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# Overview of plugins shipped with AFB-Daemon
Version: 1
Date: 30 May 2016
Author: Manuel Bachmann
## List of plugins
Here are the plugins shipped in the source tree:
* Audio _(2 backends: ALSA/PulseAudio)_
* Radio _(1 backend: RTLSDR RTL2832U)_
* Media _(1 backend: Rygel UPnP)_
All plugins may not be built, depending on the development libraries present on the system at build time.
## Detail of plugins
### Audio
A sample Audio plugin with 2 backends:
* ALSA (mandatory)
* PulseAudio (optional)
_(if PulseAudio development libraries are not found at build time, only ALSA will be available)_
_(if a PulseAudio server is not found at runtime, the plugin will dynamically fall back to ALSA)_
_(a specifc backend can be forced by using this syntax before running afb-daemon : **$ export AFB_AUDIO_OUTPUT=Alsa**)_
This plugin is able to initialize a specific soundcard, define volume levels, channels (mono/stereo...), mute sound, and play a 22,050 Hz PCM stream.
Sample applications: **[afb-radio](https://github.com/iotbzh/afb-radio)**
### Radio
A sample AM/FM Radio plugin with 1 backend:
* RTLSDR - Realtek RTL2832U dongles (mandatory)
_(if rtlsdr development libraries are not found at build time, this plugin will not be built)_
This plugin is able to initialize specific RTL2832U dongles, switch between AM/FM modes, define frequency, mute sound, and play sound (by using the **audio** plugin).
Sample applications: **[afb-radio](https://github.com/iotbzh/afb-radio)**
### Media
A sample Media Server plugin with 1 backend:
* Rygel
_(if GUPnP/GSSDP development libraries are not fund at build time, this plugin will not be built)_
This plugin is able to detect a local Rygel UPnP media server, list audio files, select an audio file for playback, play/pause/seek in this file, upload an audio file to the server.
Sample applications: **[afb-radio](https://github.com/iotbzh/afb-radio)**
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