anonymous_namespace{SampleHandle.cpp} Namespace Reference

Functions
double	adjustTime (const WaveChannel &wt, double time)
bool	SampleResolutionTest (const ViewInfo &viewInfo, const WaveChannelInterval &clip, const ZoomInfo::Intervals &intervals)
size_t	GetLastEditableClipStartingFromNthClip (size_t n, bool forward, const WaveChannelUtilities::ClipPointers &sortedClips, const ViewInfo &viewInfo, const ZoomInfo::Intervals &intervals)

Function Documentation

adjustTime()

double anonymous_namespace{SampleHandle.cpp}::adjustTime ( const WaveChannel &  wt, double  time  )

inline

Definition at line 85 of file SampleHandle.cpp.

   {
      // Round to an exact sample time
      const auto clip = WaveChannelUtilities::GetClipAtTime(wt, time);
      if (!clip)
         return wt.SnapToSample(time);
      const auto sampleOffset =
         clip->TimeToSamples(time - clip->GetPlayStartTime());
      return clip->SamplesToTime(sampleOffset) + clip->GetPlayStartTime();
   }

References WaveChannelUtilities::GetClipAtTime(), and WideSampleSequence::SnapToSample().

Referenced by SampleHandle::HitTest().

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GetLastEditableClipStartingFromNthClip()

size_t anonymous_namespace{SampleHandle.cpp}::GetLastEditableClipStartingFromNthClip	(	size_t	n,
		bool	forward,
		const WaveChannelUtilities::ClipPointers &	sortedClips,
		const ViewInfo &	viewInfo,
		const ZoomInfo::Intervals &	intervals
	)

Definition at line 331 of file SampleHandle.cpp.

{
   assert(n < sortedClips.size());
   const auto increment = forward ? 1 : -1;
   int last = n + increment;
   const auto limit = forward ? sortedClips.size() : -1;
   while (last != limit)
   {
      if (!SampleResolutionTest(viewInfo, *sortedClips[last], intervals))
         break;
      last += increment;
   }
   last -= increment;
   assert(last >= 0 && last < sortedClips.size());
   return last;
}

References forward, and SampleResolutionTest().

Referenced by SampleHandle::Drag().

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SampleResolutionTest()

bool anonymous_namespace{SampleHandle.cpp}::SampleResolutionTest	(	const ViewInfo &	viewInfo,
		const WaveChannelInterval &	clip,
		const ZoomInfo::Intervals &	intervals
	)

Definition at line 98 of file SampleHandle.cpp.

   {
      // Require more than 3 pixels per sample
      const auto xx = std::max<ZoomInfo::int64>(
         0, viewInfo.TimeToPosition(clip.GetPlayStartTime()));
      const double rate = clip.GetRate() / clip.GetStretchRatio();
      ZoomInfo::Intervals::const_iterator it = intervals.begin(),
         end = intervals.end(), prev;
      wxASSERT(it != end && it->position == 0);
      do
         prev = it++;
      while (it != end && it->position <= xx);
      const double threshold = 3 * rate;
      // three times as many pixels per second, as samples
      return prev->averageZoom > threshold;
   }

References details::end(), WaveClipChannel::GetPlayStartTime(), WaveClipChannel::GetRate(), WaveClipChannel::GetStretchRatio(), and ZoomInfo::TimeToPosition().

Referenced by SampleHandle::Click(), GetLastEditableClipStartingFromNthClip(), and SampleHandle::HitTest().

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