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796 lines
21 KiB
C
796 lines
21 KiB
C
/*
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* GStreamer
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* Copyright (C) 2007 David A. Schleef <ds@schleef.org>
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* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
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* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
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* Copyright (C) 2013 Matthew Waters <ystreet00@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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/**
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* SECTION:gstgldisplay
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* @short_description: window system display connection abstraction
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* @title: GstGLDisplay
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* @see_also: #GstContext, #GstGLContext, #GstGLWindow
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*
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* #GstGLDisplay represents a connection to the underlying windowing system.
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* Elements are required to make use of #GstContext to share and propogate
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* a #GstGLDisplay.
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*
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* There are a number of environment variables that influence the choice of
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* platform and window system specific functionality.
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* - GST_GL_WINDOW influences the window system to use. Common values are
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* 'x11', 'wayland', 'win32' or 'cocoa'.
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* - GST_GL_PLATFORM influences the OpenGL platform to use. Common values are
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* 'egl', 'glx', 'wgl' or 'cgl'.
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* - GST_GL_API influences the OpenGL API requested by the OpenGL platform.
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* Common values are 'opengl', 'opengl3' and 'gles2'.
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*
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* > Certain window systems require a special function to be called to
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* > initialize threading support. As this GStreamer GL library does not preclude
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* > concurrent access to the windowing system, it is strongly advised that
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* > applications ensure that threading support has been initialized before any
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* > other toolkit/library functionality is accessed. Failure to do so could
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* > result in sudden application abortion during execution. The most notably
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* > example of such a function is X11's XInitThreads\().
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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 "gl.h"
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#include "gstgldisplay.h"
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#if GST_GL_HAVE_WINDOW_COCOA
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#include <gst/gl/cocoa/gstgldisplay_cocoa.h>
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#endif
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#if GST_GL_HAVE_WINDOW_X11
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#include <gst/gl/x11/gstgldisplay_x11.h>
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#endif
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#if GST_GL_HAVE_WINDOW_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_PLATFORM_EGL
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#include <gst/gl/egl/gstgldisplay_egl.h>
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#include <gst/gl/egl/gsteglimage.h>
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#include <gst/gl/egl/gstglmemoryegl.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_GBM
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#include <gst/gl/gbm/gstgldisplay_gbm.h>
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#endif
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GST_DEBUG_CATEGORY_STATIC (gst_context);
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GST_DEBUG_CATEGORY_STATIC (gst_gl_display_debug);
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#define GST_CAT_DEFAULT gst_gl_display_debug
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enum
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{
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SIGNAL_0,
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CREATE_CONTEXT,
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LAST_SIGNAL
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};
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static guint gst_gl_display_signals[LAST_SIGNAL] = { 0 };
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static void gst_gl_display_dispose (GObject * object);
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static void gst_gl_display_finalize (GObject * object);
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static guintptr gst_gl_display_default_get_handle (GstGLDisplay * display);
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static GstGLWindow *gst_gl_display_default_create_window (GstGLDisplay *
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display);
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struct _GstGLDisplayPrivate
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{
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GstGLAPI gl_api;
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GList *contexts;
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GThread *event_thread;
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GMutex thread_lock;
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GCond thread_cond;
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};
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#define DEBUG_INIT \
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GST_DEBUG_CATEGORY_INIT (gst_gl_display_debug, "gldisplay", 0, "opengl display"); \
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GST_DEBUG_CATEGORY_GET (gst_context, "GST_CONTEXT");
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G_DEFINE_TYPE_WITH_CODE (GstGLDisplay, gst_gl_display, GST_TYPE_OBJECT,
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G_ADD_PRIVATE (GstGLDisplay)
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DEBUG_INIT);
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static gboolean
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_unlock_main_thread (GstGLDisplay * display)
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{
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g_mutex_unlock (&display->priv->thread_lock);
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return G_SOURCE_REMOVE;
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}
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static gpointer
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_event_thread_main (GstGLDisplay * display)
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{
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g_mutex_lock (&display->priv->thread_lock);
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display->main_context = g_main_context_new ();
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display->main_loop = g_main_loop_new (display->main_context, FALSE);
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g_main_context_invoke (display->main_context,
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(GSourceFunc) _unlock_main_thread, display);
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g_cond_broadcast (&display->priv->thread_cond);
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g_main_loop_run (display->main_loop);
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g_mutex_lock (&display->priv->thread_lock);
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g_main_loop_unref (display->main_loop);
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g_main_context_unref (display->main_context);
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display->main_loop = NULL;
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display->main_context = NULL;
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g_cond_broadcast (&display->priv->thread_cond);
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g_mutex_unlock (&display->priv->thread_lock);
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return NULL;
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}
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static void
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gst_gl_display_class_init (GstGLDisplayClass * klass)
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{
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/**
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* GstGLDisplay::create-context:
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* @object: the #GstGLDisplay
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* @context: (transfer none): other context to share resources with.
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*
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* Overrides the @GstGLContext creation mechanism.
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* It can be called in any thread and it is emitted with
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* display's object lock held.
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*
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* Returns: (transfer full): the new context.
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*/
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gst_gl_display_signals[CREATE_CONTEXT] =
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g_signal_new ("create-context", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
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GST_TYPE_GL_CONTEXT, 1, GST_TYPE_GL_CONTEXT);
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klass->get_handle = gst_gl_display_default_get_handle;
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klass->create_window = gst_gl_display_default_create_window;
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G_OBJECT_CLASS (klass)->finalize = gst_gl_display_finalize;
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G_OBJECT_CLASS (klass)->dispose = gst_gl_display_dispose;
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}
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static void
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gst_gl_display_init (GstGLDisplay * display)
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{
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display->priv = gst_gl_display_get_instance_private (display);
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display->type = GST_GL_DISPLAY_TYPE_ANY;
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display->priv->gl_api = GST_GL_API_ANY;
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g_mutex_init (&display->priv->thread_lock);
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g_cond_init (&display->priv->thread_cond);
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display->priv->event_thread = g_thread_new ("gldisplay-event",
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(GThreadFunc) _event_thread_main, display);
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g_mutex_lock (&display->priv->thread_lock);
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while (!display->main_loop)
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g_cond_wait (&display->priv->thread_cond, &display->priv->thread_lock);
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g_mutex_unlock (&display->priv->thread_lock);
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GST_TRACE ("init %p", display);
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gst_gl_buffer_init_once ();
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gst_gl_memory_pbo_init_once ();
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gst_gl_renderbuffer_init_once ();
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#if GST_GL_HAVE_PLATFORM_EGL
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gst_gl_memory_egl_init_once ();
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#endif
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}
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static void
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gst_gl_display_dispose (GObject * object)
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{
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GstGLDisplay *display = GST_GL_DISPLAY (object);
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if (display->main_loop)
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g_main_loop_quit (display->main_loop);
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if (display->priv->event_thread) {
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/* can't use g_thread_join() as we could lose the last ref from a user
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* function */
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g_mutex_lock (&display->priv->thread_lock);
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while (display->main_loop)
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g_cond_wait (&display->priv->thread_cond, &display->priv->thread_lock);
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g_mutex_unlock (&display->priv->thread_lock);
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g_thread_unref (display->priv->event_thread);
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}
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display->priv->event_thread = NULL;
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if (display->event_source) {
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g_source_destroy (display->event_source);
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g_source_unref (display->event_source);
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}
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display->event_source = NULL;
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G_OBJECT_CLASS (gst_gl_display_parent_class)->dispose (object);
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}
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static void
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gst_gl_display_finalize (GObject * object)
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{
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GstGLDisplay *display = GST_GL_DISPLAY (object);
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GList *l;
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GST_TRACE_OBJECT (object, "finalizing");
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for (l = display->priv->contexts; l; l = l->next) {
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g_weak_ref_clear ((GWeakRef *) l->data);
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g_free (l->data);
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}
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g_list_free (display->windows);
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g_list_free (display->priv->contexts);
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g_cond_clear (&display->priv->thread_cond);
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g_mutex_clear (&display->priv->thread_lock);
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G_OBJECT_CLASS (gst_gl_display_parent_class)->finalize (object);
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}
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/**
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* gst_gl_display_new:
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*
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* Returns: (transfer full): a new #GstGLDisplay
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*
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* Since: 1.4
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*/
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GstGLDisplay *
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gst_gl_display_new (void)
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{
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GstGLDisplay *display = NULL;
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const gchar *user_choice, *platform_choice;
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static volatile gsize _init = 0;
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if (g_once_init_enter (&_init)) {
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GST_DEBUG_CATEGORY_INIT (gst_gl_display_debug, "gldisplay", 0,
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"gldisplay element");
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g_once_init_leave (&_init, 1);
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}
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user_choice = g_getenv ("GST_GL_WINDOW");
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platform_choice = g_getenv ("GST_GL_PLATFORM");
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GST_INFO ("creating a display, user choice:%s (platform: %s)",
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GST_STR_NULL (user_choice), GST_STR_NULL (platform_choice));
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#if GST_GL_HAVE_WINDOW_COCOA
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if (!display && (!user_choice || g_strstr_len (user_choice, 5, "cocoa"))) {
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display = GST_GL_DISPLAY (gst_gl_display_cocoa_new ());
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if (!display)
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return NULL;
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}
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#endif
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#if GST_GL_HAVE_WINDOW_WAYLAND
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if (!display && (!user_choice || g_strstr_len (user_choice, 7, "wayland")))
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display = GST_GL_DISPLAY (gst_gl_display_wayland_new (NULL));
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#endif
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#if GST_GL_HAVE_WINDOW_X11
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if (!display && (!user_choice || g_strstr_len (user_choice, 3, "x11")))
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display = GST_GL_DISPLAY (gst_gl_display_x11_new (NULL));
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#endif
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#if GST_GL_HAVE_WINDOW_VIV_FB
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if (!display && (!user_choice || g_strstr_len (user_choice, 6, "viv-fb"))) {
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const gchar *disp_idx_str = NULL;
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gint disp_idx = 0;
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disp_idx_str = g_getenv ("GST_GL_VIV_FB");
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if (disp_idx_str) {
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gint64 v = g_ascii_strtoll (disp_idx_str, NULL, 10);
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if (v >= G_MININT && v <= G_MAXINT)
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disp_idx = v;
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}
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display = GST_GL_DISPLAY (gst_gl_display_viv_fb_new (disp_idx));
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}
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#endif
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#if GST_GL_HAVE_WINDOW_GBM
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if (!display && (!user_choice || g_strstr_len (user_choice, 3, "gbm"))) {
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display = GST_GL_DISPLAY (gst_gl_display_gbm_new ());
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}
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#endif
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#if GST_GL_HAVE_PLATFORM_EGL
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if (!display && (!platform_choice
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|| g_strstr_len (platform_choice, 3, "egl")))
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display = GST_GL_DISPLAY (gst_gl_display_egl_new ());
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#endif
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if (!display) {
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GST_INFO ("Could not create platform/winsys display. user specified %s "
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"(platform: %s), creating dummy",
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GST_STR_NULL (user_choice), GST_STR_NULL (platform_choice));
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display = g_object_new (GST_TYPE_GL_DISPLAY, NULL);
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gst_object_ref_sink (display);
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}
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return display;
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}
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/**
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* gst_gl_display_get_handle:
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* @display: a #GstGLDisplay
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*
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* Returns: the native handle for the display
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*
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* Since: 1.4
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*/
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guintptr
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gst_gl_display_get_handle (GstGLDisplay * display)
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{
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GstGLDisplayClass *klass;
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g_return_val_if_fail (GST_IS_GL_DISPLAY (display), 0);
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klass = GST_GL_DISPLAY_GET_CLASS (display);
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g_return_val_if_fail (klass->get_handle != NULL, 0);
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return klass->get_handle (display);
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}
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static guintptr
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gst_gl_display_default_get_handle (GstGLDisplay * display)
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{
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return 0;
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}
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/**
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* gst_gl_display_filter_gl_api:
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* @display: a #GstGLDisplay
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* @gl_api: a #GstGLAPI to filter with
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*
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* limit the use of OpenGL to the requested @gl_api. This is intended to allow
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* application and elements to request a specific set of OpenGL API's based on
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* what they support. See gst_gl_context_get_gl_api() for the retreiving the
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* API supported by a #GstGLContext.
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*/
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void
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gst_gl_display_filter_gl_api (GstGLDisplay * display, GstGLAPI gl_api)
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{
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gchar *gl_api_s;
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g_return_if_fail (GST_IS_GL_DISPLAY (display));
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gl_api_s = gst_gl_api_to_string (gl_api);
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GST_TRACE_OBJECT (display, "filtering with api %s", gl_api_s);
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g_free (gl_api_s);
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GST_OBJECT_LOCK (display);
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display->priv->gl_api &= gl_api;
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GST_OBJECT_UNLOCK (display);
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}
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GstGLAPI
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gst_gl_display_get_gl_api_unlocked (GstGLDisplay * display)
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{
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g_return_val_if_fail (GST_IS_GL_DISPLAY (display), GST_GL_API_NONE);
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return display->priv->gl_api;
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}
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/**
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* gst_gl_display_get_gl_api:
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* @display: a #GstGLDisplay
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*
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* see gst_gl_display_filter_gl_api() for what the returned value represents
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*
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* Returns: the #GstGLAPI configured for @display
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*/
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GstGLAPI
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gst_gl_display_get_gl_api (GstGLDisplay * display)
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{
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GstGLAPI ret;
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g_return_val_if_fail (GST_IS_GL_DISPLAY (display), GST_GL_API_NONE);
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GST_OBJECT_LOCK (display);
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ret = display->priv->gl_api;
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GST_OBJECT_UNLOCK (display);
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return ret;
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}
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/**
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* gst_gl_display_get_handle_type:
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* @display: a #GstGLDisplay
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*
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* Returns: the #GstGLDisplayType of @display
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*
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* Since: 1.4
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*/
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GstGLDisplayType
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gst_gl_display_get_handle_type (GstGLDisplay * display)
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{
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g_return_val_if_fail (GST_IS_GL_DISPLAY (display), GST_GL_DISPLAY_TYPE_NONE);
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return display->type;
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}
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/**
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* gst_context_set_gl_display:
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* @context: a #GstContext
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* @display: (transfer none): resulting #GstGLDisplay
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*
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* Sets @display on @context
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*
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* Since: 1.4
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*/
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void
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gst_context_set_gl_display (GstContext * context, GstGLDisplay * display)
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{
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GstStructure *s;
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g_return_if_fail (context != NULL);
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if (display)
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GST_CAT_LOG (gst_context,
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"setting GstGLDisplay(%" GST_PTR_FORMAT ") on context(%" GST_PTR_FORMAT
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")", display, context);
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s = gst_context_writable_structure (context);
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gst_structure_set (s, GST_GL_DISPLAY_CONTEXT_TYPE, GST_TYPE_GL_DISPLAY,
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display, NULL);
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}
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/**
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* gst_context_get_gl_display:
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* @context: a #GstContext
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* @display: (out) (transfer full): resulting #GstGLDisplay
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*
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* Returns: Whether @display was in @context
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*
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* Since: 1.4
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*/
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gboolean
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gst_context_get_gl_display (GstContext * context, GstGLDisplay ** display)
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{
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const GstStructure *s;
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gboolean ret;
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g_return_val_if_fail (display != NULL, FALSE);
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g_return_val_if_fail (context != NULL, FALSE);
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s = gst_context_get_structure (context);
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ret = gst_structure_get (s, GST_GL_DISPLAY_CONTEXT_TYPE,
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GST_TYPE_GL_DISPLAY, display, NULL);
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|
|
GST_CAT_LOG (gst_context, "got GstGLDisplay(%p) from context(%p)", *display,
|
|
context);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_gl_display_create_context:
|
|
* @display: a #GstGLDisplay
|
|
* @other_context: (transfer none): other #GstGLContext to share resources with.
|
|
* @p_context: (transfer full) (out): resulting #GstGLContext
|
|
* @error: (allow-none): resulting #GError
|
|
*
|
|
* It requires the display's object lock to be held.
|
|
*
|
|
* Returns: whether a new context could be created.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
gboolean
|
|
gst_gl_display_create_context (GstGLDisplay * display,
|
|
GstGLContext * other_context, GstGLContext ** p_context, GError ** error)
|
|
{
|
|
GstGLContext *context = NULL;
|
|
gboolean ret = FALSE;
|
|
|
|
g_return_val_if_fail (display != NULL, FALSE);
|
|
g_return_val_if_fail (p_context != NULL, FALSE);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
|
|
|
g_signal_emit (display, gst_gl_display_signals[CREATE_CONTEXT], 0,
|
|
other_context, &context);
|
|
|
|
if (context) {
|
|
*p_context = context;
|
|
return TRUE;
|
|
}
|
|
|
|
context = gst_gl_context_new (display);
|
|
if (!context) {
|
|
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
|
|
"Failed to create GL context");
|
|
return FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (display,
|
|
"creating context %" GST_PTR_FORMAT " from other context %"
|
|
GST_PTR_FORMAT, context, other_context);
|
|
|
|
ret = gst_gl_context_create (context, other_context, error);
|
|
|
|
if (ret)
|
|
*p_context = context;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_gl_display_create_window:
|
|
* @display: a #GstGLDisplay
|
|
*
|
|
* It requires the display's object lock to be held.
|
|
*
|
|
* Returns: (transfer full): a new #GstGLWindow for @display or %NULL.
|
|
*/
|
|
GstGLWindow *
|
|
gst_gl_display_create_window (GstGLDisplay * display)
|
|
{
|
|
GstGLDisplayClass *klass;
|
|
GstGLWindow *window;
|
|
|
|
g_return_val_if_fail (GST_IS_GL_DISPLAY (display), NULL);
|
|
klass = GST_GL_DISPLAY_GET_CLASS (display);
|
|
g_return_val_if_fail (klass->create_window != NULL, NULL);
|
|
|
|
window = klass->create_window (display);
|
|
|
|
if (window)
|
|
display->windows = g_list_prepend (display->windows, window);
|
|
|
|
return window;
|
|
}
|
|
|
|
static GstGLWindow *
|
|
gst_gl_display_default_create_window (GstGLDisplay * display)
|
|
{
|
|
return gst_gl_window_new (display);
|
|
}
|
|
|
|
/**
|
|
* gst_gl_display_remove_window:
|
|
* @display: a #GstGLDisplay
|
|
* @window: a #GstGLWindow to remove
|
|
*
|
|
* Returns: if @window could be removed from @display
|
|
*
|
|
* Since: 1.12
|
|
*/
|
|
gboolean
|
|
gst_gl_display_remove_window (GstGLDisplay * display, GstGLWindow * window)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GList *l;
|
|
|
|
GST_OBJECT_LOCK (display);
|
|
l = g_list_find (display->windows, window);
|
|
if (l) {
|
|
display->windows = g_list_delete_link (display->windows, l);
|
|
ret = TRUE;
|
|
}
|
|
GST_OBJECT_UNLOCK (display);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_gl_display_find_window:
|
|
* @display: a #GstGLDisplay
|
|
* @data: (closure): some data to pass to @compare_func
|
|
* @compare_func: (scope call): a comparison function to run
|
|
*
|
|
* Execute @compare_func over the list of windows stored by @display. The
|
|
* first argment to @compare_func is the #GstGLWindow being checked and the
|
|
* second argument is @data.
|
|
*
|
|
* Returns: (transfer none): The first #GstGLWindow that causes a match
|
|
* from @compare_func
|
|
*
|
|
* Since: 1.12
|
|
*/
|
|
GstGLWindow *
|
|
gst_gl_display_find_window (GstGLDisplay * display, gpointer data,
|
|
GCompareFunc compare_func)
|
|
{
|
|
GstGLWindow *ret = NULL;
|
|
GList *l;
|
|
|
|
GST_OBJECT_LOCK (display);
|
|
l = g_list_find_custom (display->windows, data, compare_func);
|
|
if (l)
|
|
ret = l->data;
|
|
GST_OBJECT_UNLOCK (display);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstGLContext *
|
|
_get_gl_context_for_thread_unlocked (GstGLDisplay * display, GThread * thread)
|
|
{
|
|
GstGLContext *context = NULL;
|
|
GList *prev = NULL, *l = display->priv->contexts;
|
|
|
|
while (l) {
|
|
GWeakRef *ref = l->data;
|
|
GThread *context_thread;
|
|
|
|
context = g_weak_ref_get (ref);
|
|
if (!context) {
|
|
/* remove dead contexts */
|
|
g_weak_ref_clear (l->data);
|
|
g_free (l->data);
|
|
display->priv->contexts = g_list_delete_link (display->priv->contexts, l);
|
|
l = prev ? prev->next : display->priv->contexts;
|
|
continue;
|
|
}
|
|
|
|
if (thread == NULL) {
|
|
GST_DEBUG_OBJECT (display, "Returning GL context %" GST_PTR_FORMAT " for "
|
|
"NULL thread", context);
|
|
return context;
|
|
}
|
|
|
|
context_thread = gst_gl_context_get_thread (context);
|
|
if (thread != context_thread) {
|
|
g_thread_unref (context_thread);
|
|
gst_object_unref (context);
|
|
prev = l;
|
|
l = l->next;
|
|
continue;
|
|
}
|
|
|
|
if (context_thread)
|
|
g_thread_unref (context_thread);
|
|
|
|
GST_DEBUG_OBJECT (display, "Returning GL context %" GST_PTR_FORMAT " for "
|
|
"thread %p", context, thread);
|
|
return context;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (display, "No GL context for thread %p", thread);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gst_gl_display_get_gl_context_for_thread:
|
|
* @display: a #GstGLDisplay
|
|
* @thread: a #GThread
|
|
*
|
|
* Returns: (transfer full): the #GstGLContext current on @thread or %NULL
|
|
*
|
|
* Must be called with the object lock held.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
GstGLContext *
|
|
gst_gl_display_get_gl_context_for_thread (GstGLDisplay * display,
|
|
GThread * thread)
|
|
{
|
|
GstGLContext *context;
|
|
|
|
g_return_val_if_fail (GST_IS_GL_DISPLAY (display), NULL);
|
|
|
|
context = _get_gl_context_for_thread_unlocked (display, thread);
|
|
GST_DEBUG_OBJECT (display, "returning context %" GST_PTR_FORMAT " for thread "
|
|
"%p", context, thread);
|
|
|
|
return context;
|
|
}
|
|
|
|
static gboolean
|
|
_check_collision (GstGLContext * context, GstGLContext * collision)
|
|
{
|
|
GThread *thread, *collision_thread;
|
|
gboolean ret = FALSE;
|
|
|
|
if (!context || !collision)
|
|
return FALSE;
|
|
|
|
thread = gst_gl_context_get_thread (context);
|
|
collision_thread = gst_gl_context_get_thread (collision);
|
|
|
|
if (!thread || !collision_thread) {
|
|
ret = FALSE;
|
|
goto out;
|
|
}
|
|
|
|
if (thread == collision_thread) {
|
|
ret = TRUE;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
if (thread)
|
|
g_thread_unref (thread);
|
|
if (collision_thread)
|
|
g_thread_unref (collision_thread);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_gl_display_add_context:
|
|
* @display: a #GstGLDisplay
|
|
* @context: (transfer none): a #GstGLContext
|
|
*
|
|
* Returns: whether @context was successfully added. %FALSE may be returned
|
|
* if there already exists another context for @context's active thread.
|
|
*
|
|
* Must be called with the object lock held.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
gboolean
|
|
gst_gl_display_add_context (GstGLDisplay * display, GstGLContext * context)
|
|
{
|
|
GstGLContext *collision = NULL;
|
|
GstGLDisplay *context_display;
|
|
gboolean ret = TRUE;
|
|
GThread *thread;
|
|
GWeakRef *ref;
|
|
|
|
g_return_val_if_fail (GST_IS_GL_DISPLAY (display), FALSE);
|
|
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
|
|
|
|
context_display = gst_gl_context_get_display (context);
|
|
g_assert (context_display == display);
|
|
gst_object_unref (context_display);
|
|
|
|
thread = gst_gl_context_get_thread (context);
|
|
if (thread) {
|
|
collision = _get_gl_context_for_thread_unlocked (display, thread);
|
|
g_thread_unref (thread);
|
|
|
|
/* adding the same context is a no-op */
|
|
if (context == collision) {
|
|
GST_LOG_OBJECT (display, "Attempting to add the same GL context %"
|
|
GST_PTR_FORMAT ". Ignoring", context);
|
|
ret = TRUE;
|
|
goto out;
|
|
}
|
|
|
|
if (_check_collision (context, collision)) {
|
|
GST_DEBUG_OBJECT (display, "Collision detected adding GL context "
|
|
"%" GST_PTR_FORMAT, context);
|
|
ret = FALSE;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ref = g_new0 (GWeakRef, 1);
|
|
g_weak_ref_init (ref, context);
|
|
|
|
GST_DEBUG_OBJECT (display, "Adding GL context %" GST_PTR_FORMAT, context);
|
|
display->priv->contexts = g_list_prepend (display->priv->contexts, ref);
|
|
|
|
out:
|
|
if (collision)
|
|
gst_object_unref (collision);
|
|
|
|
GST_DEBUG_OBJECT (display, "%ssuccessfully inserted context %" GST_PTR_FORMAT,
|
|
ret ? "" : "un", context);
|
|
|
|
return ret;
|
|
}
|