libyuv_nim

Minimal and practical Nim bindings for libyuv, focused on efficient image format conversion with a clear and predictable memory layout.

Features

• NV12 / I420 / RGB24 / RGBA conversion
• Explicit RGBA memory layout (R, G, B, A)
• Zero-copy friendly design
• Debug output (PPM / PAM)

Design

RGBA layout

Memory layout is always:

R, G, B, A

Internally libyuv ABGR conversions are used to guarantee this on little-endian systems.

Types

type
  PixelRGBA = object
    r, g, b, a: uint8

  RgbaImage = object
    width: int
    height: int
    stride: int
    data: seq[PixelRGBA]

Usage

NV12 -> RGBA

let rgba = nv12.toRgba()

Save debug images

savePam("out.pam", rgba)

Convert to PNG:

convert out.pam out.png

License

MIT