C++ Track::GetKind方法代码示例

Track *SyncLockedTracksIterator::Prev(bool skiplinked)
{
   Track *t = TrackListIterator::Prev(skiplinked);

   //
   // Ways to end a sync-locked group in reverse
   //

   // Beginning of tracks
   if (!t)
      return NULL;

   // In wave section, encounter a label track
   if (!mInLabelSection && t->GetKind() == Track::Label) {
      cur = NULL;
      return NULL;
   }
#ifndef USE_MIDI
   // Encounter a non-wave non-label track
   if (t->GetKind() != Track::Wave && t->GetKind() != Track::Label) {
      cur = NULL;
      return NULL;
   }
#endif
   // Otherwise, check if we're in the label section
   mInLabelSection = (t->GetKind() == Track::Label);

   return t;
}

void ControlToolBar::EnableDisableButtons()
{
   //TIDY-ME: Button logic could be neater.
   AudacityProject *p = GetActiveProject();
   bool tracks = false;
   bool playing = mPlay->IsDown();
   bool recording = mRecord->IsDown();
   bool busy = gAudioIO->IsBusy() || playing || recording;

   // Only interested in audio type tracks
   if (p) {
      TrackListIterator iter( p->GetTracks() );
      for (Track *t = iter.First(); t; t = iter.Next()) {
         if (t->GetKind() == Track::Wave
#if defined(USE_MIDI)
         || t->GetKind() == Track::Note
#endif
         ) {
            tracks = true;
            break;
         }
      }
   }

   mPlay->SetEnabled((!recording) || (tracks && !busy));
   mRecord->SetEnabled(!busy && !playing);

   mStop->SetEnabled(busy);
   mRewind->SetEnabled(!busy);
   mFF->SetEnabled(tracks && !busy);
   mPause->SetEnabled(true);
}

bool LabelDialog::TransferDataFromWindow()
{
   int cnt = mData.size();
   int i;
   TrackListIterator iter(mTracks);
   Track *t;
   int tndx = 0;

   // Clear all label tracks of labels
   for (t = iter.First(); t; t = iter.Next()) {
      if (t->GetKind() == Track::Label) {
         LabelTrack *lt = (LabelTrack *)t;
         tndx++;

         for (i = lt->GetNumLabels() - 1; i >= 0 ; i--) {
            lt->DeleteLabel(i);
         }
      }
   }

   // Create any added tracks
   while (tndx < (int)mTrackNames.GetCount() - 1) {

      // Extract the name
      wxString name = mTrackNames[tndx + 1].AfterFirst(wxT('-')).Mid(1);

      // Create the NEW track and add to track list
      auto newTrack = mFactory.NewLabelTrack();
      newTrack->SetName(name);
      mTracks->Add(std::move(newTrack));
      tndx++;
   }

   // Repopulate with updated labels
   for (i = 0; i < cnt; i++) {
      RowData &rd = mData[i];

      // Look for track with matching index
      tndx = 1;
      for (t = iter.First(); t; t = iter.Next()) {
         if (t->GetKind() == Track::Label && rd.index == tndx++) {
            break;
         }
      }
      wxASSERT(t);
      if (!t)
         return false;

      // Add the label to it
      ((LabelTrack *) t)->AddLabel(rd.selectedRegion, rd.title);
      ((LabelTrack *) t)->Unselect();
   }

   return true;
}

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 LabelDialog::TransferDataFromWindow()
{
   int cnt = mData.GetCount();
   int i;
   TrackListIterator iter(mTracks);
   Track *t;
   int tndx = 0;

   // Clear all label tracks of labels
   for (t = iter.First(); t; t = iter.Next()) {
      if (t->GetKind() == Track::Label) {
         LabelTrack *lt = (LabelTrack *)t;
         tndx++;

         for (i = lt->GetNumLabels() - 1; i >= 0 ; i--) {
            lt->DeleteLabel(i);
         }
      }
   }

   // Create any added tracks
   while (tndx < (int)mTrackNames.GetCount() - 1) {

      // Extract the name
      wxString name = mTrackNames[tndx + 1].AfterFirst(wxT('-')).Mid(1);

      // Create the new track and add to track list
      LabelTrack *newTrack = new LabelTrack(mDirManager);
      newTrack->SetName(name);
      mTracks->Add(newTrack);
      tndx++;
   }

   // Repopulate with updated labels
   for (i = 0; i < cnt; i++) {
      RowData *rd = mData[i];

      // Look for track with matching index
      tndx = 1;
      for (t = iter.First(); t; t = iter.Next()) {
         if (t->GetKind() == Track::Label && rd->index == tndx++) {
            break;
         }
      }

      // Add the label to it
      if (!rd->title.IsEmpty()) {
         ((LabelTrack *) t)->AddLabel(rd->stime, rd->etime, rd->title);
         ((LabelTrack *) t)->Unselect();
      }
   }

   return true;
}

void ExportMultiple::CountTracksAndLabels()
{
   mLabels = NULL;
   mNumLabels = 0;
   mNumWaveTracks = 0;

   Track* pTrack;
   for (pTrack = mIterator.First(mTracks); pTrack != NULL; pTrack = mIterator.Next())
   {
      switch (pTrack->GetKind())
      {
         // Count WaveTracks, and for linked pairs, count only the second of the pair.
         case Track::Wave:
         {
            if (pTrack->GetLinked() == false)
               mNumWaveTracks++;
            break;
         }
         case Track::Label:
         {
            // Supports only one LabelTrack. 
            if (mLabels == NULL) {
               mLabels = (LabelTrack*)pTrack;
               mNumLabels = mLabels->GetNumLabels();
            }
            break;
         }
      }
   }
}

UIHandle::Result LabelDefaultClickHandle::Click
(const TrackPanelMouseEvent &evt, AudacityProject *pProject)
{
   using namespace RefreshCode;
   // Redraw to show the change of text box selection status
   UIHandle::Result result = RefreshAll;

   if (evt.event.LeftDown())
   {
      SaveState( pProject );

      TrackList *const tracks = pProject->GetTracks();
      TrackListIterator iter(tracks);
      Track *n = iter.First();

      while (n) {
         if (n->GetKind() == Track::Label && evt.pCell.get() != n) {
            LabelTrack *const lt = static_cast<LabelTrack*>(n);
            lt->ResetFlags();
            lt->Unselect();
         }
         n = iter.Next();
      }
   }

   return result;
}

void ExportMultiple::CountTracksAndLabels()
{
   mLabels = NULL;
   mNumLabels = 0;
   mNumWaveTracks = 0;

   Track* pTrack;
   for (pTrack = mIterator->First(mTracks); pTrack != NULL; pTrack = mIterator->Next())
   {
      switch (pTrack->GetKind())
      {
         // Count WaveTracks, and for linked pairs, count only the second of the pair.
         case Track::Wave:
         {
            if (!pTrack->GetMute() && !pTrack->GetLinked()) // Don't count muted tracks.
               mNumWaveTracks++;
            break;
         }

         // Only support one label track???
         case Track::Label:
         {
            // Supports only one LabelTrack.
            if (mLabels == NULL) {
               mLabels = (LabelTrack*)pTrack;
               mNumLabels = mLabels->GetNumLabels();
            }
            break;
         }
      }
   }
}

int TrackList::GetNumExportChannels(bool selectionOnly)
{
   /* counters for tracks panned different places */
   int numLeft = 0;
   int numRight = 0;
   int numMono = 0;
   /* track iteration kit */
   Track *tr;
   TrackListIterator iter;

   for (tr = iter.First(this); tr != NULL; tr = iter.Next()) {

      // Want only unmuted wave tracks.
      if ((tr->GetKind() != Track::Wave) || tr->GetMute())
         continue;

      // do we only want selected ones?
      if (selectionOnly && !(tr->GetSelected())) {
         //want selected but this one is not
         continue;
      }

      // Found a left channel
      if (tr->GetChannel() == Track::LeftChannel) {
         numLeft++;
      }

      // Found a right channel
      else if (tr->GetChannel() == Track::RightChannel) {
         numRight++;
      }

      // Found a mono channel, but it may be panned
      else if (tr->GetChannel() == Track::MonoChannel) {
         float pan = ((WaveTrack*)tr)->GetPan();

         // Figure out what kind of channel it should be
         if (pan == -1.0) {   // panned hard left
            numLeft++;
         }
         else if (pan == 1.0) {  // panned hard right
            numRight++;
         }
         else if (pan == 0) { // panned dead center
            numMono++;
         }
         else {   // panned somewhere else
            numLeft++;
            numRight++;
         }
      }
   }

   // if there is stereo content, report 2, else report 1
   if (numRight > 0 || numLeft > 0) {
      return 2;
   }

   return 1;
}

bool ODTask::IsTaskAssociatedWithProject(AudacityProject* proj)
{
   TrackList *tracks = proj->GetTracks();
   TrackListIterator iter1(tracks);
   Track *tr = iter1.First();

   while (tr)
   {
      //go over all tracks in the project
      if (tr->GetKind() == Track::Wave)
      {
         //look inside our task's track list for one that matches this projects one.
         mWaveTrackMutex.Lock();
         for(int i=0;i<(int)mWaveTracks.size();i++)
         {
            if(mWaveTracks[i]==tr)
            {
               //if we find one, then the project is associated with us;return true
               mWaveTrackMutex.Unlock();
               return true;
            }
         }
         mWaveTrackMutex.Unlock();
      }
      tr = iter1.Next();
   }

   return false;

}

int ExportMultiple::ShowModal()
{
   Track *tr;

   mLabels = NULL;
   mNumLabels = 0;
   mNumTracks = 0;

   // Examine the track list looking for Wave and Label tracks
   for (tr = mIterator.First(mTracks); tr != NULL; tr = mIterator.Next()) {
      switch (tr->GetKind())
      {
         // Only count WaveTracks, and for linked pairs, only count the
         // second one of the pair
         case Track::Wave:
         {
            if (tr->GetLinked() == false) {
               mNumTracks++;
            }

            break;
         }

         // Only support one label track???
         case Track::Label:
         {
            if (mLabels == NULL) {
               mLabels = (LabelTrack *)tr;
               mNumLabels = mLabels->GetNumLabels();
            }

            break;
         }
      }
   }

   if (mNumTracks < 2 && mNumLabels < 1) {
      ::wxMessageBox(_("If you have more than one Audio Track, you can export each track as a separate file,\nor if you have a Label Track, you can export a new file for each label.\n\nThis project does not have multiple tracks or a Label Track, so you cannot export multiple files."),
                     _("Can't export multiple files"),
                     wxOK | wxCENTRE, this);
      return wxID_CANCEL;
   }

   if (mNumLabels < 1) {
      mLabel->Enable(false);
      mTrack->SetValue(true);
      mLabel->SetValue(false);
   }

   if (mNumTracks < 2) {
      mTrack->Enable(false);
      mLabel->SetValue(true);
      mTrack->SetValue(false);
   }

   EnableControls();

   return wxDialog::ShowModal();
}

void FreqWindow::GetAudio()
{
   mData.reset();
   mDataLen = 0;

   int selcount = 0;
   bool warning = false;
   TrackListIterator iter(p->GetTracks());
   Track *t = iter.First();
   while (t) {
      if (t->GetSelected() && t->GetKind() == Track::Wave) {
         WaveTrack *track = (WaveTrack *)t;
         if (selcount==0) {
            mRate = track->GetRate();
            auto start = track->TimeToLongSamples(p->mViewInfo.selectedRegion.t0());
            auto end = track->TimeToLongSamples(p->mViewInfo.selectedRegion.t1());
            auto dataLen = end - start;
            if (dataLen > 10485760) {
               warning = true;
               mDataLen = 10485760;
            }
            else
               // dataLen is not more than 10 * 2 ^ 20
               mDataLen = dataLen.as_size_t();
            mData = Floats{ mDataLen };
            // Don't allow throw for bad reads
            track->Get((samplePtr)mData.get(), floatSample, start, mDataLen,
                       fillZero, false);
         }
         else {
            if (track->GetRate() != mRate) {
               AudacityMessageBox(_("To plot the spectrum, all selected tracks must be the same sample rate."));
               mData.reset();
               mDataLen = 0;
               return;
            }
            auto start = track->TimeToLongSamples(p->mViewInfo.selectedRegion.t0());
            Floats buffer2{ mDataLen };
            // Again, stop exceptions
            track->Get((samplePtr)buffer2.get(), floatSample, start, mDataLen,
                       fillZero, false);
            for (size_t i = 0; i < mDataLen; i++)
               mData[i] += buffer2[i];
         }
         selcount++;
      }
      t = iter.Next();
   }

   if (selcount == 0)
      return;

   if (warning) {
      wxString msg;
      msg.Printf(_("Too much audio was selected.  Only the first %.1f seconds of audio will be analyzed."),
                          (mDataLen / mRate));
      AudacityMessageBox(msg);
   }
}

void ControlToolBar::EnableDisableButtons()
{
   AudacityProject *p = GetActiveProject();
   bool tracks = false;

   bool playing = mPlay->IsDown();
   bool recording = mRecord->IsDown();
   bool busy = gAudioIO->IsBusy();

   // Only interested in audio type tracks
   if (p) {
      TrackListIterator iter( p->GetTracks() );
      for (Track *t = iter.First(); t; t = iter.Next()) {
         if (t->GetKind() == Track::Wave
#if defined(USE_MIDI)
         || t->GetKind() == Track::Note
#endif
         ) {
            tracks = true;
            break;
         }
      }
   }

   if (p) {
      TranscriptionToolBar *const playAtSpeedTB = p->GetTranscriptionToolBar();
      if (playAtSpeedTB)
         playAtSpeedTB->SetEnabled(CanStopAudioStream() && tracks && !recording);
   }

   mPlay->SetEnabled(CanStopAudioStream() && tracks && !recording);
   mRecord->SetEnabled(
      CanStopAudioStream() &&
      !(busy && !recording) &&
      !playing
   );
   mStop->SetEnabled(CanStopAudioStream() && (playing || recording));
   mRewind->SetEnabled(!playing && !recording);
   mFF->SetEnabled(tracks && !playing && !recording);

   auto pProject = GetActiveProject();
   mPause->SetEnabled(CanStopAudioStream());
}

void ControlToolBar::EnableDisableButtons()
{
   //TIDY-ME: Button logic could be neater.
   AudacityProject *p = GetActiveProject();
   size_t numProjects = gAudacityProjects.Count();
   bool tracks = false;
   bool cleaningSpeech = mBatch->IsDown();
   bool playing = mPlay->IsDown();
   bool recording = mRecord->IsDown();
   bool busy = gAudioIO->IsBusy() || playing || recording;

   // Only interested in audio type tracks
   if (p) {
      TrackListIterator iter( p->GetTracks() );
      for (Track *t = iter.First(); t; t = iter.Next()) {
         if (t->GetKind() == Track::Wave
#if defined(USE_MIDI)
         || t->GetKind() == Track::Note
#endif          
         ) {
            tracks = true;
            break;
         }
      }
   }

   mPlay->SetEnabled((!recording) || (tracks && !busy && !cleaningSpeech));
   mRecord->SetEnabled(!busy && !playing);

   if (p && GetActiveProject()->GetCleanSpeechMode()) {
       bool canRecord = !tracks;
       canRecord &= !cleaningSpeech;
       canRecord &= !busy;
       canRecord &= ((numProjects == 0) || ((numProjects == 1) && !tracks));
       mRecord->SetEnabled(canRecord);
       mBatch->SetEnabled(!busy && !recording);
   }

   mStop->SetEnabled(busy && !cleaningSpeech);
   mRewind->SetEnabled(tracks && !busy);
   mFF->SetEnabled(tracks && !busy);
   mPause->SetEnabled(true);
}

bool EffectReverse::Process()
{
   //Track::All is needed because Reverse should move the labels too
   this->CopyInputTracks(Track::All); // Set up mOutputTracks.
   bool bGoodResult = true;

   TrackListIterator iter(mOutputTracks);
   Track *t = iter.First();
   int count = 0;
   while (t) {
      if (t->GetKind() == Track::Wave &&
            (t->GetSelected() || t->IsSyncLockSelected()))
      {
         WaveTrack *track = (WaveTrack*)t;

         if (mT1 > mT0) {
            sampleCount start = track->TimeToLongSamples(mT0);
            sampleCount end = track->TimeToLongSamples(mT1);
            sampleCount len = (sampleCount)(end - start);

            if (!ProcessOneWave(count, track, start, len))
            {
               bGoodResult = false;
               break;
            }
         }
      }
      else if (t->GetKind() == Track::Label &&
            (t->GetSelected() || t->IsSyncLockSelected()))
      {
         LabelTrack *track = (LabelTrack*)t;
         track->ChangeLabelsOnReverse(mT0, mT1);
      }
      t = iter.Next();
      count++;
   }

   this->ReplaceProcessedTracks(bGoodResult); 
   return bGoodResult;
}