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use std::marker::PhantomData;
use std::sync::Arc;
pub use vst;
use vst::plugin::PluginParameters;
use vst::{
buffer::AudioBuffer as VSTAudioBuffer,
plugin::{HostCallback, Info},
};
use audio_processor_traits::{
audio_buffer::OwnedAudioBuffer, AudioBuffer, AudioProcessor, AudioProcessorSettings,
VecAudioBuffer,
};
use crate::{StandaloneAudioOnlyProcessor, StandaloneProcessor, StandaloneProcessorImpl};
pub struct StandalonePluginContext {}
pub trait StandaloneProcessorFactory {
type Output;
fn new_for_host(context: StandalonePluginContext) -> Self::Output;
}
impl<D: Default> StandaloneProcessorFactory for D {
type Output = Self;
fn new_for_host(_context: StandalonePluginContext) -> Self {
Self::default()
}
}
impl<P> StandaloneProcessorFactory for StandaloneProcessorImpl<P>
where
P: StandaloneProcessorFactory<Output = P> + AudioProcessor<SampleType = f32>,
{
type Output = Self;
fn new_for_host(context: StandalonePluginContext) -> Self::Output {
StandaloneProcessorImpl::new(P::new_for_host(context))
}
}
impl<P> StandaloneProcessorFactory for StandaloneAudioOnlyProcessor<P>
where
P: StandaloneProcessorFactory<Output = P> + AudioProcessor<SampleType = f32>,
{
type Output = Self;
fn new_for_host(context: StandalonePluginContext) -> Self {
StandaloneAudioOnlyProcessor::new(P::new_for_host(context), Default::default())
}
}
pub struct StandaloneVSTPlugin<SPF, SP> {
processor: SP,
buffer: VecAudioBuffer<f32>,
settings: AudioProcessorSettings,
factory: PhantomData<SPF>,
}
#[macro_export]
macro_rules! standalone_vst {
($t:ty) => {
::audio_processor_standalone::standalone_vst::vst::plugin_main!(
::audio_processor_standalone::standalone_vst::StandaloneVSTPlugin<
::audio_processor_standalone::standalone_processor::StandaloneAudioOnlyProcessor<
$t,
>,
::audio_processor_standalone::standalone_processor::StandaloneAudioOnlyProcessor<
$t,
>,
>
);
};
($t:ty, $f: ty) => {
::audio_processor_standalone::standalone_vst::vst::plugin_main!(
::audio_processor_standalone::standalone_vst::StandaloneVSTPlugin<
$f,
::audio_processor_standalone::standalone_processor::StandaloneAudioOnlyProcessor<
$t,
>,
>
);
};
}
#[macro_export]
macro_rules! generic_standalone_vst {
($t: ty) => {
struct StandaloneFactory {}
impl ::audio_processor_standalone::standalone_vst::StandaloneProcessorFactory for StandaloneFactory {
type Output = ::audio_processor_standalone::standalone_processor::StandaloneAudioOnlyProcessor<$t>;
fn new_for_host(
_context: ::audio_processor_standalone::standalone_vst::StandalonePluginContext
) -> Self::Output {
let processor = <$t>::default();
let options = ::audio_processor_standalone::standalone_processor::StandaloneOptions {
handle: Some(::audio_processor_traits::parameters::AudioProcessorHandleProvider::generic_handle(&processor)),
..Default::default()
};
::audio_processor_standalone::standalone_processor::StandaloneAudioOnlyProcessor::new(processor, options)
}
}
::audio_processor_standalone::standalone_vst!($t, StandaloneFactory);
}
}
impl<ProcessorFactory, Processor> vst::plugin::Plugin
for StandaloneVSTPlugin<ProcessorFactory, Processor>
where
ProcessorFactory: StandaloneProcessorFactory<Output = Processor> + Send,
Processor: StandaloneProcessor,
<Processor as StandaloneProcessor>::Processor: AudioProcessor<SampleType = f32>,
{
fn get_info(&self) -> Info {
Info { ..Info::default() }
}
fn new(_host: HostCallback) -> Self
where
Self: Sized,
{
Self {
processor: ProcessorFactory::new_for_host(StandalonePluginContext {}),
buffer: VecAudioBuffer::new(),
settings: AudioProcessorSettings::default(),
factory: PhantomData::default(),
}
}
fn set_sample_rate(&mut self, rate: f32) {
self.settings.sample_rate = rate;
self.processor.processor().prepare(self.settings);
}
fn set_block_size(&mut self, size: i64) {
self.buffer.resize(2, size as usize, 0.0);
self.settings.block_size = size as usize;
self.processor.processor().prepare(self.settings);
}
fn resume(&mut self) {
self.processor.processor().prepare(self.settings);
}
fn process(&mut self, buffer: &mut VSTAudioBuffer<f32>) {
let num_samples = buffer.samples();
let (inputs, mut outputs) = buffer.split();
self.buffer.resize(2, num_samples as usize, 0.0);
{
let buffer_slice = self.buffer.slice_mut();
for (channel, input) in inputs.into_iter().take(2).enumerate() {
for (index, sample) in input.iter().enumerate() {
buffer_slice[index * 2 + channel] = *sample;
}
}
}
self.processor.processor().process(&mut self.buffer);
{
let buffer_slice = self.buffer.slice();
for (channel, output) in outputs.into_iter().take(2).enumerate() {
for (index, sample) in output.iter_mut().enumerate() {
*sample = buffer_slice[index * 2 + channel];
}
}
}
}
fn get_parameter_object(&mut self) -> Arc<dyn PluginParameters> {
Arc::new(DummyPluginParameters)
}
#[cfg(feature = "gui")]
fn get_editor(&mut self) -> Option<Box<dyn vst::editor::Editor>> {
self.processor
.handle()
.map(|handle| crate::gui::editor(handle))
}
}
struct DummyPluginParameters;
impl PluginParameters for DummyPluginParameters {}