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use jack_sys as j;
use libc;
use std::{mem, slice};
use std::marker::PhantomData;
use Error;
use Frames;
use Port;
use PortFlags;
use PortSpec;
use ProcessScope;
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct RawMidi<'a> {
pub time: Frames,
pub bytes: &'a [u8],
}
impl<'a> Default for RawMidi<'a> {
fn default() -> Self {
RawMidi {
time: 0,
bytes: &[],
}
}
}
#[derive(Copy, Clone, Debug, Default)]
pub struct MidiIn;
#[derive(Copy, Clone, Debug, Default)]
pub struct MidiOut;
unsafe impl PortSpec for MidiIn {
fn jack_port_type(&self) -> &'static str {
j::RAW_MIDI_TYPE
}
fn jack_flags(&self) -> PortFlags {
PortFlags::IS_INPUT
}
fn jack_buffer_size(&self) -> libc::c_ulong {
0
}
}
impl Port<MidiIn> {
pub fn iter<'a>(&'a self, ps: &'a ProcessScope) -> MidiIter<'a> {
assert_eq!(self.client_ptr(), ps.client_ptr());
MidiIter {
buffer: unsafe { self.buffer(ps.n_frames()) },
index: 0,
_phantom: PhantomData,
}
}
}
#[derive(Debug, Clone)]
pub struct MidiIter<'a> {
buffer: *mut ::libc::c_void,
index: usize,
_phantom: PhantomData<&'a ()>,
}
impl<'a> MidiIter<'a> {
pub fn peek(&self) -> Option<RawMidi<'a>> {
self.absolute_nth(self.index as libc::uint32_t)
}
pub fn next_if<P>(&mut self, predicate: P) -> Option<RawMidi<'a>>
where
P: FnOnce(RawMidi) -> bool,
{
if self.peek().map(predicate).unwrap_or(false) {
self.next()
} else {
None
}
}
fn absolute_nth(&self, n: libc::uint32_t) -> Option<RawMidi<'a>> {
let mut ev: j::jack_midi_event_t = unsafe { mem::uninitialized() };
let res = unsafe { j::jack_midi_event_get(&mut ev, self.buffer, n) };
if res != 0 {
return None;
}
let bytes_slice: &[u8] = unsafe { slice::from_raw_parts(ev.buffer as *const u8, ev.size) };
Some(RawMidi {
time: ev.time,
bytes: bytes_slice,
})
}
fn absolute_len(&self) -> usize {
if self.buffer.is_null() {
return 0;
} else {
unsafe { j::jack_midi_get_event_count(self.buffer) as usize }
}
}
}
impl<'a> Iterator for MidiIter<'a> {
type Item = RawMidi<'a>;
fn next(&mut self) -> Option<Self::Item> {
let ret = self.peek();
self.index += 1;
ret
}
fn size_hint(&self) -> (usize, Option<usize>) {
let len = self.absolute_len() - self.index;
(len, Some(len))
}
fn count(self) -> usize {
self.absolute_len() - self.index
}
fn last(self) -> Option<Self::Item> {
let len = self.absolute_len() as libc::uint32_t;
if len == 0 || self.index >= len as usize {
None
} else {
self.absolute_nth(len - 1)
}
}
fn nth(&mut self, n: usize) -> Option<Self::Item> {
self.index += n;
self.next()
}
}
unsafe impl PortSpec for MidiOut {
fn jack_port_type(&self) -> &'static str {
j::RAW_MIDI_TYPE
}
fn jack_flags(&self) -> PortFlags {
PortFlags::IS_OUTPUT
}
fn jack_buffer_size(&self) -> libc::c_ulong {
0
}
}
impl Port<MidiOut> {
pub fn writer<'a>(&'a mut self, ps: &'a ProcessScope) -> MidiWriter<'a> {
assert_eq!(self.client_ptr(), ps.client_ptr());
let buffer = unsafe { self.buffer(ps.n_frames()) };
unsafe { j::jack_midi_clear_buffer(buffer) };
MidiWriter {
buffer: buffer,
_phantom: PhantomData,
}
}
}
#[derive(Debug)]
pub struct MidiWriter<'a> {
buffer: *mut ::libc::c_void,
_phantom: PhantomData<&'a ()>,
}
impl<'a> MidiWriter<'a> {
pub fn write(&mut self, message: &RawMidi) -> Result<(), Error> {
let ev = j::jack_midi_event_t {
time: message.time,
size: message.bytes.len(),
buffer: message.bytes.as_ptr() as *mut u8,
};
let res = unsafe { j::jack_midi_event_write(self.buffer, ev.time, ev.buffer, ev.size) };
match res {
0 => Ok(()),
_ => Err(Error::NotEnoughSpace),
}
}
pub fn lost_count(&self) -> usize {
let n = unsafe { j::jack_midi_get_lost_event_count(self.buffer) };
n as usize
}
pub fn max_event_size(&self) -> usize {
let n = unsafe { j::jack_midi_max_event_size(self.buffer) };
n as usize
}
}
#[cfg(test)]
mod test {
use super::*;
use ClientOptions;
use client::Client;
use client::ClosureProcessHandler;
use client::ProcessHandler;
use jack_enums::Control;
use primitive_types::Frames;
use std::{thread, time};
use std::iter::Iterator;
use std::sync::Mutex;
use std::sync::mpsc::channel;
fn open_test_client(name: &str) -> Client {
Client::new(name, ClientOptions::NO_START_SERVER).unwrap().0
}
struct Connector {
src: String,
dst: String,
}
impl Connector {
fn connect(&self, c: &Client) {
c.connect_ports_by_name(&self.src, &self.dst).unwrap();
}
}
#[derive(Clone, Debug, PartialEq, Eq)]
struct OwnedRawMidi {
time: Frames,
bytes: Vec<u8>,
}
impl OwnedRawMidi {
fn new(m: &RawMidi) -> OwnedRawMidi {
OwnedRawMidi {
time: m.time,
bytes: m.bytes.to_vec(),
}
}
fn unowned<'a>(&'a self) -> RawMidi<'a> {
RawMidi {
time: self.time,
bytes: &self.bytes,
}
}
}
struct IterTest<F: Send + Fn(MidiIter) -> Vec<OwnedRawMidi>> {
stream: Vec<OwnedRawMidi>,
collected: Vec<OwnedRawMidi>,
collector: F,
midi_in: Port<MidiIn>,
midi_out: Port<MidiOut>,
}
impl<F: Send + Fn(MidiIter) -> Vec<OwnedRawMidi>> IterTest<F> {
fn new(client: &Client, stream: Vec<OwnedRawMidi>, collector: F) -> IterTest<F> {
IterTest {
stream: stream,
collected: Vec::new(),
collector: collector,
midi_in: client.register_port("in", MidiIn::default()).unwrap(),
midi_out: client.register_port("out", MidiOut::default()).unwrap(),
}
}
fn connector(&self) -> Connector {
Connector {
src: self.midi_out.name().unwrap().to_string(),
dst: self.midi_in.name().unwrap().to_string(),
}
}
}
impl<F: Send + Fn(MidiIter) -> Vec<OwnedRawMidi>> ProcessHandler for IterTest<F> {
fn process(&mut self, _: &Client, ps: &ProcessScope) -> Control {
let (midi_in, mut midi_out) = (self.midi_in.iter(ps), self.midi_out.writer(ps));
for m in self.stream.iter() {
midi_out.write(&m.unowned()).unwrap();
}
if self.collected.is_empty() {
self.collected = (self.collector)(midi_in);
}
Control::Continue
}
}
#[test]
fn port_midi_can_read_write() {
let c = open_test_client("port_midi_crw");
let in_a = c.register_port("ia", MidiIn::default()).unwrap();
let in_b = c.register_port("ib", MidiIn::default()).unwrap();
let mut out_a = c.register_port("oa", MidiOut::default()).unwrap();
let mut out_b = c.register_port("ob", MidiOut::default()).unwrap();
let (signal_succeed, did_succeed) = channel();
let process_callback = move |_: &Client, ps: &ProcessScope| -> Control {
let exp_a = RawMidi {
time: 0,
bytes: &[0b10010000, 0b01000000],
};
let exp_b = RawMidi {
time: 64,
bytes: &[0b10000000, 0b01000000],
};
let in_a = in_a.iter(ps);
let in_b = in_b.iter(ps);
let mut out_a = out_a.writer(ps);
let mut out_b = out_b.writer(ps);
out_a.write(&exp_a).unwrap();
out_b.write(&exp_b).unwrap();
if in_a.clone().next().is_some() && in_a.clone().all(|m| m == exp_a)
&& in_b.clone().all(|m| m == exp_b)
{
let _ = signal_succeed.send(true).unwrap();
}
Control::Continue
};
let ac = c.activate_async((), ClosureProcessHandler::new(process_callback))
.unwrap();
ac.as_client()
.connect_ports_by_name("port_midi_crw:oa", "port_midi_crw:ia")
.unwrap();
ac.as_client()
.connect_ports_by_name("port_midi_crw:ob", "port_midi_crw:ib")
.unwrap();
thread::sleep(time::Duration::from_millis(400));
assert!(
did_succeed.iter().any(|b| b),
"input port does not have expected data"
);
ac.deactivate().unwrap();
}
lazy_static! {
static ref PMCGMES_MAX_EVENT_SIZE: Mutex<usize> = Mutex::new(0);
}
#[test]
fn port_midi_can_get_max_event_size() {
let c = open_test_client("port_midi_cglc");
let mut out_p = c.register_port("op", MidiOut::default()).unwrap();
let process_callback = move |_: &Client, ps: &ProcessScope| -> Control {
let out_p = out_p.writer(ps);
*PMCGMES_MAX_EVENT_SIZE.lock().unwrap() = out_p.max_event_size();
Control::Continue
};
let ac = c.activate_async((), ClosureProcessHandler::new(process_callback))
.unwrap();
assert!(*PMCGMES_MAX_EVENT_SIZE.lock().unwrap() > 0);
ac.deactivate().unwrap();
}
lazy_static! {
static ref PMCEMES_WRITE_RESULT: Mutex<Result<(), Error>> = Mutex::new(Ok(()));
}
#[test]
fn port_midi_cant_exceed_max_event_size() {
let c = open_test_client("port_midi_cglc");
let mut out_p = c.register_port("op", MidiOut::default()).unwrap();
let process_callback = move |_: &Client, ps: &ProcessScope| -> Control {
let mut out_p = out_p.writer(ps);
*PMCGMES_MAX_EVENT_SIZE.lock().unwrap() = out_p.max_event_size();
let bytes: Vec<u8> = (0..out_p.max_event_size() + 1).map(|_| 0).collect();
let msg = RawMidi {
time: 0,
bytes: &bytes,
};
*PMCEMES_WRITE_RESULT.lock().unwrap() = out_p.write(&msg);
Control::Continue
};
let ac = c.activate_async((), ClosureProcessHandler::new(process_callback))
.unwrap();
assert_eq!(
*PMCEMES_WRITE_RESULT.lock().unwrap(),
Err(Error::NotEnoughSpace)
);
ac.deactivate().unwrap();
}
lazy_static! {
static ref PMI_NEXT: Mutex<Option<(Frames, Vec<u8>)>> = Mutex::default();
static ref PMI_SIZE_HINT: Mutex<(usize, Option<usize>)> = Mutex::new((0, None));
static ref PMI_COUNT: Mutex<usize> = Mutex::default();
static ref PMI_LAST: Mutex<Option<(Frames, Vec<u8>)>> = Mutex::default();
static ref PMI_THIRD: Mutex<Option<(Frames, Vec<u8>)>> = Mutex::default();
}
#[test]
fn port_midi_iter() {
let c = open_test_client("port_midi_iter");
let in_p = c.register_port("ip", MidiIn::default()).unwrap();
let mut out_p = c.register_port("op", MidiOut::default()).unwrap();
let process_callback = move |_: &Client, ps: &ProcessScope| -> Control {
let in_p = in_p.iter(ps);
let mut out_p = out_p.writer(ps);
for i in 10..14 {
let msg = RawMidi {
time: i,
bytes: &[i as u8],
};
out_p.write(&msg).ok();
}
let rm_to_owned = |m: &RawMidi| (m.time, m.bytes.to_vec());
*PMI_NEXT.lock().unwrap() = in_p.clone().next().map(|m| rm_to_owned(&m));
*PMI_SIZE_HINT.lock().unwrap() = in_p.size_hint();
*PMI_COUNT.lock().unwrap() = in_p.clone().count();
*PMI_LAST.lock().unwrap() = in_p.clone().last().map(|m| rm_to_owned(&m));
*PMI_THIRD.lock().unwrap() = in_p.clone().nth(2).map(|m| rm_to_owned(&m));
Control::Continue
};
let ac = c.activate_async((), ClosureProcessHandler::new(process_callback))
.unwrap();
ac.as_client()
.connect_ports_by_name("port_midi_iter:op", "port_midi_iter:ip")
.unwrap();
thread::sleep(time::Duration::from_millis(200));
ac.deactivate().unwrap();
assert_eq!(*PMI_NEXT.lock().unwrap(), Some((10, [10].to_vec())));
assert_eq!(*PMI_SIZE_HINT.lock().unwrap(), (4, Some(4)));
assert_eq!(*PMI_COUNT.lock().unwrap(), 4);
assert_eq!(*PMI_LAST.lock().unwrap(), Some((13, [13].to_vec())));
assert_eq!(*PMI_THIRD.lock().unwrap(), Some((12, [12].to_vec())));
}
#[test]
fn port_midi_iter_next_if() {
let c = open_test_client("pmi_nib");
let stream = vec![
OwnedRawMidi {
time: 0,
bytes: vec![1],
},
OwnedRawMidi {
time: 10,
bytes: vec![3, 4, 5],
},
OwnedRawMidi {
time: 11,
bytes: vec![6],
},
OwnedRawMidi {
time: 12,
bytes: vec![7, 8],
},
];
let collect = |midi_in: MidiIter| {
let mut collected = Vec::with_capacity(midi_in.clone().count());
let mut iter = midi_in.clone();
while let Some(m) = iter.next_if(|m| m.time < 11) {
collected.push(OwnedRawMidi::new(&m));
}
collected
};
let processor = IterTest::new(&c, stream.clone(), collect);
let connector = processor.connector();
let ac = c.activate_async((), processor).unwrap();
connector.connect(ac.as_client());
thread::sleep(time::Duration::from_millis(200));
let (_, _, processor) = ac.deactivate().unwrap();
let expected: &[OwnedRawMidi] = &stream[0..2];
let got: &[OwnedRawMidi] = &processor.collected;
assert_eq!(expected, got);
}
}