QuickTime 3 Reference
Data compressor components have a component type of DataCompressorComponentType and data decompressor components have a component type of DataDecompressorComponentType . Each component has a unique component subtype.
To open a connection to a data compressor or decompressor component, use the OpenADefaultComponent function. To interate through all available data compressors or decompressors, use the FindNextComponent function.
To decompress data using a data decompressor component, use the DataCodecDecompress routine.