GstVideoDither

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

GstVideoDither

GstVideo.VideoDither

Methods

gst_video_dither_free

gst_video_dither_free (GstVideoDither * dither)

Free dither

Parameters:

dither –

a GstVideoDither

GstVideo.VideoDither.prototype.free

function GstVideo.VideoDither.prototype.free(): {
    // javascript wrapper for 'gst_video_dither_free'
}

Free dither

Parameters:

dither (GstVideo.VideoDither) –

a GstVideo.VideoDither

GstVideo.VideoDither.free

def GstVideo.VideoDither.free (self):
    #python wrapper for 'gst_video_dither_free'

Free dither

Parameters:

dither (GstVideo.VideoDither) –

a GstVideo.VideoDither

gst_video_dither_line

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

GstVideo.VideoDither.prototype.line

function GstVideo.VideoDither.prototype.line(line: Object, x: Number, y: Number, width: Number): {
    // javascript wrapper for 'gst_video_dither_line'
}

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

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

Parameters:

dither (GstVideo.VideoDither) –

a GstVideo.VideoDither

line (Object) –

pointer to the pixels of the line

x (Number) –

x coordinate

y (Number) –

y coordinate

width (Number) –

the width

GstVideo.VideoDither.line

def GstVideo.VideoDither.line (self, line, x, y, width):
    #python wrapper for 'gst_video_dither_line'

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

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

Parameters:

dither (GstVideo.VideoDither) –

a GstVideo.VideoDither

line (object) –

pointer to the pixels of the line

x (int) –

x coordinate

y (int) –

y coordinate

width (int) –

the width

Functions

gst_video_dither_new

GstVideoDither *
gst_video_dither_new (GstVideoDitherMethod method,
                      GstVideoDitherFlags flags,
                      GstVideoFormat format,
                      guint * quantizer,
                      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 achieved when quantizer is a power of 2.

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

Parameters:

method –

a GstVideoDitherMethod

flags –

a GstVideoDitherFlags

format –

a GstVideoFormat

quantizer ( [array fixed-size=4]) –

quantizer

width –

the width of the lines

Returns –

a new GstVideoDither

Enumerations

GstVideoDitherFlags

Extra flags that influence the result from gst_video_chroma_resample_new.

Members

GST_VIDEO_DITHER_FLAG_NONE (0) –

no flags

GST_VIDEO_DITHER_FLAG_INTERLACED (1) –

the input is interlaced

GST_VIDEO_DITHER_FLAG_QUANTIZE (2) –

quantize values in addition to adding dither.

GstVideo.VideoDitherFlags

Extra flags that influence the result from gst_video_chroma_resample_new (not introspectable).

Members

GstVideo.VideoDitherFlags.NONE (0) –

no flags

GstVideo.VideoDitherFlags.INTERLACED (1) –

the input is interlaced

GstVideo.VideoDitherFlags.QUANTIZE (2) –

quantize values in addition to adding dither.

GstVideo.VideoDitherFlags

Extra flags that influence the result from gst_video_chroma_resample_new (not introspectable).

Members

GstVideo.VideoDitherFlags.NONE (0) –

no flags

GstVideo.VideoDitherFlags.INTERLACED (1) –

the input is interlaced

GstVideo.VideoDitherFlags.QUANTIZE (2) –

quantize values in addition to adding dither.

GstVideoDitherMethod

Different dithering methods to use.

Members

GST_VIDEO_DITHER_NONE (0) –

no dithering

GST_VIDEO_DITHER_VERTERR (1) –

propagate rounding errors downwards

GST_VIDEO_DITHER_FLOYD_STEINBERG (2) –

Dither with floyd-steinberg error diffusion

GST_VIDEO_DITHER_SIERRA_LITE (3) –

Dither with Sierra Lite error diffusion

GST_VIDEO_DITHER_BAYER (4) –

ordered dither using a bayer pattern

GstVideo.VideoDitherMethod

Different dithering methods to use.

Members

GstVideo.VideoDitherMethod.NONE (0) –

no dithering

GstVideo.VideoDitherMethod.VERTERR (1) –

propagate rounding errors downwards

GstVideo.VideoDitherMethod.FLOYD_STEINBERG (2) –

Dither with floyd-steinberg error diffusion

GstVideo.VideoDitherMethod.SIERRA_LITE (3) –

Dither with Sierra Lite error diffusion

GstVideo.VideoDitherMethod.BAYER (4) –

ordered dither using a bayer pattern

GstVideo.VideoDitherMethod

Different dithering methods to use.

Members

GstVideo.VideoDitherMethod.NONE (0) –

no dithering

GstVideo.VideoDitherMethod.VERTERR (1) –

propagate rounding errors downwards

GstVideo.VideoDitherMethod.FLOYD_STEINBERG (2) –

Dither with floyd-steinberg error diffusion

GstVideo.VideoDitherMethod.SIERRA_LITE (3) –

Dither with Sierra Lite error diffusion

GstVideo.VideoDitherMethod.BAYER (4) –

ordered dither using a bayer pattern

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