[pulseaudio-discuss] [PATCH v2 0/6] ucm: Add support for "JackHWMute"

[Keyon]

On 2015年05月05日 02:03, Tanu Kaskinen wrote:
> Here's v2 for supporting UCM's JackHWMute. What used to be only one
> patch is now six patches, to make the review experience even more
> pleasant. There are several changes beyond just splitting the
> patch into smaller pieces:
>
>   - Instead of creating one jack object per UCM device name, there's
>     now one jack object per kcontrol. The reason for this is that I
>     gained motivation to refactor the jack handling in the traditional
>     mixer code too, and I plan to unify both code bases to use the one
>     jack per kcontrol model, which I think is the most conceptually
>     clear approach (creating one jack object per physical jack would be
>     even better, but Linux doesn't provide the necessary information to
>     implement that).
>
>   - Removed input and output jack separation. UCM doesn't support
>     specifying separate jacks, and pretending otherwise made working
>     with the code more difficult than necessary.
>
>   - JackHWMute can actually contain more than one device (use-case.h
>     documentation patch has been sent to alsa-devel). The code was
>     updated to reflect this.
>
>   - UCM ports are now initialized with unknown availability to match
>     the traditional mixer code. This revealed a couple of bugs, which
>     are now fixed:
>
>      - When the jack state was changed, the order of updating ordinary
>        and hw-mute devices' port availability was "wrong":
>        module-switch-on-port-available didn't like the original order.
>        Doing the updates in a different order made
>        module-switch-on-port-available happy. (There's a wall of text
>        comment in the code to explain the details.)
>
>      - In v1, I did not take pa_alsa_jack.has_control into account when
>        updating port availability. That didn't seem to have much effect
>        when ports were initialized with "yes" availability, but with
>        "unknown" this bug became visible. Now has_control is always
>        considered when updating the port availability.
>
>   - Added pa_alsa_jack_new() and pa_alsa_jack_free(). That's a minor
>     refactoring that I felt was useful.
>
> Tanu Kaskinen (6):
>    alsa: Add pa_alsa_jack_new() and pa_alsa_jack_free()
>    ucm: Don't create separate input and output jacks
>    alsa: Add associations between jacks, UCM devices and UCM ports
>    alsa: Move UCM port availability updating to the mixer code
>    ucm: Create only one jack object per kcontrol
>    ucm: Add support for "JackHWMute"
>
>   src/modules/alsa/alsa-mixer.c       | 138 ++++++++++++++++---
>   src/modules/alsa/alsa-mixer.h       |  10 ++
>   src/modules/alsa/alsa-ucm.c         | 268 +++++++++++++++++++++++++++++++-----
>   src/modules/alsa/alsa-ucm.h         |  16 ++-
>   src/modules/alsa/module-alsa-card.c |  19 +--
>   src/pulsecore/device-port.c         |  14 +-
>   6 files changed, 401 insertions(+), 64 deletions(-)
>
Tested-by: Jie Yang <yang.jie at intel.com>

~Keyon