1 /* GStreamer 2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public 15 * License along with this library; if not, write to the 16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef __GST_VIDEO_SCALE_H__ 21 #define __GST_VIDEO_SCALE_H__ 22 23 #include <gst/gst.h> 24 #include <gst/video/video.h> 25 #include <gst/video/gstvideofilter.h> 26 27 G_BEGIN_DECLS 28 29 #define GST_TYPE_VIDEO_SCALE (gst_video_scale_get_type()) 30 #define GST_VIDEO_SCALE_CAST(obj) ((GstVideoScale *)(obj)) 31 G_DECLARE_FINAL_TYPE (GstVideoScale, gst_video_scale, GST, VIDEO_SCALE, 32 GstVideoFilter) 33 34 35 /** 36 * GstVideoScaleMethod: 37 * @GST_VIDEO_SCALE_NEAREST: use nearest neighbour scaling (fast and ugly) 38 * @GST_VIDEO_SCALE_BILINEAR: use 2-tap bilinear scaling (slower but prettier). 39 * @GST_VIDEO_SCALE_4TAP: use a 4-tap sinc filter for scaling (slow). 40 * @GST_VIDEO_SCALE_LANCZOS: use a multitap Lanczos filter for scaling (slow). 41 * @GST_VIDEO_SCALE_BILINEAR2: use a multitap bilinear filter 42 * @GST_VIDEO_SCALE_SINC: use a multitap sinc filter 43 * @GST_VIDEO_SCALE_HERMITE: use a multitap bicubic Hermite filter 44 * @GST_VIDEO_SCALE_SPLINE: use a multitap bicubic spline filter 45 * @GST_VIDEO_SCALE_CATROM: use a multitap bicubic Catmull-Rom filter 46 * @GST_VIDEO_SCALE_MITCHELL: use a multitap bicubic Mitchell filter 47 * 48 * The videoscale method to use. 49 */ 50 typedef enum { 51 GST_VIDEO_SCALE_NEAREST, 52 GST_VIDEO_SCALE_BILINEAR, 53 GST_VIDEO_SCALE_4TAP, 54 GST_VIDEO_SCALE_LANCZOS, 55 56 GST_VIDEO_SCALE_BILINEAR2, 57 GST_VIDEO_SCALE_SINC, 58 GST_VIDEO_SCALE_HERMITE, 59 GST_VIDEO_SCALE_SPLINE, 60 GST_VIDEO_SCALE_CATROM, 61 GST_VIDEO_SCALE_MITCHELL 62 } GstVideoScaleMethod; 63 64 /** 65 * GstVideoScale: 66 * 67 * Opaque data structure 68 */ 69 struct _GstVideoScale { 70 GstVideoFilter element; 71 72 /* properties */ 73 GstVideoScaleMethod method; 74 gboolean add_borders; 75 double sharpness; 76 double sharpen; 77 gboolean dither; 78 int submethod; 79 double envelope; 80 gboolean gamma_decode; 81 gint n_threads; 82 83 GstVideoConverter *convert; 84 85 gint borders_h; 86 gint borders_w; 87 }; 88 89 GST_ELEMENT_REGISTER_DECLARE (videoscale); 90 91 G_END_DECLS 92 93 #endif /* __GST_VIDEO_SCALE_H__ */ 94