| /* GStreamer |
| * Copyright (C) <2014> Wim Taymans <wim.taymans@gmail.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef __GST_VIDEO_DITHER_H__ |
| #define __GST_VIDEO_DITHER_H__ |
| |
| #include <gst/gst.h> |
| |
| G_BEGIN_DECLS |
| |
| /** |
| * GstVideoDitherMethod: |
| * @GST_VIDEO_DITHER_NONE: no dithering |
| * @GST_VIDEO_DITHER_VERTERR: propagate rounding errors downwards |
| * @GST_VIDEO_DITHER_FLOYD_STEINBERG: Dither with floyd-steinberg error diffusion |
| * @GST_VIDEO_DITHER_SIERRA_LITE: Dither with Sierra Lite error diffusion |
| * @GST_VIDEO_DITHER_BAYER: ordered dither using a bayer pattern |
| * |
| * Different dithering methods to use. |
| */ |
| typedef enum { |
| GST_VIDEO_DITHER_NONE, |
| GST_VIDEO_DITHER_VERTERR, |
| GST_VIDEO_DITHER_FLOYD_STEINBERG, |
| GST_VIDEO_DITHER_SIERRA_LITE, |
| GST_VIDEO_DITHER_BAYER, |
| } GstVideoDitherMethod; |
| |
| /** |
| * GstVideoDitherFlags: |
| * @GST_VIDEO_DITHER_FLAG_NONE: no flags |
| * @GST_VIDEO_DITHER_FLAG_INTERLACED: the input is interlaced |
| * @GST_VIDEO_DITHER_FLAG_QUANTIZE: quantize values in addition to adding dither. |
| * |
| * Extra flags that influence the result from gst_video_chroma_resample_new(). |
| */ |
| typedef enum { |
| GST_VIDEO_DITHER_FLAG_NONE = 0, |
| GST_VIDEO_DITHER_FLAG_INTERLACED = (1 << 0), |
| GST_VIDEO_DITHER_FLAG_QUANTIZE = (1 << 1), |
| } GstVideoDitherFlags; |
| |
| typedef struct _GstVideoDither GstVideoDither; |
| |
| /* circular dependency, need to include this after defining the enums */ |
| #include <gst/video/video-format.h> |
| |
| GST_EXPORT |
| GstVideoDither * gst_video_dither_new (GstVideoDitherMethod method, |
| GstVideoDitherFlags flags, |
| GstVideoFormat format, |
| guint quantizer[GST_VIDEO_MAX_COMPONENTS], |
| guint width); |
| |
| GST_EXPORT |
| void gst_video_dither_free (GstVideoDither *dither); |
| |
| GST_EXPORT |
| void gst_video_dither_line (GstVideoDither *dither, |
| gpointer line, guint x, guint y, guint width); |
| |
| G_END_DECLS |
| |
| #endif /* __GST_VIDEO_DITHER_H__ */ |
