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- more accurate speaker output using a separate thread. This is necessary since

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Beep() does not return before the speaker is turned off.
This commit is contained in:
Volker Ruppert 2005-02-09 18:25:57 +00:00
parent 4bae4bf172
commit 3cee8f0ef5
1 changed files with 25 additions and 4 deletions
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29
bochs/iodev/speaker.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: speaker.cc,v 1.4 2005-01-29 12:08:31 vruppert Exp $
// $Id: speaker.cc,v 1.5 2005-02-09 18:25:57 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright 2003 by David N. Welton <davidw@dedasys.com>.
@ -111,6 +111,25 @@ void bx_speaker_c::beep_on(float frequency)
bx_gui->beep_on(frequency);
}
#if defined(WIN32)
struct {
DWORD frequency;
DWORD msec;
} beep_info;
DWORD WINAPI BeepThread(LPVOID)
{
static BOOL threadActive = FALSE;
while (threadActive) Sleep(10);
threadActive = TRUE;
Beep(beep_info.frequency, beep_info.msec);
threadActive = FALSE;
}
#endif
void bx_speaker_c::beep_off()
{
if (beep_frequency != 0.0) {
@ -119,9 +138,11 @@ void bx_speaker_c::beep_off()
ioctl(consolefd, KIOCSOUND, 0);
}
#elif defined(WIN32)
// FIXME: sound should start at beep_on() and end here
Bit32u msec = (bx_pc_system.time_usec() - usec_start) / 1000;
Beep((Bit32u)beep_frequency, msec);
// FIXME: sound should start at beep_on() and end here
DWORD threadID;
beep_info.msec = (DWORD)((bx_pc_system.time_usec() - usec_start) / 1000);
beep_info.frequency = (DWORD)beep_frequency;
CreateThread(NULL, 0, BeepThread, NULL, 0, &threadID);
#endif
// give the gui a chance to signal beep off