void OnAudioFilterRead(float[] bufferData, int bufferChannels)
{
CopyContext ctx;
ctx.bufferData = bufferData;
ctx.bufferChannels = bufferChannels;
ctx.bufferFreq = sampleRate;
ctx.playbackSpeed = speed;
ctx.outputValue = 0.0f;
if (clearHitsounds)
{
hitsoundEvents.Clear();
hitSoundEnd = new QNT_Timestamp(0);
clearHitsounds = false;
}
if (clearClicksounds)
{
clickTrackEvents.Clear();
clearClicksounds = false;
}
if (newPreviewHitsoundEvents != null)
{
List <HitsoundEvent> newPreview = newPreviewHitsoundEvents;
newPreviewHitsoundEvents = null;
previewHitsoundEvents.Clear();
previewHitsoundEvents = newPreview;
}
if (playPreview)
{
int dataIndex = 0;
while (dataIndex < bufferData.Length / bufferChannels && (preview.currentSample < currentPreviewSongSampleEnd) && (preview.scaledCurrentSample) < song.samples.Length)
{
ctx.index = dataIndex;
ctx.volume = volume;
ctx.playbackSpeed = speed;
preview.CopySampleIntoBuffer(ctx);
PlayHitsounds(ctx, previewHitsoundEvents);
++dataIndex;
}
if (preview.currentSample >= currentPreviewSongSampleEnd || (preview.scaledCurrentSample) >= song.samples.Length)
{
playPreview = false;
}
}
if (paused || (song.scaledCurrentSample) > song.samples.Length)
{
hitsoundEvents.Clear();
//Continue to flush the hitsounds
if (!playPreview && previewHitsoundEvents.Count > 0)
{
int dataIndex = 0;
while (dataIndex < bufferData.Length / bufferChannels)
{
ctx.index = dataIndex;
ctx.volume = hitSoundVolume;
PlayHitsounds(ctx, previewHitsoundEvents);
++dataIndex;
}
}
return;
}
if (song != null)
{
QNT_Timestamp timeStart = timeline.ShiftTick(new QNT_Timestamp(0), (float)song.currentTime);
QNT_Timestamp timeEnd = timeline.ShiftTick(new QNT_Timestamp(0), (float)(song.currentTime + (bufferData.Length / bufferChannels) / (float)song.frequency * (song.frequency / (float)sampleRate)));
if (timeEnd > hitSoundEnd)
{
hitSoundEnd = timeStart + Constants.QuarterNoteDuration;
AddHitsoundEvents(hitsoundEvents, timeStart, hitSoundEnd);
}
}
for (int dataIndex = 0; dataIndex < bufferData.Length / bufferChannels; dataIndex++)
{
ctx.volume = volume;
ctx.index = dataIndex;
ctx.playbackSpeed = speed;
song.CopySampleIntoBuffer(ctx);
if (songExtra != null)
{
songExtra.CopySampleIntoBuffer(ctx);
}
//Play hitsounds (reverse iterate so we can remove)
ctx.volume = hitSoundVolume;
PlayHitsounds(ctx, hitsoundEvents);
ctx.playbackSpeed = speed;
if (leftSustain != null)
{
ctx.volume = leftSustainVolume;
leftSustain.CopySampleIntoBuffer(ctx);
}
if (rightSustain != null)
{
ctx.volume = rightSustainVolume;
rightSustain.CopySampleIntoBuffer(ctx);
}
QNT_Timestamp currentTick = timeline.ShiftTick(new QNT_Timestamp(0), (float)GetTimeFromCurrentSample());
TempoChange currentTempo = timeline.GetTempoForTime(currentTick);
QNT_Duration timeSignatureDuration = new QNT_Duration(Constants.PulsesPerWholeNote / currentTempo.timeSignature.Denominator);
if (playMetronome)
{
if (GetTimeFromCurrentSample() > nextMetronomeTick)
{
metronomeSamplesLeft = (int)(sampleRate * metronomeTickLength);
nextMetronomeTick = 0;
}
if (nextMetronomeTick == 0)
{
QNT_Timestamp nextBeat = timeline.GetClosestBeatSnapped(timeline.ShiftTick(new QNT_Timestamp(0), (float)GetTimeFromCurrentSample()) + timeSignatureDuration, currentTempo.timeSignature.Denominator);
nextMetronomeTick = timeline.TimestampToSeconds(nextBeat);
}
}
//Metronome
if (metronomeSamplesLeft > 0)
{
const uint MetronomeTickFreq = 817;
const uint BigMetronomeTickFreq = 1024;
QNT_Timestamp tempoStart = currentTempo.time;
uint tickFreq = 0;
UInt64 currentBeatInBar = ((currentTick.tick - tempoStart.tick) / timeSignatureDuration.tick) % currentTempo.timeSignature.Numerator;
if (currentBeatInBar == 0)
{
tickFreq = BigMetronomeTickFreq;
}
else
{
tickFreq = MetronomeTickFreq;
}
for (int c = 0; c < bufferChannels; ++c)
{
int totalMetroSamples = (int)(sampleRate * metronomeTickLength);
float metro = Mathf.Sin(Mathf.PI * 2 * tickFreq * ((totalMetroSamples - metronomeSamplesLeft) / (float)totalMetroSamples) * metronomeTickLength) * 0.33f;
bufferData[dataIndex * bufferChannels + c] = Mathf.Clamp(bufferData[dataIndex * bufferChannels + c] + metro, -1.0f, 1.0f);
}
metronomeSamplesLeft -= 1;
}
if (playClickTrack && currentTick < clickTrackEndTime)
{
ctx.volume = volume;
ctx.index = dataIndex;
ctx.playbackSpeed = 1.0f;
GenerateClickTrackSamples(ctx, currentTick, currentTempo, timeSignatureDuration);
}
}
}
void AddHitsoundEvents(List <HitsoundEvent> events, QNT_Timestamp start, QNT_Timestamp end)
{
if (Timeline.orderedNotes.Count == 0)
{
return;
}
if (start > end)
{
QNT_Timestamp temp = start;
start = end;
end = temp;
}
float startTime = timeline.TimestampToSeconds(start);
foreach (Target t in new NoteEnumerator(start, end))
{
TargetData data = t.data;
if (data.time < start)
{
continue;
}
if (data.time > end)
{
return;
}
bool added = false;
foreach (HitsoundEvent ev in events)
{
if (ev.ID == data.ID)
{
added = true;
break;
}
}
if (!added)
{
HitsoundEvent ev;
ev.ID = data.ID;
ev.currentSample = 0;
ev.waitSamples = (UInt64)((timeline.TimestampToSeconds(data.time) - startTime) * sampleRate) << ClipData.PrecisionShift;
ev.sound = kick;
ev.time = data.time;
ev.pan = (data.x / 7.15f);
ev.volume = 1.0f;
ev.xPos = data.x;
switch (data.velocity)
{
case TargetVelocity.Standard:
ev.sound = kick;
break;
case TargetVelocity.Percussion:
ev.sound = percussion;
break;
case TargetVelocity.Snare:
ev.sound = snare;
break;
case TargetVelocity.Chain:
ev.sound = chainNote;
break;
case TargetVelocity.ChainStart:
ev.sound = chainStart;
break;
case TargetVelocity.Melee:
ev.sound = melee;
break;
case TargetVelocity.Mine:
ev.sound = mine;
break;
default:
continue;
}
//Only one hitsound at a time per point in time
for (int j = events.Count - 1; j >= 0; j--)
{
if (events[j].sound == ev.sound)
{
if (events[j].waitSamples == ev.waitSamples)
{
events.RemoveAt(j);
}
}
}
events.Add(ev);
}
}
}
public void PlayClickTrack(QNT_Timestamp endTime)
{
playClickTrack = true;
clickTrackEndTime = endTime;
clickTrackNextTick = 0;
}
public static QNT_Timestamp GetSnappedValue(QNT_Timestamp time, uint beatSnap)
{
QNT_Duration snapValue = Constants.DurationFromBeatSnap(beatSnap);
return((time / snapValue) * snapValue);
}
public static List <float> Detect(ClipData src, Timeline timeline, QNT_Timestamp start, QNT_Timestamp end)
{
for (int i = 0; i < bpmMatchDatas.Length; i++)
{
bpmMatchDatas[i].match = 0f;
}
if (start == end)
{
return(new List <float>());
}
if (end < start)
{
QNT_Timestamp temp = start;
start = end;
end = temp;
}
float startTime = timeline.TimestampToSeconds(start);
float endTime = timeline.TimestampToSeconds(end);
int channels = src.channels;
int frequency = src.frequency;
uint numSamples = (uint)(frequency * (endTime - startTime) * channels);
int splitFrameSize = BASE_SPLIT_SAMPLE_SIZE;
var volumeArr = new float[Mathf.CeilToInt((float)src.samples.Length / (float)splitFrameSize)];
int powerIndex = 0;
// Sample data analysis start
for (int sampleIndex = 0; sampleIndex < src.samples.Length; sampleIndex += splitFrameSize)
{
float sum = 0f;
for (int frameIndex = sampleIndex; frameIndex < sampleIndex + splitFrameSize; frameIndex++)
{
if (src.samples.Length <= frameIndex)
{
break;
}
// Use the absolute value, because left and right value is -1 to 1
float absValue = Mathf.Abs(src.samples[frameIndex]);
if (absValue > 1f)
{
continue;
}
// Calculate the amplitude square sum
sum += (absValue * absValue);
}
// Set volume value
volumeArr[powerIndex] = Mathf.Sqrt(sum / splitFrameSize);
powerIndex++;
}
// Representing a volume value from 0 to 1
float maxVolume = volumeArr.Max();
for (int i = 0; i < volumeArr.Length; i++)
{
volumeArr[i] = volumeArr[i] / maxVolume;
}
// Create volume diff list
var diffList = new List <float>();
for (int i = 1; i < volumeArr.Length; i++)
{
diffList.Add(Mathf.Max(volumeArr[i] - volumeArr[i - 1], 0f));
}
// Calculate the degree of coincidence in each BPM
int index = 0;
float splitFrequency = (float)frequency / (float)splitFrameSize;
for (int bpm = MIN_BPM; bpm <= MAX_BPM; bpm++)
{
float sinMatch = 0f;
float cosMatch = 0f;
float bps = (float)bpm / 60f;
if (diffList.Count > 0)
{
for (int i = 0; i < diffList.Count; i++)
{
sinMatch += (diffList[i] * Mathf.Cos(i * 2f * Mathf.PI * bps / splitFrequency));
cosMatch += (diffList[i] * Mathf.Sin(i * 2f * Mathf.PI * bps / splitFrequency));
}
sinMatch *= (1f / (float)diffList.Count);
cosMatch *= (1f / (float)diffList.Count);
}
float match = Mathf.Sqrt((sinMatch * sinMatch) + (cosMatch * cosMatch));
bpmMatchDatas[index].bpm = bpm;
bpmMatchDatas[index].match = match;
index++;
}
// Returns a high degree of coincidence BPM
int matchIndex = Array.FindIndex(bpmMatchDatas, x => x.match == bpmMatchDatas.Max(y => y.match));
var sort = bpmMatchDatas.OrderBy(x => x.match).Reverse().ToList();
List <float> results = new List <float>();
for (int i = 0; i < 10; ++i)
{
results.Add(sort[i].bpm);
}
return(results);
}
public int CompareTo(QNT_Timestamp other)
{
return(tick.CompareTo(other.tick));
}