diff options
Diffstat (limited to 'src/devices/sound/swx00.cpp')
-rw-r--r-- | src/devices/sound/swx00.cpp | 721 |
1 files changed, 721 insertions, 0 deletions
diff --git a/src/devices/sound/swx00.cpp b/src/devices/sound/swx00.cpp new file mode 100644 index 00000000000..4643e8e5058 --- /dev/null +++ b/src/devices/sound/swx00.cpp @@ -0,0 +1,721 @@ +// license:BSD-3-Clause +// copyright-holders:Olivier Galibert + +// Yamaha SWX00, rompler/dsp/cpu combo, audio support + +#include "emu.h" +#include "swx00.h" + + +DEFINE_DEVICE_TYPE(SWX00_SOUND, swx00_sound_device, "swx00_sound", "Yamaha SWX00 (sound subsystem)") + +// Some tables we need. Lifted from the swp00, probably incorrect. + +const std::array<s32, 0x80> swx00_sound_device::attack_linear_step = { + 0x00027, 0x0002b, 0x0002f, 0x00033, 0x00037, 0x0003d, 0x00042, 0x00048, + 0x0004d, 0x00056, 0x0005e, 0x00066, 0x0006f, 0x0007a, 0x00085, 0x00090, + 0x0009b, 0x000ac, 0x000bd, 0x000cc, 0x000de, 0x000f4, 0x00109, 0x00120, + 0x00135, 0x00158, 0x00179, 0x00199, 0x001bc, 0x001e7, 0x00214, 0x00240, + 0x0026b, 0x002af, 0x002f2, 0x00332, 0x00377, 0x003d0, 0x0042c, 0x00480, + 0x004dc, 0x0055e, 0x005e9, 0x0066e, 0x006f4, 0x007a4, 0x00857, 0x0090b, + 0x009c3, 0x00acb, 0x00bd6, 0x00ce6, 0x00e00, 0x00f5e, 0x010d2, 0x01234, + 0x0139e, 0x015d0, 0x017f3, 0x01a20, 0x01c4a, 0x01f52, 0x02232, 0x0250f, + 0x027ff, 0x02c72, 0x03109, 0x0338b, 0x039c4, 0x04038, 0x04648, 0x04c84, + 0x05262, 0x05c1c, 0x065af, 0x06f5c, 0x07895, 0x0866f, 0x09470, 0x0a19e, + 0x0ae4c, 0x0c566, 0x0db8d, 0x0f00f, 0x10625, 0x12937, 0x14954, 0x16c17, + 0x1886e, 0x1c71c, 0x20000, 0x239e1, 0x2647c, 0x2aaab, 0x2ecfc, 0x3241f, + 0x35e51, 0x3a83b, 0x40000, 0x4325c, 0x47dc1, 0x4c8f9, 0x50505, 0x55555, + 0x58160, 0x5d174, 0x60606, 0x62b2e, 0x67b24, 0x6a63c, 0x6d3a0, 0x6eb3e, + 0x71c72, 0x73616, 0x75075, 0x76b98, 0x78788, 0x78788, 0x7a44c, 0x7a44c, + 0x7a44c, 0x7a44c, 0x7a44c, 0x7a44c, 0x7a44c, 0x7a44c, 0x7a44c, 0x7a44c, +}; + +const std::array<s32, 0x20> swx00_sound_device::decay_linear_step = { + 0x15083, 0x17ad2, 0x1a41a, 0x1cbe7, 0x1f16d, 0x22ef1, 0x26a44, 0x2a1e4, + 0x2da35, 0x34034, 0x3a197, 0x40000, 0x45b82, 0x4b809, 0x51833, 0x57262, + 0x5d9f7, 0x6483f, 0x6b15c, 0x71c72, 0x77976, 0x7d119, 0x83127, 0x88889, + 0x8d3dd, 0x939a8, 0x991f2, 0x9d89e, 0xa0a0a, 0xa57eb, 0xa72f0, 0xac769, +}; + +const std::array<s32, 16> swx00_sound_device::panmap = { + 0x000, 0x040, 0x080, 0x0c0, + 0x100, 0x140, 0x180, 0x1c0, + 0x200, 0x240, 0x280, 0x2c0, + 0x300, 0x340, 0x380, 0xfff +}; + +const std::array<u8, 4> swx00_sound_device::dpcm_offset = { 7, 6, 4, 0 }; + +swx00_sound_device::swx00_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, SWX00_SOUND, tag, owner, clock), + device_sound_interface(mconfig, *this), + device_rom_interface(mconfig, *this) +{ +} + +void swx00_sound_device::device_add_mconfig(machine_config &config) +{ +} + +void swx00_sound_device::device_start() +{ + m_stream = stream_alloc(0, 2, 44100); + + save_item(NAME(m_sample_start)); + save_item(NAME(m_sample_end)); + save_item(NAME(m_sample_address)); + + save_item(NAME(m_glo_pan)); + save_item(NAME(m_rev_dry)); + save_item(NAME(m_cho_var)); + + save_item(NAME(m_attack)); + save_item(NAME(m_decay)); + + save_item(NAME(m_keyon)); + save_item(NAME(m_state_sel)); + + save_item(NAME(m_dsp_offsets)); + save_item(NAME(m_dsp_values)); + + save_item(NAME(m_rom_address)); + save_item(NAME(m_rom_read_status)); + + save_item(NAME(m_sample_pos)); + save_item(NAME(m_envelope_level)); + + save_item(NAME(m_glo_level_cur)); + save_item(NAME(m_pan_l)); + save_item(NAME(m_pan_r)); + + save_item(NAME(m_active)); + save_item(NAME(m_decay_on)); + save_item(NAME(m_decay_done)); + + save_item(NAME(m_dpcm_current)); + save_item(NAME(m_dpcm_next)); + save_item(NAME(m_dpcm_address)); + save_item(NAME(m_dpcm_sum)); + + + for(int i=0; i != 128; i++) { + u32 v = 0; + switch(i >> 3) { + default: v = ((i & 7) + 8) << (1 + (i >> 3)); break; + case 0xb: v = ((i & 7) + 4) << 13; break; + case 0xc: v = ((i & 6) + 6) << 14; break; + case 0xd: v = ((i & 4) + 7) << 15; break; + case 0xe: v = 15 << 15; break; + case 0xf: v = 31 << 15; break; + } + m_global_step[i] = v; + } + + // Delta-packed samples decompression. + + for(int i=0; i<128; i++) { + s16 base = ((i & 0x1f) << (3+(i >> 5))) + (((1 << (i >> 5))-1) << 8); + m_dpcm[i | 0x80] = - base; + m_dpcm[i] = + base; + } +} + +void swx00_sound_device::device_reset() +{ + std::fill(m_sample_start.begin(), m_sample_start.end(), 0); + std::fill(m_sample_end.begin(), m_sample_end.end(), 0); + std::fill(m_sample_address.begin(), m_sample_address.end(), 0); + + std::fill(m_glo_pan.begin(), m_glo_pan.end(), 0); + std::fill(m_rev_dry.begin(), m_rev_dry.end(), 0); + std::fill(m_cho_var.begin(), m_cho_var.end(), 0); + + std::fill(m_attack.begin(), m_attack.end(), 0); + std::fill(m_decay.begin(), m_decay.end(), 0); + + std::fill(m_dsp_offsets.begin(), m_dsp_offsets.end(), 0); + std::fill(m_dsp_values.begin(), m_dsp_values.end(), 0); + + std::fill(m_sample_pos.begin(), m_sample_pos.end(), 0); + std::fill(m_envelope_level.begin(), m_envelope_level.end(), 0); + + std::fill(m_glo_level_cur.begin(), m_glo_level_cur.end(), 0); + std::fill(m_pan_l.begin(), m_pan_l.end(), 0); + std::fill(m_pan_r.begin(), m_pan_r.end(), 0); + + std::fill(m_active.begin(), m_active.end(), false); + std::fill(m_decay_on.begin(), m_decay_on.end(), false); + std::fill(m_decay_done.begin(), m_decay_done.end(), false); + + std::fill(m_dpcm_current.begin(), m_dpcm_current.end(), false); + std::fill(m_dpcm_next.begin(), m_dpcm_next.end(), false); + std::fill(m_dpcm_address.begin(), m_dpcm_address.end(), false); + std::fill(m_dpcm_sum.begin(), m_dpcm_sum.end(), 0); + + m_keyon = 0; + m_state_sel = 0; + m_rom_address = 0; + m_rom_read_status = 0; +} + +void swx00_sound_device::map(address_map &map) +{ + map(0x000, 0x7ff).rw(FUNC(swx00_sound_device::snd_r), FUNC(swx00_sound_device::snd_w)); + + map(0x001, 0x001).rw(FUNC(swx00_sound_device::state_r), FUNC(swx00_sound_device::state_sel_w)); + + map(0x008, 0x00b).w(FUNC(swx00_sound_device::keyon_w)); + map(0x00c, 0x00c).w(FUNC(swx00_sound_device::keyon_commit_w)); + + map(0x110, 0x110).w(FUNC(swx00_sound_device::dsp_offh_w)); + map(0x120, 0x120).w(FUNC(swx00_sound_device::dsp_valh_w)); + + rchan(map, 0x05).rw(FUNC(swx00_sound_device::sample_start_r), FUNC(swx00_sound_device::sample_start_w)); + + map(0x180, 0x1ff).w(FUNC(swx00_sound_device::dsp_offl_w)); + map(0x200, 0x31f).w(FUNC(swx00_sound_device::dsp_vall_w)); // 06-0b + + rchan(map, 0x13).rw(FUNC(swx00_sound_device::glo_pan_r), FUNC(swx00_sound_device::glo_pan_w)); + rchan(map, 0x14).rw(FUNC(swx00_sound_device::attack_r), FUNC(swx00_sound_device::attack_w)); + rchan(map, 0x15).rw(FUNC(swx00_sound_device::decay_r), FUNC(swx00_sound_device::decay_w)); + rchan(map, 0x16).rw(FUNC(swx00_sound_device::rev_dry_r), FUNC(swx00_sound_device::rev_dry_w)); + rchan(map, 0x17).rw(FUNC(swx00_sound_device::cho_var_r), FUNC(swx00_sound_device::cho_var_w)); + rchan(map, 0x18).rw(FUNC(swx00_sound_device::sample_address_h_r), FUNC(swx00_sound_device::sample_address_h_w)); + rchan(map, 0x19).rw(FUNC(swx00_sound_device::sample_address_l_r), FUNC(swx00_sound_device::sample_address_l_w)); + rchan(map, 0x1a).rw(FUNC(swx00_sound_device::sample_pitch_r), FUNC(swx00_sound_device::sample_pitch_w)); + rchan(map, 0x1b).rw(FUNC(swx00_sound_device::sample_end_r), FUNC(swx00_sound_device::sample_end_w)); + + map(0x808, 0x809).w(FUNC(swx00_sound_device::rom_read_adrh_w)); + map(0x80a, 0x80b).w(FUNC(swx00_sound_device::rom_read_adrl_w)); + map(0x80c, 0x80d).r(FUNC(swx00_sound_device::rom_read_status_r)); + map(0x80e, 0x80f).rw(FUNC(swx00_sound_device::rom_read_r), FUNC(swx00_sound_device::rom_read_w)); +} + +u16 swx00_sound_device::snd_r(offs_t offset) +{ + u32 chan = offset & 0x1f; + u32 slot = offset >> 5; + logerror("snd_r %03x %02x.%02x\n", offset*2, chan, slot); + return 0; +} + +void swx00_sound_device::snd_w(offs_t offset, u16 data, u16 mem_mask) +{ + u32 chan = offset & 0x1f; + u32 slot = offset >> 5; + if(slot == 0x10 || slot == 0x11) + return; + logerror("snd_w %03x %02x.%02x %04x @ %04x\n", offset*2, chan, slot, data, mem_mask); +} + +void swx00_sound_device::rom_read_adrh_w(offs_t, u16 data, u16 mem_mask) +{ + m_rom_address = (m_rom_address & ~(mem_mask << 16)) | ((data & mem_mask) << 16); +} + +void swx00_sound_device::rom_read_adrl_w(offs_t, u16 data, u16 mem_mask) +{ + m_rom_address = (m_rom_address & ~mem_mask) | (data & mem_mask); + m_rom_read_status = 1; +} + +u16 swx00_sound_device::rom_read_status_r() +{ + return m_rom_read_status; +} + +u16 swx00_sound_device::rom_read_r() +{ + m_rom_read_status = 0; + return read_word(m_rom_address); +} + +void swx00_sound_device::rom_read_w(u16) +{ + m_rom_read_status = 0; +} + +u16 swx00_sound_device::sample_start_r(offs_t chan) +{ + return m_sample_start[chan]; +} + +void swx00_sound_device::sample_start_w(offs_t chan, u16 data, u16 mem_mask) +{ + COMBINE_DATA(&m_sample_start[chan]); + if(ACCESSING_BITS_0_7) + logerror("sample_start[%02x] = %04x\n", chan, m_sample_start[chan]); +} + +u16 swx00_sound_device::sample_end_r(offs_t chan) +{ + return m_sample_end[chan]; +} + +void swx00_sound_device::sample_end_w(offs_t chan, u16 data, u16 mem_mask) +{ + COMBINE_DATA(&m_sample_end[chan]); + if(ACCESSING_BITS_0_7) + logerror("sample_end[%02x] = %04x\n", chan, m_sample_end[chan]); +} + +u16 swx00_sound_device::sample_pitch_r(offs_t chan) +{ + return m_sample_pitch[chan]; +} + +void swx00_sound_device::sample_pitch_w(offs_t chan, u16 data, u16 mem_mask) +{ + u16 old = m_sample_pitch[chan]; + COMBINE_DATA(&m_sample_pitch[chan]); + if(ACCESSING_BITS_0_7 && m_sample_pitch[chan] != old) + logerror("sample_pitch[%02x] = %04x\n", chan, m_sample_pitch[chan]); +} + +u16 swx00_sound_device::sample_address_h_r(offs_t chan) +{ + return m_sample_address[chan] >> 16; +} + +u16 swx00_sound_device::sample_address_l_r(offs_t chan) +{ + return m_sample_address[chan]; +} + +void swx00_sound_device::sample_address_h_w(offs_t chan, u16 data, u16 mem_mask) +{ + m_sample_address[chan] = (m_sample_address[chan] & ~(mem_mask << 16)) | ((data & mem_mask) << 16); +} + +void swx00_sound_device::sample_address_l_w(offs_t chan, u16 data, u16 mem_mask) +{ + m_sample_address[chan] = (m_sample_address[chan] & ~mem_mask) | (data & mem_mask); + if(ACCESSING_BITS_0_7) + logerror("sample_address[%02x] = %08x\n", chan, m_sample_address[chan]); +} + +u16 swx00_sound_device::glo_pan_r(offs_t chan) +{ + return m_glo_pan[chan]; +} + +void swx00_sound_device::glo_pan_w(offs_t chan, u16 data, u16 mem_mask) +{ + COMBINE_DATA(&m_glo_pan[chan]); + logerror("%02x: glo=%02x panl=%x panr=%x\n", chan, m_glo_pan[chan] >> 8, (m_glo_pan[chan] >> 4) & 0xf, m_glo_pan[chan] & 0xf); +} + +u16 swx00_sound_device::rev_dry_r(offs_t chan) +{ + return m_rev_dry[chan]; +} + +void swx00_sound_device::rev_dry_w(offs_t chan, u16 data, u16 mem_mask) +{ + COMBINE_DATA(&m_rev_dry[chan]); + logerror("%02x: rev=%02x dry=%02x\n", chan, m_rev_dry[chan] >> 8, m_rev_dry[chan] & 0xff); +} + +u16 swx00_sound_device::cho_var_r(offs_t chan) +{ + return m_cho_var[chan]; +} + +void swx00_sound_device::cho_var_w(offs_t chan, u16 data, u16 mem_mask) +{ + COMBINE_DATA(&m_cho_var[chan]); + logerror("%02x: cho=%02x var=%02x\n", chan, m_cho_var[chan] >> 8, m_cho_var[chan] & 0xff); +} + +void swx00_sound_device::keyon_w(offs_t offset, u8 data) +{ + u32 shift = 24 - 8*offset; + m_keyon = (m_keyon & ~(0xff << shift)) | (data << shift); +} + +void swx00_sound_device::keyon_commit_w(u8) +{ + m_stream->update(); + for(int chan = 0; chan != 32; chan++) + if(BIT(m_keyon, chan)) { + logerror("keyon %02x\n", chan); + m_sample_pos[chan] = -m_sample_start[chan] << 15; + + m_sample_pos[chan] = 0; + + m_active[chan] = true; + m_decay_on[chan] = false; + m_decay_done[chan] = false; + + m_dpcm_current[chan] = 0; + m_dpcm_next[chan] = 0; + m_dpcm_address[chan] = ((m_sample_address[chan] & 0xffffff) << 1) - m_sample_start[chan]; + m_dpcm_sum[chan] = 0; + + m_glo_level_cur[chan] = (m_glo_pan[chan] >> 4) & 0xff0; + m_pan_l[chan] = panmap[(m_glo_pan[chan] >> 4) & 15]; + m_pan_r[chan] = panmap[m_glo_pan[chan] & 15]; + + if(m_decay[chan] & 0x8000) { + m_envelope_level[chan] = 0; + m_decay_on[chan] = true; + } else if((m_attack[chan] & 0x8000) || (m_attack[chan] & 0xff)) + m_envelope_level[chan] = (m_attack[chan] & 0xff) << 20; + else + m_envelope_level[chan] = 0x8000000; + } + + m_keyon = 0; +} + +u16 swx00_sound_device::attack_r(offs_t chan) +{ + return m_attack[chan]; +} + +void swx00_sound_device::attack_w(offs_t chan, u16 data, u16 mem_mask) +{ + COMBINE_DATA(&m_attack[chan]); + if(ACCESSING_BITS_0_7) + logerror("%02x: attack %02x.%02x\n", chan, m_attack[chan] >> 8, m_attack[chan] & 0xff); +} + +u16 swx00_sound_device::decay_r(offs_t chan) +{ + return m_decay[chan]; +} + +void swx00_sound_device::decay_w(offs_t chan, u16 data, u16 mem_mask) +{ + COMBINE_DATA(&m_decay[chan]); + if(ACCESSING_BITS_0_7) + logerror("%02x: decay %02x.%02x\n", chan, m_decay[chan] >> 8, m_decay[chan] & 0xff); +} + +void swx00_sound_device::state_sel_w(u8 data) +{ + m_state_sel = data; +} + +u8 swx00_sound_device::state_r() +{ + int chan = m_state_sel & 0x1f; + switch(m_state_sel & 0xe0) { + case 0x40: { // Envelope state + if(!m_active[chan]) + return 0xff; + + u8 vol; + if(m_decay_on[chan] || (m_attack[chan] & 0x7f) || (m_attack[chan] & 0x8000)) + vol = m_envelope_level[chan] >> 22; + else + vol = 0; + + if(m_decay_done[chan]) + vol |= 0x40; + if(m_decay_on[chan]) + vol |= 0x80; + + return vol; + } + + default: + if(0) + logerror("state_r %02x\n", m_state_sel); + break; + } + return 0; +} + +void swx00_sound_device::dsp_valh_w(u8 data) +{ + m_dsp_valh = data; +} + +void swx00_sound_device::dsp_vall_w(offs_t reg, u8 data) +{ + m_dsp_values[reg] = ((m_dsp_valh << 8) | data) & 0x3ff; + // logerror("dsp value[%03x] = %03x\n", reg, m_dsp_values[reg]); +} + +void swx00_sound_device::dsp_offh_w(u8 data) +{ + m_dsp_offh = data; +} + +void swx00_sound_device::dsp_offl_w(offs_t reg, u8 data) +{ + if(reg & 1) { + m_dsp_offsets[reg >> 1] = (m_dsp_offh << 16) | (m_dsp_offsets[reg >> 1] & 0xff00) | data; + // logerror("dsp offset[%02x] = %06x\n", reg >> 1, m_dsp_offsets[reg >> 1]); + } else + m_dsp_offsets[reg >> 1] = (m_dsp_offh << 16) | (data << 8) | (m_dsp_offsets[reg >> 1] & 0xff); +} + +bool swx00_sound_device::istep(s32 &value, s32 limit, s32 step) +{ + // fprintf(stderr, "istep(%x, %x, %x)\n", value, limit, step); + if(value < limit) { + value += step; + if(value >= limit) { + value = limit; + return true; + } + return false; + } + + if(value > limit) { + value -= step; + if(value <= limit) { + value = limit; + return true; + } + return false; + } + + return true; +} + +s32 swx00_sound_device::fpadd(s32 value, s32 step) +{ + s32 e = value >> 24; + s32 m = value & 0xffffff; + + m += step << e; + if(m & 0xfe000000) + return 0xfffffff; + + while(m & 0x01000000) { + m <<= 1; + e ++; + } + if(e >= 16) + return 0xfffffff; + return (e << 24) | (m & 0xffffff); +} + +s32 swx00_sound_device::fpsub(s32 value, s32 step) +{ + s32 e = value >> 24; + s32 m = (value & 0xffffff) | 0xfe000000; + m = e < 0xc ? m - (step << e) : (m >> (e - 0xb)) - (step << 0xb); + if(m >= 0) + return 0; + if(e >= 0xc) + e = 0xb; + while(m < 0xfe000000) { + if(!e) + return 0; + e --; + m >>= 1; + } + while(e != 0xf && (m >= 0xff000000)) { + e ++; + m <<= 1; + } + + return (e << 24) | (m & 0xffffff); +} + +bool swx00_sound_device::fpstep(s32 &value, s32 limit, s32 step) +{ + // value, limit and step are 4.24 but step has its exponent and + // top four bits zero + + if(value == limit) + return true; + if(value < limit) { + value = fpadd(value, step); + if(value >= limit) { + value = limit; + return true; + } + return false; + } + + value = fpsub(value, step); + if(value <= limit) { + value = limit; + return true; + } + return false; +} + +// sample is signed 24.8 +s32 swx00_sound_device::fpapply(s32 value, s32 sample) +{ + if(value >= 0x10000000) + return 0; + return (s64(sample) - ((s64(sample) * ((value >> 9) & 0x7fff)) >> 16)) >> (value >> 24); +} + +void swx00_sound_device::sound_stream_update(sound_stream &stream) +{ + for(int i=0; i != stream.samples(); i++) { + s32 dry_l = 0, dry_r = 0; + s32 rev = 0; + s32 cho_l = 0, cho_r = 0; + s32 var_l = 0, var_r = 0; + + for(int chan = 0; chan != 32; chan++) { + if(!m_active[chan]) + continue; + + s16 val0, val1; + u32 base_address = m_sample_address[chan] & 0xffffff; + s32 spos = m_sample_pos[chan] >> 15; + switch(m_sample_address[chan] >> 30) { + case 0: { // 16-bits linear + offs_t adr = base_address + spos; + val0 = read_word(adr); + val1 = read_word(adr+1); + break; + } + + case 1: { // 12-bits linear + offs_t adr = base_address + (spos >> 2)*3; + switch(spos & 3) { + case 0: { // Cabc ..AB .... .... + u16 w0 = read_word(adr); + u16 w1 = read_word(adr+1); + val0 = (w0 & 0x0fff) << 4; + val1 = ((w0 & 0xf000) >> 8) | ((w1 & 0x00ff) << 8); + break; + } + case 1: { // c... BCab ...A .... + u16 w0 = read_word(adr); + u16 w1 = read_word(adr+1); + u16 w2 = read_word(adr+2); + val0 = ((w0 & 0xf000) >> 8) | ((w1 & 0x00ff) << 8); + val1 = ((w1 & 0xff00) >> 4) | ((w2 & 0x000f) << 12); + break; + } + case 2: { // .... bc.. ABCa .... + u16 w1 = read_word(adr+1); + u16 w2 = read_word(adr+2); + val0 = ((w1 & 0xff00) >> 4) | ((w2 & 0x000f) << 12); + val1 = w2 & 0xfff0; + break; + } + case 3: { // .... .... abc. .ABC + u16 w2 = read_word(adr+2); + u16 w3 = read_word(adr+3); + val0 = w2 & 0xfff0; + val1 = (w3 & 0x0fff) << 4; + break; + } + } + break; + } + + case 2: { // 8-bits linear + offs_t adr = base_address + (spos >> 1); + if(spos & 1) { + u16 w0 = read_word(adr); + u16 w1 = read_word(adr+1); + val0 = w0 & 0xff00; + val1 = w1 << 8; + } else { + u16 w0 = read_word(adr); + val0 = w0 << 8; + val1 = w0 & 0xff00; + } + break; + } + + case 3: { // 8-bits delta-pcm + u8 offset = dpcm_offset[(m_sample_address[chan] >> 24) & 3]; + u8 scale = (m_sample_address[chan] >> 26) & 7; + u32 target_address = (base_address << 1) + spos + 1; + while(m_dpcm_address[chan] <= target_address) { + m_dpcm_current[chan] = m_dpcm_next[chan]; + u16 idx = read_word(m_dpcm_address[chan] >> 1); + if(m_dpcm_address[chan] & 1) + idx &= 0xff; + else + idx >>= 8; + m_dpcm_sum[chan] += m_dpcm[idx] - offset; + s32 sample = (m_dpcm_sum[chan] << scale) >> 3; + m_dpcm_address[chan] ++; + if(sample < -0x8000) + sample = -0x8000; + else if(sample > 0x7fff) + sample = 0x7fff; + m_dpcm_next[chan] = sample; + } + val0 = m_dpcm_current[chan]; + val1 = m_dpcm_next[chan]; + break; + } + } + + s32 mul = m_sample_pos[chan] & 0x7fff; + s32 sample = (val1 * mul + val0 * (0x8000 - mul)) >> 7; + + s32 envelope_level; + if(m_decay_on[chan] || (m_attack[chan] & 0xff) || (m_attack[chan] & 0x8000)) + envelope_level = m_envelope_level[chan]; + else + envelope_level = 0; + + s32 tremolo_level = 0; + + dry_l += fpapply(envelope_level + (m_glo_level_cur[chan] << 16) + tremolo_level + ((m_rev_dry[chan] << 20) & 0xff00000) + (m_pan_l[chan] << 16), sample); + dry_r += fpapply(envelope_level + (m_glo_level_cur[chan] << 16) + tremolo_level + ((m_rev_dry[chan] << 20) & 0xff00000) + (m_pan_r[chan] << 16), sample); + rev += fpapply(envelope_level + (m_glo_level_cur[chan] << 16) + tremolo_level + ((m_rev_dry[chan] << 12) & 0xff00000), sample); + cho_l += fpapply(envelope_level + (m_glo_level_cur[chan] << 16) + tremolo_level + ((m_cho_var[chan] << 12) & 0xff00000) + (m_pan_l[chan] << 16), sample); + cho_r += fpapply(envelope_level + (m_glo_level_cur[chan] << 16) + tremolo_level + ((m_cho_var[chan] << 12) & 0xff00000) + (m_pan_r[chan] << 16), sample); + var_l += fpapply(envelope_level + (m_glo_level_cur[chan] << 16) + tremolo_level + ((m_cho_var[chan] << 20) & 0xff00000) + (m_pan_l[chan] << 16), sample); + var_r += fpapply(envelope_level + (m_glo_level_cur[chan] << 16) + tremolo_level + ((m_cho_var[chan] << 20) & 0xff00000) + (m_pan_r[chan] << 16), sample); + + u32 sample_increment = ((m_sample_pitch[chan] & 0xfff) << (8 + (s16(m_sample_pitch[chan]) >> 12))) >> 4; + m_sample_pos[chan] += sample_increment; + if((m_sample_pos[chan] >> 15) >= m_sample_end[chan]) { + if(!m_sample_end[chan]) + m_active[chan] = false; + else { + s32 prev = m_sample_pos[chan]; + do + m_sample_pos[chan] -= m_sample_end[chan] << 15; + while((m_sample_pos[chan] >> 15) >= m_sample_end[chan]); + m_dpcm_address[chan] += (m_sample_pos[chan] >> 15) - (prev >> 15); + m_dpcm_sum[chan] = 0; + } + } + + istep(m_glo_level_cur[chan], (m_glo_pan[chan] >> 4) & 0xff0, 1); + istep(m_pan_l[chan], panmap[(m_glo_pan[chan] >> 4) & 15], 1); + istep(m_pan_r[chan], panmap[m_glo_pan[chan] & 15], 1); + + if(m_decay_on[chan]) { + if((m_decay[chan] & 0x6000) == 0x6000) + m_decay_done[chan] = fpstep(m_envelope_level[chan], (m_decay[chan] & 0xff) << 20, decay_linear_step[(m_decay[chan] >> 8) & 0x1f]); + else + m_decay_done[chan] = istep(m_envelope_level[chan], (m_decay[chan] & 0xff) << 20, m_global_step[m_decay[chan] >> 8] << 1); + if(m_envelope_level[chan] & 0x8000000) + m_active[chan] = false; + + } else if(m_attack[chan] & 0x8000) + m_decay_on[chan] = fpstep(m_envelope_level[chan], 0, attack_linear_step[(m_attack[chan] >> 8) & 0x7f]); + else + m_decay_on[chan] = istep(m_envelope_level[chan], 0, m_global_step[m_attack[chan] >> 8] << 1); + } + + dry_l >>= 8; + dry_r >>= 8; + rev >>= 8; + cho_l >>= 8; + cho_r >>= 8; + var_l >>= 8; + var_r >>= 8; + + (void)rev; + (void)cho_l; + (void)cho_r; + (void)var_l; + (void)var_r; + + stream.put_int(0, i, dry_l, 32768); + stream.put_int(1, i, dry_r, 32768); + } +} |