int AY8910_sh_start(void)
{
if (AY8910_init(8000000, SAMPLE_RATE, NULL, NULL, NULL, NULL) != 0)
return 1;
build_mixer_table();
return 0;
}
void *ay8910_start_ym(sound_type chip_type, int sndindex, int clock, const struct AY8910interface *intf)
{
ay8910_context *info;
info = auto_malloc(sizeof(*info));
memset(info, 0, sizeof(*info));
info->index = sndindex;
info->intf = intf;
if ((info->intf->flags & AY8910_SINGLE_OUTPUT) != 0)
{
logerror("AY-3-8910/YM2149 using single output!\n");
info->streams = 1;
}
else
info->streams = 3;
switch (chip_type)
{
case SOUND_AY8910:
case SOUND_AY8930:
info->step = 2;
info->par = &ay8910_param;
info->par_env = &ay8910_param;
info->zero_is_off = 1;
info->env_step_mask = 0x0F;
break;
case SOUND_YM2149:
case SOUND_YM2203:
case SOUND_YM2610:
case SOUND_YM2610B:
case SOUND_YM2608:
case SOUND_YMZ284:
case SOUND_YMZ294:
case SOUND_YM3439:
default:
info->step = 1;
info->par = &ym2149_param;
info->par_env = &ym2149_param_env;
info->zero_is_off = 0;
info->env_step_mask = 0x1F;
break;
}
build_mixer_table(info);
/* The envelope is pacing twice as fast for the YM2149 as for the AY-3-8910, */
/* This handled by the step parameter. Consequently we use a divider of 8 here. */
info->channel = stream_create(0,info->streams,clock / 8 ,info,ay8910_update);
ay8910_set_clock_ym(info,clock);
ay8910_statesave(info, sndindex);
return info;
}
INT32 AY8910Init(INT32 chip, INT32 clock, INT32 sample_rate,
read8_handler portAread, read8_handler portBread,
write8_handler portAwrite, write8_handler portBwrite)
{
struct AY8910 *PSG = &AYPSG[chip];
#if defined FBA_DEBUG
#ifdef __GNUC__
DebugSnd_AY8910Initted = 1;
#endif
#endif
AYStreamUpdate = dummy_callback;
if (chip != num) {
return 1;
}
memset(PSG, 0, sizeof(struct AY8910));
PSG->SampleRate = sample_rate;
PSG->PortAread = portAread;
PSG->PortBread = portBread;
PSG->PortAwrite = portAwrite;
PSG->PortBwrite = portBwrite;
AY8910_set_clock(chip, clock);
build_mixer_table(chip);
// default routes
AY8910Volumes[(chip * 3) + BURN_SND_AY8910_ROUTE_1] = 1.00;
AY8910Volumes[(chip * 3) + BURN_SND_AY8910_ROUTE_2] = 1.00;
AY8910Volumes[(chip * 3) + BURN_SND_AY8910_ROUTE_3] = 1.00;
AY8910RouteDirs[(chip * 3) + BURN_SND_AY8910_ROUTE_1] = BURN_SND_ROUTE_BOTH;
AY8910RouteDirs[(chip * 3) + BURN_SND_AY8910_ROUTE_2] = BURN_SND_ROUTE_BOTH;
AY8910RouteDirs[(chip * 3) + BURN_SND_AY8910_ROUTE_3] = BURN_SND_ROUTE_BOTH;
AY8910Reset(chip);
num++;
return 0;
}
int AY8910_sh_start(const struct MachineSound *msound)
{
int chip;
const struct AY8910interface *intf = msound->sound_interface;
num = intf->num;
for (chip = 0;chip < num;chip++)
{
if (AY8910_init(sound_name(msound),chip+ym_num,intf->baseclock,
intf->mixing_level[chip] & 0xffff,
Machine->sample_rate,
intf->portAread[chip],intf->portBread[chip],
intf->portAwrite[chip],intf->portBwrite[chip]) != 0)
return 1;
build_mixer_table(chip+ym_num);
}
return 0;
}
void *ay8910_start_ym(int chip_type, int sndindex, int clock, int streams,
read8_handler portAread, read8_handler portBread,
write8_handler portAwrite, write8_handler portBwrite)
{
struct AY8910 *info;
info = auto_malloc(sizeof(*info));
memset(info, 0, sizeof(*info));
info->index = sndindex;
info->streams = streams;
AY8910_init(info, streams, clock,
clock/8,
portAread,portBread,
portAwrite,portBwrite);
build_mixer_table(info);
AY8910_statesave(info, sndindex);
return info;
}