Codec.FFmpeg.Scaler

Documentation

data ImageInfo

Constructors

ImageInfo

Fields

• imgWidth :: CInt
• imgHeight :: CInt
• imgFormat :: AVPixelFormat

swsInit :: ImageInfo -> ImageInfo -> SwsAlgorithm -> IO SwsContext

swsInit srcInfo dstInfo alg initializations an SwsContext to scale and convert from srcInfo to dstInfo using the algorithm alg when scaling.

swsReset :: SwsContext -> ImageInfo -> ImageInfo -> SwsAlgorithm -> IO SwsContext

Obtain a context for converting the source to destination format. If the given context is already configured for the required conversion, it is returned. Otherwise, the given context is freed and a new, configured context is returned. See swsInit for a description of the arguments.

class SwsCompatible a where

A common interface required of arguments to swsScale (a higher level wrapper for the sws_scale function from libswscale).

Minimal complete definition

swsPlanes, swsStrides, sliceHeight

Methods

swsPlanes :: a -> (Ptr (Ptr CUChar) -> IO r) -> IO r

swsStrides :: a -> (Ptr CInt -> IO r) -> IO r

sliceHeight :: a -> (CInt -> IO r) -> IO r

Instances

SwsCompatible AVFrame

Methods

swsPlanes :: AVFrame -> (Ptr (Ptr CUChar) -> IO r) -> IO r

swsStrides :: AVFrame -> (Ptr CInt -> IO r) -> IO r

sliceHeight :: AVFrame -> (CInt -> IO r) -> IO r

(Pixel a, Storable (PixelBaseComponent a)) => SwsCompatible (Image a)

Methods

swsPlanes :: Image a -> (Ptr (Ptr CUChar) -> IO r) -> IO r

swsStrides :: Image a -> (Ptr CInt -> IO r) -> IO r

sliceHeight :: Image a -> (CInt -> IO r) -> IO r

SwsCompatible (AVPixelFormat, V2 CInt, Vector CUChar)

Methods

swsPlanes :: (AVPixelFormat, V2 CInt, Vector CUChar) -> (Ptr (Ptr CUChar) -> IO r) -> IO r

swsStrides :: (AVPixelFormat, V2 CInt, Vector CUChar) -> (Ptr CInt -> IO r) -> IO r

sliceHeight :: (AVPixelFormat, V2 CInt, Vector CUChar) -> (CInt -> IO r) -> IO r

withSws :: SwsCompatible a => a -> (Ptr (Ptr CUChar) -> Ptr CInt -> CInt -> IO r) -> IO r

Supplies a continuation with all components provided by the SwsCompatible class.

swsScale :: (SwsCompatible src, SwsCompatible dst) => SwsContext -> src -> dst -> IO CInt

swsScale ctx src dst scales the entire src image to dst using the previously initialized ctx.