2018-01-07 01:15:13 +00:00
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/**********************************************************************
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Audacity: A Digital Audio Editor
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Contrast.cpp
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\class ContrastDialog
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\brief Dialog used for Contrast menu item
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*//*******************************************************************/
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#include "../Audacity.h"
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#include "Contrast.h"
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#include "../WaveTrack.h"
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#include "../Prefs.h"
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#include "../Project.h"
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#include "../ShuttleGui.h"
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#include "../FileNames.h"
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#include "../widgets/LinkingHtmlWindow.h"
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#include "../widgets/HelpSystem.h"
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#include "../widgets/NumericTextCtrl.h"
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#include "../widgets/ErrorDialog.h"
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#include <cmath>
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#include <limits>
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#if defined(__WXMSW__) && !defined(__CYGWIN__)
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#include <float.h>
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#define finite(x) _finite(x)
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#endif
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#include <wx/filedlg.h>
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#include <wx/valtext.h>
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#include <wx/log.h>
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#include "../PlatformCompatibility.h"
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#define DB_MAX_LIMIT 0.0 // Audio is massively distorted.
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#define WCAG2_PASS 20.0 // dB difference required to pass WCAG2 test.
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bool ContrastDialog::GetDB(float &dB)
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{
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float rms = float(0.0);
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int numberSelecteTracks = 0;
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// For stereo tracks: sqrt((mean(L)+mean(R))/2)
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bool isStereo = false;
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double meanSq = 0.0;
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AudacityProject *p = GetActiveProject();
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SelectedTrackListOfKindIterator iter(Track::Wave, p->GetTracks());
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WaveTrack *t = (WaveTrack *) iter.First();
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while (t) {
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numberSelecteTracks++;
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if (numberSelecteTracks > 1 && !isStereo) {
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AudacityMessageDialog m(NULL, _("You can only measure one track at a time."), _("Error"), wxOK);
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m.ShowModal();
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return false;
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}
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isStereo = t->GetLinked();
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wxASSERT(mT0 <= mT1);
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// Ignore whitespace beyond ends of track.
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if(mT0 < t->GetStartTime())
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mT0 = t->GetStartTime();
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if(mT1 > t->GetEndTime())
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mT1 = t->GetEndTime();
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auto SelT0 = t->TimeToLongSamples(mT0);
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auto SelT1 = t->TimeToLongSamples(mT1);
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if(SelT0 > SelT1)
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{
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AudacityMessageDialog m(NULL, _("Invalid audio selection.\nPlease ensure that audio is selected."), _("Error"), wxOK);
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m.ShowModal();
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return false;
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}
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if(SelT0 == SelT1)
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{
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AudacityMessageDialog m(NULL, _("Nothing to measure.\nPlease select a section of a track."), _("Error"), wxOK);
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m.ShowModal();
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return false;
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}
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// Don't throw in this analysis dialog
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rms = ((WaveTrack *)t)->GetRMS(mT0, mT1, false);
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meanSq += rms * rms;
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t = (WaveTrack *) iter.Next();
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}
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// TODO: This works for stereo, provided the audio clips are in both channels.
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// We should really count gaps between clips as silence.
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rms = (meanSq > 0.0)? sqrt(meanSq/(double)numberSelecteTracks) : 0.0;
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if(numberSelecteTracks == 0) {
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AudacityMessageDialog m(NULL, _("Please select an audio track."), _("Error"), wxOK);
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m.ShowModal();
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return false;
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}
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// Gives warning C4056, Overflow in floating-point constant arithmetic
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// -INFINITY is intentional here.
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// Looks like we are stuck with this warning, as
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// #pragma warning( disable : 4056)
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// even around the whole function does not disable it successfully.
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dB = (rms == 0.0)? -INFINITY : LINEAR_TO_DB(rms);
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return true;
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}
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void ContrastDialog::SetStartAndEndTime()
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{
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AudacityProject *p = GetActiveProject();
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mT0 = p->mViewInfo.selectedRegion.t0();
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mT1 = p->mViewInfo.selectedRegion.t1();
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}
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// WDR: class implementations
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//----------------------------------------------------------------------------
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// ContrastDialog
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//----------------------------------------------------------------------------
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// WDR: event table for ContrastDialog
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enum {
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ID_BUTTON_USECURRENTF = 10001,
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ID_BUTTON_USECURRENTB,
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//ID_BUTTON_GETURL,
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ID_BUTTON_EXPORT,
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ID_BUTTON_RESET,
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//ID_BUTTON_CLOSE,
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ID_FOREGROUNDSTART_T,
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ID_FOREGROUNDEND_T,
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ID_BACKGROUNDSTART_T,
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ID_BACKGROUNDEND_T,
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ID_FOREGROUNDDB_TEXT,
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ID_BACKGROUNDDB_TEXT,
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ID_RESULTS_TEXT,
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ID_RESULTSDB_TEXT
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};
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BEGIN_EVENT_TABLE(ContrastDialog,wxDialogWrapper)
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EVT_BUTTON(ID_BUTTON_USECURRENTF, ContrastDialog::OnGetForeground)
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EVT_BUTTON(ID_BUTTON_USECURRENTB, ContrastDialog::OnGetBackground)
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EVT_BUTTON(wxID_HELP, ContrastDialog::OnGetURL)
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EVT_BUTTON(ID_BUTTON_EXPORT, ContrastDialog::OnExport)
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EVT_BUTTON(ID_BUTTON_RESET, ContrastDialog::OnReset)
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EVT_BUTTON(wxID_CANCEL, ContrastDialog::OnClose)
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END_EVENT_TABLE()
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/* i18n-hint: WCAG2 is the 'Web Content Accessibility Guidelines (WCAG) 2.0', see http://www.w3.org/TR/WCAG20/ */
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ContrastDialog::ContrastDialog(wxWindow * parent, wxWindowID id,
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const wxString & title,
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const wxPoint & pos):
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wxDialogWrapper(parent, id, title, pos, wxDefaultSize,
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wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER | wxMAXIMIZE_BOX )
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{
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SetName(GetTitle());
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mT0 = 0.0;
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mT1 = 0.0;
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foregrounddB = 0.0;
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backgrounddB = 0.0;
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mForegroundIsDefined = false;
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mBackgroundIsDefined = false;
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// NULL out the control members until the controls are created.
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mForegroundStartT = NULL;
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mForegroundEndT = NULL;
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mBackgroundStartT = NULL;
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mBackgroundEndT = NULL;
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wxTextValidator vld(wxFILTER_NUMERIC);
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wxString number;
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AudacityProject *p = GetActiveProject();
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mProjectRate = p->GetRate();
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ShuttleGui S(this, eIsCreating);
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S.SetBorder(5);
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S.StartHorizontalLay(wxCENTER, false);
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{
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/* i18n-hint: RMS abbreviates root mean square, a certain averaging method */
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S.AddTitle(_("Contrast Analyzer, for measuring RMS volume differences between two selections of audio."));
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}
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S.EndHorizontalLay();
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S.StartStatic( _("Parameters") );
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{
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S.StartMultiColumn(5, wxEXPAND);
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{
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// Headings
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S.AddFixedText( {} ); // spacer
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S.AddFixedText(_("Start"));
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S.AddFixedText(_("End"));
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S.AddFixedText( {} ); // spacer
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S.AddFixedText(_("Volume "));
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2017-10-27 23:14:48 +00:00
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const auto options = NumericTextCtrl::Options{}
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.AutoPos(true)
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.MenuEnabled(false)
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.ReadOnly(true);
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2018-01-07 01:15:13 +00:00
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//Foreground
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S.AddFixedText(_("&Foreground:"), false);
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if (S.GetMode() == eIsCreating)
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{
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mForegroundStartT = safenew
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2017-10-27 23:14:48 +00:00
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NumericTextCtrl(this, ID_FOREGROUNDSTART_T,
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NumericConverter::TIME,
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2018-01-07 01:15:13 +00:00
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_("hh:mm:ss + hundredths"),
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0.0,
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mProjectRate,
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2017-10-27 23:14:48 +00:00
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options);
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2018-01-07 01:15:13 +00:00
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mForegroundStartT->SetName(_("Foreground start time"));
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}
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S.AddWindow(mForegroundStartT);
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if (S.GetMode() == eIsCreating)
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{
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mForegroundEndT = safenew
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2017-10-27 23:14:48 +00:00
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NumericTextCtrl(this, ID_FOREGROUNDEND_T,
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NumericConverter::TIME,
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2018-01-07 01:15:13 +00:00
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_("hh:mm:ss + hundredths"),
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0.0,
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mProjectRate,
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2017-10-27 23:14:48 +00:00
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options);
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2018-01-07 01:15:13 +00:00
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mForegroundEndT->SetName(_("Foreground end time"));
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}
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S.AddWindow(mForegroundEndT);
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m_pButton_UseCurrentF = S.Id(ID_BUTTON_USECURRENTF).AddButton(_("&Measure selection"));
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mForegroundRMSText=S.Id(ID_FOREGROUNDDB_TEXT).AddTextBox( {}, wxT(""), 17);
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mForegroundRMSText->Connect(wxEVT_KEY_DOWN, wxKeyEventHandler(ContrastDialog::OnChar));
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//Background
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S.AddFixedText(_("&Background:"));
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if (S.GetMode() == eIsCreating)
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{
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mBackgroundStartT = safenew
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2017-10-27 23:14:48 +00:00
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NumericTextCtrl(this, ID_BACKGROUNDSTART_T,
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NumericConverter::TIME,
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2018-01-07 01:15:13 +00:00
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_("hh:mm:ss + hundredths"),
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0.0,
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mProjectRate,
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2017-10-27 23:14:48 +00:00
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options);
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2018-01-07 01:15:13 +00:00
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mBackgroundStartT->SetName(_("Background start time"));
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}
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S.AddWindow(mBackgroundStartT);
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if (S.GetMode() == eIsCreating)
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{
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mBackgroundEndT = safenew
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2017-10-27 23:14:48 +00:00
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NumericTextCtrl(this, ID_BACKGROUNDEND_T,
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NumericConverter::TIME,
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2018-01-07 01:15:13 +00:00
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_("hh:mm:ss + hundredths"),
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0.0,
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mProjectRate,
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2017-10-27 23:14:48 +00:00
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options);
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2018-01-07 01:15:13 +00:00
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mBackgroundEndT->SetName(_("Background end time"));
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}
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S.AddWindow(mBackgroundEndT);
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m_pButton_UseCurrentB = S.Id(ID_BUTTON_USECURRENTB).AddButton(_("Mea&sure selection"));
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mBackgroundRMSText = S.Id(ID_BACKGROUNDDB_TEXT).AddTextBox( {}, wxT(""), 17);
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mBackgroundRMSText->Connect(wxEVT_KEY_DOWN, wxKeyEventHandler(ContrastDialog::OnChar));
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}
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S.EndMultiColumn();
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}
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S.EndStatic();
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//Result
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S.StartStatic( _("Result") );
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{
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S.StartMultiColumn(3, wxCENTER);
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{
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S.AddFixedText(_("Co&ntrast Result:"));
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mPassFailText = S.Id(ID_RESULTS_TEXT).AddTextBox( {}, wxT(""), 50);
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mPassFailText->Connect(wxEVT_KEY_DOWN, wxKeyEventHandler(ContrastDialog::OnChar));
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m_pButton_Reset = S.Id(ID_BUTTON_RESET).AddButton(_("R&eset"));
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S.AddFixedText(_("&Difference:"));
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mDiffText = S.Id(ID_RESULTSDB_TEXT).AddTextBox( {}, wxT(""), 50);
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mDiffText->Connect(wxEVT_KEY_DOWN, wxKeyEventHandler(ContrastDialog::OnChar));
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m_pButton_Export = S.Id(ID_BUTTON_EXPORT).AddButton(_("E&xport..."));
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}
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S.EndMultiColumn();
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}
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S.EndStatic();
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S.AddStandardButtons(eCloseButton |eHelpButton);
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#if 0
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S.StartMultiColumn(3, wxEXPAND);
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{
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S.SetStretchyCol(1);
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m_pButton_GetURL = S.Id(ID_BUTTON_GETURL).AddButton(_("&Help"));
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S.AddFixedText(wxT(" ")); // spacer
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m_pButton_Close = S.Id(ID_BUTTON_CLOSE).AddButton(_("&Close"));
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}
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S.EndMultiColumn();
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#endif
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Layout();
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Fit();
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SetMinSize(GetSize());
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Center();
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}
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void ContrastDialog::OnGetURL(wxCommandEvent & WXUNUSED(event))
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{
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// Original help page is back on-line (March 2016), but the manual should be more reliable.
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// http://www.eramp.com/WCAG_2_audio_contrast_tool_help.htm
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HelpSystem::ShowHelp(this, wxT("Contrast"));
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}
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void ContrastDialog::OnClose(wxCommandEvent & WXUNUSED(event))
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{
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wxCommandEvent dummyEvent;
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OnReset(dummyEvent);
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Show(false);
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}
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void ContrastDialog::OnGetForeground(wxCommandEvent & /*event*/)
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{
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AudacityProject *p = GetActiveProject();
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SelectedTrackListOfKindIterator iter(Track::Wave, p->GetTracks());
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for (Track *t = iter.First(); t; t = iter.Next()) {
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mForegroundStartT->SetValue(p->mViewInfo.selectedRegion.t0());
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mForegroundEndT->SetValue(p->mViewInfo.selectedRegion.t1());
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}
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SetStartAndEndTime();
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mForegroundIsDefined = GetDB(foregrounddB);
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m_pButton_UseCurrentF->SetFocus();
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results();
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}
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void ContrastDialog::OnGetBackground(wxCommandEvent & /*event*/)
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{
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AudacityProject *p = GetActiveProject();
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SelectedTrackListOfKindIterator iter(Track::Wave, p->GetTracks());
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for (Track *t = iter.First(); t; t = iter.Next()) {
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mBackgroundStartT->SetValue(p->mViewInfo.selectedRegion.t0());
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mBackgroundEndT->SetValue(p->mViewInfo.selectedRegion.t1());
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}
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SetStartAndEndTime();
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mBackgroundIsDefined = GetDB(backgrounddB);
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m_pButton_UseCurrentB->SetFocus();
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results();
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}
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namespace {
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// PRL: I gathered formatting into these functions, and eliminated some
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// repetitions, and removed the redundant word "Average" as applied to RMS.
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// Should these variations in formats be collapsed further?
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// Pass nullptr when value is not yet defined
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wxString FormatRMSMessage( float *pValue )
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{
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/* i18n-hint: RMS abbreviates root mean square, a certain averaging method */
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wxString format0{ _("RMS = %s.") };
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/* i18n-hint: dB abbreviates decibels */
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wxString format1{ _("%s dB") };
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wxString value;
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if ( pValue )
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if( fabs( *pValue ) != std::numeric_limits<float>::infinity() ) {
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auto number = wxString::Format( _("%.2f"), *pValue );
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value = wxString::Format( format1, number );
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}
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else
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value = _("zero");
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else
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value = wxString::Format( format1, "" );
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return wxString::Format( format0, value );
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}
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wxString FormatDifference( float diffdB )
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{
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if( diffdB != diffdB ) // test for NaN, reliant on IEEE implementation
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return _("indeterminate");
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else {
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if( diffdB != std::numeric_limits<float>::infinity() )
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/* i18n-hint: dB abbreviates decibels */
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/* i18n-hint: RMS abbreviates root mean square, a certain averaging method */
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return wxString::Format(_("%.2f dB RMS"), diffdB);
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else
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/* i18n-hint: dB abbreviates decibels */
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return _("Infinite dB difference");
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}
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}
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wxString FormatDifferenceForExport( float diffdB )
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{
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if( diffdB != diffdB ) //test for NaN, reliant on IEEE implementation
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return _("Difference is indeterminate.");
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else
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if( fabs(diffdB) != std::numeric_limits<float>::infinity() )
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/* i18n-hint: dB abbreviates decibels */
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/* i18n-hint: RMS abbreviates root mean square, a certain averaging method */
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return wxString::Format(_("Difference = %.2f RMS dB."), diffdB );
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else
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/* i18n-hint: dB abbreviates decibels */
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/* i18n-hint: RMS abbreviates root mean square, a certain averaging method */
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return _("Difference = infinite RMS dB.");
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}
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}
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void ContrastDialog::results()
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{
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mPassFailText->SetName(wxT(""));
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mPassFailText->ChangeValue(wxT(""));
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mDiffText->ChangeValue(wxT(""));
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// foreground and background defined.
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if(mForegroundIsDefined && mBackgroundIsDefined) {
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float diffdB = std::fabs(foregrounddB - backgrounddB);
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if(foregrounddB > DB_MAX_LIMIT) {
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mPassFailText->ChangeValue(_("Foreground level too high"));
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}
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else if (backgrounddB > DB_MAX_LIMIT) {
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mPassFailText->ChangeValue(_("Background level too high"));
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}
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else if (backgrounddB > foregrounddB) {
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mPassFailText->ChangeValue(_("Background higher than foreground"));
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}
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else if(diffdB > WCAG2_PASS) {
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/* i18n-hint: WCAG abbreviates Web Content Accessibility Guidelines */
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mPassFailText->ChangeValue(_("WCAG2 Pass"));
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}
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else {
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/* i18n-hint: WCAG abbreviates Web Content Accessibility Guidelines */
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mPassFailText->ChangeValue(_("WCAG2 Fail"));
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}
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/* i18n-hint: i.e. difference in loudness at the moment. */
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mDiffText->SetName(_("Current difference"));
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mDiffText->ChangeValue( FormatDifference( diffdB ) );
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}
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if (mForegroundIsDefined) {
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mForegroundRMSText->SetName(_("Measured foreground level")); // Read by screen-readers
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if(std::isinf(- foregrounddB))
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mForegroundRMSText->ChangeValue(_("zero"));
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else
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mForegroundRMSText->ChangeValue(wxString::Format(_("%.2f dB"), foregrounddB)); // i18n-hint: short form of 'decibels'
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}
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else {
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mForegroundRMSText->SetName(_("No foreground measured")); // Read by screen-readers
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mForegroundRMSText->ChangeValue(wxT(""));
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mPassFailText->ChangeValue(_("Foreground not yet measured"));
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}
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if (mBackgroundIsDefined) {
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mBackgroundRMSText->SetName(_("Measured background level"));
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if(std::isinf(- backgrounddB))
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mBackgroundRMSText->ChangeValue(_("zero"));
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else
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mBackgroundRMSText->ChangeValue(wxString::Format(_("%.2f dB"), backgrounddB));
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}
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else {
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mBackgroundRMSText->SetName(_("No background measured"));
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mBackgroundRMSText->ChangeValue(wxT(""));
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mPassFailText->ChangeValue(_("Background not yet measured"));
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}
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}
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void ContrastDialog::OnExport(wxCommandEvent & WXUNUSED(event))
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{
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// TODO: Handle silence checks better (-infinity dB)
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AudacityProject * project = GetActiveProject();
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wxString fName = wxT("contrast.txt");
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fName = FileNames::SelectFile(FileNames::Operation::Export,
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_("Export Contrast Result As:"),
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wxEmptyString,
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fName,
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wxT("txt"),
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wxT("*.txt"),
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wxFD_SAVE | wxRESIZE_BORDER,
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this);
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if (fName == wxT(""))
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return;
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wxTextFile f(fName);
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#ifdef __WXMAC__
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wxFile{}.Create(fName);
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#else
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f.Create();
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#endif
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f.Open();
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if (!f.IsOpened()) {
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AudacityMessageBox(
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wxString::Format( _("Couldn't write to file: %s"), fName) );
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return;
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}
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f.AddLine(wxT("==================================="));
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/* i18n-hint: WCAG abbreviates Web Content Accessibility Guidelines */
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f.AddLine(_("WCAG 2.0 Success Criteria 1.4.7 Contrast Results"));
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f.AddLine(wxT(""));
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f.AddLine(wxString::Format(_("Filename = %s."), project->GetFileName() ));
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f.AddLine(wxT(""));
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f.AddLine(_("Foreground"));
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float t = (float)mForegroundStartT->GetValue();
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int h = (int)(t/3600); // there must be a standard function for this!
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int m = (int)((t - h*3600)/60);
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float s = t - h*3600.0 - m*60.0;
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f.AddLine(wxString::Format(_("Time started = %2d hour(s), %2d minute(s), %.2f seconds."), h, m, s ));
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t = (float)mForegroundEndT->GetValue();
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h = (int)(t/3600);
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m = (int)((t - h*3600)/60);
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s = t - h*3600.0 - m*60.0;
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f.AddLine(wxString::Format(_("Time ended = %2d hour(s), %2d minute(s), %.2f seconds."), h, m, s ));
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f.AddLine( FormatRMSMessage( mForegroundIsDefined ? &foregrounddB : nullptr ) );
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f.AddLine(wxT(""));
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f.AddLine(_("Background"));
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t = (float)mBackgroundStartT->GetValue();
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h = (int)(t/3600);
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m = (int)((t - h*3600)/60);
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s = t - h*3600.0 - m*60.0;
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f.AddLine(wxString::Format(_("Time started = %2d hour(s), %2d minute(s), %.2f seconds."), h, m, s ));
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t = (float)mBackgroundEndT->GetValue();
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h = (int)(t/3600);
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m = (int)((t - h*3600)/60);
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s = t - h*3600.0 - m*60.0;
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f.AddLine(wxString::Format(_("Time ended = %2d hour(s), %2d minute(s), %.2f seconds."), h, m, s ));
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f.AddLine( FormatRMSMessage( mBackgroundIsDefined ? &backgrounddB : nullptr ) );
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f.AddLine(wxT(""));
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f.AddLine(_("Results"));
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float diffdB = foregrounddB - backgrounddB;
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f.AddLine( FormatDifferenceForExport( diffdB ) );
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if( diffdB > 20. )
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f.AddLine(_("Success Criteria 1.4.7 of WCAG 2.0: Pass"));
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else
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f.AddLine(_("Success Criteria 1.4.7 of WCAG 2.0: Fail"));
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f.AddLine(wxT(""));
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f.AddLine(_("Data gathered"));
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wxString sNow;
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wxDateTime now = wxDateTime::Now();
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int year = now.GetYear();
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wxDateTime::Month month = now.GetMonth();
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wxString monthName = now.GetMonthName(month);
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int dom = now.GetDay();
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int hour = now.GetHour();
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int minute = now.GetMinute();
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int second = now.GetSecond();
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sNow = wxString::Format(wxT("%d %s %02d %02dh %02dm %02ds"),
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dom, monthName, year, hour, minute, second);
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f.AddLine(sNow);
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f.AddLine(wxT("==================================="));
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f.AddLine(wxT(""));
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#ifdef __WXMAC__
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f.Write(wxTextFileType_Mac);
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#else
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f.Write();
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#endif
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f.Close();
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}
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void ContrastDialog::OnReset(wxCommandEvent & /*event*/)
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{
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mForegroundStartT->SetValue(0.0);
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mForegroundEndT->SetValue(0.0);
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mBackgroundStartT->SetValue(0.0);
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mBackgroundEndT->SetValue(0.0);
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mForegroundIsDefined = false;
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mBackgroundIsDefined = false;
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mForegroundRMSText->SetName(_("No foreground measured")); // Read by screen-readers
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mBackgroundRMSText->SetName(_("No background measured"));
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mForegroundRMSText->ChangeValue(wxT("")); // Displayed value
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mBackgroundRMSText->ChangeValue(wxT(""));
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mPassFailText->ChangeValue(wxT(""));
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mDiffText->ChangeValue(wxT(""));
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}
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void ContrastDialog::OnChar(wxKeyEvent & event)
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{
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// Is this still required?
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if (event.GetKeyCode() == WXK_TAB) {
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event.Skip();
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return;
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}
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event.Skip(false);
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return;
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}
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