#ALSA #audio #sound

alsa

Thin but safe wrappers for ALSA (Linux sound API)

17 releases

0.2.0 Oct 11, 2017
0.1.8 Apr 4, 2017
0.1.7 Mar 29, 2017
0.1.3 Sep 3, 2016
0.0.5 Jun 21, 2015

#12 in Audio

Download history 156/week @ 2018-05-27 176/week @ 2018-06-03 63/week @ 2018-06-10 185/week @ 2018-06-17 135/week @ 2018-06-24 341/week @ 2018-07-01 131/week @ 2018-07-08 116/week @ 2018-07-15 294/week @ 2018-07-22 292/week @ 2018-07-29 285/week @ 2018-08-05 172/week @ 2018-08-12 128/week @ 2018-08-19

349 downloads per month

Thin but safe wrappers for ALSA.

API Documentation

Crates.io

Expect the following to work:

  • Audio Playback

  • Audio Recording

  • Mixer controls

  • HCtl API (for jack detection)

  • Raw midi

  • Midi sequencer API (most of it)

  • Enumerations of all of the above

  • Poll and/or wait for all of the above

The following is not yet implemented (mostly because nobody asked for them) :

  • Separate timer API (snd_timer_*)

  • Config API (snd_config_*)

  • Plug-in API

Quickstart guide / API design:

  • Most functions map 1-to-1 to alsa-lib functions, e g, ctl::CardInfo::get_id() is a wrapper around snd_ctl_card_info_get_id and the alsa-lib documentation can be consulted for additional information.

  • Structs are RAII and closed/freed on drop, e g, when a PCM struct is dropped, snd_pcm_close is called.

  • To read and write buffers, call the io_* methods. It will return a separate struct from which you can read or write, and which can also be used for mmap (if supported by the driver).

  • Error handling - most alsa-lib functions can return errors, so the return value from these is a Result.

  • Enumeration of cards, devices etc is done through structs implementing Iterator.

  • Many structs implement Polldescriptors, to combine with poll or mio. (Or just use wait if you don't need that functionality.)

Apache-2.0/MIT license

Dependencies

Reverse deps