Struct alsa::Ctl

pub struct Ctl(_);

snd_ctl_t wrapper

Methods

impl Ctl

fn new(c: &str, nonblock: bool) -> Result<Self>

Wrapper around open that takes a &str instead of a &CStr

fn open(c: &CStr, nonblock: bool) -> Result<Ctl>

Open does not support async mode (it's not very Rustic anyway)

fn from_card(c: &Card, nonblock: bool) -> Result<Ctl>

fn card_info(&self) -> Result<CardInfo>

fn wait(&self, timeout_ms: Option<u32>) -> Result<bool>

fn get_db_range(&self, id: &ElemId) -> Result<(MilliBel, MilliBel)>

fn convert_to_db(&self, id: &ElemId, volume: i64) -> Result<MilliBel>

fn convert_from_db(&self, id: &ElemId, mb: MilliBel, dir: Round) -> Result<i64>

fn subscribe_events(&self, subscribe: bool) -> Result<()>

Note: According to alsa-lib documentation, you're also supposed to have functionality for returning whether or not you are subscribed. This does not work in practice, so I'm not including that here.

fn read(&self) -> Result<Option<Event>>

Trait Implementations

impl Send for Ctl

impl Drop for Ctl

fn drop(&mut self)

Executes the destructor for this type.

impl PollDescriptors for Ctl

fn count(&self) -> usize

fn fill(&self, p: &mut [pollfd]) -> Result<usize>

fn revents(&self, p: &[pollfd]) -> Result<PollFlags>

fn get(&self) -> Result<Vec<pollfd>>

Wrapper around count and fill - returns an array of pollfds