anonymous_namespace{EffectStage.cpp} Namespace Reference

Functions
std::vector< std::shared_ptr< EffectInstance > >	MakeInstances (const EffectStage::Factory &factory, EffectSettings &settings, double sampleRate, const WideSampleSequence &sequence, std::optional< sampleCount > genLength, int channel)

Function Documentation

MakeInstances()

std::vector< std::shared_ptr< EffectInstance > > anonymous_namespace{EffectStage.cpp}::MakeInstances	(	const EffectStage::Factory &	factory,
		EffectSettings &	settings,
		double	sampleRate,
		const WideSampleSequence &	sequence,
		std::optional< sampleCount >	genLength,
		int	channel
	)

Definition at line 21 of file EffectStage.cpp.

{
   std::vector<std::shared_ptr<EffectInstance>> instances;
   // Make as many instances as needed for the channels of the track, which
   // depends on how the instances report how many channels they accept
   const auto nChannels = (channel < 0) ? sequence.NChannels() : 1;
   for (size_t ii = 0; ii < nChannels;) {
      auto pInstance = factory();
      if (!pInstance)
         // A constructor that can't satisfy its post should throw instead
         throw std::exception{};
      auto count = pInstance->GetAudioInCount();
      ChannelName map[3]{ ChannelNameEOL, ChannelNameEOL, ChannelNameEOL };
      MakeChannelMap(sequence, channel, map);
      // Give the plugin a chance to initialize
      if (!pInstance->ProcessInitialize(settings, sampleRate, map))
         throw std::exception{};
      instances.resize(ii);
   
      // Beware generators with zero in count
      if (genLength)
         count = nChannels;
   
      instances.push_back(move(pInstance));
 
      // Advance ii
      if (count == 0)
         // What? Can't make progress
         throw std::exception();
      ii += count;
   }
   return instances;
}

References ChannelNameEOL, factory, MakeChannelMap(), WideSampleSequence::NChannels(), anonymous_namespace{ClipSegmentTest.cpp}::sampleRate, and settings().

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