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use jack_sys as j;
use std::slice;
use crate::{Port, PortFlags, PortSpec, ProcessScope};
#[derive(Copy, Clone, Debug, Default)]
pub struct AudioIn;
#[derive(Copy, Clone, Debug, Default)]
pub struct AudioOut;
unsafe impl PortSpec for AudioOut {
fn jack_port_type(&self) -> &'static str {
j::FLOAT_MONO_AUDIO
}
fn jack_flags(&self) -> PortFlags {
PortFlags::IS_OUTPUT
}
fn jack_buffer_size(&self) -> libc::c_ulong {
0
}
}
unsafe impl PortSpec for AudioIn {
fn jack_port_type(&self) -> &'static str {
j::FLOAT_MONO_AUDIO
}
fn jack_flags(&self) -> PortFlags {
PortFlags::IS_INPUT
}
fn jack_buffer_size(&self) -> libc::c_ulong {
0
}
}
impl Port<AudioIn> {
pub fn as_slice<'a>(&'a self, ps: &'a ProcessScope) -> &'a [f32] {
assert_eq!(self.client_ptr(), ps.client_ptr());
unsafe {
slice::from_raw_parts(
self.buffer(ps.n_frames()) as *const f32,
ps.n_frames() as usize,
)
}
}
}
impl Port<AudioOut> {
pub fn as_mut_slice<'a>(&'a mut self, ps: &'a ProcessScope) -> &'a mut [f32] {
assert_eq!(self.client_ptr(), ps.client_ptr());
unsafe {
slice::from_raw_parts_mut(
self.buffer(ps.n_frames()) as *mut f32,
ps.n_frames() as usize,
)
}
}
}
#[cfg(test)]
mod test {
use crossbeam_channel::bounded;
use super::*;
use crate::{Client, ClientOptions, ClosureProcessHandler, Control};
fn open_test_client(name: &str) -> Client {
Client::new(name, ClientOptions::NO_START_SERVER).unwrap().0
}
#[test]
fn port_audio_can_read_write() {
let c = open_test_client("port_audio_crw");
let in_a = c.register_port("ia", AudioIn::default()).unwrap();
let in_b = c.register_port("ib", AudioIn::default()).unwrap();
let mut out_a = c.register_port("oa", AudioOut::default()).unwrap();
let mut out_b = c.register_port("ob", AudioOut::default()).unwrap();
let (signal_succeed, did_succeed) = bounded(1_000);
let process_callback = move |_: &Client, ps: &ProcessScope| -> Control {
let exp_a = 0.312_443;
let exp_b = -0.612_120;
let in_a = in_a.as_slice(ps);
let in_b = in_b.as_slice(ps);
let out_a = out_a.as_mut_slice(ps);
let out_b = out_b.as_mut_slice(ps);
for v in out_a.iter_mut() {
*v = exp_a;
}
for v in out_b.iter_mut() {
*v = exp_b;
}
if in_a.iter().all(|v| (*v - exp_a).abs() < 1E-5)
&& in_b.iter().all(|v| (*v - exp_b).abs() < 1E-5)
{
let s = signal_succeed.clone();
let _ = s.send(true);
}
Control::Continue
};
let ac = c
.activate_async((), ClosureProcessHandler::new(process_callback))
.unwrap();
ac.as_client()
.connect_ports_by_name("port_audio_crw:oa", "port_audio_crw:ia")
.unwrap();
ac.as_client()
.connect_ports_by_name("port_audio_crw:ob", "port_audio_crw:ib")
.unwrap();
assert!(
did_succeed.iter().any(|b| b),
"input port does not have expected data"
);
ac.deactivate().unwrap();
}
}