bool EffectRepeat::Process()
{
this->CopyInputWaveTracks(); // Set up mOutputWaveTracks.
bool bGoodResult = true;
TrackListIterator iter(mOutputWaveTracks);
WaveTrack *track = (WaveTrack *) iter.First();
int nTrack = 0;
double maxDestLen = 0.0; // used to change selection to generated bit
while ((track != NULL) && bGoodResult) {
double trackStart = track->GetStartTime();
double trackEnd = track->GetEndTime();
double t0 = mT0 < trackStart? trackStart: mT0;
double t1 = mT1 > trackEnd? trackEnd: mT1;
if (t1 <= t0)
continue;
sampleCount start = track->TimeToLongSamples(t0);
sampleCount end = track->TimeToLongSamples(t1);
sampleCount len = (sampleCount)(end - start);
double tLen = track->LongSamplesToTime(len);
double tc = t0 + tLen;
if (len <= 0)
continue;
Track *dest;
track->Copy(t0, t1, &dest);
for(int j=0; j<repeatCount; j++)
{
if (!track->Paste(tc, dest) ||
TrackProgress(nTrack, j / repeatCount)) // TrackProgress returns true on Cancel.
{
bGoodResult = false;
break;
}
tc += tLen;
}
if (tc > maxDestLen)
maxDestLen = tc;
delete dest;
track = (WaveTrack *) iter.Next();
nTrack++;
}
if (bGoodResult)
{
// Change selection to just the generated bits.
mT0 = mT1;
mT1 = maxDestLen;
}
this->ReplaceProcessedWaveTracks(bGoodResult);
return bGoodResult;
}
bool EffectRepeat::Process()
{
// Set up mOutputTracks.
// This effect needs Track::All for sync-lock grouping.
CopyInputTracks(Track::All);
int nTrack = 0;
bool bGoodResult = true;
double maxDestLen = 0.0; // used to change selection to generated bit
TrackListIterator iter(mOutputTracks);
for (Track *t = iter.First(); t && bGoodResult; t = iter.Next())
{
if (t->GetKind() == Track::Label)
{
if (t->GetSelected() || t->IsSyncLockSelected())
{
LabelTrack* track = (LabelTrack*)t;
if (!track->Repeat(mT0, mT1, repeatCount))
{
bGoodResult = false;
break;
}
}
}
else if (t->GetKind() == Track::Wave && t->GetSelected())
{
WaveTrack* track = (WaveTrack*)t;
sampleCount start = track->TimeToLongSamples(mT0);
sampleCount end = track->TimeToLongSamples(mT1);
sampleCount len = (sampleCount)(end - start);
double tLen = track->LongSamplesToTime(len);
double tc = mT0 + tLen;
if (len <= 0)
{
continue;
}
auto dest = track->Copy(mT0, mT1);
for(int j=0; j<repeatCount; j++)
{
if (!track->Paste(tc, dest.get()) ||
TrackProgress(nTrack, j / repeatCount)) // TrackProgress returns true on Cancel.
{
bGoodResult = false;
break;
}
tc += tLen;
}
if (tc > maxDestLen)
maxDestLen = tc;
nTrack++;
}
else if (t->IsSyncLockSelected())
{
t->SyncLockAdjust(mT1, mT1 + (mT1 - mT0) * repeatCount);
}
}
if (bGoodResult)
{
// Select the NEW bits + original bit
mT1 = maxDestLen;
}
ReplaceProcessedTracks(bGoodResult);
return bGoodResult;
}
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;
}