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https://github.com/alsa-project/alsa-utils
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alsaucm: add a man page, generated from reStructuredText
Signed-off-by: Antonio Ospite <ao2@ao2.it> Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Antonio Ospite
Takashi Iwai
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commit
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2 changed files with 242 additions and 0 deletions
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bin_PROGRAMS = \
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alsaucm
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if USE_RST2MAN
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man_MANS = alsaucm.1
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endif
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alsaucm_SOURCES = usecase.c
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AM_CPPFLAGS = \
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-Wall -I$(top_srcdir)/include
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alsaucm_LDADD = -lasound
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%.1: %.rst
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rst2man $< > $@
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235
alsaucm/alsaucm.rst
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235
alsaucm/alsaucm.rst
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=========
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alsaucm
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=========
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---------------------
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ALSA Use Case Manager
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---------------------
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:Author: Antonio Ospite <ao2@ao2.it>
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:Date: 2016-09-22
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:Copyright: GPLv2+
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:Manual section: 1
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:Manual group: General Commands Manual
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SYNOPSIS
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========
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*alsaucm* <options> [command]
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DESCRIPTION
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===========
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alsaucm (ALSA Use Case Manager) is a program to use the ALSA `Use Case
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Interface`_ from the command line.
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On complex sound cards, setting up audio routes is not trivial and mixer
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settings can conflict one another preventing the audio card to work at all.
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The ALSA Use Case Manager is a mechanism for controlling complex audio
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hardware establishing a relationship between hardware configurations and
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meaningful use cases that the end-user can relate with.
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The use case manager can also be used to switch between use cases when
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necessary, in a consistent way.
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At a lower level, the use case manager works by configuring the sound card
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ALSA kcontrols to change the hardware digital and analog audio routing to
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match the requested device use case.
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The use case manager kcontrol configurations are stored in easy to modify text
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files. An audio use case can be defined by a **verb** and **device** parameter.
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The verb describes the use case action i.e. a phone call, listening to music,
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recording a conversation etc. The device describes the physical audio capture
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and playback hardware i.e. headphones, phone handset, bluetooth headset, etc.
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OPTIONS
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=======
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Available options:
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**-h**, **--help**
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this help
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**-c**, **--card** `NAME`
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open card NAME
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**-i**, **--interactive**
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interactive mode
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**-b**, **--batch** `FILE`
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batch mode (use ``'-'`` for the stdin input)
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**-n**, **--no-open**
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do not open first card found
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Available commands:
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``open`` `NAME`
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open card NAME.
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valid names are sound card names as listed in ``/usr/share/alsa/ucm``.
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``reset``
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reset sound card to default state.
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``reload``
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reload configuration.
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``listcards``
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list available cards.
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``list`` `IDENTIFIER`
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list command, for items returning two entries (value+comment).
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the value of the `IDENTIFIER` argument can can be:
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- ``_verbs`` - get verb list (in pair verb+comment)
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- ``_devices[/{verb}]`` - get list of supported devices (in pair device+comment)
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- ``_modifiers[/{verb}]`` - get list of supported modifiers (in pair modifier+comment)
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The forms without the trailing ``/{verb}`` are valid only after a specific
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verb has been set.
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``list1`` `IDENTIFIER`
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list command, for lists returning one item per entry.
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the value of the `IDENTIFIER` argument can vary depending on the context,
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it can be:
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- ``TQ[/{verb}]`` - get list of Tone Quality identifiers
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- ``_enadevs`` - get list of enabled devices
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- ``_enamods`` - get list of enabled modifiers
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- ``_supporteddevs/{modifier}|{device}[/{verb}]`` - list of supported devices
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- ``_conflictingdevs/{modifier}|{device}[/{verb}]`` - list of conflicting devices
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``get`` `IDENTIFIER`
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get string value.
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the value of the `IDENTIFIER` argument can can be:
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- ``_verb`` - return current verb
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- ``[=]{NAME}[/[{modifier}|{/device}][/{verb}]]`` (For valid NAMEs look at the
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ALSA `Use Case Interface`_)
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``geti`` `IDENTIFIER`
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get integer value.
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the value of the `IDENTIFIER` argument can can be:
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- ``_devstatus/{device}``
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- ``_modtstaus/{device}``
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``set`` `IDENTIFIER` `VALUE`
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set string value
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The value of the `IDENTIFIER` argument can can be:
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- ``_verb`` - set the verb to `VALUE`
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- ``_enadev`` - enable the device specified by `VALUE`
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- ``_disdev`` - disable the device specified by `VALUE`
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- ``_swdev/{old_device}`` - switche device:
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- disable `old_device` and then enable the device specified by
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`VALUE`
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- if no device was enabled just return
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- ``_enamod`` - enable the modifier specified by `VALUE`
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- ``_dismod`` - disable the modifier specified by `VALUE`
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- ``_swmod/{old_modifier}`` - switch modifier:
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- disable `old_modifier` and then enable the modifier specified by
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`VALUE`
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- if no modifier was enabled just return
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Note that the identifiers referring to devices and modifiers are valid
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only after setting a verb.
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``h``, ``help``
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help
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``q``, ``quit``
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quit
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FILES
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=====
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The master use case files for each supported sound card are in ``/usr/share/alsa/ucm``.
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For example, the master use case file for the `Pandaboard` card is in
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``/usr/share/alsa/ucm/PandaBoard/PandaBoard.conf``, this file lists all the
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supported use cases, e.g.
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::
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SectionUseCase."HiFi" {
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File "hifi"
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Comment "Play HiFi quality Music."
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}
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...
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Each use case defines a _verb, which is described in the file specified in
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the ``File`` directive, like above.
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The ``HiFi`` verb above is described in
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``/usr/share/alsa/ucm/PandaBoard/hifi``.
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For more details on the syntax of UCM files, see the alsa-lib source code:
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http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/ucm/parser.c
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EXAMPLES OF USE
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===============
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Some commands, like for instance ``list _devices``,
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can only work after setting a ``_verb`` in the **same execution**, for
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instance this sequence doesn't work:
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::
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# alsaucm -c bytcr-rt5640 set _verb HiFi
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# alsaucm -c bytcr-rt5640 list _devices
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However this command does:
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::
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# alsaucm -n -b - <<EOM
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open bytcr-rt5640
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set _verb HiFi
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list _devices
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EOM
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An example of setting the `Speaker` device for the `HiFi` verb of the
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`bytcr-rt5640` card:
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::
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# alsaucm -n -b - <<EOM
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open bytcr-rt5640
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reset
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set _verb HiFi
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set _enadev Speaker
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EOM
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SEE ALSO
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========
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* Use Case Interface: http://www.alsa-project.org/alsa-doc/alsa-lib/group__ucm.html
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.. _Use Case Interface: http://www.alsa-project.org/alsa-doc/alsa-lib/group__ucm.html
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BUGS
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====
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None known.
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