ExYUV

Elixir binding for libyuv.

libyuv is an open source project that includes YUV scaling and conversion functionality.

Scale YUV to prepare content for compression, with point, bilinear or box filter.
Convert to YUV from webcam formats for compression.
Convert to RGB formats for rendering/effects.
Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
Optimized for SSSE3/AVX2 on x86/x64.
Optimized for Neon/SVE2/SME on Arm.
Optimized for MSA on Mips.
Optimized for RVV on RISC-V.

Formats

Formats (FOURCC) supported by libyuv are detailed here.

Core Formats

There are 2 core formats supported by libyuv - I420 and ARGB. All YUV formats can be converted to/from I420. All RGB formats can be converted to/from ARGB.

Filtering functions such as scaling and planar functions work on I420 and/or ARGB.

Planar Formats

Format	Planes	Description
`I420`	3	Y full resolution. U half width, half height. V half width, half height

Packed Formats

Format	Bits Per Pixel	Pixel Memory Layout
`RAW` (RGB)	24	`<<r::8, g::8, b::8>>`
`RGB24`	24	`<<b::8, g::8, r::8>>`
`ARGB`	32	`<<b::8, g::8, r::8, a::8>>`
`ABGR`	32	`<<r::8, g::8, b::8, a::8>>`
`BGRA`	32	`<<a::8, r::8, g::8, b::8>>`
`RGBA`	32	`<<a::8, b::8, g::8, r::8>>`
`RGB565`	16	`<<r::5, g::6, b::5>>`
`RGB1555`	16	`<<a::1, r::5, g::6, b::5>>`
`RGB4444`	16	`<<a::4, r::4, g::4, b::4>>`
`AR30`	32	`<<a::2, r::10, g::10, b::10>>`
`AB30`	32	`<<a::2, b::10, g::10, r::10>>`

Installation

The package can be installed by adding ex_yuv to your list of dependencies in mix.exs:

def deps do
  [
    {:ex_yuv, "~> 0.2.0"}
  ]
end