ext/cog/gstcogdownsample.c - mtk-gst-plugins-bad - Git at Google

 /* GStreamer
  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
  * Copyright (C) <2003> David Schleef <ds@schleef.org>
  *
  * 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.
  */

 /*
  * This file was (probably) generated from
  * gstvideotemplate.c,v 1.18 2005/11/14 02:13:34 thomasvs Exp
  * and
  * $Id: make_filter,v 1.8 2004/04/19 22:51:57 ds Exp $
  */

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #include <gst/gst.h>
 #include <gst/base/gstbasetransform.h>
 #include <gst/video/video.h>
 #include <string.h>
 #include <cog/cog.h>
 #include <math.h>
 #include <cog/cogvirtframe.h>

 #define GST_TYPE_COGDOWNSAMPLE \
   (gst_cogdownsample_get_type())
 #define GST_COGDOWNSAMPLE(obj) \
   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COGDOWNSAMPLE,GstCogdownsample))
 #define GST_COGDOWNSAMPLE_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COGDOWNSAMPLE,GstCogdownsampleClass))
 #define GST_IS_COGDOWNSAMPLE(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COGDOWNSAMPLE))
 #define GST_IS_COGDOWNSAMPLE_CLASS(obj) \
   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COGDOWNSAMPLE))

 typedef struct _GstCogdownsample GstCogdownsample;
 typedef struct _GstCogdownsampleClass GstCogdownsampleClass;

 struct _GstCogdownsample
 {
   GstBaseTransform base_transform;

 };

 struct _GstCogdownsampleClass
 {
   GstBaseTransformClass parent_class;

 };

 GType gst_cogdownsample_get_type (void);

 enum
 {
   ARG_0
 };

 static void gst_cogdownsample_base_init (gpointer g_class);
 static void gst_cogdownsample_class_init (gpointer g_class,
     gpointer class_data);
 static void gst_cogdownsample_init (GTypeInstance * instance, gpointer g_class);

 static void gst_cogdownsample_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);
 static void gst_cogdownsample_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec);

 static GstCaps *gst_cogdownsample_transform_caps (GstBaseTransform *
     base_transform, GstPadDirection direction, GstCaps * caps);
 static GstFlowReturn gst_cogdownsample_transform (GstBaseTransform *
     base_transform, GstBuffer * inbuf, GstBuffer * outbuf);
 static gboolean gst_cogdownsample_get_unit_size (GstBaseTransform *
     base_transform, GstCaps * caps, guint * size);

 static GstStaticPadTemplate gst_cogdownsample_sink_template =
 GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV }"))
     );

 static GstStaticPadTemplate gst_cogdownsample_src_template =
 GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV }"))
     );

 GType
 gst_cogdownsample_get_type (void)
 {
   static GType compress_type = 0;

   if (!compress_type) {
     static const GTypeInfo compress_info = {
       sizeof (GstCogdownsampleClass),
       gst_cogdownsample_base_init,
       NULL,
       gst_cogdownsample_class_init,
       NULL,
       NULL,
       sizeof (GstCogdownsample),
       0,
       gst_cogdownsample_init,
     };

     compress_type = g_type_register_static (GST_TYPE_BASE_TRANSFORM,
         "GstCogdownsample", &compress_info, 0);
   }
   return compress_type;
 }


 static void
 gst_cogdownsample_base_init (gpointer g_class)
 {

   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

   gst_element_class_add_pad_template (element_class,
       gst_static_pad_template_get (&gst_cogdownsample_src_template));
   gst_element_class_add_pad_template (element_class,
       gst_static_pad_template_get (&gst_cogdownsample_sink_template));

   gst_element_class_set_metadata (element_class,
       "Scale down video by factor of 2", "Filter/Effect/Video",
       "Scales down video by a factor of 2", "David Schleef <ds@schleef.org>");
 }

 static void
 gst_cogdownsample_class_init (gpointer g_class, gpointer class_data)
 {
   GObjectClass *gobject_class;
   GstBaseTransformClass *base_transform_class;

   gobject_class = G_OBJECT_CLASS (g_class);
   base_transform_class = GST_BASE_TRANSFORM_CLASS (g_class);

   gobject_class->set_property = gst_cogdownsample_set_property;
   gobject_class->get_property = gst_cogdownsample_get_property;

   base_transform_class->transform = gst_cogdownsample_transform;
   base_transform_class->transform_caps = gst_cogdownsample_transform_caps;
   base_transform_class->get_unit_size = gst_cogdownsample_get_unit_size;
 }

 static void
 gst_cogdownsample_init (GTypeInstance * instance, gpointer g_class)
 {

   GST_DEBUG ("gst_cogdownsample_init");
 }

 static void
 gst_cogdownsample_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)
 {
   g_return_if_fail (GST_IS_COGDOWNSAMPLE (object));

   GST_DEBUG ("gst_cogdownsample_set_property");
   switch (prop_id) {
     default:
       break;
   }
 }

 static void
 gst_cogdownsample_get_property (GObject * object, guint prop_id, GValue * value,
     GParamSpec * pspec)
 {
   g_return_if_fail (GST_IS_COGDOWNSAMPLE (object));

   switch (prop_id) {
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }

 static void
 transform_value (GValue * dest, const GValue * src, GstPadDirection dir)
 {
   g_value_init (dest, G_VALUE_TYPE (src));

   if (G_VALUE_HOLDS_INT (src)) {
     int x;

     x = g_value_get_int (src);
     if (dir == GST_PAD_SINK) {
       g_value_set_int (dest, x / 2);
     } else {
       g_value_set_int (dest, x * 2);
     }
   } else if (GST_VALUE_HOLDS_INT_RANGE (src)) {
     int min, max;

     min = gst_value_get_int_range_min (src);
     max = gst_value_get_int_range_max (src);

     if (dir == GST_PAD_SINK) {
       min = (min + 1) / 2;
       if (max == G_MAXINT) {
         max = G_MAXINT / 2;
       } else {
         max = (max + 1) / 2;
       }
     } else {
       if (max > G_MAXINT / 2) {
         max = G_MAXINT;
       } else {
         max = max * 2;
       }
       if (min > G_MAXINT / 2) {
         min = G_MAXINT;
       } else {
         min = min * 2;
       }
     }
     gst_value_set_int_range (dest, min, max);
   } else {
     /* FIXME */
     g_warning ("case not handled");
     g_value_set_int (dest, 100);
   }
 }

 static GstCaps *
 gst_cogdownsample_transform_caps (GstBaseTransform * base_transform,
     GstPadDirection direction, GstCaps * caps)
 {
   int i;
   GstStructure *structure;
   GValue new_value = { 0 };
   const GValue *value;

   caps = gst_caps_copy (caps);

   for (i = 0; i < gst_caps_get_size (caps); i++) {
     structure = gst_caps_get_structure (caps, i);

     value = gst_structure_get_value (structure, "width");
     transform_value (&new_value, value, direction);
     gst_structure_set_value (structure, "width", &new_value);
     g_value_unset (&new_value);

     value = gst_structure_get_value (structure, "height");
     transform_value (&new_value, value, direction);
     gst_structure_set_value (structure, "height", &new_value);
     g_value_unset (&new_value);
   }

   return caps;
 }

 static gboolean
 gst_cogdownsample_get_unit_size (GstBaseTransform * base_transform,
     GstCaps * caps, guint * size)
 {
   int width, height;
   uint32_t format;

   gst_structure_get_fourcc (gst_caps_get_structure (caps, 0),
       "format", &format);
   gst_structure_get_int (gst_caps_get_structure (caps, 0), "width", &width);
   gst_structure_get_int (gst_caps_get_structure (caps, 0), "height", &height);

   switch (format) {
     case GST_MAKE_FOURCC ('I', '4', '2', '0'):
     case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
       *size = width * height * 3 / 2;
       break;
     case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
     case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
       *size = width * height * 2;
       break;
     case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
       *size = width * height * 4;
       break;
     default:
       g_assert_not_reached ();
   }

   return TRUE;
 }

 static GstFlowReturn
 gst_cogdownsample_transform (GstBaseTransform * base_transform,
     GstBuffer * inbuf, GstBuffer * outbuf)
 {
   CogFrame *outframe;
   int width, height;
   uint32_t format;
   CogFrame *frame;

   g_return_val_if_fail (GST_IS_COGDOWNSAMPLE (base_transform), GST_FLOW_ERROR);

   gst_structure_get_fourcc (gst_caps_get_structure (inbuf->caps, 0),
       "format", &format);
   gst_structure_get_int (gst_caps_get_structure (inbuf->caps, 0),
       "width", &width);
   gst_structure_get_int (gst_caps_get_structure (inbuf->caps, 0),
       "height", &height);

   switch (format) {
     case GST_MAKE_FOURCC ('I', '4', '2', '0'):
       frame = cog_frame_new_from_data_I420 (GST_BUFFER_DATA (inbuf),
           width, height);
       outframe = cog_frame_new_from_data_I420 (GST_BUFFER_DATA (outbuf),
           width / 2, height / 2);
       break;
     case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
       frame = cog_frame_new_from_data_YV12 (GST_BUFFER_DATA (inbuf),
           width, height);
       outframe = cog_frame_new_from_data_YV12 (GST_BUFFER_DATA (outbuf),
           width / 2, height / 2);
       break;
     case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
       frame = cog_frame_new_from_data_YUY2 (GST_BUFFER_DATA (inbuf),
           width, height);
       outframe = cog_frame_new_from_data_YUY2 (GST_BUFFER_DATA (outbuf),
           width / 2, height / 2);
       break;
     case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
       frame = cog_frame_new_from_data_UYVY (GST_BUFFER_DATA (inbuf),
           width, height);
       outframe = cog_frame_new_from_data_UYVY (GST_BUFFER_DATA (outbuf),
           width / 2, height / 2);
       break;
     case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
       frame = cog_frame_new_from_data_AYUV (GST_BUFFER_DATA (inbuf),
           width, height);
       outframe = cog_frame_new_from_data_AYUV (GST_BUFFER_DATA (outbuf),
           width / 2, height / 2);
       break;
     default:
       g_assert_not_reached ();
       return GST_FLOW_ERROR;
   }

   frame = cog_virt_frame_new_unpack (frame);
   frame = cog_virt_frame_new_horiz_downsample (frame, 3);
   frame = cog_virt_frame_new_vert_downsample (frame, 2);

   switch (format) {
     case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
       frame = cog_virt_frame_new_pack_YUY2 (frame);
       break;
     case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
       frame = cog_virt_frame_new_pack_UYVY (frame);
       break;
     case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
       frame = cog_virt_frame_new_pack_AYUV (frame);
       break;
     default:
       break;
   }

   cog_virt_frame_render (frame, outframe);
   cog_frame_unref (frame);
   cog_frame_unref (outframe);

   return GST_FLOW_OK;
 }
	/* GStreamer
	* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
	* Copyright (C) <2003> David Schleef <ds@schleef.org>
	*
	* 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.
	*/

	/*
	* This file was (probably) generated from
	* gstvideotemplate.c,v 1.18 2005/11/14 02:13:34 thomasvs Exp
	* and
	* $Id: make_filter,v 1.8 2004/04/19 22:51:57 ds Exp $
	*/

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include <gst/gst.h>
	#include <gst/base/gstbasetransform.h>
	#include <gst/video/video.h>
	#include <string.h>
	#include <cog/cog.h>
	#include <math.h>
	#include <cog/cogvirtframe.h>

	#define GST_TYPE_COGDOWNSAMPLE \
	(gst_cogdownsample_get_type())
	#define GST_COGDOWNSAMPLE(obj) \
	(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COGDOWNSAMPLE,GstCogdownsample))
	#define GST_COGDOWNSAMPLE_CLASS(klass) \
	(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COGDOWNSAMPLE,GstCogdownsampleClass))
	#define GST_IS_COGDOWNSAMPLE(obj) \
	(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COGDOWNSAMPLE))
	#define GST_IS_COGDOWNSAMPLE_CLASS(obj) \
	(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COGDOWNSAMPLE))

	typedef struct _GstCogdownsample GstCogdownsample;
	typedef struct _GstCogdownsampleClass GstCogdownsampleClass;

	struct _GstCogdownsample
	{
	GstBaseTransform base_transform;

	};

	struct _GstCogdownsampleClass
	{
	GstBaseTransformClass parent_class;

	};

	GType gst_cogdownsample_get_type (void);

	enum
	{
	ARG_0
	};

	static void gst_cogdownsample_base_init (gpointer g_class);
	static void gst_cogdownsample_class_init (gpointer g_class,
	gpointer class_data);
	static void gst_cogdownsample_init (GTypeInstance * instance, gpointer g_class);

	static void gst_cogdownsample_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec);
	static void gst_cogdownsample_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec);

	static GstCaps gst_cogdownsample_transform_caps (GstBaseTransform
	base_transform, GstPadDirection direction, GstCaps * caps);
	static GstFlowReturn gst_cogdownsample_transform (GstBaseTransform *
	base_transform, GstBuffer * inbuf, GstBuffer * outbuf);
	static gboolean gst_cogdownsample_get_unit_size (GstBaseTransform *
	base_transform, GstCaps * caps, guint * size);

	static GstStaticPadTemplate gst_cogdownsample_sink_template =
	GST_STATIC_PAD_TEMPLATE ("sink",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV }"))
	);

	static GstStaticPadTemplate gst_cogdownsample_src_template =
	GST_STATIC_PAD_TEMPLATE ("src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV }"))
	);

	GType
	gst_cogdownsample_get_type (void)
	{
	static GType compress_type = 0;

	if (!compress_type) {
	static const GTypeInfo compress_info = {
	sizeof (GstCogdownsampleClass),
	gst_cogdownsample_base_init,
	NULL,
	gst_cogdownsample_class_init,
	NULL,
	NULL,
	sizeof (GstCogdownsample),
	0,
	gst_cogdownsample_init,
	};

	compress_type = g_type_register_static (GST_TYPE_BASE_TRANSFORM,
	"GstCogdownsample", &compress_info, 0);
	}
	return compress_type;
	}


	static void
	gst_cogdownsample_base_init (gpointer g_class)
	{

	GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

	gst_element_class_add_pad_template (element_class,
	gst_static_pad_template_get (&gst_cogdownsample_src_template));
	gst_element_class_add_pad_template (element_class,
	gst_static_pad_template_get (&gst_cogdownsample_sink_template));

	gst_element_class_set_metadata (element_class,
	"Scale down video by factor of 2", "Filter/Effect/Video",
	"Scales down video by a factor of 2", "David Schleef <ds@schleef.org>");
	}

	static void
	gst_cogdownsample_class_init (gpointer g_class, gpointer class_data)
	{
	GObjectClass *gobject_class;
	GstBaseTransformClass *base_transform_class;

	gobject_class = G_OBJECT_CLASS (g_class);
	base_transform_class = GST_BASE_TRANSFORM_CLASS (g_class);

	gobject_class->set_property = gst_cogdownsample_set_property;
	gobject_class->get_property = gst_cogdownsample_get_property;

	base_transform_class->transform = gst_cogdownsample_transform;
	base_transform_class->transform_caps = gst_cogdownsample_transform_caps;
	base_transform_class->get_unit_size = gst_cogdownsample_get_unit_size;
	}

	static void
	gst_cogdownsample_init (GTypeInstance * instance, gpointer g_class)
	{

	GST_DEBUG ("gst_cogdownsample_init");
	}

	static void
	gst_cogdownsample_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec)
	{
	g_return_if_fail (GST_IS_COGDOWNSAMPLE (object));

	GST_DEBUG ("gst_cogdownsample_set_property");
	switch (prop_id) {
	default:
	break;
	}
	}

	static void
	gst_cogdownsample_get_property (GObject * object, guint prop_id, GValue * value,
	GParamSpec * pspec)
	{
	g_return_if_fail (GST_IS_COGDOWNSAMPLE (object));

	switch (prop_id) {
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}

	static void
	transform_value (GValue * dest, const GValue * src, GstPadDirection dir)
	{
	g_value_init (dest, G_VALUE_TYPE (src));

	if (G_VALUE_HOLDS_INT (src)) {
	int x;

	x = g_value_get_int (src);
	if (dir == GST_PAD_SINK) {
	g_value_set_int (dest, x / 2);
	} else {
	g_value_set_int (dest, x * 2);
	}
	} else if (GST_VALUE_HOLDS_INT_RANGE (src)) {
	int min, max;

	min = gst_value_get_int_range_min (src);
	max = gst_value_get_int_range_max (src);

	if (dir == GST_PAD_SINK) {
	min = (min + 1) / 2;
	if (max == G_MAXINT) {
	max = G_MAXINT / 2;
	} else {
	max = (max + 1) / 2;
	}
	} else {
	if (max > G_MAXINT / 2) {
	max = G_MAXINT;
	} else {
	max = max * 2;
	}
	if (min > G_MAXINT / 2) {
	min = G_MAXINT;
	} else {
	min = min * 2;
	}
	}
	gst_value_set_int_range (dest, min, max);
	} else {
	/* FIXME */
	g_warning ("case not handled");
	g_value_set_int (dest, 100);
	}
	}

	static GstCaps *
	gst_cogdownsample_transform_caps (GstBaseTransform * base_transform,
	GstPadDirection direction, GstCaps * caps)
	{
	int i;
	GstStructure *structure;
	GValue new_value = { 0 };
	const GValue *value;

	caps = gst_caps_copy (caps);

	for (i = 0; i < gst_caps_get_size (caps); i++) {
	structure = gst_caps_get_structure (caps, i);

	value = gst_structure_get_value (structure, "width");
	transform_value (&new_value, value, direction);
	gst_structure_set_value (structure, "width", &new_value);
	g_value_unset (&new_value);

	value = gst_structure_get_value (structure, "height");
	transform_value (&new_value, value, direction);
	gst_structure_set_value (structure, "height", &new_value);
	g_value_unset (&new_value);
	}

	return caps;
	}

	static gboolean
	gst_cogdownsample_get_unit_size (GstBaseTransform * base_transform,
	GstCaps * caps, guint * size)
	{
	int width, height;
	uint32_t format;

	gst_structure_get_fourcc (gst_caps_get_structure (caps, 0),
	"format", &format);
	gst_structure_get_int (gst_caps_get_structure (caps, 0), "width", &width);
	gst_structure_get_int (gst_caps_get_structure (caps, 0), "height", &height);

	switch (format) {
	case GST_MAKE_FOURCC ('I', '4', '2', '0'):
	case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
	size = width height * 3 / 2;
	break;
	case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
	case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
	size = width height * 2;
	break;
	case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
	size = width height * 4;
	break;
	default:
	g_assert_not_reached ();
	}

	return TRUE;
	}

	static GstFlowReturn
	gst_cogdownsample_transform (GstBaseTransform * base_transform,
	GstBuffer * inbuf, GstBuffer * outbuf)
	{
	CogFrame *outframe;
	int width, height;
	uint32_t format;
	CogFrame *frame;

	g_return_val_if_fail (GST_IS_COGDOWNSAMPLE (base_transform), GST_FLOW_ERROR);

	gst_structure_get_fourcc (gst_caps_get_structure (inbuf->caps, 0),
	"format", &format);
	gst_structure_get_int (gst_caps_get_structure (inbuf->caps, 0),
	"width", &width);
	gst_structure_get_int (gst_caps_get_structure (inbuf->caps, 0),
	"height", &height);

	switch (format) {
	case GST_MAKE_FOURCC ('I', '4', '2', '0'):
	frame = cog_frame_new_from_data_I420 (GST_BUFFER_DATA (inbuf),
	width, height);
	outframe = cog_frame_new_from_data_I420 (GST_BUFFER_DATA (outbuf),
	width / 2, height / 2);
	break;
	case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
	frame = cog_frame_new_from_data_YV12 (GST_BUFFER_DATA (inbuf),
	width, height);
	outframe = cog_frame_new_from_data_YV12 (GST_BUFFER_DATA (outbuf),
	width / 2, height / 2);
	break;
	case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
	frame = cog_frame_new_from_data_YUY2 (GST_BUFFER_DATA (inbuf),
	width, height);
	outframe = cog_frame_new_from_data_YUY2 (GST_BUFFER_DATA (outbuf),
	width / 2, height / 2);
	break;
	case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
	frame = cog_frame_new_from_data_UYVY (GST_BUFFER_DATA (inbuf),
	width, height);
	outframe = cog_frame_new_from_data_UYVY (GST_BUFFER_DATA (outbuf),
	width / 2, height / 2);
	break;
	case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
	frame = cog_frame_new_from_data_AYUV (GST_BUFFER_DATA (inbuf),
	width, height);
	outframe = cog_frame_new_from_data_AYUV (GST_BUFFER_DATA (outbuf),
	width / 2, height / 2);
	break;
	default:
	g_assert_not_reached ();
	return GST_FLOW_ERROR;
	}

	frame = cog_virt_frame_new_unpack (frame);
	frame = cog_virt_frame_new_horiz_downsample (frame, 3);
	frame = cog_virt_frame_new_vert_downsample (frame, 2);

	switch (format) {
	case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
	frame = cog_virt_frame_new_pack_YUY2 (frame);
	break;
	case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
	frame = cog_virt_frame_new_pack_UYVY (frame);
	break;
	case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
	frame = cog_virt_frame_new_pack_AYUV (frame);
	break;
	default:
	break;
	}

	cog_virt_frame_render (frame, outframe);
	cog_frame_unref (frame);
	cog_frame_unref (outframe);

	return GST_FLOW_OK;
	}