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Plain import of the library parts first. Adaptions to Rockbox will follow. A *lot* of kudos go to Mihaly Horvath for creating this library from his already lightweight cSID-light, mainly for Rockbox. Besides a lot of other things, he made his algorithms integer-only and significantly improved the C64 emulation, so finally RSIDs could be played as well as PSIDs. TinySID was nice for what it is, but this is a quantum leap in SID playback quality for Rockbox. Check for example: https://hvsc.csdb.dk/MUSICIANS/P/Page_Jason/Eighth.sid https://hvsc.csdb.dk/MUSICIANS/J/Jeff/Blowing.sid Change-Id: I353e12fbfd7cd8696b834616e55743e7b844a73e
39 lines
2 KiB
Text
39 lines
2 KiB
Text
cRSID by Hermit (Mihaly Horvath) - Year 2022
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This is a serious integer-only update (rewrite) to my cSID and cSID-light
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commandline SID-players, aiming for an ongoing inclusion into RockBox,
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as per a request by Ninja earlier at CSDb. He will do the integration.
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The name now contains the 'R' because now a RealSID-like environment-mode
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(CIA, VIC, IRQ, NMI) is supported more-or-less ('RealSIDmode' in source).
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There are still many RSID tunes that are not played properly, mainly
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the tricky ones which use DC04 or DD0C as jump-addresses or RTI placeholders,
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like for example 'Hi Fi Sky', and other modern digi tunes.
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I don't feel like debugging these complex tunes now...
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PSID-only playback has improved a lot since cSID-light-1.1,
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and now many PlaySID-digis are supported as well if that still matters.
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The CPU and ADSR went through serious timing improvements,
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it's now can be called cycle-exact, and hardrestarts and delaybugs are now
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simulated well, no missed notes, whatever.
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This release also contains shared and static library forms for better
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inclusion in other SID-playback projects (like FlexSID for example).
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I completely eliminated global variables and definitions, except a
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'cRSID_c64' instance which is for faster access of struct members.
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(Emulated C64 memory accesses are made to this for faster operation.)
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More info (the API for the library) is seen in the 'libcRSID.h' file.
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It has been tried already on a SanDisk RockBox device and tunes not
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containing digis are already played on it fine. Tunes with 2SID/3SID or
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digis however are too much for the player (38MHz..192MHz ARM) at this form.
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So maybe the code will be optimized by eliminating overheads of structs,
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pointers, optimizing function-calls, inlining, and by other possible means.
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Hopefully in the near future the outdated TinySID engine will be replaced
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in the RockBox source-tree...
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License is still WTF: Do what the fuck you want with this code, but
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it would be nice mentioning me as the original author.
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