Get side information from stream.
@param stream stream @param type desired side information type @param size If supplied, *size will be set to the size of the side data or to zero if the desired side data is not present. @return pointer to data if present or NULL otherwise
See Implementation
Get side information from stream.
@param stream stream @param type desired side information type @param size If supplied, *size will be set to the size of the side data or to zero if the desired side data is not present. @return pointer to data if present or NULL otherwise