50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
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use anyhow::{Context, Result};
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use cpal::Sample;
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use tracing::{error, info, trace, warn};
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use tokio::sync::mpsc::{Receiver, Sender};
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use tokio::sync::mpsc::error::TryRecvError;
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use crate::task_msg::{RawEthFrameMessage, PcmSampleMessage};
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use crate::dsp_common::carrier::{Carrier, TwoStateCarrier};
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pub async fn dsp_outb_main(
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tx_for_wire: Sender<PcmSampleMessage>,
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mut rx_for_mod: Receiver<RawEthFrameMessage>,
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) -> Result<()> {
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trace!("pcm_outb task started");
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let carrier_phase = 0_f64;
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let carrier_low = 2400;
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let carrier_high = 2500;
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let mut carrier = TwoStateCarrier::new(carrier_low, carrier_high, 384000);
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loop {
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let eth_frame = match rx_for_mod.try_recv() {
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Ok(x) => x,
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Err(TryRecvError::Empty) => {
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tx_for_wire.send(i64::EQUILIBRIUM).await?;
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continue;
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}
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Err(TryRecvError::Disconnected) => {
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Err(anyhow::Error::msg(
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format!("rx_for_mod closed?! the tap task likely crashed"),
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))?
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}
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};
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for byte in eth_frame {
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for samp in carrier.byte_into_fsk_samples(&byte).iter() {
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tx_for_wire.send(*samp).await?;
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}
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}
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println!("done with that");
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// TODO: fetch real sample rate
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//(*carrier_phase * TAU * freq / sample_rate).sin()
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}
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}
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