Ichthyostega 0ae96294e8 XV-Display: start a research project to port the existing code (see #1403) ...

- initial assessment shows that the Design of the **Displayer** framework is adequate
 - for context: this code originates from the »Kino« video editor 20 years ago
 - notably the `XvDisplayer` contains almost no GTK(2)-code
 - so it seems feasible to attempt a port to GTK-3

This is a limited research project, and the setup shall be based mostly on existing code.
In the early stage of the Lumiera application, we did some architecture studies
regarding ongoing video generation and display, resulting in a `DemoVideoPlayer`.

This code was broken by the GTK-3 transition, but kept in-tree for later referral.
For this research project, we can mostly short-circuit all of the layer separation
and service communication stuff and build a minimal invocation directly hooked-up
behind the GUI widget. In preparation for such a setup, the existing
demo player code is partially forked by this changeset, pushing aside
the (defunct) !DummyPlayer pseudo-subsystem.

2025-05-02 23:19:55 +02:00

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