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parallel-gx1/Source
LibretroAdmin 30a5010c5a DVD: reads of a plain image copied straight from its mapping
A GameCube disc in a plain image is lent by the volume as it lies in
the mapped file. Such a read never goes to the DVD thread and has no
buffer: it starts by asking the OS to prefetch its pages, and when it
is due its bytes go from the mapping into emulated memory, or to the
DTK stream, in one copy. Compressed, encrypted and assembled images
keep the DVD thread.

A savestate stores pending lent reads as the results the DVD thread
would have made, so states keep their format, and a disc change turns
them into results before the old image goes.
2026-11-07 03:27:04 +01:00
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2026-11-05 03:13:53 +01:00