[Bug 6788] New: midi sysex buffer errors

Wine Bugs wine-bugs at winehq.org
Mon Nov 27 03:53:13 CST 2006


http://bugs.winehq.org/show_bug.cgi?id=6788

           Summary: midi sysex buffer errors
           Product: Wine
           Version: 0.9.25.
          Platform: PC
               URL: http://www4.airnet.ne.jp/k_take/fs1r_editor_english.html
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-multimedia
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: mihalw at gmail.com


There is a problem with MIDI I/O with the FS1r editor.
The editor doesn't correctly read synth state, due to problems with reading
sysex messages. Wine complains with
fixme:midi:midRecThread Sysex received but no buffer to store it!

Since you need some extra hardware (the FS1r synth) to test it I will try to
explain the error.
When a larger sysex message gets received it is divided into smaller chunks (at
least it seems so in alsa). I think these chunks should be put together in wine
library (before notifying the application). Sysex messages are of the form
F0-several-bytes-F7, and only the last chunk contains F7 byte.

I have attached a sequencer dump illustrating the above (in this particular
situation there where two fixme:midi messages).

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