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glcontext: add a method to add a context to another share group

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Intended for use with wrapped contexts that are created shared with gst's
gl contexts in order to manage the internal sharegroup state correctly.

e.g. with caopengllayer (which is used in glimagesink and caopengllayersink
on OS X), we create a CGL context from the gst context and the sharing state
was not being correctly set on either GL context and gst_gl_context_is_shared()
was always returning FALSE.

With 11fb4fff80 only flushing with multiple
shared contexts, the required flush was not occuring causing screen
corruption or stuttering.

Note: this didn't affect GST_GL_API=opengl pipelines

https://bugzilla.gnome.org/show_bug.cgi?id=762620
This commit is contained in:
Matthew Waters 2016-02-26 08:34:11 +11:00
parent a50e4bcadf
commit abec124f69
3 changed files with 30 additions and 1 deletions
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1
gst-libs/gst/gl/cocoa/gstglcaopengllayer.m
View file

@ -126,6 +126,7 @@ _context_ready (gpointer data)
}
gst_gl_context_activate (self->draw_context, TRUE);
gst_gl_context_set_shared_with (self->draw_context, self->gst_gl_context);
if (!gst_gl_context_fill_info (self->draw_context, &error)) {
GST_ERROR ("failed to fill wrapped context information: %s", error->message);
return NULL;

29
gst-libs/gst/gl/gstglcontext.c
View file

@ -1617,11 +1617,38 @@ gboolean
gst_gl_context_is_shared (GstGLContext * context)
{
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
g_return_val_if_fail (context->priv->alive, FALSE);
if (GST_IS_GL_WRAPPED_CONTEXT (context))
g_return_val_if_fail (context->priv->active_thread, FALSE);
else
g_return_val_if_fail (context->priv->alive, FALSE);
return _context_share_group_is_shared (context->priv->sharegroup);
}
/**
* gst_gl_context_set_shared_with:
* @context: a wrapped #GstGLContext
* @share: another #GstGLContext
*
* Will internally set @context as shared with @share
*
* Since: 1.8
*/
void
gst_gl_context_set_shared_with (GstGLContext * context, GstGLContext * share)
{
g_return_if_fail (GST_IS_GL_CONTEXT (context));
g_return_if_fail (GST_IS_GL_CONTEXT (share));
g_return_if_fail (!gst_gl_context_is_shared (context));
/* XXX: may be a little too strict */
g_return_if_fail (GST_IS_GL_WRAPPED_CONTEXT (context));
if (context->priv->sharegroup)
_context_share_group_unref (context->priv->sharegroup);
context->priv->sharegroup =
_context_share_group_ref (share->priv->sharegroup);
}
static GstGLAPI
gst_gl_wrapped_context_get_gl_api (GstGLContext * context)
{

1
gst-libs/gst/gl/gstglcontext.h
View file

@ -149,6 +149,7 @@ guintptr gst_gl_context_get_current_gl_context (GstGLPlatform platform)
GstGLAPI gst_gl_context_get_current_gl_api (GstGLPlatform platform, guint *major, guint *minor);
gboolean gst_gl_context_is_shared (GstGLContext * context);
void gst_gl_context_set_shared_with (GstGLContext * context, GstGLContext * share);
gboolean gst_gl_context_fill_info (GstGLContext * context, GError ** error);