///////////////////////////////////////////////////////////////////////////
//
// SDL_PCService() - Handles playing the next sample in a PC sound
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_PCService(void)
{
byte s;
word t;
if (pcSound)
{
s = *pcSound++;
if (s != pcLastSample)
{
asm pushf
asm cli
pcLastSample = s;
if (s) // We have a frequency!
{
t = pcSoundLookup[s];
asm mov bx,[t]
asm mov al,0xb6 // Write to channel 2 (speaker) timer
asm out 43h,al
asm mov al,bl
asm out 42h,al // Low byte
asm mov al,bh
asm out 42h,al // High byte
asm in al,0x61 // Turn the speaker & gate on
asm or al,3
asm out 0x61,al
}
else // Time for some silence
{
asm in al,0x61 // Turn the speaker & gate off
asm and al,0xfc // ~3
asm out 0x61,al
}
asm popf
}
if (!(--pcLengthLeft))
{
SDL_PCStopSound();
SDL_SoundFinished();
}
}
///////////////////////////////////////////////////////////////////////////
//
// SD_StopSound() - if a sound is playing, stops it
//
///////////////////////////////////////////////////////////////////////////
void
SD_StopSound(void)
{
if (DigiPlaying)
SD_StopDigitized();
switch (SoundMode)
{
default:
break;
case sdm_PC:
SDL_PCStopSound();
break;
case sdm_AdLib:
SDL_ALStopSound();
break;
}
SoundPositioned = false;
SDL_SoundFinished();
}
///////////////////////////////////////////////////////////////////////////
//
// SD_PlaySound() - plays the specified sound on the appropriate hardware
// Returns the channel of the sound if it played, else 0.
//
///////////////////////////////////////////////////////////////////////////
int SD_PlaySound(const char* sound, SoundChannel chan)
{
bool ispos;
int lp,rp;
lp = LeftPosition;
rp = RightPosition;
LeftPosition = 0;
RightPosition = 0;
ispos = nextsoundpos;
nextsoundpos = false;
const SoundData &sindex = SoundInfo[sound];
if ((SoundMode != sdm_Off) && sindex.IsNull())
return 0;
if ((DigiMode != sds_Off) && sindex.HasType(SoundData::DIGITAL))
{
if ((DigiMode == sds_PC) && (SoundMode == sdm_PC))
{
#ifdef NOTYET
if (s->priority < SoundPriority)
return 0;
SDL_PCStopSound();
SD_PlayDigitized(sindex,lp,rp);
SoundPositioned = ispos;
SoundPriority = s->priority;
#else
return 0;
#endif
}
else
{
#ifdef NOTYET
if (s->priority < DigiPriority)
return(false);
#endif
int channel = SD_PlayDigitized(sindex, lp, rp, chan);
SoundPositioned = ispos;
DigiPriority = sindex.GetPriority();
SoundPlaying = sound;
return channel;
}
return(true);
}
if (SoundMode == sdm_Off)
return 0;
// if (!s->length)
// Quit("SD_PlaySound() - Zero length sound");
if (sindex.GetPriority() < SoundPriority)
return 0;
bool didPlaySound = false;
switch (SoundMode)
{
default:
didPlaySound = true;
break;
case sdm_PC:
if(sindex.HasType(SoundData::PCSPEAKER))
{
SDL_PCPlaySound((PCSound *)sindex.GetData(SoundData::PCSPEAKER));
didPlaySound = true;
}
break;
case sdm_AdLib:
if(sindex.HasType(SoundData::ADLIB))
{
SDL_ALPlaySound((AdLibSound *)sindex.GetData(SoundData::ADLIB));
didPlaySound = true;
}
break;
}
if (didPlaySound)
{
SoundPriority = sindex.GetPriority();
SoundPlaying = sound;
}
return 0;
}
