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