/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 * Copyright (C) <2003> David Schleef <ds@schleef.org>
 * Copyright (C) 2003 Arwed v. Merkatz <v.merkatz@gmx.net>
 * Copyright (C) 2006 Mark Nauwelaerts <manauw@skynet.be>
 * Copyright (C) 2010 United States Government, Joshua M. Doe <oss@nvl.army.mil>
 *
 * 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.
 */


#ifndef __GST_VIDEO_LEVELS_H__
#define __GST_VIDEO_LEVELS_H__

#include <gst/video/gstvideofilter.h>
#include <gst/video/video.h>

G_BEGIN_DECLS

#define GST_TYPE_VIDEOLEVELS \
  (gst_videolevels_get_type())
#define GST_VIDEOLEVELS(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEOLEVELS,GstVideoLevels))
#define GST_VIDEOLEVELS_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEOLEVELS,GstVideoLevelsClass))
#define GST_IS_VIDEOLEVELS(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEOLEVELS))
#define GST_IS_VIDEOLEVELS_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEOLEVELS))

typedef struct _GstVideoLevels GstVideoLevels;
typedef struct _GstVideoLevelsClass GstVideoLevelsClass;

/**
* GstVideoLevelsAuto:
* @GST_VIDEOLEVELS_AUTO_OFF: don't perform auto adjustment
* @GST_VIDEOLEVELS_AUTO_SINGLE: perform auto adjustment once
* @GST_VIDEOLEVELS_AUTO_CONTINUOUS: perform auto adjustment continuously (defined by "interval" property)
*
* Vertical alignment of the text.
*/
typedef enum {
  GST_VIDEOLEVELS_AUTO_OFF,
  GST_VIDEOLEVELS_AUTO_SINGLE,
  GST_VIDEOLEVELS_AUTO_CONTINUOUS
} GstVideoLevelsAuto;

/**
* GstVideoLevels:
* @element: the parent element.
*
*
* The opaque GstVideoLevels data structure.
*/
struct _GstVideoLevels
{
  GstVideoFilter element;

  /* format */
  gint bpp_in;
  GstVideoInfo info_in;
  GstVideoInfo info_out;

  /* properties */
  gdouble lower_input;
  gdouble upper_input;
  gdouble lower_output;
  gdouble upper_output;

  /* tables */
  gpointer lookup_table;

  GstVideoLevelsAuto auto_adjust;
  guint64 interval;
  gfloat lower_pix_sat;
  gfloat upper_pix_sat;
  gint nbins;
  gint * histogram;

  guint64 last_auto_timestamp;
};

struct _GstVideoLevelsClass
{
  GstVideoFilterClass parent_class;
};

GType gst_videolevels_get_type(void);

G_END_DECLS

#endif /* __GST_VIDEO_LEVELS_H__ */