AVPixFmtDescriptor

Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes of an image. It also stores the subsampling factors and number of components.

@note This is separate of the colorspace (RGB, YCbCr, YPbPr, JPEG-style YUV and all the YUV variants) AVPixFmtDescriptor just stores how values are stored not what these values represent.

Members

Variables

alias_
const(char)* alias_;

Alternative comma-separated names.

comp
AVComponentDescriptor[4] comp;

Parameters that describe how pixels are packed. If the format has 1 or 2 components, then luma is 0. If the format has 3 or 4 components: if the RGB flag is set then 0 is red, 1 is green and 2 is blue; otherwise 0 is luma, 1 is chroma-U and 2 is chroma-V.

flags
ulong flags;

Combination of AV_PIX_FMT_FLAG_... flags.

log2_chroma_h
ubyte log2_chroma_h;

Amount to shift the luma height right to find the chroma height. For YV12 this is 1 for example. chroma_height= AV_CEIL_RSHIFT(luma_height, log2_chroma_h) The note above is needed to ensure rounding up. This value only refers to the chroma components.

log2_chroma_w
ubyte log2_chroma_w;

Amount to shift the luma width right to find the chroma width. For YV12 this is 1 for example. chroma_width = AV_CEIL_RSHIFT(luma_width, log2_chroma_w) The note above is needed to ensure rounding up. This value only refers to the chroma components.

name
const(char)* name;
Undocumented in source.
nb_components
ubyte nb_components;

< The number of components each pixel has, (1-4)

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