gstreamer/subprojects/gst-plugins-bad/sys/dwrite/gstdwrite-utils.cpp
Seungha Yang fce6edd0f1 dwrite: Add GstDWriteSubtitleMeta
dwrite plugin internal use and will be removed once it's added to -base

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4934>
2023-06-28 20:15:30 +00:00

158 lines
4 KiB
C++

/* GStreamer
* Copyright (C) 2023 Seungha Yang <seungha@centricular.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/d3d11/gstd3d11.h>
#include "gstdwrite-utils.h"
GType
gst_dwrite_subtitle_meta_api_get_type (void)
{
static GType type = 0;
static const gchar *tags[] = { NULL, };
GST_DWRITE_CALL_ONCE_BEGIN {
type = gst_meta_api_type_register ("GstDWriteSubtitleMetaAPI", tags);
} GST_DWRITE_CALL_ONCE_END;
return type;
}
static gboolean
gst_dwrite_subtitle_meta_init (GstMeta * meta, gpointer params,
GstBuffer * buffer)
{
GstDWriteSubtitleMeta *m = (GstDWriteSubtitleMeta *) meta;
m->stream = NULL;
m->subtitle = NULL;
return TRUE;
}
static void
gst_dwrite_subtitle_meta_free (GstMeta * meta, GstBuffer * buffer)
{
GstDWriteSubtitleMeta *m = (GstDWriteSubtitleMeta *) meta;
if (m->stream)
gst_object_unref (m->stream);
if (m->subtitle)
gst_buffer_unref (m->subtitle);
}
static gboolean
gst_dwrite_subtitle_meta_transform (GstBuffer * dest, GstMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
{
GstDWriteSubtitleMeta *dmeta, *smeta;
if (GST_META_TRANSFORM_IS_COPY (type)) {
smeta = (GstDWriteSubtitleMeta *) meta;
dmeta = gst_buffer_add_dwrite_subtitle_meta (dest,
smeta->stream, smeta->subtitle);
if (!dmeta)
return FALSE;
} else {
return FALSE;
}
return TRUE;
}
const GstMetaInfo *
gst_dwrite_subtitle_meta_get_info (void)
{
static const GstMetaInfo *info = NULL;
GST_DWRITE_CALL_ONCE_BEGIN {
info = gst_meta_register (GST_DWRITE_SUBTITLE_META_API_TYPE,
"GstDWriteSubtitleMeta",
sizeof (GstDWriteSubtitleMeta),
gst_dwrite_subtitle_meta_init,
gst_dwrite_subtitle_meta_free, gst_dwrite_subtitle_meta_transform);
}
GST_DWRITE_CALL_ONCE_END;
return info;
}
GstDWriteSubtitleMeta *
gst_buffer_add_dwrite_subtitle_meta (GstBuffer * buffer, GstStream * stream,
GstBuffer * subtitle)
{
GstDWriteSubtitleMeta *meta;
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
g_return_val_if_fail (GST_IS_STREAM (stream), NULL);
g_return_val_if_fail (GST_IS_BUFFER (subtitle), NULL);
meta = (GstDWriteSubtitleMeta *) gst_buffer_add_meta (buffer,
GST_DWRITE_SUBTITLE_META_INFO, NULL);
if (!meta)
return NULL;
meta->stream = (GstStream *) gst_object_ref (stream);
meta->subtitle = gst_buffer_ref (subtitle);
return meta;
}
gboolean
gst_dwrite_is_windows_10_or_greater (void)
{
static gboolean ret = FALSE;
GST_DWRITE_CALL_ONCE_BEGIN {
#if (!GST_D3D11_WINAPI_ONLY_APP)
OSVERSIONINFOEXW osverinfo;
typedef NTSTATUS (WINAPI fRtlGetVersion) (PRTL_OSVERSIONINFOEXW);
fRtlGetVersion *RtlGetVersion = NULL;
HMODULE hmodule = NULL;
memset (&osverinfo, 0, sizeof (OSVERSIONINFOEXW));
osverinfo.dwOSVersionInfoSize = sizeof (OSVERSIONINFOEXW);
hmodule = LoadLibraryW (L"ntdll.dll");
if (!hmodule)
return;
RtlGetVersion =
(fRtlGetVersion *) GetProcAddress (hmodule, "RtlGetVersion");
if (RtlGetVersion) {
RtlGetVersion (&osverinfo);
if (osverinfo.dwMajorVersion > 10 || osverinfo.dwMajorVersion == 10)
ret = TRUE;
}
if (hmodule)
FreeLibrary (hmodule);
#else
ret = TRUE;
#endif
} GST_DWRITE_CALL_ONCE_END;
return ret;
}