PulseAudio-
Introduction to PulseAudio
PulseAudio is a sound system for
POSIX OSes, meaning that it is a proxy for sound applications. It
allows you to do advanced operations on your sound data as it
passes between your application and your hardware. Things like
transferring the audio to a different machine, changing the sample
format or channel count and mixing several sounds into one are
easily achieved using a sound server.
This package is known to build and work properly using an LFS-7.7
platform.
Package Information
PulseAudio Dependencies
Required
JSON-C-0.12 and libsndfile-1.0.25
Recommended
alsa-lib-1.0.28, D-Bus-1.8.16,
GLib-2.42.1, libcap-2.24
with PAM, OpenSSL-1.0.2, Speex-1.2rc2 and Xorg
Libraries
Optional
Avahi-0.6.31, BlueZ-5.28
(runtime), Check-0.9.14, ConsoleKit-0.4.6 (runtime), GConf-3.2.6,
GTK+-3.14.8, libsamplerate-0.1.8, SBC-1.3 (Bluetooth support),
Valgrind-3.10.1, FFTW, JACK, libasyncns,
LIRC, ORC,
TDB,
WebRTC AudioProcessing and XEN
User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/pulseaudio
Installation of PulseAudio
Install PulseAudio by running the
following commands:
find . -name "Makefile.in" | xargs sed -i "s|(libdir)/@PACKAGE@|(libdir)/pulse|" &&
./configure --prefix=/usr \
--sysconfdir=/etc \
--localstatedir=/var \
--disable-bluez4 \
--disable-rpath \
--with-module-dir=/usr/lib/pulse/modules &&
make
To test the results, issue: make
check.
Now, as the root user:
make install
While still as the root user,
remove the D-Bus configuration
file for the system wide daemon to avoid creating unnecessary
system users and groups:
rm /etc/dbus-1/system.d/pulseaudio-system.conf
Command Explanations
find . -name Makefile.in
...: This sed changes the build system to install
PulseAudio private libraries into
/usr/lib/pulse instead of
/usr/lib/pulseaudio.
--disable-bluez4: This
switch disables support for BlueZ
version 4 in favour of BlueZ
version 5 since the latter also installs compatibility library for
the earlier version.
--disable-rpath: This
switch prevents linker from adding a hardcoded runtime path to the
installed programs and libraries.
--with-module-dir=/usr/lib/pulse/modules:
This parameter ensures that PulseAudio modules are installed in
/usr/lib/pulse/modules instead of
/usr/lib/pulse-/modules.
Configuring PulseAudio
Config
Files
There are system wide configuration files: /etc/pulse/daemon.conf, /etc/pulse/client.conf, /etc/pulse/default.pa, and user configuration
files with the same names in ~/.config/pulse. User configuration files take
precedence over system wide ones.
Configuration Information
The default configuration files allow to set up a working
installation, except that you need to remove a reference to
Console-Kit if it is not installed. For example, issue the
following command as the root
user:
sed '/load-module module-console-kit/s/^/#/' \
-i /etc/pulse/default.pa
You may also have to configure the audio system. You may start
pulseaudio in command line mode
using pulseaudio
-C. You can then list various informations and
change some settings. See man
pulse-cli-syntax.
Contents
Installed Programs:
esdcompat, pacat, pacmd, pactl, padsp,
pamon (symlink), paplay (symlink), parec (symlink), parecord
(symlink), pasuspender, pax11publish, pulseaudio,
start-pulseaudio-kde and start-pulseaudio-x11
Installed Libraries:
libpulsecore-.so,
libpulse-mainloop-glib.so, libpulse-simple.so and
libpulse.so
Installed Directories:
/etc/pulse, /usr/include/pulse,
/usr/lib/{cmake/PulseAudio,pulse}, /usr/libexec/pulse, and
/usr/share/pulseaudio
Short Descriptions
|
esdcompat
|
is the PulseAudio ESD
wrapper script.
|
|
pacat
|
plays back or records raw or encoded audio streams on a
PulseAudio sound server.
|
|
pacmd
|
is a tool used to reconfigure a PulseAudio sound server during
runtime.
|
|
pactl
|
is used to control a running PulseAudio sound server.
|
|
padsp
|
is the PulseAudio OSS
Wrapper.
|
|
pamon
|
is a symbolic link to pacat.
|
|
paplay
|
is used to play audio files on a PulseAudio sound server.
|
|
parec
|
is a symbolic link to pacat.
|
|
parecord
|
is a symbolic link to pacat.
|
|
pasuspender
|
is a tool that can be used to tell a local PulseAudio sound server to
temporarily suspend access to the audio devices, to allow
other applications to access them directly.
|
|
pax11publish
|
is the PulseAudio X11
Credential Utility.
|
|
pulseaudio
|
is a networked low-latency sound server for Linux.
|
|
start-pulseaudio-kde
|
Starts PulseAudio and
loads module-device-manager to use KDE routing policies.
|
|
start-pulseaudio-x11
|
starts PulseAudio and
registers it to the X11 session manager.
|
Last updated on 2015-02-27 19:21:33 -0500