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Revised multibus API and added support for multibus hosting

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This commit is contained in:
hogliux 2016-09-16 17:06:19 +01:00
parent ebf19aa61a
commit 4fa0516f40
140 changed files with 6836 additions and 4478 deletions
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48
examples/PlugInSamples/NoiseGate/Source/NoiseGate.cpp
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@ -28,50 +28,25 @@
class NoiseGate : public AudioProcessor
{
public:
//==============================================================================
//==============================================================================
NoiseGate()
: AudioProcessor (BusesProperties().withInput ("Input", AudioChannelSet::stereo())
.withOutput ("Output", AudioChannelSet::stereo())
.withInput ("Sidechain", AudioChannelSet::mono()))
{
addParameter (threshold = new AudioParameterFloat ("threshold", "Threshold", 0.0f, 1.0f, 0.5f));
addParameter (alpha = new AudioParameterFloat ("alpha", "Alpha", 0.0f, 1.0f, 0.8f));
// add single side-chain bus
busArrangement.inputBuses.add (AudioProcessorBus ("Sidechain In", AudioChannelSet::mono()));
// To be compatible with all VST2 DAWs, it's best to pass through the sidechain
if (isVST2())
busArrangement.outputBuses.add (AudioProcessorBus ("Sidechain Out", AudioChannelSet::mono()));
}
~NoiseGate() {}
//==============================================================================
bool setPreferredBusArrangement (bool isInputBus, int busIndex, const AudioChannelSet& preferred) override
bool isBusesLayoutSupported (const BusesLayout& layouts) const override
{
const bool isMainBus = (busIndex == 0);
const bool isSideChain = (busIndex == 1);
const int numChannels = preferred.size();
// do not allow disabling channels on main bus
if (numChannels == 0 && isMainBus) return false;
// VST2 does not natively support sidechains/aux buses.
// But many DAWs treat the third input of a plug-in
// as a sidechain. So limit the main bus to stereo!
if (isVST2())
{
if (isMainBus && numChannels != 2) return false;
// we only allow mono sidechains in VST-2
if (isSideChain && numChannels != 1)
return false;
}
// always have the same channel layout on both input and output on the main bus
if (isMainBus && ! AudioProcessor::setPreferredBusArrangement (! isInputBus, busIndex, preferred))
return false;
return AudioProcessor::setPreferredBusArrangement (isInputBus, busIndex, preferred);
// the sidechain can take any layout, the main bus needs to be the same on the input and output
return (layouts.getMainInputChannelSet() == layouts.getMainOutputChannelSet() &&
(! layouts.getMainInputChannelSet().isDisabled()));
}
//==============================================================================
@ -80,8 +55,8 @@ public:
void processBlock (AudioSampleBuffer& buffer, MidiBuffer&) override
{
AudioSampleBuffer mainInputOutput = busArrangement.getBusBuffer (buffer, true, 0);
AudioSampleBuffer sideChainInput = busArrangement.getBusBuffer (buffer, true, 1);
AudioSampleBuffer mainInputOutput = getBusBuffer(buffer, true, 0);
AudioSampleBuffer sideChainInput = getBusBuffer(buffer, true, 1);
float alphaCopy = *alpha;
float thresholdCopy = *threshold;
@ -105,9 +80,6 @@ public:
if (sampleCountDown > 0)
--sampleCountDown;
}
// VST-2 passes this through so clear the audio in this channel
sideChainInput.clear();
}
//==============================================================================