2010-01-23 19:44:49 +00:00
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/**********************************************************************
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Audacity: A Digital Audio Editor
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FindClipping.cpp
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Leland Lucius
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*******************************************************************//**
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\class EffectFindClipping
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\brief Locates clipping and inserts labels when found
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*//****************************************************************//**
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\class FindClippingDialog
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\brief FindClippingDialog used with EffectFindClipping
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*//*******************************************************************/
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#include "../Audacity.h"
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#include "../AudacityApp.h"
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#include <wx/defs.h>
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#include <wx/button.h>
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#include <wx/sizer.h>
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#include <wx/stattext.h>
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#include <wx/textctrl.h>
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#include <wx/validate.h>
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#include <wx/valtext.h>
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#include <wx/generic/textdlgg.h>
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#include <wx/intl.h>
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#include <math.h>
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#include "FindClipping.h"
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#include "../LabelTrack.h"
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#include "../WaveTrack.h"
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EffectFindClipping::EffectFindClipping()
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{
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SetEffectFlags(BUILTIN_EFFECT | ANALYZE_EFFECT);
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mStart = 3;
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mStop = 3;
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}
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wxString EffectFindClipping::GetEffectDescription()
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{
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return wxString::Format(_("Detect clipping"));
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2014-06-03 20:30:19 +00:00
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}
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2010-01-23 19:44:49 +00:00
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bool EffectFindClipping::PromptUser()
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{
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FindClippingDialog dlg(this, mParent);
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dlg.CentreOnParent();
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if (dlg.ShowModal() == wxID_CANCEL) {
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return false;
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}
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return true;
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}
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bool EffectFindClipping::TransferParameters(Shuttle & shuttle)
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2014-06-03 20:30:19 +00:00
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{
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2010-01-23 19:44:49 +00:00
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shuttle.TransferInt(wxT("Start"), mStart, 3);
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shuttle.TransferInt(wxT("Stop"), mStop, 3);
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return true;
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}
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bool EffectFindClipping::Process()
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{
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LabelTrack *l = NULL;
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Track *original = NULL;
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TrackListOfKindIterator iter(Track::Label, mTracks);
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for (Track *t = iter.First(); t; t = iter.Next()) {
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if (t->GetName() == wxT("Clipping")) {
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l = (LabelTrack *) t;
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// copy LabelTrack here, so it can be undone on cancel
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l->Copy(l->GetStartTime(), l->GetEndTime(), &original);
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original->SetOffset(l->GetStartTime());
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original->SetName(wxT("Clipping"));
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break;
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}
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}
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2014-06-03 20:30:19 +00:00
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2010-01-23 19:44:49 +00:00
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if (!l) {
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l = mFactory->NewLabelTrack();
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l->SetName(_("Clipping"));
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mTracks->Add((Track *) l);
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}
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int count = 0;
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// JC: Only process selected tracks.
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SelectedTrackListOfKindIterator waves(Track::Wave, mTracks);
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WaveTrack *t = (WaveTrack *) waves.First();
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while (t) {
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double trackStart = t->GetStartTime();
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double trackEnd = t->GetEndTime();
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double t0 = mT0 < trackStart ? trackStart : mT0;
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double t1 = mT1 > trackEnd ? trackEnd : mT1;
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if (t1 > t0) {
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sampleCount start = t->TimeToLongSamples(t0);
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sampleCount end = t->TimeToLongSamples(t1);
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sampleCount len = (sampleCount)(end - start);
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if (!ProcessOne(l, count, t, start, len)) {
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//put it back how it was
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mTracks->Remove((Track *) l);
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if(original) {
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mTracks->Add((Track *) original);
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}
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return false;
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}
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}
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count++;
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t = (WaveTrack *) waves.Next();
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}
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return true;
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}
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bool EffectFindClipping::ProcessOne(LabelTrack * l,
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int count,
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WaveTrack * t,
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sampleCount start,
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sampleCount len)
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{
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bool bGoodResult = true;
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sampleCount s = 0;
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sampleCount blockSize = (sampleCount) (mStart * 1000);
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2014-06-03 20:30:19 +00:00
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2010-01-23 19:44:49 +00:00
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if (len < mStart) {
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return true;
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}
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float *buffer = new float[blockSize];
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float *ptr = buffer;
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sampleCount startrun = 0;
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sampleCount stoprun = 0;
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sampleCount samps = 0;
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sampleCount block = 0;
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double startTime = -1.0;
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2014-06-03 20:30:19 +00:00
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2010-01-23 19:44:49 +00:00
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while (s < len) {
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if (block == 0) {
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if (TrackProgress(count, s / (double) len)) {
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bGoodResult = false;
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break;
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}
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block = s + blockSize > len ? len - s : blockSize;
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t->Get((samplePtr)buffer, floatSample, start + s, block);
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ptr = buffer;
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}
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float v = fabs(*ptr++);
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if (v >= MAX_AUDIO) {
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if (startrun == 0) {
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startTime = t->LongSamplesToTime(start + s);
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samps = 0;
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}
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else {
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stoprun = 0;
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}
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startrun++;
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samps++;
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}
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else {
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if (startrun >= mStart) {
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stoprun++;
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samps++;
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if (stoprun >= mStop) {
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l->AddLabel(startTime,
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t->LongSamplesToTime(start + s - mStop),
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2010-08-31 03:56:47 +00:00
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wxString::Format(wxT("%lld of %lld"), startrun, samps - mStop));
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2010-01-23 19:44:49 +00:00
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startrun = 0;
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stoprun = 0;
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samps = 0;
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}
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}
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else {
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startrun = 0;
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}
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}
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s++;
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block--;
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}
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delete [] buffer;
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return bGoodResult;
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}
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//----------------------------------------------------------------------------
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// FindClippingDialog
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//----------------------------------------------------------------------------
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FindClippingDialog::FindClippingDialog(EffectFindClipping * effect, wxWindow * parent)
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: EffectDialog(parent, _("Find Clipping"), INSERT_EFFECT)
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{
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mEffect = effect;
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Init();
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}
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void FindClippingDialog::PopulateOrExchange(ShuttleGui & S)
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{
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S.StartMultiColumn(2, wxALIGN_CENTER);
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{
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S.TieTextBox(_("Start threshold (samples):"),
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mEffect->mStart,
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10)->SetValidator(wxTextValidator(wxFILTER_NUMERIC));
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S.TieTextBox(_("Stop threshold (samples):"),
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mEffect->mStop,
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10)->SetValidator(wxTextValidator(wxFILTER_NUMERIC));
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}
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S.EndMultiColumn();
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}
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bool FindClippingDialog::TransferDataFromWindow()
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{
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EffectDialog::TransferDataFromWindow();
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if (mEffect->mStart <= 0 || mEffect->mStop <= 0) {
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wxMessageBox(_("Start and stop must be greater than 0."));
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return false;
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}
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return true;
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}
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