mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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586 lines
25 KiB
XML
586 lines
25 KiB
XML
<?xml version="1.0"?><!--*-nxml-*-->
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<!DOCTYPE manpage SYSTEM "xmltoman.dtd">
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<?xml-stylesheet type="text/xsl" href="xmltoman.xsl" ?>
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<!--
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This file is part of PulseAudio.
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PulseAudio is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
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-->
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<manpage name="pulse-daemon.conf" section="5" desc="PulseAudio daemon configuration file">
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<synopsis>
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<p><file>~/.config/pulse/daemon.conf</file></p>
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<p><file>~/.config/pulse/daemon.conf.d/*.conf</file></p>
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<p><file>@PA_DEFAULT_CONFIG_DIR@/daemon.conf</file></p>
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<p><file>@PA_DEFAULT_CONFIG_DIR@/daemon.conf.d/*.conf</file></p>
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</synopsis>
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<description>
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<p>The PulseAudio sound server reads configuration directives from
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a configuration file on startup. If the per-user file
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<file>~/.config/pulse/daemon.conf</file> exists, it is used, otherwise the
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system configuration file <file>@PA_DEFAULT_CONFIG_DIR@/daemon.conf</file>
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is used. In addition to those main files, configuration directives can also
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be put in files under directories
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<file>~/.config/pulse/daemon.conf.d/</file> and
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<file>@PA_DEFAULT_CONFIG_DIR@/daemon.conf.d/</file>. Those files have to
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have the .conf file name extension, but otherwise the file names can be
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chosen freely. The files under daemon.conf.d are processed in alphabetical
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order. In case the same option is set in multiple files, the last file to
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set an option overrides earlier files. The main daemon.conf file is
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processed first, so options set in files under daemon.conf.d override the
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main file.</p>
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<p>Please note that the server also reads a configuration script on
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startup. See <manref name="default.pa" section="5"/>.</p>
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<p>The configuration file is a simple collection of variable
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declarations. If the configuration file parser encounters either ;
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or # it ignores the rest of the line until its end.</p>
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<p>For the settings that take a boolean argument the values
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<opt>true</opt>, <opt>yes</opt>, <opt>on</opt> and <opt>1</opt>
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are equivalent, resp. <opt>false</opt>, <opt>no</opt>,
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<opt>off</opt>, <opt>0</opt>.</p>
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</description>
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<section name="General Directives">
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<option>
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<p><opt>daemonize=</opt> Daemonize after startup. Takes a
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boolean value, defaults to <opt>no</opt>. The <opt>--daemonize</opt>
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command line option takes precedence.</p>
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</option>
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<option>
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<p><opt>fail=</opt> Fail to start up if any of the directives
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in the configuration script <file>default.pa</file>
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fail. Takes a boolean argument, defaults to <opt>yes</opt>. The <opt>--fail</opt> command line
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option takes precedence.</p>
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</option>
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<option>
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<p><opt>allow-module-loading=</opt> Allow/disallow module
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loading after startup. This is a security feature that if
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disabled makes sure that no further modules may be loaded into
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the PulseAudio server after startup completed. It is recommended
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to disable this when <opt>system-instance</opt> is
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enabled. Please note that certain features like automatic
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hot-plug support will not work if this option is enabled. Takes
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a boolean argument, defaults to <opt>yes</opt>. The
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<opt>--disallow-module-loading</opt> command line option takes
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precedence.</p>
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</option>
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<option>
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<p><opt>allow-exit=</opt> Allow/disallow exit on user
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request. Defaults to <opt>yes</opt>.</p>
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</option>
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<option>
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<p><opt>resample-method=</opt> The resampling algorithm to
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use. Use one of <opt>src-sinc-best-quality</opt>,
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<opt>src-sinc-medium-quality</opt>, <opt>src-sinc-fastest</opt>,
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<opt>src-zero-order-hold</opt>, <opt>src-linear</opt>,
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<opt>trivial</opt>, <opt>speex-float-N</opt>,
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<opt>speex-fixed-N</opt>, <opt>ffmpeg</opt>, <opt>soxr-mq</opt>,
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<opt>soxr-hq</opt>, <opt>soxr-vhq</opt>. See the
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documentation of libsamplerate and speex for explanations of the
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different src- and speex- methods, respectively. The method
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<opt>trivial</opt> is the most basic algorithm implemented. If
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you're tight on CPU consider using this. On the other hand it has
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the worst quality of them all. The Speex resamplers take an
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integer quality setting in the range 0..10 (bad...good). They
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exist in two flavours: <opt>fixed</opt> and <opt>float</opt>. The former uses fixed point
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numbers, the latter relies on floating point numbers. On most
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desktop CPUs the float point resampler is a lot faster, and it
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also offers slightly better quality. The soxr-family methods
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are based on libsoxr, a resampler library from the SoX sound processing utility.
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The mq variant has the best performance of the three. The hq is more expensive
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and, according to SoX developers, is considered the best choice for audio of up to 16 bits per sample.
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The vhq variant has more precision than hq and is more suitable for larger samples. The Soxr resamplers
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generally offer better quality at less CPU compared to other resamplers, such as speex.
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The downside is that they can add a significant delay to the output
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(usually up to around 20 ms, in rare cases more).
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See the output of <opt>dump-resample-methods</opt> for a complete list of all
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available resamplers. Defaults to <opt>speex-float-1</opt>. The
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<opt>--resample-method</opt> command line option takes precedence.
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Note that some modules overwrite or allow overwriting of the
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resampler to use.</p>
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</option>
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<option>
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<p><opt>avoid-resampling=</opt> If set, try to configure the
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device to avoid resampling. This only works on devices which
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support reconfiguring their rate, and when no other streams are
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already playing or capturing audio. The device will also not be
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configured to a rate less than the default and alternate sample
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rates.</p>
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</option>
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<option>
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<p><opt>enable-remixing=</opt> If disabled never upmix or
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downmix channels to different channel maps. Instead, do a simple
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name-based matching only. Defaults to <opt>yes</opt>.
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There is no known valid use case for setting this option to
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<opt>no</opt>, therefore, this option is deprecated and may be
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removed in a future version of PulseAudio.</p>
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</option>
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<option>
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<p><opt>remixing-use-all-sink-channels=</opt> If enabled, use
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all sink channels when remixing. Otherwise, remix to the minimal
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set of sink channels needed to reproduce all of the source
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channels. (This has no effect on LFE remixing.) Defaults to
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<opt>yes</opt>.</p>
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</option>
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<option>
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<p><opt>enable-lfe-remixing=</opt> This is a way to set
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<opt>remixing-produce-lfe</opt> and <opt>remixing-consume-lfe</opt>
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to the same value at once. This option only exists for backward
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compatibility and may be removed in a future version of PulseAudio.</p>
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</option>
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<option>
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<p><opt>remixing-produce-lfe=</opt> If enabled, and the sink input
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does not have the LFE channel, synthesize the output LFE channel
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as a (lowpass-filtered, if <opt>lfe-crossover-freq</opt> is not 0)
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average of all input channels. Also, when <opt>lfe-crossover-freq</opt>
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is not 0, filter out low frequencies from other channels while
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producing a synthetic LFE output. If disabled, the output LFE channel
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will only get a signal when an input LFE channel is available as well.
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Defaults to <opt>no</opt>.</p>
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</option>
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<option>
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<p><opt>remixing-consume-lfe=</opt> If enabled, and the sink does not
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have an LFE channel, redirect the input LFE channel (if any) to other
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channels. If disabled, the input LFE channel will remain unused unless
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the sink has the LFE channel as well. Defaults to <opt>no</opt>.</p>
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</option>
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<option>
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<p><opt>lfe-crossover-freq=</opt> The crossover frequency (in Hz) for the
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LFE filter. Set it to 0 to disable the LFE filter. Defaults to 0.</p>
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</option>
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<option>
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<p><opt>use-pid-file=</opt> Create a PID file in the runtime directory
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(<file>$XDG_RUNTIME_DIR/pulse/pid</file>). If this is enabled you may
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use commands like <opt>--kill</opt> or <opt>--check</opt>. If
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you are planning to start more than one PulseAudio process per
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user, you better disable this option since it effectively
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disables multiple instances. Takes a boolean argument, defaults
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to <opt>yes</opt>. The <opt>--use-pid-file</opt> command line
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option takes precedence.</p>
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</option>
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<option>
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<p><opt>cpu-limit=</opt> If disabled do not install the CPU load
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limiter, even on platforms where it is supported. This option is
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useful when debugging/profiling PulseAudio to disable disturbing
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SIGXCPU signals. Takes a boolean argument, defaults to
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<opt>no</opt>. The <opt>--no-cpu-limit</opt> command line
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argument takes precedence.</p>
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</option>
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<option>
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<p><opt>system-instance=</opt> Run the daemon as system-wide
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instance, requires root privileges. Takes a boolean argument,
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defaults to <opt>no</opt>. The <opt>--system</opt> command line
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argument takes precedence.</p>
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</option>
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<option>
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<p><opt>local-server-type=</opt> Please don't use this option if
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you don't have to! This option is currently only useful when you
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want D-Bus clients to use a remote server. This option may be
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removed in future versions. If you only want to run PulseAudio
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in the system mode, use the <opt>system-instance</opt> option.
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This option takes one of <opt>user</opt>, <opt>system</opt> or
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<opt>none</opt> as the argument. This is essentially a duplicate
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for the <opt>system-instance</opt> option. The difference is the
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<opt>none</opt> option, which is useful when you want to use a
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remote server with D-Bus clients. If both this and
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<opt>system-instance</opt> are defined, this option takes
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precedence. Defaults to whatever the <opt>system-instance</opt>
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is set.</p>
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</option>
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<option>
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<p><opt>enable-shm=</opt> Enable data transfer via POSIX
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or memfd shared memory. Takes a boolean argument, defaults to
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<opt>yes</opt>. The <opt>--disable-shm</opt> command line
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argument takes precedence.</p>
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</option>
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<option>
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<p><opt>enable-memfd=</opt>. Enable memfd shared memory. Takes
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a boolean argument, defaults to <opt>yes</opt>.</p>
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</option>
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<option>
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<p><opt>shm-size-bytes=</opt> Sets the shared memory segment
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size for the daemon, in bytes. If left unspecified or is set to 0
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it will default to some system-specific default, usually 64
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MiB. Please note that usually there is no need to change this
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value, unless you are running an OS kernel that does not do
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memory overcommit.</p>
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</option>
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<option>
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<p><opt>lock-memory=</opt> Locks the entire PulseAudio process
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into memory. While this might increase drop-out safety when used
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in conjunction with real-time scheduling this takes away a lot
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of memory from other processes and might hence considerably slow
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down your system. Defaults to <opt>no</opt>.</p>
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</option>
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<option>
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<p><opt>flat-volumes=</opt> Enable 'flat' volumes, i.e. where
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possible let the sink volume equal the maximum of the volumes of
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the inputs connected to it. Takes a boolean argument, defaults
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to <opt>no</opt>.</p>
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</option>
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<option>
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<p><opt>rescue-streams=</opt> Enable rescuing of streams if the
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used sink or source becomes unavailable. Takes a boolean argument.
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If set to <opt>yes</opt>, pulseaudio will try to move the streams
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from a sink or source that becomes unavailable to the default sink
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or source. If set to <opt>no</opt>, streams will be killed if the
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corresponding sink or source disappears. Defaults to <opt>yes</opt>.</p>
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</option>
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</section>
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<section name="Scheduling">
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<option>
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<p><opt>high-priority=</opt> Renice the daemon after startup to
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become a high-priority process. This a good idea if you
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experience drop-outs during playback. However, this is a certain
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security issue, since it works when called SUID root only, or
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RLIMIT_NICE is used. root is dropped immediately after gaining
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the nice level on startup, thus it is presumably safe. See
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<manref section="1" name="pulseaudio"/> for more
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information. Takes a boolean argument, defaults to <opt>yes</opt>. The <opt>--high-priority</opt>
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command line option takes precedence.</p>
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</option>
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<option>
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<p><opt>realtime-scheduling=</opt> Try to acquire SCHED_FIFO
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scheduling for the IO threads. The same security concerns as
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mentioned above apply. However, if PA enters an endless loop,
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realtime scheduling causes a system lockup. Thus, realtime
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scheduling should only be enabled on trusted machines for
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now. Please note that only the IO threads of PulseAudio are made
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real-time. The controlling thread is left a normally scheduled
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thread. Thus enabling the high-priority option is orthogonal.
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See <manref section="1" name="pulseaudio"/> for more
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information. Takes a boolean argument, defaults to <opt>yes</opt>. The
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<opt>--realtime</opt> command line option takes precedence.</p>
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</option>
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<option>
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<p><opt>realtime-priority=</opt> The realtime priority to
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acquire, if <opt>realtime-scheduling</opt> is enabled. Note: JACK uses 10
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by default, 9 for clients. Thus it is recommended to choose the
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PulseAudio real-time priorities lower. Some PulseAudio threads
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might choose a priority a little lower or higher than the
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specified value. Defaults to <opt>5</opt>.</p>
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</option>
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<option>
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<p><opt>nice-level=</opt> The nice level to acquire for the
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daemon, if <opt>high-priority</opt> is enabled. Note: on some
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distributions X11 uses -10 by default. Defaults to -11.</p>
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</option>
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</section>
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<section name="Idle Times">
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<option>
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<p><opt>exit-idle-time=</opt> Terminate the daemon after the
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last client quit and this time in seconds passed. Use a negative value to
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disable this feature. Defaults to 20. The <opt>--exit-idle-time</opt>
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command line option takes precedence.</p>
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<p>When PulseAudio runs in the per-user mode and detects a login
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session, then any positive value will be reset to 0 so that PulseAudio
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will terminate immediately on logout. A positive value therefore has
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effect only in environments where there's no support for login session
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tracking (or if the user is logged in without a session spawned, a.k.a.
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lingering). A negative value can still be used to disable any automatic
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exit.</p>
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<p>When PulseAudio runs in the system mode, automatic exit is always
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disabled, so this option does nothing.</p>
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</option>
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<option>
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<p><opt>scache-idle-time=</opt> Unload autoloaded sample cache
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entries after being idle for this time in seconds. Defaults to
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20. The <opt>--scache-idle-time</opt> command line option takes
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precedence.</p>
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</option>
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</section>
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<section name="Paths">
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<option>
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<p><opt>dl-search-path=</opt> The path where to look for dynamic
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shared objects (DSOs/plugins). You may specify more than one
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path separated by colons. The default path depends on compile
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time settings. The <opt>--dl-search-path</opt> command line
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option takes precedence. </p>
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</option>
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<option>
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<p><opt>default-script-file=</opt> The default configuration
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script file to load. Specify an empty string for not loading a
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default script file. The default behaviour is to load
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<file>~/.config/pulse/default.pa</file>, and if that file does not
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exist fall back to the system wide installed version
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<file>@PA_DEFAULT_CONFIG_DIR@/default.pa</file>. If run in system-wide
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mode the file <file>@PA_DEFAULT_CONFIG_DIR@/system.pa</file> is used
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instead. If <opt>-n</opt> is passed on the command line
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or <opt>default-script-file=</opt> is disabled the default
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configuration script is ignored.</p>
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</option>
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<option>
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<p><opt>load-default-script-file=</opt> Load the default
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configuration script file as specified
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in <opt>default-script-file=</opt>. Defaults to <opt>yes</opt>.</p>
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</option>
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|
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</section>
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<section name="Logging">
|
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<option>
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<p><opt>log-target=</opt> The default log target. Use either
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<opt>stderr</opt>, <opt>syslog</opt>, <opt>journal</opt> (optional),
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<opt>auto</opt>, <opt>file:PATH</opt> or <opt>newfile:PATH</opt>. On traditional
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systems <opt>auto</opt> is equivalent to <opt>syslog</opt>. On systemd-enabled
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systems, auto is equivalent to <opt>journal</opt>, in case <opt>daemonize</opt>
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is enabled, and to <opt>stderr</opt> otherwise. If set to <opt>file:PATH</opt>,
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logging is directed to the file indicated by PATH. <opt>newfile:PATH</opt> is
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otherwise the same as <opt>file:PATH</opt>, but existing files are never
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overwritten. If the specified file already exists, a suffix is added to
|
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the file name to avoid overwriting. Defaults to <opt>auto</opt>. The
|
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<opt>--log-target</opt> command line option takes precedence.</p>
|
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</option>
|
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|
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<option>
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<p><opt>log-level=</opt> Log level, one of <opt>debug</opt>,
|
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<opt>info</opt>, <opt>notice</opt>, <opt>warning</opt>,
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<opt>error</opt>. Log messages with a lower log level than
|
|
specified here are not logged. Defaults to
|
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<opt>notice</opt>. The <opt>--log-level</opt> command line
|
|
option takes precedence. The <opt>-v</opt> command line option
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might alter this setting.</p>
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</option>
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|
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<option>
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<p><opt>log-meta=</opt> With each logged message log the code
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location the message was generated from. Defaults to
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<opt>no</opt>.</p>
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</option>
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|
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<option>
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<p><opt>log-time=</opt> With each logged message log the
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relative time since startup. Defaults to <opt>no</opt>.</p>
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</option>
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<option>
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<p><opt>log-backtrace=</opt> When greater than 0, with each
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logged message log a code stack trace up the specified
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number of stack frames. Defaults to <opt>0</opt>.</p>
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</option>
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</section>
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<section name="Resource Limits">
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<p>See <manref name="getrlimit" section="2"/> for
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more information. Set to -1 if PulseAudio shall not touch the resource
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limit. Not all resource limits are available on all operating
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systems.</p>
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|
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<option>
|
|
<p><opt>rlimit-as</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-rss</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-core</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-data</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-fsize</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-nofile</opt> Defaults to 256.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-stack</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-nproc</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-locks</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-sigpending</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-msgqueue</opt> Defaults to -1.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-memlock</opt> Defaults to 16 KiB. Please note
|
|
that the JACK client libraries may require more locked
|
|
memory.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-nice</opt> Defaults to 31. Please make sure that
|
|
the default nice level as configured with <opt>nice-level</opt>
|
|
fits in this resource limit, if <opt>high-priority</opt> is
|
|
enabled.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-rtprio</opt> Defaults to 9. Please make sure that
|
|
the default real-time priority level as configured with
|
|
<opt>realtime-priority=</opt> fits in this resource limit, if
|
|
<opt>realtime-scheduling</opt> is enabled. The JACK client
|
|
libraries require a real-time priority of 9 by default.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>rlimit-rttime</opt> Defaults to 1000000.</p>
|
|
</option>
|
|
|
|
</section>
|
|
|
|
<section name="Default Device Settings">
|
|
|
|
<p>Most drivers try to open the audio device with these settings
|
|
and then fall back to lower settings. The default settings are CD
|
|
quality: 16bit native endian, 2 channels, 44100 Hz sampling.</p>
|
|
|
|
<option>
|
|
<p><opt>default-sample-format=</opt> The default sampling
|
|
format. See
|
|
https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/SupportedAudioFormats/
|
|
for possible values.</p>
|
|
</option>
|
|
|
|
<option>
|
|
<p><opt>default-sample-rate=</opt> The default sample frequency.</p>
|
|
</option>
|
|
|
|
<option>
|
|
<p><opt>default-sample-channels</opt> The default number of channels.</p>
|
|
</option>
|
|
|
|
<option>
|
|
<p><opt>default-channel-map</opt> The default channel map.</p>
|
|
</option>
|
|
|
|
<option>
|
|
<p><opt>alternate-sample-rate</opt> The alternate sample
|
|
frequency. Sinks and sources will use either the
|
|
default-sample-rate value or this alternate value, typically 44.1
|
|
or 48kHz. Switching between default and alternate values is
|
|
enabled only when the sinks/sources are suspended. This option
|
|
is ignored in passthrough mode where the stream rate will be used.
|
|
If set to the same value as the default sample rate, this feature is
|
|
disabled.</p>
|
|
</option>
|
|
|
|
</section>
|
|
|
|
<section name="Default Fragment Settings">
|
|
|
|
<p>Some hardware drivers require the hardware playback buffer to
|
|
be subdivided into several fragments. It is possible to change
|
|
these buffer metrics for machines with high scheduling
|
|
latencies. Not all possible values that may be configured here are
|
|
available in all hardware. The driver will find the nearest
|
|
setting supported. Modern drivers that support timer-based
|
|
scheduling ignore these options.</p>
|
|
|
|
<option>
|
|
<p><opt>default-fragments=</opt> The default number of
|
|
fragments. Defaults to 4.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>default-fragment-size-msec=</opt>The duration of a
|
|
single fragment. Defaults to 25ms (i.e. the total buffer is thus
|
|
100ms long).</p>
|
|
</option>
|
|
|
|
</section>
|
|
|
|
<section name="Default Deferred Volume Settings">
|
|
|
|
<p>With the flat volume feature enabled, the sink HW volume is set
|
|
to the same level as the highest volume input stream. Any other streams
|
|
(with lower volumes) have the appropriate adjustment applied in SW to
|
|
bring them to the correct overall level. Sadly hardware mixer changes
|
|
cannot be timed accurately and thus this change of volumes can sometimes
|
|
cause the resulting output sound to be momentarily too loud or too soft.
|
|
So to ensure SW and HW volumes are applied concurrently without any
|
|
glitches, their application needs to be synchronized. The sink
|
|
implementation needs to support deferred volumes. The following
|
|
parameters can be used to refine the process.</p>
|
|
|
|
<option>
|
|
<p><opt>enable-deferred-volume=</opt> Enable deferred volume for the sinks that
|
|
support it. This feature is enabled by default.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>deferred-volume-safety-margin-usec=</opt> The amount of time (in
|
|
usec) by which the HW volume increases are delayed and HW volume
|
|
decreases are advanced. Defaults to 8000 usec.</p>
|
|
</option>
|
|
<option>
|
|
<p><opt>deferred-volume-extra-delay-usec=</opt> The amount of time (in usec)
|
|
by which HW volume changes are delayed. Negative values are also allowed.
|
|
Defaults to 0.</p>
|
|
</option>
|
|
|
|
</section>
|
|
|
|
<section name="Authors">
|
|
<p>The PulseAudio Developers <@PACKAGE_BUGREPORT@>; PulseAudio is available from <url href="@PACKAGE_URL@"/></p>
|
|
</section>
|
|
|
|
<section name="See also">
|
|
<p>
|
|
<manref name="pulse-client.conf" section="5"/>, <manref name="default.pa" section="5"/>, <manref name="pulseaudio" section="1"/>, <manref name="pacmd" section="1"/>
|
|
</p>
|
|
</section>
|
|
|
|
</manpage>
|