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use crate::buf::{Buf, BufMut};
use crate::channel::{Channel, ChannelMut};
use crate::sample::Sample;
pub fn interleaved<T>(value: T, channels: usize) -> Interleaved<T> {
Interleaved { value, channels }
}
pub fn sequential<T>(value: T, frames: usize) -> Sequential<T> {
Sequential { value, frames }
}
pub struct Interleaved<T> {
value: T,
channels: usize,
}
impl<T, S> Buf<S> for Interleaved<T>
where
T: AsRef<[S]>,
S: Sample,
{
fn frames(&self) -> usize {
self.value.as_ref().len() / self.channels
}
fn channels(&self) -> usize {
self.channels
}
fn channel(&self, channel: usize) -> Channel<'_, S> {
if self.channels == 1 && channel == 0 {
Channel::linear(self.value.as_ref())
} else {
Channel::interleaved(self.value.as_ref(), self.channels, channel)
}
}
}
impl<T, S> BufMut<S> for Interleaved<T>
where
T: AsRef<[S]> + AsMut<[S]>,
S: Sample,
{
fn channel_mut(&mut self, channel: usize) -> ChannelMut<'_, S> {
if self.channels == 1 && channel == 0 {
ChannelMut::linear(self.value.as_mut())
} else {
ChannelMut::interleaved(self.value.as_mut(), self.channels, channel)
}
}
fn resize(&mut self, frames: usize) {
if self.value.as_ref().len() / self.channels != frames {
panic!("buffer cannot be resized")
}
}
fn resize_topology(&mut self, channels: usize, frames: usize) {
if self.channels != channels || self.value.as_ref().len() / self.channels != frames {
panic!("buffer cannot be resized")
}
}
}
pub struct Sequential<T> {
value: T,
frames: usize,
}
impl<T, S> Buf<S> for Sequential<T>
where
T: AsRef<[S]>,
S: Sample,
{
fn frames(&self) -> usize {
self.frames
}
fn channels(&self) -> usize {
self.value.as_ref().len() / self.frames
}
fn channel(&self, channel: usize) -> Channel<'_, S> {
let value = self.value.as_ref();
let value = &value[channel * self.frames..];
let value = &value[..self.frames];
Channel::linear(value)
}
}
impl<T, S> BufMut<S> for Sequential<T>
where
T: AsRef<[S]> + AsMut<[S]>,
S: Sample,
{
fn channel_mut(&mut self, channel: usize) -> ChannelMut<'_, S> {
let value = self.value.as_mut();
let value = &mut value[channel * self.frames..];
let value = &mut value[..self.frames];
ChannelMut::linear(value)
}
fn resize(&mut self, frames: usize) {
if self.frames != frames {
panic!("buffer cannot be resized")
}
}
fn resize_topology(&mut self, channels: usize, frames: usize) {
if self.frames != frames || self.value.as_ref().len() / self.frames != channels {
panic!("buffer cannot be resized")
}
}
}