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Remove support for the non-SIMD Diopser version

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This commit is contained in:
Robbert van der Helm 2022-03-04 12:49:36 +01:00
parent 1083ee95b6
commit 7fd3c31a0f
4 changed files with 21 additions and 81 deletions
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3
plugins/diopser/Cargo.toml
View file

@ -10,7 +10,8 @@ crate-type = ["cdylib"]
[features]
default = ["simd"]
# Make it go fast, vroom. Requires a nightly compiler.
# Make it go fast, vroom. Requires a nightly compiler. Support for the non-SIMD
# version has been removed at the moment.
simd = ["nih_plug/simd"]
[dependencies]

12
plugins/diopser/README.md
View file

@ -34,17 +34,9 @@ on macOS.
### Building
After installing [Rust](https://rustup.rs/) with the nightly toolchain you can
compile Diopser as follows
After installing [Rust](https://rustup.rs/) with the nightly toolchain (because
of the use of SIMD), you can compile Diopser as follows
```shell
cargo +nightly xtask bundle gain --release
```
If you don't have access to a nightly compiler (`rustup default nightly && rustup update`),
then you can compile a version without SIMD at a 2x penalty by disabling the
SIMD feature:
```shell
cargo xtask bundle gain --release --no-default-features
```

3
plugins/diopser/src/filter.rs
View file

@ -16,8 +16,6 @@
use std::f32::consts;
use std::ops::{Add, Mul, Sub};
#[cfg(feature = "simd")]
use std::simd::f32x2;
/// A simple biquad filter with functions for generating coefficients for an all-pass filter.
@ -136,7 +134,6 @@ impl SimdType for f32 {
}
}
#[cfg(feature = "simd")]
impl SimdType for f32x2 {
fn from_f32(value: f32) -> Self {
f32x2::splat(value)

64
plugins/diopser/src/lib.rs
View file

@ -16,17 +16,18 @@
#![cfg_attr(feature = "simd", feature(portable_simd))]
#[cfg(not(feature = "simd"))]
compile_error!("Compiling without SIMD support is currently not supported");
#[macro_use]
extern crate nih_plug;
use nih_plug::prelude::*;
use std::pin::Pin;
use std::simd::f32x2;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Arc;
#[cfg(feature = "simd")]
use std::simd::f32x2;
mod filter;
/// How many all-pass filters we can have in series at most. The filter stages parameter determines
@ -54,10 +55,7 @@ struct Diopser {
/// All of the all-pass filters, with vectorized coefficients so they can be calculated for
/// multiple channels at once. [`DiopserParams::num_stages`] controls how many filters are
/// actually active.
#[cfg(feature = "simd")]
filters: [filter::Biquad<f32x2>; MAX_NUM_FILTERS],
#[cfg(not(feature = "simd"))]
filters: Vec<[filter::Biquad<f32>; MAX_NUM_FILTERS]>,
/// If this is set at the start of the processing cycle, then the filter coefficients should be
/// updated. For the regular filter parameters we can look at the smoothers, but this is needed
@ -118,10 +116,7 @@ impl Default for Diopser {
sample_rate: 1.0,
#[cfg(feature = "simd")]
filters: [filter::Biquad::default(); MAX_NUM_FILTERS],
#[cfg(not(feature = "simd"))]
filters: Vec::new(),
should_update_filters,
next_filter_smoothing_in: 1,
@ -227,17 +222,8 @@ impl Plugin for Diopser {
}
fn accepts_bus_config(&self, config: &BusConfig) -> bool {
// The scalar version can handle any channel config, while the SIMD version can only do
// stereo
#[cfg(feature = "simd")]
{
config.num_input_channels == config.num_output_channels
&& config.num_input_channels == 2
}
#[cfg(not(feature = "simd"))]
{
config.num_input_channels == config.num_output_channels && config.num_input_channels > 0
}
// The SIMD version only supports stereo
config.num_input_channels == config.num_output_channels && config.num_input_channels == 2
}
fn initialize(
@ -246,14 +232,6 @@ impl Plugin for Diopser {
buffer_config: &BufferConfig,
_context: &mut impl ProcessContext,
) -> bool {
#[cfg(not(feature = "simd"))]
{
self.filters = vec![
[Default::default(); MAX_NUM_FILTERS];
_bus_config.num_input_channels as usize
];
}
// Initialize the filters on the first process call
self.sample_rate = buffer_config.sample_rate;
self.should_update_filters.store(true, Ordering::Release);
@ -277,8 +255,6 @@ impl Plugin for Diopser {
// We can compute the filters for both channels at once. The SIMD version thus now only
// supports steroo audio.
#[cfg(feature = "simd")]
{
let mut samples = unsafe { channel_samples.to_simd_unchecked() };
for filter in self
@ -292,19 +268,6 @@ impl Plugin for Diopser {
unsafe { channel_samples.from_simd_unchecked(samples) };
}
#[cfg(not(feature = "simd"))]
// We get better cache locality by iterating over the filters and then over the channels
for filter_idx in 0..self.params.filter_stages.value as usize {
for (channel_idx, filters) in self.filters.iter_mut().enumerate() {
// We can also use `channel_samples.iter_mut()`, but the compiler isn't able to
// optmize that iterator away and it would add a ton of overhead over indexing
// the buffer directly
let sample = unsafe { channel_samples.get_unchecked_mut(channel_idx) };
*sample = filters[filter_idx].process(*sample);
}
}
}
ProcessStatus::Normal
}
}
@ -381,25 +344,12 @@ impl Diopser {
}
.clamp(MIN_FREQUENCY, max_frequency);
let coefficients =
self.filters[filter_idx].coefficients =
filter::BiquadCoefficients::allpass(self.sample_rate, filter_frequency, resonance);
#[cfg(feature = "simd")]
{
self.filters[filter_idx].coefficients = coefficients;
if reset_filters {
self.filters[filter_idx].reset();
}
}
#[cfg(not(feature = "simd"))]
for channel in self.filters.iter_mut() {
channel[filter_idx].coefficients = coefficients;
if reset_filters {
channel[filter_idx].reset();
}
}
}
}
}