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GstVideoDither

GstVideoDither — Utility object for dithering and quantizing lines of video

Includes

#include <gst/video/video-dither.h>

Description

GstVideoDither provides implementations of several dithering algorithms that can be applied to lines of video pixels to quantize and dither them.

Functions

gst_video_dither_free ()

void
gst_video_dither_free (GstVideoDither *dither);

Free dither

Parameters

dither

a GstVideoDither

 

gst_video_dither_line ()

void
gst_video_dither_line (GstVideoDither *dither,
                       gpointer line,
                       guint x,
                       guint y,
                       guint width);

Dither width pixels starting from offset x in line using dither .

y is the line number of line in the output image.

Parameters

dither

a GstVideoDither

 

line

pointer to the pixels of the line

 

x

x coordinate

 

y

y coordinate

 

width

the width

 

gst_video_dither_new ()

GstVideoDither *
gst_video_dither_new (GstVideoDitherMethod method,
                      GstVideoDitherFlags flags,
                      GstVideoFormat format,
                      guint quantizer[GST_VIDEO_MAX_COMPONENTS],
                      guint width);

Make a new dither object for dithering lines of format using the algorithm described by method .

Each component will be quantized to a multiple of quantizer . Better performance is achived when quantizer is a power of 2.

width is the width of the lines that this ditherer will handle.

[skip]

Parameters

method

a GstVideoDitherMethod

 

flags

a GstVideoDitherFlags

 

format

a GstVideoFormat

 

quantizer

quantizer

 

width

the width of the lines

 

Returns

a new GstVideoDither

Types and Values

GstVideoDither

typedef struct _GstVideoDither GstVideoDither;

enum GstVideoDitherFlags

Extra flags that influence the result from gst_video_chroma_resample_new().

Members

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.

 

enum GstVideoDitherMethod

Different dithering methods to use.

Members

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

 
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