--- /dev/null
+/*
+ * gstvaapivideocontext.c - GStreamer/VA video context
+ *
+ * Copyright (C) 2010-2011 Splitted-Desktop Systems
+ * Copyright (C) 2011-2013 Intel Corporation
+ * Copyright (C) 2013 Igalia
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ */
+
+#include "gst/vaapi/sysdeps.h"
+#include "gstvaapivideocontext.h"
+
+#if GST_CHECK_VERSION(1,1,0)
+
+GST_DEBUG_CATEGORY_STATIC(GST_CAT_CONTEXT);
+
+#define GST_VAAPI_TYPE_DISPLAY \
+ gst_vaapi_display_get_type()
+
+GType
+gst_vaapi_display_get_type(void) G_GNUC_CONST;
+
+G_DEFINE_BOXED_TYPE(GstVaapiDisplay, gst_vaapi_display,
+ (GBoxedCopyFunc)gst_vaapi_display_ref,
+ (GBoxedFreeFunc)gst_vaapi_display_unref)
+
+GstContext *
+gst_vaapi_video_context_new_with_display(GstVaapiDisplay *display,
+ gboolean persistent)
+{
+ GstContext *context;
+ GstStructure *structure;
+
+ context = gst_context_new(GST_VAAPI_DISPLAY_CONTEXT_TYPE_NAME, persistent);
+ structure = gst_context_writable_structure(context);
+ gst_structure_set(structure, "display", GST_VAAPI_TYPE_DISPLAY,
+ display, NULL);
+ return context;
+}
+
+gboolean
+gst_vaapi_video_context_get_display(GstContext *context,
+ GstVaapiDisplay **display_ptr)
+{
+ const GstStructure *structure;
+
+ g_return_val_if_fail(GST_IS_CONTEXT(context), FALSE);
+ g_return_val_if_fail(g_strcmp0(gst_context_get_context_type(context),
+ GST_VAAPI_DISPLAY_CONTEXT_TYPE_NAME) == 0, FALSE);
+
+ structure = gst_context_get_structure(context);
+ return gst_structure_get(structure, "display", GST_VAAPI_TYPE_DISPLAY,
+ display_ptr, NULL);
+}
+
+static gboolean
+context_pad_query(const GValue *item, GValue *value, gpointer user_data)
+{
+ GstPad * const pad = g_value_get_object(item);
+ GstQuery * const query = user_data;
+
+ if (gst_pad_peer_query(pad, query)) {
+ g_value_set_boolean(value, TRUE);
+ return FALSE;
+ }
+
+ GST_CAT_INFO_OBJECT(GST_CAT_CONTEXT, pad, "context pad peer query failed");
+ return TRUE;
+}
+
+static gboolean
+run_context_query(GstElement *element, GstQuery *query)
+{
+ GstIteratorFoldFunction const func = context_pad_query;
+ GstIterator *it;
+ GValue res = { 0 };
+
+ g_value_init(&res, G_TYPE_BOOLEAN);
+ g_value_set_boolean(&res, FALSE);
+
+ /* Ask downstream neighbour */
+ it = gst_element_iterate_src_pads(element);
+ while (gst_iterator_fold(it, func, &res, query) == GST_ITERATOR_RESYNC)
+ gst_iterator_resync(it);
+ gst_iterator_free(it);
+
+ /* Ignore upstream neighbours */
+ return g_value_get_boolean(&res);
+}
+
+void
+gst_vaapi_video_context_prepare(GstElement *element, const gchar **types)
+{
+ GstContext *context;
+ GstQuery *query;
+
+ if (!GST_CAT_CONTEXT)
+ GST_DEBUG_CATEGORY_GET(GST_CAT_CONTEXT, "GST_CONTEXT");
+
+ /* (2) Query downstream with GST_QUERY_CONTEXT for the context and
+ check if downstream already has a context of the specified type */
+ context = NULL;
+ query = gst_query_new_context(GST_VAAPI_DISPLAY_CONTEXT_TYPE_NAME);
+ if (run_context_query(element, query)) {
+ gst_query_parse_context(query, &context);
+ GST_CAT_INFO_OBJECT(GST_CAT_CONTEXT, element,
+ "found context (%p) in query", context);
+ gst_element_set_context(element, context);
+ }
+ else {
+ /* (3) Post a GST_MESSAGE_NEED_CONTEXT message on the bus with
+ the required context types and afterwards check if a usable
+ context was set now as in (1). The message could be handled
+ by the parent bins of the element and the application */
+ GstMessage *msg;
+
+ GST_CAT_INFO_OBJECT(GST_CAT_CONTEXT, element,
+ "posting `need-context' message");
+ msg = gst_message_new_need_context(GST_OBJECT_CAST(element),
+ GST_VAAPI_DISPLAY_CONTEXT_TYPE_NAME);
+ gst_element_post_message(element, msg);
+ }
+ gst_query_unref(query);
+}
+
+/* (4) Create context by itself and post a GST_MESSAGE_HAVE_CONTEXT
+ message and send a GST_EVENT_CONTEXT event downstream, thus
+ containing the complete context information at this time */
+void
+gst_vaapi_video_context_propagate(GstElement *element, GstVaapiDisplay *display)
+{
+ GstContext *context;
+ GstMessage *msg;
+
+ if (!display) {
+ GST_ERROR_OBJECT(element, "failed to get VA-API display connection");
+ return;
+ }
+
+ context = gst_vaapi_video_context_new_with_display(display, FALSE);
+
+ GST_CAT_INFO_OBJECT(GST_CAT_CONTEXT, element,
+ "posting `have-context' (%p) message with display (%p)",
+ context, display);
+ msg = gst_message_new_have_context(GST_OBJECT_CAST(element), context);
+ gst_element_post_message(GST_ELEMENT_CAST(element), msg);
+}
+
+#endif
--- /dev/null
+/*
+ * gstvaapivideocontext.h - GStreamer/VA video context
+ *
+ * Copyright (C) 2010-2011 Splitted-Desktop Systems
+ * Copyright (C) 2011-2013 Intel Corporation
+ * Copyright (C) 2013 Igalia
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ */
+
+#ifndef GST_VAAPI_VIDEO_CONTEXT_H
+#define GST_VAAPI_VIDEO_CONTEXT_H
+
+#include <gst/vaapi/gstvaapidisplay.h>
+
+#if GST_CHECK_VERSION(1,1,0)
+
+#define GST_VAAPI_DISPLAY_CONTEXT_TYPE_NAME "gst.vaapi.Display"
+
+/* Fake GstVideoContext symbols */
+#define GST_VIDEO_CONTEXT(obj) (GST_ELEMENT(obj))
+#define GST_IS_VIDEO_CONTEXT(obj) (GST_IS_ELEMENT(obj))
+#define GstVideoContext GstElement
+#define gst_video_context_prepare gst_vaapi_video_context_prepare
+
+G_GNUC_INTERNAL
+GstContext *
+gst_vaapi_video_context_new_with_display(GstVaapiDisplay *display,
+ gboolean persistent);
+
+G_GNUC_INTERNAL
+gboolean
+gst_vaapi_video_context_get_display(GstContext *context,
+ GstVaapiDisplay **display_ptr);
+
+G_GNUC_INTERNAL
+void
+gst_vaapi_video_context_prepare(GstElement *element, const gchar **types);
+
+G_GNUC_INTERNAL
+void
+gst_vaapi_video_context_propagate(GstElement *element,
+ GstVaapiDisplay *display);
+
+#else
+#include <gst/video/videocontext.h>
+
+static inline void
+gst_vaapi_video_context_prepare(GstVideoContext *context, const gchar **types)
+{
+ gst_video_context_prepare(context, types);
+}
+
+static inline void
+gst_vaapi_video_context_propagate(GstVideoContext *context,
+ GstVaapiDisplay *display)
+{
+}
+
+#endif
+
+#endif /* GST_VAAPI_VIDEO_CONTEXT_H */
projects / platform / upstream / gstreamer.git / commitdiff