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<title>GstVideoDither: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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Top  | 
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                  Description
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GstVideoDither
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GstVideoDither — Utility object for dithering and quantizing lines of video
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Functions
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void
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gst_video_dither_free ()
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void
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gst_video_dither_line ()
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GstVideoDither *
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gst_video_dither_new ()
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Types and Values
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GstVideoDither
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enum
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GstVideoDitherFlags
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enum
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GstVideoDitherMethod
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Includes
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#include <gst/video/video.h>
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Description
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GstVideoDither provides implementations of several dithering algorithms
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that can be applied to lines of video pixels to quantize and dither them.
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Functions
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gst_video_dither_free ()
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void
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gst_video_dither_free (GstVideoDither *dither);
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Free dither
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Parameters
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dither
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a GstVideoDither
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gst_video_dither_line ()
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void
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gst_video_dither_line (GstVideoDither *dither,
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                       gpointer line,
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                       guint x,
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                       guint y,
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                       guint width);
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Dither width
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 pixels starting from offset x
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 in line
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 using dither
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.
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y
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 is the line number of line
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 in the output image.
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Parameters
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dither
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a GstVideoDither
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line
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pointer to the pixels of the line
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x
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x coordinate
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y
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y coordinate
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width
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the width
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gst_video_dither_new ()
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GstVideoDither *
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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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Make a new dither object for dithering lines of format
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 using the
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algorithm described by method
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.
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Each component will be quantized to a multiple of quantizer
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. Better
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performance is achived when quantizer
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 is a power of 2.
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width
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 is the width of the lines that this ditherer will handle.
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[skip]
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Parameters
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method
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a GstVideoDitherMethod
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flags
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a GstVideoDitherFlags
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format
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a GstVideoFormat
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quantizer
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quantizer
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width
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the width of the lines
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Returns
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 a new GstVideoDither
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Types and Values
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GstVideoDither
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typedef struct _GstVideoDither GstVideoDither;
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enum GstVideoDitherFlags
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Extra flags that influence the result from gst_video_chroma_resample_new().
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Members
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GST_VIDEO_DITHER_FLAG_NONE
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no flags
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GST_VIDEO_DITHER_FLAG_INTERLACED
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the input is interlaced
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GST_VIDEO_DITHER_FLAG_QUANTIZE
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quantize values in addition to adding dither.
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enum GstVideoDitherMethod
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Different dithering methods to use.
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Members
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GST_VIDEO_DITHER_NONE
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no dithering
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GST_VIDEO_DITHER_VERTERR
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propagate rounding errors downwards
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GST_VIDEO_DITHER_FLOYD_STEINBERG
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Dither with floyd-steinberg error diffusion
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GST_VIDEO_DITHER_SIERRA_LITE
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Dither with Sierra Lite error diffusion
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GST_VIDEO_DITHER_BAYER
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ordered dither using a bayer pattern
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