/* GStreamer

 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>

 * Copyright (C) <2007> Wim Taymans <wim.taymans@collabora.co.uk>

 * Copyright (C) <2007> Edward Hervey <edward.hervey@collabora.co.uk>

 * Copyright (C) <2007> Jan Schmidt <thaytan@noraisin.net>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifndef __GST_ALPHA_H__

#define __GST_ALPHA_H__

#include <gst/gst.h>

#include <gst/video/video.h>

#include <gst/video/gstvideofilter.h>

G_BEGIN_DECLS

#define GST_TYPE_ALPHA \

  (gst_alpha_get_type())

#define GST_ALPHA(obj) \

  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALPHA,GstAlpha))

#define GST_ALPHA_CLASS(klass) \

  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALPHA,GstAlphaClass))

#define GST_IS_ALPHA(obj) \

  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALPHA))

#define GST_IS_ALPHA_CLASS(klass) \

  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALPHA))

typedef struct _GstAlpha GstAlpha;

typedef struct _GstAlphaClass GstAlphaClass;

/** 

 * GstAlphaMethod:

 * @ALPHA_METHOD_SET: Set/adjust alpha channel

 * @ALPHA_METHOD_GREEN: Chroma Key green

 * @ALPHA_METHOD_BLUE: Chroma Key blue

 * @ALPHA_METHOD_CUSTOM: Chroma Key on target_r/g/b

 */

typedef enum

{

  ALPHA_METHOD_SET,

  ALPHA_METHOD_GREEN,

  ALPHA_METHOD_BLUE,

  ALPHA_METHOD_CUSTOM,

}

GstAlphaMethod;

GST_DEBUG_CATEGORY_STATIC (gst_alpha_debug);

#define GST_CAT_DEFAULT gst_alpha_debug

struct _GstAlpha

{

  GstVideoFilter parent;

  /* <private> */

  /* caps */

  GMutex lock;

  gboolean in_sdtv, out_sdtv;

  /* properties */

  gdouble alpha;

  guint target_r;

  guint target_g;

  guint target_b;

  GstAlphaMethod method;

  gfloat angle;

  gfloat noise_level;

  guint black_sensitivity;

  guint white_sensitivity;

  gboolean prefer_passthrough;

  /* processing function */

  void (*process) (const GstVideoFrame *in_frame, GstVideoFrame *out_frame, GstAlpha *alpha);

  /* precalculated values for chroma keying */

  gint8 cb, cr;

  gint8 kg;

  guint8 accept_angle_tg;

  guint8 accept_angle_ctg;

  guint8 one_over_kc;

  guint8 kfgy_scale;

  guint noise_level2;

};

struct _GstAlphaClass

{

  GstVideoFilterClass parent_class;

};

GType gst_alpha_get_type (void);

G_END_DECLS

#endif /* __GST_ALPHA_H__ */