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The Advanced Linux Sound Architecture (ALSA) - utilities
cf25cf6767
Expand the pre-processor to allow for expanding the definitions,
object attribute references and arithmetic expressions within strings.
With this extension its possible to embedded definitions or attribute
references into topology string objects. For example:
Define {
PCM_NUMBER 1
}
Object.Pipeline {
pcm-playback.0 {
Object.Widget {
copier.1 {
copier_type "host"
}
gain.1 {
Object.Control.mixer.1 {
name 'hw:$[$PCM_NUMBER - 1] Playback Volume'
}
}
Object.Base {
route.1 {
source copier.host.$index.1
sink gain.$index.1
}
}
}
In the example the $[$PCM_NUMBER - 1] would be replaced with the
result of arithmetic expression '1 - 1' in other words '0' , and
$index in all occurrences with index attribute found from pipeline
object. Any non alpha numeric or '_' character are treated as
delimiters for variable names if $[]-notation is not used.
Fixes: https://github.com/alsa-project/alsa-utils/pull/189
Signed-off-by: Jyri Sarha <jyri.sarha@intel.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
|
||
|---|---|---|
| .github/workflows | ||
| alsa-info | ||
| alsaconf | ||
| alsactl | ||
| alsaloop | ||
| alsamixer | ||
| alsaucm | ||
| amidi | ||
| amixer | ||
| aplay | ||
| axfer | ||
| bat | ||
| iecset | ||
| include | ||
| m4 | ||
| po | ||
| seq | ||
| speaker-test | ||
| topology | ||
| utils | ||
| .gitignore | ||
| acinclude.m4 | ||
| ChangeLog | ||
| configure.ac | ||
| COPYING | ||
| gitcompile | ||
| INSTALL | ||
| Makefile.am | ||
| README.md | ||
| TODO | ||
alsa-utils
Advanced Linux Sound Architecture - Utilities
This package contains the command line utilities for the ALSA project. The package can be compiled only with the installed ALSA driver and the ALSA C library (alsa-lib).
| Utility | Description |
|---|---|
| alsaconf | the ALSA driver configurator script |
| alsa-info | a script to gather information about ALSA subsystem |
| alsactl | an utility for soundcard settings management |
| aplay/arecord | an utility for the playback / capture of .wav,.voc,.au files |
| axfer | an utility to transfer audio data frame (enhancement of aplay) |
| amixer | a command line mixer |
| alsamixer | a ncurses mixer |
| amidi | a utility to send/receive sysex dumps or other MIDI data |
| iecset | a utility to show/set the IEC958 status bits |
| speaker-test | a speaker test utility |
| alsaloop | a software loopback for PCM devices |
| alsaucm | Use Case Manager utility |
| alsabat | a sound tester for ALSA sound card driver |
| alsatplg | ALSA topology compiler |
You may give a look for more information about the ALSA project to URL http://www.alsa-project.org.