Commit graph

6 commits

Author SHA1 Message Date
Holger Kaelberer
76c0881549 video: overlay-composition: add support for global alpha multiplicator
https://bugzilla.gnome.org/show_bug.cgi?id=668483
2012-03-25 11:27:24 +01:00
Vincent Penquerc'h
5cf87eedc4 video: overlays may now have premultiplied alpha
https://bugzilla.gnome.org/show_bug.cgi?id=666177
2012-01-06 10:19:19 +00:00
Tim-Philipp Müller
91bbfbd819 video: make composition_blend() return a boolean
Not that anyone will ever check that, and it's not clear what
they're supposed to do if it fails, but at least it's there.
2011-12-07 18:45:28 +00:00
Tim-Philipp Müller
6757afc0bc docs: add new API to docs 2011-12-07 18:38:06 +00:00
Tim-Philipp Müller
5037b39883 video: add seqnum getters for overlay compositions and rectangles
API: gst_video_overlay_composition_get_seqnum()
API: gst_video_overlay_rectangle_get_seqnum()
2011-12-07 17:57:08 +00:00
Tim-Philipp Müller
6630236af4 video: add video overlay composition API for subtitles
Basic API to attach overlay rectangles to buffers,
or blend them directly onto raw video buffers.

To be used primarily for things like subtitles or
logo overlays, not meant to replace videomixer.

Allows us to associate subtitle overlays with
non-raw video surface buffers, so that subtitles
are not lost and can instead be rendered later
when those surfaces are displayed or converted,
whilst re-using all the existing overlay plugins
and not having to teach them about our special
video surfaces. Could also have been made part
of the surface buffer abstraction of course, but
a secondary goal was to consolidate the blending
code for raw video into libgstvideo, and this
kind of API allows us to do both in a way that's
minimally invasive to existing elements, and at
the same time is fairly intuitive.

More features and extensions like the ability to
pass the source data or text/markup directly will
be added later.

https://bugzilla.gnome.org/show_bug.cgi?id=665080

API: gst_video_buffer_get_overlay_composition()
API: gst_video_buffer_set_overlay_composition()

API: gst_video_overlay_composition_new()
API: gst_video_overlay_composition_add_rectangle()
API: gst_video_overlay_composition_n_rectangles()
API: gst_video_overlay_composition_get_rectangle()
API: gst_video_overlay_composition_make_writable()
API: gst_video_overlay_composition_copy()
API: gst_video_overlay_composition_ref()
API: gst_video_overlay_composition_unref()

API: gst_video_overlay_composition_blend()

API: gst_video_overlay_rectangle_new_argb()
API: gst_video_overlay_rectangle_get_pixels_argb()
API: gst_video_overlay_rectangle_get_pixels_unscaled_argb()
API: gst_video_overlay_rectangle_get_render_rectangle()
API: gst_video_overlay_rectangle_set_render_rectangle()
API: gst_video_overlay_rectangle_copy()
API: gst_video_overlay_rectangle_ref()
API: gst_video_overlay_rectangle_unref()
2011-12-05 15:37:02 +00:00