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plugin: Fix scaled subtitles position on anamorph video

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GStreamer does not take pixel aspect ratio into account for overlay rectangles.
If we do so, we end up with subtitles that are displayed off-center.
Behave like any other GStreamer sink on this matter.
This commit is contained in:
Rafał Dzięgiel
2022-05-27 19:38:02 +02:00
parent 87b3fbc15a
commit 5289b2f0a4
3 changed files with 17 additions and 12 deletions
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6
lib/gst/plugin/gstclapperpaintable.c vendored
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@@ -59,7 +59,6 @@ gst_clapper_paintable_init (GstClapperPaintable *self)
self->par_n = DEFAULT_PAR_N;
self->par_d = DEFAULT_PAR_D;
self->pixel_aspect = ((gdouble) self->par_d / self->par_n);
g_mutex_init (&self->lock);
g_mutex_init (&self->importer_lock);
@@ -159,8 +158,6 @@ invalidate_paintable_size_internal (GstClapperPaintable *self)
display_ratio_num = self->display_ratio_num;
display_ratio_den = self->display_ratio_den;
self->pixel_aspect = ((gdouble) self->par_d / self->par_n);
GST_CLAPPER_PAINTABLE_UNLOCK (self);
if (video_height % display_ratio_den == 0) {
@@ -361,8 +358,7 @@ gst_clapper_paintable_snapshot_internal (GstClapperPaintable *self,
GST_CLAPPER_PAINTABLE_IMPORTER_LOCK (self);
if (self->importer) {
gst_clapper_importer_snapshot (self->importer, snapshot, width, height,
scale_x * self->pixel_aspect, scale_y);
gst_clapper_importer_snapshot (self->importer, snapshot, width, height);
} else {
GST_LOG_OBJECT (self, "No texture importer, drawing black");
gtk_snapshot_append_color (snapshot, &self->bg, &GRAPHENE_RECT_INIT (0, 0, width, height));