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gst.vaapi.app.Display context is made for applications that will provide the VA display and the native display to used by the pipeline, when are using vaapisink as overlay. There are no use case for encoders, decoders, neither for the postprocessor. In the case of the vaapisink, it shall query for gst.vaapi.Display upstream first, and then, if there is no reply, gst.vaapi.app.Display context will be posted in the bus for the application. If the application replies, a GstVaapiDisplay object is instantiated given the context info, otherwise a GstVaapiDisplay is created with the normal algorithm to guess the graphics platform. Either way, the instantiated GstVaapiDisplay is propagated among the pipeline and the have-message bus message. Also only vaapisink will process the gst.vaapi.app.Display, if and only if, it doesn't have a display already set. This is caused because if vaapisink is in a bin (playsink, for example) the need-context is posted twice, leading to an error state. https://bugzilla.gnome.org/show_bug.cgi?id=790999
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/*
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* gstvaapivideocontext.h - GStreamer/VA video context
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*
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* Copyright (C) 2010-2011 Splitted-Desktop Systems
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* Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
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* Copyright (C) 2011-2013 Intel Corporation
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* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
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* Copyright (C) 2013 Igalia
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* Author: Víctor Manuel Jáquez Leal <vjaquez@igalia.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 Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#ifndef GST_VAAPI_VIDEO_CONTEXT_H
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#define GST_VAAPI_VIDEO_CONTEXT_H
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#include <gst/vaapi/gstvaapidisplay.h>
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#define GST_VAAPI_DISPLAY_CONTEXT_TYPE_NAME "gst.vaapi.Display"
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#define GST_VAAPI_DISPLAY_APP_CONTEXT_TYPE_NAME "gst.vaapi.app.Display"
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G_GNUC_INTERNAL
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void
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gst_vaapi_video_context_set_display (GstContext * context,
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GstVaapiDisplay * display);
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G_GNUC_INTERNAL
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GstContext *
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gst_vaapi_video_context_new_with_display (GstVaapiDisplay * display,
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gboolean persistent);
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G_GNUC_INTERNAL
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gboolean
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gst_vaapi_video_context_get_display (GstContext * context, gboolean app_context,
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GstVaapiDisplay ** display_ptr);
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G_GNUC_INTERNAL
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gboolean
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gst_vaapi_video_context_prepare (GstElement * element,
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GstVaapiDisplay ** display_ptr);
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G_GNUC_INTERNAL
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void
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gst_vaapi_video_context_propagate (GstElement * element,
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GstVaapiDisplay * display);
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G_GNUC_INTERNAL
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gboolean
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gst_vaapi_find_gl_local_context (GstElement * element,
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GstObject ** gl_context_ptr, GstPadDirection * direction);
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#endif /* GST_VAAPI_VIDEO_CONTEXT_H */
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