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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 plugins

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

Libraries:

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

Tinyalsa plugins

Tinyalsa plugins are based on tinyalsa project which is used in Android's user space.

Libraries:

• libtinyamixer-subsystem.so is used to handle alsa mixer controls through tinyalsa.
• libtinyalsactl-subsystem.so is used to configure alsa devices through tinyalsa.

Tutorials

• Use Alsa & Tinyalsa plugins to parameterize HW-Codec