gstreamer/gst/alpha/gstalpha.h

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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., 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 ())
G_DECLARE_FINAL_TYPE (GstAlpha, gst_alpha, GST, ALPHA, GstVideoFilter)
/**
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* GstAlphaMethod:
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* @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 */
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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;
};
GST_ELEMENT_REGISTER_DECLARE (alpha);
G_END_DECLS
#endif /* __GST_ALPHA_H__ */