gstreamer/gst-libs/gst/gl/x11/gstglwindow_x11_egl.c

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/*
* GStreamer
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2012 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.
*/
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglwindow_x11_egl.h"
const gchar *X11EGLErrorString ();
#define GST_CAT_DEFAULT gst_gl_window_debug
#define gst_gl_window_x11_egl_parent_class parent_class
G_DEFINE_TYPE (GstGLWindowX11EGL, gst_gl_window_x11_egl,
GST_GL_TYPE_WINDOW_X11);
static guintptr gst_gl_window_x11_egl_get_gl_context (GstGLWindowX11 *
window_x11);
static void gst_gl_window_x11_egl_swap_buffers (GstGLWindowX11 * window_x11);
static gboolean gst_gl_window_x11_egl_activate (GstGLWindowX11 * window_x11,
gboolean activate);
static gboolean gst_gl_window_x11_egl_create_context (GstGLWindowX11 *
window_x11, GstGLAPI gl_api, guintptr external_gl_context, GError ** error);
static void gst_gl_window_x11_egl_destroy_context (GstGLWindowX11 * window_x11);
static gboolean gst_gl_window_x11_egl_choose_format (GstGLWindowX11 *
window_x11, GError ** error);
GstGLAPI gst_gl_window_x11_egl_get_gl_api (GstGLWindow * window);
static gpointer gst_gl_window_x11_egl_get_proc_address (GstGLWindow * window,
const gchar * name);
static void
gst_gl_window_x11_egl_class_init (GstGLWindowX11EGLClass * klass)
{
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
GstGLWindowX11Class *window_x11_class = (GstGLWindowX11Class *) klass;
window_x11_class->get_gl_context =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_egl_get_gl_context);
window_x11_class->activate =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_egl_activate);
window_x11_class->create_context =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_egl_create_context);
window_x11_class->destroy_context =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_egl_destroy_context);
window_x11_class->choose_format =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_egl_choose_format);
window_x11_class->swap_buffers =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_egl_swap_buffers);
window_class->get_gl_api =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_egl_get_gl_api);
window_class->get_proc_address =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_egl_get_proc_address);
}
static void
gst_gl_window_x11_egl_init (GstGLWindowX11EGL * window)
{
}
/* Must be called in the gl thread */
GstGLWindowX11EGL *
gst_gl_window_x11_egl_new (void)
{
GstGLWindowX11EGL *window = g_object_new (GST_GL_TYPE_WINDOW_X11_EGL, NULL);
return window;
}
static gboolean
gst_gl_window_x11_egl_choose_format (GstGLWindowX11 * window_x11,
GError ** error)
{
gint ret;
window_x11->visual_info = g_new0 (XVisualInfo, 1);
ret = XMatchVisualInfo (window_x11->device, window_x11->screen_num,
window_x11->depth, TrueColor, window_x11->visual_info);
if (ret == 0) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_WRONG_CONFIG,
"Failed to match XVisualInfo");
return FALSE;
}
return TRUE;
}
static gboolean
_gst_gl_window_x11_egl_choose_config (GstGLWindowX11EGL * window_egl,
GError ** error)
{
EGLint numConfigs;
gint i = 0;
EGLint config_attrib[20];
config_attrib[i++] = EGL_SURFACE_TYPE;
config_attrib[i++] = EGL_WINDOW_BIT;
config_attrib[i++] = EGL_RENDERABLE_TYPE;
if (window_egl->gl_api & GST_GL_API_GLES2)
config_attrib[i++] = EGL_OPENGL_ES2_BIT;
else
config_attrib[i++] = EGL_OPENGL_BIT;
config_attrib[i++] = EGL_DEPTH_SIZE;
config_attrib[i++] = 16;
config_attrib[i++] = EGL_NONE;
if (eglChooseConfig (window_egl->egl_display, config_attrib,
&window_egl->egl_config, 1, &numConfigs))
GST_INFO ("config set: %ld, %ld", (gulong) window_egl->egl_config,
(gulong) numConfigs);
else {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_WRONG_CONFIG,
"Failed to set window configuration: %s", X11EGLErrorString ());
goto failure;
}
return TRUE;
failure:
return FALSE;
}
static gboolean
gst_gl_window_x11_egl_create_context (GstGLWindowX11 * window_x11,
GstGLAPI gl_api, guintptr external_gl_context, GError ** error)
{
GstGLWindowX11EGL *window_egl;
gint i = 0;
EGLint context_attrib[3];
EGLint majorVersion;
EGLint minorVersion;
if ((gl_api & GST_GL_API_OPENGL) == GST_GL_API_NONE &&
(gl_api & GST_GL_API_GLES2) == GST_GL_API_NONE) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_WRONG_API,
"xEGL supports opengl or gles2");
goto failure;
}
window_egl = GST_GL_WINDOW_X11_EGL (window_x11);
window_egl->egl_display =
eglGetDisplay ((EGLNativeDisplayType) window_x11->device);
if (eglInitialize (window_egl->egl_display, &majorVersion, &minorVersion))
GST_INFO ("egl initialized, version: %d.%d", majorVersion, minorVersion);
else {
g_set_error (error, GST_GL_WINDOW_ERROR,
GST_GL_WINDOW_ERROR_RESOURCE_UNAVAILABLE,
"Failed to initialize egl: %s", X11EGLErrorString ());
goto failure;
}
if (gl_api & GST_GL_API_OPENGL) {
/* egl + opengl only available with EGL 1.4+ */
if (majorVersion == 1 && minorVersion <= 3) {
if ((gl_api & ~GST_GL_API_OPENGL) == GST_GL_API_NONE) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_OLD_LIBS,
"EGL version (%i.%i) too old for OpenGL support, (needed at least 1.4)",
majorVersion, minorVersion);
goto failure;
} else {
GST_WARNING
("EGL version (%i.%i) too old for OpenGL support, (needed at least 1.4)",
majorVersion, minorVersion);
if (gl_api & GST_GL_API_GLES2) {
goto try_gles2;
} else {
g_set_error (error, GST_GL_WINDOW_ERROR,
GST_GL_WINDOW_ERROR_WRONG_CONFIG,
"Failed to choose a suitable OpenGL API");
goto failure;
}
}
}
if (!eglBindAPI (EGL_OPENGL_API)) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_FAILED,
"Failed to bind OpenGL|ES API: %s", X11EGLErrorString ());
goto failure;
}
window_egl->gl_api = GST_GL_API_OPENGL;
} else if (gl_api & GST_GL_API_GLES2) {
try_gles2:
if (!eglBindAPI (EGL_OPENGL_ES_API)) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_FAILED,
"Failed to bind OpenGL|ES API: %s", X11EGLErrorString ());
goto failure;
}
window_egl->gl_api = GST_GL_API_GLES2;
}
if (!_gst_gl_window_x11_egl_choose_config (window_egl, error)) {
g_assert (error == NULL || *error != NULL);
goto failure;
}
window_egl->egl_surface =
eglCreateWindowSurface (window_egl->egl_display, window_egl->egl_config,
(EGLNativeWindowType) window_x11->internal_win_id, NULL);
if (window_egl->egl_surface != EGL_NO_SURFACE)
GST_INFO ("surface created");
else {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_FAILED,
"Failed to create window surface: %s", X11EGLErrorString ());
goto failure;
}
GST_DEBUG ("about to create gl context\n");
if (window_egl->gl_api & GST_GL_API_GLES2) {
context_attrib[i++] = EGL_CONTEXT_CLIENT_VERSION;
context_attrib[i++] = 2;
}
context_attrib[i++] = EGL_NONE;
window_egl->egl_context =
eglCreateContext (window_egl->egl_display, window_egl->egl_config,
(EGLContext) external_gl_context, context_attrib);
if (window_egl->egl_context != EGL_NO_CONTEXT)
GST_INFO ("gl context created: %ld", (gulong) window_egl->egl_context);
else {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_CREATE_CONTEXT,
"Failed to create a OpenGL context: %s", X11EGLErrorString ());
goto failure;
}
return TRUE;
failure:
return FALSE;
}
static void
gst_gl_window_x11_egl_destroy_context (GstGLWindowX11 * window_x11)
{
GstGLWindowX11EGL *window_egl;
window_egl = GST_GL_WINDOW_X11_EGL (window_x11);
if (window_egl->egl_context)
eglDestroyContext (window_x11->device, window_egl->egl_context);
if (window_x11->device)
eglTerminate (window_x11->device);
}
static gboolean
gst_gl_window_x11_egl_activate (GstGLWindowX11 * window_x11, gboolean activate)
{
gboolean result;
GstGLWindowX11EGL *window_egl;
window_egl = GST_GL_WINDOW_X11_EGL (window_x11);
if (activate)
result = eglMakeCurrent (window_egl->egl_display, window_egl->egl_surface,
window_egl->egl_surface, window_egl->egl_context);
else
result = eglMakeCurrent (window_egl->egl_display, EGL_NO_SURFACE,
EGL_NO_SURFACE, EGL_NO_CONTEXT);
return result;
}
static guintptr
gst_gl_window_x11_egl_get_gl_context (GstGLWindowX11 * window_x11)
{
return (guintptr) GST_GL_WINDOW_X11_EGL (window_x11)->egl_context;
}
static void
gst_gl_window_x11_egl_swap_buffers (GstGLWindowX11 * window_x11)
{
GstGLWindowX11EGL *window_egl = GST_GL_WINDOW_X11_EGL (window_x11);
eglSwapBuffers (window_egl->egl_display, window_egl->egl_surface);
}
GstGLAPI
gst_gl_window_x11_egl_get_gl_api (GstGLWindow * window)
{
GstGLWindowX11EGL *window_egl = GST_GL_WINDOW_X11_EGL (window);
return window_egl->gl_api ? window_egl->
gl_api : GST_GL_API_GLES2 | GST_GL_API_OPENGL;
}
static gpointer
gst_gl_window_x11_egl_get_proc_address (GstGLWindow * window,
const gchar * name)
{
gpointer result;
if (!(result = eglGetProcAddress (name))) {
result = gst_gl_window_default_get_proc_address (window, name);
}
return result;
}
const gchar *
X11EGLErrorString ()
{
EGLint nErr = eglGetError ();
switch (nErr) {
case EGL_SUCCESS:
return "EGL_SUCCESS";
case EGL_BAD_DISPLAY:
return "EGL_BAD_DISPLAY";
case EGL_NOT_INITIALIZED:
return "EGL_NOT_INITIALIZED";
case EGL_BAD_ACCESS:
return "EGL_BAD_ACCESS";
case EGL_BAD_ALLOC:
return "EGL_BAD_ALLOC";
case EGL_BAD_ATTRIBUTE:
return "EGL_BAD_ATTRIBUTE";
case EGL_BAD_CONFIG:
return "EGL_BAD_CONFIG";
case EGL_BAD_CONTEXT:
return "EGL_BAD_CONTEXT";
case EGL_BAD_CURRENT_SURFACE:
return "EGL_BAD_CURRENT_SURFACE";
case EGL_BAD_MATCH:
return "EGL_BAD_MATCH";
case EGL_BAD_NATIVE_PIXMAP:
return "EGL_BAD_NATIVE_PIXMAP";
case EGL_BAD_NATIVE_WINDOW:
return "EGL_BAD_NATIVE_WINDOW";
case EGL_BAD_PARAMETER:
return "EGL_BAD_PARAMETER";
case EGL_BAD_SURFACE:
return "EGL_BAD_SURFACE";
default:
return "unknown";
}
}