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diff --git a/src/devices/sound/multipcm.cpp b/src/devices/sound/multipcm.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Miguel Angel Horna
+/*
+ * Sega System 32 Multi/Model 1/Model 2 custom PCM chip (315-5560) emulation.
+ *
+ * by Miguel Angel Horna (ElSemi) for Model 2 Emulator and MAME.
+ * Information by R. Belmont and the YMF278B (OPL4) manual.
+ *
+ * voice registers:
+ * 0: Pan
+ * 1: Index of sample
+ * 2: LSB of pitch (low 2 bits seem unused so)
+ * 3: MSB of pitch (ooooppppppppppxx) (o=octave (4 bit signed), p=pitch (10 bits), x=unused?
+ * 4: voice control: top bit = 1 for key on, 0 for key off
+ * 5: bit 0: 0: interpolate volume changes, 1: direct set volume,
+ bits 1-7 = volume attenuate (0=max, 7f=min)
+ * 6: LFO frequency + Phase LFO depth
+ * 7: Amplitude LFO size
+ *
+ * The first sample ROM contains a variable length table with 12
+ * bytes per instrument/sample. This is very similar to the YMF278B.
+ *
+ * The first 3 bytes are the offset into the file (big endian). (0, 1, 2)
+ * The next 2 are the loop start offset into the file (big endian) (3, 4)
+ * The next 2 are the 2's complement of the total sample size (big endian) (5, 6)
+ * The next byte is LFO freq + depth (copied to reg 6 ?) (7, 8)
+ * The next 3 are envelope params (Attack, Decay1 and 2, sustain level, release, Key Rate Scaling) (9, 10, 11)
+ * The next byte is Amplitude LFO size (copied to reg 7 ?)
+ *
+ * TODO
+ * - The YM278B manual states that the chip supports 512 instruments. The MultiPCM probably supports them
+ * too but the high bit position is unknown (probably reg 2 low bit). Any game use more than 256?
+ *
+ */
+
+#include "emu.h"
+#include "multipcm.h"
+
+ALLOW_SAVE_TYPE(multipcm_device::state_t); // allow save_item on a non-fundamental type
+
+/*******************************
+ ENVELOPE SECTION
+*******************************/
+
+//Times are based on a 44100Hz timebase. It's adjusted to the actual sampling rate on startup
+
+const double multipcm_device::BASE_TIMES[64] = {
+ 0, 0, 0, 0,
+ 6222.95, 4978.37, 4148.66, 3556.01,
+ 3111.47, 2489.21, 2074.33, 1778.00,
+ 1555.74, 1244.63, 1037.19, 889.02,
+ 777.87, 622.31, 518.59, 444.54,
+ 388.93, 311.16, 259.32, 222.27,
+ 194.47, 155.60, 129.66, 111.16,
+ 97.23, 77.82, 64.85, 55.60,
+ 48.62, 38.91, 32.43, 27.80,
+ 24.31, 19.46, 16.24, 13.92,
+ 12.15, 9.75, 8.12, 6.98,
+ 6.08, 4.90, 4.08, 3.49,
+ 3.04, 2.49, 2.13, 1.90,
+ 1.72, 1.41, 1.18, 1.04,
+ 0.91, 0.73, 0.59, 0.50,
+ 0.45, 0.45, 0.45, 0.45
+};
+
+const INT32 multipcm_device::VALUE_TO_CHANNEL[32] =
+{
+ 0, 1, 2, 3, 4, 5, 6 , -1,
+ 7, 8, 9, 10,11,12,13, -1,
+ 14,15,16,17,18,19,20, -1,
+ 21,22,23,24,25,26,27, -1,
+};
+
+const UINT32 multipcm_device::TL_SHIFT = 12;
+const UINT32 multipcm_device::EG_SHIFT = 16;
+
+INT32 multipcm_device::envelope_generator_update(slot_t *slot)
+{
+ switch(slot->m_envelope_gen.m_state)
+ {
+ case ATTACK:
+ slot->m_envelope_gen.m_volume += slot->m_envelope_gen.m_attack_rate;
+ if (slot->m_envelope_gen.m_volume >= (0x3ff << EG_SHIFT))
+ {
+ slot->m_envelope_gen.m_state = DECAY1;
+ if (slot->m_envelope_gen.m_decay1_rate >= (0x400 << EG_SHIFT)) //Skip DECAY1, go directly to DECAY2
+ {
+ slot->m_envelope_gen.m_state = DECAY2;
+ }
+ slot->m_envelope_gen.m_volume = 0x3ff << EG_SHIFT;
+ }
+ break;
+ case DECAY1:
+ slot->m_envelope_gen.m_volume -= slot->m_envelope_gen.m_decay1_rate;
+ if (slot->m_envelope_gen.m_volume <= 0)
+ {
+ slot->m_envelope_gen.m_volume = 0;
+ }
+ if (slot->m_envelope_gen.m_volume >> EG_SHIFT <= (slot->m_envelope_gen.m_decay_level << 6))
+ {
+ slot->m_envelope_gen.m_state = DECAY2;
+ }
+ break;
+ case DECAY2:
+ slot->m_envelope_gen.m_volume -= slot->m_envelope_gen.m_decay2_rate;
+ if (slot->m_envelope_gen.m_volume <= 0)
+ {
+ slot->m_envelope_gen.m_volume = 0;
+ }
+ break;
+ case RELEASE:
+ slot->m_envelope_gen.m_volume -= slot->m_envelope_gen.m_release_rate;
+ if (slot->m_envelope_gen.m_volume <= 0)
+ {
+ slot->m_envelope_gen.m_volume = 0;
+ slot->m_playing = false;
+ }
+ break;
+ default:
+ return 1 << TL_SHIFT;
+ }
+
+ return m_linear_to_exp_volume[slot->m_envelope_gen.m_volume >> EG_SHIFT];
+}
+
+UINT32 multipcm_device::get_rate(UINT32 *steps, UINT32 rate, UINT32 val)
+{
+ INT32 r = 4 * val + rate;
+ if (val == 0)
+ {
+ return steps[0];
+ }
+ if (val == 0xf)
+ {
+ return steps[0x3f];
+ }
+ if (r > 0x3f)
+ {
+ r = 0x3f;
+ }
+ return steps[r];
+}
+
+void multipcm_device::envelope_generator_calc(slot_t *slot)
+{
+ INT32 octave = ((slot->m_regs[3] >> 4) - 1) & 0xf;
+ if (octave & 8) {
+ octave = octave - 16;
+ }
+
+ INT32 rate;
+ if (slot->m_sample->m_key_rate_scale != 0xf)
+ {
+ rate = (octave + slot->m_sample->m_key_rate_scale) * 2 + ((slot->m_regs[3] >> 3) & 1);
+ }
+ else
+ {
+ rate = 0;
+ }
+
+ slot->m_envelope_gen.m_attack_rate = get_rate(m_attack_step, rate, slot->m_sample->m_attack_reg);
+ slot->m_envelope_gen.m_decay1_rate = get_rate(m_decay_release_step, rate, slot->m_sample->m_decay1_reg);
+ slot->m_envelope_gen.m_decay2_rate = get_rate(m_decay_release_step, rate, slot->m_sample->m_decay2_reg);
+ slot->m_envelope_gen.m_release_rate = get_rate(m_decay_release_step, rate, slot->m_sample->m_release_reg);
+ slot->m_envelope_gen.m_decay_level = 0xf - slot->m_sample->m_decay_level;
+
+}
+
+/*****************************
+ LFO SECTION
+*****************************/
+
+const UINT32 multipcm_device::LFO_SHIFT = 8;
+
+const float multipcm_device::LFO_FREQ[8] = // In Hertz
+{
+ 0.168f,
+ 2.019f,
+ 3.196f,
+ 4.206f,
+ 5.215f,
+ 5.888f,
+ 6.224f,
+ 7.066f
+};
+
+const float multipcm_device::PHASE_SCALE_LIMIT[8] = // In Cents
+{
+ 0.0f,
+ 3.378f,
+ 5.065f,
+ 6.750f,
+ 10.114f,
+ 20.170f,
+ 40.180f,
+ 79.307f
+};
+
+const float multipcm_device::AMPLITUDE_SCALE_LIMIT[8] = // In Decibels
+{
+ 0.0f,
+ 0.4f,
+ 0.8f,
+ 1.5f,
+ 3.0f,
+ 6.0f,
+ 12.0f,
+ 24.0f
+};
+
+void multipcm_device::lfo_init()
+{
+ m_pitch_table = auto_alloc_array_clear(machine(), INT32, 256);
+ m_amplitude_table = auto_alloc_array_clear(machine(), INT32, 256);
+ for (INT32 i = 0; i < 256; ++i)
+ {
+ if (i < 64)
+ {
+ m_pitch_table[i] = i * 2 + 128;
+ }
+ else if (i < 128)
+ {
+ m_pitch_table[i] = 383 - i * 2;
+ }
+ else if (i < 192)
+ {
+ m_pitch_table[i] = 384 - i * 2;
+ }
+ else
+ {
+ m_pitch_table[i] = i * 2 - 383;
+ }
+
+ if (i < 128)
+ {
+ m_amplitude_table[i] = 255 - (i * 2);
+ }
+ else
+ {
+ m_amplitude_table[i] = (i * 2) - 256;
+ }
+ }
+
+ m_pitch_scale_tables = auto_alloc_array_clear(machine(), INT32*, 8);
+ m_amplitude_scale_tables = auto_alloc_array_clear(machine(), INT32*, 8);
+ for (INT32 table = 0; table < 8; ++table)
+ {
+ float limit = PHASE_SCALE_LIMIT[table];
+ m_pitch_scale_tables[table] = auto_alloc_array_clear(machine(), INT32, 256);
+ for(INT32 i = -128; i < 128; ++i)
+ {
+ const float value = (limit * (float)i) / 128.0f;
+ const float converted = powf(2.0f, value / 1200.0f);
+ m_pitch_scale_tables[table][i + 128] = value_to_fixed(LFO_SHIFT, converted);
+ }
+
+ limit = -AMPLITUDE_SCALE_LIMIT[table];
+ m_amplitude_scale_tables[table] = auto_alloc_array_clear(machine(), INT32, 256);
+ for(INT32 i = 0; i < 256; ++i)
+ {
+ const float value = (limit * (float)i) / 256.0f;
+ const float converted = powf(10.0f, value / 20.0f);
+ m_amplitude_scale_tables[table][i] = value_to_fixed(LFO_SHIFT, converted);
+ }
+ }
+}
+
+UINT32 multipcm_device::value_to_fixed(const UINT32 bits, const float value)
+{
+ const float float_shift = (float)(1 << bits);
+ return (UINT32)(float_shift * value);
+}
+
+INT32 multipcm_device::pitch_lfo_step(lfo_t *lfo)
+{
+ lfo->m_phase += lfo->m_phase_step;
+ INT32 p = lfo->m_table[(lfo->m_phase >> LFO_SHIFT) & 0xff];
+ p = lfo->m_scale[p];
+ return p << (TL_SHIFT - LFO_SHIFT);
+}
+
+INT32 multipcm_device::amplitude_lfo_step(lfo_t *lfo)
+{
+ lfo->m_phase += lfo->m_phase_step;
+ INT32 p = lfo->m_table[(lfo->m_phase >> LFO_SHIFT) & 0xff];
+ p = lfo->m_scale[p];
+ return p << (TL_SHIFT - LFO_SHIFT);
+}
+
+void multipcm_device::lfo_compute_step(lfo_t *lfo, UINT32 lfo_frequency, UINT32 lfo_scale, INT32 amplitude_lfo)
+{
+ float step = (float)LFO_FREQ[lfo_frequency] * 256.0f / (float)m_rate;
+ lfo->m_phase_step = (UINT32)((float)(1 << LFO_SHIFT) * step);
+ if (amplitude_lfo)
+ {
+ lfo->m_table = m_amplitude_table;
+ lfo->m_scale = m_amplitude_scale_tables[lfo_scale];
+ }
+ else
+ {
+ lfo->m_table = m_pitch_table;
+ lfo->m_scale = m_pitch_scale_tables[lfo_scale];
+ }
+}
+
+void multipcm_device::write_slot(slot_t *slot, INT32 reg, UINT8 data)
+{
+ slot->m_regs[reg] = data;
+
+ switch(reg)
+ {
+ case 0: // PANPOT
+ slot->m_pan = (data >> 4) & 0xf;
+ break;
+ case 1: // Sample
+ {
+ //according to YMF278 sample write causes some base params written to the regs (envelope+lfos)
+ //the game should never change the sample while playing.
+ sample_t *sample = m_samples + slot->m_regs[1];
+ write_slot(slot, 6, sample->m_lfo_vibrato_reg);
+ write_slot(slot, 7, sample->m_lfo_amplitude_reg);
+ break;
+ }
+ case 2: //Pitch
+ case 3:
+ {
+ UINT32 oct = ((slot->m_regs[3] >> 4) - 1) & 0xf;
+ UINT32 pitch = ((slot->m_regs[3] & 0xf) << 6) | (slot->m_regs[2] >> 2);
+ pitch = m_freq_step_table[pitch];
+ if (oct & 0x8)
+ {
+ pitch >>= (16 - oct);
+ }
+ else
+ {
+ pitch <<= oct;
+ }
+ slot->m_step = pitch / m_rate;
+ }
+ break;
+ case 4: //KeyOn/Off (and more?)
+ if (data & 0x80) //KeyOn
+ {
+ slot->m_sample = m_samples + slot->m_regs[1];
+ slot->m_playing = true;
+ slot->m_base = slot->m_sample->m_start;
+ slot->m_offset = 0;
+ slot->m_prev_sample = 0;
+ slot->m_total_level = slot->m_dest_total_level << TL_SHIFT;
+
+ envelope_generator_calc(slot);
+ slot->m_envelope_gen.m_state = ATTACK;
+ slot->m_envelope_gen.m_volume = 0;
+
+ if (slot->m_base >= 0x100000)
+ {
+ if (slot->m_pan & 8)
+ {
+ slot->m_base = (slot->m_base & 0xfffff) | m_bank_left;
+ }
+ else
+ {
+ slot->m_base = (slot->m_base & 0xfffff) | m_bank_right;
+ }
+ }
+
+ }
+ else
+ {
+ if (slot->m_playing)
+ {
+ if (slot->m_sample->m_release_reg != 0xf)
+ {
+ slot->m_envelope_gen.m_state = RELEASE;
+ }
+ else
+ {
+ slot->m_playing = false;
+ }
+ }
+ }
+ break;
+ case 5: // TL + Interpolation
+ slot->m_dest_total_level = (data >> 1) & 0x7f;
+ if (!(data & 1)) //Interpolate TL
+ {
+ if ((slot->m_total_level >> TL_SHIFT) > slot->m_dest_total_level)
+ {
+ slot->m_total_level_step = m_total_level_steps[0]; // decrease
+ }
+ else
+ {
+ slot->m_total_level_step = m_total_level_steps[1]; // increase
+ }
+ }
+ else
+ {
+ slot->m_total_level = slot->m_dest_total_level << TL_SHIFT;
+ }
+ break;
+ case 6: // LFO frequency + Pitch LFO
+ if (data)
+ {
+ lfo_compute_step(&(slot->m_pitch_lfo), (slot->m_regs[6] >> 3) & 7, slot->m_regs[6] & 7, 0);
+ lfo_compute_step(&(slot->m_amplitude_lfo), (slot->m_regs[6] >> 3) & 7, slot->m_regs[7] & 7, 1);
+ }
+ break;
+ case 7: // Amplitude LFO
+ if (data)
+ {
+ lfo_compute_step(&(slot->m_pitch_lfo), (slot->m_regs[6] >> 3) & 7, slot->m_regs[6] & 7, 0);
+ lfo_compute_step(&(slot->m_amplitude_lfo), (slot->m_regs[6] >> 3) & 7, slot->m_regs[7] & 7, 1);
+ }
+ break;
+ }
+}
+
+READ8_MEMBER( multipcm_device::read )
+{
+ return 0;
+}
+
+
+WRITE8_MEMBER( multipcm_device::write )
+{
+ switch(offset)
+ {
+ case 0: //Data write
+ write_slot(m_slots + m_cur_slot, m_address, data);
+ break;
+ case 1:
+ m_cur_slot = VALUE_TO_CHANNEL[data & 0x1f];
+ break;
+
+ case 2:
+ m_address = (data > 7) ? 7 : data;
+ break;
+ }
+}
+
+/* MAME/M1 access functions */
+
+void multipcm_device::set_bank(UINT32 leftoffs, UINT32 rightoffs)
+{
+ m_bank_left = leftoffs;
+ m_bank_right = rightoffs;
+}
+
+const device_type MULTIPCM = &device_creator<multipcm_device>;
+
+// default address map
+static ADDRESS_MAP_START( multipcm, AS_0, 8, multipcm_device )
+ AM_RANGE(0x000000, 0x3fffff) AM_ROM
+ADDRESS_MAP_END
+
+multipcm_device::multipcm_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, MULTIPCM, "Sega/Yamaha 315-5560", tag, owner, clock, "multipcm", __FILE__),
+ device_sound_interface(mconfig, *this),
+ device_memory_interface(mconfig, *this),
+ m_space_config("mpcm_samples", ENDIANNESS_LITTLE, 8, 24, 0, NULL),
+ m_stream(NULL),
+ m_samples(NULL),
+ m_slots(NULL),
+ m_cur_slot(0),
+ m_address(0),
+ m_bank_right(0),
+ m_bank_left(0),
+ m_rate(0),
+ m_attack_step(NULL),
+ m_decay_release_step(NULL),
+ m_freq_step_table(NULL),
+ m_direct(NULL),
+ m_left_pan_table(NULL),
+ m_right_pan_table(NULL),
+ m_linear_to_exp_volume(NULL),
+ m_total_level_steps(NULL),
+ m_pitch_scale_tables(NULL),
+ m_amplitude_scale_tables(NULL)
+{
+ m_address_map[0] = *ADDRESS_MAP_NAME(multipcm);
+}
+
+//-------------------------------------------------
+// memory_space_config - return a description of
+// any address spaces owned by this device
+//-------------------------------------------------
+
+const address_space_config *multipcm_device::memory_space_config(address_spacenum spacenum) const
+{
+ return (spacenum == 0) ? &m_space_config : NULL;
+}
+
+//-------------------------------------------------
+// device_config_complete - perform any
+// operations now that the configuration is
+// complete
+//-------------------------------------------------
+
+void multipcm_device::device_config_complete()
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void multipcm_device::device_start()
+{
+ // find our direct access
+ m_direct = &space().direct();
+
+ const float clock_divider = 180.0f;
+ m_rate = (float)clock() / clock_divider;
+
+ m_stream = machine().sound().stream_alloc(*this, 0, 2, m_rate);
+
+ // Volume + pan table
+ m_left_pan_table = auto_alloc_array_clear(machine(), INT32, 0x800);
+ m_right_pan_table = auto_alloc_array_clear(machine(), INT32, 0x800);
+ for (INT32 level = 0; level < 0x80; ++level)
+ {
+ const float vol_db = (float)level * (-24.0f) / 64.0f;
+ const float total_level = powf(10.0f, vol_db / 20.0f) / 4.0f;
+
+ for (INT32 pan = 0; pan < 0x10; ++pan)
+ {
+ float pan_left, pan_right;
+ if (pan == 0x8)
+ {
+ pan_left = 0.0;
+ pan_right = 0.0;
+ }
+ else if (pan == 0x0)
+ {
+ pan_left = 1.0;
+ pan_right = 1.0;
+ }
+ else if (pan & 0x8)
+ {
+ pan_left = 1.0;
+
+ const INT32 inverted_pan = 0x10 - pan;
+ const float pan_vol_db = (float)inverted_pan * (-12.0f) / 4.0f;
+
+ pan_right = pow(10.0f, pan_vol_db / 20.0f);
+
+ if ((inverted_pan & 0x7) == 7)
+ {
+ pan_right = 0.0;
+ }
+ }
+ else
+ {
+ pan_right = 1.0;
+
+ const float pan_vol_db = (float)pan * (-12.0f) / 4.0f;
+
+ pan_left = pow(10.0f, pan_vol_db / 20.0f);
+
+ if ((pan & 0x7) == 7)
+ {
+ pan_left = 0.0;
+ }
+ }
+
+ m_left_pan_table[(pan << 7) | level] = value_to_fixed(TL_SHIFT, pan_left * total_level);
+ m_right_pan_table[(pan << 7) | level] = value_to_fixed(TL_SHIFT, pan_right * total_level);
+ }
+ }
+
+ //Pitch steps
+ m_freq_step_table = auto_alloc_array_clear(machine(), UINT32, 0x400);
+ for (INT32 i = 0; i < 0x400; ++i)
+ {
+ const float fcent = m_rate * (1024.0f + (float)i) / 1024.0f;
+ m_freq_step_table[i] = value_to_fixed(TL_SHIFT, fcent);
+ }
+
+ // Envelope steps
+ m_attack_step = auto_alloc_array_clear(machine(), UINT32, 0x40);
+ m_decay_release_step = auto_alloc_array_clear(machine(), UINT32, 0x40);
+ const double attack_rate_to_decay_rate = 14.32833;
+ for (INT32 i = 0; i < 0x40; ++i)
+ {
+ // Times are based on 44100Hz clock, adjust to real chip clock
+ m_attack_step[i] = (float)(0x400 << EG_SHIFT) / (float)(BASE_TIMES[i] * 44100.0 / 1000.0);
+ m_decay_release_step[i] = (float)(0x400 << EG_SHIFT) / (float)(BASE_TIMES[i] * attack_rate_to_decay_rate * 44100.0 / 1000.0);
+ }
+ m_attack_step[0] = m_attack_step[1] = m_attack_step[2] = m_attack_step[3] = 0;
+ m_attack_step[0x3f] = 0x400 << EG_SHIFT;
+ m_decay_release_step[0] = m_decay_release_step[1] = m_decay_release_step[2] = m_decay_release_step[3] = 0;
+
+ // Total level interpolation steps
+ m_total_level_steps = auto_alloc_array_clear(machine(), INT32, 2);
+ m_total_level_steps[0] = -(float)(0x80 << TL_SHIFT) / (78.2f * 44100.0f / 1000.0f); // lower
+ m_total_level_steps[1] = (float)(0x80 << TL_SHIFT) / (78.2f * 2 * 44100.0f / 1000.0f); // raise
+
+ // build the linear->exponential ramps
+ m_linear_to_exp_volume = auto_alloc_array_clear(machine(), INT32, 0x400);
+ for(INT32 i = 0; i < 0x400; ++i)
+ {
+ const float db = -(96.0f - (96.0f * (float)i / (float)0x400));
+ const float exp_volume = powf(10.0f, db / 20.0f);
+ m_linear_to_exp_volume[i] = value_to_fixed(TL_SHIFT, exp_volume);
+ }
+
+ // Samples
+ m_samples = auto_alloc_array_clear(machine(), sample_t, 0x200);
+ for(INT32 sample = 0; sample < 0x200; ++sample)
+ {
+ UINT8 data[12];
+
+ for (INT32 sample_byte = 0; sample_byte < 12; sample_byte++)
+ {
+ data[sample_byte] = (UINT8)m_direct->read_byte((sample * 12) + sample_byte);
+ }
+
+ m_samples[sample].m_start = (data[0] << 16) | (data[1] << 8) | (data[2] << 0);
+ m_samples[sample].m_loop = (data[3] << 8) | (data[4] << 0);
+ m_samples[sample].m_end = 0xffff - ((data[5] << 8) | (data[6] << 0));
+ m_samples[sample].m_lfo_vibrato_reg = data[7];
+ m_samples[sample].m_decay1_reg = data[8] & 0xf;
+ m_samples[sample].m_attack_reg = (data[8] >> 4) & 0xf;
+ m_samples[sample].m_decay2_reg = data[9] & 0xf;
+ m_samples[sample].m_decay_level = (data[9] >> 4) & 0xf;
+ m_samples[sample].m_release_reg = data[10] & 0xf;
+ m_samples[sample].m_key_rate_scale = (data[10] >> 4) & 0xf;
+ m_samples[sample].m_lfo_amplitude_reg = data[11];
+ }
+
+ save_item(NAME(m_cur_slot));
+ save_item(NAME(m_address));
+ save_item(NAME(m_bank_left));
+ save_item(NAME(m_bank_right));
+
+ // Slots
+ m_slots = auto_alloc_array_clear(machine(), slot_t, 28);
+ for (INT32 slot = 0; slot < 28; ++slot)
+ {
+ m_slots[slot].m_slot_index = slot;
+ m_slots[slot].m_playing = false;
+
+ save_item(NAME(m_slots[slot].m_slot_index), slot);
+ save_item(NAME(m_slots[slot].m_regs), slot);
+ save_item(NAME(m_slots[slot].m_playing), slot);
+ save_item(NAME(m_slots[slot].m_base), slot);
+ save_item(NAME(m_slots[slot].m_offset), slot);
+ save_item(NAME(m_slots[slot].m_step), slot);
+ save_item(NAME(m_slots[slot].m_pan), slot);
+ save_item(NAME(m_slots[slot].m_total_level), slot);
+ save_item(NAME(m_slots[slot].m_dest_total_level), slot);
+ save_item(NAME(m_slots[slot].m_total_level_step), slot);
+ save_item(NAME(m_slots[slot].m_prev_sample), slot);
+ save_item(NAME(m_slots[slot].m_envelope_gen.m_volume), slot);
+ save_item(NAME(m_slots[slot].m_envelope_gen.m_state), slot);
+ save_item(NAME(m_slots[slot].m_envelope_gen.step), slot);
+ save_item(NAME(m_slots[slot].m_envelope_gen.m_attack_rate), slot);
+ save_item(NAME(m_slots[slot].m_envelope_gen.m_decay1_rate), slot);
+ save_item(NAME(m_slots[slot].m_envelope_gen.m_decay2_rate), slot);
+ save_item(NAME(m_slots[slot].m_envelope_gen.m_release_rate), slot);
+ save_item(NAME(m_slots[slot].m_envelope_gen.m_decay_level), slot);
+ save_item(NAME(m_slots[slot].m_pitch_lfo.m_phase), slot);
+ save_item(NAME(m_slots[slot].m_pitch_lfo.m_phase_step), slot);
+ save_item(NAME(m_slots[slot].m_amplitude_lfo.m_phase), slot);
+ save_item(NAME(m_slots[slot].m_amplitude_lfo.m_phase_step), slot);
+ }
+
+ lfo_init();
+}
+
+//-----------------------------------------------------
+// clamp_to_int16 - clamp a 32-bit value to 16 bits
+//-----------------------------------------------------
+
+INT16 multipcm_device::clamp_to_int16(INT32 value)
+{
+ if (value < -32768)
+ {
+ return -32768;
+ }
+ else if (value > 32767)
+ {
+ return 32767;
+ }
+ return (INT16)value;
+}
+
+//-------------------------------------------------
+// sound_stream_update - handle a stream update
+//-------------------------------------------------
+
+void multipcm_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, INT32 samples)
+{
+ stream_sample_t *datap[2];
+
+ datap[0] = outputs[0];
+ datap[1] = outputs[1];
+
+ memset(datap[0], 0, sizeof(*datap[0]) * samples);
+ memset(datap[1], 0, sizeof(*datap[1]) * samples);
+
+ for (INT32 i = 0; i < samples; ++i)
+ {
+ INT32 smpl = 0;
+ INT32 smpr = 0;
+ for (INT32 sl = 0; sl < 28; ++sl)
+ {
+ slot_t *slot = m_slots + sl;
+ if (slot->m_playing)
+ {
+ UINT32 vol = (slot->m_total_level >> TL_SHIFT) | (slot->m_pan << 7);
+ UINT32 adr = slot->m_offset >> TL_SHIFT;
+ UINT32 step = slot->m_step;
+ INT32 csample = (INT16) (m_direct->read_byte(slot->m_base + adr) << 8);
+ INT32 fpart = slot->m_offset & ((1 << TL_SHIFT) - 1);
+ INT32 sample = (csample * fpart + slot->m_prev_sample * ((1 << TL_SHIFT) - fpart)) >> TL_SHIFT;
+
+ if (slot->m_regs[6] & 7) // Vibrato enabled
+ {
+ step = step * pitch_lfo_step(&(slot->m_pitch_lfo));
+ step >>= TL_SHIFT;
+ }
+
+ slot->m_offset += step;
+ if (slot->m_offset >= (slot->m_sample->m_end << TL_SHIFT))
+ {
+ slot->m_offset = slot->m_sample->m_loop << TL_SHIFT;
+ }
+
+ if (adr ^ (slot->m_offset >> TL_SHIFT))
+ {
+ slot->m_prev_sample = csample;
+ }
+
+ if ((slot->m_total_level >> TL_SHIFT) != slot->m_dest_total_level)
+ {
+ slot->m_total_level += slot->m_total_level_step;
+ }
+
+ if (slot->m_regs[7] & 7) // Tremolo enabled
+ {
+ sample = sample * amplitude_lfo_step(&(slot->m_amplitude_lfo));
+ sample >>= TL_SHIFT;
+ }
+
+ sample = (sample * envelope_generator_update(slot)) >> 10;
+
+ smpl += (m_left_pan_table[vol] * sample) >> TL_SHIFT;
+ smpr += (m_right_pan_table[vol] * sample) >> TL_SHIFT;
+ }
+ }
+
+ datap[0][i] = clamp_to_int16(smpl);
+ datap[1][i] = clamp_to_int16(smpr);
+ }
+}