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use crate::bufferpool::*;
use crate::flow::*;
use crate::flt;
use crate::numbers::*;
use crate::samples::*;
use tokio::sync::watch;
use tokio::task::spawn;
pub struct FmMod<Flt> {
receiver_connector: ReceiverConnector<Samples<Complex<Flt>>>,
sender_connector: SenderConnector<Samples<Complex<Flt>>>,
deviation: watch::Sender<f64>,
}
impl<Flt> Consumer<Samples<Complex<Flt>>> for FmMod<Flt> {
fn receiver_connector(&self) -> &ReceiverConnector<Samples<Complex<Flt>>> {
&self.receiver_connector
}
}
impl<Flt> Producer<Samples<Complex<Flt>>> for FmMod<Flt> {
fn sender_connector(&self) -> &SenderConnector<Samples<Complex<Flt>>> {
&self.sender_connector
}
}
impl<Flt> FmMod<Flt>
where
Flt: Float,
{
pub fn new(mut deviation: f64) -> Self {
use std::f64::consts::TAU;
let (mut receiver, receiver_connector) = new_receiver::<Samples<Complex<Flt>>>();
let (sender, sender_connector) = new_sender::<Samples<Complex<Flt>>>();
let (deviation_send, mut deviation_recv) = watch::channel(deviation);
let mut buf_pool = ChunkBufPool::<Complex<Flt>>::new();
let mut current_phase: Flt = Flt::zero();
spawn(async move {
loop {
match receiver.recv().await {
Ok(Samples {
sample_rate,
chunk: input_chunk,
}) => {
if deviation_recv.has_changed().unwrap_or(false) {
deviation = deviation_recv.borrow_and_update().clone();
}
let factor: Flt = flt!(deviation / sample_rate * TAU);
let mut output_chunk = buf_pool.get_with_capacity(input_chunk.len());
for &sample in input_chunk.iter() {
current_phase += sample.re * factor;
current_phase %= Flt::TAU();
let (im, re) = current_phase.sin_cos();
output_chunk.push(Complex::<Flt>::new(re, im));
}
if let Err(_) = sender
.send(Samples {
sample_rate,
chunk: output_chunk.finalize(),
})
.await
{
return;
}
}
Err(err) => {
if let Err(_) = sender.forward_error(err).await {
return;
}
if err == RecvError::Closed {
return;
}
}
}
}
});
Self {
receiver_connector,
sender_connector,
deviation: deviation_send,
}
}
pub fn deviation(&self) -> f64 {
self.deviation.borrow().clone()
}
pub fn set_deviation(&self, deviation: f64) -> &Self {
self.deviation.send_replace(deviation);
self
}
}
pub struct FmDemod<Flt> {
receiver_connector: ReceiverConnector<Samples<Complex<Flt>>>,
sender_connector: SenderConnector<Samples<Complex<Flt>>>,
deviation: watch::Sender<f64>,
}
impl<Flt> Consumer<Samples<Complex<Flt>>> for FmDemod<Flt> {
fn receiver_connector(&self) -> &ReceiverConnector<Samples<Complex<Flt>>> {
&self.receiver_connector
}
}
impl<Flt> Producer<Samples<Complex<Flt>>> for FmDemod<Flt> {
fn sender_connector(&self) -> &SenderConnector<Samples<Complex<Flt>>> {
&self.sender_connector
}
}
impl<Flt> FmDemod<Flt>
where
Flt: Float,
{
pub fn new(mut deviation: f64) -> Self {
use std::f64::consts::TAU;
let (mut receiver, receiver_connector) = new_receiver::<Samples<Complex<Flt>>>();
let (sender, sender_connector) = new_sender::<Samples<Complex<Flt>>>();
let (deviation_send, mut deviation_recv) = watch::channel(deviation);
let mut buf_pool = ChunkBufPool::<Complex<Flt>>::new();
let mut previous_sample: Option<Complex<Flt>> = None;
let mut output_sample = Complex::<Flt>::from(Flt::zero());
spawn(async move {
loop {
match receiver.recv().await {
Ok(Samples {
sample_rate,
chunk: input_chunk,
}) => {
if deviation_recv.has_changed().unwrap_or(false) {
deviation = deviation_recv.borrow_and_update().clone();
}
let factor: Flt = flt!(sample_rate / deviation / TAU);
let mut output_chunk = buf_pool.get_with_capacity(input_chunk.len());
for &sample in input_chunk.iter() {
if let Some(previous_sample) = previous_sample {
output_sample = Complex::<Flt>::from(
(sample * previous_sample.conj()).arg() * factor,
)
};
output_chunk.push(output_sample);
previous_sample = Some(sample);
}
if let Err(_) = sender
.send(Samples {
sample_rate,
chunk: output_chunk.finalize(),
})
.await
{
return;
}
}
Err(err) => {
previous_sample = None;
if let Err(_) = sender.forward_error(err).await {
return;
}
if err == RecvError::Closed {
return;
}
}
}
}
});
Self {
receiver_connector,
sender_connector,
deviation: deviation_send,
}
}
pub fn deviation(&self) -> f64 {
self.deviation.borrow().clone()
}
pub fn set_deviation(&self, deviation: f64) -> &Self {
self.deviation.send_replace(deviation);
self
}
}
#[cfg(test)]
mod tests {}