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Welcome to the Alsa plugins for the parameter-framework wiki!

Abstract

Audio HW codec vendors are using Alsa framework to write drivers for their sound card.

The Alsa framework allows them to expose:

• "Alsa mixer controls" to control the sound card parameters (Volumes, Switches, Processing, Interfaces...)
• "Alsa devices" the send/receive audio streams to/from a sound card

Alsa & TinyAlsa plugins have been developped to parameterize "Alsa mixer controls" and "Alsa devices" from the parameter-framework.

Plugins overview

Alsa plugin

The Alsa plugin is based on alsa-lib which is standard user space library for most of the linux distributions.

Library:

• libalsa-subsystem.so is used to handle alsa mixer controls and configure alsa devices through alsa-lib.

Tinyalsa plugin

The tinyalsa plugin is based on tinyalsa project which is used in Android's user space.

Library:

• libtinyalsa-subsystem.so is used to handle alsa mixer controls and configure alsa devices through libtinyalsa.

Compatibility Matrix

Check which plugin/core version couples are supported here

Tutorials

• Use Alsa & Tinyalsa plugins to parameterize HW-Codec