2017-06-29 12:25:40 +00:00
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use errors::*;
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2017-06-29 21:35:39 +00:00
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use glib;
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2017-07-01 23:35:12 +00:00
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use std::cell::Cell;
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2017-06-30 19:10:33 +00:00
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use std::cell::RefCell;
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use std::rc::Rc;
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2017-06-30 23:56:32 +00:00
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use std::f64;
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2017-07-01 22:03:21 +00:00
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use alsa_pn::*;
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-30 20:36:34 +00:00
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#[derive(Clone, Copy, Debug)]
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pub enum AudioUser {
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AudioUserUnknown,
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AudioUserPopup,
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AudioUserTrayIcon,
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AudioUserHotkeys,
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}
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#[derive(Clone, Copy, Debug)]
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pub enum AudioSignal {
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AudioNoCard,
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AudioCardInitialized,
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AudioCardCleanedUp,
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AudioCardDisconnected,
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AudioCardError,
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AudioValuesChanged,
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}
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2017-07-01 22:03:21 +00:00
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pub struct Audio {
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2017-06-29 12:25:40 +00:00
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_cannot_construct: (),
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2017-07-01 22:03:21 +00:00
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pub acard: RefCell<Box<AlsaCard>>,
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2017-07-01 23:45:30 +00:00
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pub last_action_timestamp: Rc<RefCell<i64>>,
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2017-07-01 22:03:21 +00:00
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pub handlers: Rc<RefCell<Vec<Box<Fn(AudioSignal, AudioUser)>>>>,
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2017-07-01 23:35:12 +00:00
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pub scroll_step: Cell<u32>,
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2017-06-29 12:25:40 +00:00
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}
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2017-06-29 12:55:07 +00:00
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2017-07-01 22:03:21 +00:00
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impl Audio {
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2017-06-30 19:10:33 +00:00
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pub fn new(card_name: Option<String>,
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elem_name: Option<String>)
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-> Result<Audio> {
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let handlers = Rc::new(RefCell::new(vec![]));
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2017-07-01 23:45:30 +00:00
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let last_action_timestamp = Rc::new(RefCell::new(0));
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2017-07-01 22:03:21 +00:00
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let myhandler = handlers.clone();
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let ts = last_action_timestamp.clone();
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let cb = Rc::new(move |event| {
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Audio::on_alsa_event(&mut *ts.borrow_mut(),
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&myhandler.borrow(),
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event)
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});
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let audio = Audio {
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_cannot_construct: (),
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acard: RefCell::new(AlsaCard::new(card_name, elem_name, cb)?),
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last_action_timestamp: last_action_timestamp.clone(),
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handlers: handlers.clone(),
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scroll_step: Cell::new(5),
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2017-06-29 12:25:40 +00:00
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};
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2017-06-28 12:55:38 +00:00
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2017-07-01 22:03:21 +00:00
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return Ok(audio);
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}
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2017-06-29 12:55:07 +00:00
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2017-06-30 23:56:32 +00:00
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2017-07-01 22:03:21 +00:00
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pub fn switch_acard(&self,
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card_name: Option<String>,
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elem_name: Option<String>)
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-> Result<()> {
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2017-07-01 23:35:12 +00:00
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debug!("Switching cards");
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let cb = self.acard.borrow().cb.clone();
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let mut ac = self.acard.borrow_mut();
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2017-07-01 23:35:12 +00:00
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*ac = AlsaCard::new(card_name,
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elem_name,
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cb)?;
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2017-06-30 23:56:32 +00:00
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2017-07-01 22:03:21 +00:00
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return Ok(());
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2017-06-29 12:25:40 +00:00
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}
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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pub fn vol(&self) -> Result<f64> {
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return self.acard.borrow().get_vol();
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}
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-29 21:35:39 +00:00
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pub fn set_vol(&self, new_vol: f64, user: AudioUser) -> Result<()> {
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2017-06-30 15:24:26 +00:00
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{
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let mut rc = self.last_action_timestamp.borrow_mut();
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*rc = glib::get_monotonic_time();
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}
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2017-06-29 21:35:39 +00:00
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// TODO invoke handlers, make use of user
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2017-06-30 20:08:08 +00:00
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debug!("Setting vol to {:?} by user {:?}", new_vol, user);
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2017-07-01 22:03:21 +00:00
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return self.acard.borrow().set_vol(new_vol);
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}
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-30 23:56:32 +00:00
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pub fn increase_vol(&self, user: AudioUser) -> Result<()> {
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{
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let mut rc = self.last_action_timestamp.borrow_mut();
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*rc = glib::get_monotonic_time();
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}
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let old_vol = self.vol()?;
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2017-07-01 23:35:12 +00:00
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let new_vol = f64::ceil(old_vol + (self.scroll_step.get() as f64));
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2017-06-30 23:56:32 +00:00
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debug!("Increase vol by {:?} to {:?}", (new_vol - old_vol), new_vol);
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return self.set_vol(new_vol, user);
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}
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pub fn decrease_vol(&self, user: AudioUser) -> Result<()> {
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{
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let mut rc = self.last_action_timestamp.borrow_mut();
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*rc = glib::get_monotonic_time();
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}
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let old_vol = self.vol()?;
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2017-07-01 23:35:12 +00:00
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let new_vol = old_vol - (self.scroll_step.get() as f64);
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2017-06-30 23:56:32 +00:00
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debug!("Decrease vol by {:?} to {:?}", (new_vol - old_vol), new_vol);
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return self.set_vol(new_vol, user);
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}
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2017-06-29 12:25:40 +00:00
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pub fn has_mute(&self) -> bool {
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return self.acard.borrow().has_mute();
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}
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2017-06-26 07:08:37 +00:00
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2017-06-29 12:55:07 +00:00
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2017-06-29 12:25:40 +00:00
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pub fn get_mute(&self) -> Result<bool> {
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return self.acard.borrow().get_mute();
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2017-06-26 07:08:37 +00:00
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}
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2017-06-29 12:55:07 +00:00
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2017-06-29 21:35:39 +00:00
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pub fn set_mute(&self, mute: bool, user: AudioUser) -> Result<()> {
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let mut rc = self.last_action_timestamp.borrow_mut();
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2017-06-30 15:24:26 +00:00
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*rc = glib::get_monotonic_time();
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2017-06-29 21:35:39 +00:00
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// TODO invoke handlers, make use of user
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2017-06-30 20:08:08 +00:00
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debug!("Setting mute to {} by user {:?}", mute, user);
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2017-07-01 22:03:21 +00:00
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return self.acard.borrow().set_mute(mute);
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}
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pub fn connect_handler(&self, cb: Box<Fn(AudioSignal, AudioUser)>) {
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self.handlers.borrow_mut().push(cb);
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}
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fn invoke_handlers(handlers: &Vec<Box<Fn(AudioSignal, AudioUser)>>,
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signal: AudioSignal,
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user: AudioUser) {
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debug!("Invoking handlers for signal {:?} by user {:?}",
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signal,
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user);
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for handler in handlers {
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let unboxed = handler.as_ref();
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unboxed(signal, user);
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}
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2017-06-29 12:25:40 +00:00
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}
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2017-06-29 21:35:39 +00:00
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2017-07-01 22:03:21 +00:00
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fn on_alsa_event(last_action_timestamp: &mut i64,
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handlers: &Vec<Box<Fn(AudioSignal, AudioUser)>>,
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alsa_event: AlsaEvent) {
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let last: i64 = *last_action_timestamp;
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2017-06-30 19:10:33 +00:00
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if last != 0 {
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let now: i64 = glib::get_monotonic_time();
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let delay: i64 = now - last;
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if delay < 1000000 {
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return;
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}
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2017-06-30 20:08:08 +00:00
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debug!("Discarding last time stamp, too old");
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*last_action_timestamp = 0;
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2017-06-30 19:10:33 +00:00
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}
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2017-06-29 21:35:39 +00:00
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/* external change */
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match alsa_event {
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// TODO: invoke handlers with AudioUserUnknown
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2017-06-30 20:08:08 +00:00
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AlsaEvent::AlsaCardError => debug!("AlsaCardError"),
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AlsaEvent::AlsaCardDiconnected => debug!("AlsaCardDiconnected"),
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AlsaEvent::AlsaCardValuesChanged => {
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2017-06-30 20:08:08 +00:00
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debug!("AlsaCardValuesChanged");
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2017-07-01 22:03:21 +00:00
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Audio::invoke_handlers(handlers,
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self::AudioSignal::AudioValuesChanged,
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self::AudioUser::AudioUserUnknown);
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2017-06-30 15:24:26 +00:00
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}
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2017-06-30 20:08:08 +00:00
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e => warn!("Unhandled alsa event: {:?}", e),
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2017-06-29 21:35:39 +00:00
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}
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}
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2017-06-28 15:53:19 +00:00
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}
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