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/* GStreamer
* Copyright (C) 2016 Alessandro Decina <alessandro.d@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "glcontexthelper.h"
static GstGLContext *
_find_local_gl_context (GstGLContextHelper * ctxh)
{
GstGLContext *gl_context = NULL;
gst_gl_query_local_gl_context (GST_ELEMENT (ctxh->element), GST_PAD_SRC,
&gl_context);
return gl_context;
}
GstGLContextHelper *
gst_gl_context_helper_new (GstElement * element)
{
GstGLContextHelper *ctxh = g_new0 (GstGLContextHelper, 1);
ctxh->element = gst_object_ref (element);
return ctxh;
}
void
gst_gl_context_helper_free (GstGLContextHelper * ctxh)
{
g_return_if_fail (ctxh != NULL);
gst_object_unref (ctxh->element);
if (ctxh->display)
gst_object_unref (ctxh->display);
if (ctxh->context)
gst_object_unref (ctxh->context);
if (ctxh->other_context)
gst_object_unref (ctxh->other_context);
g_free (ctxh);
}
void
gst_gl_context_helper_ensure_context (GstGLContextHelper * ctxh)
{
GError *error = NULL;
GstGLContext *context;
g_return_if_fail (ctxh != NULL);
if (!ctxh->display)
gst_gl_ensure_element_data (ctxh->element, &ctxh->display,
&ctxh->other_context);
if (!ctxh->display)
goto display_error;
context = _find_local_gl_context (ctxh);
if (context) {
GST_INFO_OBJECT (ctxh->element, "found local context %p, old context %p",
context, ctxh->context);
if (ctxh->context)
gst_object_unref (ctxh->context);
ctxh->context = context;
}
if (!ctxh->context) {
GST_OBJECT_LOCK (ctxh->display);
do {
if (ctxh->context)
gst_object_unref (ctxh->context);
ctxh->context =
gst_gl_display_get_gl_context_for_thread (ctxh->display, NULL);
if (!ctxh->context) {
if (!gst_gl_display_create_context (ctxh->display,
ctxh->other_context, &ctxh->context, &error)) {
GST_OBJECT_UNLOCK (ctxh->display);
goto context_error;
}
}
} while (!gst_gl_display_add_context (ctxh->display, ctxh->context));
GST_OBJECT_UNLOCK (ctxh->display);
}
return;
context_error:
{
GST_ELEMENT_ERROR (ctxh->element, RESOURCE, NOT_FOUND, ("%s",
error->message), (NULL));
g_clear_error (&error);
return;
}
display_error:
{
GST_ELEMENT_ERROR (ctxh->element, RESOURCE, NOT_FOUND,
("Failed to obtain display"), (NULL));
return;
}
}
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