bool EffectNoiseRemoval::PromptUser()
{
NoiseRemovalDialog dlog(this, mParent);
dlog.mSensitivity = mSensitivity;
dlog.mGain = -mNoiseGain;
dlog.mFreq = mFreqSmoothingHz;
dlog.mTime = mAttackDecayTime;
dlog.mbLeaveNoise = mbLeaveNoise;
dlog.mKeepSignal->SetValue(!mbLeaveNoise);
dlog.mKeepNoise->SetValue(mbLeaveNoise);
// We may want to twiddle the levels if we are setting
// from an automation dialog, the only case in which we can
// get here without any wavetracks.
bool bAllowTwiddleSettings = (GetNumWaveTracks() == 0);
if (mHasProfile || bAllowTwiddleSettings) {
dlog.m_pButton_Preview->Enable(GetNumWaveTracks() != 0);
dlog.m_pButton_RemoveNoise->SetDefault();
} else {
dlog.m_pButton_Preview->Enable(false);
dlog.m_pButton_RemoveNoise->Enable(false);
}
dlog.TransferDataToWindow();
dlog.mKeepNoise->SetValue(dlog.mbLeaveNoise);
dlog.CentreOnParent();
dlog.ShowModal();
if (dlog.GetReturnCode() == 0) {
return false;
}
mSensitivity = dlog.mSensitivity;
mNoiseGain = -dlog.mGain;
mFreqSmoothingHz = dlog.mFreq;
mAttackDecayTime = dlog.mTime;
mbLeaveNoise = dlog.mbLeaveNoise;
gPrefs->Write(wxT("/Effects/NoiseRemoval/NoiseSensitivity"), mSensitivity);
gPrefs->Write(wxT("/Effects/NoiseRemoval/NoiseGain"), mNoiseGain);
gPrefs->Write(wxT("/Effects/NoiseRemoval/NoiseFreqSmoothing"), mFreqSmoothingHz);
gPrefs->Write(wxT("/Effects/NoiseRemoval/NoiseAttackDecayTime"), mAttackDecayTime);
gPrefs->Write(wxT("/Effects/NoiseRemoval/NoiseLeaveNoise"), mbLeaveNoise);
mDoProfile = (dlog.GetReturnCode() == 1);
return gPrefs->Flush();
}
void EffectSineSweepGenerator::BeforeGenerate()
{
#ifdef __AUDEBUG__
printf("elsg: BEFOREGENERATE\n"); fflush(stdout);
printf("elsg: detected %d tracks\n", int(GetNumWaveTracks())); fflush(stdout);
#endif
// These lines add new tracks if needed
int existingTracks = GetNumWaveTracks();
int neededTracks = m_pSsg->GetNeededTracks();
//If there are selected tracks it's a mess, better deselect all first...
int i = 1;
if(existingTracks > 1)
{
DeselectAllTracks();
i = 0;
}
while(i < neededTracks)
{
WaveTrack *t = mFactory->NewWaveTrack(floatSample, mProjectRate);
mTracks->Add(t);
t->SetSelected(true);
i++;
}
// Select all tracks
i = 1;
wxString name;
TrackListIterator iter(mTracks);
for (Track *t = iter.First(); t; t = iter.Next())
{
name.Printf(_("Sweep Channel %d"), i);
if(m_pSsg->IsControlPulsesSet()) {
if(i == (neededTracks-1)) name = _("Inverse Filter");
if(i == neededTracks) name = _("Pulses Channel");
}
else
{
if(i == neededTracks) name = _("Inverse Filter");
}
t->SetName(name);
i++;
}
}
bool EffectTruncSilence::Analyze(RegionList& silenceList,
RegionList& trackSilences,
WaveTrack* wt,
sampleCount* silentFrame,
sampleCount* index,
int whichTrack,
double* inputLength /*= NULL*/,
double* minInputLength /*= NULL*/)
{
// Smallest silent region to detect in frames
sampleCount minSilenceFrames = sampleCount(std::max( mInitialAllowedSilence, DEF_MinTruncMs) * wt->GetRate());
double truncDbSilenceThreshold = Enums::Db2Signal[mTruncDbChoiceIndex];
sampleCount blockLen = wt->GetMaxBlockSize();
sampleCount start = wt->TimeToLongSamples(mT0);
sampleCount end = wt->TimeToLongSamples(mT1);
sampleCount outLength = 0;
double previewLength;
gPrefs->Read(wxT("/AudioIO/EffectsPreviewLen"), &previewLength, 6.0);
// Minimum required length in samples.
const sampleCount previewLen = previewLength * wt->GetRate();
// Keep position in overall silences list for optimization
RegionList::iterator rit(silenceList.begin());
// Allocate buffer
float *buffer = new float[blockLen];
// Loop through current track
while (*index < end) {
if (inputLength && ((outLength >= previewLen) || (*index - start > wt->TimeToLongSamples(*minInputLength)))) {
*inputLength = std::min<double>(*inputLength, *minInputLength);
if (outLength >= previewLen) {
*minInputLength = *inputLength;
}
return true;
}
if (!inputLength) {
// Show progress dialog, test for cancellation
bool cancelled = TotalProgress(
detectFrac * (whichTrack + (*index - start) / (double)(end - start)) /
(double)GetNumWaveTracks());
if (cancelled) {
delete [] buffer;
return false;
}
}
// Optimization: if not in a silent region skip ahead to the next one
double curTime = wt->LongSamplesToTime(*index);
for ( ; rit != silenceList.end(); ++rit) {
// Find the first silent region ending after current time
if (rit->end >= curTime) {
break;
}
}
if (rit == silenceList.end()) {
// No more regions -- no need to process the rest of the track
if (inputLength) {
// Add available samples up to previewLength.
sampleCount remainingTrackSamples = wt->TimeToLongSamples(wt->GetEndTime()) - *index;
sampleCount requiredTrackSamples = previewLen - outLength;
outLength += (remainingTrackSamples > requiredTrackSamples)? requiredTrackSamples : remainingTrackSamples;
}
break;
}
else if (rit->start > curTime) {
// End current silent region, skip ahead
if (*silentFrame >= minSilenceFrames) {
trackSilences.push_back(Region(
wt->LongSamplesToTime(*index - *silentFrame),
wt->LongSamplesToTime(*index)
));
}
*silentFrame = 0;
sampleCount newIndex = wt->TimeToLongSamples(rit->start);
if (inputLength) {
sampleCount requiredTrackSamples = previewLen - outLength;
// Add non-silent sample to outLength
outLength += ((newIndex - *index) > requiredTrackSamples)? requiredTrackSamples : newIndex - *index;
}
*index = newIndex;
}
// End of optimization
// Limit size of current block if we've reached the end
sampleCount count = blockLen;
if ((*index + count) > end) {
count = end - *index;
}
// Fill buffer
wt->Get((samplePtr)(buffer), floatSample, *index, count);
// Look for silenceList in current block
for (sampleCount i = 0; i < count; ++i) {
if (inputLength && ((outLength >= previewLen) || (outLength > wt->TimeToLongSamples(*minInputLength)))) {
*inputLength = wt->LongSamplesToTime(*index + i) - wt->LongSamplesToTime(start);
break;
}
if (fabs(buffer[i]) < truncDbSilenceThreshold) {
(*silentFrame)++;
}
else {
sampleCount allowed = 0;
if (*silentFrame >= minSilenceFrames) {
if (inputLength) {
switch (mActionIndex) {
case kTruncate:
outLength += wt->TimeToLongSamples(mTruncLongestAllowedSilence);
break;
case kCompress:
allowed = wt->TimeToLongSamples(mInitialAllowedSilence);
outLength += allowed +
(*silentFrame - allowed) * mSilenceCompressPercent / 100.0;
break;
// default: // Not currently used.
}
}
// Record the silent region
Region *r = new Region;
r->start = wt->LongSamplesToTime(*index + i - *silentFrame);
r->end = wt->LongSamplesToTime(*index + i);
trackSilences.push_back(Region(
wt->LongSamplesToTime(*index + i - *silentFrame),
wt->LongSamplesToTime(*index + i)
));
}
else if (inputLength) { // included as part of non-silence
outLength += *silentFrame;
}
*silentFrame = 0;
if (inputLength) {
++outLength; // Add non-silent sample to outLength
}
}
}
// Next block
*index += count;
}
delete [] buffer;
if (inputLength) {
*inputLength = std::min<double>(*inputLength, *minInputLength);
if (outLength >= previewLen) {
*minInputLength = *inputLength;
}
}
return true;
}
// this currently does an exponential fade
bool EffectAutoDuck::ApplyDuckFade(int trackNumber, WaveTrack* t,
double t0, double t1)
{
bool cancel = false;
sampleCount start = t->TimeToLongSamples(t0);
sampleCount end = t->TimeToLongSamples(t1);
float *buf = new float[kBufSize];
sampleCount pos = start;
int fadeDownSamples = t->TimeToLongSamples(
mOuterFadeDownLen + mInnerFadeDownLen);
if (fadeDownSamples < 1)
fadeDownSamples = 1;
int fadeUpSamples = t->TimeToLongSamples(
mOuterFadeUpLen + mInnerFadeUpLen);
if (fadeUpSamples < 1)
fadeUpSamples = 1;
float fadeDownStep = mDuckAmountDb / fadeDownSamples;
float fadeUpStep = mDuckAmountDb / fadeUpSamples;
while (pos < end)
{
sampleCount len = end - pos;
if (len > kBufSize)
len = kBufSize;
t->Get((samplePtr)buf, floatSample, pos, len);
for (sampleCount i = pos; i < pos + len; i++)
{
float gainDown = fadeDownStep * (i - start);
float gainUp = fadeUpStep * (end - i);;
float gain;
if (gainDown > gainUp)
gain = gainDown;
else
gain = gainUp;
if (gain < mDuckAmountDb)
gain = mDuckAmountDb;
buf[i - pos] *= DB_TO_LINEAR(gain);
}
t->Set((samplePtr)buf, floatSample, pos, len);
pos += len;
float curTime = t->LongSamplesToTime(pos);
float fractionFinished = (curTime - mT0) / (mT1 - mT0);
if (TotalProgress( (trackNumber + 1 + fractionFinished) /
(GetNumWaveTracks() + 1) ))
{
cancel = true;
break;
}
}
delete[] buf;
return cancel;
}
bool EffectAutoDuck::Process()
{
sampleCount i;
if (GetNumWaveTracks() == 0 || !mControlTrack)
return false;
bool cancel = false;
sampleCount start =
mControlTrack->TimeToLongSamples(mT0 + mOuterFadeDownLen);
sampleCount end =
mControlTrack->TimeToLongSamples(mT1 - mOuterFadeUpLen);
if (end <= start)
return false;
// the minimum number of samples we have to wait until the maximum
// pause has been exceeded
double maxPause = mMaximumPause;
// We don't fade in until we have time enough to actually fade out again
if (maxPause < mOuterFadeDownLen + mOuterFadeUpLen)
maxPause = mOuterFadeDownLen + mOuterFadeUpLen;
sampleCount minSamplesPause =
mControlTrack->TimeToLongSamples(maxPause);
double threshold = DB_TO_LINEAR(mThresholdDb);
// adjust the threshold so we can compare it to the rmsSum value
threshold = threshold * threshold * kRMSWindowSize;
int rmsPos = 0;
float rmsSum = 0;
float *rmsWindow = new float[kRMSWindowSize];
for (i = 0; i < kRMSWindowSize; i++)
rmsWindow[i] = 0;
float *buf = new float[kBufSize];
bool inDuckRegion = false;
// initialize the following two variables to prevent compiler warning
double duckRegionStart = 0;
sampleCount curSamplesPause = 0;
// to make the progress bar appear more natural, we first look for all
// duck regions and apply them all at once afterwards
AutoDuckRegionArray regions;
sampleCount pos = start;
while (pos < end)
{
sampleCount len = end - pos;
if (len > kBufSize)
len = kBufSize;
mControlTrack->Get((samplePtr)buf, floatSample, pos, (sampleCount)len);
for (i = pos; i < pos + len; i++)
{
rmsSum -= rmsWindow[rmsPos];
rmsWindow[rmsPos] = buf[i - pos] * buf[i - pos];
rmsSum += rmsWindow[rmsPos];
rmsPos = (rmsPos + 1) % kRMSWindowSize;
bool thresholdExceeded = rmsSum > threshold;
if (thresholdExceeded)
{
// everytime the threshold is exceeded, reset our count for
// the number of pause samples
curSamplesPause = 0;
if (!inDuckRegion)
{
// the threshold has been exceeded for the first time, so
// let the duck region begin here
inDuckRegion = true;
duckRegionStart = mControlTrack->LongSamplesToTime(i);
}
}
if (!thresholdExceeded && inDuckRegion)
{
// the threshold has not been exceeded and we are in a duck
// region, but only fade in if the maximum pause has been
// exceeded
curSamplesPause += 1;
if (curSamplesPause >= minSamplesPause)
{
// do the actual duck fade and reset all values
double duckRegionEnd =
mControlTrack->LongSamplesToTime(i - curSamplesPause);
regions.Add(AutoDuckRegion(
duckRegionStart - mOuterFadeDownLen,
duckRegionEnd + mOuterFadeUpLen));
inDuckRegion = false;
}
}
}
pos += len;
if (TotalProgress( ((double)(pos-start)) / (end-start) /
(GetNumWaveTracks() + 1) ))
{
cancel = true;
break;
}
}
// apply last duck fade, if any
if (inDuckRegion)
{
double duckRegionEnd =
mControlTrack->LongSamplesToTime(end - curSamplesPause);
regions.Add(AutoDuckRegion(
duckRegionStart - mOuterFadeDownLen,
duckRegionEnd + mOuterFadeUpLen));
}
delete[] buf;
delete[] rmsWindow;
if (!cancel)
{
CopyInputTracks(); // Set up mOutputTracks.
SelectedTrackListOfKindIterator iter(Track::Wave, mOutputTracks);
Track *iterTrack = iter.First();
int trackNumber = 0;
while (iterTrack)
{
wxASSERT(iterTrack->GetKind() == Track::Wave);
WaveTrack* t = (WaveTrack*)iterTrack;
for (i = 0; i < (int)regions.GetCount(); i++)
{
const AutoDuckRegion& region = regions[i];
if (ApplyDuckFade(trackNumber, t, region.t0, region.t1))
{
cancel = true;
break;
}
}
if (cancel)
break;
iterTrack = iter.Next();
trackNumber++;
}
}
ReplaceProcessedTracks(!cancel);
return !cancel;
}
//ProcessOne() takes a track, transforms it to bunch of buffer-blocks,
//and executes ProcessSimpleMono on these blocks
bool EffectTwoPassSimpleMono::ProcessOne(WaveTrack * track,
sampleCount start, sampleCount end)
{
bool ret;
sampleCount s, samples1, samples2, tmpcount;
float *tmpfloat;
//Get the length of the buffer (as double). len is
//used simple to calculate a progress meter, so it is easier
//to make it a double now than it is to do it later
double len = (double)(end - start);
sampleCount maxblock = track->GetMaxBlockSize();
//Initiate a processing buffer. This buffer will (most likely)
//be shorter than the length of the track being processed.
float *buffer1 = new float[maxblock];
float *buffer2 = new float[maxblock];
samples1 = track->GetBestBlockSize(start);
if(start + samples1 > end)
samples1 = end - start;
if(samples1 > maxblock)
samples1 = maxblock;
//Get the samples from the track and put them in the buffer
track->Get((samplePtr) buffer1, floatSample, start, samples1);
// Process the first buffer with a NULL previous buffer
if (mPass == 0)
ret = TwoBufferProcessPass1(NULL, 0, buffer1, samples1);
else
ret = TwoBufferProcessPass2(NULL, 0, buffer1, samples1);
if (!ret) {
delete[]buffer1;
delete[]buffer2;
//Return false because the effect failed.
return false;
}
//Go through the track one buffer at a time. s counts which
//sample the current buffer starts at.
s = start + samples1;
while (s < end) {
//Get a block of samples (smaller than the size of the buffer)
samples2 = track->GetBestBlockSize(s);
if(samples2 > maxblock)
samples2 = maxblock;
//Adjust the block size if it is the final block in the track
if (s + samples2 > end)
samples2 = end - s;
//Get the samples from the track and put them in the buffer
track->Get((samplePtr) buffer2, floatSample, s, samples2);
//Process the buffer. If it fails, clean up and exit.
if (mPass == 0)
ret = TwoBufferProcessPass1(buffer1, samples1, buffer2, samples2);
else
ret = TwoBufferProcessPass2(buffer1, samples1, buffer2, samples2);
if (!ret) {
delete[]buffer1;
delete[]buffer2;
//Return false because the effect failed.
return false;
}
//Processing succeeded. copy the newly-changed samples back
//onto the track.
track->Set((samplePtr) buffer1, floatSample, s-samples1, samples1);
//Increment s one blockfull of samples
s += samples2;
//Update the Progress meter
if (mSecondPassDisabled)
ret = TotalProgress((mCurTrackNum + (s-start)/len) / GetNumWaveTracks());
else
ret = TotalProgress((mCurTrackNum + (s-start)/len + GetNumWaveTracks()*mPass)/ (GetNumWaveTracks()*2));
if (ret) {
delete[]buffer1;
delete[]buffer2;
//Return false because the effect failed.
return false;
}
// Rotate the buffers
tmpfloat = buffer1;
buffer1 = buffer2;
buffer2 = tmpfloat;
tmpcount = samples1;
samples1 = samples2;
samples2 = tmpcount;
}
// Send the last buffer with a NULL pointer for the current buffer
if (mPass == 0)
ret = TwoBufferProcessPass1(buffer1, samples1, NULL, 0);
else
ret = TwoBufferProcessPass2(buffer1, samples1, NULL, 0);
if (!ret) {
delete[]buffer1;
delete[]buffer2;
//Return false because the effect failed.
return false;
}
//Processing succeeded. copy the newly-changed samples back
//onto the track.
track->Set((samplePtr) buffer1, floatSample, s-samples1, samples1);
//Clean up the buffer
delete[]buffer1;
delete[]buffer2;
//Return true because the effect processing succeeded.
return true;
}
bool EffectTruncSilence::Process()
{
// Typical fraction of total time taken by detection (better to guess low)
const double detectFrac = .4;
// Copy tracks
this->CopyInputTracks(Track::All);
// Lower bound on the amount of silence to find at a time -- this avoids
// detecting silence repeatedly in low-frequency sounds.
const double minTruncMs = 0.001;
double truncDbSilenceThreshold = Enums::Db2Signal[mTruncDbChoiceIndex];
// Master list of silent regions; it is responsible for deleting them.
// This list should always be kept in order.
RegionList silences;
silences.DeleteContents(true);
// Start with the whole selection silent
Region *sel = new Region;
sel->start = mT0;
sel->end = mT1;
silences.push_back(sel);
// Remove non-silent regions in each track
SelectedTrackListOfKindIterator iter(Track::Wave, mTracks);
int whichTrack = 0;
for (Track *t = iter.First(); t; t = iter.Next())
{
WaveTrack *wt = (WaveTrack *)t;
// Smallest silent region to detect in frames
sampleCount minSilenceFrames =
sampleCount(wxMax( mInitialAllowedSilence, minTruncMs) *
wt->GetRate());
//
// Scan the track for silences
//
RegionList trackSilences;
trackSilences.DeleteContents(true);
sampleCount blockLen = wt->GetMaxBlockSize();
sampleCount start = wt->TimeToLongSamples(mT0);
sampleCount end = wt->TimeToLongSamples(mT1);
// Allocate buffer
float *buffer = new float[blockLen];
sampleCount index = start;
sampleCount silentFrames = 0;
bool cancelled = false;
// Keep position in overall silences list for optimization
RegionList::iterator rit(silences.begin());
while (index < end) {
// Show progress dialog, test for cancellation
cancelled = TotalProgress(
detectFrac * (whichTrack + index / (double)end) /
(double)GetNumWaveTracks());
if (cancelled)
break;
//
// Optimization: if not in a silent region skip ahead to the next one
//
double curTime = wt->LongSamplesToTime(index);
for ( ; rit != silences.end(); ++rit)
{
// Find the first silent region ending after current time
if ((*rit)->end >= curTime)
break;
}
if (rit == silences.end()) {
// No more regions -- no need to process the rest of the track
break;
}
else if ((*rit)->start > curTime) {
// End current silent region, skip ahead
if (silentFrames >= minSilenceFrames) {
Region *r = new Region;
r->start = wt->LongSamplesToTime(index - silentFrames);
r->end = wt->LongSamplesToTime(index);
trackSilences.push_back(r);
}
silentFrames = 0;
index = wt->TimeToLongSamples((*rit)->start);
}
//
// End of optimization
//
// Limit size of current block if we've reached the end
sampleCount count = blockLen;
if ((index + count) > end) {
count = end - index;
}
// Fill buffer
wt->Get((samplePtr)(buffer), floatSample, index, count);
// Look for silences in current block
for (sampleCount i = 0; i < count; ++i) {
if (fabs(buffer[i]) < truncDbSilenceThreshold) {
++silentFrames;
}
else {
if (silentFrames >= minSilenceFrames)
{
// Record the silent region
Region *r = new Region;
r->start = wt->LongSamplesToTime(index + i - silentFrames);
r->end = wt->LongSamplesToTime(index + i);
trackSilences.push_back(r);
}
silentFrames = 0;
}
}
// Next block
index += count;
}
delete [] buffer;
// Buffer has been freed, so we're OK to return if cancelled
if (cancelled)
{
ReplaceProcessedTracks(false);
return false;
}
if (silentFrames >= minSilenceFrames)
{
// Track ended in silence -- record region
Region *r = new Region;
r->start = wt->LongSamplesToTime(index - silentFrames);
r->end = wt->LongSamplesToTime(index);
trackSilences.push_back(r);
}
// Intersect with the overall silent region list
Intersect(silences, trackSilences);
whichTrack++;
}
//
// Now remove the silent regions from all selected / sync-lock selected tracks.
//
// Loop over detected regions in reverse (so cuts don't change time values
// down the line)
int whichReg = 0;
RegionList::reverse_iterator rit;
double totalCutLen = 0.0; // For cutting selection at the end
for (rit = silences.rbegin(); rit != silences.rend(); ++rit) {
Region *r = *rit;
// Progress dialog and cancellation. Do additional cleanup before return.
if (TotalProgress(detectFrac + (1 - detectFrac) * whichReg / (double)silences.size()))
{
ReplaceProcessedTracks(false);
return false;
}
// Intersection may create regions smaller than allowed; ignore them.
// Allow one nanosecond extra for consistent results with exact milliseconds of allowed silence.
if ((r->end - r->start) < (mInitialAllowedSilence - 0.000000001))
continue;
// Find new silence length as requested
double inLength = r->end - r->start;
double outLength;
switch (mProcessIndex) {
case 0:
outLength = wxMin(mTruncLongestAllowedSilence, inLength);
break;
case 1:
outLength = mInitialAllowedSilence +
(inLength - mInitialAllowedSilence) * mSilenceCompressPercent / 100.0;
break;
default: // Not currently used.
outLength = wxMin(mInitialAllowedSilence +
(inLength - mInitialAllowedSilence) * mSilenceCompressPercent / 100.0,
mTruncLongestAllowedSilence);
}
double cutLen = inLength - outLength;
totalCutLen += cutLen;
TrackListIterator iterOut(mOutputTracks);
for (Track *t = iterOut.First(); t; t = iterOut.Next())
{
// Don't waste time past the end of a track
if (t->GetEndTime() < r->start)
continue;
if (t->GetKind() == Track::Wave && (
t->GetSelected() || t->IsSyncLockSelected()))
{
// In WaveTracks, clear with a cross-fade
WaveTrack *wt = (WaveTrack *)t;
sampleCount blendFrames = mBlendFrameCount;
double cutStart = (r->start + r->end - cutLen) / 2;
double cutEnd = cutStart + cutLen;
// Round start/end times to frame boundaries
cutStart = wt->LongSamplesToTime(wt->TimeToLongSamples(cutStart));
cutEnd = wt->LongSamplesToTime(wt->TimeToLongSamples(cutEnd));
// Make sure the cross-fade does not affect non-silent frames
if (wt->LongSamplesToTime(blendFrames) > inLength) {
blendFrames = wt->TimeToLongSamples(inLength);
}
// Perform cross-fade in memory
float *buf1 = new float[blendFrames];
float *buf2 = new float[blendFrames];
sampleCount t1 = wt->TimeToLongSamples(cutStart) - blendFrames / 2;
sampleCount t2 = wt->TimeToLongSamples(cutEnd) - blendFrames / 2;
wt->Get((samplePtr)buf1, floatSample, t1, blendFrames);
wt->Get((samplePtr)buf2, floatSample, t2, blendFrames);
for (sampleCount i = 0; i < blendFrames; ++i) {
buf1[i] = ((blendFrames-i) * buf1[i] + i * buf2[i]) /
(double)blendFrames;
}
// Perform the cut
wt->Clear(cutStart, cutEnd);
// Write cross-faded data
wt->Set((samplePtr)buf1, floatSample, t1, blendFrames);
delete [] buf1;
delete [] buf2;
}
else if (t->GetSelected() || t->IsSyncLockSelected())
{
// Non-wave tracks: just do a sync-lock adjust
double cutStart = (r->start + r->end - cutLen) / 2;
double cutEnd = cutStart + cutLen;
t->SyncLockAdjust(cutEnd, cutStart);
}
}
++whichReg;
}
mT1 -= totalCutLen;
ReplaceProcessedTracks(true);
return true;
}
// this currently does an exponential fade
bool EffectAutoDuck::ApplyDuckFade(int trackNum, WaveTrack* t,
double t0, double t1)
{
bool cancel = false;
auto start = t->TimeToLongSamples(t0);
auto end = t->TimeToLongSamples(t1);
Floats buf{ kBufSize };
auto pos = start;
auto fadeDownSamples = t->TimeToLongSamples(
mOuterFadeDownLen + mInnerFadeDownLen);
if (fadeDownSamples < 1)
fadeDownSamples = 1;
auto fadeUpSamples = t->TimeToLongSamples(
mOuterFadeUpLen + mInnerFadeUpLen);
if (fadeUpSamples < 1)
fadeUpSamples = 1;
float fadeDownStep = mDuckAmountDb / fadeDownSamples.as_double();
float fadeUpStep = mDuckAmountDb / fadeUpSamples.as_double();
while (pos < end)
{
const auto len = limitSampleBufferSize( kBufSize, end - pos );
t->Get((samplePtr)buf.get(), floatSample, pos, len);
for (auto i = pos; i < pos + len; i++)
{
float gainDown = fadeDownStep * (i - start).as_float();
float gainUp = fadeUpStep * (end - i).as_float();
float gain;
if (gainDown > gainUp)
gain = gainDown;
else
gain = gainUp;
if (gain < mDuckAmountDb)
gain = mDuckAmountDb;
// i - pos is bounded by len:
buf[ ( i - pos ).as_size_t() ] *= DB_TO_LINEAR(gain);
}
t->Set((samplePtr)buf.get(), floatSample, pos, len);
pos += len;
float curTime = t->LongSamplesToTime(pos);
float fractionFinished = (curTime - mT0) / (mT1 - mT0);
if (TotalProgress( (trackNum + 1 + fractionFinished) /
(GetNumWaveTracks() + 1) ))
{
cancel = true;
break;
}
}
return cancel;
}
bool EffectAutoDuck::Process()
{
if (GetNumWaveTracks() == 0 || !mControlTrack)
return false;
bool cancel = false;
auto start =
mControlTrack->TimeToLongSamples(mT0 + mOuterFadeDownLen);
auto end =
mControlTrack->TimeToLongSamples(mT1 - mOuterFadeUpLen);
if (end <= start)
return false;
// the minimum number of samples we have to wait until the maximum
// pause has been exceeded
double maxPause = mMaximumPause;
// We don't fade in until we have time enough to actually fade out again
if (maxPause < mOuterFadeDownLen + mOuterFadeUpLen)
maxPause = mOuterFadeDownLen + mOuterFadeUpLen;
auto minSamplesPause =
mControlTrack->TimeToLongSamples(maxPause);
double threshold = DB_TO_LINEAR(mThresholdDb);
// adjust the threshold so we can compare it to the rmsSum value
threshold = threshold * threshold * kRMSWindowSize;
int rmsPos = 0;
float rmsSum = 0;
// to make the progress bar appear more natural, we first look for all
// duck regions and apply them all at once afterwards
std::vector<AutoDuckRegion> regions;
bool inDuckRegion = false;
{
Floats rmsWindow{ kRMSWindowSize, true };
Floats buf{ kBufSize };
// initialize the following two variables to prevent compiler warning
double duckRegionStart = 0;
sampleCount curSamplesPause = 0;
auto pos = start;
while (pos < end)
{
const auto len = limitSampleBufferSize( kBufSize, end - pos );
mControlTrack->Get((samplePtr)buf.get(), floatSample, pos, len);
for (auto i = pos; i < pos + len; i++)
{
rmsSum -= rmsWindow[rmsPos];
// i - pos is bounded by len:
auto index = ( i - pos ).as_size_t();
rmsWindow[rmsPos] = buf[ index ] * buf[ index ];
rmsSum += rmsWindow[rmsPos];
rmsPos = (rmsPos + 1) % kRMSWindowSize;
bool thresholdExceeded = rmsSum > threshold;
if (thresholdExceeded)
{
// everytime the threshold is exceeded, reset our count for
// the number of pause samples
curSamplesPause = 0;
if (!inDuckRegion)
{
// the threshold has been exceeded for the first time, so
// let the duck region begin here
inDuckRegion = true;
duckRegionStart = mControlTrack->LongSamplesToTime(i);
}
}
if (!thresholdExceeded && inDuckRegion)
{
// the threshold has not been exceeded and we are in a duck
// region, but only fade in if the maximum pause has been
// exceeded
curSamplesPause += 1;
if (curSamplesPause >= minSamplesPause)
{
// do the actual duck fade and reset all values
double duckRegionEnd =
mControlTrack->LongSamplesToTime(i - curSamplesPause);
regions.push_back(AutoDuckRegion(
duckRegionStart - mOuterFadeDownLen,
duckRegionEnd + mOuterFadeUpLen));
inDuckRegion = false;
}
}
}
pos += len;
if (TotalProgress(
(pos - start).as_double() /
(end - start).as_double() /
(GetNumWaveTracks() + 1)
))
{
cancel = true;
break;
}
}
// apply last duck fade, if any
if (inDuckRegion)
{
double duckRegionEnd =
mControlTrack->LongSamplesToTime(end - curSamplesPause);
regions.push_back(AutoDuckRegion(
duckRegionStart - mOuterFadeDownLen,
duckRegionEnd + mOuterFadeUpLen));
}
}
if (!cancel)
{
CopyInputTracks(); // Set up mOutputTracks.
SelectedTrackListOfKindIterator iter(Track::Wave, mOutputTracks.get());
Track *iterTrack = iter.First();
int trackNum = 0;
while (iterTrack)
{
WaveTrack* t = (WaveTrack*)iterTrack;
for (size_t i = 0; i < regions.size(); i++)
{
const AutoDuckRegion& region = regions[i];
if (ApplyDuckFade(trackNum, t, region.t0, region.t1))
{
cancel = true;
break;
}
}
if (cancel)
break;
iterTrack = iter.Next();
trackNum++;
}
}
ReplaceProcessedTracks(!cancel);
return !cancel;
}
