[alsa-devel] [PATCH 0/3] alsa-lib: UCM - Use Case Manager
superquad.vortex2 at gmail.com
Tue Aug 24 03:23:14 CEST 2010
2010/8/24 Liam Girdwood <lrg at slimlogic.co.uk>
> This patch series follows on from the RFC and adds sound card hardware Use
> Management support to alsa-lib.
> The main features of UCM are :-
> o Abstraction of sound card hardware routing and controls into high level
> use case verbs, devices and modifiers.
> o Discovery of source/sink PCMs for each use case.
> o Discovery of hardware master volume controls for each use case.
> It's intended UCM will provide clients (like pulseaudio) complete control
> hardware signal routing within a sound card without any knowledge of the
> sound card hardware.
> Use case definintions are stored in text files (per sound card) and are now
> divided into three components as descibed in the RFC.
> A working use case definition file can be found here :-
> The three components of a use case are now :-
> 1) Verb (or action). This is mandatory and describes (in terms of ALSA
> control settings) the system use case action. e.g "Phone Call", "Music
> 2) Device. This is also mandatory and describes the audio playback or
> capture device. e.g. "Handset", "Bluetooth", "Headset".
> 3) Modifier. This is optional and is used to modify the current use case
> verb. i.e. The user could be listening to music when an incoming phone
> call requires that a ring tone is played. In this case the use case verb
> would be set to "Music Playback" when the music playback started and
> then the "Tone Playback" modifier could be enabled to play the ring
> tone. The use case verb would then be changed to "Voice Call" if the
> call was accepted.
> Patch 2/3 is a little on the large side so, I've included a link if it gets
> bounced by the list.
> Liam Girdwood (3):
> ucm: header - ALSA Use Case Manager
> ucm: core - Add initial Use Case Manager support.
> ucm: build - add build support for Use Case Manager
> doc/doxygen.cfg.in | 1 +
> include/Makefile.am | 2 +-
> include/use-case.h | 427 +++++++
> src/Makefile.am | 2 +-
> src/use-case.c | 3515
> 5 files changed, 3945 insertions(+), 2 deletions(-)
> create mode 100644 include/use-case.h
> create mode 100644 src/use-case.c
Can the use case manager discover whether the green/pink jack in front panel
can be used independent of those audio jacks in rear panel for HDA-Intel in
desktop pc ?
How about those hardware mixing sound card ?
e.g. emu10k1 allow the user to output stereo to the selected jacks (front ,
rear, .... )
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