bool EffectCompressor::InitPass1()
{
mMax=0.0;
if (!mNormalize)
DisableSecondPass();
// Find the maximum block length required for any track
size_t maxlen = 0;
SelectedTrackListOfKindIterator iter(Track::Wave, inputTracks());
WaveTrack *track = (WaveTrack *) iter.First();
while (track) {
maxlen = std::max(maxlen, track->GetMaxBlockSize());
//Iterate to the next track
track = (WaveTrack *) iter.Next();
}
mFollow1.reset();
mFollow2.reset();
// Allocate buffers for the envelope
if(maxlen > 0) {
mFollow1.reinit(maxlen);
mFollow2.reinit(maxlen);
}
mFollowLen = maxlen;
return true;
}
double EffectTruncSilence::CalcPreviewInputLength(double /* previewLength */)
{
double inputLength = mT1 - mT0;
double minInputLength = inputLength;
// Master list of silent regions
RegionList silences;
// Start with the whole selection silent
silences.push_back(Region(mT0, mT1));
SelectedTrackListOfKindIterator iter(Track::Wave, inputTracks());
int whichTrack = 0;
for (Track *t = iter.First(); t; t = iter.Next()) {
WaveTrack *const wt = static_cast<WaveTrack *>(t);
RegionList trackSilences;
auto index = wt->TimeToLongSamples(mT0);
sampleCount silentFrame = 0; // length of the current silence
Analyze(silences, trackSilences, wt, &silentFrame, &index, whichTrack, &inputLength, &minInputLength);
whichTrack++;
}
return inputLength;
}
bool EffectScienFilter::Init()
{
int selcount = 0;
double rate = 0.0;
TrackListOfKindIterator iter(Track::Wave, inputTracks());
WaveTrack *t = (WaveTrack *) iter.First();
mNyquist = (t ? t->GetRate() : GetActiveProject()->GetRate()) / 2.0;
while (t)
{
if (t->GetSelected())
{
if (selcount == 0)
{
rate = t->GetRate();
}
else
{
if (t->GetRate() != rate)
{
Effect::MessageBox(_("To apply a filter, all selected tracks must have the same sample rate."));
return false;
}
}
selcount++;
}
t = (WaveTrack *) iter.Next();
}
return true;
}
// Deduce m_FromFrequency from the samples at the beginning of
// the selection. Then set some other params accordingly.
void EffectChangePitch::DeduceFrequencies()
{
// As a neat trick, attempt to get the frequency of the note at the
// beginning of the selection.
SelectedTrackListOfKindIterator iter(Track::Wave, inputTracks());
WaveTrack *track = (WaveTrack *) iter.First();
if (track) {
double rate = track->GetRate();
// Auto-size window -- high sample rates require larger windowSize.
// Aim for around 2048 samples at 44.1 kHz (good down to about 100 Hz).
// To detect single notes, analysis period should be about 0.2 seconds.
// windowSize must be a power of 2.
const size_t windowSize =
// windowSize < 256 too inaccurate
std::max(256, wxRound(pow(2.0, floor((log(rate / 20.0)/log(2.0)) + 0.5))));
// we want about 0.2 seconds to catch the first note.
// number of windows rounded to nearest integer >= 1.
const unsigned numWindows =
std::max(1, wxRound((double)(rate / (5.0f * windowSize))));
double trackStart = track->GetStartTime();
double t0 = mT0 < trackStart? trackStart: mT0;
auto start = track->TimeToLongSamples(t0);
auto analyzeSize = windowSize * numWindows;
Floats buffer{ analyzeSize };
Floats freq{ windowSize / 2 };
Floats freqa{ windowSize / 2, true };
track->Get((samplePtr) buffer.get(), floatSample, start, analyzeSize);
for(unsigned i = 0; i < numWindows; i++) {
ComputeSpectrum(buffer.get() + i * windowSize, windowSize,
windowSize, rate, freq.get(), true);
for(size_t j = 0; j < windowSize / 2; j++)
freqa[j] += freq[j];
}
size_t argmax = 0;
for(size_t j = 1; j < windowSize / 2; j++)
if (freqa[j] > freqa[argmax])
argmax = j;
auto lag = (windowSize / 2 - 1) - argmax;
m_dStartFrequency = rate / lag;
}
double dFromMIDInote = FreqToMIDInote(m_dStartFrequency);
double dToMIDInote = dFromMIDInote + m_dSemitonesChange;
m_nFromPitch = PitchIndex(dFromMIDInote);
m_nFromOctave = PitchOctave(dFromMIDInote);
m_nToPitch = PitchIndex(dToMIDInote);
m_nToOctave = PitchOctave(dToMIDInote);
m_FromFrequency = m_dStartFrequency;
Calc_PercentChange();
Calc_ToFrequency();
}
bool EffectAutoDuck::Init()
{
mControlTrack = NULL;
TrackListIterator iter(inputTracks());
Track *t = iter.First();
bool lastWasSelectedWaveTrack = false;
const WaveTrack *controlTrackCandidate = NULL;
while(t)
{
if (lastWasSelectedWaveTrack && !t->GetSelected() &&
t->GetKind() == Track::Wave)
{
// This could be the control track, so remember it
controlTrackCandidate = (WaveTrack*)t;
}
lastWasSelectedWaveTrack = false;
if (t->GetSelected())
{
if (t->GetKind() == Track::Wave)
{
lastWasSelectedWaveTrack = true;
}
else
{
Effect::MessageBox(
_("You selected a track which does not contain audio. AutoDuck can only process audio tracks."),
/* i18n-hint: Auto duck is the name of an effect that 'ducks' (reduces the volume)
* of the audio automatically when there is sound on another track. Not as
* in 'Donald-Duck'!*/
wxICON_ERROR);
return false;
}
}
t = iter.Next();
}
if (!controlTrackCandidate)
{
Effect::MessageBox(
_("Auto Duck needs a control track which must be placed below the selected track(s)."),
wxICON_ERROR);
return false;
}
mControlTrack = controlTrackCandidate;
return true;
}
bool EffectTruncSilence::ProcessAll()
{
// Copy tracks
CopyInputTracks(Track::All);
// Master list of silent regions.
// This list should always be kept in order.
RegionList silences;
SelectedTrackListOfKindIterator iter(Track::Wave, inputTracks());
if (FindSilences(silences, inputTracks(), iter.First(), iter.Last())) {
TrackListIterator iterOut(mOutputTracks.get());
double totalCutLen = 0.0;
Track *const first = iterOut.First();
if (DoRemoval(silences, 0, 1, first, iterOut.Last(), totalCutLen)) {
mT1 -= totalCutLen;
return true;
}
}
return false;
}
bool VampEffect::Init()
{
mRate = 0.0;
// PRL: this loop checked that channels of a track have the same rate,
// but there was no check that all tracks have one rate, and only the first
// is remembered in mRate. Is that correct?
for (auto leader : inputTracks()->Leaders<const WaveTrack>()) {
auto channelGroup = TrackList::Channels( leader );
auto rate = (*channelGroup.first++) -> GetRate();
for(auto channel : channelGroup) {
if (rate != channel->GetRate())
// PRL: Track rate might not match individual clip rates.
// So is this check not adequate?
{
// TODO: more-than-two-channels-message
Effect::MessageBox(_("Sorry, Vamp Plug-ins cannot be run on stereo tracks where the individual channels of the track do not match."));
return false;
}
}
if (mRate == 0.0)
mRate = rate;
}
if (mRate <= 0.0)
{
mRate = mProjectRate;
}
// The plugin must be reloaded to allow changing parameters
Vamp::HostExt::PluginLoader *loader = Vamp::HostExt::PluginLoader::getInstance();
mPlugin.reset(loader->loadPlugin(mKey, mRate, Vamp::HostExt::PluginLoader::ADAPT_ALL));
if (!mPlugin)
{
Effect::MessageBox(_("Sorry, failed to load Vamp Plug-in."));
return false;
}
return true;
}
bool EffectAmplify::Init()
{
mPeak = 0.0;
SelectedTrackListOfKindIterator iter(Track::Wave, inputTracks());
for (Track *t = iter.First(); t; t = iter.Next())
{
auto pair = ((WaveTrack *)t)->GetMinMax(mT0, mT1); // may throw
const float min = pair.first, max = pair.second;
float newpeak = (fabs(min) > fabs(max) ? fabs(min) : fabs(max));
if (newpeak > mPeak)
{
mPeak = newpeak;
}
}
return true;
}
bool EffectTruncSilence::ProcessIndependently()
{
unsigned nGroups = 0;
const bool syncLock = ::GetActiveProject()->IsSyncLocked();
// Check if it's permissible
{
SelectedTrackListOfKindIterator iter(Track::Wave, inputTracks());
for (Track *track = iter.First(); track;
track = iter.Next(true) // skip linked tracks
) {
if (syncLock) {
Track *const link = track->GetLink();
SyncLockedTracksIterator syncIter(inputTracks());
for (Track *track2 = syncIter.StartWith(track); track2; track2 = syncIter.Next()) {
if (track2->GetKind() == Track::Wave &&
!(track2 == track || track2 == link) &&
track2->GetSelected()) {
::wxMessageBox(_("When truncating independently, there may only be one selected audio track in each Sync-Locked Track Group."));
return false;
}
}
}
++nGroups;
}
}
if (nGroups == 0)
// nothing to do
return true;
// Now do the work
// Copy tracks
CopyInputTracks(Track::All);
double newT1 = 0.0;
{
unsigned iGroup = 0;
SelectedTrackListOfKindIterator iter(Track::Wave, mOutputTracks.get());
for (Track *track = iter.First(); track;
++iGroup, track = iter.Next(true) // skip linked tracks
) {
Track *const link = track->GetLink();
Track *const last = link ? link : track;
RegionList silences;
if (!FindSilences(silences, mOutputTracks.get(), track, last))
return false;
// Treat tracks in the sync lock group only
Track *groupFirst, *groupLast;
if (syncLock) {
SyncLockedTracksIterator syncIter(mOutputTracks.get());
groupFirst = syncIter.StartWith(track);
groupLast = syncIter.Last();
}
else {
groupFirst = track;
groupLast = last;
}
double totalCutLen = 0.0;
if (!DoRemoval(silences, iGroup, nGroups, groupFirst, groupLast, totalCutLen))
return false;
newT1 = std::max(newT1, mT1 - totalCutLen);
}
}
mT1 = newT1;
return true;
}
bool VampEffect::Process()
{
if (!mPlugin)
{
return false;
}
int count = 0;
bool multiple = false;
unsigned prevTrackChannels = 0;
if (GetNumWaveGroups() > 1)
{
// if there is another track beyond this one and any linked one,
// then we're processing more than one track. That means we
// should use the originating track name in each NEW label
// track's name, to make clear which is which
multiple = true;
}
std::vector<std::shared_ptr<Effect::AddedAnalysisTrack>> addedTracks;
for (auto leader : inputTracks()->Leaders<const WaveTrack>())
{
auto channelGroup = TrackList::Channels(leader);
auto left = *channelGroup.first++;
sampleCount lstart, rstart = 0;
sampleCount len;
GetSamples(left, &lstart, &len);
unsigned channels = 1;
// channelGroup now contains all but the first channel
const WaveTrack *right =
channelGroup.size() ? *channelGroup.first++ : nullptr;
if (right)
{
channels = 2;
GetSamples(right, &rstart, &len);
}
// TODO: more-than-two-channels
size_t step = mPlugin->getPreferredStepSize();
size_t block = mPlugin->getPreferredBlockSize();
bool initialiseRequired = true;
if (block == 0)
{
if (step != 0)
{
block = step;
}
else
{
block = 1024;
}
}
if (step == 0)
{
step = block;
}
if (prevTrackChannels > 0)
{
// Plugin has already been initialised, so if the number of
// channels remains the same, we only need to do a reset.
// Otherwise we need to re-construct the whole plugin,
// because a Vamp plugin can't be re-initialised.
if (prevTrackChannels == channels)
{
mPlugin->reset();
initialiseRequired = false;
}
else
{
//!!! todo: retain parameters previously set
Init();
}
}
if (initialiseRequired)
{
if (!mPlugin->initialise(channels, step, block))
{
Effect::MessageBox(_("Sorry, Vamp Plug-in failed to initialize."));
return false;
}
}
const auto effectName = GetSymbol().Translation();
addedTracks.push_back(AddAnalysisTrack(
multiple
? wxString::Format( _("%s: %s"), left->GetName(), effectName )
: effectName
));
LabelTrack *ltrack = addedTracks.back()->get();
FloatBuffers data{ channels, block };
auto originalLen = len;
auto ls = lstart;
auto rs = rstart;
while (len != 0)
{
const auto request = limitSampleBufferSize( block, len );
if (left)
{
left->Get((samplePtr)data[0].get(), floatSample, ls, request);
}
if (right)
{
right->Get((samplePtr)data[1].get(), floatSample, rs, request);
}
if (request < block)
{
for (unsigned int c = 0; c < channels; ++c)
{
for (decltype(block) i = request; i < block; ++i)
{
data[c][i] = 0.f;
}
}
}
// UNSAFE_SAMPLE_COUNT_TRUNCATION
// Truncation in case of very long tracks!
Vamp::RealTime timestamp = Vamp::RealTime::frame2RealTime(
long( ls.as_long_long() ),
(int)(mRate + 0.5)
);
Vamp::Plugin::FeatureSet features = mPlugin->process(
reinterpret_cast< float** >( data.get() ), timestamp);
AddFeatures(ltrack, features);
if (len > (int)step)
{
len -= step;
}
else
{
len = 0;
}
ls += step;
rs += step;
if (channels > 1)
{
if (TrackGroupProgress(count,
(ls - lstart).as_double() /
originalLen.as_double() ))
{
return false;
}
}
else
{
if (TrackProgress(count,
(ls - lstart).as_double() /
originalLen.as_double() ))
{
return false;
}
}
}
Vamp::Plugin::FeatureSet features = mPlugin->getRemainingFeatures();
AddFeatures(ltrack, features);
prevTrackChannels = channels;
}
// All completed without cancellation, so commit the addition of tracks now
for (auto &addedTrack : addedTracks)
addedTrack->Commit();
return true;
}
