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Completely reword the audio IO layout system

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Instead of a VST3-style polling function to test if a plugin supports a
certain layout, the plugin now explicitly enumerates the supported
layouts. This aligns better with non-VST3 plugin formats.
This commit is contained in:
Robbert van der Helm
2023-02-20 16:57:32 +01:00
parent 36c48157db
commit e8fd18ab80
32 changed files with 972 additions and 838 deletions
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29
plugins/examples/gain/src/lib.rs
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@@ -120,11 +120,27 @@ impl Plugin for Gain {
const VERSION: &'static str = env!("CARGO_PKG_VERSION");
const DEFAULT_INPUT_CHANNELS: u32 = 2;
const DEFAULT_OUTPUT_CHANNELS: u32 = 2;
// The first audio IO layout is used as the default. The other layouts may be selected either
// explicitly or automatically by the host or the user depending on the plugin API/backend.
const AUDIO_IO_LAYOUTS: &'static [AudioIOLayout] = &[
AudioIOLayout {
main_input_channels: NonZeroU32::new(2),
main_output_channels: NonZeroU32::new(2),
const DEFAULT_AUX_INPUTS: Option<AuxiliaryIOConfig> = None;
const DEFAULT_AUX_OUTPUTS: Option<AuxiliaryIOConfig> = None;
aux_input_ports: &[],
aux_output_ports: &[],
// Individual ports and the layout as a whole can be named here. By default these names
// are generated as needed. This layout will be called 'Stereo', while the other one is
// given the name 'Mono' based no the number of input and output channels.
names: PortNames::const_default(),
},
AudioIOLayout {
main_input_channels: NonZeroU32::new(1),
main_output_channels: NonZeroU32::new(1),
..AudioIOLayout::const_default()
},
];
const MIDI_INPUT: MidiConfig = MidiConfig::None;
// Setting this to `true` will tell the wrapper to split the buffer up into smaller blocks
@@ -147,11 +163,6 @@ impl Plugin for Gain {
self.params.clone()
}
fn accepts_bus_config(&self, config: &BusConfig) -> bool {
// This works with any symmetrical IO layout
config.num_input_channels == config.num_output_channels && config.num_input_channels > 0
}
// This plugin doesn't need any special initialization, but if you need to do anything expensive
// then this would be the place. State is kept around when the host reconfigures the
// plugin. If we do need special initialization, we could implement the `initialize()` and/or