dany/clapper
1
0
Fork 0
mirror of https://github.com/Rafostar/clapper.git synced 2025-08-30 16:02:00 +02:00
Code Issues Packages Projects Releases Wiki Activity

plugin: Handle premultiplied alpha in RAW frames

Browse Source 
Add support for premultiplied alpha flag detection when creating GdkMemoryTextures.
Also check if overlays have premultiplied alpha and if they do set this flag for
their video info, so it will be detected when creating a GdkMemoryTexture out of them.

Fixes performance issues with karaoke subtitles, as now GTK does not have to perform
unnecessary multiplication.
This commit is contained in:
Rafał Dzięgiel
2022-05-12 17:55:38 +02:00
parent ae531db2b7
commit f351982067
3 changed files with 22 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
lib/gst/plugin/gstclapperimporter.c vendored
View File

@@ -248,6 +248,9 @@ gst_clapper_importer_prepare_overlays_locked (GstClapperImporter *self)
if ((v_meta = gst_buffer_get_video_meta (comp_buffer))) {
gst_video_info_set_format (&v_info, v_meta->format, v_meta->width, v_meta->height);
v_info.stride[0] = v_meta->stride[0];
if (alpha_flags & GST_VIDEO_OVERLAY_FORMAT_FLAG_PREMULTIPLIED_ALPHA)
v_info.flags |= GST_VIDEO_FLAG_PREMULTIPLIED_ALPHA;
}
if (G_UNLIKELY (!gst_video_frame_map (&comp_frame, &v_info, comp_buffer, GST_MAP_READ)))