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This makes it possible to use the GStreamer OpenGL elements without a windowing system if a libdrm- and Mesa3D-supported GPU is present https://bugzilla.gnome.org/show_bug.cgi?id=782923
303 lines
8.7 KiB
C
303 lines
8.7 KiB
C
/*
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* GStreamer
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* Copyright (C) 2014 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstgldisplay_egl.h"
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#include <gst/gl/gstglfeature.h>
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#include "gstegl.h"
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#include "gsteglimage.h"
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#include "gstglmemoryegl.h"
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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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#ifndef EGL_PLATFORM_X11
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#define EGL_PLATFORM_X11 0x31D5
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#endif
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#ifndef EGL_PLATFORM_WAYLAND
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#define EGL_PLATFORM_WAYLAND 0x31D8
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#endif
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#ifndef EGL_PLATFORM_ANDROID
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#define EGL_PLATFORM_ANDROID 0x3141
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#endif
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typedef EGLDisplay (*_gst_eglGetPlatformDisplay_type) (EGLenum platform,
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void *native_display, const EGLint * attrib_list);
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G_DEFINE_TYPE (GstGLDisplayEGL, gst_gl_display_egl, GST_TYPE_GL_DISPLAY);
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static void gst_gl_display_egl_finalize (GObject * object);
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static guintptr gst_gl_display_egl_get_handle (GstGLDisplay * display);
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static void
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gst_gl_display_egl_class_init (GstGLDisplayEGLClass * klass)
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{
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GST_GL_DISPLAY_CLASS (klass)->get_handle =
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GST_DEBUG_FUNCPTR (gst_gl_display_egl_get_handle);
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G_OBJECT_CLASS (klass)->finalize = gst_gl_display_egl_finalize;
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}
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static void
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gst_gl_display_egl_init (GstGLDisplayEGL * display_egl)
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{
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GstGLDisplay *display = (GstGLDisplay *) display_egl;
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display->type = GST_GL_DISPLAY_TYPE_EGL;
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display_egl->foreign_display = FALSE;
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gst_gl_memory_egl_init_once ();
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}
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static void
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gst_gl_display_egl_finalize (GObject * object)
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{
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GstGLDisplayEGL *display_egl = GST_GL_DISPLAY_EGL (object);
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if (display_egl->display && !display_egl->foreign_display) {
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eglTerminate (display_egl->display);
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display_egl->display = NULL;
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}
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G_OBJECT_CLASS (gst_gl_display_egl_parent_class)->finalize (object);
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}
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/**
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* gst_gl_display_egl_get_from_native:
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* @type: a #GstGLDisplayType
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* @display: pointer to a display (or 0)
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*
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* Attempts to create a new #EGLDisplay from @display. If @type is
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* %GST_GL_DISPLAY_TYPE_ANY, then @display must be 0. @type must not be
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* %GST_GL_DISPLAY_TYPE_NONE.
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*
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* Returns: A #EGLDisplay or %EGL_NO_DISPLAY
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*
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* Since: 1.12
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*/
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gpointer
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gst_gl_display_egl_get_from_native (GstGLDisplayType type, guintptr display)
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{
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const gchar *egl_exts;
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EGLDisplay ret = EGL_NO_DISPLAY;
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_gst_eglGetPlatformDisplay_type _gst_eglGetPlatformDisplay;
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g_return_val_if_fail (type != GST_GL_DISPLAY_TYPE_NONE, EGL_NO_DISPLAY);
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g_return_val_if_fail ((type != GST_GL_DISPLAY_TYPE_ANY && display != 0)
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|| (type == GST_GL_DISPLAY_TYPE_ANY && display == 0), EGL_NO_DISPLAY);
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/* given an EGLDisplay already */
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if (type == GST_GL_DISPLAY_TYPE_EGL)
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return (gpointer) display;
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egl_exts = eglQueryString (EGL_NO_DISPLAY, EGL_EXTENSIONS);
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GST_DEBUG ("egl no display extensions: %s", egl_exts);
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if (eglGetError () != EGL_SUCCESS || !egl_exts)
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goto default_display;
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/* check if we can actually choose the egl display type */
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if (!gst_gl_check_extension ("EGL_KHR_client_get_all_proc_addresses",
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egl_exts))
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goto default_display;
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if (!gst_gl_check_extension ("EGL_EXT_platform_base", egl_exts))
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goto default_display;
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_gst_eglGetPlatformDisplay = (_gst_eglGetPlatformDisplay_type)
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eglGetProcAddress ("eglGetPlatformDisplay");
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if (!_gst_eglGetPlatformDisplay)
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_gst_eglGetPlatformDisplay = (_gst_eglGetPlatformDisplay_type)
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eglGetProcAddress ("eglGetPlatformDisplayEXT");
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if (!_gst_eglGetPlatformDisplay)
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goto default_display;
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/* try each platform in turn */
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#if GST_GL_HAVE_WINDOW_X11
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if (ret == EGL_NO_DISPLAY && (type & GST_GL_DISPLAY_TYPE_X11) &&
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(gst_gl_check_extension ("EGL_KHR_platform_x11", egl_exts) ||
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gst_gl_check_extension ("EGL_EXT_platform_x11", egl_exts))) {
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ret = _gst_eglGetPlatformDisplay (EGL_PLATFORM_X11, (gpointer) display,
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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 (ret == EGL_NO_DISPLAY && (type & GST_GL_DISPLAY_TYPE_WAYLAND) &&
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(gst_gl_check_extension ("EGL_KHR_platform_wayland", egl_exts) ||
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gst_gl_check_extension ("EGL_EXT_platform_wayland", egl_exts))) {
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ret = _gst_eglGetPlatformDisplay (EGL_PLATFORM_WAYLAND, (gpointer) display,
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NULL);
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}
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#endif
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#if GST_GL_HAVE_WINDOW_GBM
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if (ret == EGL_NO_DISPLAY && (type & GST_GL_DISPLAY_TYPE_GBM) &&
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(gst_gl_check_extension ("EGL_MESA_platform_gbm", egl_exts) ||
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gst_gl_check_extension ("EGL_MESA_platform_gbm", egl_exts))) {
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ret = _gst_eglGetPlatformDisplay (EGL_PLATFORM_GBM_MESA, (gpointer) display,
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NULL);
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}
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#endif
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/* android only has one winsys/display connection */
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if (ret != EGL_NO_DISPLAY)
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return ret;
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/* otherwise rely on the implementation to choose the correct display
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* based on the pointer */
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default_display:
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return (gpointer) eglGetDisplay ((EGLNativeDisplayType) display);
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}
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/**
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* gst_gl_display_egl_new:
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*
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* Create a new #GstGLDisplayEGL using the default EGL_DEFAULT_DISPLAY.
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*
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* Returns: (transfer full): a new #GstGLDisplayEGL or %NULL
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*/
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GstGLDisplayEGL *
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gst_gl_display_egl_new (void)
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{
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GstGLDisplayEGL *ret;
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GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
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ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL, NULL);
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gst_object_ref_sink (ret);
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ret->display =
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gst_gl_display_egl_get_from_native (GST_GL_DISPLAY_TYPE_ANY, 0);
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if (!ret->display) {
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GST_INFO ("Failed to open EGL display connection");
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}
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return ret;
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}
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/**
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* gst_gl_display_egl_new_with_display:
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* @display: an existing and connected EGLDisplay
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*
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* Creates a new display connection from a EGLDisplay.
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*
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* Returns: (transfer full): a new #GstGLDisplayEGL
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*
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* Since: 1.12
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*/
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GstGLDisplayEGL *
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gst_gl_display_egl_new_with_egl_display (gpointer display)
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{
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GstGLDisplayEGL *ret;
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g_return_val_if_fail (display != NULL, NULL);
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GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
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ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL, NULL);
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gst_object_ref_sink (ret);
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ret->display = display;
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ret->foreign_display = TRUE;
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return ret;
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}
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static gpointer
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_ref_if_set (gpointer data, gpointer user_data)
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{
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if (data)
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gst_object_ref (data);
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return data;
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}
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/**
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* gst_gl_display_egl_from_gl_display:
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* @display: an existing #GstGLDisplay
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*
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* Creates a EGL display connection from a native Display.
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*
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* This function will return the same value for multiple calls with the same
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* @display.
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*
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* Returns: (transfer full): a new #GstGLDisplayEGL
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*
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* Since: 1.12
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*/
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GstGLDisplayEGL *
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gst_gl_display_egl_from_gl_display (GstGLDisplay * display)
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{
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GstGLDisplayEGL *ret;
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GstGLDisplayType display_type;
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guintptr native_display;
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g_return_val_if_fail (GST_IS_GL_DISPLAY (display), NULL);
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GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
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if (GST_IS_GL_DISPLAY_EGL (display)) {
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GST_LOG_OBJECT (display, "display %" GST_PTR_FORMAT "is already a "
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"GstGLDisplayEGL", display);
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return gst_object_ref (display);
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}
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/* try to get a previously set GstGLDisplayEGL */
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ret = g_object_dup_data (G_OBJECT (display), GST_GL_DISPLAY_EGL_NAME,
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(GDuplicateFunc) _ref_if_set, NULL);
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if (ret && GST_IS_GL_DISPLAY_EGL (ret)) {
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GST_LOG_OBJECT (display, "display %" GST_PTR_FORMAT "already has a "
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"GstGLDisplayEGL %" GST_PTR_FORMAT, display, ret);
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return ret;
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}
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if (ret)
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gst_object_unref (ret);
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display_type = gst_gl_display_get_handle_type (display);
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native_display = gst_gl_display_get_handle (display);
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g_return_val_if_fail (native_display != 0, NULL);
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g_return_val_if_fail (display_type != GST_GL_DISPLAY_TYPE_NONE, NULL);
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ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL, NULL);
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gst_object_ref_sink (ret);
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ret->display =
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gst_gl_display_egl_get_from_native (display_type, native_display);
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if (!ret->display) {
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GST_WARNING_OBJECT (ret, "failed to get EGLDisplay from native display");
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gst_object_unref (ret);
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return NULL;
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}
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g_object_set_data_full (G_OBJECT (display), GST_GL_DISPLAY_EGL_NAME,
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gst_object_ref (ret), (GDestroyNotify) gst_object_unref);
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return ret;
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}
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static guintptr
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gst_gl_display_egl_get_handle (GstGLDisplay * display)
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{
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return (guintptr) GST_GL_DISPLAY_EGL (display)->display;
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}
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