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LICENSE.md
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157
LICENSE.md
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||||||
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### GNU LESSER GENERAL PUBLIC LICENSE
|
||||||
|
|
||||||
|
Version 3, 29 June 2007
|
||||||
|
|
||||||
|
Copyright (C) 2007 Free Software Foundation, Inc.
|
||||||
|
<https://fsf.org/>
|
||||||
|
|
||||||
|
Everyone is permitted to copy and distribute verbatim copies of this
|
||||||
|
license document, but changing it is not allowed.
|
||||||
|
|
||||||
|
This version of the GNU Lesser General Public License incorporates the
|
||||||
|
terms and conditions of version 3 of the GNU General Public License,
|
||||||
|
supplemented by the additional permissions listed below.
|
||||||
|
|
||||||
|
#### 0. Additional Definitions.
|
||||||
|
|
||||||
|
As used herein, "this License" refers to version 3 of the GNU Lesser
|
||||||
|
General Public License, and the "GNU GPL" refers to version 3 of the
|
||||||
|
GNU General Public License.
|
||||||
|
|
||||||
|
"The Library" refers to a covered work governed by this License, other
|
||||||
|
than an Application or a Combined Work as defined below.
|
||||||
|
|
||||||
|
An "Application" is any work that makes use of an interface provided
|
||||||
|
by the Library, but which is not otherwise based on the Library.
|
||||||
|
Defining a subclass of a class defined by the Library is deemed a mode
|
||||||
|
of using an interface provided by the Library.
|
||||||
|
|
||||||
|
A "Combined Work" is a work produced by combining or linking an
|
||||||
|
Application with the Library. The particular version of the Library
|
||||||
|
with which the Combined Work was made is also called the "Linked
|
||||||
|
Version".
|
||||||
|
|
||||||
|
The "Minimal Corresponding Source" for a Combined Work means the
|
||||||
|
Corresponding Source for the Combined Work, excluding any source code
|
||||||
|
for portions of the Combined Work that, considered in isolation, are
|
||||||
|
based on the Application, and not on the Linked Version.
|
||||||
|
|
||||||
|
The "Corresponding Application Code" for a Combined Work means the
|
||||||
|
object code and/or source code for the Application, including any data
|
||||||
|
and utility programs needed for reproducing the Combined Work from the
|
||||||
|
Application, but excluding the System Libraries of the Combined Work.
|
||||||
|
|
||||||
|
#### 1. Exception to Section 3 of the GNU GPL.
|
||||||
|
|
||||||
|
You may convey a covered work under sections 3 and 4 of this License
|
||||||
|
without being bound by section 3 of the GNU GPL.
|
||||||
|
|
||||||
|
#### 2. Conveying Modified Versions.
|
||||||
|
|
||||||
|
If you modify a copy of the Library, and, in your modifications, a
|
||||||
|
facility refers to a function or data to be supplied by an Application
|
||||||
|
that uses the facility (other than as an argument passed when the
|
||||||
|
facility is invoked), then you may convey a copy of the modified
|
||||||
|
version:
|
||||||
|
|
||||||
|
- a) under this License, provided that you make a good faith effort
|
||||||
|
to ensure that, in the event an Application does not supply the
|
||||||
|
function or data, the facility still operates, and performs
|
||||||
|
whatever part of its purpose remains meaningful, or
|
||||||
|
- b) under the GNU GPL, with none of the additional permissions of
|
||||||
|
this License applicable to that copy.
|
||||||
|
|
||||||
|
#### 3. Object Code Incorporating Material from Library Header Files.
|
||||||
|
|
||||||
|
The object code form of an Application may incorporate material from a
|
||||||
|
header file that is part of the Library. You may convey such object
|
||||||
|
code under terms of your choice, provided that, if the incorporated
|
||||||
|
material is not limited to numerical parameters, data structure
|
||||||
|
layouts and accessors, or small macros, inline functions and templates
|
||||||
|
(ten or fewer lines in length), you do both of the following:
|
||||||
|
|
||||||
|
- a) Give prominent notice with each copy of the object code that
|
||||||
|
the Library is used in it and that the Library and its use are
|
||||||
|
covered by this License.
|
||||||
|
- b) Accompany the object code with a copy of the GNU GPL and this
|
||||||
|
license document.
|
||||||
|
|
||||||
|
#### 4. Combined Works.
|
||||||
|
|
||||||
|
You may convey a Combined Work under terms of your choice that, taken
|
||||||
|
together, effectively do not restrict modification of the portions of
|
||||||
|
the Library contained in the Combined Work and reverse engineering for
|
||||||
|
debugging such modifications, if you also do each of the following:
|
||||||
|
|
||||||
|
- a) Give prominent notice with each copy of the Combined Work that
|
||||||
|
the Library is used in it and that the Library and its use are
|
||||||
|
covered by this License.
|
||||||
|
- b) Accompany the Combined Work with a copy of the GNU GPL and this
|
||||||
|
license document.
|
||||||
|
- c) For a Combined Work that displays copyright notices during
|
||||||
|
execution, include the copyright notice for the Library among
|
||||||
|
these notices, as well as a reference directing the user to the
|
||||||
|
copies of the GNU GPL and this license document.
|
||||||
|
- d) Do one of the following:
|
||||||
|
- 0) Convey the Minimal Corresponding Source under the terms of
|
||||||
|
this License, and the Corresponding Application Code in a form
|
||||||
|
suitable for, and under terms that permit, the user to
|
||||||
|
recombine or relink the Application with a modified version of
|
||||||
|
the Linked Version to produce a modified Combined Work, in the
|
||||||
|
manner specified by section 6 of the GNU GPL for conveying
|
||||||
|
Corresponding Source.
|
||||||
|
- 1) Use a suitable shared library mechanism for linking with
|
||||||
|
the Library. A suitable mechanism is one that (a) uses at run
|
||||||
|
time a copy of the Library already present on the user's
|
||||||
|
computer system, and (b) will operate properly with a modified
|
||||||
|
version of the Library that is interface-compatible with the
|
||||||
|
Linked Version.
|
||||||
|
- e) Provide Installation Information, but only if you would
|
||||||
|
otherwise be required to provide such information under section 6
|
||||||
|
of the GNU GPL, and only to the extent that such information is
|
||||||
|
necessary to install and execute a modified version of the
|
||||||
|
Combined Work produced by recombining or relinking the Application
|
||||||
|
with a modified version of the Linked Version. (If you use option
|
||||||
|
4d0, the Installation Information must accompany the Minimal
|
||||||
|
Corresponding Source and Corresponding Application Code. If you
|
||||||
|
use option 4d1, you must provide the Installation Information in
|
||||||
|
the manner specified by section 6 of the GNU GPL for conveying
|
||||||
|
Corresponding Source.)
|
||||||
|
|
||||||
|
#### 5. Combined Libraries.
|
||||||
|
|
||||||
|
You may place library facilities that are a work based on the Library
|
||||||
|
side by side in a single library together with other library
|
||||||
|
facilities that are not Applications and are not covered by this
|
||||||
|
License, and convey such a combined library under terms of your
|
||||||
|
choice, if you do both of the following:
|
||||||
|
|
||||||
|
- a) Accompany the combined library with a copy of the same work
|
||||||
|
based on the Library, uncombined with any other library
|
||||||
|
facilities, conveyed under the terms of this License.
|
||||||
|
- b) Give prominent notice with the combined library that part of it
|
||||||
|
is a work based on the Library, and explaining where to find the
|
||||||
|
accompanying uncombined form of the same work.
|
||||||
|
|
||||||
|
#### 6. Revised Versions of the GNU Lesser General Public License.
|
||||||
|
|
||||||
|
The Free Software Foundation may publish revised and/or new versions
|
||||||
|
of the GNU Lesser General Public License from time to time. Such new
|
||||||
|
versions will be similar in spirit to the present version, but may
|
||||||
|
differ in detail to address new problems or concerns.
|
||||||
|
|
||||||
|
Each version is given a distinguishing version number. If the Library
|
||||||
|
as you received it specifies that a certain numbered version of the
|
||||||
|
GNU Lesser General Public License "or any later version" applies to
|
||||||
|
it, you have the option of following the terms and conditions either
|
||||||
|
of that published version or of any later version published by the
|
||||||
|
Free Software Foundation. If the Library as you received it does not
|
||||||
|
specify a version number of the GNU Lesser General Public License, you
|
||||||
|
may choose any version of the GNU Lesser General Public License ever
|
||||||
|
published by the Free Software Foundation.
|
||||||
|
|
||||||
|
If the Library as you received it specifies that a proxy can decide
|
||||||
|
whether future versions of the GNU Lesser General Public License shall
|
||||||
|
apply, that proxy's public statement of acceptance of any version is
|
||||||
|
permanent authorization for you to choose that version for the
|
||||||
|
Library.
|
56
README.md
Normal file
56
README.md
Normal file
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|
||||||
|
# stream.sh
|
||||||
|
|
||||||
|
A quick-and-dirty solution for streaming audio over TCP/IP between
|
||||||
|
Linux computers with ALSA.
|
||||||
|
|
||||||
|
# usage
|
||||||
|
|
||||||
|
The architecture consists of a server (Computer With Speakers) and
|
||||||
|
a client (Computer With Crappier Speakers But We Have Media On It).
|
||||||
|
The script is self-contained, so you can distribute the same version
|
||||||
|
to client and server computers.
|
||||||
|
|
||||||
|
On the server, run
|
||||||
|
|
||||||
|
```
|
||||||
|
./stream.sh server 1337
|
||||||
|
```
|
||||||
|
|
||||||
|
... and then, on the client, run
|
||||||
|
|
||||||
|
```
|
||||||
|
./stream.sh set
|
||||||
|
./stream.sh client 10.21.37.1 1337
|
||||||
|
```
|
||||||
|
|
||||||
|
This is enough to get you started, you should start hearing audio
|
||||||
|
from your local applications on the remote computer. By default,
|
||||||
|
stream.sh uses WAVE in a RIFF container - this provides a high
|
||||||
|
quality, low-latency solution. In case your network isn't fast
|
||||||
|
enough to support raw audio data, you can specify a codec and
|
||||||
|
bitrate:
|
||||||
|
|
||||||
|
```
|
||||||
|
./stream.sh client 10.21.37.1 1337 libopus 64
|
||||||
|
```
|
||||||
|
|
||||||
|
# debugging
|
||||||
|
|
||||||
|
stream.sh has a built-in benchmarking functionality that tries to
|
||||||
|
guess the correct timings for your hardware. If this is inaccurate
|
||||||
|
and you hear pops, or the audio drops off completely every ~60s,
|
||||||
|
you may want to run
|
||||||
|
|
||||||
|
```
|
||||||
|
./stream.sh benchmark ffmpeg
|
||||||
|
```
|
||||||
|
|
||||||
|
and modify the delay variable in the `USER-CONFIGURABLE VARIABLES`
|
||||||
|
section of stream.sh
|
||||||
|
|
||||||
|
|
||||||
|
# building
|
||||||
|
|
||||||
|
```
|
||||||
|
./pack.sh > stream.sh
|
||||||
|
```
|
51
bench.sh
Executable file
51
bench.sh
Executable file
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|
||||||
|
#!/bin/bash
|
||||||
|
if [[ "$1" == '' ]]; then
|
||||||
|
if [[ "$0" != *"bench.sh" ]]; then
|
||||||
|
echo "usage: $0 bench <path_to_ffmpeg>"
|
||||||
|
else
|
||||||
|
echo "usage: $0 <path_to_ffmpeg>"
|
||||||
|
fi
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
res=()
|
||||||
|
uwu=0
|
||||||
|
|
||||||
|
function count() {
|
||||||
|
x=0
|
||||||
|
for (( i=0; i<${#res[@]}; i++ )); do
|
||||||
|
x=$((x+${res[i]}))
|
||||||
|
done
|
||||||
|
uwu=$((uwu+$((x/${#res[@]}))))
|
||||||
|
echo "$((x/${#res[@]}))"
|
||||||
|
res=()
|
||||||
|
}
|
||||||
|
|
||||||
|
function invoke() {
|
||||||
|
( time $@ ) 2>&1 | grep -a real | grep -aPoh "[^(real\t0m\.)].*[^s]"
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
echo "FFmpeg launch benchmark"
|
||||||
|
echo -n "Burst... "
|
||||||
|
|
||||||
|
for (( i=0; i<100; i++ )); do
|
||||||
|
res+=($(invoke $1))
|
||||||
|
done
|
||||||
|
count
|
||||||
|
|
||||||
|
echo -n "Set sleep... "
|
||||||
|
for (( i=0; i<25; i++ )); do
|
||||||
|
res+=($(invoke $1))
|
||||||
|
sleep 0.1
|
||||||
|
done
|
||||||
|
count
|
||||||
|
|
||||||
|
echo -n "Random sleep... "
|
||||||
|
for (( i=0; i<25; i++ )); do
|
||||||
|
res+=($(invoke $1))
|
||||||
|
sleep 0.$((RANDOM%10))
|
||||||
|
done
|
||||||
|
count
|
||||||
|
|
||||||
|
echo "yeah, try $((uwu/3))"
|
65
client.sh
Executable file
65
client.sh
Executable file
|
@ -0,0 +1,65 @@
|
||||||
|
#!/bin/bash
|
||||||
|
# USER-CONFIGURABLE VARIABLES
|
||||||
|
len=60
|
||||||
|
delay=030
|
||||||
|
ffmpeg_bin=ffmpeg
|
||||||
|
# ---
|
||||||
|
|
||||||
|
|
||||||
|
function log() {
|
||||||
|
echo "[$(date "+%T")] $1"
|
||||||
|
}
|
||||||
|
function stream() {
|
||||||
|
$ffmpeg_bin -re -f alsa -channels 2 -sample_rate 44100 -i hw:Loopback,1,0 -t $1 -f matroska -acodec $fmt -b:a $bitrate - 2>$tmp | nc $ip $port
|
||||||
|
}
|
||||||
|
function stream_wave() {
|
||||||
|
$ffmpeg_bin -re -f alsa -channels 2 -sample_rate 44100 -i hw:Loopback,1,0 -t $1 -f wav - 2>$tmp | nc $ip $port
|
||||||
|
}
|
||||||
|
function stream_cont() {
|
||||||
|
$stream $len & sleep $len.$delay
|
||||||
|
}
|
||||||
|
function rolling_rocks() {
|
||||||
|
while true; do
|
||||||
|
if [[ "$(cat $tmp | grep -a "Input/output error")" != '' ]]; then
|
||||||
|
rm $tmp
|
||||||
|
$stream $((len-1)).9 &
|
||||||
|
log 'Hit a "Device Busy" error, consider increasing sleep delay!'
|
||||||
|
fi
|
||||||
|
sleep 0.1
|
||||||
|
done
|
||||||
|
}
|
||||||
|
|
||||||
|
if [[ "$1" == '' ]]; then
|
||||||
|
if [[ "$0" != *"client.sh" ]]; then
|
||||||
|
echo "usage: $0 client <ip> <port> [fmt] [kbps]"
|
||||||
|
else
|
||||||
|
echo "usage: $0 <ip> <port> [fmt] [kbps]"
|
||||||
|
fi
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
if [[ "$3" != '' ]]; then
|
||||||
|
fmt="$3"
|
||||||
|
stream="stream"
|
||||||
|
log 'Container: matroska'
|
||||||
|
else
|
||||||
|
fmt="wav"
|
||||||
|
stream="stream_wave"
|
||||||
|
log 'Container: RIFF'
|
||||||
|
fi
|
||||||
|
if [[ "$4" != '' ]]; then
|
||||||
|
bitrate="$4"
|
||||||
|
else
|
||||||
|
bitrate="128k"
|
||||||
|
fi
|
||||||
|
|
||||||
|
ip=$1
|
||||||
|
port=$2
|
||||||
|
tmp=$(mktemp)
|
||||||
|
|
||||||
|
rolling_rocks &
|
||||||
|
log "Loop length: ${len}s"
|
||||||
|
log "Post-loop delay: ${delay}ms"
|
||||||
|
log 'Starting main loop...'
|
||||||
|
while true; do
|
||||||
|
stream_cont
|
||||||
|
done
|
45
pack.sh
Executable file
45
pack.sh
Executable file
|
@ -0,0 +1,45 @@
|
||||||
|
#!/bin/bash
|
||||||
|
function parse() {
|
||||||
|
sed -E 's@#!/bin/bash@@g;s/^/\t/g'
|
||||||
|
}
|
||||||
|
|
||||||
|
echo -n '#!/bin/bash
|
||||||
|
function bench() {'
|
||||||
|
cat bench.sh | parse
|
||||||
|
echo -n '}
|
||||||
|
|
||||||
|
function client() {'
|
||||||
|
cat client.sh | parse
|
||||||
|
echo -n '}
|
||||||
|
|
||||||
|
function server() {'
|
||||||
|
cat server.sh | parse
|
||||||
|
echo -n '}
|
||||||
|
|
||||||
|
function server_core() {'
|
||||||
|
cat server_core.sh | parse
|
||||||
|
echo -n '}
|
||||||
|
|
||||||
|
function _set() {'
|
||||||
|
cat set.sh | parse
|
||||||
|
echo -n '}
|
||||||
|
|
||||||
|
function _unset() {'
|
||||||
|
cat unset.sh | parse
|
||||||
|
|
||||||
|
echo '}
|
||||||
|
if [[ "$1" == "server_core" ]]; then
|
||||||
|
server_core
|
||||||
|
elif [[ "$1" == "" ]]; then
|
||||||
|
echo "usage: $0 <client|server|bench|set|unset> [params]"
|
||||||
|
elif [[ "$1" == "client" ]]; then
|
||||||
|
client $2 $3 $4 $5 $6
|
||||||
|
elif [[ "$1" == "bench" ]]; then
|
||||||
|
bench $2
|
||||||
|
elif [[ "$1" == "server" ]]; then
|
||||||
|
server $2
|
||||||
|
elif [[ "$1" == "set" ]]; then
|
||||||
|
_set
|
||||||
|
elif [[ "$1" == "unset" ]]; then
|
||||||
|
_unset
|
||||||
|
fi'
|
15
server.sh
Executable file
15
server.sh
Executable file
|
@ -0,0 +1,15 @@
|
||||||
|
#!/bin/bash
|
||||||
|
if [[ "$1" == '' ]]; then
|
||||||
|
if [[ "$0" != *"server.sh" ]]; then
|
||||||
|
echo "usage: $0 server <port>"
|
||||||
|
else
|
||||||
|
echo "usage: $0 <port>"
|
||||||
|
fi
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
|
||||||
|
if [[ "$0" == *"server.sh" ]]; then
|
||||||
|
ncat -k -l -p $1 -c "./server_core.sh"
|
||||||
|
else
|
||||||
|
ncat -k -l -p $1 -c "$0 server_core"
|
||||||
|
fi
|
8
server_core.sh
Executable file
8
server_core.sh
Executable file
|
@ -0,0 +1,8 @@
|
||||||
|
#!/bin/bash
|
||||||
|
read -n4 container
|
||||||
|
|
||||||
|
if [[ "$container" == "RIFF" ]]; then
|
||||||
|
(echo -n "$container"; cat -) | aplay -f cd -
|
||||||
|
else
|
||||||
|
(echo -n "$container"; cat -) | ffmpeg -re -i - -f wav - | aplay -f cd -
|
||||||
|
fi
|
5
set.sh
Executable file
5
set.sh
Executable file
|
@ -0,0 +1,5 @@
|
||||||
|
#!/bin/bash
|
||||||
|
sudo rmmod snd-aloop
|
||||||
|
sudo modprobe snd-aloop pcm_substreams=1
|
||||||
|
[[ -f ~/.asoundrc ]] && cp ~/.asoundrc ~/.asoundrc_orig
|
||||||
|
echo 'pcm.!default { type plug slave.pcm "hw:Loopback,0,0" }' > ~/.asoundrc
|
Loading…
Reference in a new issue