Struct PCM

pub struct PCM(/* private fields */);

snd_pcm_t wrapper - start here for audio playback and recording

Implementations

impl PCM

pub fn new(name: &str, dir: Direction, nonblock: bool) -> Result<PCM>

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

pub fn open(name: &CStr, dir: Direction, nonblock: bool) -> Result<PCM>

pub fn start(&self) -> Result<()>

pub fn drop(&self) -> Result<()>

pub fn pause(&self, pause: bool) -> Result<()>

pub fn resume(&self) -> Result<()>

pub fn drain(&self) -> Result<()>

pub fn prepare(&self) -> Result<()>

pub fn reset(&self) -> Result<()>

pub fn recover(&self, err: c_int, silent: bool) -> Result<()>

pub fn try_recover(&self, err: Error, silent: bool) -> Result<()>

Wrapper around snd_pcm_recover.

Returns Ok if the error was successfully recovered from, or the original error if the error was unhandled.

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

pub fn state(&self) -> State

pub fn state_raw(&self) -> c_int

Only used internally, and for debugging the alsa library. Please use the “state” function instead.

pub fn bytes_to_frames(&self, i: isize) -> Frames

pub fn frames_to_bytes(&self, i: Frames) -> isize

pub fn avail_update(&self) -> Result<Frames>

pub fn avail(&self) -> Result<Frames>

pub fn avail_delay(&self) -> Result<(Frames, Frames)>

pub fn delay(&self) -> Result<Frames>

pub fn status(&self) -> Result<Status>

pub fn io_i8(&self) -> Result<IO<'_, i8>>

pub fn io_u8(&self) -> Result<IO<'_, u8>>

pub fn io_i16(&self) -> Result<IO<'_, i16>>

pub fn io_u16(&self) -> Result<IO<'_, u16>>

pub fn io_i32(&self) -> Result<IO<'_, i32>>

pub fn io_u32(&self) -> Result<IO<'_, u32>>

pub fn io_f32(&self) -> Result<IO<'_, f32>>

pub fn io_f64(&self) -> Result<IO<'_, f64>>

pub fn io_checked<S: IoFormat>(&self) -> Result<IO<'_, S>>

pub unsafe fn io_unchecked<S: IoFormat>(&self) -> IO<'_, S>

Creates IO without checking [S] is valid type.

SAFETY: Caller must guarantee [S] is valid type for this PCM stream and that no other IO objects exist at the same time for the same stream (or in some other way guarantee mmap safety)

pub fn io(&self) -> IO<'_, u8>

👎Deprecated: renamed to io_bytes

pub fn io_bytes(&self) -> IO<'_, u8>

pub fn direct_mmap_capture<S>(&self) -> Result<MmapCapture<S>>

Read buffers by talking to the kernel directly, bypassing alsa-lib.

pub fn direct_mmap_playback<S>(&self) -> Result<MmapPlayback<S>>

Write buffers by talking to the kernel directly, bypassing alsa-lib.

pub fn hw_params(&self, h: &HwParams<'_>) -> Result<()>

Sets hw parameters. Note: No IO object can exist for this PCM when hw parameters are set.

pub fn hw_params_current(&self) -> Result<HwParams<'_>>

Retreive current PCM hardware configuration.

pub fn sw_params(&self, h: &SwParams<'_>) -> Result<()>

pub fn sw_params_current(&self) -> Result<SwParams<'_>>

pub fn get_params(&self) -> Result<(u64, u64)>

Wraps snd_pcm_get_params, returns (buffer_size, period_size).

pub fn info(&self) -> Result<Info>

pub fn dump(&self, o: &mut Output) -> Result<()>

pub fn dump_hw_setup(&self, o: &mut Output) -> Result<()>

pub fn dump_sw_setup(&self, o: &mut Output) -> Result<()>

pub fn query_chmaps(&self) -> ChmapsQuery

pub fn set_chmap(&self, c: &Chmap) -> Result<()>

pub fn get_chmap(&self) -> Result<Chmap>

pub fn link(&self, other: &PCM) -> Result<()>

pub fn unlink(&self) -> Result<()>

Trait Implementations

impl Descriptors for PCM

fn count(&self) -> usize

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

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

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

Wrapper around count and fill - returns an array of pollfds

impl Drop for PCM

fn drop(&mut self)

Executes the destructor for this type.

impl Send for PCM