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99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2007> Wim Taymans <wim.taymans@collabora.co.uk>
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* Copyright (C) <2007> Edward Hervey <edward.hervey@collabora.co.uk>
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* Copyright (C) <2007> Jan Schmidt <thaytan@noraisin.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_ALPHA_H__
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#define __GST_ALPHA_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/video/gstvideofilter.h>
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G_BEGIN_DECLS
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#define GST_TYPE_ALPHA (gst_alpha_get_type ())
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G_DECLARE_FINAL_TYPE (GstAlpha, gst_alpha, GST, ALPHA, GstVideoFilter)
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/**
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* GstAlphaMethod:
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* @ALPHA_METHOD_SET: Set/adjust alpha channel
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* @ALPHA_METHOD_GREEN: Chroma Key green
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* @ALPHA_METHOD_BLUE: Chroma Key blue
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* @ALPHA_METHOD_CUSTOM: Chroma Key on target_r/g/b
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*/
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typedef enum
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{
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ALPHA_METHOD_SET,
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ALPHA_METHOD_GREEN,
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ALPHA_METHOD_BLUE,
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ALPHA_METHOD_CUSTOM,
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}
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GstAlphaMethod;
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GST_DEBUG_CATEGORY_STATIC (gst_alpha_debug);
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#define GST_CAT_DEFAULT gst_alpha_debug
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struct _GstAlpha
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{
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GstVideoFilter parent;
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/* <private> */
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/* caps */
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GMutex lock;
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gboolean in_sdtv, out_sdtv;
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/* properties */
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gdouble alpha;
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guint target_r;
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guint target_g;
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guint target_b;
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GstAlphaMethod method;
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gfloat angle;
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gfloat noise_level;
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guint black_sensitivity;
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guint white_sensitivity;
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gboolean prefer_passthrough;
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/* processing function */
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void (*process) (const GstVideoFrame *in_frame, GstVideoFrame *out_frame, GstAlpha *alpha);
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/* precalculated values for chroma keying */
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gint8 cb, cr;
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gint8 kg;
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guint8 accept_angle_tg;
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guint8 accept_angle_ctg;
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guint8 one_over_kc;
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guint8 kfgy_scale;
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guint noise_level2;
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};
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GST_ELEMENT_REGISTER_DECLARE (alpha);
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G_END_DECLS
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#endif /* __GST_ALPHA_H__ */
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