QuickTime 4 Reference

About Data Codec Components

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.

With the DataCodecCompress function, you can compress data using a specified compressor component. The DataCodecDecompress function lets you decompresses data using a specified compressor component.

You can also compress and decompress sprites and 3D media samples by calling the DataCodecCompress and DataCodecDecompress functions.

Your software calls the DataCodecBeginInterruptSafe function before performing a compression or decompression operation during interrupt time. When your software has finished a compression or decompression operation that must be performed during interrupt time, it can release any memory of other resources used by the DataCodecBeginInterruptSafe function to make the operation safe by calling the DataCodecEndInterruptSafe function.