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use crate::proc::{Procer, ProcerData, Update};
use crate::notes::{Note, NoteValue, ProcerNote};
use crate::outputers::{Outputer, Outputers, SimpleOutputer};
use crate::rfft::RFftProcer;
use realfft::FftNum;
use rustfft::num_traits::float::Float;
use alsa::{Direction, ValueOr};
use alsa::pcm::{PCM, HwParams, Format, Access, State};
use derive_more::Display;
use std::fmt::Debug;
use std::io::Write;
//use std::collections::VecDeque;
pub enum Procers<I: Default + Clone + FftNum + Float, const US: usize, const BS: usize> {
Rfft(RFftProcer<I, US, BS>),
// XXX: if i add a fir filter that doesn't need a buffer i think
// i can just spec it as Fir12Tet(Fir12TetProcer<I, US>) or similar
// here
}
#[derive(Display)]
#[display(fmt="StaticBuffer(rate={}, psize={}, channels={}, opsize={}, adev=(name={}), outdev=(name={:?}), cperiods={}, operiods={})", rate, period_size, channels, out_period_size, adev_name, outdev_name, capture_periods, output_periods)]
pub struct StaticBuffer<'nl, I: Default + Debug + Clone + FftNum + Float + NoteValue, const US: usize, const BS: usize> {
pub rate: u32,
pub period_size: usize,
pub channels: u32,
pub out_period_size: usize,
pub procers: Vec<(Procers<I, US, BS>, ProcerData<'nl, I>)>,
pub adev_name: String,
pub adev: PCM,
pub outdev_name: Option<String>,
pub outdev: Option<PCM>,
pub outputer: Outputers,
pub capture_periods: u32,
pub output_periods: u32,
}
impl<'nl, I: Default + Debug + Clone + FftNum + Float + From<i16> + NoteValue, const US: usize, const BS: usize> StaticBuffer<'nl, I, US, BS> {
pub fn new(rate: u32, channels: u32, procers: Vec<(Procers<I, US, BS>, ProcerData<'nl, I>)>, adev_name: String, outdev_name: Option<String>, outputer: Outputers) -> Self {
let mut adev = PCM::new(&adev_name, Direction::Capture, true).unwrap();
let mut capture_periods = 0;
{
let hwp = HwParams::any(&adev).unwrap();
hwp.set_channels(channels).unwrap();
//hwp.set_rate_resample(false);
hwp.set_rate(rate, ValueOr::Nearest).unwrap();
hwp.set_format(Format::s16()).unwrap();
hwp.set_access(Access::MMapInterleaved).unwrap();
hwp.set_period_size(US as i64, ValueOr::Nearest).unwrap();
hwp.set_periods(8, ValueOr::Nearest).unwrap();
// TODO: directly using the ALSA ring buffer and copying directly from it instead of
// going through the Update/VecDeque might be interesting in the future, i think it'd
// require changing the const sizes to runtime determined sizes though, so future
// changes to try~
adev.hw_params(&hwp).unwrap();
capture_periods = hwp.get_periods().unwrap();
println!("capture periods: {}", capture_periods);
}
let (outdev, out_period_size, output_periods) = match &outdev_name {
None => (None, 0, 0),
Some(od_name) => {
let mut outdev = PCM::new(&od_name, Direction::Playback, true).unwrap();
let mut output_periods = 0;
let mut out_period_size = 0;
{
let hwp = HwParams::any(&outdev).unwrap();
hwp.set_channels(channels).unwrap();
hwp.set_rate(rate, ValueOr::Nearest).unwrap();
hwp.set_format(Format::s16()).unwrap();
hwp.set_access(Access::RWInterleaved).unwrap();
//hwp.set_period_size(US as i64, ValueOr::Nearest).unwrap();
//hwp.set_periods(8, ValueOr::Nearest).unwrap();
outdev.hw_params(&hwp).unwrap();
output_periods = hwp.get_periods().unwrap();
out_period_size = hwp.get_period_size().unwrap() as usize;
println!("output periods: {}", output_periods);
}
(Some(outdev), out_period_size, output_periods)
}
};
return Self {
rate, procers, adev_name, adev, outdev_name, outdev,
period_size: US, out_period_size: out_period_size,
channels: channels,
outputer,
capture_periods, output_periods,
}
}
pub fn capture_loop(&mut self) {
let empty: Vec<i16> = vec![0i16; US * self.channels as usize];
//let mut line_str: String = format!("\r{:80}", "");
let in_io = self.adev.io_i16().unwrap();
let out_io_opt = {
match &self.outdev {
None => (None),
Some(outdev) => {
//self.adev.link(&outdev).unwrap();
let out_io = outdev.io_i16().unwrap();
// queue up an empty period in the outdev so we can sync between in and out devices
// with a 4 period latency
for _i in 0..std::cmp::min(4, self.output_periods/2) {
out_io.writei(&empty).unwrap();
}
outdev.start();//.unwrap();
println!("output available: {}", outdev.avail().unwrap());
Some(out_io)
}
}
};
self.adev.start();//.unwrap();
//let vt: I = I::from(112);
let conv_scale: I = <I as From<i16>>::from(i16::MAX);
println!("input available: {}", self.adev.avail_update().unwrap());
let mut latentframes = 0;
let mut unstarted = false;
loop {
/*println!("output available: {}", self.outdev.avail().unwrap());
println!("input available: {}", self.adev.avail_update().unwrap());*/
self.adev.wait(None).unwrap();
//println!("a");
// should be called right before mmap_begin according to:
// https://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m___direct.html#ga6d4acf42de554d4d1177fb035d484ea4
let avail_frames = self.adev.avail_update().unwrap();
in_io.mmap(US, |in_slice| {
let size = in_slice.len();
//println!("slice length: {}", size);
if size == 0 {
println!("warning: passed a 0-sized buffer from mmap\n");
return 0;
}
let stride = self.channels as usize;
if size != (US * stride) {
println!("warning: passed a {} sized buffer from mmap\n\n", size);
return 0;
}
assert_eq!(size, US * stride);
let (written, oa) = match &out_io_opt {
Some(out_io) => {
let wri = out_io.writei(&in_slice).unwrap();
assert_eq!(wri, (size/stride));
let oaa = self.outdev.as_ref().unwrap().avail().unwrap();
(wri, oaa)
}
None => (size/stride, 0i64),
};
let ia = self.adev.avail_update().unwrap();
let total_outbuf: i64 = oa - ia;
/*print!("\rtotal: {}, out: {}, in: {}", total_outbuf, oa, ia);
std::io::stdout().flush().unwrap();*/
//return written;
//let constrained_slice = in_slice[0..US*stride];
let mut update: Update<I, US> = [I::default(); US];
// copy over the left channel data (even indexes)
// TODO/XXX: see if this uses SIMD or needs optimizing :o
// using iter and map/function that does strides would prob also work well :o
// gotta scale this from i16::MAX to float, alsa
// seems to divide by i16::MAX, not sure if there's a better way to do this
for i in 0..US {
update[i] = <I as From<i16>>::from(in_slice[i*stride]) / conv_scale;
};
// hmm, i only need to use 1 procer here for displaying, not sure what to do with
// the rest :o
//for (procer, pdata) in self.procers { }
let (ref mut procer, ref mut pdata) = self.procers.first_mut().unwrap();
let mut processed = false;
{
let mut pnotes = pdata.pnotes.0.as_mut_slice();
//let processed = true;
processed = procer.process_data(&update, pnotes);
}
if processed {
self.outputer.handle_pnotes(&mut pdata.pnotes);
//let mut position = 1;
// TODO: maybe copy, inplace probably works for now though
/*pnotes.sort_unstable_by(|pn1, pn2| (-pn1.2).partial_cmp(&-pn2.2).unwrap());
print!("\r{:-80}", pdata.pnotes);
std::io::stdout().flush();*/
}
//let mut position = 0;
//let mut remaining = in_slice.len();
//let mut remain_frames = remaining/(self.channels as usize);
//let mut handled = false;
//self.outdev.wait(None).unwrap();
//println!("wrote {} frames", written);
/*while handled == false {
self.outdev.wait(None).unwrap();
out_io.mmap(remain_frames, |out_slice| {
let outlen = out_slice.len();
println!("out slice len: {}", out_slice.len());
if outlen == 0 {
return 0;
}
out_slice.clone_from_slice(&in_slice);
handled = true;
return out_slice.len()/(self.channels as usize);
}).unwrap();
}*/
/*if latentframes > 0 {
latentframes -= 1;
} else if unstarted {
unstarted = false;
println!("starting outdev");
self.outdev.start().unwrap();
}*/
return in_slice.len()/(self.channels as usize);
}).unwrap();
}
}
//fn new(
}
/*impl StaticBuffer<'nl, B> {
}*/
//impl<'nl, B> StaticBuffer<'nl, A> {
//pub fn fill_initial(&self,
//pub fn new(rate: usize, period_size: usize, out_period_size: usize, procers: Vec<(Procers<f64>, ProcerData<'nl>)>,
//}
impl<I: Default + Clone + FftNum + Float + NoteValue, const US: usize, const BS: usize> Procer<I, US> for Procers<I, US, BS> {
fn get_size(&self) -> usize {
match self {
Procers::Rfft(rfp) => rfp.get_size(),
}
}
fn get_frequency(&self) -> usize {
match self {
Procers::Rfft(rfp) => rfp.get_frequency(),
}
}
fn make_pnotes<'nl>(&self, notes: &'nl [Note]) -> Vec<ProcerNote<'nl, I>> {
match self {
Procers::Rfft(rfp) => rfp.make_pnotes(notes),
}
}
fn process_data(&mut self, input: &Update<I, US>, notes: &mut [ProcerNote<I>]) -> bool {
match self {
Procers::Rfft(rfp) => rfp.process_data(input, notes),
}
}
}
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