class abstract

Subclasses of CodecFilter provide low-level interfaces to their algorithms and direct the processing of data.

Generics: P defines the type to use for the CodecBuffer's memory pointer. CB is the implementation type for an abstract CodecBuffer of type P

A CodecFilter contains two buffers. An buffer _inputBuffer to incoming bytes to process. an buffer _outputBuffer to for outgoing processed bytes.

A CodecFilter also maintains a state which can help implementations know what part of the lifecycle the filter is in (i.e. processing vs closed)

Implementers

Constructors

CodecFilter({required int inputBufferLength, required int outputBufferLength}): Constructor which allows the user to set the input/output buffer lengths.

closed → bool: Return true if filter is in closed state.
no setter
finalized → bool: Return true if filter is in finalized state.
no setter
hashCode → int: The hash code for this object.
no setterinherited
init → bool: Return true if filter is in init state.
no setter
processing → bool: Return true if filter is in opened state.
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
state ↔ CodecFilterState: State tracker for filters.
getter/setter pair

close() → void: Close this filter if not already closed.
doClose() → void: Subclass Responsibility: Tear-down the filter
doFinalize(CB outputBuffer) → int: Subclass Responsibility: Perform algorithm-specific finalization.
doFlush(CB outputBuffer) → int: Subclass Responsibility: Perform algorithm-specific flush.
doInit(CodecBufferHolder<P, CB> inputBufferHolder, CodecBufferHolder<P, CB> outputBufferHolder, List<int> bytes, int start, int end) → int: Subclass Responsibility: Init the filter
doProcessing(CB inputBuffer, CB outputBuffer) → CodecResult: Subclass Responsibility: Algorithm-specific coding/decoding handler
hasMoreToProcess() → bool: Return true if there is more data to process, false otherwise.
newBufferHolder(int bufferLength) → CodecBufferHolder<P, CB>: Subclass Responsibility: Return a concrete CodecBufferHolder.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
process(List<int> data, int start, int end) → void: Process a chunk of data from start to end. A call to process should only be made when processed returns null.
processed({bool flush = true, bool end = false}) → List<int>?: Return a chunk of processed data.
toString() → String: A string representation of this object.
inherited