mirror of
https://github.com/Rafostar/clapper.git
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plugin: Add "clapperglimport" element
A Clapper import element that imports GStreamer `GLMemory` into `GdkTexture` for improved performance where OpenGL is available
This commit is contained in:
Rafał Dzięgiel
414
lib/gst/plugin/gstclapperglbaseimport.c
vendored
Normal file
414
lib/gst/plugin/gstclapperglbaseimport.c
vendored
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@@ -0,0 +1,414 @@
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/*
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* Copyright (C) 2022 Rafał Dzięgiel <rafostar.github@gmail.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 <gtk/gtk.h>
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#include <gst/gl/gstglfuncs.h>
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#include "gstclapperglbaseimport.h"
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#include "gstgtkutils.h"
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#if GST_CLAPPER_GL_HAVE_WAYLAND
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#include <gdk/wayland/gdkwayland.h>
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#include <gst/gl/wayland/gstgldisplay_wayland.h>
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#endif
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#if GST_CLAPPER_GL_HAVE_X11
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#include <gdk/x11/gdkx.h>
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#endif
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#if GST_CLAPPER_GL_HAVE_X11_GLX
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#include <gst/gl/x11/gstgldisplay_x11.h>
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#endif
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#if GST_CLAPPER_GL_HAVE_X11_EGL
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#include <gst/gl/egl/gstgldisplay_egl.h>
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#endif
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#define GST_CAT_DEFAULT gst_clapper_gl_base_import_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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#define parent_class gst_clapper_gl_base_import_parent_class
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G_DEFINE_TYPE (GstClapperGLBaseImport, gst_clapper_gl_base_import, GST_TYPE_CLAPPER_BASE_IMPORT);
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static void
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gst_clapper_gl_base_import_init (GstClapperGLBaseImport *self)
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{
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g_mutex_init (&self->lock);
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}
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static void
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gst_clapper_gl_base_import_finalize (GObject *object)
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{
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GstClapperGLBaseImport *self = GST_CLAPPER_GL_BASE_IMPORT_CAST (object);
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g_clear_object (&self->gdk_context);
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gst_clear_object (&self->gst_context);
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gst_clear_object (&self->wrapped_context);
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gst_clear_object (&self->gst_display);
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g_mutex_clear (&self->lock);
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GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
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}
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static GstGLContext *
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wrap_current_gl (GstGLDisplay *display, GdkGLAPI gdk_gl_api, GstGLPlatform platform)
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{
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GstGLAPI gst_gl_api = GST_GL_API_NONE;
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switch (gdk_gl_api) {
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case GDK_GL_API_GL:
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gst_gl_api = GST_GL_API_OPENGL | GST_GL_API_OPENGL3;
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break;
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case GDK_GL_API_GLES:
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gst_gl_api = GST_GL_API_GLES2;
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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if (gst_gl_api != GST_GL_API_NONE) {
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guintptr gl_handle;
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gst_gl_display_filter_gl_api (display, gst_gl_api);
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if ((gl_handle = gst_gl_context_get_current_gl_context (platform)))
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return gst_gl_context_new_wrapped (display, gl_handle, platform, gst_gl_api);
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}
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return NULL;
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}
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static gboolean
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retrieve_gl_context_on_main (GstClapperGLBaseImport *self)
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{
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GstClapperGLBaseImportClass *gl_bi_class = GST_CLAPPER_GL_BASE_IMPORT_GET_CLASS (self);
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GdkDisplay *gdk_display;
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GdkGLContext *gdk_context;
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GError *error = NULL;
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GdkGLAPI gdk_gl_api;
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GstGLPlatform platform = GST_GL_PLATFORM_NONE;
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gint gl_major = 0, gl_minor = 0;
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if (!gtk_init_check ()) {
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GST_ERROR_OBJECT (self, "Could not ensure GTK initialization");
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return FALSE;
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}
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gdk_display = gdk_display_get_default ();
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if (!(gdk_context = gdk_display_create_gl_context (gdk_display, &error))) {
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GST_ERROR_OBJECT (self, "Error creating Gdk GL context: %s",
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error ? error->message : "No error set by Gdk");
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g_clear_error (&error);
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return FALSE;
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}
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if (!gl_bi_class->gdk_context_realize (self, gdk_context)) {
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GST_ERROR_OBJECT (self, "Could not realize Gdk context: %" GST_PTR_FORMAT,
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gdk_context);
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g_object_unref (gdk_context);
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return FALSE;
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}
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gdk_gl_api = gdk_gl_context_get_api (gdk_context);
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GST_CLAPPER_GL_BASE_IMPORT_LOCK (self);
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self->gdk_context = gdk_context;
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#if GST_CLAPPER_GL_HAVE_WAYLAND
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if (GDK_IS_WAYLAND_DISPLAY (gdk_display)) {
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struct wl_display *wayland_display =
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gdk_wayland_display_get_wl_display (gdk_display);
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self->gst_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_CLAPPER_GL_HAVE_X11
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if (GDK_IS_X11_DISPLAY (gdk_display)) {
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gpointer display_ptr;
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#if GST_CLAPPER_GL_HAVE_X11_EGL
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display_ptr = gdk_x11_display_get_egl_display (gdk_display);
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if (display_ptr) {
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self->gst_display = (GstGLDisplay *)
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gst_gl_display_egl_new_with_egl_display (display_ptr);
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}
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#endif
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#if GST_CLAPPER_GL_HAVE_X11_GLX
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if (!self->gst_display) {
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display_ptr = gdk_x11_display_get_xdisplay (gdk_display);
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self->gst_display = (GstGLDisplay *)
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gst_gl_display_x11_new_with_display (display_ptr);
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}
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}
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#endif
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#endif
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/* Fallback to generic display */
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if (G_UNLIKELY (!self->gst_display)) {
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GST_WARNING_OBJECT (self, "Unknown Gdk display!");
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self->gst_display = gst_gl_display_new ();
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}
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#if GST_CLAPPER_GL_HAVE_WAYLAND
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if (GST_IS_GL_DISPLAY_WAYLAND (self->gst_display)) {
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platform = GST_GL_PLATFORM_EGL;
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GST_INFO_OBJECT (self, "Using EGL on Wayland");
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goto have_display;
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}
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#endif
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#if GST_CLAPPER_GL_HAVE_X11_EGL
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if (GST_IS_GL_DISPLAY_EGL (self->gst_display)) {
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platform = GST_GL_PLATFORM_EGL;
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GST_INFO_OBJECT (self, "Using EGL on x11");
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goto have_display;
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}
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#endif
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#if GST_CLAPPER_GL_HAVE_X11_GLX
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if (GST_IS_GL_DISPLAY_X11 (self->gst_display)) {
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platform = GST_GL_PLATFORM_GLX;
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GST_INFO_OBJECT (self, "Using GLX on x11");
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goto have_display;
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}
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#endif
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g_clear_object (&self->gdk_context);
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gst_clear_object (&self->gst_display);
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GST_CLAPPER_GL_BASE_IMPORT_UNLOCK (self);
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GST_ERROR_OBJECT (self, "Unsupported GL platform");
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return FALSE;
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have_display:
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gdk_gl_context_make_current (self->gdk_context);
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self->wrapped_context = wrap_current_gl (self->gst_display, gdk_gl_api, platform);
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if (!self->wrapped_context) {
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GST_ERROR ("Could not retrieve Gdk OpenGL context");
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gdk_gl_context_clear_current ();
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g_clear_object (&self->gdk_context);
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gst_clear_object (&self->gst_display);
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GST_CLAPPER_GL_BASE_IMPORT_UNLOCK (self);
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return FALSE;
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}
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GST_INFO ("Retrieved Gdk OpenGL context %" GST_PTR_FORMAT, self->wrapped_context);
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gst_gl_context_activate (self->wrapped_context, TRUE);
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if (!gst_gl_context_fill_info (self->wrapped_context, &error)) {
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GST_ERROR ("Failed to fill Gdk context info: %s", error->message);
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g_clear_error (&error);
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gst_gl_context_activate (self->wrapped_context, FALSE);
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gst_clear_object (&self->wrapped_context);
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g_clear_object (&self->gdk_context);
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gst_clear_object (&self->gst_display);
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GST_CLAPPER_GL_BASE_IMPORT_UNLOCK (self);
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return FALSE;
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}
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gst_gl_context_get_gl_version (self->wrapped_context, &gl_major, &gl_minor);
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GST_INFO ("Using OpenGL%s %i.%i", (gdk_gl_api == GDK_GL_API_GLES) ? " ES" : "",
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gl_major, gl_minor);
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/* Deactivate in both places */
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gst_gl_context_activate (self->wrapped_context, FALSE);
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gdk_gl_context_clear_current ();
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GST_CLAPPER_GL_BASE_IMPORT_UNLOCK (self);
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return TRUE;
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}
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static gboolean
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ensure_gl_context (GstClapperGLBaseImport *self)
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{
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GstGLDisplay *gst_display = NULL;
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GstGLContext *gst_context = NULL;
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GError *error = NULL;
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gboolean has_gdk_contexts;
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GST_CLAPPER_GL_BASE_IMPORT_LOCK (self);
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has_gdk_contexts = (self->gdk_context && self->wrapped_context);
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GST_CLAPPER_GL_BASE_IMPORT_UNLOCK (self);
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if (!has_gdk_contexts) {
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if (!(! !gst_gtk_invoke_on_main (
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(GThreadFunc) (GCallback) retrieve_gl_context_on_main, self))) {
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GST_ERROR_OBJECT (self, "Could not retrieve Gdk GL context");
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return FALSE;
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}
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}
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GST_CLAPPER_GL_BASE_IMPORT_LOCK (self);
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gst_display = gst_object_ref (self->gst_display);
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/* GstGLDisplay operations require object lock to be held */
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GST_OBJECT_LOCK (gst_display);
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if (!self->gst_context) {
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GST_TRACE_OBJECT (self, "Creating new GstGLContext");
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if (!gst_gl_display_create_context (gst_display, self->wrapped_context,
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&self->gst_context, &error)) {
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GST_WARNING ("Could not create OpenGL context: %s",
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error ? error->message : "Unknown");
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g_clear_error (&error);
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GST_CLAPPER_GL_BASE_IMPORT_UNLOCK (self);
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return FALSE;
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}
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}
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gst_context = gst_object_ref (self->gst_context);
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GST_CLAPPER_GL_BASE_IMPORT_UNLOCK (self);
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/* Calls `set_context` internally, so we cannot be locked here */
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gst_gl_display_add_context (gst_display, gst_context);
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gst_gl_element_propagate_display_context (GST_ELEMENT_CAST (self), gst_display);
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GST_OBJECT_UNLOCK (gst_display);
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gst_object_unref (gst_display);
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gst_object_unref (gst_context);
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return TRUE;
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}
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static void
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gst_clapper_gl_base_import_set_context (GstElement *element, GstContext *context)
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{
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GstClapperGLBaseImport *self = GST_CLAPPER_GL_BASE_IMPORT_CAST (element);
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GST_DEBUG_OBJECT (self, "Set context");
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GST_CLAPPER_GL_BASE_IMPORT_LOCK (self);
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gst_gl_handle_set_context (element, context, &self->gst_display,
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&self->wrapped_context);
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GST_CLAPPER_GL_BASE_IMPORT_UNLOCK (self);
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GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
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}
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static GstStateChangeReturn
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gst_clapper_gl_base_import_change_state (GstElement *element, GstStateChange transition)
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{
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GstClapperGLBaseImport *self = GST_CLAPPER_GL_BASE_IMPORT_CAST (element);
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GstStateChangeReturn ret;
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (!ensure_gl_context (self))
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return GST_STATE_CHANGE_FAILURE;
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break;
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default:
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break;
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}
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return ret;
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}
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static gboolean
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gst_clapper_gl_base_import_query (GstBaseTransform *bt,
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GstPadDirection direction, GstQuery *query)
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{
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GstClapperGLBaseImport *self = GST_CLAPPER_GL_BASE_IMPORT_CAST (bt);
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gboolean res;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_CONTEXT:
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GST_CLAPPER_GL_BASE_IMPORT_LOCK (self);
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res = gst_gl_handle_context_query (GST_ELEMENT_CAST (self), query,
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self->gst_display, self->gst_context, self->wrapped_context);
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GST_CLAPPER_GL_BASE_IMPORT_UNLOCK (self);
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break;
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default:
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res = GST_BASE_TRANSFORM_CLASS (parent_class)->query (bt, direction, query);
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break;
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}
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return res;
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}
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static gboolean
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gst_clapper_gl_base_import_gdk_context_realize (GstClapperGLBaseImport *self, GdkGLContext *gdk_context)
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{
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GError *error = NULL;
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gboolean success;
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GST_DEBUG_OBJECT (self, "Realizing GdkGLContext with default implementation");
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gdk_gl_context_set_allowed_apis (gdk_context, GDK_GL_API_GLES);
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if (!(success = gdk_gl_context_realize (gdk_context, &error))) {
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GST_WARNING_OBJECT (self, "Could not realize Gdk context with GLES: %s", error->message);
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g_clear_error (&error);
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}
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if (!success) {
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gdk_gl_context_set_allowed_apis (gdk_context, GDK_GL_API_GL);
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if (!(success = gdk_gl_context_realize (gdk_context, &error))) {
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GST_WARNING_OBJECT (self, "Could not realize Gdk context with GL: %s", error->message);
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g_clear_error (&error);
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}
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}
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return success;
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}
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static void
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gst_clapper_gl_base_import_class_init (GstClapperGLBaseImportClass *klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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GstBaseTransformClass *gstbasetransform_class = (GstBaseTransformClass *) klass;
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GstClapperGLBaseImportClass *gl_bi_class = (GstClapperGLBaseImportClass *) klass;
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "clapperglbaseimport", 0,
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"Clapper GL Base Import");
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gobject_class->finalize = gst_clapper_gl_base_import_finalize;
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gstelement_class->set_context = gst_clapper_gl_base_import_set_context;
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gstelement_class->change_state = gst_clapper_gl_base_import_change_state;
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gstbasetransform_class->query = gst_clapper_gl_base_import_query;
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gl_bi_class->gdk_context_realize = gst_clapper_gl_base_import_gdk_context_realize;
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}
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