85 lines
2.7 KiB
Rust
85 lines
2.7 KiB
Rust
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use audio::pulseaudio::Sink;
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use errors::*;
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use libc;
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use libpulse_sys::*;
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use std::ffi::CStr;
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use std::mem;
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pub fn get_sinks(mainloop: *mut pa_threaded_mainloop,
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ctx: *mut pa_context) -> Result<Vec<Sink>> {
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unsafe {
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let mut v = vec![];
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{
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pa_threaded_mainloop_lock(mainloop);
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let _data = &mut(mainloop, &mut v);
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let data = mem::transmute::<&mut(*mut pa_threaded_mainloop,
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&mut Vec<Sink>),
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*mut libc::c_void>(_data);
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let o = pa_context_get_sink_info_list(ctx,
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Some(get_all_sinks),
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data);
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if o.is_null() {
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pa_threaded_mainloop_unlock(mainloop);
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bail!("Failed to initialize PA operation!");
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}
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while pa_operation_get_state(o) == PA_OPERATION_RUNNING {
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pa_threaded_mainloop_wait(mainloop);
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}
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pa_operation_unref(o);
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pa_threaded_mainloop_unlock(mainloop);
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}
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return Ok(v);
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}
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}
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unsafe extern "C" fn get_all_sinks(
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ctx: *mut pa_context,
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i: *const pa_sink_info,
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eol: i32,
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data: *mut libc::c_void) {
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let &mut(mainloop, vec) = mem::transmute::<*mut libc::c_void,
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&mut(*mut pa_threaded_mainloop,
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*mut Vec<Sink>)>(data);
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assert!(!mainloop.is_null(), "Mainloop is null");
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if i.is_null() {
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return
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}
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let name = CStr::from_ptr((*i).name).to_str().unwrap().to_owned();
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let index = (*i).index;
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let description = CStr::from_ptr((*i).description).to_str().unwrap().to_owned();
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let channels = (*i).channel_map.channels;
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(*vec).push(Sink {
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name,
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index,
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description,
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channels,
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});
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pa_threaded_mainloop_signal(mainloop, 0);
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}
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pub fn get_first_sink(mainloop: *mut pa_threaded_mainloop,
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ctx: *mut pa_context) -> Result<Sink> {
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let sinks = get_sinks(mainloop, ctx)?;
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ensure!(!sinks.is_empty(), "No sinks found!");
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return Ok(sinks[0].clone());
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}
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// TODO: Could be done directly via PA API.
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pub fn get_sink_by_desc(mainloop: *mut pa_threaded_mainloop,
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ctx: *mut pa_context,
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desc: &str) -> Result<Sink> {
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let sinks = get_sinks(mainloop, ctx)?;
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ensure!(!sinks.is_empty(), "No sinks found!");
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return Ok(sinks.into_iter()
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.find(|s| s.description == desc)
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.map(|s| s.clone())
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.ok_or("No sink found with desc")?);
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}
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