Module plugin 

Core plugin trait definitions.

This module defines the two-phase plugin lifecycle:

• Descriptor (unprepared state): Holds parameters, created before audio config is known. Transforms into a processor via Descriptor::prepare() when configuration arrives.

• Processor (prepared state): Ready for audio processing with real sample rate and buffer configuration. Created by Descriptor::prepare(), can return to unprepared state via Processor::unprepare() for sample rate changes.

This design eliminates placeholder values by making it impossible to process audio until proper configuration is available.

Structs

AuxInputCount

Number of auxiliary input buses.

AuxOutputCount

Number of auxiliary output buses.

BusInfo

Information about an audio bus.

BusLayout

Bus layout information for plugins that need channel configuration.

HostSetup

Internal: All information the host provides at initialization.

MainInputChannels

Number of channels on the main input bus.

MainOutputChannels

Number of channels on the main output bus.

MaxBufferSize

Maximum buffer size in samples.

Midi1Assignment

MIDI 1.0 CC assignment.

Midi2Assignment

MIDI 2.0 controller assignment.

MidiControllerAssignment

Base assignment info for MIDI controller → parameter mapping.

SampleRate

Sample rate in Hz.

Enums

BusType

Audio bus type.

ProcessMode

Processing mode (realtime vs offline).

Traits

Descriptor

The unprepared plugin definition - holds parameters before audio config is known.

HasParameters

Trait for types that hold parameters.

PluginSetup

Trait for plugin setup requirements.

Processor

The prepared processor - ready for audio processing.