gstreamer/ext/eglgles/gsteglglessink.c

/*
 * GStreamer EGL/GLES Sink
 * Copyright (C) 2012 Collabora Ltd.
 *   @author: Reynaldo H. Verdejo Pinochet <reynaldo@collabora.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Alternatively, the contents of this file may be used under the
 * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
 * which case the following provisions apply instead of the ones
 * mentioned above:
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/**
 * SECTION:element-eglglessink
 *
 * EglGlesSink renders video frames on a EGL surface it sets up
 * from a window it either creates (on X11) or gets a handle to
 * through it's xOverlay interface. All the display/surface logic
 * in this sink uses EGL to interact with the native window system.
 * The rendering logic, in turn, uses OpenGL ES v2.
 *
 * This sink has been tested to work on X11/Mesa and on Android
 * (From Gingerbread on to Jelly Bean) and while it's currently
 * using an slow copy-over rendering path it has proven to be fast
 * enough on the devices we have tried it on. That being said, there's
 * an currently unfinished and drafted fast rendering path in the code,
 * relying on a set of EGL/GLES extensions.
 *
 * <refsect2>
 * <title>Supported EGL/OpenGL ES versions</title>
 * <para>
 * This Sink uses EGLv1 and GLESv2
 * </para>
 * </refsect2>
 *
 * <refsect2>
 * <title>Example launch line</title>
 * |[
 * gst-launch -v -m videotestsrc ! eglglessink
 * ]|
 * </refsect2>
 *
 * <refsect2>
 * <title>Example launch line with forced slow path rendering</title>
 * <para>
 * By setting the force_rendering_slow property you can force the sink
 * to chose the buffer-copy slow rendering path even if the needed
 * EGL/GLES extensions for the fast rendering path are available.
 * </para>
 * |[
 * gst-launch -v -m videotestsrc ! eglglessink force_rendering_slow=TRUE
 * ]|
 * </refsect2>
 *
 * <refsect2>
 * <title>Example launch line with internal window creation disabled</title>
 * <para>
 * By setting the can_create_window property to FALSE you can force the
 * sink to wait for a window handle through it's xOverlay interface even
 * if internal window creation is supported by the platform. Window creation
 * is only supported in X11 right now but it should be trivial to add support
 * for different platforms.
 * </para>
 * |[
 * gst-launch -v -m videotestsrc ! eglglessink can_create_window=FALSE
 * ]|
 * </refsect2>
 *
 * <refsect2>
 * <title>Scaling</title>
 * <para>
 * The sink will try it's best to consider the incoming frame's and display's
 * pixel aspect ratio and fill the corresponding surface without altering the
 * decoded frame's geometry when scaling. You can disable this logic by setting
 * the force_aspect_ratio property to FALSE, in which case the sink will just
 * fill the entire surface it has access to regardles of the PAR/DAR relationship.
 * </para>
 * <para>
 * Querying the display aspect ratio is only supported with EGL versions >= 1.2.
 * The sink will just assume the DAR to be 1/1 if it can't get access to this
 * information.
 * </para>
 * <para>
 * Here is an example launch line with the PAR/DAR aware scaling disabled:
 * </para>
 * |[
 * gst-launch -v -m videotestsrc ! eglglessink force_aspect_ratio=FALSE
 * ]|
 * </refsect2>
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <string.h>
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/gstvideosink.h>
#include <gst/interfaces/xoverlay.h>

#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>

#include <pthread.h>

#include "video_platform_wrapper.h"

#include "gsteglglessink.h"

/* Some EGL implementations are reporting wrong
 * values for the display's EGL_PIXEL_ASPECT_RATIO.
 * They are required by the khronos specs to report
 * this value as w/h * EGL_DISPLAY_SCALING (Which is
 * a constant with value 10000) but at least the
 * Galaxy SIII (Android) is reporting just 1 when
 * w = h. We use these two to bound returned values to
 * sanity.
 */
#define EGL_SANE_DAR_MIN ((EGL_DISPLAY_SCALING)/10)
#define EGL_SANE_DAR_MAX ((EGL_DISPLAY_SCALING)*10)

GST_DEBUG_CATEGORY_STATIC (gst_eglglessink_debug);
#define GST_CAT_DEFAULT gst_eglglessink_debug

/* These are only needed for the fast rendering path */
#ifdef EGL_KHR_image
static PFNEGLCREATEIMAGEKHRPROC my_eglCreateImageKHR;
static PFNEGLDESTROYIMAGEKHRPROC my_eglDestroyImageKHR;

#ifdef EGL_KHR_lock_surface
static PFNEGLLOCKSURFACEKHRPROC my_eglLockSurfaceKHR;
static PFNEGLUNLOCKSURFACEKHRPROC my_eglUnlockSurfaceKHR;

static EGLint lock_attribs[] = {
  EGL_MAP_PRESERVE_PIXELS_KHR, EGL_TRUE,
  EGL_LOCK_USAGE_HINT_KHR, EGL_READ_SURFACE_BIT_KHR | EGL_WRITE_SURFACE_BIT_KHR,
  EGL_NONE
};

#ifdef GL_OES_EGL_image
static PFNGLEGLIMAGETARGETTEXTURE2DOESPROC my_glEGLImageTargetTexture2DOES;
#define EGL_FAST_RENDERING_POSSIBLE 1
#endif
#endif
#endif

/* GLESv2 GLSL Shaders
 *
 * OpenGL ES Standard does not mandate YUV support. This is
 * why most of these shaders deal with Packed/Planar YUV->RGB
 * conversion.
 */

/* *INDENT-OFF* */
/* Direct vertex copy */
static const char *vert_COPY_prog = {
      "attribute vec3 position;"
      "attribute vec2 texpos;"
      "varying vec2 opos;"
      "void main(void)"
      "{"
      " opos = texpos;"
      " gl_Position = vec4(position, 1.0);"
      "}"
};

/* Direct fragments copy */
static const char *frag_COPY_prog = {
  "precision mediump float;"
      "varying vec2 opos;"
      "uniform sampler2D tex;"
      "void main(void)"
      "{"
      " vec4 t = texture2D(tex, opos);"
      " gl_FragColor = vec4(t.rgb, 1.0);"
      "}"
};

/* Channel reordering for XYZ <-> ZYX conversion */
static const char *frag_REORDER_prog = {
  "precision mediump float;"
      "varying vec2 opos;"
      "uniform sampler2D tex;"
      "void main(void)"
      "{"
      " vec4 t = texture2D(tex, opos);"
      " gl_FragColor = vec4(t.%c, t.%c, t.%c, 1.0);"
      "}"
};

/* Packed YUV converters */

/** AYUV to RGB conversion */
static const char *frag_AYUV_prog = {
      "precision mediump float;"
      "varying vec2 opos;"
      "uniform sampler2D tex;"
      "const vec3 offset = vec3(-0.0625, -0.5, -0.5);"
      "const vec3 rcoeff = vec3(1.164, 0.000, 1.596);"
      "const vec3 gcoeff = vec3(1.164,-0.391,-0.813);"
      "const vec3 bcoeff = vec3(1.164, 2.018, 0.000);"
      "void main(void) {"
      "  float r,g,b;"
      "  vec3 yuv;"
      "  yuv  = texture2D(tex,opos).gba;"
      "  yuv += offset;"
      "  r = dot(yuv, rcoeff);"
      "  g = dot(yuv, gcoeff);"
      "  b = dot(yuv, bcoeff);"
      "  gl_FragColor=vec4(r,g,b,1.0);"
      "}"
};

/** YUY2/YVYU/UYVY to RGB conversion */
static const char *frag_YUY2_YVYU_UYVY_prog = {
      "precision mediump float;"
      "varying vec2 opos;"
      "uniform sampler2D Ytex, UVtex;"
      "const vec3 offset = vec3(-0.0625, -0.5, -0.5);"
      "const vec3 rcoeff = vec3(1.164, 0.000, 1.596);"
      "const vec3 gcoeff = vec3(1.164,-0.391,-0.813);"
      "const vec3 bcoeff = vec3(1.164, 2.018, 0.000);"
      "void main(void) {"
      "  float r, g, b;"
      "  vec3 yuv;"
      "  yuv.x = texture2D(Ytex,opos).%c;"
      "  yuv.yz = texture2D(UVtex,opos).%c%c;"
      "  yuv += offset;"
      "  r = dot(yuv, rcoeff);"
      "  g = dot(yuv, gcoeff);"
      "  b = dot(yuv, bcoeff);"
      "  gl_FragColor=vec4(r,g,b,1.0);"
      "}"
};

/* Planar YUV converters */

/** YUV to RGB conversion */
static const char *frag_PLANAR_YUV_prog = {
      "precision mediump float;"
      "varying vec2 opos;"
      "uniform sampler2D Ytex,Utex,Vtex;"
      "const vec3 offset = vec3(-0.0625, -0.5, -0.5);"
      "const vec3 rcoeff = vec3(1.164, 0.000, 1.596);"
      "const vec3 gcoeff = vec3(1.164,-0.391,-0.813);"
      "const vec3 bcoeff = vec3(1.164, 2.018, 0.000);"
      "void main(void) {"
      "  float r,g,b;"
      "  vec3 yuv;"
      "  yuv.x=texture2D(Ytex,opos).r;"
      "  yuv.y=texture2D(Utex,opos).r;"
      "  yuv.z=texture2D(Vtex,opos).r;"
      "  yuv += offset;"
      "  r = dot(yuv, rcoeff);"
      "  g = dot(yuv, gcoeff);"
      "  b = dot(yuv, bcoeff);"
      "  gl_FragColor=vec4(r,g,b,1.0);"
      "}"
};

/** NV12/NV21 to RGB conversion */
static const char *frag_NV12_NV21_prog = {
      "precision mediump float;"
      "varying vec2 opos;"
      "uniform sampler2D Ytex,UVtex;"
      "const vec3 offset = vec3(-0.0625, -0.5, -0.5);"
      "const vec3 rcoeff = vec3(1.164, 0.000, 1.596);"
      "const vec3 gcoeff = vec3(1.164,-0.391,-0.813);"
      "const vec3 bcoeff = vec3(1.164, 2.018, 0.000);"
      "void main(void) {"
      "  float r,g,b;"
      "  vec3 yuv;"
      "  yuv.x=texture2D(Ytex,opos).r;"
      "  yuv.yz=texture2D(UVtex,opos).%c%c;"
      "  yuv += offset;"
      "  r = dot(yuv, rcoeff);"
      "  g = dot(yuv, gcoeff);"
      "  b = dot(yuv, bcoeff);"
      "  gl_FragColor=vec4(r,g,b,1.0);"
      "}"
};
/* *INDENT-ON* */

/* Input capabilities. */
static GstStaticPadTemplate gst_eglglessink_sink_template_factory =
    GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA ";"
        GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_ABGR ";"
        GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx ";"
        GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
        GST_VIDEO_CAPS_YUV
        ("{ AYUV, Y444, I420, YV12, NV12, NV21, YUY2, YVYU, UYVY, Y42B, Y41B }") ";"
        GST_VIDEO_CAPS_RGB ";" GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_RGB_16));

/* Filter signals and args */
enum
{
  /* FILL ME */
  LAST_SIGNAL
};

enum
{
  PROP_0,
  PROP_CREATE_WINDOW,
  PROP_FORCE_ASPECT_RATIO,
  PROP_FORCE_RENDERING_SLOW
};

/* will probably move elsewhere */
static const EGLint eglglessink_RGBA8888_attribs[] = {
  EGL_RED_SIZE, 8,
  EGL_GREEN_SIZE, 8,
  EGL_BLUE_SIZE, 8,
  EGL_ALPHA_SIZE, 8,
  EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
  EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
  EGL_NONE
};

static const EGLint eglglessink_RGB888_attribs[] = {
  EGL_RED_SIZE, 8,
  EGL_GREEN_SIZE, 8,
  EGL_BLUE_SIZE, 8,
  EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
  EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
  EGL_NONE
};

static const EGLint eglglessink_RGB565_attribs[] = {
  EGL_RED_SIZE, 5,
  EGL_GREEN_SIZE, 6,
  EGL_BLUE_SIZE, 5,
  EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
  EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
  EGL_NONE
};

static void gst_eglglessink_finalize (GObject * object);
static void gst_eglglessink_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec);
static void gst_eglglessink_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_eglglessink_change_state (GstElement * element,
    GstStateChange transition);
static GstFlowReturn gst_eglglessink_show_frame (GstVideoSink * vsink,
    GstBuffer * buf);
static gboolean gst_eglglessink_setcaps (GstBaseSink * bsink, GstCaps * caps);
static GstFlowReturn gst_eglglessink_buffer_alloc (GstBaseSink * sink,
    guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
static GstCaps *gst_eglglessink_getcaps (GstBaseSink * bsink);

/* XOverlay interface cruft */
static gboolean gst_eglglessink_interface_supported
    (GstImplementsInterface * iface, GType type);
static void gst_eglglessink_implements_init
    (GstImplementsInterfaceClass * klass);
static void gst_eglglessink_xoverlay_init (GstXOverlayClass * iface);
static void gst_eglglessink_init_interfaces (GType type);

/* Actual XOverlay interface funcs */
static void gst_eglglessink_expose (GstXOverlay * overlay);
static void gst_eglglessink_set_window_handle (GstXOverlay * overlay,
    guintptr id);
static void gst_eglglessink_set_render_rectangle (GstXOverlay * overlay, gint x,
    gint y, gint width, gint height);

/* Custom Buffer funcs */
static void gst_eglglesbuffer_destroy (GstEglGlesBuffer * eglglessink);
static void gst_eglglesbuffer_init (GstEglGlesBuffer * eglglessink,
    gpointer g_class);
static GType gst_eglglesbuffer_get_type (void);
static GstEglGlesImageFmt *gst_eglglessink_get_compat_format_from_caps
    (GstEglGlesSink * eglglessink, GstCaps * caps);
static void gst_eglglesbuffer_finalize (GstEglGlesBuffer * eglglessink);
static void gst_eglglesbuffer_class_init (gpointer g_class,
    gpointer class_data);
static void gst_eglglesbuffer_free (GstEglGlesBuffer * eglglesbuffer);
static GstEglGlesBuffer *gst_eglglesbuffer_new (GstEglGlesSink * eglglessink,
    GstCaps * caps);
static EGLint *gst_eglglesbuffer_create_native (EGLNativeWindowType win,
    EGLConfig config, EGLNativeDisplayType display, const EGLint * egl_attribs);

/* Utility */
static EGLNativeWindowType gst_eglglessink_create_window (GstEglGlesSink *
    eglglessink, gint width, gint height);
static inline gint
gst_eglglessink_fill_supported_fbuffer_configs (GstEglGlesSink * eglglessink);
static gboolean gst_eglglessink_init_egl_display (GstEglGlesSink * eglglessink);
static gboolean gst_eglglessink_choose_config (GstEglGlesSink * eglglessink);
static gboolean gst_eglglessink_init_egl_surface (GstEglGlesSink * eglglessink);
static void gst_eglglessink_init_egl_exts (GstEglGlesSink * eglglessink);
static gboolean gst_eglglessink_setup_vbo (GstEglGlesSink * eglglessink,
    gboolean reset);
static GstFlowReturn gst_eglglessink_render_and_display (GstEglGlesSink * sink,
    GstBuffer * buf);
static inline gboolean got_gl_error (const char *wtf);
static inline void show_egl_error (const char *wtf);
static void gst_eglglessink_wipe_fmt (gpointer data);
static inline gboolean egl_init (GstEglGlesSink * eglglessink);
static gboolean gst_eglglessink_context_make_current (GstEglGlesSink *
    eglglessink, gboolean bind, gboolean streaming_thread);

static GstBufferClass *gsteglglessink_buffer_parent_class = NULL;
#define GST_TYPE_EGLGLESBUFFER (gst_eglglesbuffer_get_type())
#define GST_IS_EGLGLESBUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_EGLGLESBUFFER))
#define GST_EGLGLESBUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_EGLGLESBUFFER, GstEglGlesBuffer))
#define GST_EGLGLESBUFFER_CAST(obj) ((GstEglGlesBuffer *)(obj))


GST_BOILERPLATE_FULL (GstEglGlesSink, gst_eglglessink, GstVideoSink,
    GST_TYPE_VIDEO_SINK, gst_eglglessink_init_interfaces);

/* Custom Buffer Funcs */
/* XXX: Drafted implementation */
static EGLint *
gst_eglglesbuffer_create_native (EGLNativeWindowType win,
    EGLConfig config, EGLNativeDisplayType display, const EGLint * egl_attribs)
{
  EGLNativePixmapType pix = 0;
  EGLSurface pix_surface;
  EGLint *buffer = NULL;

  /* XXX: Need to figure out how to create an egl_native_pixmap_t to
   * feed to eglCreatePixmapSurface. An option on android: create an
   * android_native_buffer_t to pass straight to eglCreateImageKHR.
   */

  pix_surface = eglCreatePixmapSurface (display, config, pix, egl_attribs);

  if (pix_surface == EGL_NO_SURFACE) {
    show_egl_error ("eglCreatePixmapSurface");
    GST_CAT_ERROR (GST_CAT_DEFAULT, "Unable to create pixmap surface");
    goto EGL_ERROR;
  }

  if (my_eglLockSurfaceKHR (display, pix_surface, lock_attribs) == EGL_FALSE) {
    show_egl_error ("eglLockSurfaceKHR");
    GST_CAT_ERROR (GST_CAT_DEFAULT, "Unable to lock surface");
    goto EGL_ERROR;
  }

  if (eglQuerySurface (display, pix_surface, EGL_BITMAP_POINTER_KHR, buffer)
      == EGL_FALSE) {
    show_egl_error ("eglQuerySurface");
    GST_CAT_ERROR (GST_CAT_DEFAULT,
        "Unable to query surface for bitmap pointer");
    goto EGL_ERROR_LOCKED;
  }

  return buffer;

EGL_ERROR_LOCKED:
  my_eglUnlockSurfaceKHR (display, pix_surface);
EGL_ERROR:
  GST_CAT_ERROR (GST_CAT_DEFAULT, "EGL call returned error %x", eglGetError ());
  if (!eglDestroySurface (display, pix_surface)) {
    show_egl_error ("eglDestroySurface");
    GST_CAT_ERROR (GST_CAT_DEFAULT, "Couldn't destroy surface");
  }
  return NULL;
}

static GstEglGlesBuffer *
gst_eglglesbuffer_new (GstEglGlesSink * eglglessink, GstCaps * caps)
{
  GstEglGlesBuffer *eglglesbuffer = NULL;
  GstStructure *structure = NULL;
  GstEglGlesImageFmt *format;

  g_return_val_if_fail (GST_IS_EGLGLESSINK (eglglessink), NULL);
  g_return_val_if_fail (caps, NULL);

  eglglesbuffer =
      (GstEglGlesBuffer *) gst_mini_object_new (GST_TYPE_EGLGLESBUFFER);
  GST_DEBUG_OBJECT (eglglesbuffer, "Creating new GstEglGlesBuffer");

  structure = gst_caps_get_structure (caps, 0);

  if (!gst_structure_get_int (structure, "width", &eglglesbuffer->width) ||
      !gst_structure_get_int (structure, "height", &eglglesbuffer->height)) {
    GST_WARNING ("Failed getting geometry from caps %" GST_PTR_FORMAT, caps);
  }

  GST_LOG_OBJECT (eglglessink, "creating %dx%d", eglglesbuffer->width,
      eglglesbuffer->height);

  format = gst_eglglessink_get_compat_format_from_caps (eglglessink, caps);

  if (!format) {
    GST_WARNING_OBJECT (eglglessink,
        "Failed to get format from caps %" GST_PTR_FORMAT, caps);
    GST_ERROR_OBJECT (eglglessink,
        "Invalid input caps. Failed to create  %dx%d buffer",
        eglglesbuffer->width, eglglesbuffer->height);
    goto BEACH_UNLOCKED;
  }

  eglglesbuffer->format = format->fmt;
  eglglesbuffer->eglglessink = gst_object_ref (eglglessink);

  eglglesbuffer->image = gst_eglglesbuffer_create_native
      (eglglessink->eglglesctx.used_window, eglglessink->eglglesctx.config,
      eglglessink->eglglesctx.display, NULL);
  if (!eglglesbuffer->image) {
    GST_ERROR_OBJECT (eglglessink,
        "Failed to create native %dx%d image buffer", eglglesbuffer->width,
        eglglesbuffer->height);
    goto BEACH_UNLOCKED;
  }

  GST_BUFFER_DATA (eglglesbuffer) = (guchar *) eglglesbuffer->image;
  GST_BUFFER_SIZE (eglglesbuffer) = eglglesbuffer->size;

  return eglglesbuffer;

BEACH_UNLOCKED:
  gst_eglglesbuffer_free (eglglesbuffer);
  eglglesbuffer = NULL;
  return NULL;
}

static void
gst_eglglesbuffer_destroy (GstEglGlesBuffer * eglglesbuffer)
{

  GstEglGlesSink *eglglessink;

  GST_DEBUG_OBJECT (eglglesbuffer, "Destroying buffer");

  eglglessink = eglglesbuffer->eglglessink;
  if (G_UNLIKELY (eglglessink == NULL))
    goto NO_SINK;

  g_return_if_fail (GST_IS_EGLGLESSINK (eglglessink));

  GST_OBJECT_LOCK (eglglessink);
  GST_DEBUG_OBJECT (eglglessink, "Destroying image");

  if (eglglesbuffer->image) {
    if (GST_BUFFER_DATA (eglglesbuffer)) {
      g_free (GST_BUFFER_DATA (eglglesbuffer));
    }
    eglglesbuffer->image = NULL;
    /* XXX: Unallocate EGL/GL especific resources asociated with this
     * Image here
     */
  }

  GST_OBJECT_UNLOCK (eglglessink);
  eglglesbuffer->eglglessink = NULL;
  gst_object_unref (eglglessink);

  GST_MINI_OBJECT_CLASS (gsteglglessink_buffer_parent_class)->finalize
      (GST_MINI_OBJECT (eglglesbuffer));

  return;

NO_SINK:
  GST_WARNING ("No sink found");
  return;
}

/* XXX: Missing implementation.
 * This function will have the code for maintaing the pool. readding or
 * destroying the buffers on size or runing/status change. Right now all
 * it does is to call _destroy.
 * for a proper implementation take a look at xvimagesink's image buffer
 * destroy func.
 */
static void
gst_eglglesbuffer_finalize (GstEglGlesBuffer * eglglesbuffer)
{
  GstEglGlesSink *eglglessink;

  eglglessink = eglglesbuffer->eglglessink;
  if (G_UNLIKELY (eglglessink == NULL))
    goto NO_SINK;

  g_return_if_fail (GST_IS_EGLGLESSINK (eglglessink));

  gst_eglglesbuffer_destroy (eglglesbuffer);

  return;

NO_SINK:
  GST_WARNING ("No sink found");
  return;
}

static void
gst_eglglesbuffer_free (GstEglGlesBuffer * eglglesbuffer)
{
  /* Make sure it is not recycled. This is meaningless without
   * a pool but was left here as a reference
   */
  eglglesbuffer->width = -1;
  eglglesbuffer->height = -1;
  gst_buffer_unref (GST_BUFFER (eglglesbuffer));
}

static void
gst_eglglesbuffer_init (GstEglGlesBuffer * eglglesbuffer, gpointer g_class)
{
  eglglesbuffer->width = 0;
  eglglesbuffer->height = 0;
  eglglesbuffer->size = 0;
  eglglesbuffer->image = NULL;
  eglglesbuffer->format = GST_EGLGLESSINK_IMAGE_NOFMT;
}

static void
gst_eglglesbuffer_class_init (gpointer g_class, gpointer class_data)
{
  GstMiniObjectClass *mini_object_class = GST_MINI_OBJECT_CLASS (g_class);

  gsteglglessink_buffer_parent_class = g_type_class_peek_parent (g_class);

  mini_object_class->finalize = (GstMiniObjectFinalizeFunction)
      gst_eglglesbuffer_finalize;
}

static GType
gst_eglglesbuffer_get_type (void)
{
  static GType _gst_eglglessink_buffer_type;

  if (G_UNLIKELY (_gst_eglglessink_buffer_type == 0)) {
    static const GTypeInfo eglglessink_buffer_info = {
      sizeof (GstBufferClass),
      NULL,
      NULL,
      gst_eglglesbuffer_class_init,
      NULL,
      NULL,
      sizeof (GstEglGlesBuffer),
      0,
      (GInstanceInitFunc) gst_eglglesbuffer_init,
      NULL
    };
    _gst_eglglessink_buffer_type = g_type_register_static (GST_TYPE_BUFFER,
        "GstEglGlesBuffer", &eglglessink_buffer_info, 0);
  }
  return _gst_eglglessink_buffer_type;
}

static GstEglGlesImageFmt *
gst_eglglessink_get_compat_format_from_caps (GstEglGlesSink * eglglessink,
    GstCaps * caps)
{

  GList *list;
  GstEglGlesImageFmt *format;

  g_return_val_if_fail (GST_IS_EGLGLESSINK (eglglessink), 0);

  list = eglglessink->supported_fmts;

  /* Traverse the list trying to find a compatible format */
  while (list) {
    format = list->data;
    GST_DEBUG_OBJECT (eglglessink, "Checking compatibility between listed %"
        GST_PTR_FORMAT " and %" GST_PTR_FORMAT, format->caps, caps);
    if (format) {
      if (gst_caps_can_intersect (caps, format->caps)) {
        GST_INFO_OBJECT (eglglessink, "Found compatible format %d",
            format->fmt);
        GST_DEBUG_OBJECT (eglglessink,
            "Got caps %" GST_PTR_FORMAT " and this format can do %"
            GST_PTR_FORMAT, caps, format->caps);
        return format;
      }
    }
    list = g_list_next (list);
  }

  return NULL;
}

static GstCaps *
gst_eglglessink_different_size_suggestion (GstEglGlesSink * eglglessink,
    GstCaps * caps)
{
  GstCaps *intersection;
  GstCaps *new_caps;
  GstStructure *s;
  gint width, height;
  gint par_n = 1, par_d = 1;
  gint dar_n, dar_d;
  gint w, h;

  new_caps = gst_caps_copy (caps);

  s = gst_caps_get_structure (new_caps, 0);

  gst_structure_get_int (s, "width", &width);
  gst_structure_get_int (s, "height", &height);
  gst_structure_get_fraction (s, "pixel-aspect-ratio", &par_n, &par_d);

  gst_structure_remove_field (s, "width");
  gst_structure_remove_field (s, "height");
  gst_structure_remove_field (s, "pixel-aspect-ratio");

  intersection = gst_caps_intersect (eglglessink->current_caps, new_caps);
  gst_caps_unref (new_caps);

  if (gst_caps_is_empty (intersection))
    return intersection;

  s = gst_caps_get_structure (intersection, 0);

  gst_util_fraction_multiply (width, height, par_n, par_d, &dar_n, &dar_d);

  gst_structure_fixate_field_nearest_int (s, "width", width);
  gst_structure_fixate_field_nearest_int (s, "height", height);
  gst_structure_get_int (s, "width", &w);
  gst_structure_get_int (s, "height", &h);

  gst_util_fraction_multiply (h, w, dar_n, dar_d, &par_n, &par_d);
  gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d,
      NULL);

  return intersection;
}

static GstFlowReturn
gst_eglglessink_buffer_alloc (GstBaseSink * bsink, guint64 offset,
    guint size, GstCaps * caps, GstBuffer ** buf)
{

  GstEglGlesSink *eglglessink;
  GstFlowReturn ret = GST_FLOW_OK;
  GstEglGlesBuffer *eglglesbuffer = NULL;
  GstCaps *intersection = NULL;
  GstStructure *structure = NULL;
  gint width, height;
  GstEglGlesImageFmt *format;

  eglglessink = GST_EGLGLESSINK (bsink);

  /* No custom alloc for the slow rendering path */
  if (eglglessink->rendering_path == GST_EGLGLESSINK_RENDER_SLOW) {
    GST_INFO_OBJECT (eglglessink, "No custom alloc for slow rendering path");
    *buf = NULL;
    return GST_FLOW_OK;
  }

  if (G_UNLIKELY (!caps))
    goto NO_CAPS;

  if (G_LIKELY (gst_caps_is_equal (caps, eglglessink->current_caps))) {
    GST_LOG_OBJECT (eglglessink,
        "Buffer alloc for same last_caps, reusing caps");
    intersection = gst_caps_ref (caps);
    width = GST_VIDEO_SINK_WIDTH (eglglessink);
    height = GST_VIDEO_SINK_HEIGHT (eglglessink);

    goto REUSE_LAST_CAPS;
  }

  GST_DEBUG_OBJECT (eglglessink, "Buffer alloc requested size %d with caps %"
      GST_PTR_FORMAT ", intersecting with our caps %" GST_PTR_FORMAT, size,
      caps, eglglessink->current_caps);

  /* Check the caps against our current caps */
  intersection = gst_caps_intersect (eglglessink->current_caps, caps);

  GST_DEBUG_OBJECT (eglglessink, "Intersection in buffer alloc returned %"
      GST_PTR_FORMAT, intersection);

  if (gst_caps_is_empty (intersection)) {
    GstCaps *new_caps;

    gst_caps_unref (intersection);

    /* So we don't support this kind of buffer, let's define one we'd like */
    new_caps = gst_caps_copy (caps);

    structure = gst_caps_get_structure (new_caps, 0);
    if (!gst_structure_has_field (structure, "width") ||
        !gst_structure_has_field (structure, "height")) {
      gst_caps_unref (new_caps);
      goto INVALID;
    }

    /* Try different dimensions */
    intersection =
        gst_eglglessink_different_size_suggestion (eglglessink, new_caps);

    /* YUV not implemented yet */
    if (gst_caps_is_empty (intersection)) {

      gst_structure_set_name (structure, "video/x-raw-rgb");

      /* Remove format specific fields */
      gst_structure_remove_field (structure, "format");
      gst_structure_remove_field (structure, "endianness");
      gst_structure_remove_field (structure, "depth");
      gst_structure_remove_field (structure, "bpp");
      gst_structure_remove_field (structure, "red_mask");
      gst_structure_remove_field (structure, "green_mask");
      gst_structure_remove_field (structure, "blue_mask");
      gst_structure_remove_field (structure, "alpha_mask");

      /* Reuse intersection with current_caps */
      intersection = gst_caps_intersect (eglglessink->current_caps, new_caps);
    }

    /* Try with different dimensions and RGB formats */
    if (gst_caps_is_empty (intersection))
      intersection =
          gst_eglglessink_different_size_suggestion (eglglessink, new_caps);

    /* Clean this copy */
    gst_caps_unref (new_caps);

    if (gst_caps_is_empty (intersection))
      goto INCOMPATIBLE;
  }

  /* Ensure the returned caps are fixed */
  gst_caps_truncate (intersection);

  GST_DEBUG_OBJECT (eglglessink, "Allocating a buffer with caps %"
      GST_PTR_FORMAT, intersection);
  if (gst_caps_is_equal (intersection, caps)) {
    /* Things work better if we return a buffer with the same caps ptr
     * as was asked for when we can */
    gst_caps_replace (&intersection, caps);
  }

  /* Get image format from caps */
  format = gst_eglglessink_get_compat_format_from_caps (eglglessink,
      intersection);

  if (!format)
    GST_WARNING_OBJECT (eglglessink, "Can't get a compatible format from caps");

  /* Get geometry from caps */
  structure = gst_caps_get_structure (intersection, 0);
  if (!gst_structure_get_int (structure, "width", &width) ||
      !gst_structure_get_int (structure, "height", &height) || !format)
    goto INVALID_CAPS;

REUSE_LAST_CAPS:

  GST_DEBUG_OBJECT (eglglessink, "Creating eglglesbuffer");
  eglglesbuffer = gst_eglglesbuffer_new (eglglessink, intersection);

  if (eglglesbuffer) {
    /* Make sure the buffer is cleared of any previously used flags */
    GST_MINI_OBJECT_CAST (eglglesbuffer)->flags = 0;
    gst_buffer_set_caps (GST_BUFFER_CAST (eglglesbuffer), intersection);
  }

  *buf = GST_BUFFER_CAST (eglglesbuffer);

BEACH:
  if (intersection) {
    gst_caps_unref (intersection);
  }

  return ret;

  /* ERRORS */
INVALID:
  {
    GST_DEBUG_OBJECT (eglglessink, "No width/height on caps!?");
    ret = GST_FLOW_WRONG_STATE;
    goto BEACH;
  }
INCOMPATIBLE:
  {
    GST_WARNING_OBJECT (eglglessink, "We were requested a buffer with "
        "caps %" GST_PTR_FORMAT ", but our current caps %" GST_PTR_FORMAT
        " are completely incompatible!", caps, eglglessink->current_caps);
    ret = GST_FLOW_NOT_NEGOTIATED;
    goto BEACH;
  }
INVALID_CAPS:
  {
    GST_WARNING_OBJECT (eglglessink, "Invalid caps for buffer allocation %"
        GST_PTR_FORMAT, intersection);
    ret = GST_FLOW_NOT_NEGOTIATED;
    goto BEACH;
  }
NO_CAPS:
  {
    GST_WARNING_OBJECT (eglglessink, "Have no caps, doing fallback allocation");
    *buf = NULL;
    ret = GST_FLOW_OK;
    goto BEACH;
  }
}

static inline gint
gst_eglglessink_fill_supported_fbuffer_configs (GstEglGlesSink * eglglessink)
{
  gint ret = 0;
  EGLint cfg_number;
  GstEglGlesImageFmt *format;
  GstCaps *caps;

  GST_DEBUG_OBJECT (eglglessink,
      "Building initial list of wanted eglattribs per format");

  /* Init supported format/caps list */
  caps = gst_caps_new_empty ();

  if (eglChooseConfig (eglglessink->eglglesctx.display,
          eglglessink_RGBA8888_attribs, NULL, 1, &cfg_number) != EGL_FALSE) {
    format = g_new0 (GstEglGlesImageFmt, 1);
    format->fmt = GST_EGLGLESSINK_IMAGE_RGBA8888;
    format->attribs = eglglessink_RGBA8888_attribs;
    format->caps = gst_video_format_new_template_caps (GST_VIDEO_FORMAT_RGBA);
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_BGRA));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_ARGB));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_ABGR));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_RGBx));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_BGRx));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_xRGB));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_xBGR));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_AYUV));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_Y444));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_I420));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_YV12));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_NV12));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_NV21));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_YUY2));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_YVYU));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_UYVY));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_Y42B));
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_Y41B));
    eglglessink->supported_fmts =
        g_list_append (eglglessink->supported_fmts, format);
    ret++;
    gst_caps_append (caps, gst_caps_ref (format->caps));
  } else {
    GST_INFO_OBJECT (eglglessink,
        "EGL display doesn't support RGBA8888 config");
  }

  if (eglChooseConfig (eglglessink->eglglesctx.display,
          eglglessink_RGB888_attribs, NULL, 1, &cfg_number) != EGL_FALSE) {
    format = g_new0 (GstEglGlesImageFmt, 1);
    format->fmt = GST_EGLGLESSINK_IMAGE_RGB888;
    format->attribs = eglglessink_RGB888_attribs;
    format->caps = gst_video_format_new_template_caps (GST_VIDEO_FORMAT_RGB);
    gst_caps_append (format->caps,
        gst_video_format_new_template_caps (GST_VIDEO_FORMAT_BGR));
    eglglessink->supported_fmts =
        g_list_append (eglglessink->supported_fmts, format);
    ret++;
    gst_caps_append (caps, gst_caps_ref (format->caps));
  } else {
    GST_INFO_OBJECT (eglglessink, "EGL display doesn't support RGB888 config");
  }

  if (eglChooseConfig (eglglessink->eglglesctx.display,
          eglglessink_RGB565_attribs, NULL, 1, &cfg_number) != EGL_FALSE) {
    format = g_new0 (GstEglGlesImageFmt, 1);
    format->fmt = GST_EGLGLESSINK_IMAGE_RGB565;
    format->attribs = eglglessink_RGB565_attribs;
    format->caps = gst_video_format_new_template_caps (GST_VIDEO_FORMAT_RGB16);
    eglglessink->supported_fmts =
        g_list_append (eglglessink->supported_fmts, format);
    ret++;
    gst_caps_append (caps, gst_caps_ref (format->caps));
  } else {
    GST_INFO_OBJECT (eglglessink, "EGL display doesn't support RGB565 config");
  }

  GST_OBJECT_LOCK (eglglessink);
  gst_caps_replace (&eglglessink->sinkcaps, caps);
  GST_OBJECT_UNLOCK (eglglessink);
  gst_caps_unref (caps);

  return ret;
}

static inline gboolean
egl_init (GstEglGlesSink * eglglessink)
{
  if (!platform_wrapper_init ()) {
    GST_ERROR_OBJECT (eglglessink, "Couldn't init EGL platform wrapper");
    goto HANDLE_ERROR;
  }

  if (!gst_eglglessink_init_egl_display (eglglessink)) {
    GST_ERROR_OBJECT (eglglessink, "Couldn't init EGL display");
    goto HANDLE_ERROR;
  }

  gst_eglglessink_init_egl_exts (eglglessink);

  if (!gst_eglglessink_fill_supported_fbuffer_configs (eglglessink)) {
    GST_ERROR_OBJECT (eglglessink, "Display support NONE of our configs");
    goto HANDLE_ERROR;
  }

  eglglessink->egl_started = TRUE;

  return TRUE;

HANDLE_ERROR:
  GST_ERROR_OBJECT (eglglessink, "Failed to perform EGL init");
  return FALSE;
}

static gboolean
gst_eglglessink_start (GstEglGlesSink * eglglessink)
{
  if (!eglglessink->egl_started) {
    GST_ERROR_OBJECT (eglglessink, "EGL uninitialized. Bailing out");
    goto HANDLE_ERROR;
  }

  /* Ask for a window to render to */
  if (!eglglessink->have_window)
    gst_x_overlay_prepare_xwindow_id (GST_X_OVERLAY (eglglessink));

  if (!eglglessink->have_window && !eglglessink->create_window) {
    GST_ERROR_OBJECT (eglglessink, "Window handle unavailable and we "
        "were instructed not to create an internal one. Bailing out.");
    goto HANDLE_ERROR;
  }

  return TRUE;

HANDLE_ERROR:
  GST_ERROR_OBJECT (eglglessink, "Couldn't start");
  return FALSE;
}

static gboolean
gst_eglglessink_stop (GstEglGlesSink * eglglessink)
{
  /* EGL/GLES2 cleanup */
  if (!gst_eglglessink_context_make_current (eglglessink, TRUE, FALSE))
    return FALSE;

  if (eglglessink->rendering_path == GST_EGLGLESSINK_RENDER_SLOW) {
    glUseProgram (0);

    if (eglglessink->have_vbo) {
      glDeleteBuffers (1, &eglglessink->eglglesctx.position_buffer);
      glDeleteBuffers (1, &eglglessink->eglglesctx.texpos_buffer);
      glDeleteBuffers (1, &eglglessink->eglglesctx.index_buffer);
      eglglessink->have_vbo = FALSE;
    }

    if (eglglessink->have_texture) {
      glDeleteTextures (eglglessink->eglglesctx.n_textures,
          eglglessink->eglglesctx.texture);
      eglglessink->have_texture = FALSE;
      eglglessink->eglglesctx.n_textures = 0;
    }

    if (eglglessink->eglglesctx.glslprogram) {
      glDetachShader (eglglessink->eglglesctx.glslprogram,
          eglglessink->eglglesctx.fragshader);
      glDetachShader (eglglessink->eglglesctx.glslprogram,
          eglglessink->eglglesctx.vertshader);
      glDeleteProgram (eglglessink->eglglesctx.glslprogram);
      glDeleteShader (eglglessink->eglglesctx.fragshader);
      glDeleteShader (eglglessink->eglglesctx.vertshader);
      eglglessink->eglglesctx.glslprogram = 0;
    }
  }

  if (!gst_eglglessink_context_make_current (eglglessink, FALSE, FALSE))
    return FALSE;

  if (eglglessink->eglglesctx.surface) {
    eglDestroySurface (eglglessink->eglglesctx.display,
        eglglessink->eglglesctx.surface);
    eglglessink->eglglesctx.surface = NULL;
    eglglessink->have_surface = FALSE;
  }

  if (eglglessink->eglglesctx.eglcontext) {
    eglDestroyContext (eglglessink->eglglesctx.display,
        eglglessink->eglglesctx.eglcontext);
    eglglessink->eglglesctx.eglcontext = NULL;
  }

  if (eglglessink->using_own_window) {
    platform_destroy_native_window (eglglessink->eglglesctx.display,
        eglglessink->eglglesctx.used_window);
    eglglessink->eglglesctx.used_window = NULL;
    eglglessink->have_window = FALSE;
  }
  eglglessink->eglglesctx.used_window = NULL;
  if (eglglessink->current_caps) {
    gst_caps_unref (eglglessink->current_caps);
    eglglessink->current_caps = NULL;
  }

  return TRUE;
}

static void
gst_eglglessink_xoverlay_init (GstXOverlayClass * iface)
{
  iface->set_window_handle = gst_eglglessink_set_window_handle;
  iface->expose = gst_eglglessink_expose;
  iface->set_render_rectangle = gst_eglglessink_set_render_rectangle;
}

static gboolean
gst_eglglessink_interface_supported (GstImplementsInterface * iface, GType type)
{
  return (type == GST_TYPE_X_OVERLAY);
}

static void
gst_eglglessink_implements_init (GstImplementsInterfaceClass * klass)
{
  klass->supported = gst_eglglessink_interface_supported;
}

static inline gboolean
got_gl_error (const char *wtf)
{
  GLuint error = GL_NO_ERROR;

  if ((error = glGetError ()) != GL_NO_ERROR) {
    GST_CAT_ERROR (GST_CAT_DEFAULT, "GL ERROR: %s returned %x", wtf, error);
    return TRUE;
  }
  return FALSE;
}

static inline void
show_egl_error (const char *wtf)
{
  EGLint error;

  if ((error = eglGetError ()) != EGL_SUCCESS)
    GST_CAT_DEBUG (GST_CAT_DEFAULT, "EGL ERROR: %s returned %x", wtf, error);
}

static EGLNativeWindowType
gst_eglglessink_create_window (GstEglGlesSink * eglglessink, gint width,
    gint height)
{
  EGLNativeWindowType window = 0;

  if (!eglglessink->create_window) {
    GST_ERROR_OBJECT (eglglessink, "This sink can't create a window by itself");
    return window;
  } else
    GST_INFO_OBJECT (eglglessink, "Attempting internal window creation");

  window = platform_create_native_window (width, height);
  if (!window) {
    GST_ERROR_OBJECT (eglglessink, "Could not create window");
    return window;
  }
  gst_x_overlay_got_window_handle (GST_X_OVERLAY (eglglessink),
      (guintptr) window);
  return window;
}

static void
gst_eglglessink_expose (GstXOverlay * overlay)
{
  GstEglGlesSink *eglglessink;
  GstFlowReturn ret;

  eglglessink = GST_EGLGLESSINK (overlay);
  GST_DEBUG_OBJECT (eglglessink, "Expose catched, redisplay");

  /* Render from last seen buffer */
  ret = gst_eglglessink_render_and_display (eglglessink, NULL);
  if (ret == GST_FLOW_ERROR)
    GST_ERROR_OBJECT (eglglessink, "Redisplay failed");
}

/* Checks available EGL/GLES extensions and chooses
 * a suitable rendering path from GstEglGlesSinkRenderingPath
 * accordingly. This function can only be called after an
 * EGL context has been made current.
 */
static void
gst_eglglessink_init_egl_exts (GstEglGlesSink * eglglessink)
{
  const char *eglexts;
  unsigned const char *glexts;

  eglexts = eglQueryString (eglglessink->eglglesctx.display, EGL_EXTENSIONS);
  glexts = glGetString (GL_EXTENSIONS);

  GST_DEBUG_OBJECT (eglglessink, "Available EGL extensions: %s\n", GST_STR_NULL (eglexts));
  GST_DEBUG_OBJECT (eglglessink, "Available GLES extensions: %s\n", GST_STR_NULL ((const char *) glexts));

#ifdef EGL_FAST_RENDERING_POSSIBLE
  /* OK Fast rendering should be possible from the declared
   * extensions on the eglexts/glexts.h headers
   */

  /* Check for support from claimed EGL/GLES extensions */

  if (!eglexts || !strstr (eglexts, "EGL_KHR_image"))
    goto KHR_IMAGE_NA;
  if (!eglexts || !strstr (eglexts, "EGL_KHR_lock_surface"))
    goto SURFACE_LOCK_NA;
  if (!glexts || !strstr ((char *) glexts, "GL_OES_EGL_image"))
    goto TEXTURE_2DOES_NA;

  /* Check for actual extension proc addresses */

  my_eglCreateImageKHR =
      (PFNEGLCREATEIMAGEKHRPROC) eglGetProcAddress ("eglCreateImageKHR");
  my_eglDestroyImageKHR =
      (PFNEGLDESTROYIMAGEKHRPROC) eglGetProcAddress ("eglDestroyImageKHR");

  if (!my_eglCreateImageKHR || !my_eglDestroyImageKHR) {
  KHR_IMAGE_NA:
    GST_INFO_OBJECT (eglglessink, "Extension missing: EGL_KHR_image");
    goto MISSING_EXTS;
  }

  my_eglLockSurfaceKHR =
      (PFNEGLLOCKSURFACEKHRPROC) eglGetProcAddress ("eglLockSurfaceKHR");
  my_eglUnlockSurfaceKHR =
      (PFNEGLUNLOCKSURFACEKHRPROC) eglGetProcAddress ("eglUnlockSurfaceKHR");

  if (!my_eglLockSurfaceKHR || !my_eglUnlockSurfaceKHR) {
  SURFACE_LOCK_NA:
    GST_INFO_OBJECT (eglglessink, "Extension missing: EGL_KHR_lock_surface");
    goto MISSING_EXTS;
  }

  my_glEGLImageTargetTexture2DOES =
      (PFNGLEGLIMAGETARGETTEXTURE2DOESPROC) eglGetProcAddress
      ("glEGLImageTargetTexture2DOES");

  if (!my_glEGLImageTargetTexture2DOES) {
  TEXTURE_2DOES_NA:
    GST_INFO_OBJECT (eglglessink, "Extension missing: GL_OES_EGL_image");
    goto MISSING_EXTS;
  }

  if (!eglglessink->force_rendering_slow) {
    GST_INFO_OBJECT (eglglessink,
        "Have needed extensions for fast rendering path");
  } else {
    GST_WARNING_OBJECT (eglglessink,
        "Extension check passed but slow rendering path being forced");
    goto SLOW_PATH_SELECTED;
  }

  /* Extension check passed. Enable fast rendering path */
  eglglessink->rendering_path = GST_EGLGLESSINK_RENDER_FAST;
  GST_INFO_OBJECT (eglglessink, "Using fast rendering path");
  return;
#endif

MISSING_EXTS:
  GST_WARNING_OBJECT (eglglessink,
      "Extensions missing. Can't use fast rendering path");
SLOW_PATH_SELECTED:
  eglglessink->rendering_path = GST_EGLGLESSINK_RENDER_SLOW;
  GST_INFO_OBJECT (eglglessink, "Using slow rendering path");
  return;
}

static gboolean
gst_eglglessink_setup_vbo (GstEglGlesSink * eglglessink, gboolean reset)
{
  GST_INFO_OBJECT (eglglessink, "VBO setup. have_vbo:%d, should reset %d",
      eglglessink->have_vbo, reset);

  if (eglglessink->have_vbo && reset) {
    glDeleteBuffers (1, &eglglessink->eglglesctx.position_buffer);
    glDeleteBuffers (1, &eglglessink->eglglesctx.texpos_buffer);
    glDeleteBuffers (1, &eglglessink->eglglesctx.index_buffer);
    eglglessink->have_vbo = FALSE;
  }

  if (!eglglessink->have_vbo) {
    GST_DEBUG_OBJECT (eglglessink, "Performing VBO setup");
    eglglessink->eglglesctx.position_array[0].x = 1;
    eglglessink->eglglesctx.position_array[0].y = 1;
    eglglessink->eglglesctx.position_array[0].z = 0;

    eglglessink->eglglesctx.position_array[1].x = 1;
    eglglessink->eglglesctx.position_array[1].y = -1;
    eglglessink->eglglesctx.position_array[1].z = 0;

    eglglessink->eglglesctx.position_array[2].x = -1;
    eglglessink->eglglesctx.position_array[2].y = 1;
    eglglessink->eglglesctx.position_array[2].z = 0;

    eglglessink->eglglesctx.position_array[3].x = -1;
    eglglessink->eglglesctx.position_array[3].y = -1;
    eglglessink->eglglesctx.position_array[3].z = 0;

    eglglessink->eglglesctx.texpos_array[0].x = 1;
    eglglessink->eglglesctx.texpos_array[0].y = 0;

    eglglessink->eglglesctx.texpos_array[1].x = 1;
    eglglessink->eglglesctx.texpos_array[1].y = 1;

    eglglessink->eglglesctx.texpos_array[2].x = 0;
    eglglessink->eglglesctx.texpos_array[2].y = 0;

    eglglessink->eglglesctx.texpos_array[3].x = 0;
    eglglessink->eglglesctx.texpos_array[3].y = 1;

    eglglessink->eglglesctx.index_array[0] = 0;
    eglglessink->eglglesctx.index_array[1] = 1;
    eglglessink->eglglesctx.index_array[2] = 2;
    eglglessink->eglglesctx.index_array[3] = 3;

    glGenBuffers (1, &eglglessink->eglglesctx.position_buffer);
    glGenBuffers (1, &eglglessink->eglglesctx.texpos_buffer);
    glGenBuffers (1, &eglglessink->eglglesctx.index_buffer);
    if (got_gl_error ("glGenBuffers"))
      goto HANDLE_ERROR_LOCKED;

    glBindBuffer (GL_ARRAY_BUFFER, eglglessink->eglglesctx.position_buffer);
    if (got_gl_error ("glBindBuffer position_buffer"))
      goto HANDLE_ERROR_LOCKED;

    glBufferData (GL_ARRAY_BUFFER,
        sizeof (eglglessink->eglglesctx.position_array),
        eglglessink->eglglesctx.position_array, GL_STATIC_DRAW);
    if (got_gl_error ("glBufferData position_buffer"))
      goto HANDLE_ERROR_LOCKED;

    glVertexAttribPointer (eglglessink->eglglesctx.position_loc, 3, GL_FLOAT,
        GL_FALSE, 0, 0);
    if (got_gl_error ("glVertexAttribPointer"))
      goto HANDLE_ERROR_LOCKED;

    glEnableVertexAttribArray (eglglessink->eglglesctx.position_loc);
    if (got_gl_error ("glEnableVertexAttribArray"))
      goto HANDLE_ERROR_LOCKED;

    glBindBuffer (GL_ARRAY_BUFFER, eglglessink->eglglesctx.texpos_buffer);
    if (got_gl_error ("glBindBuffer texpos_buffer"))
      goto HANDLE_ERROR_LOCKED;

    glBufferData (GL_ARRAY_BUFFER,
        sizeof (eglglessink->eglglesctx.texpos_array),
        eglglessink->eglglesctx.texpos_array, GL_STATIC_DRAW);
    if (got_gl_error ("glBufferData texpos_buffer"))
      goto HANDLE_ERROR_LOCKED;

    glVertexAttribPointer (eglglessink->eglglesctx.texpos_loc, 2, GL_FLOAT,
        GL_FALSE, 0, 0);
    if (got_gl_error ("glVertexAttribPointer"))
      goto HANDLE_ERROR_LOCKED;

    glEnableVertexAttribArray (eglglessink->eglglesctx.texpos_loc);
    if (got_gl_error ("glEnableVertexAttribArray"))
      goto HANDLE_ERROR_LOCKED;

    glBindBuffer (GL_ELEMENT_ARRAY_BUFFER,
        eglglessink->eglglesctx.index_buffer);
    if (got_gl_error ("glBindBuffer index_buffer"))
      goto HANDLE_ERROR_LOCKED;

    glBufferData (GL_ELEMENT_ARRAY_BUFFER,
        sizeof (eglglessink->eglglesctx.index_array),
        eglglessink->eglglesctx.index_array, GL_STATIC_DRAW);
    if (got_gl_error ("glBufferData index_buffer"))
      goto HANDLE_ERROR_LOCKED;

    eglglessink->have_vbo = TRUE;
  } else {
    GST_INFO_OBJECT (eglglessink, "Won't perform VBO setup");
  }

  return TRUE;

HANDLE_ERROR_LOCKED:
  GST_ERROR_OBJECT (eglglessink, "Unable to perform VBO setup");
  return FALSE;
}

/* XXX: Lock eglgles context? */
static gboolean
gst_eglglessink_update_surface_dimensions (GstEglGlesSink * eglglessink)
{
  gint width, height;
  EGLint display_par;

  /* Save surface dims */
  eglQuerySurface (eglglessink->eglglesctx.display,
      eglglessink->eglglesctx.surface, EGL_WIDTH, &width);
  eglQuerySurface (eglglessink->eglglesctx.display,
      eglglessink->eglglesctx.surface, EGL_HEIGHT, &height);

  /* Save display's pixel aspect ratio
   *
   * DAR is reported as w/h * EGL_DISPLAY_SCALING wich is
   * a constant with value 10000. This attribute is only
   * supported if the EGL version is >= 1.2
   * XXX: Setup this as a property.
   * XXX: Move this initialization out to init_egl_surface()
   * or some other one time check. Right now it's being called once
   * per frame.
   */
  if (eglglessink->eglglesctx.egl_major == 1 &&
      eglglessink->eglglesctx.egl_minor < 2) {
    GST_DEBUG_OBJECT (eglglessink, "Can't query PAR. Using default: %dx%d",
        EGL_DISPLAY_SCALING, EGL_DISPLAY_SCALING);
    eglglessink->eglglesctx.pixel_aspect_ratio = EGL_DISPLAY_SCALING;
  } else {
    eglQuerySurface (eglglessink->eglglesctx.display,
        eglglessink->eglglesctx.surface, EGL_PIXEL_ASPECT_RATIO,
        &display_par);
   /* Fix for outbound DAR reporting on some implementations not
    * honoring the 'should return w/h * EGL_DISPLAY_SCALING' spec
    * requirement
    */
    if (display_par == EGL_UNKNOWN || display_par < EGL_SANE_DAR_MIN ||
        display_par > EGL_SANE_DAR_MAX) {
      GST_DEBUG_OBJECT (eglglessink, "Nonsensical PAR value returned: %d. "
          "Bad EGL implementation? "
          "Will use default: %d/%d", eglglessink->eglglesctx.pixel_aspect_ratio,
          EGL_DISPLAY_SCALING, EGL_DISPLAY_SCALING);
      eglglessink->eglglesctx.pixel_aspect_ratio = EGL_DISPLAY_SCALING;
    } else {
      eglglessink->eglglesctx.pixel_aspect_ratio = display_par;
    }
  }

  if (width != eglglessink->eglglesctx.surface_width ||
      height != eglglessink->eglglesctx.surface_height) {
    eglglessink->eglglesctx.surface_width = width;
    eglglessink->eglglesctx.surface_height = height;
    GST_INFO_OBJECT (eglglessink, "Got surface of %dx%d pixels", width, height);
    return TRUE;
  }

  return FALSE;
}

static pthread_key_t context_key;

static void
detach_context (void *data)
{
  GstEglGlesSink *eglglessink = data;

  GST_DEBUG_OBJECT (eglglessink,
      "Detaching current context from streaming thread");
  gst_eglglessink_context_make_current (eglglessink, FALSE, TRUE);
  gst_object_unref (eglglessink);
}

static gboolean
gst_eglglessink_context_make_current (GstEglGlesSink * eglglessink,
    gboolean bind, gboolean streaming_thread)
{
  g_assert (eglglessink->eglglesctx.display != NULL);

  if (bind && eglglessink->eglglesctx.surface &&
      eglglessink->eglglesctx.eglcontext) {
    if (streaming_thread) {
      EGLContext *ctx = eglGetCurrentContext ();

      if (ctx == eglglessink->eglglesctx.eglcontext) {
        GST_DEBUG_OBJECT (eglglessink, "Already attached the context");
        return TRUE;
      }

      GST_DEBUG_OBJECT (eglglessink, "Attaching context to streaming thread");
      if (!eglMakeCurrent (eglglessink->eglglesctx.display,
              eglglessink->eglglesctx.surface,
              eglglessink->eglglesctx.surface,
              eglglessink->eglglesctx.eglcontext)) {
        show_egl_error ("eglMakeCurrent");
        GST_ERROR_OBJECT (eglglessink, "Couldn't bind context");
        return FALSE;
      }

      if (!pthread_getspecific (context_key)) {
        pthread_setspecific (context_key, gst_object_ref (eglglessink));
      }
    } else {
      GST_DEBUG_OBJECT (eglglessink, "Attaching context");
      if (!eglMakeCurrent (eglglessink->eglglesctx.display,
              eglglessink->eglglesctx.surface,
              eglglessink->eglglesctx.surface,
              eglglessink->eglglesctx.eglcontext)) {
        show_egl_error ("eglMakeCurrent");
        GST_ERROR_OBJECT (eglglessink, "Couldn't bind context");
        return FALSE;
      }
    }
  } else {
    GST_DEBUG_OBJECT (eglglessink, "Detaching context");
    if (!eglMakeCurrent (eglglessink->eglglesctx.display,
            EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT)) {
      show_egl_error ("eglMakeCurrent");
      GST_ERROR_OBJECT (eglglessink, "Couldn't unbind context");
      return FALSE;
    }
  }

  return TRUE;
}

static gboolean
gst_eglglessink_init_egl_surface (GstEglGlesSink * eglglessink)
{
  GLint test;
  GLboolean ret;
  GLchar *info_log;
  const gchar *texnames[3] = { NULL, };
  gchar *tmp_prog = NULL;

  GST_DEBUG_OBJECT (eglglessink, "Enter EGL surface setup");

  eglglessink->eglglesctx.surface =
      eglCreateWindowSurface (eglglessink->eglglesctx.display,
      eglglessink->eglglesctx.config, eglglessink->eglglesctx.used_window,
      NULL);

  if (eglglessink->eglglesctx.surface == EGL_NO_SURFACE) {
    show_egl_error ("eglCreateWindowSurface");
    GST_ERROR_OBJECT (eglglessink, "Can't create surface");
    goto HANDLE_EGL_ERROR_LOCKED;
  }

  if (!gst_eglglessink_context_make_current (eglglessink, TRUE, TRUE))
    goto HANDLE_EGL_ERROR_LOCKED;

  /* Save surface dims */
  gst_eglglessink_update_surface_dimensions (eglglessink);

  /* We have a surface! */
  eglglessink->have_surface = TRUE;

  /* Init vertex and fragment GLSL shaders. This entire block might need to be
   * runtime conditional once the fast rendering path gets fully implemented.
   *
   * Note: Shader compiler support is optional but we currently rely on it.
   */

  glGetBooleanv (GL_SHADER_COMPILER, &ret);
  if (ret == GL_FALSE) {
    GST_ERROR_OBJECT (eglglessink, "Shader compiler support is unavailable!");
    goto HANDLE_ERROR;
  }

  eglglessink->eglglesctx.vertshader = glCreateShader (GL_VERTEX_SHADER);
  GST_DEBUG_OBJECT (eglglessink, "Sending %s to handle %d", vert_COPY_prog,
      eglglessink->eglglesctx.vertshader);
  glShaderSource (eglglessink->eglglesctx.vertshader, 1, &vert_COPY_prog,
      NULL);
  if (got_gl_error ("glShaderSource vertex"))
    goto HANDLE_ERROR;

  glCompileShader (eglglessink->eglglesctx.vertshader);
  if (got_gl_error ("glCompileShader vertex"))
    goto HANDLE_ERROR;

  glGetShaderiv (eglglessink->eglglesctx.vertshader, GL_COMPILE_STATUS, &test);
  if (test != GL_FALSE)
    GST_DEBUG_OBJECT (eglglessink, "Successfully compiled vertex shader");
  else {
    GST_ERROR_OBJECT (eglglessink, "Couldn't compile vertex shader");
    glGetShaderiv (eglglessink->eglglesctx.vertshader, GL_INFO_LOG_LENGTH,
        &test);
    info_log = g_new0 (GLchar, test);
    glGetShaderInfoLog (eglglessink->eglglesctx.vertshader, test, NULL,
        info_log);
    GST_INFO_OBJECT (eglglessink, "Compilation info log:\n%s", info_log);
    g_free (info_log);
    goto HANDLE_ERROR;
  }

  eglglessink->eglglesctx.fragshader = glCreateShader (GL_FRAGMENT_SHADER);
  switch (eglglessink->format) {
    case GST_VIDEO_FORMAT_AYUV:
      glShaderSource (eglglessink->eglglesctx.fragshader, 1, &frag_AYUV_prog,
          NULL);
      eglglessink->eglglesctx.n_textures = 1;
      texnames[0] = "tex";
      break;
    case GST_VIDEO_FORMAT_Y444:
    case GST_VIDEO_FORMAT_I420:
    case GST_VIDEO_FORMAT_YV12:
    case GST_VIDEO_FORMAT_Y42B:
    case GST_VIDEO_FORMAT_Y41B:
      glShaderSource (eglglessink->eglglesctx.fragshader, 1,
          &frag_PLANAR_YUV_prog, NULL);
      eglglessink->eglglesctx.n_textures = 3;
      texnames[0] = "Ytex";
      texnames[1] = "Utex";
      texnames[2] = "Vtex";
      break;
    case GST_VIDEO_FORMAT_YUY2:
      tmp_prog = g_strdup_printf (frag_YUY2_YVYU_UYVY_prog, 'r', 'g', 'a');
      glShaderSource (eglglessink->eglglesctx.fragshader, 1,
          (const GLchar **) &tmp_prog, NULL);
      eglglessink->eglglesctx.n_textures = 2;
      texnames[0] = "Ytex";
      texnames[1] = "UVtex";
      break;
    case GST_VIDEO_FORMAT_YVYU:
      tmp_prog = g_strdup_printf (frag_YUY2_YVYU_UYVY_prog, 'r', 'a', 'g');
      glShaderSource (eglglessink->eglglesctx.fragshader, 1,
          (const GLchar **) &tmp_prog, NULL);
      eglglessink->eglglesctx.n_textures = 2;
      texnames[0] = "Ytex";
      texnames[1] = "UVtex";
      break;
    case GST_VIDEO_FORMAT_UYVY:
      tmp_prog = g_strdup_printf (frag_YUY2_YVYU_UYVY_prog, 'a', 'r', 'b');
      glShaderSource (eglglessink->eglglesctx.fragshader, 1,
          (const GLchar **) &tmp_prog, NULL);
      eglglessink->eglglesctx.n_textures = 2;
      texnames[0] = "Ytex";
      texnames[1] = "UVtex";
      break;
    case GST_VIDEO_FORMAT_NV12:
      tmp_prog = g_strdup_printf (frag_NV12_NV21_prog, 'r', 'a');
      glShaderSource (eglglessink->eglglesctx.fragshader, 1,
          (const GLchar **) &tmp_prog, NULL);
      eglglessink->eglglesctx.n_textures = 2;
      texnames[0] = "Ytex";
      texnames[1] = "UVtex";
      break;
    case GST_VIDEO_FORMAT_NV21:
      tmp_prog = g_strdup_printf (frag_NV12_NV21_prog, 'a', 'r');
      glShaderSource (eglglessink->eglglesctx.fragshader, 1,
          (const GLchar **) &tmp_prog, NULL);
      eglglessink->eglglesctx.n_textures = 2;
      texnames[0] = "Ytex";
      texnames[1] = "UVtex";
      break;
    case GST_VIDEO_FORMAT_BGR:
    case GST_VIDEO_FORMAT_BGRx:
    case GST_VIDEO_FORMAT_BGRA:
      tmp_prog = g_strdup_printf (frag_REORDER_prog, 'b', 'g', 'r');
      glShaderSource (eglglessink->eglglesctx.fragshader, 1,
          (const GLchar **) &tmp_prog, NULL);
      eglglessink->eglglesctx.n_textures = 1;
      texnames[0] = "tex";
      break;
    case GST_VIDEO_FORMAT_xRGB:
    case GST_VIDEO_FORMAT_ARGB:
      tmp_prog = g_strdup_printf (frag_REORDER_prog, 'g', 'b', 'a');
      glShaderSource (eglglessink->eglglesctx.fragshader, 1,
          (const GLchar **) &tmp_prog, NULL);
      eglglessink->eglglesctx.n_textures = 1;
      texnames[0] = "tex";
      break;
    case GST_VIDEO_FORMAT_xBGR:
    case GST_VIDEO_FORMAT_ABGR:
      tmp_prog = g_strdup_printf (frag_REORDER_prog, 'a', 'b', 'g');
      glShaderSource (eglglessink->eglglesctx.fragshader, 1,
          (const GLchar **) &tmp_prog, NULL);
      eglglessink->eglglesctx.n_textures = 1;
      texnames[0] = "tex";
      break;
    case GST_VIDEO_FORMAT_RGB:
    case GST_VIDEO_FORMAT_RGBx:
    case GST_VIDEO_FORMAT_RGBA:
    case GST_VIDEO_FORMAT_RGB16:
      glShaderSource (eglglessink->eglglesctx.fragshader, 1, &frag_COPY_prog,
          NULL);
      eglglessink->eglglesctx.n_textures = 1;
      texnames[0] = "tex";
      break;
    default:
      g_assert_not_reached ();
      break;
  }

  if (got_gl_error ("glShaderSource fragment"))
    goto HANDLE_ERROR;

  glCompileShader (eglglessink->eglglesctx.fragshader);
  if (got_gl_error ("glCompileShader fragment"))
    goto HANDLE_ERROR;

  glGetShaderiv (eglglessink->eglglesctx.fragshader, GL_COMPILE_STATUS, &test);
  if (test != GL_FALSE)
    GST_DEBUG_OBJECT (eglglessink, "Successfully compiled fragment shader");
  else {
    GST_ERROR_OBJECT (eglglessink, "Couldn't compile fragment shader");
    glGetShaderiv (eglglessink->eglglesctx.fragshader, GL_INFO_LOG_LENGTH,
        &test);
    info_log = g_new0 (GLchar, test);
    glGetShaderInfoLog (eglglessink->eglglesctx.fragshader, test, NULL,
        info_log);
    GST_INFO_OBJECT (eglglessink, "Compilation info log:\n%s", info_log);
    g_free (info_log);
    goto HANDLE_ERROR;
  }

  eglglessink->eglglesctx.glslprogram = glCreateProgram ();
  if (got_gl_error ("glCreateProgram"))
    goto HANDLE_ERROR;
  glAttachShader (eglglessink->eglglesctx.glslprogram,
      eglglessink->eglglesctx.vertshader);
  if (got_gl_error ("glAttachShader vertices"))
    goto HANDLE_ERROR;
  glAttachShader (eglglessink->eglglesctx.glslprogram,
      eglglessink->eglglesctx.fragshader);
  if (got_gl_error ("glAttachShader fragments"))
    goto HANDLE_ERROR;
  glLinkProgram (eglglessink->eglglesctx.glslprogram);
  glGetProgramiv (eglglessink->eglglesctx.glslprogram, GL_LINK_STATUS, &test);
  if (test != GL_FALSE)
    GST_DEBUG_OBJECT (eglglessink, "GLES: Successfully linked program");
  else {
    GST_ERROR_OBJECT (eglglessink, "Couldn't link program");
    goto HANDLE_ERROR;
  }

  glUseProgram (eglglessink->eglglesctx.glslprogram);
  if (got_gl_error ("glUseProgram"))
    goto HANDLE_ERROR;

  eglglessink->eglglesctx.position_loc =
      glGetAttribLocation (eglglessink->eglglesctx.glslprogram, "position");
  eglglessink->eglglesctx.texpos_loc =
      glGetAttribLocation (eglglessink->eglglesctx.glslprogram, "texpos");

  /* Generate and bind texture */
  if (!eglglessink->have_texture) {
    gint i;

    GST_INFO_OBJECT (eglglessink, "Performing initial texture setup");

    for (i = 0; i < eglglessink->eglglesctx.n_textures; i++) {
      if (i == 0)
        glActiveTexture (GL_TEXTURE0);
      else if (i == 1)
        glActiveTexture (GL_TEXTURE1);
      else if (i == 2)
        glActiveTexture (GL_TEXTURE2);

      glGenTextures (1, &eglglessink->eglglesctx.texture[i]);
      if (got_gl_error ("glGenTextures"))
        goto HANDLE_ERROR_LOCKED;

      glBindTexture (GL_TEXTURE_2D, eglglessink->eglglesctx.texture[i]);
      if (got_gl_error ("glBindTexture"))
        goto HANDLE_ERROR_LOCKED;

      eglglessink->eglglesctx.tex_loc[i] =
          glGetUniformLocation (eglglessink->eglglesctx.glslprogram,
          texnames[i]);
      glUniform1i (eglglessink->eglglesctx.tex_loc[i], i);

      /* Set 2D resizing params */
      glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
      glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
      /* If these are not set the texture image unit will return
       * (R, G, B, A) = black on glTexImage2D for non-POT width/height
       * frames. For a deeper explanation take a look at the OpenGL ES
       * documentation for glTexParameter */
      glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
      glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
      if (got_gl_error ("glTexParameteri"))
        goto HANDLE_ERROR_LOCKED;
    }

    eglglessink->have_texture = TRUE;
  }

  g_free (tmp_prog);

  return TRUE;

  /* Errors */
HANDLE_EGL_ERROR_LOCKED:
  GST_ERROR_OBJECT (eglglessink, "EGL call returned error %x", eglGetError ());
HANDLE_ERROR_LOCKED:
HANDLE_ERROR:
  GST_ERROR_OBJECT (eglglessink, "Couldn't setup EGL surface");
  g_free (tmp_prog);
  return FALSE;
}

static gboolean
gst_eglglessink_init_egl_display (GstEglGlesSink * eglglessink)
{
  GST_DEBUG_OBJECT (eglglessink, "Enter EGL initial configuration");

  eglglessink->eglglesctx.display = eglGetDisplay (EGL_DEFAULT_DISPLAY);
  if (eglglessink->eglglesctx.display == EGL_NO_DISPLAY) {
    GST_ERROR_OBJECT (eglglessink, "Could not get EGL display connection");
    goto HANDLE_ERROR;          /* No EGL error is set by eglGetDisplay() */
  }

  if (!eglInitialize (eglglessink->eglglesctx.display,
          &eglglessink->eglglesctx.egl_major,
          &eglglessink->eglglesctx.egl_minor)) {
    show_egl_error ("eglInitialize");
    GST_ERROR_OBJECT (eglglessink, "Could not init EGL display connection");
    goto HANDLE_EGL_ERROR;
  }

  /* Check against required EGL version
   * XXX: Need to review the version requirement in terms of the needed API
   */
  if (eglglessink->eglglesctx.egl_major < GST_EGLGLESSINK_EGL_MIN_VERSION) {
    GST_ERROR_OBJECT (eglglessink, "EGL v%d needed, but you only have v%d.%d",
        GST_EGLGLESSINK_EGL_MIN_VERSION, eglglessink->eglglesctx.egl_major,
        eglglessink->eglglesctx.egl_minor);
    goto HANDLE_ERROR;
  }

  GST_INFO_OBJECT (eglglessink, "System reports supported EGL version v%d.%d",
      eglglessink->eglglesctx.egl_major, eglglessink->eglglesctx.egl_minor);

  eglBindAPI (EGL_OPENGL_ES_API);

  return TRUE;

  /* Errors */
HANDLE_EGL_ERROR:
  GST_ERROR_OBJECT (eglglessink, "EGL call returned error %x", eglGetError ());
HANDLE_ERROR:
  GST_ERROR_OBJECT (eglglessink, "Couldn't setup window/surface from handle");
  return FALSE;
}

static gboolean
gst_eglglessink_choose_config (GstEglGlesSink * eglglessink)
{
  EGLint con_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
  GLint egl_configs;

  if ((eglChooseConfig (eglglessink->eglglesctx.display,
              eglglessink->selected_fmt->attribs,
              &eglglessink->eglglesctx.config, 1,
              &egl_configs)) == EGL_FALSE) {
    show_egl_error ("eglChooseConfig");
    GST_ERROR_OBJECT (eglglessink, "eglChooseConfig failed");
    goto HANDLE_EGL_ERROR;
  }

  if (egl_configs < 1) {
    GST_ERROR_OBJECT (eglglessink,
        "Could not find matching framebuffer config");
    goto HANDLE_ERROR;
  }

  eglglessink->eglglesctx.eglcontext =
      eglCreateContext (eglglessink->eglglesctx.display,
      eglglessink->eglglesctx.config, EGL_NO_CONTEXT, con_attribs);

  if (eglglessink->eglglesctx.eglcontext == EGL_NO_CONTEXT) {
    GST_ERROR_OBJECT (eglglessink, "Error getting context, eglCreateContext");
    goto HANDLE_EGL_ERROR;
  }

  GST_DEBUG_OBJECT (eglglessink, "EGL Context: %p",
      eglglessink->eglglesctx.eglcontext);

  return TRUE;

  /* Errors */
HANDLE_EGL_ERROR:
  GST_ERROR_OBJECT (eglglessink, "EGL call returned error %x", eglGetError ());
HANDLE_ERROR:
  GST_ERROR_OBJECT (eglglessink, "Couldn't choose an usable config");
  return FALSE;
}

static void
gst_eglglessink_set_window_handle (GstXOverlay * overlay, guintptr id)
{
  GstEglGlesSink *eglglessink = GST_EGLGLESSINK (overlay);

  g_return_if_fail (GST_IS_EGLGLESSINK (eglglessink));
  GST_DEBUG_OBJECT (eglglessink, "We got a window handle!");

  /* OK, we have a new window */
  GST_OBJECT_LOCK (eglglessink);
  eglglessink->eglglesctx.window = (EGLNativeWindowType) id;
  eglglessink->have_window = TRUE;
  GST_OBJECT_UNLOCK (eglglessink);

  return;
}

static void
gst_eglglessink_set_render_rectangle (GstXOverlay * overlay, gint x, gint y,
    gint width, gint height)
{
  GstEglGlesSink *eglglessink = GST_EGLGLESSINK (overlay);

  g_return_if_fail (GST_IS_EGLGLESSINK (eglglessink));

  GST_OBJECT_LOCK (eglglessink);
  if (width == -1 && height == -1) {
    /* This is the set-defaults condition according to
     * the xOverlay interface docs
     */
    eglglessink->display_region.w = 0;
    eglglessink->display_region.h = 0;
  } else {
    eglglessink->display_region.x = x;
    eglglessink->display_region.y = y;
    eglglessink->display_region.w = width;
    eglglessink->display_region.h = height;
  }
  GST_OBJECT_UNLOCK (eglglessink);

  return;
}

/* Rendering and display */
static GstFlowReturn
gst_eglglessink_render_and_display (GstEglGlesSink * eglglessink,
    GstBuffer * buf)
{
  GstVideoRectangle frame, surface;
  gint w, h;
  guint dar_n, dar_d;

#ifdef EGL_FAST_RENDERING_POSSIBLE
  EGLImageKHR img = EGL_NO_IMAGE_KHR;
  EGLint attrs[] = { EGL_IMAGE_PRESERVED_KHR,
    EGL_FALSE, EGL_NONE, EGL_NONE
  };
#endif

  if (!gst_eglglessink_context_make_current (eglglessink, TRUE, TRUE))
    goto HANDLE_EGL_ERROR;

  w = GST_VIDEO_SINK_WIDTH (eglglessink);
  h = GST_VIDEO_SINK_HEIGHT (eglglessink);

  GST_DEBUG_OBJECT (eglglessink,
      "Got good buffer %p. Sink geometry is %dx%d size %d", buf, w, h,
      buf ? GST_BUFFER_SIZE (buf) : -1);

  switch (eglglessink->rendering_path) {
#ifdef EGL_FAST_RENDERING_POSSIBLE
    case GST_EGLGLESSINK_RENDER_FAST:
      /* XXX: Not Fully implemented */
      img =
          my_eglCreateImageKHR (eglglessink->eglglesctx.display,
          EGL_NO_CONTEXT, EGL_NATIVE_PIXMAP_KHR,
          (EGLClientBuffer) GST_BUFFER_DATA (buf), attrs);

      if (img == EGL_NO_IMAGE_KHR) {
        GST_ERROR_OBJECT (eglglessink, "my_eglCreateImageKHR failed");
        goto HANDLE_EGL_ERROR;
      }

      my_glEGLImageTargetTexture2DOES (GL_TEXTURE_2D, img);

      break;
#endif
    default:                   /* case GST_EGLGLESSINK_RENDER_SLOW */

      if (buf) {
        switch (eglglessink->selected_fmt->fmt) {
          case GST_EGLGLESSINK_IMAGE_RGB888:
            glActiveTexture (GL_TEXTURE0);
            glBindTexture (GL_TEXTURE_2D, eglglessink->eglglesctx.texture[0]);
            glTexImage2D (GL_TEXTURE_2D, 0, GL_RGB, w, h, 0, GL_RGB,
                GL_UNSIGNED_BYTE, GST_BUFFER_DATA (buf));
            break;
          case GST_EGLGLESSINK_IMAGE_RGB565:
            glActiveTexture (GL_TEXTURE0);
            glBindTexture (GL_TEXTURE_2D, eglglessink->eglglesctx.texture[0]);
            glTexImage2D (GL_TEXTURE_2D, 0, GL_RGB, w, h, 0, GL_RGB,
                GL_UNSIGNED_SHORT_5_6_5, GST_BUFFER_DATA (buf));
            break;
          case GST_EGLGLESSINK_IMAGE_RGBA8888:
            switch (eglglessink->format) {
              case GST_VIDEO_FORMAT_RGBA:
              case GST_VIDEO_FORMAT_BGRA:
              case GST_VIDEO_FORMAT_ARGB:
              case GST_VIDEO_FORMAT_ABGR:
              case GST_VIDEO_FORMAT_RGBx:
              case GST_VIDEO_FORMAT_BGRx:
              case GST_VIDEO_FORMAT_xRGB:
              case GST_VIDEO_FORMAT_xBGR:
                glActiveTexture (GL_TEXTURE0);
                glBindTexture (GL_TEXTURE_2D,
                    eglglessink->eglglesctx.texture[0]);
                glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA,
                    GL_UNSIGNED_BYTE, GST_BUFFER_DATA (buf));
                break;
              case GST_VIDEO_FORMAT_AYUV:
                glActiveTexture (GL_TEXTURE0);
                glBindTexture (GL_TEXTURE_2D,
                    eglglessink->eglglesctx.texture[0]);
                glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA,
                    GL_UNSIGNED_BYTE, GST_BUFFER_DATA (buf));
                break;
              case GST_VIDEO_FORMAT_Y444:
              case GST_VIDEO_FORMAT_I420:
              case GST_VIDEO_FORMAT_YV12:
              case GST_VIDEO_FORMAT_Y42B:
              case GST_VIDEO_FORMAT_Y41B:{
                gint coffset, cw, ch;

                coffset =
                    gst_video_format_get_component_offset (eglglessink->format,
                    0, w, h);
                cw = gst_video_format_get_component_width (eglglessink->format,
                    0, w);
                ch = gst_video_format_get_component_height (eglglessink->format,
                    0, h);
                glActiveTexture (GL_TEXTURE0);
                glBindTexture (GL_TEXTURE_2D,
                    eglglessink->eglglesctx.texture[0]);
                glTexImage2D (GL_TEXTURE_2D, 0, GL_LUMINANCE, cw, ch, 0,
                    GL_LUMINANCE, GL_UNSIGNED_BYTE,
                    GST_BUFFER_DATA (buf) + coffset);
                coffset =
                    gst_video_format_get_component_offset (eglglessink->format,
                    1, w, h);
                cw = gst_video_format_get_component_width (eglglessink->format,
                    1, w);
                ch = gst_video_format_get_component_height (eglglessink->format,
                    1, h);
                glActiveTexture (GL_TEXTURE1);
                glBindTexture (GL_TEXTURE_2D,
                    eglglessink->eglglesctx.texture[1]);
                glTexImage2D (GL_TEXTURE_2D, 0, GL_LUMINANCE, cw, ch, 0,
                    GL_LUMINANCE, GL_UNSIGNED_BYTE,
                    GST_BUFFER_DATA (buf) + coffset);
                coffset =
                    gst_video_format_get_component_offset (eglglessink->format,
                    2, w, h);
                cw = gst_video_format_get_component_width (eglglessink->format,
                    2, w);
                ch = gst_video_format_get_component_height (eglglessink->format,
                    2, h);
                glActiveTexture (GL_TEXTURE2);
                glBindTexture (GL_TEXTURE_2D,
                    eglglessink->eglglesctx.texture[2]);
                glTexImage2D (GL_TEXTURE_2D, 0, GL_LUMINANCE, cw, ch, 0,
                    GL_LUMINANCE, GL_UNSIGNED_BYTE,
                    GST_BUFFER_DATA (buf) + coffset);
                break;
              }
              case GST_VIDEO_FORMAT_YUY2:
              case GST_VIDEO_FORMAT_YVYU:
              case GST_VIDEO_FORMAT_UYVY:
                glActiveTexture (GL_TEXTURE0);
                glBindTexture (GL_TEXTURE_2D,
                    eglglessink->eglglesctx.texture[0]);
                glTexImage2D (GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, w, h, 0,
                    GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE,
                    GST_BUFFER_DATA (buf));
                glActiveTexture (GL_TEXTURE1);
                glBindTexture (GL_TEXTURE_2D,
                    eglglessink->eglglesctx.texture[1]);
                glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, GST_ROUND_UP_2 (w) / 2,
                    h, 0, GL_RGBA, GL_UNSIGNED_BYTE, GST_BUFFER_DATA (buf));
                break;
              case GST_VIDEO_FORMAT_NV12:
              case GST_VIDEO_FORMAT_NV21:{
                gint coffset, cw, ch;

                coffset =
                    gst_video_format_get_component_offset (eglglessink->format,
                    0, w, h);
                cw = gst_video_format_get_component_width (eglglessink->format,
                    0, w);
                ch = gst_video_format_get_component_height (eglglessink->format,
                    0, h);
                glActiveTexture (GL_TEXTURE0);
                glBindTexture (GL_TEXTURE_2D,
                    eglglessink->eglglesctx.texture[0]);
                glTexImage2D (GL_TEXTURE_2D, 0, GL_LUMINANCE, cw, ch, 0,
                    GL_LUMINANCE, GL_UNSIGNED_BYTE,
                    GST_BUFFER_DATA (buf) + coffset);

                coffset =
                    gst_video_format_get_component_offset (eglglessink->format,
                    (eglglessink->format == GST_VIDEO_FORMAT_NV12 ? 1 : 2), w,
                    h);
                cw = gst_video_format_get_component_width (eglglessink->format,
                    1, w);
                ch = gst_video_format_get_component_height (eglglessink->format,
                    1, h);
                glActiveTexture (GL_TEXTURE1);
                glBindTexture (GL_TEXTURE_2D,
                    eglglessink->eglglesctx.texture[1]);
                glTexImage2D (GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, cw, ch, 0,
                    GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE,
                    GST_BUFFER_DATA (buf) + coffset);
                break;
              }
              default:
                g_assert_not_reached ();
                break;
            }
        }

        if (got_gl_error ("glTexImage2D"))
          goto HANDLE_ERROR;
      }

      /* If no one has set a display rectangle on us initialize
       * a sane default. According to the docs on the xOverlay
       * interface we are supposed to fill the overlay 100%. We
       * do this trying to take PAR/DAR into account unless the
       * calling party explicitly ask us not to by setting
       * force_aspect_ratio to FALSE.
       */
      if (gst_eglglessink_update_surface_dimensions (eglglessink) ||
          !eglglessink->display_region.w || !eglglessink->display_region.h) {
        GST_OBJECT_LOCK (eglglessink);
        if (!eglglessink->force_aspect_ratio) {
          eglglessink->display_region.x = 0;
          eglglessink->display_region.y = 0;
          eglglessink->display_region.w =
              eglglessink->eglglesctx.surface_width;
          eglglessink->display_region.h =
              eglglessink->eglglesctx.surface_height;
        } else {
          if (!gst_video_calculate_display_ratio (&dar_n, &dar_d, w, h,
                  eglglessink->par_n, eglglessink->par_d,
                  eglglessink->eglglesctx.pixel_aspect_ratio,
                  EGL_DISPLAY_SCALING)) {
            GST_WARNING_OBJECT (eglglessink, "Could not compute resulting DAR");
            frame.w = w;
            frame.h = h;
          } else {
            /* Find suitable matching new size acording to dar & par
             * rationale for prefering leaving the height untouched
             * comes from interlacing considerations.
             * XXX: Move this to gstutils?
             */
            if (h % dar_d == 0) {
              frame.w = gst_util_uint64_scale_int (h, dar_n, dar_d);
              frame.h = h;
            } else if (w % dar_n == 0) {
              frame.h = gst_util_uint64_scale_int (w, dar_d, dar_n);
              frame.w = w;
            } else {
              /* Neither width nor height can be precisely scaled.
               * Prefer to leave height untouched. See comment above.
               */
              frame.w = gst_util_uint64_scale_int (h, dar_n, dar_d);
              frame.h = h;
            }
          }

          surface.w = eglglessink->eglglesctx.surface_width;
          surface.h = eglglessink->eglglesctx.surface_height;
          gst_video_sink_center_rect (frame, surface,
              &eglglessink->display_region, TRUE);
        }
        GST_OBJECT_UNLOCK (eglglessink);
        glViewport (eglglessink->display_region.x,
            eglglessink->display_region.y,
            eglglessink->display_region.w, eglglessink->display_region.h);
      }

      glDrawElements (GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_SHORT, 0);
      if (got_gl_error ("glDrawElements"))
        goto HANDLE_ERROR;

      if ((eglSwapBuffers (eglglessink->eglglesctx.display,
                  eglglessink->eglglesctx.surface))
          == EGL_FALSE) {
        show_egl_error ("eglSwapBuffers");
        goto HANDLE_ERROR;
      }
  }

  GST_DEBUG_OBJECT (eglglessink, "Succesfully rendered 1 frame");
  return GST_FLOW_OK;

HANDLE_EGL_ERROR:
  GST_ERROR_OBJECT (eglglessink, "EGL call returned error %x", eglGetError ());
HANDLE_ERROR:
  GST_ERROR_OBJECT (eglglessink, "Rendering disabled for this frame");

  return GST_FLOW_ERROR;
}

static GstFlowReturn
gst_eglglessink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
  GstEglGlesSink *eglglessink;

  g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);

  eglglessink = GST_EGLGLESSINK (vsink);
  GST_DEBUG_OBJECT (eglglessink, "Got buffer: %p", buf);

  if (!eglglessink->have_window) {
    GST_ERROR_OBJECT (eglglessink, "I don't have a window to render to");
    return GST_FLOW_ERROR;
  }

  if (!eglglessink->have_surface) {
    GST_ERROR_OBJECT (eglglessink, "I don't have a surface to render to");
    return GST_FLOW_ERROR;
  }
#ifndef EGL_ANDROID_image_native_buffer
  GST_WARNING_OBJECT (eglglessink, "EGL_ANDROID_image_native_buffer not "
      "available");
#endif

  return gst_eglglessink_render_and_display (eglglessink, buf);
}

static GstCaps *
gst_eglglessink_getcaps (GstBaseSink * bsink)
{
  GstEglGlesSink *eglglessink;
  GstCaps *ret = NULL;

  eglglessink = GST_EGLGLESSINK (bsink);

  GST_OBJECT_LOCK (eglglessink);
  if (eglglessink->sinkcaps) {
    ret = gst_caps_ref (eglglessink->sinkcaps);
  } else {
    ret =
        gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SINK_PAD
            (bsink)));
  }
  GST_OBJECT_UNLOCK (eglglessink);

  return ret;
}

static gboolean
gst_eglglessink_setcaps (GstBaseSink * bsink, GstCaps * caps)
{
  GstEglGlesSink *eglglessink;
  gboolean ret = TRUE;
  gint width, height;
  int par_n, par_d;
  EGLNativeWindowType window;
  GstEglGlesImageFmt *format;

  eglglessink = GST_EGLGLESSINK (bsink);

  GST_DEBUG_OBJECT (eglglessink,
      "In setcaps. Possible caps %" GST_PTR_FORMAT ", setting caps %"
      GST_PTR_FORMAT, eglglessink->current_caps, caps);

  if (!(ret = gst_video_format_parse_caps (caps, &eglglessink->format, &width,
              &height))) {
    GST_ERROR_OBJECT (eglglessink, "Got weird and/or incomplete caps");
    goto HANDLE_ERROR;
  }

  if (!(ret = gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d))) {
    par_n = 1;
    par_d = 1;
    GST_WARNING_OBJECT (eglglessink,
        "Can't parse PAR from caps. Using default: 1");
  }

  format = gst_eglglessink_get_compat_format_from_caps (eglglessink, caps);
  if (!format) {
    GST_ERROR_OBJECT (eglglessink,
        "No supported and compatible EGL/GLES format found for given caps");
    goto HANDLE_ERROR;
  } else
    GST_INFO_OBJECT (eglglessink, "Selected compatible EGL/GLES format %d",
        format->fmt);

  eglglessink->selected_fmt = format;
  eglglessink->par_n = par_n;
  eglglessink->par_d = par_d;
  GST_VIDEO_SINK_WIDTH (eglglessink) = width;
  GST_VIDEO_SINK_HEIGHT (eglglessink) = height;

  if (eglglessink->current_caps) {
    GST_ERROR_OBJECT (eglglessink, "Caps were already set");
    if (gst_caps_can_intersect (caps, eglglessink->current_caps)) {
      GST_INFO_OBJECT (eglglessink, "Caps are compatible anyway");
      goto SUCCEED;
    }

    GST_DEBUG_OBJECT (eglglessink, "Caps are not compatible, reconfiguring");

    /* Cleanup */

    if (!gst_eglglessink_context_make_current (eglglessink, TRUE, TRUE))
      return FALSE;

    if (eglglessink->rendering_path == GST_EGLGLESSINK_RENDER_SLOW) {
      glUseProgram (0);

      if (eglglessink->have_vbo) {
        glDeleteBuffers (1, &eglglessink->eglglesctx.position_buffer);
        glDeleteBuffers (1, &eglglessink->eglglesctx.texpos_buffer);
        glDeleteBuffers (1, &eglglessink->eglglesctx.index_buffer);
        eglglessink->have_vbo = FALSE;
      }

      if (eglglessink->have_texture) {
        glDeleteTextures (eglglessink->eglglesctx.n_textures,
            eglglessink->eglglesctx.texture);
        eglglessink->have_texture = FALSE;
        eglglessink->eglglesctx.n_textures = 0;
      }

      if (eglglessink->eglglesctx.glslprogram) {
        glDetachShader (eglglessink->eglglesctx.glslprogram,
            eglglessink->eglglesctx.fragshader);
        glDetachShader (eglglessink->eglglesctx.glslprogram,
            eglglessink->eglglesctx.vertshader);
        glDeleteProgram (eglglessink->eglglesctx.glslprogram);
        glDeleteShader (eglglessink->eglglesctx.fragshader);
        glDeleteShader (eglglessink->eglglesctx.vertshader);
        eglglessink->eglglesctx.glslprogram = 0;
      }
    }

    if (!gst_eglglessink_context_make_current (eglglessink, FALSE, TRUE))
      return FALSE;

    if (eglglessink->eglglesctx.surface) {
      eglDestroySurface (eglglessink->eglglesctx.display,
          eglglessink->eglglesctx.surface);
      eglglessink->eglglesctx.surface = NULL;
      eglglessink->have_surface = FALSE;
    }

    if (eglglessink->eglglesctx.eglcontext) {
      eglDestroyContext (eglglessink->eglglesctx.display,
          eglglessink->eglglesctx.eglcontext);
      eglglessink->eglglesctx.eglcontext = NULL;
    }

    GST_OBJECT_LOCK (eglglessink);
    /* Reset display region
     * XXX: Should probably keep old ones if set_render_rect()
     * has been called.
     */
    eglglessink->display_region.w = 0;
    eglglessink->display_region.h = 0;
    GST_OBJECT_UNLOCK (eglglessink);

    gst_caps_unref (eglglessink->current_caps);
    eglglessink->current_caps = NULL;
  }

  if (!gst_eglglessink_choose_config (eglglessink)) {
    GST_ERROR_OBJECT (eglglessink, "Couldn't choose EGL config");
    goto HANDLE_ERROR;
  }

  eglglessink->current_caps = gst_caps_ref (caps);

  /* By now the application should have set a window
   * if it meant to do so
   */
  if (!eglglessink->have_window) {
    GST_INFO_OBJECT (eglglessink,
        "No window. Will attempt internal window creation");
    if (!(window = gst_eglglessink_create_window (eglglessink, width, height))) {
      GST_ERROR_OBJECT (eglglessink, "Internal window creation failed!");
      goto HANDLE_ERROR;
    }
    eglglessink->using_own_window = TRUE;
    gst_eglglessink_set_window_handle (GST_X_OVERLAY (eglglessink),
        (guintptr) window);
  }
  eglglessink->eglglesctx.used_window = eglglessink->eglglesctx.window;

  if (!eglglessink->have_surface) {
    if (!gst_eglglessink_init_egl_surface (eglglessink)) {
      GST_ERROR_OBJECT (eglglessink, "Couldn't init EGL surface from window");
      goto HANDLE_ERROR;
    }
  }

  if (!eglglessink->have_vbo) {
    if (!gst_eglglessink_setup_vbo (eglglessink, FALSE)) {
      GST_ERROR_OBJECT (eglglessink, "VBO setup failed");
      goto HANDLE_ERROR;
    }
  }

SUCCEED:
  GST_INFO_OBJECT (eglglessink, "Setcaps succeed");
  return TRUE;

HANDLE_ERROR:
  GST_ERROR_OBJECT (eglglessink, "Setcaps failed");
  return FALSE;
}

static void
gst_eglglessink_wipe_fmt (gpointer data)
{
  GstEglGlesImageFmt *format = data;
  gst_caps_unref (format->caps);
  g_free (format);
}

static gboolean
gst_eglglessink_open (GstEglGlesSink * eglglessink)
{
  if (!egl_init (eglglessink)) {
    return FALSE;
  }

  return TRUE;
}

static gboolean
gst_eglglessink_close (GstEglGlesSink * eglglessink)
{
  g_mutex_lock (eglglessink->flow_lock);
  if (eglglessink->eglglesctx.display) {
    eglTerminate (eglglessink->eglglesctx.display);
    eglglessink->eglglesctx.display = NULL;
  }

  eglglessink->selected_fmt = NULL;
  g_list_free_full (eglglessink->supported_fmts, gst_eglglessink_wipe_fmt);
  eglglessink->supported_fmts = NULL;
  gst_caps_unref (eglglessink->sinkcaps);
  eglglessink->sinkcaps = NULL;
  eglglessink->egl_started = FALSE;
  g_mutex_unlock (eglglessink->flow_lock);

  return TRUE;
}

static GstStateChangeReturn
gst_eglglessink_change_state (GstElement * element, GstStateChange transition)
{
  GstEglGlesSink *eglglessink;
  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

  eglglessink = GST_EGLGLESSINK (element);

  GST_ERROR_OBJECT (eglglessink, "Changing state %d -> %d", GST_STATE_TRANSITION_CURRENT (transition), GST_STATE_TRANSITION_NEXT (transition));

  switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
      if (!gst_eglglessink_open (eglglessink)) {
        ret = GST_STATE_CHANGE_FAILURE;
        goto done;
      }
      break;
    case GST_STATE_CHANGE_READY_TO_PAUSED:
      if (!gst_eglglessink_start (eglglessink)) {
        ret = GST_STATE_CHANGE_FAILURE;
        goto done;
      }
      break;
    default:
      break;
  }

  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
  if (ret == GST_STATE_CHANGE_FAILURE)
    return ret;

  switch (transition) {
    case GST_STATE_CHANGE_READY_TO_NULL:
      if (!gst_eglglessink_close (eglglessink)) {
        ret = GST_STATE_CHANGE_FAILURE;
        goto done;
      }
      break;
    case GST_STATE_CHANGE_PAUSED_TO_READY:
      if (!gst_eglglessink_stop (eglglessink)) {
        ret = GST_STATE_CHANGE_FAILURE;
        goto done;
      break;
    default:
      break;
  }

done:
  return ret;
}

static void
gst_eglglessink_finalize (GObject * object)
{
  G_OBJECT_CLASS (parent_class)->finalize (object);
}

static void
gst_eglglessink_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  GstEglGlesSink *eglglessink;

  g_return_if_fail (GST_IS_EGLGLESSINK (object));

  eglglessink = GST_EGLGLESSINK (object);

  switch (prop_id) {
    case PROP_CREATE_WINDOW:
      eglglessink->create_window = g_value_get_boolean (value);
      break;
    case PROP_FORCE_RENDERING_SLOW:
      eglglessink->force_rendering_slow = g_value_get_boolean (value);
      break;
    case PROP_FORCE_ASPECT_RATIO:
      eglglessink->force_aspect_ratio = g_value_get_boolean (value);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static void
gst_eglglessink_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  GstEglGlesSink *eglglessink;

  g_return_if_fail (GST_IS_EGLGLESSINK (object));

  eglglessink = GST_EGLGLESSINK (object);

  switch (prop_id) {
    case PROP_CREATE_WINDOW:
      g_value_set_boolean (value, eglglessink->create_window);
      break;
    case PROP_FORCE_RENDERING_SLOW:
      g_value_set_boolean (value, eglglessink->force_rendering_slow);
      break;
    case PROP_FORCE_ASPECT_RATIO:
      g_value_set_boolean (value, eglglessink->force_aspect_ratio);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static void
gst_eglglessink_base_init (gpointer gclass)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);

  gst_element_class_set_details_simple (element_class,
      "EGL/GLES vout Sink",
      "Sink/Video",
      "An EGL/GLES Video Output Sink Implementing the XOverlay interface",
      "Reynaldo H. Verdejo Pinochet <reynaldo@collabora.com>");

  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&gst_eglglessink_sink_template_factory));
}

/* initialize the eglglessink's class */
static void
gst_eglglessink_class_init (GstEglGlesSinkClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;
  GstBaseSinkClass *gstbasesink_class;
  GstVideoSinkClass *gstvideosink_class;

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;
  gstbasesink_class = (GstBaseSinkClass *) klass;
  gstvideosink_class = (GstVideoSinkClass *) klass;

  gobject_class->set_property = gst_eglglessink_set_property;
  gobject_class->get_property = gst_eglglessink_get_property;
  gobject_class->finalize = gst_eglglessink_finalize;

  gstelement_class->change_state = gst_eglglessink_change_state;

  gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_eglglessink_setcaps);
  gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_eglglessink_getcaps);
  gstbasesink_class->buffer_alloc = GST_DEBUG_FUNCPTR
      (gst_eglglessink_buffer_alloc);

  gstvideosink_class->show_frame =
      GST_DEBUG_FUNCPTR (gst_eglglessink_show_frame);

  g_object_class_install_property (gobject_class, PROP_CREATE_WINDOW,
      g_param_spec_boolean ("create-window", "Create Window",
          "If set to true, the sink will attempt to create it's own window to "
          "render to if none is provided. This is currently only supported "
          "when the sink is used under X11",
          TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  g_object_class_install_property (gobject_class, PROP_FORCE_RENDERING_SLOW,
      g_param_spec_boolean ("force-rendering-slow", "Force slow rendering path",
          "If set to true, the sink will use the slow rendering path even "
          "if needed EGL/GLES extensions for the fast rendering path are found "
          "to be available at runtime",
          FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
      g_param_spec_boolean ("force-aspect-ratio",
          "Respect aspect ratio when scaling",
          "If set to true, the sink will attempt to preserve the incoming "
          "frame's geometry while scaling, taking both the storage's and "
          "display's pixel aspect ratio into account",
          TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}


static void
gst_eglglessink_init (GstEglGlesSink * eglglessink,
    GstEglGlesSinkClass * gclass)
{
  /* Init defaults */

  /** Flags */
  eglglessink->have_window = FALSE;
  eglglessink->have_surface = FALSE;
  eglglessink->have_vbo = FALSE;
  eglglessink->have_texture = FALSE;
  eglglessink->egl_started = FALSE;
  eglglessink->using_own_window = FALSE;

  /** Props */
  eglglessink->create_window = TRUE;
  eglglessink->force_aspect_ratio = TRUE;
  eglglessink->force_rendering_slow = FALSE;

  eglglessink->par_n = 1;
  eglglessink->par_d = 1;
}

/* Interface initializations. Used here for initializing the XOverlay
 * Interface.
 */
static void
gst_eglglessink_init_interfaces (GType type)
{
  static const GInterfaceInfo implements_info = {
    (GInterfaceInitFunc) gst_eglglessink_implements_init, NULL, NULL
  };

  static const GInterfaceInfo xoverlay_info = {
    (GInterfaceInitFunc) gst_eglglessink_xoverlay_init, NULL, NULL
  };

  g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE,
      &implements_info);
  g_type_add_interface_static (type, GST_TYPE_X_OVERLAY, &xoverlay_info);

}

/* entry point to initialize the plug-in
 * initialize the plug-in itself
 * register the element factories and other features
 */
static gboolean
eglglessink_plugin_init (GstPlugin * plugin)
{
  /* debug category for fltering log messages */
  GST_DEBUG_CATEGORY_INIT (gst_eglglessink_debug, "eglglessink",
      0, "Simple EGL/GLES Sink");

  pthread_key_create (&context_key, detach_context);

  return gst_element_register (plugin, "eglglessink", GST_RANK_PRIMARY,
      GST_TYPE_EGLGLESSINK);
}

/* PACKAGE: this is usually set by autotools depending on some _INIT macro
 * in configure.ac and then written into and defined in config.h, but we can
 * just set it ourselves here in case someone doesn't use autotools to
 * compile this code. GST_PLUGIN_DEFINE needs PACKAGE to be defined.
 */
#ifndef PACKAGE
#define PACKAGE "EGL/GLES Sink"
#endif

#ifndef VERSION
#define VERSION "0.911"
#endif

/* gstreamer looks for this structure to register eglglessinks */
GST_PLUGIN_DEFINE2 (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    eglglessink,
    "EGL/GLES sink",
    eglglessink_plugin_init,
    VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")