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5311099dbd
157
LICENSE.md
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157
LICENSE.md
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### GNU LESSER GENERAL PUBLIC LICENSE
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Version 3, 29 June 2007
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Copyright (C) 2007 Free Software Foundation, Inc.
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<https://fsf.org/>
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Everyone is permitted to copy and distribute verbatim copies of this
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license document, but changing it is not allowed.
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This version of the GNU Lesser General Public License incorporates the
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terms and conditions of version 3 of the GNU General Public License,
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supplemented by the additional permissions listed below.
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#### 0. Additional Definitions.
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As used herein, "this License" refers to version 3 of the GNU Lesser
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General Public License, and the "GNU GPL" refers to version 3 of the
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GNU General Public License.
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"The Library" refers to a covered work governed by this License, other
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than an Application or a Combined Work as defined below.
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An "Application" is any work that makes use of an interface provided
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by the Library, but which is not otherwise based on the Library.
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Defining a subclass of a class defined by the Library is deemed a mode
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of using an interface provided by the Library.
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A "Combined Work" is a work produced by combining or linking an
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Application with the Library. The particular version of the Library
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with which the Combined Work was made is also called the "Linked
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Version".
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The "Minimal Corresponding Source" for a Combined Work means the
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||||
Corresponding Source for the Combined Work, excluding any source code
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||||
for portions of the Combined Work that, considered in isolation, are
|
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based on the Application, and not on the Linked Version.
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The "Corresponding Application Code" for a Combined Work means the
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object code and/or source code for the Application, including any data
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and utility programs needed for reproducing the Combined Work from the
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Application, but excluding the System Libraries of the Combined Work.
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#### 1. Exception to Section 3 of the GNU GPL.
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You may convey a covered work under sections 3 and 4 of this License
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without being bound by section 3 of the GNU GPL.
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|
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#### 2. Conveying Modified Versions.
|
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If you modify a copy of the Library, and, in your modifications, a
|
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facility refers to a function or data to be supplied by an Application
|
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that uses the facility (other than as an argument passed when the
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facility is invoked), then you may convey a copy of the modified
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version:
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- a) under this License, provided that you make a good faith effort
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to ensure that, in the event an Application does not supply the
|
||||
function or data, the facility still operates, and performs
|
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whatever part of its purpose remains meaningful, or
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- b) under the GNU GPL, with none of the additional permissions of
|
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this License applicable to that copy.
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#### 3. Object Code Incorporating Material from Library Header Files.
|
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The object code form of an Application may incorporate material from a
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header file that is part of the Library. You may convey such object
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code under terms of your choice, provided that, if the incorporated
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material is not limited to numerical parameters, data structure
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layouts and accessors, or small macros, inline functions and templates
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(ten or fewer lines in length), you do both of the following:
|
||||
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||||
- a) Give prominent notice with each copy of the object code that
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the Library is used in it and that the Library and its use are
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covered by this License.
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- b) Accompany the object code with a copy of the GNU GPL and this
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license document.
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#### 4. Combined Works.
|
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You may convey a Combined Work under terms of your choice that, taken
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together, effectively do not restrict modification of the portions of
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the Library contained in the Combined Work and reverse engineering for
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debugging such modifications, if you also do each of the following:
|
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- a) Give prominent notice with each copy of the Combined Work that
|
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the Library is used in it and that the Library and its use are
|
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covered by this License.
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- b) Accompany the Combined Work with a copy of the GNU GPL and this
|
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license document.
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- c) For a Combined Work that displays copyright notices during
|
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execution, include the copyright notice for the Library among
|
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these notices, as well as a reference directing the user to the
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copies of the GNU GPL and this license document.
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- d) Do one of the following:
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- 0) Convey the Minimal Corresponding Source under the terms of
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this License, and the Corresponding Application Code in a form
|
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suitable for, and under terms that permit, the user to
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recombine or relink the Application with a modified version of
|
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the Linked Version to produce a modified Combined Work, in the
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manner specified by section 6 of the GNU GPL for conveying
|
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Corresponding Source.
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- 1) Use a suitable shared library mechanism for linking with
|
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the Library. A suitable mechanism is one that (a) uses at run
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time a copy of the Library already present on the user's
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computer system, and (b) will operate properly with a modified
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version of the Library that is interface-compatible with the
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Linked Version.
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- e) Provide Installation Information, but only if you would
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otherwise be required to provide such information under section 6
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of the GNU GPL, and only to the extent that such information is
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necessary to install and execute a modified version of the
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Combined Work produced by recombining or relinking the Application
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with a modified version of the Linked Version. (If you use option
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4d0, the Installation Information must accompany the Minimal
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||||
Corresponding Source and Corresponding Application Code. If you
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use option 4d1, you must provide the Installation Information in
|
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the manner specified by section 6 of the GNU GPL for conveying
|
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Corresponding Source.)
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#### 5. Combined Libraries.
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You may place library facilities that are a work based on the Library
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side by side in a single library together with other library
|
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facilities that are not Applications and are not covered by this
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License, and convey such a combined library under terms of your
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choice, if you do both of the following:
|
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|
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- a) Accompany the combined library with a copy of the same work
|
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based on the Library, uncombined with any other library
|
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facilities, conveyed under the terms of this License.
|
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- b) Give prominent notice with the combined library that part of it
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is a work based on the Library, and explaining where to find the
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accompanying uncombined form of the same work.
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#### 6. Revised Versions of the GNU Lesser General Public License.
|
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The Free Software Foundation may publish revised and/or new versions
|
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of the GNU Lesser General Public License from time to time. Such new
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versions will be similar in spirit to the present version, but may
|
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differ in detail to address new problems or concerns.
|
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Each version is given a distinguishing version number. If the Library
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as you received it specifies that a certain numbered version of the
|
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GNU Lesser General Public License "or any later version" applies to
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it, you have the option of following the terms and conditions either
|
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of that published version or of any later version published by the
|
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Free Software Foundation. If the Library as you received it does not
|
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specify a version number of the GNU Lesser General Public License, you
|
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may choose any version of the GNU Lesser General Public License ever
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published by the Free Software Foundation.
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|
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If the Library as you received it specifies that a proxy can decide
|
||||
whether future versions of the GNU Lesser General Public License shall
|
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apply, that proxy's public statement of acceptance of any version is
|
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permanent authorization for you to choose that version for the
|
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Library.
|
56
README.md
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56
README.md
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# stream.sh
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A quick-and-dirty solution for streaming audio over TCP/IP between
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Linux computers with ALSA.
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# usage
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The architecture consists of a server (Computer With Speakers) and
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a client (Computer With Crappier Speakers But We Have Media On It).
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The script is self-contained, so you can distribute the same version
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to client and server computers.
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On the server, run
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```
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./stream.sh server 1337
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```
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... and then, on the client, run
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```
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./stream.sh set
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./stream.sh client 10.21.37.1 1337
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```
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This is enough to get you started, you should start hearing audio
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from your local applications on the remote computer. By default,
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stream.sh uses WAVE in a RIFF container - this provides a high
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quality, low-latency solution. In case your network isn't fast
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enough to support raw audio data, you can specify a codec and
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bitrate:
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```
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./stream.sh client 10.21.37.1 1337 libopus 64
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```
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# debugging
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stream.sh has a built-in benchmarking functionality that tries to
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guess the correct timings for your hardware. If this is inaccurate
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and you hear pops, or the audio drops off completely every ~60s,
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you may want to run
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```
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./stream.sh benchmark ffmpeg
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```
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and modify the delay variable in the `USER-CONFIGURABLE VARIABLES`
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section of stream.sh
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# building
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```
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./pack.sh > stream.sh
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```
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51
bench.sh
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51
bench.sh
Executable file
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#!/bin/bash
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if [[ "$1" == '' ]]; then
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if [[ "$0" != *"bench.sh" ]]; then
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echo "usage: $0 bench <path_to_ffmpeg>"
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else
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echo "usage: $0 <path_to_ffmpeg>"
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fi
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exit 1
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fi
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res=()
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uwu=0
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function count() {
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x=0
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for (( i=0; i<${#res[@]}; i++ )); do
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x=$((x+${res[i]}))
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done
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uwu=$((uwu+$((x/${#res[@]}))))
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echo "$((x/${#res[@]}))"
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res=()
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}
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function invoke() {
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( time $@ ) 2>&1 | grep -a real | grep -aPoh "[^(real\t0m\.)].*[^s]"
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}
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echo "FFmpeg launch benchmark"
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echo -n "Burst... "
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for (( i=0; i<100; i++ )); do
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res+=($(invoke $1))
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done
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count
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echo -n "Set sleep... "
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for (( i=0; i<25; i++ )); do
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res+=($(invoke $1))
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sleep 0.1
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done
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count
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echo -n "Random sleep... "
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for (( i=0; i<25; i++ )); do
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res+=($(invoke $1))
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sleep 0.$((RANDOM%10))
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done
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count
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echo "yeah, try $((uwu/3))"
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65
client.sh
Executable file
65
client.sh
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#!/bin/bash
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# USER-CONFIGURABLE VARIABLES
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len=60
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delay=030
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ffmpeg_bin=ffmpeg
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# ---
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function log() {
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echo "[$(date "+%T")] $1"
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}
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function stream() {
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$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 $port
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}
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function stream_wave() {
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$ffmpeg_bin -re -f alsa -channels 2 -sample_rate 44100 -i hw:Loopback,1,0 -t $1 -f wav - 2>$tmp | nc $ip $port
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}
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function stream_cont() {
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$stream $len & sleep $len.$delay
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}
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function rolling_rocks() {
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while true; do
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if [[ "$(cat $tmp | grep -a "Input/output error")" != '' ]]; then
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rm $tmp
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$stream $((len-1)).9 &
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log 'Hit a "Device Busy" error, consider increasing sleep delay!'
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fi
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sleep 0.1
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done
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}
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if [[ "$1" == '' ]]; then
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if [[ "$0" != *"client.sh" ]]; then
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echo "usage: $0 client <ip> <port> [fmt] [kbps]"
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else
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echo "usage: $0 <ip> <port> [fmt] [kbps]"
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fi
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exit 1
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fi
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if [[ "$3" != '' ]]; then
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fmt="$3"
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stream="stream"
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log 'Container: matroska'
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else
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fmt="wav"
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stream="stream_wave"
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log 'Container: RIFF'
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fi
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if [[ "$4" != '' ]]; then
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bitrate="$4"
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else
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bitrate="128k"
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fi
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ip=$1
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port=$2
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tmp=$(mktemp)
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rolling_rocks &
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log "Loop length: ${len}s"
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log "Post-loop delay: ${delay}ms"
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log 'Starting main loop...'
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while true; do
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stream_cont
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done
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45
pack.sh
Executable file
45
pack.sh
Executable file
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#!/bin/bash
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function parse() {
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sed -E 's@#!/bin/bash@@g;s/^/\t/g'
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}
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echo -n '#!/bin/bash
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function bench() {'
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cat bench.sh | parse
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echo -n '}
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function client() {'
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cat client.sh | parse
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echo -n '}
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function server() {'
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cat server.sh | parse
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echo -n '}
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function server_core() {'
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cat server_core.sh | parse
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echo -n '}
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function _set() {'
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cat set.sh | parse
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echo -n '}
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function _unset() {'
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cat unset.sh | parse
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echo '}
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if [[ "$1" == "server_core" ]]; then
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server_core
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elif [[ "$1" == "" ]]; then
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echo "usage: $0 <client|server|bench|set|unset> [params]"
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elif [[ "$1" == "client" ]]; then
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client $2 $3 $4 $5 $6
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elif [[ "$1" == "bench" ]]; then
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bench $2
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elif [[ "$1" == "server" ]]; then
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server $2
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elif [[ "$1" == "set" ]]; then
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_set
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elif [[ "$1" == "unset" ]]; then
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_unset
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fi'
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15
server.sh
Executable file
15
server.sh
Executable file
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#!/bin/bash
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if [[ "$1" == '' ]]; then
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if [[ "$0" != *"server.sh" ]]; then
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echo "usage: $0 server <port>"
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else
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echo "usage: $0 <port>"
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fi
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exit 1
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fi
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if [[ "$0" == *"server.sh" ]]; then
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ncat -k -l -p $1 -c "./server_core.sh"
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else
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ncat -k -l -p $1 -c "$0 server_core"
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fi
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8
server_core.sh
Executable file
8
server_core.sh
Executable file
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#!/bin/bash
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read -n4 container
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if [[ "$container" == "RIFF" ]]; then
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(echo -n "$container"; cat -) | aplay -f cd -
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else
|
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(echo -n "$container"; cat -) | ffmpeg -re -i - -f wav - | aplay -f cd -
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fi
|
5
set.sh
Executable file
5
set.sh
Executable file
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#!/bin/bash
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sudo rmmod snd-aloop
|
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sudo modprobe snd-aloop pcm_substreams=1
|
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[[ -f ~/.asoundrc ]] && cp ~/.asoundrc ~/.asoundrc_orig
|
||||
echo 'pcm.!default { type plug slave.pcm "hw:Loopback,0,0" }' > ~/.asoundrc
|
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