Beyond Linux® From Scratch - Version 7.9

Chapter 46. Multimedia Libraries and Drivers

alsa-plugins-1.1.0

Introduction to ALSA Plugins

The ALSA Plugins package contains plugins for various audio libraries and sound servers.

This package is known to build using an LFS 7.9 platform but has not been tested.

Package Information

ALSA Plugins Dependencies

Required

alsa-lib-1.1.0

Optional

FFmpeg-2.8.6, libsamplerate-0.1.8, PulseAudio-8.0, Speex-1.2rc2, JACK, and maemo

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/alsa-plugins

Installation of ALSA Plugins

Install ALSA Plugins by running the following commands: 

sed -i "/speex_preprocess.h/i#include <stdint.h>" speex/pcm_speex.c &&
./configure &&
make

This package does not come with a test suite.

Now, as the root user: 

make install

Command Explanations

sed ... speex/pcm_speex.c: Fix a build problem when speex1.2rc2 is installed.

Contents

Installed Programs: None
Installed Libraries: Numerous libasound_module_<module>.so modules including ctl_oss, ctl_pulse, pcm_a52, pcm_jack, pcm_oss, pcm_pulse, pcm_upmix, pcm_usb_stream, pcm_vdownmix, rate_lavcrate*, rate_samplerate*, and rate_speexrate*
Installed Directories: None

Short Descriptions

libasound_module_pcm_oss.so

Allows native ALSA applications to run on OSS.

libasound_module_pcm_upmix.so

Allows upmixing sound to 4 or 6 channels.

libasound_module_pcm_vdownmix.so

Allows downmixing sound from 4-6 channels to 2 channel stereo output.

libasound_module_pcm_jack.so

Allows native ALSA applications to work with jackd.

libasound_module_pcm_pulse.so

Allows native ALSA applications to access a PulseAudio sound daemon.

libasound_module_pcm_a52.so

Converts S16 linear sound format to A52 compressed format and sends it to an SPDIF output.

libasound_module_rate_samplerate.so

Provides an external rate converter through libsamplerate.

Last updated on 2016-03-02 18:22:08 -0800