C++ TrackList::GetEndTime方法代码示例

double BatchCommands::GetEndTime()
{
   AudacityProject *project = GetActiveProject();
   if( project == NULL )
   {
      //wxMessageBox( wxT("No project to process!") );
      return -1.0;
   }
   TrackList * tracks = project->GetTracks();
   if( tracks == NULL )
   {
      //wxMessageBox( wxT("No tracks to process!") );
      return -1.0;
   }

   double endTime = tracks->GetEndTime();
   return endTime;
}

void TranscriptionToolBar::OnSelectSound(wxCommandEvent & WXUNUSED(event))
{

   //If IO is busy, abort immediately
   if (gAudioIO->IsBusy()){
      SetButton(false,mButtons[TTB_SelectSound]);
      return;
   }


   mVk->AdjustThreshold(GetSensitivity());
   AudacityProject *p = GetActiveProject();


   TrackList *tl = p->GetTracks();
   TrackListOfKindIterator iter(Track::Wave, tl);

   Track *t = iter.First();   //Make a track
   if(t)
      {
         auto wt = static_cast<const WaveTrack*>(t);
         sampleCount start, len;
         GetSamples(wt, &start, &len);

         //Adjust length to end if selection is null
         //if(len == 0)
         //len = wt->GetSequence()->GetNumSamples()-start;

         double rate =  wt->GetRate();
         auto newstart = mVk->OffBackward(*wt, start, start);
         auto newend   =
            mVk->OffForward(*wt, start + len, (int)(tl->GetEndTime() * rate));

         //reset the selection bounds.
         p->SetSel0(newstart.as_double() / rate);
         p->SetSel1(newend.as_double() /  rate);
         p->RedrawProject();

      }

   SetButton(false,mButtons[TTB_SelectSound]);
}

void TranscriptionToolBar::OnSelectSound(wxCommandEvent & WXUNUSED(event))
{

   //If IO is busy, abort immediately
   if (gAudioIO->IsBusy()){
      SetButton(false,mButtons[TTB_SelectSound]);
      return;
   }


   mVk->AdjustThreshold(GetSensitivity());
   AudacityProject *p = GetActiveProject();


   TrackList *tl = p->GetTracks();
   if(auto wt = *tl->Any<const WaveTrack>().begin()) {
      sampleCount start, len;
      GetSamples(wt, &start, &len);

      //Adjust length to end if selection is null
      //if(len == 0)
      //len = wt->GetSequence()->GetNumSamples()-start;

      double rate =  wt->GetRate();
      auto newstart = mVk->OffBackward(*wt, start, start);
      auto newend   =
      mVk->OffForward(*wt, start + len, (int)(tl->GetEndTime() * rate));

      //reset the selection bounds.
      auto &selectedRegion = p->GetViewInfo().selectedRegion;
      selectedRegion.setTimes(
         newstart.as_double() / rate, newend.as_double() /  rate );
      p->RedrawProject();

   }

   SetButton(false,mButtons[TTB_SelectSound]);
}

void ControlToolBar::PlayPlayRegion(double t0, double t1,
                                    bool looped /* = false */,
                                    bool cutpreview /* = false */,
                                    TimeTrack *timetrack /* = NULL */,
                                    const double *pStartTime /* = NULL */)
{
   SetPlay(true, looped, cutpreview);

   if (gAudioIO->IsBusy()) {
      SetPlay(false);
      return;
   }

   if (cutpreview && t0==t1) {
      SetPlay(false);
      return; /* msmeyer: makes no sense */
   }

   AudacityProject *p = GetActiveProject();
   if (!p) {
      SetPlay(false);
      return;  // Should never happen, but...
   }

   TrackList *t = p->GetTracks();
   if (!t) {
      mPlay->PopUp();
      return;  // Should never happen, but...
   }

   bool hasaudio = false;
   TrackListIterator iter(t);
   for (Track *trk = iter.First(); trk; trk = iter.Next()) {
      if (trk->GetKind() == Track::Wave
#ifdef EXPERIMENTAL_MIDI_OUT
         || trk->GetKind() == Track::Note
#endif
         ) {
         hasaudio = true;
         break;
      }
   }

   if (!hasaudio) {
      SetPlay(false);
      return;  // No need to continue without audio tracks
   }

   double maxofmins,minofmaxs;
#if defined(EXPERIMENTAL_SEEK_BEHIND_CURSOR)
   double init_seek = 0.0;
#endif

   // JS: clarified how the final play region is computed;
   if (t1 == t0) {
      // msmeyer: When playing looped, we play the whole file, if
      // no range is selected. Otherwise, we play from t0 to end
      if (looped) {
         // msmeyer: always play from start
         t0 = t->GetStartTime();
      } else {
         // move t0 to valid range
         if (t0 < 0) {
            t0 = t->GetStartTime();
         }
         else if (t0 > t->GetEndTime()) {
            t0 = t->GetEndTime();
         }
#if defined(EXPERIMENTAL_SEEK_BEHIND_CURSOR)
         else {
            init_seek = t0;         //AC: init_seek is where playback will 'start'
            t0 = t->GetStartTime();
         }
#endif
      }

      // always play to end
      t1 = t->GetEndTime();
   }
   else {
      // always t0 < t1 right?

      // the set intersection between the play region and the
      // valid range maximum of lower bounds
      if (t0 < t->GetStartTime())
         maxofmins = t->GetStartTime();
      else
         maxofmins = t0;

      // minimum of upper bounds
      if (t1 > t->GetEndTime())
         minofmaxs = t->GetEndTime();
      else
         minofmaxs = t1;

      // we test if the intersection has no volume
      if (minofmaxs <= maxofmins) {
         // no volume; play nothing
         return;
      }
//.........这里部分代码省略.........

int ControlToolBar::PlayPlayRegion(const SelectedRegion &selectedRegion,
                                   const AudioIOStartStreamOptions &options,
                                   PlayMode mode,
                                   PlayAppearance appearance, /* = PlayOption::Straight */
                                   bool backwards, /* = false */
                                   bool playWhiteSpace /* = false */)
{
   if (!CanStopAudioStream())
      return -1;

   // Uncomment this for laughs!
   // backwards = true;

   double t0 = selectedRegion.t0();
   double t1 = selectedRegion.t1();
   // SelectedRegion guarantees t0 <= t1, so we need another boolean argument
   // to indicate backwards play.
   const bool looped = options.playLooped;

   if (backwards)
      std::swap(t0, t1);

   SetPlay(true, appearance);

   if (gAudioIO->IsBusy()) {
      SetPlay(false);
      return -1;
   }

   const bool cutpreview = appearance == PlayAppearance::CutPreview;
   if (cutpreview && t0==t1) {
      SetPlay(false);
      return -1; /* msmeyer: makes no sense */
   }

   AudacityProject *p = GetActiveProject();
   if (!p) {
      SetPlay(false);
      return -1;  // Should never happen, but...
   }

   TrackList *t = p->GetTracks();
   if (!t) {
      mPlay->PopUp();
      return -1;  // Should never happen, but...
   }

   p->mLastPlayMode = mode;

   bool hasaudio = false;
   TrackListIterator iter(t);
   for (Track *trk = iter.First(); trk; trk = iter.Next()) {
      if (trk->GetKind() == Track::Wave
#ifdef EXPERIMENTAL_MIDI_OUT
         || trk->GetKind() == Track::Note
#endif
         ) {
         hasaudio = true;
         break;
      }
   }

   double latestEnd = (playWhiteSpace)? t1 : t->GetEndTime();

   if (!hasaudio) {
      SetPlay(false);
      return -1;  // No need to continue without audio tracks
   }

#if defined(EXPERIMENTAL_SEEK_BEHIND_CURSOR)
   double init_seek = 0.0;
#endif

   if (t1 == t0) {
      if (looped) {
         // play selection if there is one, otherwise
         // set start of play region to project start, 
         // and loop the project from current play position.

         if ((t0 > p->GetSel0()) && (t0 < p->GetSel1())) {
            t0 = p->GetSel0();
            t1 = p->GetSel1();
         }
         else {
            // loop the entire project
            t0 = t->GetStartTime();
            t1 = t->GetEndTime();
         }
      } else {
         // move t0 to valid range
         if (t0 < 0) {
            t0 = t->GetStartTime();
         }
         else if (t0 > t->GetEndTime()) {
            t0 = t->GetEndTime();
         }
#if defined(EXPERIMENTAL_SEEK_BEHIND_CURSOR)
         else {
            init_seek = t0;         //AC: init_seek is where playback will 'start'
            t0 = t->GetStartTime();
//.........这里部分代码省略.........

bool AudacityPrintout::OnPrintPage(int page)
{
   wxDC *dc = GetDC();
   if (!dc)
      return false;

   int width, height;
   dc->GetSize(&width, &height);

   int rulerScreenHeight = 40;
   int screenTotalHeight = mTracks->GetHeight() + rulerScreenHeight;

   double scale = height / (double)screenTotalHeight;

   int rulerPageHeight = (int)(rulerScreenHeight * scale);
   Ruler ruler;
   ruler.SetBounds(0, 0, width, rulerPageHeight);
   ruler.SetOrientation(wxHORIZONTAL);
   ruler.SetRange(0.0, mTracks->GetEndTime());
   ruler.SetFormat(Ruler::TimeFormat);
   ruler.SetLabelEdges(true);
   ruler.Draw(*dc);

   TrackArtist artist;
   artist.SetBackgroundBrushes(*wxWHITE_BRUSH, *wxWHITE_BRUSH,
			       *wxWHITE_PEN, *wxWHITE_PEN);
   ViewInfo viewInfo;
   viewInfo.sel0 = viewInfo.sel1 = 0;
   viewInfo.vpos = 0;
   viewInfo.h = 0.0;
   viewInfo.screen = mTracks->GetEndTime() - viewInfo.h;
   viewInfo.total = viewInfo.screen;
   viewInfo.zoom = viewInfo.lastZoom = width / viewInfo.screen;
   int y = rulerPageHeight;

   TrackListIterator iter(mTracks);
   Track *n = iter.First();
   while (n) {
      wxRect r;
      r.x = 0;
      r.y = y;
      r.width = width;
      r.height = (int)(n->GetHeight() * scale);

      switch(n->GetKind()) {
      case Track::Wave:
         switch (((WaveTrack *)n)->GetDisplay()) {
         case WaveTrack::WaveformDisplay:
            artist.DrawWaveform((WaveTrack *)n, *dc, r,
                                &viewInfo, false, false, false, false, false);
            break;
         case WaveTrack::WaveformDBDisplay:
            artist.DrawWaveform((WaveTrack *)n, *dc, r,
                                &viewInfo, false, false, false, true, false);
            break;
         case WaveTrack::SpectrumDisplay:
            artist.DrawSpectrum((WaveTrack *)n, *dc, r, &viewInfo, false);
            break;
         case WaveTrack::PitchDisplay:
            artist.DrawSpectrum((WaveTrack *)n, *dc, r, &viewInfo, true);
            break;
         }
         break;
      case Track::Note:
         artist.DrawNoteTrack((NoteTrack *)n, *dc, r, &viewInfo);
         break;
      case Track::Label:
         artist.DrawLabelTrack((LabelTrack *)n, *dc, r, &viewInfo);
         break;
      case Track::Time:
         artist.DrawTimeTrack((TimeTrack *)n, *dc, r, &viewInfo);
         break;
      }

      dc->SetPen(*wxBLACK_PEN);
      dc->DrawLine(0, r.y, width, r.y);

      n = iter.Next();
      y += r.height;
   };

   return true;
}

bool AudacityPrintout::OnPrintPage(int WXUNUSED(page))
{
   wxDC *dc = GetDC();
   if (!dc)
      return false;

   int width, height;
   dc->GetSize(&width, &height);

   int rulerScreenHeight = 40;
   int screenTotalHeight = mTracks->GetHeight() + rulerScreenHeight;

   double scale = height / (double)screenTotalHeight;

   int rulerPageHeight = (int)(rulerScreenHeight * scale);
   Ruler ruler;
   ruler.SetBounds(0, 0, width, rulerPageHeight);
   ruler.SetOrientation(wxHORIZONTAL);
   ruler.SetRange(0.0, mTracks->GetEndTime());
   ruler.SetFormat(Ruler::TimeFormat);
   ruler.SetLabelEdges(true);
   ruler.Draw(*dc);

   TrackArtist artist;
   artist.SetBackgroundBrushes(*wxWHITE_BRUSH, *wxWHITE_BRUSH,
                               *wxWHITE_PEN, *wxWHITE_PEN);
   const double screenDuration = mTracks->GetEndTime();
   ZoomInfo zoomInfo(0.0, width / screenDuration);
   int y = rulerPageHeight;

   TrackListIterator iter(mTracks);
   Track *n = iter.First();
   while (n) {
      wxRect r;
      r.x = 0;
      r.y = y;
      r.width = width;
      r.height = (int)(n->GetHeight() * scale);

      artist.DrawTrack(n, *dc, r, SelectedRegion(), zoomInfo, false, false, false, false);

      dc->SetPen(*wxBLACK_PEN);
      AColor::Line(*dc, 0, r.y, width, r.y);

#ifdef EXPERIMENTAL_OUTPUT_DISPLAY
      if(MONO_WAVE_PAN(n)){
         y += r.height;
         r.x = 0;
         r.y = y;
         r.width = width;
         r.height = (int)(n->GetHeight(true) * scale);
         artist.DrawTrack(
            n, *dc, r, SelectedRegion{}, zoomInfo, false, false, false, false);
         dc->SetPen(*wxBLACK_PEN);
         AColor::Line(*dc, 0, r.y, width, r.y);
      }
#endif
      n = iter.Next();
      y += r.height;
   };

   return true;
}

void ControlToolBar::PlayPlayRegion(double t0, double t1,
                                    bool looped /* = false */)
{
   if (gAudioIO->IsBusy()) {
      mPlay->PopUp();
      #if (AUDACITY_BRANDING == BRAND_THINKLABS)
         mLoopPlay->PopUp();
      #elif (AUDACITY_BRANDING == BRAND_AUDIOTOUCH)
         mPlay->Show();
         mPause->Hide();
         this->EnablePauseCommand(false);
      #endif
      return;
   }
  
   mStop->Enable();
   mRewind->Disable();
   mRecord->Disable();
   mFF->Disable();
   mPause->Enable();
   this->EnablePauseCommand(true);
   
   AudacityProject *p = GetActiveProject();
   if (p) {
      TrackList *t = p->GetTracks();
      double maxofmins,minofmaxs;
      
      // JS: clarified how the final play region is computed;
      
      if (t1 == t0) {
         // msmeyer: When playing looped, we play the whole file, if
         // no range is selected. Otherwise, we play from t0 to end
         if (looped) {
            // msmeyer: always play from start
            t0 = t->GetStartTime();
         } else {
            // move t0 to valid range
            if (t0 < 0)
               t0 = t->GetStartTime();
            if (t0 > t->GetEndTime())
               t0 = t->GetEndTime();
         }
         
         // always play to end
         t1 = t->GetEndTime();
      }
      else {
         // always t0 < t1 right?

         // the set intersection between the play region and the
         // valid range maximum of lower bounds
         if (t0 < t->GetStartTime())
            maxofmins = t->GetStartTime();
         else
            maxofmins = t0;
         
         // minimum of upper bounds
         if (t1 > t->GetEndTime())
            minofmaxs = t->GetEndTime();
         else
            minofmaxs = t1;

         // we test if the intersection has no volume 
         if (minofmaxs <= maxofmins) {
            // no volume; play nothing
            return;
         }
         else {
            t0 = maxofmins;
            t1 = minofmaxs;
         }
      }

      bool success = false;
      if (t1 > t0) {
         int token =
            gAudioIO->StartStream(t->GetWaveTrackArray(false),
                                  WaveTrackArray(), t->GetTimeTrack(),
                                  p->GetRate(), t0, t1, looped);
         if (token != 0) {
            success = true;
            p->SetAudioIOToken(token);
            mBusyProject = p;
            SetVUMeters(p);
         }
         else {
            // msmeyer: Show error message if stream could not be opened
            wxMessageBox(_("Error while opening sound device. Please check the output "
                           "device settings and the project sample rate."),
                         _("Error"), wxOK | wxICON_EXCLAMATION, this);
         }
      }

      if (!success) {
         SetPlay(false);
         SetStop(false);
         SetRecord(false);
      }
      #if (AUDACITY_BRANDING == BRAND_AUDIOTOUCH)
         if (success)
//.........这里部分代码省略.........

void ControlToolBar::OnRecord(wxCommandEvent &evt)
{
   if (gAudioIO->IsBusy()) {
      #if (AUDACITY_BRANDING == BRAND_AUDIOTOUCH)
         if (mIsLocked) // Stop only if in locked mode. 
         {
            this->StopPlaying(); // Stop recording.
            mRecord->PopUp();
         }
         else
         {
            //v evt.GetClassInfo();
         }
      #else
         mRecord->PopUp();
      #endif
      return;
   }

   mPlay->Disable();
   #if (AUDACITY_BRANDING == BRAND_THINKLABS)
      mLoopPlay->Disable();
   #endif

   #if (AUDACITY_BRANDING == BRAND_AUDIOTOUCH)
      mStop->SetEnabled(mIsLocked);
   #else
      mStop->Enable();
   #endif
   mRewind->Disable();
   mFF->Disable();
   #if (AUDACITY_BRANDING == BRAND_AUDIOTOUCH)
      mPause->SetEnabled(mIsLocked);
      this->EnablePauseCommand(mIsLocked);
      this->SetRecord(mIsLocked); // If locked, push Record down, else up.
   #else
      mPause->Enable();
      mRecord->PushDown();
   #endif

   AudacityProject *p = GetActiveProject();
   if (p) {
      TrackList *t = p->GetTracks();

      // Don't do this for Audiotouch. Not necessary. The performance hit is in the track being recorded, below.
      #if (AUDACITY_BRANDING == BRAND_THINKLABS)
         // For versions that default to dual wave/spectrum display, 
         // switch all tracks to WaveformDisplay on Record, for performance.
         TrackListIterator iter(t);
         for (Track* pTrack = iter.First(); pTrack; pTrack = iter.Next())
            if (pTrack->GetKind() == Track::Wave)
               ((WaveTrack*)pTrack)->SetDisplay(WaveTrack::WaveformDisplay);
      #endif

      double t0 = p->GetSel0();
      double t1 = p->GetSel1();
      if (t1 == t0)
         t1 = 1000000000.0;     // record for a long, long time (tens of years)
      #if (AUDACITY_BRANDING == BRAND_AUDIOTOUCH)
         if (p->m_bWantAppendRecording)
         {
            t0 = t->GetEndTime();
            t1 = 1000000000.0;     // record for a long, long time (tens of years)
         }
         gAudioIO->SetWantLatencyCorrection(!p->m_bWantAppendRecording);
      #endif

      /* TODO: set up stereo tracks if that is how the user has set up
       * their preferences, and choose sample format based on prefs */
      WaveTrackArray newRecordingTracks, playbackTracks;

      bool duplex;
      gPrefs->Read("/AudioIO/Duplex", &duplex, true);
      int recordingChannels = gPrefs->Read("/AudioIO/RecordChannels", 1);

      if( duplex )
         playbackTracks = t->GetWaveTrackArray(false);
      else
         playbackTracks = WaveTrackArray();

      for( int c = 0; c < recordingChannels; c++ )
      {
         WaveTrack *newTrack = p->GetTrackFactory()->NewWaveTrack();
         newTrack->SetOffset(t0);
         newTrack->SetRate(p->GetRate());

         //v for performance     newTrack->SetDisplay(WaveTrack::WaveformAndSpectrumDisplay);
         newTrack->SetDisplay(WaveTrack::WaveformDisplay); 
         
         if( recordingChannels == 2 )
         {
            if( c == 0 )
            {
               newTrack->SetChannel(Track::LeftChannel);
               newTrack->SetLinked(true);
            }
            else
               newTrack->SetChannel(Track::RightChannel);
         }
         else
//.........这里部分代码省略.........