anonymous_namespace{LadspaInstance.cpp} Namespace Reference

Functions
std::pair< float, float >	InputControlPortBounds (const LADSPA_PortRangeHint &hint, double sampleRate)
float	ClampInputControlValue (const LADSPA_PortRangeHint &hint, float val, float lower, float upper)
float	InputControlPortDefaultValue (const LADSPA_PortRangeHint &hint, double sampleRate)

Function Documentation

ClampInputControlValue()

float anonymous_namespace{LadspaInstance.cpp}::ClampInputControlValue	(	const LADSPA_PortRangeHint &	hint,
		float	val,
		float	lower,
		float	upper
	)

Definition at line 61 of file LadspaInstance.cpp.

{
   if (LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor) && val < lower)
      val = lower;
   if (LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor) && val > upper)
      val = upper;
   return val;
}

References _LADSPA_PortRangeHint::HintDescriptor, LADSPA_IS_HINT_BOUNDED_ABOVE, and LADSPA_IS_HINT_BOUNDED_BELOW.

Referenced by InputControlPortDefaultValue().

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InputControlPortBounds()

std::pair< float, float > anonymous_namespace{LadspaInstance.cpp}::InputControlPortBounds	(	const LADSPA_PortRangeHint &	hint,
		double	sampleRate
	)

Definition at line 54 of file LadspaInstance.cpp.

{
   // Find lower and upper bound values for ths hint
   const auto multiplier =
      LADSPA_IS_HINT_SAMPLE_RATE(hint.HintDescriptor) ? sampleRate : 1.0;
   return { hint.LowerBound * multiplier, hint.UpperBound * multiplier };
}

References _LADSPA_PortRangeHint::HintDescriptor, LADSPA_IS_HINT_SAMPLE_RATE, _LADSPA_PortRangeHint::LowerBound, anonymous_namespace{ClipSegmentTest.cpp}::sampleRate, and _LADSPA_PortRangeHint::UpperBound.

Referenced by InputControlPortDefaultValue().

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InputControlPortDefaultValue()

float anonymous_namespace{LadspaInstance.cpp}::InputControlPortDefaultValue	(	const LADSPA_PortRangeHint &	hint,
		double	sampleRate
	)

Definition at line 70 of file LadspaInstance.cpp.

{
   // See comments in library header ladspa.h about interpretation of macros
   const auto bounds = InputControlPortBounds(hint, sampleRate);
 
   // Function to find low, middle, or high default values
   const auto combine = [bounds,
      logarithmic = LADSPA_IS_HINT_LOGARITHMIC(hint.HintDescriptor)
   ](float lowWeight, float highWeight){
      auto [lower, upper] = bounds;
      return logarithmic
         ? exp(log(lower) * lowWeight + log(upper) * highWeight)
         : lower * lowWeight + upper * highWeight;
   };
 
   auto [lower, upper] = bounds;
   auto val = 1.0f;
   // Four bits of the descriptor describe mutually exclusive cases
   switch (hint.HintDescriptor & LADSPA_HINT_DEFAULT_MASK) {
   case LADSPA_HINT_DEFAULT_NONE:
   default:
      break;
   case LADSPA_HINT_DEFAULT_MINIMUM:
      val = lower; break;
   case LADSPA_HINT_DEFAULT_LOW:
      val = combine(0.75, 0.25); break;
   case LADSPA_HINT_DEFAULT_MIDDLE:
      val = combine(0.5, 0.5); break;
   case LADSPA_HINT_DEFAULT_HIGH:
      val = combine(0.25, 0.75); break;
   case LADSPA_HINT_DEFAULT_MAXIMUM:
      val = upper; break;
   case LADSPA_HINT_DEFAULT_0:
      val = 0.0f; break;
   case LADSPA_HINT_DEFAULT_1:
      val = 1.0f; break;
   case LADSPA_HINT_DEFAULT_100:
      val = 100.0f; break;
   case LADSPA_HINT_DEFAULT_440:
      val = 440.0f; break;
   }
 
   return ClampInputControlValue(hint, val, lower, upper);
}

References ClampInputControlValue(), _LADSPA_PortRangeHint::HintDescriptor, InputControlPortBounds(), LADSPA_HINT_DEFAULT_0, LADSPA_HINT_DEFAULT_1, LADSPA_HINT_DEFAULT_100, LADSPA_HINT_DEFAULT_440, LADSPA_HINT_DEFAULT_HIGH, LADSPA_HINT_DEFAULT_LOW, LADSPA_HINT_DEFAULT_MASK, LADSPA_HINT_DEFAULT_MAXIMUM, LADSPA_HINT_DEFAULT_MIDDLE, LADSPA_HINT_DEFAULT_MINIMUM, LADSPA_HINT_DEFAULT_NONE, LADSPA_IS_HINT_LOGARITHMIC, and anonymous_namespace{ClipSegmentTest.cpp}::sampleRate.

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