SwsContext

public final class SwsContext

Undocumented

init()
Create an empty SwsContext.
Declaration
Swift

public init()


                    
                    
                    init(srcWidth:srcHeight:srcPixelFormat:dstWidth:dstHeight:dstPixelFormat:flags:)

Create an SwsContext use the given parameters.

Declaration

Swift

public init?(
    srcWidth: Int, srcHeight: Int, srcPixelFormat: AVPixelFormat,
    dstWidth: Int, dstHeight: Int, dstPixelFormat: AVPixelFormat,
    flags: Flag
)

Parameters

`srcWidth`	the width of the source image
`srcHeight`	the height of the source image
`srcPixelFormat`	the source image format
`dstWidth`	the width of the destination image
`dstHeight`	the height of the destination image
`dstPixelFormat`	the destination image format
`flags`	specify which algorithm and options to use for rescaling


                    
                    
                    scale(src:srcStride:srcSliceY:srcSliceHeight:dst:dstStride:)

Scale the image slice in src and put the resulting scaled slice in the image in dst.

A slice is a sequence of consecutive rows in an image.

Slices have to be provided in sequential order, either in top-bottom or bottom-top order. If slices are provided in non-sequential order the behavior of the function is undefined.

Throws

AVError

Declaration

Swift

@discardableResult
public func scale(
    src: UnsafePointer<UnsafePointer<UInt8>?>,
    srcStride: UnsafePointer<Int32>,
    srcSliceY: Int,
    srcSliceHeight: Int,
    dst: UnsafePointer<UnsafeMutablePointer<UInt8>?>,
    dstStride: UnsafePointer<Int32>
) throws -> Int

Parameters

`src`	the array containing the pointers to the planes of the source slice
`srcStride`	the array containing the strides for each plane of the source image
`srcSliceY`	the position in the source image of the slice to process, that is the number (counted starting from zero) in the image of the first row of the slice
`srcSliceHeight`	the height of the source slice, that is the number of rows in the slice
`dst`	the array containing the pointers to the planes of the destination image
`dstStride`	the array containing the strides for each plane of the destination image

Return Value

the height of the output slice


                    
                    
                    supportsInput(_:)

Returns a Boolean value indicating whether the pixel format is a supported input format.

Declaration

Swift

public static func supportsInput(_ pixFmt: AVPixelFormat) -> Bool

Parameters


                                pixFmt

pixel format

Return Value

true if it is supported; otherwise false.


                    
                    
                    supportsOutput(_:)

Returns a Boolean value indicating whether the pixel format is a supported output format.

Declaration

Swift

public static func supportsOutput(_ pixFmt: AVPixelFormat) -> Bool

Parameters


                                pixFmt

pixel format

Return Value

true if it is supported; otherwise false.


                    
                    
                    supportsEndiannessConversion(_:)

Returns a Boolean value indicating whether an endianness conversion is supported.

Declaration

Swift

public static func supportsEndiannessConversion(_ pixFmt: AVPixelFormat) -> Bool

Parameters


                                pixFmt

pixel format

Return Value

true if it is supported; otherwise false.

SwsContext

Flag
Undocumented
See more
Declaration
Swift

public struct Flag : OptionSet

SwsContext

class
Undocumented
Declaration
Swift

public static let `class`: AVClass


                    
                    
                    withUnsafeClassObjectPointer(_:)

Undocumented

Declaration

Swift

public func withUnsafeClassObjectPointer<T>(_ body: (UnsafeMutableRawPointer) throws -> T) rethrows -> T

SwsContext


                    
                    
                    withUnsafeObjectPointer(_:)

Undocumented

Declaration

Swift

public func withUnsafeObjectPointer<T>(_ body: (UnsafeMutableRawPointer) throws -> T) rethrows -> T