PJSIP Android Builder

Easily build PJSIP with: OpenSSL, Opus and G.729 (without Intel IPP) for Android.

Purpose

I needed an easily replicable build system to build PJSIP http://www.pjsip.org/ native library with NDK for Android. So, I created an Ubuntu docker container (22.04 LTS) and wrote some scripts to download, install all the requirements needed to make it a complete build environment and some automated build scripts. If you want to contribute, your help is really appreciated :)

Support - PJSIP 2.13+

Using Android API 28. Default versions included:

• Android Cmd Tools: 8512546
• Android NKD: r26c
• OpenSSL: 3.1.2 (Uses NDK Level 28)
• Opus: 1.3.1
• bcg729: 1.1.1
• Swig: 4.0.2

Setup

You can install everything on your local machine, or (the way I do) use an Ubuntu Docker container and mount an external volume with this repo. E.g.:

docker run -it --name pjsip-builder -v /path/to/host/repo:/home ubuntu bash

Configuration

1. Clone this repo on your machine or in the mounted volume inside your container.
2. Properly configure the config.conf file. It's possible to configure libraries versions and build settings by editing it. The settings in the Support section above have been tested. Please read the comments in the file for more details. Now single libraries can be configured to be compiled with PJSIP without further editing, just enable the switches in the config file.
3. In the config.conf file there are some toggles to apply patches (fixed_callid). See the respective README for more info.

Prepare Environment

1. Execute ./prepare-build-system
2. If everything goes well you should see all the compiled libraries (opus, openssl, bcg729) in the output folder.

Build PJSIP

After you have successfully set up everything, to build PJSIP execute ./build

The script is going to create a new folder inside the output named pjsip-output-build organized as follows:

pjsip-output-build
 |-- logs/  contains the full build log for each target architecture
 |-- lib/   contains the compiled libraries for each target architecture
 |-- java/   contains PJSUA Java wrapper to work with the library

If something goes wrong during the compilation of a particular target architecture, the main script will be terminated and you can see the full log in ./pjsip-output-build/logs/<arch>.log. So for example if there's an error for x86, you can see the full log in ./pjsip-output-build/logs/x86.log

x86 Relocation

To fix the issue, popping up in recent NDK versions. I've used the fix proposed by @alexmelnikov here, but I have applied it only for x86 arch.

Build Libraries only

This project has separate independent script to build only single libraries:

• Bcg729
• OpenSSL
• Opus

If you want to build a single library, or just change it's version, you can disable everything except the library you want to build from the config.conf file and specify the version you want (of course you would also need the NDK). Then execute the prepare-build-system script. If the environment is ready you can also just run the lib dedicated script.

License

Copyright (C) 2015-2022 VoiSmart Srl

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.