We need a database of pixel format properties to remove hardcoded magic
numbers. This commit creates a simple function to query the bytes per
pixel for common RGBA formats.
This should be promoted to or superseeded by a common spa namespaced
version.
This splots the format enumeration into a helper for dsp and raw pod
creation and a common function for the compute filters.
Counting formats with modifiers will be usefull to announce dsp and
raw formats from the same node.
No functional changes.
This commit should just shuffle code around with no functional changes.
The goal is to ease development of simple vulkan nodes by providing
generic helpers.
