rob
/
cpal
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add some sane error messages

This commit is contained in:
psych0d0g 2016-01-15 21:16:34 +01:00
parent ef1e12fa3d
commit 7c3aab71a2
1 changed files with 26 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/alsa/mod.rs
View File

@ -27,14 +27,14 @@ impl Endpoint {
{ {
unsafe { unsafe {
let mut playback_handle = mem::uninitialized(); let mut playback_handle = mem::uninitialized();
let device_name = ffi::CString::new(self.0.clone()).unwrap(); let device_name = ffi::CString::new(self.0.clone()).expect("Unable to get device name");
match alsa::snd_pcm_open(&mut playback_handle, device_name.as_ptr() as *const _, match alsa::snd_pcm_open(&mut playback_handle, device_name.as_ptr() as *const _,
alsa::SND_PCM_STREAM_PLAYBACK, alsa::SND_PCM_NONBLOCK) alsa::SND_PCM_STREAM_PLAYBACK, alsa::SND_PCM_NONBLOCK)
{ {
-2 | -2 |
-16 /* determined empirically */ => return Err(FormatsEnumerationError::DeviceNotAvailable), -16 /* determined empirically */ => return Err(FormatsEnumerationError::DeviceNotAvailable),
e => check_errors(e).unwrap() e => check_errors(e).expect("device not available")
} }
let hw_params = HwParams::alloc(); let hw_params = HwParams::alloc();
@ -93,9 +93,9 @@ impl Endpoint {
} }
let mut min_rate = mem::uninitialized(); let mut min_rate = mem::uninitialized();
check_errors(alsa::snd_pcm_hw_params_get_rate_min(hw_params.0, &mut min_rate, ptr::null_mut())).unwrap(); check_errors(alsa::snd_pcm_hw_params_get_rate_min(hw_params.0, &mut min_rate, ptr::null_mut())).expect("unable to get minimum supported rete");
let mut max_rate = mem::uninitialized(); let mut max_rate = mem::uninitialized();
check_errors(alsa::snd_pcm_hw_params_get_rate_max(hw_params.0, &mut max_rate, ptr::null_mut())).unwrap(); check_errors(alsa::snd_pcm_hw_params_get_rate_max(hw_params.0, &mut max_rate, ptr::null_mut())).expect("unable to get maximum supported rate");
let samples_rates = if min_rate == max_rate { let samples_rates = if min_rate == max_rate {
vec![min_rate] vec![min_rate]
@ -133,9 +133,9 @@ impl Endpoint {
}; };
let mut min_channels = mem::uninitialized(); let mut min_channels = mem::uninitialized();
check_errors(alsa::snd_pcm_hw_params_get_channels_min(hw_params.0, &mut min_channels)).unwrap(); check_errors(alsa::snd_pcm_hw_params_get_channels_min(hw_params.0, &mut min_channels)).expect("unable to get minimum supported channel count");
let mut max_channels = mem::uninitialized(); let mut max_channels = mem::uninitialized();
check_errors(alsa::snd_pcm_hw_params_get_channels_max(hw_params.0, &mut max_channels)).unwrap(); check_errors(alsa::snd_pcm_hw_params_get_channels_max(hw_params.0, &mut max_channels)).expect("unable to get maximum supported channel count");
let max_channels = cmp::min(max_channels, 32); // TODO: limiting to 32 channels or too much stuff is returned let max_channels = cmp::min(max_channels, 32); // TODO: limiting to 32 channels or too much stuff is returned
let supported_channels = (min_channels .. max_channels + 1).filter_map(|num| { let supported_channels = (min_channels .. max_channels + 1).filter_map(|num| {
if alsa::snd_pcm_hw_params_test_channels(playback_handle, hw_params.0, num) == 0 { if alsa::snd_pcm_hw_params_test_channels(playback_handle, hw_params.0, num) == 0 {
@ -193,7 +193,7 @@ impl HwParams {
pub fn alloc() -> HwParams { pub fn alloc() -> HwParams {
unsafe { unsafe {
let mut hw_params = mem::uninitialized(); let mut hw_params = mem::uninitialized();
check_errors(alsa::snd_pcm_hw_params_malloc(&mut hw_params)).unwrap(); check_errors(alsa::snd_pcm_hw_params_malloc(&mut hw_params)).expect("unable to get hardware parameters");
HwParams(hw_params) HwParams(hw_params)
} }
} }
@ -210,14 +210,14 @@ impl Drop for HwParams {
impl Voice { impl Voice {
pub fn new(endpoint: &Endpoint, format: &Format) -> Result<Voice, CreationError> { pub fn new(endpoint: &Endpoint, format: &Format) -> Result<Voice, CreationError> {
unsafe { unsafe {
let name = ffi::CString::new(endpoint.0.clone()).unwrap(); let name = ffi::CString::new(endpoint.0.clone()).expect("unable to clone endpoint");
let mut playback_handle = mem::uninitialized(); let mut playback_handle = mem::uninitialized();
match alsa::snd_pcm_open(&mut playback_handle, name.as_ptr(), match alsa::snd_pcm_open(&mut playback_handle, name.as_ptr(),
alsa::SND_PCM_STREAM_PLAYBACK, alsa::SND_PCM_NONBLOCK) alsa::SND_PCM_STREAM_PLAYBACK, alsa::SND_PCM_NONBLOCK)
{ {
-16 /* determined empirically */ => return Err(CreationError::DeviceNotAvailable), -16 /* determined empirically */ => return Err(CreationError::DeviceNotAvailable),
e => check_errors(e).unwrap() e => check_errors(e).expect("Device unavailable")
} }
// TODO: check endianess // TODO: check endianess
@ -228,19 +228,19 @@ impl Voice {
}; };
let hw_params = HwParams::alloc(); let hw_params = HwParams::alloc();
check_errors(alsa::snd_pcm_hw_params_any(playback_handle, hw_params.0)).unwrap(); check_errors(alsa::snd_pcm_hw_params_any(playback_handle, hw_params.0)).expect("Errors on playback handle");
check_errors(alsa::snd_pcm_hw_params_set_access(playback_handle, hw_params.0, alsa::SND_PCM_ACCESS_RW_INTERLEAVED)).unwrap(); check_errors(alsa::snd_pcm_hw_params_set_access(playback_handle, hw_params.0, alsa::SND_PCM_ACCESS_RW_INTERLEAVED)).expect("handle not acessible");
check_errors(alsa::snd_pcm_hw_params_set_format(playback_handle, hw_params.0, data_type)).unwrap(); check_errors(alsa::snd_pcm_hw_params_set_format(playback_handle, hw_params.0, data_type)).expect("format could not be set");
check_errors(alsa::snd_pcm_hw_params_set_rate(playback_handle, hw_params.0, format.samples_rate.0 as libc::c_uint, 0)).unwrap(); check_errors(alsa::snd_pcm_hw_params_set_rate(playback_handle, hw_params.0, format.samples_rate.0 as libc::c_uint, 0)).expect("sample rate could not be set");
check_errors(alsa::snd_pcm_hw_params_set_channels(playback_handle, hw_params.0, format.channels.len() as libc::c_uint)).unwrap(); check_errors(alsa::snd_pcm_hw_params_set_channels(playback_handle, hw_params.0, format.channels.len() as libc::c_uint)).expect("channel count could not be set");
check_errors(alsa::snd_pcm_hw_params(playback_handle, hw_params.0)).unwrap(); check_errors(alsa::snd_pcm_hw_params(playback_handle, hw_params.0)).expect("hardware params could not be set");
check_errors(alsa::snd_pcm_prepare(playback_handle)).unwrap(); check_errors(alsa::snd_pcm_prepare(playback_handle)).expect("could not get playback handle");
let (buffer_len, period_len) = { let (buffer_len, period_len) = {
let mut buffer = mem::uninitialized(); let mut buffer = mem::uninitialized();
let mut period = mem::uninitialized(); let mut period = mem::uninitialized();
check_errors(alsa::snd_pcm_get_params(playback_handle, &mut buffer, &mut period)).unwrap(); check_errors(alsa::snd_pcm_get_params(playback_handle, &mut buffer, &mut period)).expect("could not initialize buffer");
assert!(buffer != 0); assert!(buffer != 0);
let buffer = buffer as usize * format.channels.len(); let buffer = buffer as usize * format.channels.len();
let period = period as usize * format.channels.len(); let period = period as usize * format.channels.len();
@ -258,14 +258,14 @@ impl Voice {
pub fn append_data<'a, T>(&'a mut self, max_elements: usize) -> Buffer<'a, T> where T: Clone { pub fn append_data<'a, T>(&'a mut self, max_elements: usize) -> Buffer<'a, T> where T: Clone {
let available = { let available = {
let channel = self.channel.lock().unwrap(); let channel = self.channel.lock().expect("could not lock channel");
let available = unsafe { alsa::snd_pcm_avail(*channel) }; let available = unsafe { alsa::snd_pcm_avail(*channel) };
if available == -32 { if available == -32 {
// buffer underrun // buffer underrun
self.buffer_len self.buffer_len
} else if available < 0 { } else if available < 0 {
check_errors(available as libc::c_int).unwrap(); check_errors(available as libc::c_int).expect("buffer is not available");
unreachable!() unreachable!()
} else { } else {
(available * self.num_channels as alsa::snd_pcm_sframes_t) as usize (available * self.num_channels as alsa::snd_pcm_sframes_t) as usize
@ -298,13 +298,13 @@ impl Voice {
pub fn get_pending_samples(&self) -> usize { pub fn get_pending_samples(&self) -> usize {
let available = { let available = {
let channel = self.channel.lock().unwrap(); let channel = self.channel.lock().expect("could not lock channel");
let available = unsafe { alsa::snd_pcm_avail(*channel) }; let available = unsafe { alsa::snd_pcm_avail(*channel) };
if available == -32 { if available == -32 {
0 // buffer underrun 0 // buffer underrun
} else if available < 0 { } else if available < 0 {
check_errors(available as libc::c_int).unwrap(); check_errors(available as libc::c_int).expect("could not write to buffer");
unreachable!() unreachable!()
} else { } else {
available * self.num_channels as alsa::snd_pcm_sframes_t available * self.num_channels as alsa::snd_pcm_sframes_t
@ -315,7 +315,7 @@ impl Voice {
} }
pub fn underflowed(&self) -> bool { pub fn underflowed(&self) -> bool {
let channel = self.channel.lock().unwrap(); let channel = self.channel.lock().expect("channel underflow");
let state = unsafe { alsa::snd_pcm_state(*channel) }; let state = unsafe { alsa::snd_pcm_state(*channel) };
state == alsa::SND_PCM_STATE_XRUN state == alsa::SND_PCM_STATE_XRUN
@ -329,7 +329,7 @@ impl Drop for Voice {
#[inline] #[inline]
fn drop(&mut self) { fn drop(&mut self) {
unsafe { unsafe {
alsa::snd_pcm_close(*self.channel.lock().unwrap()); alsa::snd_pcm_close(*self.channel.lock().expect("drop for voice"));
} }
} }
} }
@ -348,7 +348,7 @@ impl<'a, T> Buffer<'a, T> {
pub fn finish(self) { pub fn finish(self) {
let to_write = (self.buffer.len() / self.channel.num_channels as usize) let to_write = (self.buffer.len() / self.channel.num_channels as usize)
as alsa::snd_pcm_uframes_t; as alsa::snd_pcm_uframes_t;
let channel = self.channel.channel.lock().unwrap(); let channel = self.channel.channel.lock().expect("Buffer channel lock failed");
unsafe { unsafe {
loop { loop {
@ -360,7 +360,7 @@ impl<'a, T> Buffer<'a, T> {
// buffer underrun // buffer underrun
alsa::snd_pcm_prepare(*channel); alsa::snd_pcm_prepare(*channel);
} else if result < 0 { } else if result < 0 {
check_errors(result as libc::c_int).unwrap(); check_errors(result as libc::c_int).expect("could not write pcm");
} else { } else {
assert_eq!(result as alsa::snd_pcm_uframes_t, to_write); assert_eq!(result as alsa::snd_pcm_uframes_t, to_write);
break; break;
@ -377,7 +377,7 @@ fn check_errors(err: libc::c_int) -> Result<(), String> {
if err < 0 { if err < 0 {
unsafe { unsafe {
let s = ffi::CStr::from_ptr(alsa::snd_strerror(err)).to_bytes().to_vec(); let s = ffi::CStr::from_ptr(alsa::snd_strerror(err)).to_bytes().to_vec();
let s = String::from_utf8(s).unwrap(); let s = String::from_utf8(s).expect("Streaming error occured");
return Err(s); return Err(s);
} }
} }