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

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/*
* GStreamer
* Copyright (C) 2014 Matthew Waters <ystreet00@gmail.com>
* Copyright (C) 2019 Seungha Yang <seungha.yang@navercorp.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.
*/
/**
* SECTION:gstgldisplay_egl_device
* @short_description: EGL EGLDeviceEXT object
* @title: GstGLDisplayEGLDevice
* @see_also: #GstGLDisplay, #GstGLDisplayEGL
*
* #GstGLDisplayEGLDevice represents a `EGLDeviceEXT` handle created internally
* (gst_gl_display_egl_device_new()) or wrapped by the application
* (gst_gl_display_egl_device_new_with_egl_device())
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstgldisplay_egl.h"
#include "gstgldisplay_egl_device.h"
#include <gst/gl/gstglfeature.h>
#include "gstegl.h"
#include "gstglmemoryegl.h"
#ifndef EGL_DEVICE_EXT
typedef void *EGLDeviceEXT;
#endif
GST_DEBUG_CATEGORY_STATIC (gst_gl_display_debug);
#define GST_CAT_DEFAULT gst_gl_display_debug
typedef EGLBoolean (*eglQueryDevicesEXT_type) (EGLint max_devices,
EGLDeviceEXT * devices, EGLint * num_devices);
G_DEFINE_TYPE (GstGLDisplayEGLDevice, gst_gl_display_egl_device,
GST_TYPE_GL_DISPLAY);
static guintptr gst_gl_display_egl_device_get_handle (GstGLDisplay * display);
static void
gst_gl_display_egl_device_class_init (GstGLDisplayEGLDeviceClass * klass)
{
GstGLDisplayClass *display_class = GST_GL_DISPLAY_CLASS (klass);
display_class->get_handle =
GST_DEBUG_FUNCPTR (gst_gl_display_egl_device_get_handle);
}
static void
gst_gl_display_egl_device_init (GstGLDisplayEGLDevice * self)
{
GstGLDisplay *display = GST_GL_DISPLAY (self);
display->type = GST_GL_DISPLAY_TYPE_EGL_DEVICE;
gst_gl_memory_egl_init_once ();
}
static guintptr
gst_gl_display_egl_device_get_handle (GstGLDisplay * display)
{
GstGLDisplayEGLDevice *self = GST_GL_DISPLAY_EGL_DEVICE (display);
return (guintptr) self->device;
}
/**
* gst_gl_display_egl_device_new:
* @device_index: the index of device to use
*
* Create a new #GstGLDisplayEGLDevice with an EGLDevice supported device
*
* Returns: (transfer full): a new #GstGLDisplayEGLDevice or %NULL
*
* Since: 1.18
*/
GstGLDisplayEGLDevice *
gst_gl_display_egl_device_new (guint device_index)
{
GstGLDisplayEGLDevice *ret;
eglQueryDevicesEXT_type query_device_func;
EGLint num_devices = 0;
EGLDeviceEXT *device_list;
GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
query_device_func =
(eglQueryDevicesEXT_type) eglGetProcAddress ("eglQueryDevicesEXT");
if (!query_device_func) {
GST_ERROR ("eglQueryDevicesEXT is unavailable");
return NULL;
}
if (query_device_func (0, NULL, &num_devices) == EGL_FALSE) {
GST_ERROR ("eglQueryDevicesEXT fail");
return NULL;
} else if (num_devices < 1) {
GST_ERROR ("no EGLDevice supported device");
return NULL;
}
if (num_devices <= device_index) {
GST_ERROR ("requested index %d exceeds the number of devices %d",
device_index, num_devices);
return NULL;
}
device_list = g_alloca (sizeof (EGLDeviceEXT) * num_devices);
query_device_func (num_devices, device_list, &num_devices);
ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL_DEVICE, NULL);
gst_object_ref_sink (ret);
ret->device = device_list[device_index];
return ret;
}
/**
* gst_gl_display_egl_device_new_with_egl_device:
* @device: an existing EGLDeviceEXT
*
* Creates a new #GstGLDisplayEGLDevice with EGLDeviceEXT .
* The @device must be created using EGLDevice enumeration.
*
* Returns: (transfer full): a new #GstGLDisplayEGLDevice
*
* Since: 1.18
*/
GstGLDisplayEGLDevice *
gst_gl_display_egl_device_new_with_egl_device (gpointer device)
{
GstGLDisplayEGLDevice *ret;
g_return_val_if_fail (device != NULL, NULL);
GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL_DEVICE, NULL);
gst_object_ref_sink (ret);
ret->device = device;
return ret;
}