < angle)
{
++smallerAngle;
}
if (smallerAngle != 0)
{
--smallerAngle;
}
int largerAngle = smallerAngle + 1;
if (largerAngle == angles.Length)
{
largerAngle = angles.Length - 1;
}
float angleRatio = Math.Min(QMath.LerpInverse(angles[smallerAngle], angles[largerAngle], angle), 1);
// Find bounding distances with discrete impulses
int smallerDistance = 0;
while (smallerDistance < distances.Length && distances[smallerDistance] < distance)
{
++smallerDistance;
}
if (smallerDistance != 0)
{
--smallerDistance;
}
int largerDistance = smallerDistance + 1;
if (largerDistance == distances.Length)
{
largerDistance = distances.Length - 1;
}
float distanceRatio =
Math.Clamp(QMath.LerpInverse(distances[smallerDistance], distances[largerDistance], distance), 0, 1);
// Find impulse candidates and their weight
float[][] candidates = new float[4][] {
impulses[smallerAngle][smallerDistance],
impulses[smallerAngle][largerDistance],
impulses[largerAngle][smallerDistance],
impulses[largerAngle][largerDistance]
};
float[] gains = new float[4] {
(float)Math.Sqrt((1 - angleRatio) * (1 - distanceRatio)),
(float)Math.Sqrt((1 - angleRatio) * distanceRatio),
(float)Math.Sqrt(angleRatio * (1 - distanceRatio)),
(float)Math.Sqrt(angleRatio * distanceRatio)
};
// Apply the ear canal's response
Array.Clear(filter.Impulse, 0, filterSize);
for (int candidate = 0; candidate < candidates.Length; ++candidate)
{
WaveformUtils.Mix(candidates[candidate], filter.Impulse, gains[candidate]);
}
filter.Process(samples);
// Apply gains
float angleDiff = (float)(Math.Sin(rawAngle) * .097f);
float ratioDiff = (distance + angleDiff) * (VirtualizerFilter.referenceDistance - angleDiff) /
((distance - angleDiff) * (VirtualizerFilter.referenceDistance + angleDiff));
ratioDiff *= ratioDiff;
if (right)
{
if (ratioDiff < 1)
{
RightGain = ratioDiff;
}
else
{
LeftGain = 1 / ratioDiff;
}
}
else
{
if (ratioDiff < 1)
{
LeftGain = ratioDiff;
}
else
{
RightGain = 1 / ratioDiff;
}
}
}
void Update()
{
if (!CavernSource)
{
OnDisable();
return;
}
for (int row = 0; row < Rows; ++row)
{
for (int column = 0; column < Columns; ++column)
{
SeatMovements[row][column].Height = 200;
}
}
int lastRow = Rows - 1, lastColumn = Columns - 1;
if (CavernSource[0] != null) // Front left
{
SeatMovements[0][0].Height = CavernSource[0].Height;
}
if (CavernSource[1] != null) // Front right
{
SeatMovements[0][lastColumn].Height = CavernSource[1].Height;
}
if (CavernSource[2] != null && CavernSource[2].Height != Cavernizer.unsetHeight) // Center
{
SeatMovements[0][lastColumn / 2].Height = CavernSource[2].Height;
}
if (CavernSource[6] != null) // Side left
{
SeatMovements[lastRow][0].Height = CavernSource[6].Height;
}
if (CavernSource[7] != null) // Side right
{
SeatMovements[lastRow][lastColumn].Height = CavernSource[7].Height;
}
// Addition is okay, and should be used, as the rears are near the sides in the back corners.
if (CavernSource[4] != null) // Rear left
{
SeatMovements[lastRow][0].Height += CavernSource[4].Height;
}
if (CavernSource[5] != null) // Rear right
{
SeatMovements[lastRow][lastColumn].Height += CavernSource[5].Height;
}
SpatializedChannel rearCenter = CavernSource.GetChannel(ReferenceChannel.RearCenter);
if (rearCenter != null) // Rear center
{
SeatMovements[lastRow][lastColumn / 2].Height = rearCenter.Height;
}
// Use the front channels for moving all seats if nothing else is available for the rear sides
if (SeatMovements[lastRow][0].Height == 200)
{
SeatMovements[lastRow][0].Height = SeatMovements[0][0].Height;
}
if (SeatMovements[lastRow][lastColumn].Height == 200)
{
SeatMovements[lastRow][lastColumn].Height = SeatMovements[0][lastColumn].Height;
}
// Seat position interpolation
for (int row = 0; row < Rows; ++row)
{
int prev = 0;
for (int column = 0; column < Columns; ++column)
{
if (SeatMovements[row][column].Height != 200)
{
float lerpDiv = column - prev;
for (int oldColumn = prev; oldColumn < column; ++oldColumn)
{
SeatMovements[row][oldColumn].Height =
QMath.Lerp(SeatMovements[row][prev].Height, SeatMovements[row][column].Height, (oldColumn - prev) / lerpDiv);
}
prev = column;
}
}
if (prev != lastColumn)
{
float lerpDiv = lastColumn - prev;
for (int oldColumn = prev; oldColumn < lastColumn; ++oldColumn)
{
SeatMovements[row][oldColumn].Height =
QMath.Lerp(SeatMovements[row][prev].Height, SeatMovements[row][lastColumn].Height, (oldColumn - prev) / lerpDiv);
}
}
}
for (int column = 0; column < Columns; ++column)
{
int prev = 0;
for (int row = 0; row < Rows; ++row)
{
if (SeatMovements[row][column].Height != 200)
{
float lerpDiv = row - prev;
for (int oldRow = prev; oldRow < row; ++oldRow)
{
SeatMovements[oldRow][column].Height =
QMath.Lerp(SeatMovements[prev][column].Height, SeatMovements[row][column].Height, (oldRow - prev) / lerpDiv);
}
prev = row;
}
}
if (prev != lastRow)
{
float lerpDiv = lastRow - prev;
for (int oldRow = prev; oldRow < lastRow; ++oldRow)
{
SeatMovements[oldRow][column].Height = QMath.Lerp(SeatMovements[prev][column].Height, SeatMovements[lastRow][column].Height,
(oldRow - prev) / lerpDiv);
}
}
}
// Seat rotation interpolation
for (int row = 0; row < Rows; ++row)
{
SeatMovements[row][0].Rotation.z = Mathf.Clamp((SeatMovements[row][1].Height - SeatMovements[row][0].Height) * RotationConstant * 2,
-MaxRotationSide, MaxRotationSide);
for (int column = 1; column < lastColumn; ++column)
{
SeatMovements[row][column].Rotation.z = Mathf.Clamp((SeatMovements[row][column + 1].Height - SeatMovements[row][column - 1].Height) *
RotationConstant, -MaxRotationSide, MaxRotationSide);
}
SeatMovements[row][lastColumn].Rotation.z = Mathf.Clamp((SeatMovements[row][lastColumn].Height - SeatMovements[row][lastColumn - 1].Height) *
RotationConstant * 2, -MaxRotationSide, MaxRotationSide);
}
for (int column = 0; column < Columns; ++column)
{
SeatMovements[0][column].Rotation.x = Mathf.Clamp((SeatMovements[1][column].Height - SeatMovements[0][column].Height) * RotationConstant * 2, -20, 20);
for (int row = 1; row < lastRow; ++row)
{
SeatMovements[row][column].Rotation.x = Mathf.Clamp((SeatMovements[row + 1][column].Height - SeatMovements[row - 1][column].Height) *
RotationConstant, -MaxRotationFace, MaxRotationFace);
}
SeatMovements[lastRow][column].Rotation.x = Mathf.Clamp((SeatMovements[lastRow][column].Height - SeatMovements[lastRow - 1][column].Height) *
RotationConstant * 2, -MaxRotationFace, MaxRotationFace);
}
}
/// <summary>
/// Process the source and returns a mix to be added to the output.
/// </summary>
protected internal virtual float[] Collect()
{
// Preparations, clean environment
int channels = Listener.Channels.Length,
updateRate = listener.UpdateRate;
Array.Clear(rendered, 0, rendered.Length);
// Render audio if not muted
if (!Mute)
{
int clipChannels = Clip.Channels;
// 3D renderer preprocessing
if (SpatialBlend != 0)
{
if (listener.AudioQuality >= QualityModes.High && clipChannels != 1) // Mono downmix above medium quality
{
Array.Clear(samples, 0, PitchedUpdateRate);
for (int channel = 0; channel < clipChannels; ++channel)
{
WaveformUtils.Mix(Rendered[channel], samples);
}
WaveformUtils.Gain(samples, 1f / clipChannels);
}
else // First channel only otherwise
{
Array.Copy(Rendered[0], samples, PitchedUpdateRate);
}
}
// 1D renderer
if (SpatialBlend != 1)
{
float volume1D = Volume * (1f - SpatialBlend);
// 1:1 mix for non-stereo sources
if (clipChannels != 2)
{
samples = Resample.Adaptive(samples, updateRate, listener.AudioQuality);
WriteOutput(samples, rendered, volume1D, channels);
}
// Full side mix for stereo sources
else
{
Array.Copy(Rendered[0], leftSamples, PitchedUpdateRate);
Array.Copy(Rendered[1], rightSamples, PitchedUpdateRate);
leftSamples = Resample.Adaptive(leftSamples, updateRate, listener.AudioQuality);
rightSamples = Resample.Adaptive(rightSamples, updateRate, listener.AudioQuality);
Stereo1DMix(volume1D);
}
}
// 3D mix, if the source is in range
if (SpatialBlend != 0 && distance < listener.Range)
{
Vector3 direction = (Position - listener.Position).RotateInverse(listener.Rotation);
float rolloffDistance = GetRolloff();
samples = Resample.Adaptive(samples, updateRate, listener.AudioQuality);
baseUpdateRate = samples.Length;
// Apply filter if set
if (SpatialFilter != null)
{
SpatialFilter.Process(samples);
}
// Distance simulation for HRTF
// TODO: gain correction for this in both engines
if (DistanceSimulation && Listener.HeadphoneVirtualizer)
{
if (distancer == null)
{
distancer = new Distancer(this);
}
distancer.Generate(direction.X > 0, samples);
}
// ------------------------------------------------------------------
// Balance-based engine for symmetrical layouts
// ------------------------------------------------------------------
if (Listener.IsSymmetric)
{
float volume3D = Volume * rolloffDistance * SpatialBlend;
if (!LFE)
{
// Find a bounding box
int bottomFrontLeft = -1,
bottomFrontRight = -1,
bottomRearLeft = -1,
bottomRearRight = -1,
topFrontLeft = -1,
topFrontRight = -1,
topRearLeft = -1,
topRearRight = -1;
// Closest layers on Y and Z axes
float closestTop = 78,
closestBottom = -73,
closestTF = 75,
closestTR = -73,
closestBF = 75,
closestBR = -69;
// Find closest horizontal layers
if (Listener.HeadphoneVirtualizer)
{
direction = direction.WarpToCube() / Listener.EnvironmentSize;
}
else
{
direction /= Listener.EnvironmentSize;
}
for (int channel = 0; channel < channels; ++channel)
{
if (!Listener.Channels[channel].LFE)
{
float channelY = Listener.Channels[channel].CubicalPos.Y;
if (channelY < direction.Y)
{
if (channelY > closestBottom)
{
closestBottom = channelY;
}
}
else if (channelY < closestTop)
{
closestTop = channelY;
}
}
}
for (int channel = 0; channel < channels; ++channel)
{
if (!Listener.Channels[channel].LFE)
{
Vector3 channelPos = Listener.Channels[channel].CubicalPos;
if (channelPos.Y == closestBottom) // Bottom layer
{
AssignHorizontalLayer(channel, ref bottomFrontLeft, ref bottomFrontRight,
ref bottomRearLeft, ref bottomRearRight, ref closestBF, ref closestBR,
direction, channelPos);
}
if (channelPos.Y == closestTop) // Top layer
{
AssignHorizontalLayer(channel, ref topFrontLeft, ref topFrontRight,
ref topRearLeft, ref topRearRight,
ref closestTF, ref closestTR, direction, channelPos);
}
}
}
// Fix incomplete top layer
FixIncompleteLayer(ref topFrontLeft, ref topFrontRight, ref topRearLeft, ref topRearRight);
// When the bottom layer is completely empty (= the source is below all channels), copy the top layer
if (bottomFrontLeft == -1 && bottomFrontRight == -1 &&
bottomRearLeft == -1 && bottomRearRight == -1)
{
bottomFrontLeft = topFrontLeft;
bottomFrontRight = topFrontRight;
bottomRearLeft = topRearLeft;
bottomRearRight = topRearRight;
}
// Fix incomplete bottom layer
else
{
FixIncompleteLayer(ref bottomFrontLeft, ref bottomFrontRight,
ref bottomRearLeft, ref bottomRearRight);
}
// When the top layer is completely empty (= the source is above all channels), copy the bottom layer
if (topFrontLeft == -1 || topFrontRight == -1 || topRearLeft == -1 || topRearRight == -1)
{
topFrontLeft = bottomFrontLeft;
topFrontRight = bottomFrontRight;
topRearLeft = bottomRearLeft;
topRearRight = bottomRearRight;
}
// Spatial mix gain precalculation
Vector2 layerVol = new Vector2(.5f); // (bottom; top)
if (topFrontLeft != bottomFrontLeft) // Height ratio calculation
{
float bottomY = Listener.Channels[bottomFrontLeft].CubicalPos.Y;
layerVol.Y = (direction.Y - bottomY) / (Listener.Channels[topFrontLeft].CubicalPos.Y - bottomY);
layerVol.X = 1f - layerVol.Y;
}
// Length ratios (bottom; top)
Vector2 frontVol = new Vector2(LengthRatio(bottomRearLeft, bottomFrontLeft, direction.Z),
LengthRatio(topRearLeft, topFrontLeft, direction.Z));
// Width ratios
float BFRVol = WidthRatio(bottomFrontLeft, bottomFrontRight, direction.X),
BRRVol = WidthRatio(bottomRearLeft, bottomRearRight, direction.X),
TFRVol = WidthRatio(topFrontLeft, topFrontRight, direction.X),
TRRVol = WidthRatio(topRearLeft, topRearRight, direction.X),
innerVolume3D = volume3D;
if (Size != 0)
{
frontVol = QMath.Lerp(frontVol, new Vector2(.5f), Size);
BFRVol = QMath.Lerp(BFRVol, .5f, Size);
BRRVol = QMath.Lerp(BRRVol, .5f, Size);
TFRVol = QMath.Lerp(TFRVol, .5f, Size);
TRRVol = QMath.Lerp(TRRVol, .5f, Size);
innerVolume3D *= 1f - Size;
float extraChannelVolume = volume3D * Size / channels;
for (int channel = 0; channel < channels; ++channel)
{
WriteOutput(samples, rendered, extraChannelVolume, channel, channels);
}
}
// Spatial mix gain finalization
Vector2 rearVol = new Vector2(1) - frontVol;
layerVol *= innerVolume3D;
frontVol *= layerVol;
rearVol *= layerVol;
WriteOutput(samples, rendered, frontVol.X * (1f - BFRVol), bottomFrontLeft, channels);
WriteOutput(samples, rendered, frontVol.X * BFRVol, bottomFrontRight, channels);
WriteOutput(samples, rendered, rearVol.X * (1f - BRRVol), bottomRearLeft, channels);
WriteOutput(samples, rendered, rearVol.X * BRRVol, bottomRearRight, channels);
WriteOutput(samples, rendered, frontVol.Y * (1f - TFRVol), topFrontLeft, channels);
WriteOutput(samples, rendered, frontVol.Y * TFRVol, topFrontRight, channels);
WriteOutput(samples, rendered, rearVol.Y * (1f - TRRVol), topRearLeft, channels);
WriteOutput(samples, rendered, rearVol.Y * TRRVol, topRearRight, channels);
}
// LFE mix
if (!listener.LFESeparation || LFE)
{
for (int channel = 0; channel < channels; ++channel)
{
if (Listener.Channels[channel].LFE)
{
WriteOutput(samples, rendered, volume3D, channel, channels);
}
}
}
}
// ------------------------------------------------------------------
// Directional/distance-based engine for asymmetrical layouts
// ------------------------------------------------------------------
else
{
// Angle match calculations
float[] angleMatches;
if (listener.AudioQuality >= QualityModes.High)
{
angleMatches = CalculateAngleMatches(channels, direction);
}
else
{
angleMatches = LinearizeAngleMatches(channels, direction);
}
// Object size extension
if (Size != 0)
{
float maxAngleMatch = angleMatches[0];
for (int channel = 1; channel < channels; ++channel)
{
if (maxAngleMatch < angleMatches[channel])
{
maxAngleMatch = angleMatches[channel];
}
}
for (int channel = 0; channel < channels; ++channel)
{
angleMatches[channel] = QMath.Lerp(angleMatches[channel], maxAngleMatch, Size);
}
}
// Only use the closest 3 speakers on non-Perfect qualities or in Theatre mode
if (listener.AudioQuality != QualityModes.Perfect || Listener.EnvironmentType == Environments.Theatre)
{
float top0 = 0, top1 = 0, top2 = 0;
for (int channel = 0; channel < channels; ++channel)
{
if (!Listener.Channels[channel].LFE)
{
float match = angleMatches[channel];
if (top0 < match)
{
top2 = top1;
top1 = top0;
top0 = match;
}
else if (top1 < match)
{
top2 = top1;
top1 = match;
}
else if (top2 < match)
{
top2 = match;
}
}
}
for (int channel = 0; channel < channels; ++channel)
{
if (!Listener.Channels[channel].LFE &&
angleMatches[channel] != top0 && angleMatches[channel] != top1 &&
angleMatches[channel] != top2)
{
angleMatches[channel] = 0;
}
}
}
float totalAngleMatch = 0;
for (int channel = 0; channel < channels; ++channel)
{
totalAngleMatch += angleMatches[channel] * angleMatches[channel];
}
totalAngleMatch = (float)Math.Sqrt(totalAngleMatch);
// Place in sphere, write data to output channels
float volume3D = Volume * rolloffDistance * SpatialBlend / totalAngleMatch;
for (int channel = 0; channel < channels; ++channel)
{
if (Listener.Channels[channel].LFE)
{
if (!listener.LFESeparation || LFE)
{
WriteOutput(samples, rendered, volume3D * totalAngleMatch, channel, channels);
}
}
else if (!LFE && angleMatches[channel] != 0)
{
WriteOutput(samples, rendered, volume3D * angleMatches[channel], channel, channels);
}
}
}
}
}
// Timing
TimeSamples += PitchedUpdateRate;
if (TimeSamples >= Clip.Samples)
{
if (Loop)
{
TimeSamples %= Clip.Samples;
}
else
{
TimeSamples = 0;
IsPlaying = false;
}
}
return(rendered);
}
/// <summary>
/// Reads the next signed VINT from a stream, cuts the leading 1, reads the correct value.
/// </summary>
public static long ReadSignedValue(Stream reader)
{
long value = ReadTag(reader);
return(value - (3L << (QMath.BitsAfterMSB(value) - 1)) + 1);
}