1712813 - AVIF OperatingPointSelectorProperty (a1op) and AV1LayeredImageIndexingProperty (a1lx) for progressive decoding

Status: NEW

(Core :: Graphics: ImageLib, task, P3)

Description

[Jon Bauman [:jbauman:]]

These are new properties related to the use of layered images for progressive decoding of AVIF.

See § 2.3.2. Properties of the AVIF spec

Comment 1

[Jake Archibald [:jakea]]

Attachment: Image of a fox with two progressive layers

Here's a sample image with two layers. In case it's useful, here's a 'viewer' for partial decodes https://random-stuff.jakearchibald.com/apps/partial-img-decode/

Comment 2

[Jake Archibald [:jakea]]

Attachment: Cat picture with three layers

Here's a demo that has three progressive passes, in case that's useful.