1 /* GStreamer 2 * Copyright (C) <2014> Wim Taymans <wim.taymans@gmail.com> 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_DITHER_H__ 21 #define __GST_VIDEO_DITHER_H__ 22 23 #include <gst/gst.h> 24 #include <gst/video/video-prelude.h> 25 26 G_BEGIN_DECLS 27 28 /** 29 * GstVideoDitherMethod: 30 * @GST_VIDEO_DITHER_NONE: no dithering 31 * @GST_VIDEO_DITHER_VERTERR: propagate rounding errors downwards 32 * @GST_VIDEO_DITHER_FLOYD_STEINBERG: Dither with floyd-steinberg error diffusion 33 * @GST_VIDEO_DITHER_SIERRA_LITE: Dither with Sierra Lite error diffusion 34 * @GST_VIDEO_DITHER_BAYER: ordered dither using a bayer pattern 35 * 36 * Different dithering methods to use. 37 */ 38 typedef enum { 39 GST_VIDEO_DITHER_NONE, 40 GST_VIDEO_DITHER_VERTERR, 41 GST_VIDEO_DITHER_FLOYD_STEINBERG, 42 GST_VIDEO_DITHER_SIERRA_LITE, 43 GST_VIDEO_DITHER_BAYER, 44 } GstVideoDitherMethod; 45 46 /** 47 * GstVideoDitherFlags: 48 * @GST_VIDEO_DITHER_FLAG_NONE: no flags 49 * @GST_VIDEO_DITHER_FLAG_INTERLACED: the input is interlaced 50 * @GST_VIDEO_DITHER_FLAG_QUANTIZE: quantize values in addition to adding dither. 51 * 52 * Extra flags that influence the result from gst_video_chroma_resample_new(). 53 */ 54 typedef enum { 55 GST_VIDEO_DITHER_FLAG_NONE = 0, 56 GST_VIDEO_DITHER_FLAG_INTERLACED = (1 << 0), 57 GST_VIDEO_DITHER_FLAG_QUANTIZE = (1 << 1), 58 } GstVideoDitherFlags; 59 60 typedef struct _GstVideoDither GstVideoDither; 61 62 /* circular dependency, need to include this after defining the enums */ 63 #include <gst/video/video-format.h> 64 65 GST_VIDEO_API 66 GstVideoDither * gst_video_dither_new (GstVideoDitherMethod method, 67 GstVideoDitherFlags flags, 68 GstVideoFormat format, 69 guint quantizer[GST_VIDEO_MAX_COMPONENTS], 70 guint width); 71 72 GST_VIDEO_API 73 void gst_video_dither_free (GstVideoDither *dither); 74 75 GST_VIDEO_API 76 void gst_video_dither_line (GstVideoDither *dither, 77 gpointer line, guint x, guint y, guint width); 78 79 G_END_DECLS 80 81 #endif /* __GST_VIDEO_DITHER_H__ */ 82