mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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612102fdbc
volatile is not sufficient to provide atomic guarantees and real atomics should be used instead. GCC 11 has started warning about using volatile with atomic operations. https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719 Discovered in https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/868 Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/911>
360 lines
13 KiB
C++
360 lines
13 KiB
C++
/*
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* GStreamer
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* Copyright (C) 2016 Freescale Semiconductor, Inc. All rights reserved.
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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 "gstqtglutility.h"
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#include <QtGui/QGuiApplication>
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#if GST_GL_HAVE_WINDOW_X11 && defined (HAVE_QT_X11)
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#include <QX11Info>
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#include <gst/gl/x11/gstgldisplay_x11.h>
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#include <QtPlatformHeaders/QGLXNativeContext>
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#endif
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#if GST_GL_HAVE_PLATFORM_EGL && (defined (HAVE_QT_WAYLAND) || defined (HAVE_QT_EGLFS) || defined (HAVE_QT_ANDROID))
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#include <gst/gl/egl/gstegl.h>
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#ifdef HAVE_QT_QPA_HEADER
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#include QT_QPA_HEADER
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#endif
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#include <QtPlatformHeaders/QEGLNativeContext>
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#include <gst/gl/egl/gstgldisplay_egl.h>
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#endif
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#if GST_GL_HAVE_WINDOW_WAYLAND && defined (HAVE_QT_WAYLAND)
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#include <gst/gl/wayland/gstgldisplay_wayland.h>
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#endif
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#if GST_GL_HAVE_WINDOW_VIV_FB
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#include <gst/gl/viv-fb/gstgldisplay_viv_fb.h>
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#endif
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#if GST_GL_HAVE_WINDOW_WIN32 && GST_GL_HAVE_PLATFORM_WGL && defined (HAVE_QT_WIN32)
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#include <windows.h>
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#include <QtPlatformHeaders/QWGLNativeContext>
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#endif
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#include <gst/gl/gstglfuncs.h>
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#define GST_CAT_DEFAULT qt_gl_utils_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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G_LOCK_DEFINE_STATIC (display_lock);
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static GWeakRef qt_display;
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GstGLDisplay *
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gst_qt_get_gl_display ()
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{
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GstGLDisplay *display = NULL;
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QGuiApplication *app = static_cast<QGuiApplication *> (QCoreApplication::instance ());
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static gsize _debug;
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g_assert (app != NULL);
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if (g_once_init_enter (&_debug)) {
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "qtglutility", 0,
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"Qt gl utility functions");
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g_once_init_leave (&_debug, 1);
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}
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G_LOCK (display_lock);
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/* XXX: this assumes that only one display will ever be created by Qt */
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display = static_cast<GstGLDisplay *>(g_weak_ref_get (&qt_display));
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if (display) {
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GST_INFO ("returning previously created display");
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G_UNLOCK (display_lock);
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return display;
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}
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GST_INFO ("QGuiApplication::instance()->platformName() %s", app->platformName().toUtf8().data());
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#if GST_GL_HAVE_WINDOW_X11 && defined (HAVE_QT_X11)
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if (QString::fromUtf8 ("xcb") == app->platformName())
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display = (GstGLDisplay *)
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gst_gl_display_x11_new_with_display (QX11Info::display ());
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#endif
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#if GST_GL_HAVE_WINDOW_WAYLAND && GST_GL_HAVE_PLATFORM_EGL && defined (HAVE_QT_WAYLAND)
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if (QString::fromUtf8 ("wayland") == app->platformName()
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|| QString::fromUtf8 ("wayland-egl") == app->platformName()){
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struct wl_display * wayland_display;
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QPlatformNativeInterface *native =
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QGuiApplication::platformNativeInterface();
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wayland_display = (struct wl_display *)
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native->nativeResourceForWindow("display", NULL);
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display = (GstGLDisplay *)
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gst_gl_display_wayland_new_with_display (wayland_display);
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}
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#endif
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#if GST_GL_HAVE_PLATFORM_EGL && GST_GL_HAVE_WINDOW_ANDROID
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if (QString::fromUtf8 ("android") == app->platformName()) {
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EGLDisplay egl_display = (EGLDisplay) gst_gl_display_egl_get_from_native (GST_GL_DISPLAY_TYPE_ANY, 0);
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display = (GstGLDisplay *) gst_gl_display_egl_new_with_egl_display (egl_display);
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}
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#elif GST_GL_HAVE_PLATFORM_EGL && defined (HAVE_QT_EGLFS)
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if (QString::fromUtf8("eglfs") == app->platformName()) {
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#if GST_GL_HAVE_WINDOW_VIV_FB
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/* FIXME: Could get the display directly from Qt like this
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QPlatformNativeInterface *native =
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QGuiApplication::platformNativeInterface();
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EGLDisplay egl_display = (EGLDisplay)
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native->nativeResourceForWindow("egldisplay", NULL);
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However we seem to have no way for getting the EGLNativeDisplayType, aka
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native_display, via public API. As such we have to assume that display 0
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is always used. Only way around that is parsing the index the same way as
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Qt does in QEGLDeviceIntegration::fbDeviceName(), so let's do that.
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*/
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const gchar *fb_dev;
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gint disp_idx = 0;
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fb_dev = g_getenv ("QT_QPA_EGLFS_FB");
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if (fb_dev) {
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if (sscanf (fb_dev, "/dev/fb%d", &disp_idx) != 1)
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disp_idx = 0;
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}
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display = (GstGLDisplay *) gst_gl_display_viv_fb_new (disp_idx);
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#elif defined(HAVE_QT_QPA_HEADER)
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QPlatformNativeInterface *native =
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QGuiApplication::platformNativeInterface();
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EGLDisplay egl_display = (EGLDisplay)
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native->nativeResourceForWindow("egldisplay", NULL);
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if (egl_display != EGL_NO_DISPLAY)
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display = (GstGLDisplay *) gst_gl_display_egl_new_with_egl_display (egl_display);
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#else
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EGLDisplay egl_display = (EGLDisplay) gst_gl_display_egl_get_from_native (GST_GL_DISPLAY_TYPE_ANY, 0);
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display = (GstGLDisplay *) gst_gl_display_egl_new_with_egl_display (egl_display);
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#endif
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}
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#endif
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#if GST_GL_HAVE_WINDOW_COCOA && GST_GL_HAVE_PLATFORM_CGL && defined (HAVE_QT_MAC)
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if (QString::fromUtf8 ("cocoa") == app->platformName())
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display = (GstGLDisplay *) gst_gl_display_new ();
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#endif
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#if GST_GL_HAVE_WINDOW_EAGL && GST_GL_HAVE_PLATFORM_EAGL && defined (HAVE_QT_IOS)
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if (QString::fromUtf8 ("ios") == app->platformName())
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display = gst_gl_display_new ();
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#endif
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#if GST_GL_HAVE_WINDOW_WIN32 && GST_GL_HAVE_PLATFORM_WGL && defined (HAVE_QT_WIN32)
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if (QString::fromUtf8 ("windows") == app->platformName())
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display = gst_gl_display_new ();
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#endif
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if (!display)
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display = gst_gl_display_new ();
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g_weak_ref_set (&qt_display, display);
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G_UNLOCK (display_lock);
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return display;
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}
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gboolean
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gst_qt_get_gl_wrapcontext (GstGLDisplay * display,
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GstGLContext **wrap_glcontext, GstGLContext **context)
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{
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GstGLPlatform platform = (GstGLPlatform) 0;
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GstGLAPI gl_api;
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guintptr gl_handle;
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GError *error = NULL;
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g_return_val_if_fail (display != NULL && wrap_glcontext != NULL, FALSE);
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/* see if we already have a current GL context in GStreamer for this thread */
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{
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GstGLContext *current = gst_gl_context_get_current ();
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if (current) {
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if (current->display == display) {
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*wrap_glcontext = static_cast<GstGLContext *> (gst_object_ref (current));
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return TRUE;
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}
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}
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}
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#if GST_GL_HAVE_WINDOW_X11 && defined (HAVE_QT_X11)
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if (GST_IS_GL_DISPLAY_X11 (display)) {
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#if GST_GL_HAVE_PLATFORM_GLX
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platform = GST_GL_PLATFORM_GLX;
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#elif GST_GL_HAVE_PLATFORM_EGL
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platform = GST_GL_PLATFORM_EGL;
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#endif
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}
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#endif
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#if GST_GL_HAVE_WINDOW_WAYLAND && defined (HAVE_QT_WAYLAND)
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if (GST_IS_GL_DISPLAY_WAYLAND (display)) {
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platform = GST_GL_PLATFORM_EGL;
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}
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#endif
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#if GST_GL_HAVE_PLATFORM_EGL && defined (HAVE_QT_EGLFS)
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#if GST_GL_HAVE_WINDOW_VIV_FB
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if (GST_IS_GL_DISPLAY_VIV_FB (display)) {
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#else
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if (GST_IS_GL_DISPLAY_EGL (display)) {
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#endif
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platform = GST_GL_PLATFORM_EGL;
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}
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#endif
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if (platform == 0) {
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#if GST_GL_HAVE_WINDOW_COCOA && GST_GL_HAVE_PLATFORM_CGL && defined (HAVE_QT_MAC)
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platform = GST_GL_PLATFORM_CGL;
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#elif GST_GL_HAVE_WINDOW_EAGL && GST_GL_HAVE_PLATFORM_EAGL && defined (HAVE_QT_IOS)
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platform = GST_GL_PLATFORM_EAGL;
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#elif GST_GL_HAVE_WINDOW_WIN32 && GST_GL_HAVE_PLATFORM_WGL && defined (HAVE_QT_WIN32)
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platform = GST_GL_PLATFORM_WGL;
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#elif GST_GL_HAVE_WINDOW_ANDROID && GST_GL_HAVE_PLATFORM_EGL && defined (HAVE_QT_ANDROID)
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platform = GST_GL_PLATFORM_EGL;
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#else
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GST_ERROR ("Unknown platform");
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return FALSE;
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#endif
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}
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gl_api = gst_gl_context_get_current_gl_api (platform, NULL, NULL);
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gl_handle = gst_gl_context_get_current_gl_context (platform);
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if (gl_handle)
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*wrap_glcontext =
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gst_gl_context_new_wrapped (display, gl_handle,
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platform, gl_api);
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if (!*wrap_glcontext) {
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GST_ERROR ("cannot wrap qt OpenGL context");
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return FALSE;
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}
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(void) platform;
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(void) gl_api;
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(void) gl_handle;
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gst_gl_context_activate(*wrap_glcontext, TRUE);
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if (!gst_gl_context_fill_info (*wrap_glcontext, &error)) {
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GST_ERROR ("failed to retrieve qt context info: %s", error->message);
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gst_object_unref (*wrap_glcontext);
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*wrap_glcontext = NULL;
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return FALSE;
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} else {
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gst_gl_display_filter_gl_api (display, gst_gl_context_get_gl_api (*wrap_glcontext));
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#if GST_GL_HAVE_WINDOW_WIN32 && GST_GL_HAVE_PLATFORM_WGL && defined (HAVE_QT_WIN32)
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g_return_val_if_fail (context != NULL, FALSE);
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G_STMT_START {
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GstGLWindow *window;
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HDC device;
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/* If there's no wglCreateContextAttribsARB() support, then we would fallback to
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* wglShareLists() which will fail with ERROR_BUSY (0xaa) if either of the GL
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* contexts are current in any other thread.
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*
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* The workaround here is to temporarily disable Qt's GL context while we
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* set up our own.
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*
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* Sometimes wglCreateContextAttribsARB()
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* exists, but isn't functional (some Intel drivers), so it's easiest to do this
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* unconditionally.
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*/
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*context = gst_gl_context_new (display);
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window = gst_gl_context_get_window (*context);
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device = (HDC) gst_gl_window_get_display (window);
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wglMakeCurrent (device, 0);
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gst_object_unref (window);
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if (!gst_gl_context_create (*context, *wrap_glcontext, &error)) {
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GST_ERROR ("failed to create shared GL context: %s", error->message);
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gst_object_unref (*context);
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*context = NULL;
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gst_object_unref (*wrap_glcontext);
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*wrap_glcontext = NULL;
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wglMakeCurrent (device, (HGLRC) gl_handle);
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return FALSE;
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}
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wglMakeCurrent (device, (HGLRC) gl_handle);
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} G_STMT_END;
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#endif
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gst_gl_context_activate (*wrap_glcontext, FALSE);
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}
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return TRUE;
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}
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QVariant
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qt_opengl_native_context_from_gst_gl_context (GstGLContext * context)
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{
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guintptr handle;
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GstGLPlatform platform;
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handle = gst_gl_context_get_gl_context (context);
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platform = gst_gl_context_get_gl_platform (context);
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#if GST_GL_HAVE_WINDOW_X11 && defined (HAVE_QT_X11)
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if (platform == GST_GL_PLATFORM_GLX) {
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GstGLDisplay *display = gst_gl_context_get_display (context);
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GstGLWindow *window = gst_gl_context_get_window (context);
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Display *xdisplay = (Display *) gst_gl_display_get_handle (display);
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Window win = gst_gl_window_get_window_handle (window);
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gst_object_unref (window);
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gst_object_unref (display);
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return QVariant::fromValue(QGLXNativeContext((GLXContext) handle, xdisplay, win));
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}
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#endif
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#if GST_GL_HAVE_PLATFORM_EGL && (defined (HAVE_QT_WAYLAND) || defined (HAVE_QT_EGLFS) || defined (HAVE_QT_ANDROID))
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if (platform == GST_GL_PLATFORM_EGL) {
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EGLDisplay egl_display = EGL_DEFAULT_DISPLAY;
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GstGLDisplay *display = gst_gl_context_get_display (context);
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GstGLDisplayEGL *display_egl = gst_gl_display_egl_from_gl_display (display);
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#if GST_GL_HAVE_WINDOW_WAYLAND && defined (HAVE_QT_WAYLAND)
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if (gst_gl_display_get_handle_type (display) == GST_GL_DISPLAY_TYPE_WAYLAND) {
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#if 1
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g_warning ("Qt does not support wrapping native OpenGL contexts "
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"on wayland. See https://bugreports.qt.io/browse/QTBUG-82528");
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gst_object_unref (display_egl);
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gst_object_unref (display);
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return QVariant::fromValue(nullptr);
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#else
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if (display_egl)
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egl_display = (EGLDisplay) gst_gl_display_get_handle ((GstGLDisplay *) display_egl);
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#endif
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}
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#endif
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gst_object_unref (display_egl);
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gst_object_unref (display);
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return QVariant::fromValue(QEGLNativeContext((EGLContext) handle, egl_display));
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}
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#endif
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#if GST_GL_HAVE_WINDOW_WIN32 && GST_GL_HAVE_PLATFORM_WGL && defined (HAVE_QT_WIN32)
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if (platform == GST_GL_PLATFORM_WGL) {
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GstGLWindow *window = gst_gl_context_get_window (context);
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guintptr hwnd = gst_gl_window_get_window_handle (window);
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gst_object_unref (window);
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return QVariant::fromValue(QWGLNativeContext((HGLRC) handle, (HWND) hwnd));
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}
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#endif
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{
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gchar *platform_s = gst_gl_platform_to_string (platform);
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g_warning ("Unimplemented configuration! This means either:\n"
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"1. The qmlgl plugin was built without support for your platform.\n"
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"2. The necessary code to convert from a GstGLContext to Qt's "
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"native context type for \'%s\' currently does not exist.",
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platform_s);
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g_free (platform_s);
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}
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return QVariant::fromValue(nullptr);
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}
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