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ba6800ce23
Adding DirectWrite text rendering elements * dwriteclockoverlay: Equivalent to clockoverlay * dwritetimeoverlay: Equivalent to timeoverlay * dwritetextoverlay: Similar to textoverlay but subtitle is not supported Newly added elements support system memory and d3d11 memory Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4826>
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
/* GStreamer
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* Copyright (C) 2023 Seungha Yang <seungha@centricular.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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstdwritetextoverlay.h"
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GST_DEBUG_CATEGORY_STATIC (dwrite_text_overlay_debug);
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#define GST_CAT_DEFAULT dwrite_text_overlay_debug
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struct _GstDWriteTextOverlay
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{
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GstDWriteBaseOverlay parent;
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};
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static WString gst_dwrite_text_overlay_get_text (GstDWriteBaseOverlay * overlay,
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const WString & default_text, GstBuffer * buffer);
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#define gst_dwrite_text_overlay_parent_class parent_class
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G_DEFINE_TYPE (GstDWriteTextOverlay, gst_dwrite_text_overlay,
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GST_TYPE_DWRITE_BASE_OVERLAY);
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static void
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gst_dwrite_text_overlay_class_init (GstDWriteTextOverlayClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstDWriteBaseOverlayClass *overlay_class =
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GST_DWRITE_BASE_OVERLAY_CLASS (klass);
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gst_element_class_set_static_metadata (element_class,
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"DirectWrite Text Overlay", "Filter/Editor/Video",
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"Adds text strings on top of a video buffer",
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"Seungha Yang <seungha@centricular.com>");
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overlay_class->get_text =
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GST_DEBUG_FUNCPTR (gst_dwrite_text_overlay_get_text);
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GST_DEBUG_CATEGORY_INIT (dwrite_text_overlay_debug,
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"dwritetextoverlay", 0, "dwritetextoverlay");
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}
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static void
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gst_dwrite_text_overlay_init (GstDWriteTextOverlay * self)
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{
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g_object_set (self, "text-alignment", DWRITE_TEXT_ALIGNMENT_CENTER,
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"paragraph-alignment", DWRITE_PARAGRAPH_ALIGNMENT_FAR, nullptr);
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}
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static WString
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gst_dwrite_text_overlay_get_text (GstDWriteBaseOverlay * overlay,
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const WString & default_text, GstBuffer * buffer)
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{
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return default_text;
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}
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