Koichiro IWAO
7 years ago
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metalefty
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The latest version of this document can be found at wiki.
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* https://github.com/neutrinolabs/xrdp/wiki/How-to-set-up-audio-redirection
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# Overview
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xrdp supports audio redirection using PulseAudio, which is a sound system for
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POSIX operating systems. Server to client redirection is compliant to Remote
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Desktop Procol standard [[MS-RDPEA]](https://msdn.microsoft.com/en-us/library/cc240933.aspx)
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but client to server redirection implementation is proprietary. Accordingly,
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server to client redirection is available with many of RDP clients including
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Microsoft client but client to server redirection requires NeutrinoRDP client,
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not available with other clients.
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Here is how to build pulseaudio modules for your distro, so you can have audio
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support through xrdp.
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# Prerequisites
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Prepare xrdp source in your home directory. Of course, you can choose another
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directory.
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cd ~
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git clone https://github.com/neutrinolabs/xrdp.git
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In this instruction, pulseaudio version is **10.0**. Replace the version number
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in this instruction if your environment has different versions. You can find
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out your pulseaudio version executing the following command:
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pulseaudio --version
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# How to build
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## Debian 9 / Ubuntu
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This instruction also should be applicable to Ubuntu family.
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### Prerequisites
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Some build tools and package development tools are required. Make sure install
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the tools.
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apt install build-essential dpkg-dev
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### Prepare & build
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Install pulseaudio and requisite packages to build pulseaudio.
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apt install pulseaudio
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apt build-dep pulseaudio
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Fetch the pulseaudio source . You'll see `pulseaudio-10.0` directory in your
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current directory.
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apt source pulseaudio
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Enter into the directory and build the pulseaudio package.
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cd pulseaudio-10.0
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dpkg-buildpackage -rfakeroot -uc -b
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Enter into pulse directory in xrdp source.
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cd ~/xrdp/sesman/chansrv/pulse
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nano Makefile
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Edit the `Makefile`. Replace `/tmp/pulseaudio-10.0` with your pulseaudio source
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directory.
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```diff
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diff --git a/sesman/chansrv/pulse/Makefile b/sesman/chansrv/pulse/Makefile
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index 74977221..395ef0a0 100644
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--- a/sesman/chansrv/pulse/Makefile
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+++ b/sesman/chansrv/pulse/Makefile
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@@ -3,7 +3,7 @@
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#
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# change this to your pulseaudio source directory
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-PULSE_DIR = /tmp/pulseaudio-10.0
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+PULSE_DIR = /home/debian/pulseaudio-10.0
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CFLAGS = -Wall -O2 -I$(PULSE_DIR) -I$(PULSE_DIR)/src -DHAVE_CONFIG_H -fPIC
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all: module-xrdp-sink.so module-xrdp-source.so
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```
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Finally, let's make. You'll have two .so files `module-xrdp-sink.so` and
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`module-xrdp-source.so`.
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make
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## Other distro
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First off, find out your pulseaudio version using `pulseaudio --version`
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command. Download the tarball of the pulseaudio version that you have.
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* https://freedesktop.org/software/pulseaudio/releases/
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After downloading the tarball, extact the tarball and `cd` into the source
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directory, then run `./configure`.
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wget https://freedesktop.org/software/pulseaudio/releases/pulseaudio-10.0.tar.xz
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tar xf pulseaudio-10.0.tar.gz
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cd pulseaudio-10.0
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./configure
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If additional packages are required to run `./configure`, install requisite
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packages depending on your environment.
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Next, enter into pulse directory in xrdp source and replace `/tmp/pulseaudio-10.0`
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in `Makefile` with your pulseaudio source directory.
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cd ~/xrdp/sesman/chansrv/pulse
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nano Makefile
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Finally, let's make. You'll have two .so files `module-xrdp-sink.so` and
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`module-xrdp-source.so`.
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make
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# Install
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Install process is not distro specific except for install destination. Install
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built two .so files into the pulseaudio modules directory. Typically,
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`/usr/lib/pulse-10.0/modules` for Debian, `/usr/lib64/pulse-10.0/modules` for
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CentOS 7. Other distro might have different path. Find out the right path for
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your distro.
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Look into the directory with `ls` command. You'll see lots of `module-*.so`
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files. There's the place!
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cd ~/xrdp/sesman/chansrv/pulse
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for f in *.so; do install -s -m 644 $f /usr/lib/pulse-10.0/modules; done
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This command is equivalent to following:
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install -s -m 644 module-xrdp-sink.so /usr/lib/pulse-10.0/modules
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install -s -m 644 module-xrdp-source.so /usr/lib/pulse-10.0/modules
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Well done! Pulseaudio modules should be properly built and installed.
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# See if it works
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To see if it works, run `pavumeter` in the xrdp session. Playback any YouTube
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video in Firefox. You'll see "Showing signal levels of **xrdp sink**" and
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volume meter moving.
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@ -1,79 +0,0 @@
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Pulse audio notes.
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to see what version of PA is on your machine
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pulseaudio --version
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IMA ADPCM
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To build xrdp pulse sink,
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get the pulse source that most closely matches your version on
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your machine. Get the source from
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http://freedesktop.org/software/pulseaudio/releases/
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run ./configure after extracting. I don't think you need to build it.
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edit Makefile to point to your pulse source directory.
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PA always respawning
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To stop its respawning habit, open /etc/pulse/client.conf, change
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autospawn = yes to autospawn = no, and set daemon-binary to /bin/true.
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Make sure these lines are uncommented, like this:
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autospawn = no
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daemon-binary = /bin/true
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xfreerdp -a 24 -z --plugin rdpsnd --data alsa:hw:0,0 -- 127.0.0.1
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to get ./configure on pulse source to run
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apt-get install libsndfile1-dev
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apt-get install libspeex-dev
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apt-get install libspeexdsp-dev
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alsamixer
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apt-get install alsa-utils
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/etc/asound.conf
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---------------------------------
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pcm.pulse {
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type pulse
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}
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ctl.pulse {
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type pulse
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}
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pcm.!default {
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type pulse
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}
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ctl.!default {
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type pulse
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}
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---------------------------------
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/etc/pulse/default.pa
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---------------------------------
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.nofail
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.fail
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load-module module-augment-properties
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#load-module module-alsa-sink device=hw:0
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#load-module module-alsa-source device=hw:0
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#load-module module-pipe-sink
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#load-module module-pipe-source
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#load-module module-null-sink
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load-module module-xrdp-sink
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load-module module-native-protocol-unix
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#load-module module-udev-detect tsched=0
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---------------------------------
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To see a list of sinks
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pacmd list-sinks
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To manually load a sink
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pactl load-module module-xrdp-sink.so sink_name=test
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@ -1,77 +0,0 @@
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--------------------------------------
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Building pulseaudio modules for xrdp
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--------------------------------------
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o append the following line to /etc/apt/sources.list
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deb-src http://archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse
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this is what my /etc/apt/sources.list looks like
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deb http://packages.linuxmint.com/ maya main upstream import
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deb http://archive.ubuntu.com/ubuntu/ precise main restricted universe multiverse
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deb http://archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse
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deb http://security.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse
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deb http://archive.canonical.com/ubuntu/ precise partner
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deb http://packages.medibuntu.org/ precise free non-free
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#deb http://archive.getdeb.net/ubuntu precise-getdeb apps
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#deb http://archive.getdeb.net/ubuntu precise-getdeb games
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deb http://drbl.sourceforge.net/drbl-core drbl stable
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deb-src http://archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse
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NOTE: If you get an error message that goes something like this:
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E: You must put some 'source' URIs in your sources.list
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try running the following command first:
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apt-get source pulseaudio
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o run these commands in your home directory
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cd
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sudo apt-get install dpkg-dev
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apt-get source pulseaudio
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sudo apt-get build-dep pulseaudio
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cd pulseaudio-1.1
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dpkg-buildpackage -rfakeroot -uc -b
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o edit Makefile and point PULSE_DIR to ~/pulseaudio<version> dir
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o run make; the outputs will be
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module-xrdp-sink.so
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module-xrdp-source.so
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o sudo cp module-xrdp-sink.so /usr/lib/pulse-<version>/modules
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sudo cp module-xrdp-source.so /usr/lib/pulse-<version>/modules
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note: on a 64bit machine use lib64 instead of lib
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o if you build xrdp with --enable-load_pulse_modules, then the above modules
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will get loaded automatically when xrdp starts. However if --enable-load_pulse_modules
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is not used, then you need to edit /etc/pulse/default.pa and insert the following
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two lines into it:
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load-module module-xrdp-sink
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load-module module-xrdp-source
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--------------------------------------
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To test sound/microphone redirection
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--------------------------------------
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o install gnome sound recorder or your favorite sound recorder
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o mplayer -ao pulse <audio file>
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o sudo apt-get install pavucontrol
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o in another window run pavucontrol and you should see xrdp-sink in use
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o to enable pulseaudio log
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o edit /etc/pulse/daemon.conf and set
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log-target = syslog
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log-level = notice
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o pulseaudio --kill
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o log output will be in /var/log/syslog or /var/log/messages
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