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librem README

librem is a Audio and video processing media library

• Copyright (C) 2010 - 2019 Creytiv.com
• Copyright (C) 2020 - 2023 Baresip Foundation (https://github.com/baresip)

Features

• Audio buffer
• Audio sample format conversion
• Audio file reader/writer
• Audio mixer
• Audio resampler
• Audio tone generator
• Audio codec (G.711)
• DTMF decoder
• Video mixer
• Video pixel converter
• FIR-filter

Building

librem is using CMake, and libre must be installed before building.

Build with debug enabled

$ cmake -B build
$ cmake --build build -j
$ sudo cmake --install build
$ sudo ldconfig

On some distributions, /usr/local/lib may not be included in ld.so.conf. You can check with grep "/usr/local/lib" /etc/ld.so.conf.d/*.conf and add if necessary:

$ echo "/usr/local/lib" | sudo tee /etc/ld.so.conf.d/libc.conf
$ sudo ldconfig

Build with release

$ cmake -B build -DCMAKE_BUILD_TYPE=Release 
$ cmake --build build -j
$ sudo cmake --install build
$ sudo ldconfig

Build with clang compiler

$ cmake -B build -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
$ cmake --build build -j
$ sudo cmake --install build
$ sudo ldconfig

License

The librem project is using the BSD license.

Contributing

Patches can sent via Github Pull-Requests

Modules

Audio Modules:

  name:     status:       description:

* aac       unstable      Advanced Audio Coding (AAC)
* au        testing       Base audio types
* aubuf     testing       Audio buffer
* auconv    unstable      Audio sample format conversion
* aufile    testing       Audio file reader/writer
* aumix     unstable      Audio mixer
* auresamp  unstable      Audio resampler
* autone    testing       Tone/DTMF generator
* dtmf      unstable      DTMF decoder
* g711      stable        G.711 audio codec




Video Modules:

  name:     status:       description:

* avc       unstable      Advanced Video Coding (AVC)
* h264      unstable      H.264 header parser
* vid       testing       Base video types
* vidconv   testing       Colorspace conversion and scaling
* vidmix    unstable      Video mixer




Generic modules:

* dsp       testing       DSP routines
* flv       unstable      Flash Video File Format
* fir       unstable      FIR (Finite Impulse Response) filter
* goertzel  unstable      Goertzel Algorithm

Specifications:

• ITU-T G.711 Appendix I and Appendix II

Supported platforms

Same as libre

Related projects

• libre
• retest
• baresip

References

https://github.com/baresip