RDK-C : Audio playback with Pipewire utility

Introduction

Pipewire is a server and user space API to deal with multimedia pipelines.Most audio applications can use either ALSA, JACK or PulseAudio as a backend. PipeWire provides support for all 3 backends.The RDK camera software runs on RPI 3B+ device. This page dedicated to bringing up and validation of Audio playback with pipewire utility in RPI 3B+. 

Build and Flash Procedure

Refer below link to build camera image

RDK-C rdk-next Yocto 3.1 dunfell build for Raspberrypi

Validation Procedure of Video Playback

STEP 1:

Run the pipewire binary with below command

pipewire &

root@raspberrypi3-rdk-camera:~# pipewire & 

STEP 2:

Run the pipewire media session binary with below command

pipewire-media-session &

root@raspberrypi3-rdk-camera:~# pipewire-media-session &

STEP 3:

Place the "wav" format of audio file in RPI home root directory

For your reference please download and place this wav format of audio in you RPI target

Audio.wav

STEP 4:

Insert Headset jack or speaker aux port in RPI 3B+ target to receive audio.

Refer the below Environment setup

STEP 5:

Play "wav" format of audio with pipewire utility of "pw-play"

pw-play Audio.wav

root@raspberrypi3-rdk-camera:~# pw-play Audio.wav

Able to receive audio from Headset /  Speaker