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James Bottomley f22cfa8f81 bluetooth: add support for mSBC codec 
Adding processing support for the mSBC codec is somewhat problematic,
because, although it is a SBC codec, the a2dp handling can't simply be
reused because the codec is used on an eSCO link with transparent
data, meaning the transmission unit has to be 48 bytes (fragmenting
the codec packets) and reassembly and boundary detection is required
to be done by the implementation.  Therefore we have to implement
separate render and push routines for msbc that do this fragmentation.

Fragmentation is done by emulating circular buffers.  The receive
(push) buffer is easy, since the mSBC packet size is 60, simply have a
buffer of this size in the sbc_info area where the fragments are
reassembled.  Once we have a full 60 bytes, decode and restart from
zero.  The send (render) buffer is more problematic, since the
transmit must be done from contiguous memory.  This means that the
buffer must be the lowest common multiple of the transmission unit and
the packet size.  This value is 240 since 240/48 == 5 and 240/60 == 4.
So the buffer pointers are reset at 240 which is a whole number of
both rendered packets and eSCO transmission units.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/507>
2021-04-05 15:43:32 +00:00
.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 bluetooth: update messaging api reference 2021-03-27 11:18:22 +00:00
doxygen message-params: clean up 2021-03-27 11:18:22 +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: add support for mSBC codec 2021-04-05 15:43:32 +00:00
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 bluetooth: add support for mSBC codec 2021-04-05 15:43:32 +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