multimedia.class 52.14

This time helper methods for implementing seek in subclasses. PreSeek/PostSeek pair has similar purpose as PrePull/PostPull. They do all the framework "bookkeeping", parameters verification, detection of seek past end of stream, method forwarding along the pipeline, log messages and so on. What is also important, PreSeek implements automatic "seek-by-read" fallback for not seekable data sources. Then a subclass implementor may be sure he can always perform forward seek in his demuxer/decoder, even for streams like http.stream (which is not seekable).

multiread.buffer 51.5

No functional changes, just uses pull and seek helpers in the new multimedia.class, it requires multimedia.class 52.14+ for this reason. Updated documentation.

Both classes available at MorphOS Files.