gl: add GstGLContextGPUProcess backend

It builds its GL vtable from a proc address provided
by the application.

ext/gl/gstglimagesink.c

@@ -92,6 +92,7 @@
 
 #include "gstglimagesink.h"
 #include "gstglsinkbin.h"
+#include <gst/gl/gpuprocess/gstglcontext_gpu_process.h>
 
 #if GST_GL_HAVE_PLATFORM_EGL
 #include <gst/gl/egl/gsteglimagememory.h>
@@ -675,6 +676,19 @@ _ensure_gl_setup (GstGLImageSink * gl_sink)
   GST_DEBUG_OBJECT (gl_sink, "Ensuring setup");
 
   if (!gl_sink->context) {
+    if (GST_GL_IS_CONTEXT_GPU_PROCESS (gl_sink->other_context)) {
+      GstGLWindow *window = gst_gl_context_get_window (gl_sink->other_context);
+      gst_gl_window_set_draw_callback (window,
+          GST_GL_WINDOW_CB (gst_glimage_sink_on_draw),
+          gst_object_ref (gl_sink), (GDestroyNotify) gst_object_unref);
+      gst_object_unref (window);
+
+      gl_sink->context = gl_sink->other_context;
+      gl_sink->other_context = NULL;
+
+      return TRUE;
+    }
+
     GST_OBJECT_LOCK (gl_sink->display);
     do {
       GstGLContext *other_context;

gst-libs/gst/gl/Makefile.am

@@ -2,7 +2,7 @@
 lib_LTLIBRARIES = libgstgl-@GST_API_VERSION@.la
 
 SUBDIRS = glprototypes
-DIST_SUBDIRS = glprototypes android x11 win32 cocoa wayland dispmanx egl eagl
+DIST_SUBDIRS = glprototypes android x11 win32 cocoa wayland dispmanx egl eagl gpuprocess
 
 noinst_HEADERS =
 
@@ -99,6 +99,9 @@ SUBDIRS += egl
 libgstgl_@GST_API_VERSION@_la_LIBADD += egl/libgstgl-egl.la
 endif
 
+SUBDIRS += gpuprocess
+libgstgl_@GST_API_VERSION@_la_LIBADD += gpuprocess/libgstgl-gpuprocess.la
+
 configexecincludedir = $(libdir)/gstreamer-@GST_API_VERSION@/include/gst/gl
 nodist_configexecinclude_HEADERS = $(built_sys_header_configure)
 

gst-libs/gst/gl/gpuprocess/Makefile.am

@@ -0,0 +1,27 @@
+## Process this file with automake to produce Makefile.in
+
+noinst_LTLIBRARIES = libgstgl-gpuprocess.la
+
+libgstgl_gpuprocess_la_SOURCES = \
+	gstglcontext_gpu_process.c \
+	gstglwindow_gpu_process.c
+
+noinst_HEADERS = gstglwindow_gpu_process.h
+
+libgstgl_gpuprocessincludedir = $(includedir)/gstreamer-@GST_API_VERSION@/gst/gl/gpuprocess
+libgstgl_gpuprocessinclude_HEADERS = \
+	gstglcontext_gpu_process.h \
+	gstglwindow_gpu_process.h
+
+libgstgl_gpuprocess_la_CFLAGS = \
+	-I$(top_srcdir)/gst-libs \
+	-I$(top_builddir)/gst-libs \
+	$(GL_CFLAGS) \
+	$(GST_PLUGINS_BASE_CFLAGS) \
+	$(GST_BASE_CFLAGS) \
+	$(GST_CFLAGS)
+
+libgstgl_gpuprocess_la_LDFLAGS = \
+	$(GST_LIB_LDFLAGS) \
+	$(GST_ALL_LDFLAGS)
+

gst-libs/gst/gl/gpuprocess/gstglcontext_gpu_process.c

@@ -0,0 +1,130 @@
+/*
+ * GStreamer
+ * Copyright (C) 2015 Julien Isorce <j.isorce@samsung.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 "gstglcontext_gpu_process.h"
+#include "gstglwindow_gpu_process.h"
+
+#define GST_GL_CONTEXT_GPU_PROCESS_GET_PRIVATE(o)  \
+  (G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_CONTEXT_GPU_PROCESS, GstGLContextGPUProcessPrivate))
+
+#define GST_CAT_DEFAULT gst_gl_context_debug
+
+G_DEFINE_TYPE (GstGLContextGPUProcess, gst_gl_context_gpu_process,
+    GST_GL_TYPE_CONTEXT);
+
+struct _GstGLContextGPUProcessPrivate
+{
+  GstGLAPI gl_api;
+};
+
+static guintptr
+gst_gl_context_gpu_process_get_gl_context (GstGLContext * context)
+{
+  return 0;
+}
+
+static GstGLAPI
+gst_gl_context_gpu_process_get_gl_api (GstGLContext * context)
+{
+  return GST_GL_CONTEXT_GPU_PROCESS (context)->priv->gl_api;
+}
+
+static GstGLPlatform
+gst_gl_context_gpu_process_get_gl_platform (GstGLContext * context)
+{
+  return GST_GL_PLATFORM_GPU_PROCESS;
+}
+
+static gboolean
+gst_gl_context_gpu_process_activate (GstGLContext * context, gboolean activate)
+{
+  return TRUE;
+}
+
+static void
+gst_gl_context_gpu_process_class_init (GstGLContextGPUProcessClass * klass)
+{
+  GstGLContextClass *context_class = (GstGLContextClass *) klass;
+
+  g_type_class_add_private (klass, sizeof (GstGLContextGPUProcessPrivate));
+
+  context_class->get_gl_context =
+      GST_DEBUG_FUNCPTR (gst_gl_context_gpu_process_get_gl_context);
+  context_class->get_gl_api =
+      GST_DEBUG_FUNCPTR (gst_gl_context_gpu_process_get_gl_api);
+  context_class->get_gl_platform =
+      GST_DEBUG_FUNCPTR (gst_gl_context_gpu_process_get_gl_platform);
+  context_class->activate =
+      GST_DEBUG_FUNCPTR (gst_gl_context_gpu_process_activate);
+}
+
+static void
+gst_gl_context_gpu_process_init (GstGLContextGPUProcess * context)
+{
+  context->priv = GST_GL_CONTEXT_GPU_PROCESS_GET_PRIVATE (context);
+}
+
+GstGLContext *
+gst_gl_context_gpu_process_new (GstGLDisplay * display,
+    GstGLAPI gl_api, GstGLProcAddrFunc proc_addr)
+{
+  GstGLContext *context = NULL;
+  GstGLContextGPUProcess *gpu_context = NULL;
+  GstGLContextClass *context_class = NULL;
+  GstGLWindow *window = NULL;
+  GError *error = NULL;
+  g_return_val_if_fail ((gst_gl_display_get_gl_api (display) & gl_api) !=
+      GST_GL_API_NONE, NULL);
+
+  gpu_context = g_object_new (GST_GL_TYPE_CONTEXT_GPU_PROCESS, NULL);
+  gpu_context->priv->gl_api = gl_api;
+
+  context = GST_GL_CONTEXT (gpu_context);
+
+  gst_gl_context_set_display (context, display);
+  gst_gl_display_add_context (display, context);
+
+  context_class = GST_GL_CONTEXT_GET_CLASS (context);
+
+  context_class->get_current_context = NULL;
+  context_class->get_proc_address = GST_DEBUG_FUNCPTR (proc_addr);
+
+  gst_gl_context_activate (context, TRUE);
+  gst_gl_context_fill_info (context, &error);
+
+  if (error) {
+    GST_ERROR_OBJECT (context, "Failed to create gpu process context: %s",
+        error->message);
+    g_error_free (error);
+    gst_object_unref (context);
+    return NULL;
+  }
+
+  window = GST_GL_WINDOW (gst_gl_window_gpu_process_new (display));
+  gst_gl_context_set_window (context, window);
+  GST_GL_WINDOW_GET_CLASS (window)->open (context->window, NULL);
+  gst_object_unref (window);
+
+  return context;
+}

gst-libs/gst/gl/gpuprocess/gstglcontext_gpu_process.h

@@ -0,0 +1,70 @@
+/*
+ * GStreamer
+ * Copyright (C) 2015 Julien Isorce <j.isorce@samsung.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.
+ */
+
+#ifndef __GST_GL_CONTEXT_GPU_PROCESS_H__
+#define __GST_GL_CONTEXT_GPU_PROCESS_H__
+
+#include <gst/gl/gl.h>
+
+G_BEGIN_DECLS
+
+#define GST_GL_TYPE_CONTEXT_GPU_PROCESS (gst_gl_context_gpu_process_get_type())
+#define GST_GL_CONTEXT_GPU_PROCESS(o)           (G_TYPE_CHECK_INSTANCE_CAST((o), GST_GL_TYPE_CONTEXT_GPU_PROCESS, GstGLContextGPUProcess))
+#define GST_GL_CONTEXT_GPU_PROCESS_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), GST_GL_TYPE_CONTEXT_GPU_PROCESS, GstGLContextGPUProcessClass))
+#define GST_GL_IS_CONTEXT_GPU_PROCESS(o)        (G_TYPE_CHECK_INSTANCE_TYPE((o), GST_GL_TYPE_CONTEXT_GPU_PROCESS))
+#define GST_GL_IS_CONTEXT_GPU_PROCESS_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE((k), GST_GL_TYPE_CONTEXT_GPU_PROCESS))
+#define GST_GL_CONTEXT_GPU_PROCESS_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS((o), GST_GL_TYPE_CONTEXT_GPU_PROCESS, GstGLContextGPUProcessClass))
+
+typedef struct _GstGLContextGPUProcess GstGLContextGPUProcess;
+typedef struct _GstGLContextGPUProcessPrivate GstGLContextGPUProcessPrivate;
+typedef struct _GstGLContextGPUProcessClass GstGLContextGPUProcessClass;
+
+typedef gpointer (* GstGLProcAddrFunc) (GstGLContext *context, const gchar *name);
+
+/**
+ * GstGLContextGPUProcess:
+ *
+ * Opaque #GstGLContextGPUProcess object
+ */
+struct _GstGLContextGPUProcess {
+  GstGLContext parent;
+
+  /*< private >*/
+  GstGLContextGPUProcessPrivate *priv;
+
+  /*< private >*/
+  gpointer _reserved[GST_PADDING];
+};
+
+struct _GstGLContextGPUProcessClass {
+  GstGLContextClass parent;
+
+  /*< private >*/
+  gpointer _reserved[GST_PADDING];
+};
+
+GType gst_gl_context_gpu_process_get_type (void);
+
+GstGLContext * gst_gl_context_gpu_process_new (GstGLDisplay * display,
+    GstGLAPI gl_api, GstGLProcAddrFunc proc_addr);
+
+G_END_DECLS
+
+#endif /* __GST_GL_CONTEXT_GPU_PROCESS_H__ */

gst-libs/gst/gl/gpuprocess/gstglwindow_gpu_process.c

@@ -0,0 +1,63 @@
+/*
+ * GStreamer
+ * Copyright (C) 2015 Julien Isorce <j.isorce@samsung.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_gpu_process.h"
+
+#define GST_GL_WINDOW_GPU_PROCESS_GET_PRIVATE(o)  \
+  (G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_WINDOW_GPU_PROCESS, GstGLWindowGPUProcessPrivate))
+
+#define GST_CAT_DEFAULT gst_gl_window_debug
+
+#define gst_gl_window_gpu_process_parent_class parent_class
+G_DEFINE_TYPE (GstGLWindowGPUProcess, gst_gl_window_gpu_process,
+    GST_GL_TYPE_WINDOW);
+
+struct _GstGLWindowGPUProcessPrivate
+{
+};
+
+static void
+gst_gl_window_gpu_process_class_init (GstGLWindowGPUProcessClass * klass)
+{
+  g_type_class_add_private (klass, sizeof (GstGLWindowGPUProcessPrivate));
+}
+
+static void
+gst_gl_window_gpu_process_init (GstGLWindowGPUProcess * window)
+{
+  window->priv = GST_GL_WINDOW_GPU_PROCESS_GET_PRIVATE (window);
+}
+
+GstGLWindowGPUProcess *
+gst_gl_window_gpu_process_new (GstGLDisplay * display)
+{
+  GstGLWindowGPUProcess *window =
+      g_object_new (GST_GL_TYPE_WINDOW_GPU_PROCESS, NULL);
+
+  GST_GL_WINDOW (window)->display = gst_object_ref (display);
+
+  return window;
+}

gst-libs/gst/gl/gpuprocess/gstglwindow_gpu_process.h

@@ -0,0 +1,74 @@
+/*
+ * GStreamer
+ * Copyright (C) 2015 Julien Isorce <j.isorce@samsung.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.
+ */
+
+#ifndef __GST_GL_WINDOW_GPU_PROCESS_H__
+#define __GST_GL_WINDOW_GPU_PROCESS_H__
+
+#include <gst/gl/gl.h>
+#include <gst/gl/gpuprocess/gstglcontext_gpu_process.h>
+
+G_BEGIN_DECLS
+
+#define GST_GL_TYPE_WINDOW_GPU_PROCESS         (gst_gl_window_gpu_process_get_type())
+#define GST_GL_WINDOW_GPU_PROCESS(o)           (G_TYPE_CHECK_INSTANCE_CAST((o), GST_GL_TYPE_WINDOW_GPU_PROCESS, GstGLWindowGPUProcess))
+#define GST_GL_WINDOW_GPU_PROCESS_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), GST_GL_TYPE_WINDOW_GPU_PROCESS, GstGLWindowGPUProcessClass))
+#define GST_GL_IS_WINDOW_GPU_PROCESS(o)        (G_TYPE_CHECK_INSTANCE_TYPE((o), GST_GL_TYPE_WINDOW_GPU_PROCESS))
+#define GST_GL_IS_WINDOW_GPU_PROCESS_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE((k), GST_GL_TYPE_WINDOW_GPU_PROCESS))
+#define GST_GL_WINDOW_GPU_PROCESS_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS((o), GST_GL_TYPE_WINDOW_GPU_PROCESS, GstGLWindowGPUProcessClass))
+
+typedef struct _GstGLWindowGPUProcess        GstGLWindowGPUProcess;
+typedef struct _GstGLWindowGPUProcessPrivate GstGLWindowGPUProcessPrivate;
+typedef struct _GstGLWindowGPUProcessClass   GstGLWindowGPUProcessClass;
+
+/**
+ * GstGLWindowGPUProcess:
+ *
+ * Opaque #GstGLWindowGPUProcess object
+ */
+struct _GstGLWindowGPUProcess
+{
+  GstGLWindow parent;
+
+  /*< private >*/
+  GstGLWindowGPUProcessPrivate *priv;
+
+  /*< private >*/
+  gpointer _reserved[GST_PADDING];
+};
+
+/**
+ * GstGLWindowGPUProcessClass:
+ *
+ * Opaque #GstGLWindowGPUProcessClass object
+ */
+struct _GstGLWindowGPUProcessClass {
+  GstGLWindowClass parent_class;
+
+  /*< private >*/
+  gpointer _reserved[GST_PADDING];
+};
+
+GType gst_gl_window_gpu_process_get_type (void);
+
+GstGLWindowGPUProcess * gst_gl_window_gpu_process_new (GstGLDisplay * display);
+
+G_END_DECLS
+
+#endif /* __GST_GL_WINDOW_GPU_PROCESS_H__ */

gst-libs/gst/gl/gstglapi.c

@@ -152,6 +152,9 @@ gst_gl_platform_to_string (GstGLPlatform platform)
   if (platform & GST_GL_PLATFORM_CGL) {
     str = g_string_append (str, "cgl ");
   }
+  if (platform & GST_GL_PLATFORM_GPU_PROCESS) {
+    str = g_string_append (str, "gpu_process ");
+  }
 
 out:
   if (!str)
@@ -193,6 +196,9 @@ gst_gl_platform_from_string (const gchar * platform_s)
       } else if (g_strstr_len (platform, 3, "cgl")) {
         ret |= GST_GL_PLATFORM_CGL;
         platform = &platform[3];
+      } else if (g_strstr_len (platform, 11, "gpu_process")) {
+        ret |= GST_GL_PLATFORM_GPU_PROCESS;
+        platform = &platform[11];
       } else {
         GST_ERROR ("Error parsing \'%s\'", platform);
         break;

gst-libs/gst/gl/gstglapi.h

@@ -116,6 +116,7 @@ typedef enum
   GST_GL_PLATFORM_WGL = (1 << 2),
   GST_GL_PLATFORM_CGL = (1 << 3),
   GST_GL_PLATFORM_EAGL = (1 << 4),
+  GST_GL_PLATFORM_GPU_PROCESS = (1 << 5),
 
   GST_GL_PLATFORM_ANY = G_MAXUINT32
 } GstGLPlatform;