static void audio_event_reset (void)
{
int i;
last_cycles = get_cycles ();
next_sample_evtime = scaled_sample_evtime;
if (!isrestore ()) {
for (i = 0; i < 4; i++)
zerostate (audio_channel + i);
}
schedule_audio ();
events_schedule ();
}
void audio_reset (void)
{
memset (audio_channel, 0, 4 * sizeof *audio_channel);
audio_channel[0].per = PERIOD_MAX;
audio_channel[1].per = PERIOD_MAX;
audio_channel[2].per = PERIOD_MAX;
audio_channel[3].per = PERIOD_MAX;
#ifndef NO_AHI_CHANNELS
memset (audio_channel + 4, 0, 2 * sizeof *audio_channel);
audio_channel[4].per = PERIOD_MAX;
audio_channel[5].per = PERIOD_MAX;
#endif
last_cycles = 0;
#ifdef ENABLE_AHI_SOUND
sound_ahi_enabled = 0;
ahi_interrupt_state = 0;
#endif
next_sample_evtime = scaled_sample_evtime;
schedule_audio ();
}
void sound_default_evtime(void)
{
int pal = beamcon0 & 0x20;
switch(m68k_speed)
{
case 6:
scaled_sample_evtime=(unsigned)(MAXHPOS_PAL*MAXVPOS_PAL*VBLANK_HZ_PAL*CYCLE_UNIT/1.86)/sound_rate;
break;
case 5:
case 4: // ~4/3 234
if (pal)
scaled_sample_evtime=(MAXHPOS_PAL*244*VBLANK_HZ_PAL*CYCLE_UNIT)/sound_rate; // ???
else
scaled_sample_evtime=(MAXHPOS_NTSC*255*VBLANK_HZ_NTSC*CYCLE_UNIT)/sound_rate;
break;
case 3:
case 2: // ~8/7 273
if (pal)
scaled_sample_evtime=(MAXHPOS_PAL*270*VBLANK_HZ_PAL*CYCLE_UNIT)/sound_rate;
else
scaled_sample_evtime=(MAXHPOS_NTSC*255*VBLANK_HZ_NTSC*CYCLE_UNIT)/sound_rate;
break;
case 1:
default: // MAXVPOS_PAL?
if (pal)
scaled_sample_evtime=(MAXHPOS_PAL*313*VBLANK_HZ_PAL*CYCLE_UNIT)/sound_rate;
else
scaled_sample_evtime=(MAXHPOS_NTSC*MAXVPOS_NTSC*VBLANK_HZ_NTSC*CYCLE_UNIT)/sound_rate + 1;
break;
}
schedule_audio();
}
