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Marijn Suijten 8db4dff2c5 bluetooth: Set up hardware gain control if init volume is received late 
Originally written for A2DP this rework of that patch enables late-bound
hardware volume control on HFP and HSP.  As per the specification the
headphones (where gain control for both speaker and microphone could
happen in hardware on the peer) are supposed to send initial values for
these before the SCO connection is created; these `AT+VG[MS]` commands
are also used to determine support for it.  PA uses this information in
`add_{sink,source}` to attach hardware volume callbacks, _if_ it is
supported.  Otherwise PA performs the attenuation in software.

Unfortunately headphones like the WH-1000XM3's connect to A2DP
initially and only send `AT+VGS` (microphone hardware gain is not
supported) _during_ SCO connection when the user switches to the HFP
profile afterwards; the callbacks set up dynamically in
`rfcomm_io_callback` are written after the sink and source have been
created (`add_{sink,source}`), leaving them without hardware volume
callbacks and with software volume when adjusted on the PA side.  (The
headphones can still send volume updates resulting in abrupt changes if
software and peer volume differ.  Furthermore the same attenuation is
applied twice - once in PA software, once on the peer).

To solve this problem we simply check whether the callbacks have been
attached whenever the peer sends a volume change, and if not attach the
callbacks to the sink/source and reset software volume.

Fixes: d510ddc7f ("bluetooth: Perform software attenuation until HF/HS reports gain control")
Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/528>
2021-03-17 22:57:38 +01:00
.gitlab doc: Add some contributor guidelines 2021-01-04 15:30:38 +00:00
coverity build: Add Coverity scan model 2017-03-06 08:22:33 +01:00
doc message-params: Allow parameter strings to contain escaped curly braces 2020-12-03 14:41:39 +00:00
doxygen build-sys: drop autotools build system 2021-03-15 18:25:06 +00:00
man build-sys: drop autotools build system 2021-03-15 18:25:06 +00:00
po i18n: Update .pot and .po files 2021-03-08 16:28:01 +02:00
scripts build-sys: meson: fix meson dist version 2021-03-15 18:25:06 +00:00
shell-completion fix handling of symbolic port names in zsh completion 2021-02-15 15:06:35 +00:00
src bluetooth: Set up hardware gain control if init volume is received late 2021-03-17 22:57:38 +01:00
vala meson: Install vala apis 2019-06-08 11:57:00 +02:00
.gitignore gitignore: Add install/ for local prefixed installs 2021-01-19 10:57:17 -05:00
.gitlab-ci.yml build-sys: meson: fix meson dist version 2021-03-15 18:25:06 +00:00
.mailmap add a .mailmap file for git shortlog 2009-02-04 22:41:45 +01:00
CODE_OF_CONDUCT.md Adopt a Code of Conduct 2018-09-26 02:39:00 +00:00
CONTRIBUTING.md doc: Add some contributor guidelines 2021-01-04 15:30:38 +00:00
git-version-gen git-version-gen: Avoid further processing when tarball-version is present 2015-10-20 16:55:23 +02:00
GPL * rename "LICENSE" to "LGPL" 2006-04-20 12:33:00 +00:00
LGPL * rename "LICENSE" to "LGPL" 2006-04-20 12:33:00 +00:00
libpulse-mainloop-glib.pc.in build: Fix static linking 2012-07-17 11:05:34 +05:30
libpulse-simple.pc.in build: Fix static linking 2012-07-17 11:05:34 +05:30
libpulse.pc.in build: Fix static linking 2012-07-17 11:05:34 +05:30
LICENSE qpaeq: change license from AGPL to LGPL v2.1 2017-09-19 21:29:44 +03:00
meson.build build-sys: meson: fix meson dist version 2021-03-15 18:25:06 +00:00
meson_options.txt build-sys: meson: support elogind alternative for module-systemd-login 2021-02-12 20:34:11 +03:00
NEWS Update NEWS 2021-01-16 20:18:58 +02:00
PROTOCOL protocol-native: add message sending capability 2020-12-03 14:41:39 +00:00
pulseaudio-text.svg merge 'lennart' branch back into trunk. 2007-10-28 19:13:50 +00:00
pulseaudio.supp Add a Valgrind suppression file 2014-09-21 11:00:51 +03:00
pulseaudio.svg Add PulseAudio logo to tree. 2006-08-28 06:25:41 +00:00
PulseAudioConfig.cmake.in build-sys: Provide a simple CMake Config setup (similar to pkgconfig) 2011-10-19 23:49:23 +01:00
PulseAudioConfigVersion.cmake.in build-sys: Provide a simple CMake Config setup (similar to pkgconfig) 2011-10-19 23:49:23 +01:00
README build-sys: drop autotools build system 2021-03-15 18:25:06 +00:00
todo build-sys: Stop using symdef headers for modules 2017-12-12 12:58:52 +05:30

README 

PULSEAUDIO SOUND SERVER

WEB SITE:
	http://pulseaudio.org/

GIT:
	https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git

GitLab:
	https://gitlab.freedesktop.org/pulseaudio/pulseaudio

MAILING LIST:
	http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss

GIT COMMITS MAILING LIST:
	http://lists.freedesktop.org/mailman/listinfo/pulseaudio-commits

TRAC/BUGZILLA TICKET CHANGES MAILING LIST:
	http://lists.freedesktop.org/mailman/listinfo/pulseaudio-bugs

IRC:
	#pulseaudio on irc.freenode.org

FRESHMEAT:
	http://freshmeat.net/projects/pulseaudio/

OHLOH:
	http://www.ohloh.net/projects/4038

AUTHORS:
	Several

HACKING:
	In order to run pulseaudio from the build dir:
	  meson build
	  meson compile -C build
	  build/src/daemon/pulseaudio -n -F build/src/daemon/default.pa -p $(pwd)/build/src/modules/

SPELLING:
        PulseAudio