VST 3 Interfaces
VST 3.7
SDK for developing VST plugin

Queue of changes for a specific parameter: Vst::IParamValueQueue. More...
#include <ivstparameterchanges.h>
Public Member Functions  
virtual ParamID  getParameterId ()=0 
Returns its associated ID. More...  
virtual int32  getPointCount ()=0 
Returns count of points in the queue. More...  
virtual tresult  getPoint (int32 index, int32 &sampleOffset, ParamValue &value)=0 
Gets the value and offset at a given index. More...  
virtual tresult  addPoint (int32 sampleOffset, ParamValue value, int32 &index)=0 
Adds a new value at the end of the queue, its index is returned. More...  
Public Member Functions inherited from FUnknown  
virtual tresult  queryInterface (const TUID _iid, void **obj)=0 
virtual uint32  addRef ()=0 
virtual uint32  release ()=0 
Static Public Attributes  
static const FUID  iid 
Static Public Attributes inherited from FUnknown  
static const FUID  iid 
Queue of changes for a specific parameter: Vst::IParamValueQueue.
The change queue can be interpreted as segment of an automation curve. For each processing block, a segment with the size of the block is transmitted to the processor. The curve is expressed as sampling points of a linear approximation of the original automation curve. If the original already is a linear curve, it can be transmitted precisely. A nonlinear curve has to be converted to a linear approximation by the host. Every point of the value queue defines a linear section of the curve as a straight line from the previous point of a block to the new one. So the plugin can calculate the value of the curve for any sample position in the block.
Implicit Points:
In each processing block, the section of the curve for each parameter is transmitted. In order to reduce the amount of points, the point at block position 0 can be omitted.
Jumps:
A jump in the automation curve has to be transmitted as two points: one with the old value and one with the new value at the next sample position.

pure virtual 
Returns its associated ID.
Implemented in ParamChanges, and ParameterValueQueue.

pure virtual 
Returns count of points in the queue.
Implemented in ParamChanges, and ParameterValueQueue.

pure virtual 
Gets the value and offset at a given index.
Implemented in ParameterValueQueue, and ParamChanges.

pure virtual 
Adds a new value at the end of the queue, its index is returned.
Implemented in ParamChanges, and ParameterValueQueue.

static 