AVBSFContext

public final class AVBSFContext

The bitstream filter state.

init()
Get null/pass-through bitstream filter.
Declaration
Swift

public init()


                    
                    
                    init(filter:)

Allocate a context for a given bitstream filter. The caller must fill in the context parameters as described in the documentation and then call initialize() before sending any data to the filter.

Declaration

Swift

public init(filter: AVBitStreamFilter)

Parameters


                                filter

the filter for which to allocate an instance.


                    
                    
                    init(str:)

Parse string describing list of bitstream filters and create single AVBSFContext describing the whole chain of bitstream filters.

Declaration

Swift

public init(str: String)

Parameters

str

String describing chain of bitstream filters in format bsf1[=opt1=val1:opt2=val2][,bsf2].

initialize()
Prepare the filter for use, after all the parameters and options have been set.
Declaration
Swift

public func initialize() throws


                    
                    
                    sendPacket(_:)

Submit a packet for filtering.

After sending each packet, the filter must be completely drained by calling receivePacket(_:) repeatedly until it returns AVError.tryAgain or AVError.eof.

Throws

AVError

Declaration

Swift

public func sendPacket(_ packet: AVPacket?) throws

Parameters


                                packet

the packet to filter. The bitstream filter will take ownership of the packet and reset the contents of pkt. pkt is not touched if an error occurs. This parameter may be nil, which signals the end of the stream (i.e. no more packets will be sent). That will cause the filter to output any packets it may have buffered internally.


                    
                    
                    receivePacket(_:)

Retrieve a filtered packet.

Note

one input packet may result in several output packets, so after sending a packet with sendPacket(_:), this function needs to be called repeatedly until it stops returning 0. It is also possible for a filter to output fewer packets than were sent to it, so this function may return AVError.tryAgain immediately after a successful sendPacket(_:) call.

Throws

AVError

Throws

Throws:

AVError.tryAgain if more packets need to be sent to the filter (using sendPacket(_:)) to get more output.
AVError.eof if there will be no further output from the filter.
othrer errors.

Declaration

Swift

public func receivePacket(_ packet: AVPacket) throws

Parameters


                                packet

this struct will be filled with the contents of the filtered packet. It is owned by the caller and must be freed using AVPacket.unref() when it is no longer needed. This parameter should be clean (i.e. freshly allocated with AVPacket.init() or unreffed with AVPacket.unref()) when this function is called. If this function returns successfully, the contents of pkt will be completely overwritten by the returned data. On failure, pkt is not touched.

flush()
Reset the internal bitstream filter state / flush internal buffers.
Declaration
Swift

public func flush()

AVBSFContext

class
Undocumented
Declaration
Swift

public static let `class`: AVClass


                    
                    
                    withUnsafeClassObjectPointer(_:)

Undocumented

Declaration

Swift

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

AVBSFContext


                    
                    
                    withUnsafeObjectPointer(_:)

Undocumented

Declaration

Swift

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