mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-18 07:47:17 +00:00
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
|
/* GStreamer
|
||
|
|
* Copyright (C) 2022 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "gstwin32ipcutils.h"
|
||
|
|
#include <windows.h>
|
||
|
|
#include <string>
|
||
|
|
#include <mutex>
|
||
|
|
|
||
|
|
static ULONG global_index = 0;
|
||
|
|
|
||
|
|
static DWORD
|
||
|
|
gst_win32_ipc_get_pid (void)
|
||
|
|
{
|
||
|
|
static std::once_flag once_flag;
|
||
|
|
static DWORD pid = 0;
|
||
|
|
|
||
|
|
std::call_once (once_flag,[&]() {
|
||
|
|
pid = GetCurrentProcessId ();
|
||
|
|
});
|
||
|
|
|
||
|
|
return pid;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Create unique prefix for named shared memory */
|
||
|
|
gchar *
|
||
|
|
gst_win32_ipc_get_mmf_prefix (void)
|
||
|
|
{
|
||
|
|
std::string prefix = "Local\\gst.win32.ipc." +
|
||
|
|
std::to_string (gst_win32_ipc_get_pid ()) + std::string (".") +
|
||
|
|
std::to_string (InterlockedIncrement (&global_index)) + std::string (".");
|
||
|
|
|
||
|
|
return g_strdup (prefix.c_str ());
|
||
|
|
}
|
||
|
|
|
||
|
|
gboolean
|
||
|
|
gst_win32_ipc_clock_is_qpc (GstClock * clock)
|
||
|
|
{
|
||
|
|
GstClockType clock_type = GST_CLOCK_TYPE_MONOTONIC;
|
||
|
|
GstClock *mclock;
|
||
|
|
|
||
|
|
if (G_OBJECT_TYPE (clock) != GST_TYPE_SYSTEM_CLOCK)
|
||
|
|
return FALSE;
|
||
|
|
|
||
|
|
g_object_get (clock, "clock-type", &clock_type, nullptr);
|
||
|
|
if (clock_type != GST_CLOCK_TYPE_MONOTONIC)
|
||
|
|
return FALSE;
|
||
|
|
|
||
|
|
mclock = gst_clock_get_master (clock);
|
||
|
|
if (!mclock)
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
gst_object_unref (mclock);
|
||
|
|
|
||
|
|
return FALSE;
|
||
|
|
}
|