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- /* 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>
- GstVideoDither * gst_video_dither_new (GstVideoDitherMethod method,
- GstVideoDitherFlags flags,
- GstVideoFormat format,
- guint quantizer[GST_VIDEO_MAX_COMPONENTS],
- guint width);
- void gst_video_dither_free (GstVideoDither *dither);
- void gst_video_dither_line (GstVideoDither *dither,
- gpointer line, guint x, guint y, guint width);
- G_END_DECLS
- #endif /* __GST_VIDEO_DITHER_H__ */
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