gstblurhashsrc: BlurHash GStreamer decoder

GStreamer plugin allowing the decoding of BlurHash (https://blurha.sh/) encoded hash values

It decodes an hash value into a 32-bit RGBA raw image

Uses decoder code from: https://github.com/woltapp/blurhash/tree/master/C

Build from source

Dependencies

• gstreamer-1.0 (dev)
• gstreamer-base-1.0 (dev)
• gstreamer-video-1.0 (dev)

Building

mkdir build
cd build
cmake ..
make

Usage

Plugin parameters:

• hash: hash value to be decoded (default value is: "LaJHjmVu8_po#smR+axaoLWCRj")

Plugin default values:

• hash: "LaJHjmVu8_po#smR+axaoLWCRj"
• width: 128
• height: 128

Sample usage pipelines:

$ gst-launch-1.0 blurhashsrc ! imagefreeze ! fakesink

$ gst-launch-1.0 blurhashsrc ! imagefreeze ! videoconvert ! ximagesink

$ gst-launch-1.0 blurhashsrc hash="L34x;VRlagRlRSowWDRl4aodowod" ! imagefreeze ! videoconvert ! ximagesink

$ gst-launch-1.0 blurhashsrc hash="L34x;VRlagRlRSowWDRl4aodowod" ! video/x-raw, width=256, height=256 ! imagefreeze ! videoconvert ! ximagesink

TODO:

• Add support for 24-bit RGB format.