#include <WaveTrackView.h>

Collaboration diagram for ClipParameters:

Public Member Functions
	ClipParameters (bool spectrum, const SampleTrack track, const WaveClip clip, const wxRect &rect, const SelectedRegion &selectedRegion, const ZoomInfo &zoomInfo)

Static Public Member Functions
static wxRect	GetClipRect (const WaveClip &clip, const ZoomInfo &zoomInfo, const wxRect &viewRect, bool *outShowSamples=nullptr)

Public Attributes
double	tOffset

double	rate

double	h

double	tpre

double	h1

double	tpost

double	t0

double	t1

double	averagePixelsPerSample

bool	showIndividualSamples

sampleCount	ssel0

sampleCount	ssel1

wxRect	hiddenMid

int	hiddenLeftOffset

wxRect	mid

int	leftOffset

Detailed Description

Definition at line 240 of file WaveTrackView.h.

Constructor & Destructor Documentation

◆ ClipParameters()

ClipParameters::ClipParameters	(	bool	spectrum,
		const SampleTrack *	track,
		const WaveClip *	clip,
		const wxRect &	rect,
		const SelectedRegion &	selectedRegion,
		const ZoomInfo &	zoomInfo
	)

Definition at line 1498 of file WaveTrackView.cpp.

{
   tOffset = clip->GetPlayStartTime();
   rate = clip->GetRate();
 
   h = zoomInfo.PositionToTime(0, 0
      , true
   );
   h1 = zoomInfo.PositionToTime(rect.width, 0
      , true
   );
 
   double sel0 = selectedRegion.t0();    //left selection bound
   double sel1 = selectedRegion.t1();    //right selection bound
 
   //If the track isn't selected, make the selection empty
   if (!track->GetSelected() &&
      (spectrum ||
       !SyncLock::IsSyncLockSelected(track))) { // PRL: why was there a difference for spectrum?
      sel0 = sel1 = 0.0;
   }
 
   const double trackLen = clip->GetPlayEndTime() - clip->GetPlayStartTime();
 
   tpre = h - tOffset;                 // offset corrected time of
   //  left edge of display
   tpost = h1 - tOffset;               // offset corrected time of
   //  right edge of display
 
   const double sps = 1. / rate;            //seconds-per-sample
 
   // Calculate actual selection bounds so that t0 > 0 and t1 < the
   // end of the track
   t0 = std::max(tpre, .0);
   t1 = std::min(tpost, trackLen - sps * .99) 
      + CalculateAdjustmentForZoomLevel(rect, zoomInfo, rate, averagePixelsPerSample, showIndividualSamples);
 
   // Make sure t1 (the right bound) is greater than 0
   if (t1 < 0.0) {
      t1 = 0.0;
   }
 
   // Make sure t1 is greater than t0
   if (t0 > t1) {
      t0 = t1;
   }
 
   // Use the WaveTrack method to show what is selected and 'should' be copied, pasted etc.
   ssel0 = std::max(sampleCount(0), spectrum
      ? sampleCount((sel0 - tOffset) * rate + .99) // PRL: why?
      : track->TimeToLongSamples(sel0 - tOffset)
   );
   ssel1 = std::max(sampleCount(0), spectrum
      ? sampleCount((sel1 - tOffset) * rate + .99) // PRL: why?
      : track->TimeToLongSamples(sel1 - tOffset)
   );
 
   //trim selection so that it only contains the actual samples
   if (ssel0 != ssel1 && ssel1 > (sampleCount)(0.5 + trackLen * rate)) {
      ssel1 = sampleCount( 0.5 + trackLen * rate );
   }
 
   // The variable "hiddenMid" will be the rectangle containing the
   // actual waveform, as opposed to any blank area before
   // or after the track, as it would appear without the fisheye.
   hiddenMid = rect;
 
   // If the left edge of the track is to the right of the left
   // edge of the display, then there's some unused area to the
   // left of the track.  Reduce the "hiddenMid"
   hiddenLeftOffset = 0;
   if (tpre < 0) {
      // Fix Bug #1296 caused by premature conversion to (int).
      wxInt64 time64 = zoomInfo.TimeToPosition(tOffset, 0 , true);
      if( time64 < 0 )
         time64 = 0;
      hiddenLeftOffset = (time64 < rect.width) ? (int)time64 : rect.width;
 
      hiddenMid.x += hiddenLeftOffset;
      hiddenMid.width -= hiddenLeftOffset;
   }
 
   // If the right edge of the track is to the left of the right
   // edge of the display, then there's some unused area to the right
   // of the track.  Reduce the "hiddenMid" rect by the
   // size of the blank area.
   if (tpost > t1) {
      wxInt64 time64 = zoomInfo.TimeToPosition(tOffset+t1, 0 , true);
      if( time64 < 0 )
         time64 = 0;
      const int hiddenRightOffset = (time64 < rect.width) ? (int)time64 : rect.width;
 
      hiddenMid.width = std::max(0, hiddenRightOffset - hiddenLeftOffset);
   }
   // The variable "mid" will be the rectangle containing the
   // actual waveform, as distorted by the fisheye,
   // as opposed to any blank area before or after the track.
   mid = rect;
 
   // If the left edge of the track is to the right of the left
   // edge of the display, then there's some unused area to the
   // left of the track.  Reduce the "mid"
   leftOffset = 0;
   if (tpre < 0) {
      wxInt64 time64 = zoomInfo.TimeToPosition(tOffset, 0 , false);
      if( time64 < 0 )
         time64 = 0;
      leftOffset = (time64 < rect.width) ? (int)time64 : rect.width;
 
      mid.x += leftOffset;
      mid.width -= leftOffset;
   }
 
   // If the right edge of the track is to the left of the right
   // edge of the display, then there's some unused area to the right
   // of the track.  Reduce the "mid" rect by the
   // size of the blank area.
   if (tpost > t1) {
      wxInt64 time64 = zoomInfo.TimeToPosition(tOffset+t1, 0 , false);
      if( time64 < 0 )
         time64 = 0;
      const int distortedRightOffset = (time64 < rect.width) ? (int)time64 : rect.width;
 
      mid.width = std::max(0, distortedRightOffset - leftOffset);
   }
}

References averagePixelsPerSample, anonymous_namespace{WaveTrackView.cpp}::CalculateAdjustmentForZoomLevel(), WaveClip::GetPlayEndTime(), WaveClip::GetPlayStartTime(), WaveClip::GetRate(), Track::GetSelected(), h, h1, hiddenLeftOffset, hiddenMid, SyncLock::IsSyncLockSelected(), leftOffset, mid, min(), ZoomInfo::PositionToTime(), rate, showIndividualSamples, ssel0, ssel1, SelectedRegion::t0(), t0, SelectedRegion::t1(), t1, SampleTrack::TimeToLongSamples(), ZoomInfo::TimeToPosition(), tOffset, tpost, and tpre.

Here is the call graph for this function:

Member Function Documentation

◆ GetClipRect()

wxRect ClipParameters::GetClipRect	(	const WaveClip &	clip,
		const ZoomInfo &	zoomInfo,
		const wxRect &	viewRect,
		bool *	outShowSamples = `nullptr`
	)

static

Definition at line 1627 of file WaveTrackView.cpp.

{
    auto srs = 1. / static_cast<double>(clip.GetRate());
    double averagePixelsPerSample{};
    bool showIndividualSamples{};
    auto clipEndingAdjustemt 
       = CalculateAdjustmentForZoomLevel(viewRect, zoomInfo, clip.GetRate(), averagePixelsPerSample, showIndividualSamples);
    if (outShowSamples != nullptr)
       *outShowSamples = showIndividualSamples;
    constexpr auto edgeLeft = static_cast<ZoomInfo::int64>(std::numeric_limits<int>::min());
    constexpr auto edgeRight = static_cast<ZoomInfo::int64>(std::numeric_limits<int>::max());
    auto left = std::clamp(
       zoomInfo.TimeToPosition(
          clip.GetPlayStartTime(), viewRect.x, true
       ), edgeLeft, edgeRight
    );
    auto right = std::clamp(
       zoomInfo.TimeToPosition(
          clip.GetPlayEndTime() - .99 * srs + clipEndingAdjustemt, viewRect.x, true
       ), edgeLeft, edgeRight
    );
    if (right >= left)
    {
        //after clamping we can expect that left and right 
        //are small enough to be put into int
        return wxRect(
           static_cast<int>(left), 
           viewRect.y, 
           std::max(1, static_cast<int>(right - left)), 
           viewRect.height
        );
    }
    return wxRect();
}