Processes the data in the specified source buffer and writes the processed data to the specified destination buffer.

This function is synchronous, when the function returns the data has been processed. The source buffer is converted to the appropriate coding type in the destination buffer. The buffers can be of any size, therefore there is no guarantee that all the source buffer can be processed to fill the destination buffer or that all the source buffer may be processed before the destination is full. This function therefore returns the number of source, and destination, bytes processed along with a process result code indicating completion status.

The aSource and aSink buffers passed in are derived from CMMFBuffer. The buffer type (e.g. a CMMFDataBuffer) passed in should be supported by the codec otherwise this function should leave with KErrNotSupported. The position of the source buffer should be checked by calling the source buffer's Position() member which indicates the current source read position in bytes. The codec should start processing from the current source buffer read position. The position of the destination buffer should be checked by calling the destination buffer's Position() method which indicates the current destination write position in bytes. The codec should start writing to the destination buffer at the current destination buffer write position.

This is a virtual function that each derived class must implement.

enum TCodecProcessResult

The result of the processing.

Codec reset.

Used to flush out status information when a reposition occurs. This is a virtual function that is provided should the codec require resetting prior to use.