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