Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 211 insertions, 0 deletions

diff --git a/third_party/rust/alsa/src/rawmidi.rs b/third_party/rust/alsa/src/rawmidi.rs
new file mode 100644
index 0000000000..50ef9ccb3b
--- /dev/null
+++ b/third_party/rust/alsa/src/rawmidi.rs
@@ -0,0 +1,211 @@
+//! MIDI devices I/O and enumeration
+
+use libc::{c_int, c_uint, c_void, size_t, c_short, pollfd};
+use super::ctl_int::{ctl_ptr, Ctl};
+use super::{Direction, poll};
+use super::error::*;
+use crate::alsa;
+use std::{ptr, io};
+use std::ffi::{CStr, CString};
+
+/// Iterator over [Rawmidi](http://www.alsa-project.org/alsa-doc/alsa-lib/group___raw_midi.html) devices and subdevices
+pub struct Iter<'a> {
+    ctl: &'a Ctl,
+    device: c_int,
+    in_count: i32,
+    out_count: i32,
+    current: i32,
+}
+
+/// [snd_rawmidi_info_t](http://www.alsa-project.org/alsa-doc/alsa-lib/group___raw_midi.html) wrapper
+pub struct Info(*mut alsa::snd_rawmidi_info_t);
+
+impl Drop for Info {
+    fn drop(&mut self) { unsafe { alsa::snd_rawmidi_info_free(self.0) }; }
+}
+
+impl Info {
+    fn new() -> Result<Info> {
+        let mut p = ptr::null_mut();
+        acheck!(snd_rawmidi_info_malloc(&mut p)).map(|_| Info(p))
+    }
+
+    fn from_iter(c: &Ctl, device: i32, sub: i32, dir: Direction) -> Result<Info> {
+        let r = Info::new()?;
+        unsafe { alsa::snd_rawmidi_info_set_device(r.0, device as c_uint) };
+        let d = match dir {
+            Direction::Playback => alsa::SND_RAWMIDI_STREAM_OUTPUT,
+            Direction::Capture => alsa::SND_RAWMIDI_STREAM_INPUT,
+        };
+        unsafe { alsa::snd_rawmidi_info_set_stream(r.0, d) };
+        unsafe { alsa::snd_rawmidi_info_set_subdevice(r.0, sub as c_uint) };
+        acheck!(snd_ctl_rawmidi_info(ctl_ptr(c), r.0)).map(|_| r)
+    }
+
+    fn subdev_count(c: &Ctl, device: c_int) -> Result<(i32, i32)> {
+        let i = Info::from_iter(c, device, 0, Direction::Capture)?;
+        let o = Info::from_iter(c, device, 0, Direction::Playback)?;
+        Ok((unsafe { alsa::snd_rawmidi_info_get_subdevices_count(o.0) as i32 },
+            unsafe { alsa::snd_rawmidi_info_get_subdevices_count(i.0) as i32 }))
+    }
+
+    pub fn get_device(&self) -> i32 { unsafe { alsa::snd_rawmidi_info_get_device(self.0) as i32 }}
+    pub fn get_subdevice(&self) -> i32 { unsafe { alsa::snd_rawmidi_info_get_subdevice(self.0) as i32 }}
+    pub fn get_stream(&self) -> super::Direction {
+        if unsafe { alsa::snd_rawmidi_info_get_stream(self.0) } == alsa::SND_RAWMIDI_STREAM_OUTPUT { super::Direction::Playback }
+        else { super::Direction::Capture }
+    }
+
+    pub fn get_subdevice_name(&self) -> Result<String> {
+        let c = unsafe { alsa::snd_rawmidi_info_get_subdevice_name(self.0) };
+        from_const("snd_rawmidi_info_get_subdevice_name", c).map(|s| s.to_string())
+    }
+    pub fn get_id(&self) -> Result<String> {
+        let c = unsafe { alsa::snd_rawmidi_info_get_id(self.0) };
+        from_const("snd_rawmidi_info_get_id", c).map(|s| s.to_string())
+    }
+}
+
+/// [snd_rawmidi_info_t](http://www.alsa-project.org/alsa-doc/alsa-lib/group___raw_midi.html) wrapper
+pub struct Status(*mut alsa::snd_rawmidi_status_t);
+
+impl Status {
+    fn new() -> Result<Self> {
+        let mut p = ptr::null_mut();
+        acheck!(snd_rawmidi_status_malloc(&mut p)).map(|_| Status(p))
+    }
+}
+
+impl Status {
+    pub fn get_avail(&self) -> usize { unsafe { alsa::snd_rawmidi_status_get_avail(self.0 as *const _) } }
+    pub fn get_xruns(&self) -> usize { unsafe { alsa::snd_rawmidi_status_get_xruns(self.0 as *const _) } }
+}
+
+impl Drop for Status {
+    fn drop(&mut self) { unsafe { alsa::snd_rawmidi_status_free(self.0) }; }
+}
+
+
+impl<'a> Iter<'a> {
+    pub fn new(c: &'a Ctl) -> Iter<'a> { Iter { ctl: c, device: -1, in_count: 0, out_count: 0, current: 0 }}
+}
+
+impl<'a> Iterator for Iter<'a> {
+    type Item = Result<Info>;
+    fn next(&mut self) -> Option<Result<Info>> {
+        if self.current < self.in_count {
+            self.current += 1;
+            return Some(Info::from_iter(self.ctl, self.device, self.current-1, Direction::Capture));
+        }
+        if self.current - self.in_count < self.out_count {
+            self.current += 1;
+            return Some(Info::from_iter(self.ctl, self.device, self.current-1-self.in_count, Direction::Playback));
+        }
+
+        let r = acheck!(snd_ctl_rawmidi_next_device(ctl_ptr(self.ctl), &mut self.device));
+        match r {
+            Err(e) => return Some(Err(e)),
+            Ok(_) if self.device == -1 => return None,
+            _ => {},
+        }
+        self.current = 0;
+        match Info::subdev_count(self.ctl, self.device) {
+            Err(e) => Some(Err(e)),
+            Ok((oo, ii)) => {
+                self.in_count = ii;
+                self.out_count = oo;
+                self.next()
+            }
+        }
+    }
+}
+
+/// [snd_rawmidi_t](http://www.alsa-project.org/alsa-doc/alsa-lib/group___raw_midi.html) wrapper
+pub struct Rawmidi(*mut alsa::snd_rawmidi_t);
+
+unsafe impl Send for Rawmidi {}
+
+impl Drop for Rawmidi {
+    fn drop(&mut self) { unsafe { alsa::snd_rawmidi_close(self.0) }; }
+}
+
+impl Rawmidi {
+
+    /// Wrapper around open that takes a &str instead of a &CStr
+    pub fn new(name: &str, dir: Direction, nonblock: bool) -> Result<Self> {
+        Self::open(&CString::new(name).unwrap(), dir, nonblock)
+    }
+
+    pub fn open(name: &CStr, dir: Direction, nonblock: bool) -> Result<Rawmidi> {
+        let mut h = ptr::null_mut();
+        let flags = if nonblock { 2 } else { 0 }; // FIXME: alsa::SND_RAWMIDI_NONBLOCK does not exist in alsa-sys
+        acheck!(snd_rawmidi_open(
+            if dir == Direction::Capture { &mut h } else { ptr::null_mut() },
+            if dir == Direction::Playback { &mut h } else { ptr::null_mut() },
+            name.as_ptr(), flags))
+            .map(|_| Rawmidi(h))
+    }
+
+    pub fn info(&self) -> Result<Info> {
+        Info::new().and_then(|i| acheck!(snd_rawmidi_info(self.0, i.0)).map(|_| i))
+    }
+
+    pub fn status(&self) -> Result<Status> {
+        Status::new().and_then(|i| acheck!(snd_rawmidi_status(self.0, i.0)).map(|_| i))
+    }
+
+    pub fn drop(&self) -> Result<()> { acheck!(snd_rawmidi_drop(self.0)).map(|_| ()) }
+    pub fn drain(&self) -> Result<()> { acheck!(snd_rawmidi_drain(self.0)).map(|_| ()) }
+    pub fn name(&self) -> Result<String> {
+        let c = unsafe { alsa::snd_rawmidi_name(self.0) };
+        from_const("snd_rawmidi_name", c).map(|s| s.to_string())
+    }
+
+    pub fn io(&self) -> IO { IO(self) }
+}
+
+impl poll::Descriptors for Rawmidi {
+    fn count(&self) -> usize {
+        unsafe { alsa::snd_rawmidi_poll_descriptors_count(self.0) as usize }
+    }
+    fn fill(&self, p: &mut [pollfd]) -> Result<usize> {
+        let z = unsafe { alsa::snd_rawmidi_poll_descriptors(self.0, p.as_mut_ptr(), p.len() as c_uint) };
+        from_code("snd_rawmidi_poll_descriptors", z).map(|_| z as usize)
+    }
+    fn revents(&self, p: &[pollfd]) -> Result<poll::Flags> {
+        let mut r = 0;
+        let z = unsafe { alsa::snd_rawmidi_poll_descriptors_revents(self.0, p.as_ptr() as *mut pollfd, p.len() as c_uint, &mut r) };
+        from_code("snd_rawmidi_poll_descriptors_revents", z).map(|_| poll::Flags::from_bits_truncate(r as c_short))
+    }
+}
+
+/// Implements `std::io::Read` and `std::io::Write` for `Rawmidi`
+pub struct IO<'a>(&'a Rawmidi);
+
+impl<'a> io::Read for IO<'a> {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        let r = unsafe { alsa::snd_rawmidi_read((self.0).0, buf.as_mut_ptr() as *mut c_void, buf.len() as size_t) };
+        if r < 0 { Err(io::Error::from_raw_os_error(r as i32)) }
+        else { Ok(r as usize) }
+    }
+}
+
+impl<'a> io::Write for IO<'a> {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        let r = unsafe { alsa::snd_rawmidi_write((self.0).0, buf.as_ptr() as *const c_void, buf.len() as size_t) };
+        if r < 0 { Err(io::Error::from_raw_os_error(r as i32)) }
+        else { Ok(r as usize) }
+    }
+    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+}
+
+
+#[test]
+fn print_rawmidis() {
+    for a in super::card::Iter::new().map(|a| a.unwrap()) {
+        for b in Iter::new(&Ctl::from_card(&a, false).unwrap()).map(|b| b.unwrap()) {
+            println!("Rawmidi {:?} (hw:{},{},{}) {} - {}", b.get_stream(), a.get_index(), b.get_device(), b.get_subdevice(),
+                 a.get_name().unwrap(), b.get_subdevice_name().unwrap())
+        }
+    }
+}