行号示例

代码来自VST 3 Developer Portal

#include "pluginterfaces/vst/ivstparameterchanges.h"
#include "public.sdk/source/vst/vstaudioprocessoralgo.h"

//----------------------------------------------------------------------------
tresult PLUGIN_API PlugProcessor::process (Vst::ProcessData&data)
{
    //--- First: Read inputs parameter changes-----------
    if (data.inputParameterChanges)
    {
        // for each parameter defined by its ID
        int32 numParamsChanged = data.inputParameterChanges->getParameterCount ();
        for (int32 index = 0; index < numParamsChanged; index++)
        {
            // for this parameter we could iterate the list of value changes (could 1 per audio block or more!)
            // in this example, we get only the last value (getPointCount - 1)
            Vst::IParamValueQueue* paramQueue = data.inputParameterChanges->getParameterData (index);
            if (paramQueue)
            {
                Vst::ParamValue value;
                int32 sampleOffset;
                int32 numPoints = paramQueue->getPointCount ();
                switch (paramQueue->getParameterId ())
                {
                    case GainParams::kParamGainId:
                        if (paramQueue->getPoint (numPoints - 1, sampleOffset, value) == kResultTrue)
                            mGain = value;
                        break;
                }
            }
        }
    }
    // ....
}