1 /* GStreamer 2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> 3 * Copyright (C) <2007> Wim Taymans <wim.taymans@collabora.co.uk> 4 * Copyright (C) <2007> Edward Hervey <edward.hervey@collabora.co.uk> 5 * Copyright (C) <2007> Jan Schmidt <thaytan@noraisin.net> 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public 18 * License along with this library; if not, write to the 19 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 */ 22 23 #ifndef __GST_ALPHA_H__ 24 #define __GST_ALPHA_H__ 25 26 #include <gst/gst.h> 27 #include <gst/video/video.h> 28 #include <gst/video/gstvideofilter.h> 29 30 G_BEGIN_DECLS 31 32 #define GST_TYPE_ALPHA (gst_alpha_get_type ()) 33 34 G_DECLARE_FINAL_TYPE (GstAlpha, gst_alpha, GST, ALPHA, GstVideoFilter) 35 36 /** 37 * GstAlphaMethod: 38 * @ALPHA_METHOD_SET: Set/adjust alpha channel 39 * @ALPHA_METHOD_GREEN: Chroma Key green 40 * @ALPHA_METHOD_BLUE: Chroma Key blue 41 * @ALPHA_METHOD_CUSTOM: Chroma Key on target_r/g/b 42 */ 43 typedef enum 44 { 45 ALPHA_METHOD_SET, 46 ALPHA_METHOD_GREEN, 47 ALPHA_METHOD_BLUE, 48 ALPHA_METHOD_CUSTOM, 49 } 50 GstAlphaMethod; 51 52 GST_DEBUG_CATEGORY_STATIC (gst_alpha_debug); 53 #define GST_CAT_DEFAULT gst_alpha_debug 54 55 struct _GstAlpha 56 { 57 GstVideoFilter parent; 58 59 /* <private> */ 60 61 /* caps */ 62 GMutex lock; 63 64 gboolean in_sdtv, out_sdtv; 65 66 /* properties */ 67 gdouble alpha; 68 69 guint target_r; 70 guint target_g; 71 guint target_b; 72 73 GstAlphaMethod method; 74 75 gfloat angle; 76 gfloat noise_level; 77 guint black_sensitivity; 78 guint white_sensitivity; 79 80 gboolean prefer_passthrough; 81 82 /* processing function */ 83 void (*process) (const GstVideoFrame *in_frame, GstVideoFrame *out_frame, GstAlpha *alpha); 84 85 /* precalculated values for chroma keying */ 86 gint8 cb, cr; 87 gint8 kg; 88 guint8 accept_angle_tg; 89 guint8 accept_angle_ctg; 90 guint8 one_over_kc; 91 guint8 kfgy_scale; 92 guint noise_level2; 93 }; 94 95 GST_ELEMENT_REGISTER_DECLARE (alpha); 96 97 G_END_DECLS 98 99 #endif /* __GST_ALPHA_H__ */ 100