[PATCH 21/25] mciseq: Remain responsive while processing large delays. (try 4)

[Joerg-Cyril.Hoehle at t-systems.com]

Hi,

some MIDI initialisation files contain huge delays (I can't remember
whether KDE's silence.mid is one such file).
While sleeping and unlike native, the Wine driver was completely
unresponsive to Pause/Stop/Close.
My notes mention that at least one application is affected by this.

We could have waited for an event in such a case, however
- the currently used Sleep has little overhead whereas
- WaitForSingleObject(hEvent, time) goes through the server,
  so I don't like it much as a time base and I observed that
  w9x continues to update Status Position (unlike w7), so I
  implemented somewhat compatible behaviour, ticking once per second.

static  DWORD   MIDI_ConvertPulseToMS(WINE_MCIMIDI* wmm, DWORD pulse)
-    if (wmm->nDivision == 0) {
Since computing maxDelta corresponds to the inverse of PulseToMS,
I checked that function.  As mentioned about patch 15/25, this check
has become superfluous: you cannot call Status anymore without a valid
MIDI file and that won't allow a zero wmm->nDivision.

Now hopefully we'll see all 25 MIDI patches in wine-1.5.15.

Regards,
        Jörg Höhle
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