gstreamer/gst-libs/gst/gl/egl/gstgldisplay_egl.c

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/*
* GStreamer
* Copyright (C) 2014 Matthew Waters <ystreet00@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstgldisplay_egl.h"
#include <gst/gl/gstglfeature.h>
#include "gstegl.h"
#include "gsteglimage.h"
#include "gstglmemoryegl.h"
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GST_DEBUG_CATEGORY_STATIC (gst_gl_display_debug);
#define GST_CAT_DEFAULT gst_gl_display_debug
#ifndef EGL_PLATFORM_X11
#define EGL_PLATFORM_X11 0x31D5
#endif
#ifndef EGL_PLATFORM_WAYLAND
#define EGL_PLATFORM_WAYLAND 0x31D8
#endif
#ifndef EGL_PLATFORM_ANDROID
#define EGL_PLATFORM_ANDROID 0x3141
#endif
typedef EGLDisplay (*_gst_eglGetPlatformDisplay_type) (EGLenum platform,
void *native_display, const EGLint * attrib_list);
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G_DEFINE_TYPE (GstGLDisplayEGL, gst_gl_display_egl, GST_TYPE_GL_DISPLAY);
static void gst_gl_display_egl_finalize (GObject * object);
static guintptr gst_gl_display_egl_get_handle (GstGLDisplay * display);
static void
gst_gl_display_egl_class_init (GstGLDisplayEGLClass * klass)
{
GST_GL_DISPLAY_CLASS (klass)->get_handle =
GST_DEBUG_FUNCPTR (gst_gl_display_egl_get_handle);
G_OBJECT_CLASS (klass)->finalize = gst_gl_display_egl_finalize;
}
static void
gst_gl_display_egl_init (GstGLDisplayEGL * display_egl)
{
GstGLDisplay *display = (GstGLDisplay *) display_egl;
display->type = GST_GL_DISPLAY_TYPE_EGL;
display_egl->foreign_display = FALSE;
gst_gl_memory_egl_init_once ();
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}
static void
gst_gl_display_egl_finalize (GObject * object)
{
GstGLDisplayEGL *display_egl = GST_GL_DISPLAY_EGL (object);
if (display_egl->display && !display_egl->foreign_display) {
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eglTerminate (display_egl->display);
display_egl->display = NULL;
}
G_OBJECT_CLASS (gst_gl_display_egl_parent_class)->finalize (object);
}
/**
* gst_gl_display_egl_get_from_native:
* @type: a #GstGLDisplayType
* @display: pointer to a display (or 0)
*
* Attempts to create a new #EGLDisplay from @display. If @type is
* %GST_GL_DISPLAY_TYPE_ANY, then @display must be 0.
*
* Returns: A #EGLDisplay or %EGL_NO_DISPLAY
*
* Since: 1.12
*/
gpointer
gst_gl_display_egl_get_from_native (GstGLDisplayType type, guintptr display)
{
const gchar *egl_exts;
EGLDisplay ret = EGL_NO_DISPLAY;
_gst_eglGetPlatformDisplay_type _gst_eglGetPlatformDisplay;
g_return_val_if_fail ((type != GST_GL_DISPLAY_TYPE_ANY && display != 0)
|| (type == GST_GL_DISPLAY_TYPE_ANY && display == 0), EGL_NO_DISPLAY);
g_return_val_if_fail ((type != GST_GL_DISPLAY_TYPE_NONE
|| (type == GST_GL_DISPLAY_TYPE_NONE
&& display == 0)), EGL_NO_DISPLAY);
/* given an EGLDisplay already */
if (type == GST_GL_DISPLAY_TYPE_EGL)
return (gpointer) display;
if (type == GST_GL_DISPLAY_TYPE_NONE)
type = GST_GL_DISPLAY_TYPE_ANY;
egl_exts = eglQueryString (EGL_NO_DISPLAY, EGL_EXTENSIONS);
GST_DEBUG ("egl no display extensions: %s", egl_exts);
if (eglGetError () != EGL_SUCCESS || !egl_exts)
goto default_display;
/* check if we can actually choose the egl display type */
if (!gst_gl_check_extension ("EGL_KHR_client_get_all_proc_addresses",
egl_exts))
goto default_display;
if (!gst_gl_check_extension ("EGL_EXT_platform_base", egl_exts))
goto default_display;
_gst_eglGetPlatformDisplay = (_gst_eglGetPlatformDisplay_type)
eglGetProcAddress ("eglGetPlatformDisplay");
if (!_gst_eglGetPlatformDisplay)
_gst_eglGetPlatformDisplay = (_gst_eglGetPlatformDisplay_type)
eglGetProcAddress ("eglGetPlatformDisplayEXT");
if (!_gst_eglGetPlatformDisplay)
goto default_display;
/* try each platform in turn */
#if GST_GL_HAVE_WINDOW_X11
if (ret == EGL_NO_DISPLAY && (type & GST_GL_DISPLAY_TYPE_X11) &&
(gst_gl_check_extension ("EGL_KHR_platform_x11", egl_exts) ||
gst_gl_check_extension ("EGL_EXT_platform_x11", egl_exts))) {
ret = _gst_eglGetPlatformDisplay (EGL_PLATFORM_X11, (gpointer) display,
NULL);
}
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND
if (ret == EGL_NO_DISPLAY && (type & GST_GL_DISPLAY_TYPE_WAYLAND) &&
(gst_gl_check_extension ("EGL_KHR_platform_wayland", egl_exts) ||
gst_gl_check_extension ("EGL_EXT_platform_wayland", egl_exts))) {
ret = _gst_eglGetPlatformDisplay (EGL_PLATFORM_WAYLAND, (gpointer) display,
NULL);
}
#endif
/* android only has one winsys/display connection */
if (ret != EGL_NO_DISPLAY)
return ret;
/* otherwise rely on the implementation to choose the correct display
* based on the pointer */
default_display:
return (gpointer) eglGetDisplay ((EGLNativeDisplayType) display);
}
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/**
* gst_gl_display_egl_new:
*
* Create a new #GstGLDisplayEGL using the default EGL_DEFAULT_DISPLAY.
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*
* Returns: (transfer full): a new #GstGLDisplayEGL or %NULL
*/
GstGLDisplayEGL *
gst_gl_display_egl_new (void)
{
GstGLDisplayEGL *ret;
GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL, NULL);
gst_object_ref_sink (ret);
ret->display =
gst_gl_display_egl_get_from_native (GST_GL_DISPLAY_TYPE_ANY, 0);
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if (!ret->display) {
GST_ERROR ("Failed to open EGL display connection");
}
return ret;
}
/**
* gst_gl_display_egl_new_with_display:
* @display: an existing and connected EGLDisplay
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*
* Creates a new display connection from a EGLDisplay.
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*
* Returns: (transfer full): a new #GstGLDisplayEGL
*
* Since: 1.12
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*/
GstGLDisplayEGL *
gst_gl_display_egl_new_with_egl_display (gpointer display)
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{
GstGLDisplayEGL *ret;
g_return_val_if_fail (display != NULL, NULL);
GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL, NULL);
gst_object_ref_sink (ret);
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ret->display = display;
ret->foreign_display = TRUE;
return ret;
}
static gpointer
_ref_if_set (gpointer data, gpointer user_data)
{
if (data)
gst_object_ref (data);
return data;
}
/**
* gst_gl_display_egl_from_gl_display:
* @display: an existing #GstGLDisplay
*
* Creates a EGL display connection from a native Display.
*
* This function will return the same value for multiple calls with the same
* @display.
*
* Returns: (transfer full): a new #GstGLDisplayEGL
*
* Since: 1.12
*/
GstGLDisplayEGL *
gst_gl_display_egl_from_gl_display (GstGLDisplay * display)
{
GstGLDisplayEGL *ret;
GstGLDisplayType display_type;
guintptr native_display;
g_return_val_if_fail (GST_IS_GL_DISPLAY (display), NULL);
GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
if (GST_IS_GL_DISPLAY_EGL (display)) {
GST_LOG_OBJECT (display, "display %" GST_PTR_FORMAT "is already a "
"GstGLDisplayEGL", display);
return gst_object_ref (display);
}
/* try to get a previously set GstGLDisplayEGL */
ret = g_object_dup_data (G_OBJECT (display), GST_GL_DISPLAY_EGL_NAME,
(GDuplicateFunc) _ref_if_set, NULL);
if (ret && GST_IS_GL_DISPLAY_EGL (ret)) {
GST_LOG_OBJECT (display, "display %" GST_PTR_FORMAT "already has a "
"GstGLDisplayEGL %" GST_PTR_FORMAT, display, ret);
return ret;
}
if (ret)
gst_object_unref (ret);
display_type = gst_gl_display_get_handle_type (display);
native_display = gst_gl_display_get_handle (display);
g_return_val_if_fail (native_display != 0, NULL);
g_return_val_if_fail (display_type != GST_GL_DISPLAY_TYPE_NONE, NULL);
ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL, NULL);
gst_object_ref_sink (ret);
ret->display =
gst_gl_display_egl_get_from_native (display_type, native_display);
if (!ret->display) {
GST_WARNING_OBJECT (ret, "failed to get EGLDisplay from native display");
gst_object_unref (ret);
return NULL;
}
g_object_set_data_full (G_OBJECT (display), GST_GL_DISPLAY_EGL_NAME,
gst_object_ref (ret), (GDestroyNotify) gst_object_unref);
return ret;
}
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static guintptr
gst_gl_display_egl_get_handle (GstGLDisplay * display)
{
return (guintptr) GST_GL_DISPLAY_EGL (display)->display;
}