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use audio_mixer::{Channel, Mixer};
use criterion::{black_box, criterion_group, criterion_main, Criterion};
use std::any::{Any, TypeId};
fn criterion_benchmark(c: &mut Criterion) {
let frames = 512;
c.bench_function("downmix_f32", |b| {
b.iter(|| downmix::<f32>(black_box(frames)))
});
c.bench_function("downmix_i16", |b| {
b.iter(|| downmix::<i16>(black_box(frames)))
});
c.bench_function("upmix_f32", |b| b.iter(|| upmix::<f32>(black_box(frames))));
c.bench_function("upmix_i16", |b| b.iter(|| upmix::<i16>(black_box(frames))));
}
fn downmix<T>(frames: usize)
where
T: Clone + Default + From<u8> + ?Sized + Any,
{
// Downmix from 5.1 to stereo.
let input_channels = [
Channel::FrontLeft,
Channel::FrontRight,
Channel::FrontCenter,
Channel::LowFrequency,
Channel::BackLeft,
Channel::BackRight,
];
let output_channels = [Channel::FrontLeft, Channel::FrontRight];
mix::<T>(&input_channels, &output_channels, frames);
}
fn upmix<T>(frames: usize)
where
T: Clone + Default + From<u8> + ?Sized + Any,
{
// upmix from mono to stereo.
let input_channels = [Channel::FrontCenter];
let output_channels = [Channel::FrontLeft, Channel::FrontRight];
mix::<T>(&input_channels, &output_channels, frames);
}
fn mix<T>(input_channels: &[Channel], output_channels: &[Channel], frames: usize)
where
T: Clone + Default + From<u8> + ?Sized + Any,
{
if TypeId::of::<T>() == TypeId::of::<f32>() {
let (input_buffer, mut output_buffer) = create_buffers::<f32>(
input_channels.len() * frames,
output_channels.len() * frames,
);
let mut in_buf = input_buffer.chunks(input_channels.len());
let mut out_buf = output_buffer.chunks_mut(output_channels.len());
let mixer = Mixer::<f32>::new(input_channels, output_channels);
for _ in 0..frames {
mixer.mix(in_buf.next().unwrap(), out_buf.next().unwrap());
}
} else if TypeId::of::<T>() == TypeId::of::<i16>() {
let (input_buffer, mut output_buffer) = create_buffers::<i16>(
input_channels.len() * frames,
output_channels.len() * frames,
);
let mut in_buf = input_buffer.chunks(input_channels.len());
let mut out_buf = output_buffer.chunks_mut(output_channels.len());
let mixer = Mixer::<i16>::new(input_channels, output_channels);
for _ in 0..frames {
mixer.mix(in_buf.next().unwrap(), out_buf.next().unwrap());
}
} else {
panic!("Unsupport type");
}
}
fn create_buffers<T: Clone + Default + From<u8>>(
input_size: usize,
output_size: usize,
) -> (Vec<T>, Vec<T>) {
let mut input_buffer = default_buffer::<T>(input_size);
for (i, data) in input_buffer.iter_mut().enumerate() {
*data = T::from((i + 1) as u8);
}
let output_buffer = default_buffer::<T>(output_size);
(input_buffer, output_buffer)
}
fn default_buffer<T: Clone + Default>(size: usize) -> Vec<T> {
let mut v = Vec::with_capacity(size);
v.resize(size, T::default());
v
}
criterion_group!(benches, criterion_benchmark);
criterion_main!(benches);
|
