2010/8/24 Liam Girdwood <lrg@xxxxxxxxxxxxxxx> > This patch series follows on from the RFC and adds sound card hardware Use > Case > 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 > over > 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 :- > > > http://git.slimlogic.co.uk/cgi-bin/cgit.cgi/alsa-ucm-conf.git/tree/cards/SDP4430/hifi > > 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 > Playback". > > 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. > > > http://git.slimlogic.co.uk/cgi-bin/cgit.cgi/alsa-lib.git/commit/?h=ucm-upstream&id=15d5f619deba20f87075e7c711e6331115fd836d > > 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, .... ) _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
