Example of creating a biplanar (YUV422) IOSurface

CreateBiplanarIOSurface.m

NSUInteger width = 1024;
NSUInteger height = 768;
OSType pixelFormat = kCVPixelFormatType_422YpCbCr8BiPlanarFullRange;
NSUInteger plane0BytesPerPixel = 1;
NSUInteger plane1BytesPerPixel = 1;

NSUInteger plane0BytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, plane0BytesPerPixel * width);
NSUInteger plane0AllocSize = IOSurfaceAlignProperty(kIOSurfaceAllocSize, plane0BytesPerRow * height);
NSUInteger plane1BytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, plane1BytesPerPixel * width);
NSUInteger plane1AllocSize = IOSurfaceAlignProperty(kIOSurfaceAllocSize, plane1BytesPerRow * height);

NSArray *planeInfo = @[
    @{
        (id)kIOSurfacePlaneWidth : @(width),
        (id)kIOSurfacePlaneHeight : @(height),
        (id)kIOSurfacePlaneBytesPerRow : @(plane0BytesPerRow),
        (id)kIOSurfaceAllocSize : @(plane0AllocSize),
        (id)kIOSurfacePlaneOffset : @(0),
    },
    @{
        (id)kIOSurfacePlaneWidth : @(width),
        (id)kIOSurfacePlaneHeight : @(height),
        (id)kIOSurfacePlaneBytesPerRow : @(plane1BytesPerRow),
        (id)kIOSurfaceAllocSize : @(plane1AllocSize),
        (id)kIOSurfacePlaneOffset : @(plane0AllocSize),
    }
];

NSDictionary *surfaceProperties = @{
    (id)kIOSurfaceWidth : @(width),
    (id)kIOSurfaceHeight : @(height),
    (id)kIOSurfacePixelFormat : @(pixelFormat),
    (id)kIOSurfacePlaneInfo : planeInfo,
    (id)kIOSurfaceAllocSize : @(plane0AllocSize + plane1AllocSize)
};

IOSurfaceRef surface = IOSurfaceCreate((__bridge CFDictionaryRef)surfaceProperties);

CreateBiplanarIOSurface.swift

import IOSurface
import CoreVideo

let width = 1024
let height = 768
let pixelFormat = kCVPixelFormatType_422YpCbCr8BiPlanarFullRange
let plane0BytesPerPixel = 1
let plane1BytesPerPixel = 1

let plane0BytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, plane0BytesPerPixel * width)
let plane0AllocSize = IOSurfaceAlignProperty(kIOSurfaceAllocSize, plane0BytesPerRow * height)
let plane1BytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, plane1BytesPerPixel * width)
let plane1AllocSize = IOSurfaceAlignProperty(kIOSurfaceAllocSize, plane1BytesPerRow * height)

let planeInfo = [
    [
        kIOSurfacePlaneWidth : width,
        kIOSurfacePlaneHeight : height,
        kIOSurfacePlaneBytesPerRow : plane0BytesPerRow,
        kIOSurfaceAllocSize : plane0AllocSize,
        kIOSurfacePlaneOffset : 0,
    ],
    [
        kIOSurfacePlaneWidth : width,
        kIOSurfacePlaneHeight : height,
        kIOSurfacePlaneBytesPerRow : plane1BytesPerRow,
        kIOSurfaceAllocSize : plane1AllocSize,
        kIOSurfacePlaneOffset : plane0AllocSize,
    ]
]

let surfaceProperties : [CFString : Any] = [
    kIOSurfaceWidth : width,
    kIOSurfaceHeight : height,
    kIOSurfacePixelFormat : pixelFormat,
    kIOSurfacePlaneInfo : planeInfo,
    kIOSurfaceAllocSize : plane0AllocSize + plane1AllocSize
]

let surface = IOSurfaceCreate(surfaceProperties as CFDictionary)