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 \ 33 (gst_alpha_get_type()) 34 #define GST_ALPHA(obj) \ 35 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALPHA,GstAlpha)) 36 #define GST_ALPHA_CLASS(klass) \ 37 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALPHA,GstAlphaClass)) 38 #define GST_IS_ALPHA(obj) \ 39 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALPHA)) 40 #define GST_IS_ALPHA_CLASS(klass) \ 41 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALPHA)) 42 43 typedef struct _GstAlpha GstAlpha; 44 typedef struct _GstAlphaClass GstAlphaClass; 45 46 /** 47 * GstAlphaMethod: 48 * @ALPHA_METHOD_SET: Set/adjust alpha channel 49 * @ALPHA_METHOD_GREEN: Chroma Key green 50 * @ALPHA_METHOD_BLUE: Chroma Key blue 51 * @ALPHA_METHOD_CUSTOM: Chroma Key on target_r/g/b 52 */ 53 typedef enum 54 { 55 ALPHA_METHOD_SET, 56 ALPHA_METHOD_GREEN, 57 ALPHA_METHOD_BLUE, 58 ALPHA_METHOD_CUSTOM, 59 } 60 GstAlphaMethod; 61 62 GST_DEBUG_CATEGORY_STATIC (gst_alpha_debug); 63 #define GST_CAT_DEFAULT gst_alpha_debug 64 65 struct _GstAlpha 66 { 67 GstVideoFilter parent; 68 69 /* <private> */ 70 71 /* caps */ 72 GMutex lock; 73 74 gboolean in_sdtv, out_sdtv; 75 76 /* properties */ 77 gdouble alpha; 78 79 guint target_r; 80 guint target_g; 81 guint target_b; 82 83 GstAlphaMethod method; 84 85 gfloat angle; 86 gfloat noise_level; 87 guint black_sensitivity; 88 guint white_sensitivity; 89 90 gboolean prefer_passthrough; 91 92 /* processing function */ 93 void (*process) (const GstVideoFrame *in_frame, GstVideoFrame *out_frame, GstAlpha *alpha); 94 95 /* precalculated values for chroma keying */ 96 gint8 cb, cr; 97 gint8 kg; 98 guint8 accept_angle_tg; 99 guint8 accept_angle_ctg; 100 guint8 one_over_kc; 101 guint8 kfgy_scale; 102 guint noise_level2; 103 }; 104 105 struct _GstAlphaClass 106 { 107 GstVideoFilterClass parent_class; 108 }; 109 110 GType gst_alpha_get_type (void); 111 112 G_END_DECLS 113 114 #endif /* __GST_ALPHA_H__ */ 115