void nesapu_device::calculate_rates()
{
int rate = clock() / 4;
screen_device *screen = machine().first_screen();
if (screen != nullptr)
{
m_samps_per_sync = rate / ATTOSECONDS_TO_HZ(machine().first_screen()->frame_period().attoseconds());
m_real_rate = m_samps_per_sync * ATTOSECONDS_TO_HZ(machine().first_screen()->frame_period().attoseconds());
}
else
{
m_samps_per_sync = rate / screen_device::DEFAULT_FRAME_RATE;
m_real_rate = m_samps_per_sync * screen_device::DEFAULT_FRAME_RATE;
}
m_buffer_size = m_samps_per_sync;
m_apu_incsize = float(clock() / (float) m_real_rate);
create_vbltimes(m_vbl_times,vbl_length,m_samps_per_sync);
create_syncs(m_samps_per_sync);
/* Adjust buffer size if 16 bits */
m_buffer_size+=m_samps_per_sync;
if (m_stream != nullptr)
m_stream->set_sample_rate(rate);
else
m_stream = machine().sound().stream_alloc(*this, 0, 1, rate);
}
void nesapu_device::calculate_rates()
{
int rate = clock() / 4;
m_samps_per_sync = 89490 / 12; // Is there a different PAL value?
m_buffer_size = m_samps_per_sync;
create_vbltimes(m_vbl_times,vbl_length,m_samps_per_sync);
create_syncs(m_samps_per_sync);
/* Adjust buffer size if 16 bits */
m_buffer_size+=m_samps_per_sync;
if (m_stream != nullptr)
m_stream->set_sample_rate(rate);
else
m_stream = machine().sound().stream_alloc(*this, 0, 1, rate);
}
void nesapu_device::device_start()
{
int rate = clock() / 4;
/* Initialize global variables */
m_samps_per_sync = rate / ATTOSECONDS_TO_HZ(machine().first_screen()->frame_period().attoseconds);
m_buffer_size = m_samps_per_sync;
m_real_rate = m_samps_per_sync * ATTOSECONDS_TO_HZ(machine().first_screen()->frame_period().attoseconds);
m_apu_incsize = (float) (clock() / (float) m_real_rate);
/* Use initializer calls */
create_noise(m_noise_lut, 13, NOISE_LONG);
create_vbltimes(m_vbl_times,vbl_length,m_samps_per_sync);
create_syncs(m_samps_per_sync);
/* Adjust buffer size if 16 bits */
m_buffer_size+=m_samps_per_sync;
/* Initialize individual chips */
(m_APU.dpcm).memory = &machine().device(m_cpu_tag)->memory().space(AS_PROGRAM);
m_stream = machine().sound().stream_alloc(*this, 0, 1, rate);
/* register for save */
for (int i = 0; i < 2; i++)
{
save_item(NAME(m_APU.squ[i].regs), i);
save_item(NAME(m_APU.squ[i].vbl_length), i);
save_item(NAME(m_APU.squ[i].freq), i);
save_item(NAME(m_APU.squ[i].phaseacc), i);
save_item(NAME(m_APU.squ[i].output_vol), i);
save_item(NAME(m_APU.squ[i].env_phase), i);
save_item(NAME(m_APU.squ[i].sweep_phase), i);
save_item(NAME(m_APU.squ[i].adder), i);
save_item(NAME(m_APU.squ[i].env_vol), i);
save_item(NAME(m_APU.squ[i].enabled), i);
}
save_item(NAME(m_APU.tri.regs));
save_item(NAME(m_APU.tri.linear_length));
save_item(NAME(m_APU.tri.vbl_length));
save_item(NAME(m_APU.tri.write_latency));
save_item(NAME(m_APU.tri.phaseacc));
save_item(NAME(m_APU.tri.output_vol));
save_item(NAME(m_APU.tri.adder));
save_item(NAME(m_APU.tri.counter_started));
save_item(NAME(m_APU.tri.enabled));
save_item(NAME(m_APU.noi.regs));
save_item(NAME(m_APU.noi.cur_pos));
save_item(NAME(m_APU.noi.vbl_length));
save_item(NAME(m_APU.noi.phaseacc));
save_item(NAME(m_APU.noi.output_vol));
save_item(NAME(m_APU.noi.env_phase));
save_item(NAME(m_APU.noi.env_vol));
save_item(NAME(m_APU.noi.enabled));
save_item(NAME(m_APU.dpcm.regs));
save_item(NAME(m_APU.dpcm.address));
save_item(NAME(m_APU.dpcm.length));
save_item(NAME(m_APU.dpcm.bits_left));
save_item(NAME(m_APU.dpcm.phaseacc));
save_item(NAME(m_APU.dpcm.output_vol));
save_item(NAME(m_APU.dpcm.cur_byte));
save_item(NAME(m_APU.dpcm.enabled));
save_item(NAME(m_APU.dpcm.irq_occurred));
save_item(NAME(m_APU.dpcm.vol));
save_item(NAME(m_APU.regs));
#ifdef USE_QUEUE
save_item(NAME(m_APU.queue));
save_item(NAME(m_APU.head));
save_item(NAME(m_APU.tail));
#else
save_item(NAME(m_APU.buf_pos));
save_item(NAME(m_APU.step_mode));
#endif
}
