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- implemented pc speaker beep in the lowlevel sound module for win32

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- improved square wave generator code
This commit is contained in:
Volker Ruppert 2012-05-21 18:45:09 +00:00
parent 8e7f582bc3
commit f4134d5d29
1 changed files with 25 additions and 14 deletions
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39
bochs/iodev/sound/soundmod.cc
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@ -83,26 +83,36 @@ Bit8u *beep_buffer;
int beep_bytes, beep_bufsize;
bx_bool beep_active = 0;
#ifdef WIN32
DWORD WINAPI beep_thread(LPVOID indata)
#else
void beep_thread(void *indata)
#endif
{
Bit8u level;
int i;
int i, j;
beep_active = 1;
bx_sound_lowlevel_c *soundmod = (bx_sound_lowlevel_c*)indata;
level = 0x40;
i = 0;
do {
beep_buffer[i] = level;
if ((++i % beep_bytes) == 0) level ^= 0x40;
} while (i < beep_bufsize);
while (beep_bytes > 0) {
j = 0;
do {
beep_buffer[j++] = level;
if ((++i % beep_bytes) == 0) level ^= 0x40;
} while (j < beep_bufsize);
soundmod->sendwavepacket(beep_bufsize, beep_buffer);
#ifdef WIN32
Sleep(100);
#endif
}
soundmod->stopwaveplayback();
free(beep_buffer);
beep_active = 0;
#ifndef WIN32
#ifdef WIN32
return 0;
#else
pthread_exit(NULL);
#endif
}
@ -111,18 +121,19 @@ bx_bool bx_soundmod_ctl_c::beep_on(float frequency)
{
if (soundmod != NULL) {
BX_DEBUG(("Beep ON (frequency=%.2f)",frequency));
#ifndef WIN32
if (!beep_active) {
soundmod->startwaveplayback(44100, 8, 0, 0);
beep_bytes = (int)(44100.0 / frequency / 2);
beep_bufsize = (4410 / beep_bytes / 2) * beep_bytes * 2;
beep_bufsize = 4410;
beep_buffer = (Bit8u*)malloc(beep_bufsize);
#ifdef WIN32
DWORD threadID;
CreateThread(NULL, 0, beep_thread, soundmod, 0, &threadID);
#else
pthread_create(&thread, NULL, (void *(*)(void *))&beep_thread, soundmod);
#endif
}
return 1;
#else
return 0;
#endif
}
return 0;
}
@ -133,13 +144,13 @@ bx_bool bx_soundmod_ctl_c::beep_off()
BX_DEBUG(("Beep OFF"));
if (beep_active) {
beep_bytes = 0;
#ifndef WIN32
#ifdef WIN32
while (beep_active) Sleep(1);
#else
pthread_join(thread, NULL);
#endif
}
#ifndef WIN32
return 1;
#endif
}
return 0;
}