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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>
#include <gst/video/video-prelude.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_VIDEO_API
GstVideoDither * gst_video_dither_new (GstVideoDitherMethod method,
GstVideoDitherFlags flags,
GstVideoFormat format,
guint quantizer[GST_VIDEO_MAX_COMPONENTS],
guint width);
GST_VIDEO_API
void gst_video_dither_free (GstVideoDither *dither);
GST_VIDEO_API
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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