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/* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_ALPHA_H__
#define __GST_ALPHA_H__
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/gstvideofilter.h>
#include <gst/controller/gstcontroller.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 */
GStaticMutex lock;
GstVideoFormat in_format, out_format;
gint width, height;
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 guint8 *src, guint8 *dest, gint width, gint height, 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__ */
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