Support for midi files with RIFF header?

[Boscop]

It would be great if midi files that have a RIFF header could be loaded, too :)

E.g.:
http://www.midiarchive.co.uk/downloadfile/Classics/Beethoven/Beethoven.rmi

It just requires skipping those header bytes:

https://www.loc.gov/preservation/digital/formats/fdd/fdd000120.shtml

Hex: 52 49 46 46 xx xx xx xx 52 4D 49 44 64 61 74 61
ASCII: RIFF....RMIDdata

https://www.garykessler.net/library/file_sigs.html

52 49 46 46 xx xx xx xx52 4D 49 44 64 61 74 61	RIFF....RMIDdata
RMI	Resource Interchange File Format -- Windows MusicalInstrument Digital Interface file, where xx xx xx xx is the filesize (little endian)

Not sure what those 4 bytes before MThd are but they can also be skipped.

---

Btw, here is how I implemented this for rimd a while ago:
https://github.com/RustAudio/rimd/blob/54fd9bd2bd3caaa6fe1c31fbf71c0f3c6597fd1a/src/reader.rs#L14-L25

At first it reads 14 bytes because the normal midi file header is 14 bytes (MThd.........ð in the case above). But if the first 4 bytes are RIFF, it skips 6 bytes so that it has skipped the first 20 bytes in total, and then it reads the real midi header into the header buffer.

[kovaxis]

Hello again, sorry for the late reply.

I've currently implemented this in the 0.4.1 version, but cargo seems to refuse to upload it with a 500 HTTP error :/

It's currently there in the master branch though, and I'll upload it as soon as I can.

Never seen that kind of RMID files before. Pretty niche huh. Anyways it's a nice self-contained addition to the library.