improved render channel count system

app/widget/viewer/viewer.cpp

@@ -37,7 +37,6 @@
 #include "config/config.h"
 #include "project/item/sequence/sequence.h"
 #include "project/project.h"
-#include "render/pixelformat.h"
 #include "render/rendermanager.h"
 #include "task/taskmanager.h"
 #include "widget/menu/menu.h"
@@ -113,9 +112,6 @@ ViewerWidget::ViewerWidget(QWidget *parent) :
   connect(waveform_view_, &AudioWaveformView::TimeChanged, this, &ViewerWidget::TimeChangedFromWaveform);
   connect(waveform_view_, &AudioWaveformView::customContextMenuRequested, this, &ViewerWidget::ShowContextMenu);
 
-  // Ensures renderer is updated if the global pixel format is changed
-  connect(PixelFormat::instance(), &PixelFormat::FormatChanged, this, &ViewerWidget::UpdateRendererVideoParameters);
-
   connect(&playback_backup_timer_, &QTimer::timeout, this, &ViewerWidget::PlaybackTimerUpdate);
 
   SetAutoMaxScrollBar(true);
@@ -616,11 +612,6 @@ void ViewerWidget::RequestNextFrameForQueue()
   watcher->SetTicket(GetFrame(next_time, false));
 }
 
-PixelFormat::Format ViewerWidget::GetCurrentPixelFormat() const
-{
-  return PixelFormat::instance()->GetConfiguredFormatForMode(RenderMode::kOffline);
-}
-
 RenderTicketPtr ViewerWidget::GetFrame(const rational &t, bool clear_render_queue)
 {
   QByteArray cached_hash = GetConnectedNode()->video_frame_cache()->GetHash(t);