tree b9483a339f8b15e20223d49ba81c82d15ce2b758
parent 5d20e71220096e281a75536bcd0e754f434110c9
author Jonas Larsson <ljonas@google.com> 1569625703 -0700
committer Jonas Larsson <ljonas@google.com> 1570059998 -0700

Add and use custom plugin glsvgoverlaysink

This sink is purposedly written for the use cases at hand;
rendering SVG data on top of an OpenGL texture. It has multiple
benefits over off the shelf solutions:

* Draws SVG data with cairo straght into dmabuf backed textures
 without the need to re-upload every frame.
* Draws overlay on top of frame at the end of the pipeline instead
  of as a separate step upstream. This saves one full screen draw
  with blending.
* Is re-usable by any application using GStreamer (incl. gst-launch).

This sink together with optimizations on the GStreamer level runs
all existing 1080p demos at 30 fps without dropping a frame,
including rendering the overlays at 30 fps (up from ~12).

Change-Id: I62b3f7bf9fa838491be6ad1d891adb2075c00766