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Diffstat (limited to 'engines/scumm/player/nes.cpp')
| -rw-r--r-- | engines/scumm/player/nes.cpp | 1067 |
1 files changed, 0 insertions, 1067 deletions
diff --git a/engines/scumm/player/nes.cpp b/engines/scumm/player/nes.cpp deleted file mode 100644 index 072f46dd5a..0000000000 --- a/engines/scumm/player/nes.cpp +++ /dev/null @@ -1,1067 +0,0 @@ -/* ScummVM - Graphic Adventure Engine - * - * ScummVM is the legal property of its developers, whose names - * are too numerous to list here. Please refer to the COPYRIGHT - * file distributed with this source distribution. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - - * You should have received a copy of the GNU General Public License - * aint32 with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - */ - -#ifndef DISABLE_NES_APU - -#include "engines/engine.h" -#include "scumm/player/nes.h" -#include "scumm/scumm.h" -#include "audio/mixer.h" - -namespace Scumm { - -static const byte channelMask[4] = {1, 2, 4, 8}; - -static const uint16 freqTable[64] = { - 0x07F0, 0x077E, 0x0712, 0x06AE, 0x064E, 0x05F3, 0x059E, 0x054D, - 0x0501, 0x04B9, 0x0475, 0x0435, 0x03F8, 0x03BF, 0x0389, 0x0357, - 0x0327, 0x02F9, 0x02CF, 0x02A6, 0x0280, 0x025C, 0x023A, 0x021A, - 0x01FC, 0x01DF, 0x01C4, 0x01AB, 0x0193, 0x017C, 0x0167, 0x0152, - 0x013F, 0x012D, 0x011C, 0x010C, 0x00FD, 0x00EE, 0x00E1, 0x00D4, - 0x00C8, 0x00BD, 0x00B2, 0x00A8, 0x009F, 0x0096, 0x008D, 0x0085, - 0x007E, 0x0076, 0x0070, 0x0069, 0x0063, 0x005E, 0x0058, 0x0053, - 0x004F, 0x004A, 0x0046, 0x0042, 0x003E, 0x003A, 0x0037, 0x0034 -}; - -static const byte instChannel[16] = { - 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 1, 3, 3, 3 -}; -static const byte startCmd[16] = { - 0x05, 0x03, 0x06, 0x08, 0x0B, 0x01, 0x01, 0x1A, - 0x16, 0x06, 0x04, 0x17, 0x02, 0x10, 0x0E, 0x0D -}; -static const byte releaseCmd[16] = { - 0x0F, 0x00, 0x00, 0x09, 0x00, 0x14, 0x15, 0x00, - 0x00, 0x00, 0x1B, 0x1B, 0x0F, 0x0F, 0x0F, 0x0F -}; -static const byte nextCmd[28] = { - 0xFF, 0xFF, 0xFF, 0xFF, 0x17, 0xFF, 0x07, 0xFF, - 0xFF, 0x0A, 0x09, 0x0C, 0x00, 0x00, 0x00, 0x00, - 0x11, 0x12, 0x11, 0x03, 0xFF, 0xFF, 0x18, 0x00, - 0x19, 0x00, 0x00, 0x00 -}; -static const byte nextDelay[28] = { - 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x03, 0x00, - 0x00, 0x05, 0x08, 0x03, 0x00, 0x00, 0x00, 0x00, - 0x02, 0x02, 0x02, 0x00, 0x00, 0x00, 0x03, 0x00, - 0x03, 0x00, 0x00, 0x00 -}; - -namespace APUe { - -static const byte LengthCounts[32] = { - 0x0A,0xFE, - 0x14,0x02, - 0x28,0x04, - 0x50,0x06, - 0xA0,0x08, - 0x3C,0x0A, - 0x0E,0x0C, - 0x1A,0x0E, - - 0x0C,0x10, - 0x18,0x12, - 0x30,0x14, - 0x60,0x16, - 0xC0,0x18, - 0x48,0x1A, - 0x10,0x1C, - 0x20,0x1E -}; - -class SoundGen { -protected: - byte wavehold; - uint32 freq; // short - uint32 CurD; - -public: - byte Timer; - int32 Pos; - uint32 Cycles; // short - - inline byte GetTimer() const { return Timer; } -}; - -class Square : public SoundGen { -protected: - byte volume, envelope, duty, swpspeed, swpdir, swpstep, swpenab; - byte Vol; - byte EnvCtr, Envelope, BendCtr; - bool Enabled, ValidFreq, Active; - bool EnvClk, SwpClk; - - void CheckActive(); - -public: - void Reset(); - void Write(int Reg, byte Val); - void Run(); - void QuarterFrame(); - void HalfFrame(); -}; - -static const int8 Duties[4][8] = { - {-4,+4,-4,-4,-4,-4,-4,-4}, - {-4,+4,+4,-4,-4,-4,-4,-4}, - {-4,+4,+4,+4,+4,-4,-4,-4}, - {+4,-4,-4,+4,+4,+4,+4,+4} -}; - -void Square::Reset() { - memset(this, 0, sizeof(*this)); - Cycles = 1; - EnvCtr = 1; - BendCtr = 1; -} - -void Square::CheckActive() { - ValidFreq = (freq >= 0x8) && ((swpdir) || !((freq + (freq >> swpstep)) & 0x800)); - Active = Timer && ValidFreq; - Pos = Active ? (Duties[duty][CurD] * Vol) : 0; -} - -void Square::Write(int Reg, byte Val) { - switch (Reg) { - case 0: - volume = Val & 0xF; - envelope = Val & 0x10; - wavehold = Val & 0x20; - duty = (Val >> 6) & 0x3; - Vol = envelope ? volume : Envelope; - break; - - case 1: - swpstep = Val & 0x07; - swpdir = Val & 0x08; - swpspeed = (Val >> 4) & 0x7; - swpenab = Val & 0x80; - SwpClk = true; - break; - - case 2: - freq &= 0x700; - freq |= Val; - break; - - case 3: - freq &= 0xFF; - freq |= (Val & 0x7) << 8; - - if (Enabled) - Timer = LengthCounts[(Val >> 3) & 0x1F]; - - CurD = 0; - EnvClk = true; - break; - - case 4: - Enabled = (Val != 0); - if (!Enabled) - Timer = 0; - break; - } - CheckActive(); -} - -void Square::Run() { - Cycles = (freq + 1) << 1; - CurD = (CurD + 1) & 0x7; - - if (Active) - Pos = Duties[duty][CurD] * Vol; -} - -void Square::QuarterFrame() { - if (EnvClk) { - EnvClk = false; - Envelope = 0xF; - EnvCtr = volume + 1; - } else if (!--EnvCtr) { - EnvCtr = volume + 1; - - if (Envelope) - Envelope--; - else - Envelope = wavehold ? 0xF : 0x0; - } - - Vol = envelope ? volume : Envelope; - CheckActive(); -} - -void Square::HalfFrame() { - if (!--BendCtr) { - BendCtr = swpspeed + 1; - - if (swpenab && swpstep && ValidFreq) { - int sweep = freq >> swpstep; - // FIXME: Is -sweep or ~sweep correct??? - freq += swpdir ? -sweep : sweep; - } - } - - if (SwpClk) { - SwpClk = false; - BendCtr = swpspeed + 1; - } - - if (Timer && !wavehold) - Timer--; - - CheckActive(); -} - - -class Triangle : public SoundGen { -protected: - byte linear; - byte LinCtr; - bool Enabled, Active; - bool LinClk; - - void CheckActive(); - -public: - void Reset(); - void Write(int Reg, byte Val); - void Run(); - void QuarterFrame(); - void HalfFrame(); -}; - -static const int8 TriDuty[32] = { - -8,-7,-6,-5,-4,-3,-2,-1, - +0,+1,+2,+3,+4,+5,+6,+7, - +7,+6,+5,+4,+3,+2,+1,+0, - -1,-2,-3,-4,-5,-6,-7,-8 -}; - -void Triangle::Reset() { - memset(this, 0, sizeof(*this)); - Cycles = 1; -} - -void Triangle::CheckActive() { - Active = Timer && LinCtr; - - if (freq < 4) - Pos = 0; // beyond hearing range - else - Pos = TriDuty[CurD] * 8; -} - -void Triangle::Write(int Reg, byte Val) { - switch (Reg) { - case 0: - linear = Val & 0x7F; - wavehold = (Val >> 7) & 0x1; - break; - - case 2: - freq &= 0x700; - freq |= Val; - break; - - case 3: - freq &= 0xFF; - freq |= (Val & 0x7) << 8; - - if (Enabled) - Timer = LengthCounts[(Val >> 3) & 0x1F]; - - LinClk = true; - break; - - case 4: - Enabled = (Val != 0); - if (!Enabled) - Timer = 0; - break; - } - CheckActive(); -} - -void Triangle::Run() { - Cycles = freq + 1; - - if (Active) { - CurD++; - CurD &= 0x1F; - - if (freq < 4) - Pos = 0; // beyond hearing range - else - Pos = TriDuty[CurD] * 8; - } -} - -void Triangle::QuarterFrame() { - if (LinClk) - LinCtr = linear; - else if (LinCtr) - LinCtr--; - - if (!wavehold) - LinClk = false; - - CheckActive(); -} - -void Triangle::HalfFrame() { - if (Timer && !wavehold) - Timer--; - - CheckActive(); -} - -class Noise : public SoundGen { -protected: - byte volume, envelope, datatype; - byte Vol; - byte EnvCtr, Envelope; - bool Enabled; - bool EnvClk; - - void CheckActive(); - -public: - void Reset(); - void Write(int Reg, byte Val); - void Run(); - void QuarterFrame(); - void HalfFrame(); -}; - -static const uint32 NoiseFreq[16] = { - 0x004,0x008,0x010,0x020,0x040,0x060,0x080,0x0A0, - 0x0CA,0x0FE,0x17C,0x1FC,0x2FA,0x3F8,0x7F2,0xFE4 -}; - -void Noise::Reset() { - memset(this, 0, sizeof(*this)); - CurD = 1; - Cycles = 1; - EnvCtr = 1; - -} - -void Noise::Write(int Reg, byte Val) { - switch (Reg) { - case 0: - volume = Val & 0x0F; - envelope = Val & 0x10; - wavehold = Val & 0x20; - Vol = envelope ? volume : Envelope; - - if (Timer) - Pos = ((CurD & 0x4000) ? -2 : 2) * Vol; - break; - - case 2: - freq = Val & 0xF; - datatype = Val & 0x80; - break; - - case 3: - if (Enabled) - Timer = LengthCounts[(Val >> 3) & 0x1F]; - - EnvClk = true; - break; - - case 4: - Enabled = (Val != 0); - if (!Enabled) - Timer = 0; - break; - } -} - -void Noise::Run() { - Cycles = NoiseFreq[freq]; /* no + 1 here */ - - if (datatype) - CurD = (CurD << 1) | (((CurD >> 14) ^ (CurD >> 8)) & 0x1); - else - CurD = (CurD << 1) | (((CurD >> 14) ^ (CurD >> 13)) & 0x1); - - if (Timer) - Pos = ((CurD & 0x4000) ? -2 : 2) * Vol; -} - -void Noise::QuarterFrame() { - if (EnvClk) { - EnvClk = false; - Envelope = 0xF; - EnvCtr = volume + 1; - } else if (!--EnvCtr) { - EnvCtr = volume + 1; - - if (Envelope) - Envelope--; - else - Envelope = wavehold ? 0xF : 0x0; - } - - Vol = envelope ? volume : Envelope; - - if (Timer) - Pos = ((CurD & 0x4000) ? -2 : 2) * Vol; -} - -void Noise::HalfFrame() { - if (Timer && !wavehold) - Timer--; -} - -class APU { -protected: - int BufPos; - int SampleRate; - - Square _square0; - Square _square1; - Triangle _triangle; - Noise _noise; - - struct { - uint32 Cycles; - int Num; - } Frame; - -public: - APU(int rate) : SampleRate(rate) { - Reset(); - } - - void WriteReg(int Addr, byte Val); - byte Read4015(); - void Reset (); - int16 GetSample(); -}; - -void APU::WriteReg(int Addr, byte Val) { - switch (Addr) { - case 0x000: _square0.Write(0,Val); break; - case 0x001: _square0.Write(1,Val); break; - case 0x002: _square0.Write(2,Val); break; - case 0x003: _square0.Write(3,Val); break; - case 0x004: _square1.Write(0,Val); break; - case 0x005: _square1.Write(1,Val); break; - case 0x006: _square1.Write(2,Val); break; - case 0x007: _square1.Write(3,Val); break; - case 0x008: _triangle.Write(0,Val); break; - case 0x009: _triangle.Write(1,Val); break; - case 0x00A: _triangle.Write(2,Val); break; - case 0x00B: _triangle.Write(3,Val); break; - case 0x00C: _noise.Write(0,Val); break; - case 0x00D: _noise.Write(1,Val); break; - case 0x00E: _noise.Write(2,Val); break; - case 0x00F: _noise.Write(3,Val); break; - case 0x015: _square0.Write(4,Val & 0x1); - _square1.Write(4,Val & 0x2); - _triangle.Write(4,Val & 0x4); - _noise.Write(4,Val & 0x8); - break; - } -} - -byte APU::Read4015() { - byte result = - (( _square0.GetTimer()) ? 0x01 : 0) | - (( _square1.GetTimer()) ? 0x02 : 0) | - ((_triangle.GetTimer()) ? 0x04 : 0) | - (( _noise.GetTimer()) ? 0x08 : 0); - return result; -} - -void APU::Reset () { - BufPos = 0; - - _square0.Reset(); - _square1.Reset(); - _triangle.Reset(); - _noise.Reset(); - - Frame.Num = 0; - Frame.Cycles = 1; -} - -template<class T> -int step(T &obj, int sampcycles, uint frame_Cycles, int frame_Num) { - int samppos = 0; - while (sampcycles) { - // Compute the maximal amount we can step ahead before triggering - // an action (i.e. compute the minimum of sampcycles, frame_Cycles - // and obj.Cycles). - uint max_step = sampcycles; - if (max_step > frame_Cycles) - max_step = frame_Cycles; - if (max_step > obj.Cycles) - max_step = obj.Cycles; - - // During all but the last of these steps, we just add the value of obj.Pos - // to samppos -- so we can to that all at once with a simple multiplication: - samppos += obj.Pos * (max_step - 1); - - // Now step ahead... - sampcycles -= max_step; - frame_Cycles -= max_step; - obj.Cycles -= max_step; - - if (!frame_Cycles) { - frame_Cycles = 7457; - - if (frame_Num < 4) { - obj.QuarterFrame(); - - if (frame_Num & 1) - frame_Cycles++; - else - obj.HalfFrame(); - - frame_Num++; - } else - frame_Num = 0; - } - - if (!obj.Cycles) - obj.Run(); - - samppos += obj.Pos; - } - - return samppos; -} - -int16 APU::GetSample() { - int samppos = 0; - - const int sampcycles = 1+(1789773-BufPos-1)/SampleRate; - BufPos = BufPos + sampcycles * SampleRate - 1789773; - - samppos += step( _square0, sampcycles, Frame.Cycles, Frame.Num); - samppos += step( _square1, sampcycles, Frame.Cycles, Frame.Num); - samppos += step(_triangle, sampcycles, Frame.Cycles, Frame.Num); - samppos += step( _noise, sampcycles, Frame.Cycles, Frame.Num); - - uint tmp = sampcycles; - while (tmp >= Frame.Cycles) { - tmp -= Frame.Cycles; - Frame.Cycles = 7457; - - if (Frame.Num < 4) { - if (Frame.Num & 1) - Frame.Cycles++; - Frame.Num++; - } else - Frame.Num = 0; - } - - Frame.Cycles -= tmp; - - return (samppos << 6) / sampcycles; -} - -} // End of namespace APUe - -Player_NES::Player_NES(ScummEngine *scumm, Audio::Mixer *mixer) { - int i; - _vm = scumm; - _mixer = mixer; - _sampleRate = _mixer->getOutputRate(); - _apu = new APUe::APU(_sampleRate); - - _samples_per_frame = _sampleRate / 60; - _current_sample = 0; - - for (i = 0; i < NUMSLOTS; i++) { - _slot[i].id = -1; - _slot[i].framesleft = 0; - _slot[i].type = 0; - _slot[i].offset = 0; - _slot[i].data = NULL; - } - - for (i = 0; i < NUMCHANS; i++) { - _mchan[i].command = 0; - _mchan[i].framedelay = 0; - _mchan[i].pitch = 0; - _mchan[i].volume = 0; - _mchan[i].voldelta = 0; - _mchan[i].envflags = 0; - _mchan[i].cmdlock = 0; - } - isSFXplaying = wasSFXplaying = false; - - auxData1 = auxData2 = NULL; - numNotes = 0; - - APU_writeControl(0); - - _mixer->playStream(Audio::Mixer::kPlainSoundType, &_soundHandle, this, -1, Audio::Mixer::kMaxChannelVolume, 0, DisposeAfterUse::NO, true); -} - -Player_NES::~Player_NES() { - _mixer->stopHandle(_soundHandle); - delete _apu; -} - -void Player_NES::setMusicVolume (int vol) { - _maxvol = vol; -} - -int Player_NES::readBuffer(int16 *buffer, const int numSamples) { - for (int n = 0; n < numSamples; n++) { - buffer[n] = _apu->GetSample() * _maxvol / 255; - _current_sample++; - - if (_current_sample == _samples_per_frame) { - _current_sample = 0; - sound_play(); - } - } - return numSamples; -} -void Player_NES::stopAllSounds() { - for (int i = 0; i < NUMSLOTS; i++) { - _slot[i].framesleft = 0; - _slot[i].type = 0; - _slot[i].id = -1; - } - - isSFXplaying = 0; - checkSilenceChannels(0); -} - -void Player_NES::stopSound(int nr) { - if (nr == -1) - return; - - for (int i = 0; i < NUMSLOTS; i++) { - if (_slot[i].id != nr) - continue; - - isSFXplaying = 0; - _slot[i].framesleft = 0; - _slot[i].type = 0; - _slot[i].id = -1; - checkSilenceChannels(i); - } -} - -void Player_NES::startSound(int nr) { - byte *data = _vm->getResourceAddress(rtSound, nr) + 2; - assert(data); - - int soundType = data[1]; - int chan = data[0]; - - if (chan == 4) { - if (_slot[2].framesleft) - return; - chan = 0; - } - - if (soundType < _slot[chan].type) - return; - - _slot[chan].type = soundType; - _slot[chan].id = nr; - _slot[chan].data = data; - _slot[chan].offset = 2; - _slot[chan].framesleft = 1; - checkSilenceChannels(chan); - if (chan == 2) { - numNotes = _slot[chan].data[2]; - auxData1 = _slot[chan].data + 3; - auxData2 = auxData1 + numNotes; - _slot[chan].data = auxData2 + numNotes; - _slot[chan].offset = 0; - - for (int i = 0; i < NUMCHANS; i++) - _mchan[i].cmdlock = 0; - } -} - -void Player_NES::checkSilenceChannels(int chan) { - for (chan--; chan >= 0; chan--) { - if (_slot[chan].framesleft) - return; - } - APU_writeControl(0); -} - -void Player_NES::sound_play() { - if (_slot[0].framesleft) - playSFX(0); - else if (_slot[1].framesleft) - playSFX(1); - - playMusic(); -} - -void Player_NES::playSFX (int nr) { - if (--_slot[nr].framesleft) - return; - - while (1) { - int a = _slot[nr].data[_slot[nr].offset++]; - if (a < 16) { - a >>= 2; - APU_writeControl(APU_readStatus() | channelMask[a]); - isSFXplaying = true; - APU_writeChannel(a, 0, _slot[nr].data[_slot[nr].offset++]); - APU_writeChannel(a, 1, _slot[nr].data[_slot[nr].offset++]); - APU_writeChannel(a, 2, _slot[nr].data[_slot[nr].offset++]); - APU_writeChannel(a, 3, _slot[nr].data[_slot[nr].offset++]); - } else if (a == 0xFE) { - _slot[nr].offset = 2; - } else if (a == 0xFF) { - _slot[nr].id = -1; - _slot[nr].type = 0; - isSFXplaying = false; - APU_writeControl(0); - - if (!nr && _slot[1].framesleft) { - _slot[1].framesleft = 1; - isSFXplaying = true; - } - return; - } else { - _slot[nr].framesleft = _slot[nr].data[_slot[nr].offset++]; - return; - } - } -} - -void Player_NES::playMusic() { - if (!_slot[2].framesleft) - return; - - if (wasSFXplaying && !isSFXplaying) - for (int x = 1; x >= 0; x--) - if (_mchan[x].cmdlock) { - _mchan[x].command = _mchan[x].cmdlock; - _mchan[x].framedelay = 1; - } - - wasSFXplaying = isSFXplaying; - if (!--_slot[2].framesleft) { -top: - int b = _slot[2].data[_slot[2].offset++]; - if (b == 0xFF) { - _slot[2].id = -1; - _slot[2].type = 0; - b = 0; - } else if (b == 0xFE) { - _slot[2].offset = 0; - goto top; - } else { - if (b < numNotes) { - int inst = auxData1[b]; - int ch = instChannel[inst]; - _mchan[ch].pitch = auxData2[b]; - _mchan[ch].cmdlock = startCmd[inst]; - _mchan[ch].command = startCmd[inst]; - _mchan[ch].framedelay = 1; - goto top; - } - b -= numNotes; - if (b < 16) { - int inst = b; - int ch = instChannel[inst]; - _mchan[ch].cmdlock = 0; - _mchan[ch].command = releaseCmd[inst]; - _mchan[ch].framedelay = 1; - goto top; - } - b -= 16; - } - _slot[2].framesleft = b; - } - - for (int x = NUMCHANS - 1; x >= 0; x--) { - if (_slot[0].framesleft || _slot[1].framesleft) { - _mchan[x].volume = 0; - _mchan[x].framedelay = 0; - continue; - } - - if (_mchan[x].framedelay && !--_mchan[x].framedelay) { - switch (_mchan[x].command) { - case 0x00: - case 0x13: - _mchan[x].voldelta = -10; - break; - - case 0x01: - case 0x03: - case 0x08: - case 0x16: - _mchan[x].envflags = 0x30; - _mchan[x].volume = 0x6F; - _mchan[x].voldelta = 0; - - APU_writeChannel(x, 0, 0x00); - APU_writeChannel(x, 1, 0x7F); - APU_writeControl(APU_readStatus() | channelMask[x]); - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch] >> 8); - - chainCommand(x); - break; - - case 0x02: - _mchan[x].envflags = 0xB0; - _mchan[x].volume = 0x6F; - _mchan[x].voldelta = 0; - - APU_writeChannel(x, 0, 0x00); - APU_writeChannel(x, 1, 0x84); - APU_writeControl(APU_readStatus() | channelMask[x]); - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch] >> 8); - - chainCommand(x); - break; - - case 0x04: - _mchan[x].envflags = 0x80; - _mchan[x].volume = 0x6F; - _mchan[x].voldelta = 0; - - APU_writeChannel(x, 0, 0x00); - APU_writeChannel(x, 1, 0x7F); - APU_writeControl(APU_readStatus() | channelMask[x]); - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch] >> 8); - - chainCommand(x); - break; - - case 0x05: - _mchan[x].envflags = 0xF0; - _mchan[x].volume = 0x6F; - _mchan[x].voldelta = -15; - - APU_writeChannel(x, 1, 0x7F); - APU_writeControl(APU_readStatus() | channelMask[x]); - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch] >> 8); - - chainCommand(x); - break; - - case 0x06: - _mchan[x].pitch += 0x18; - _mchan[x].envflags = 0x80; - _mchan[x].volume = 0x6F; - _mchan[x].voldelta = 0; - - APU_writeChannel(x, 0, 0x00); - APU_writeChannel(x, 1, 0x7F); - APU_writeControl(APU_readStatus() | channelMask[x]); - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch] >> 8); - - chainCommand(x); - break; - - case 0x07: - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch - 0x0C] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch - 0x0C] >> 8); - - chainCommand(x); - break; - - case 0x09: - _mchan[x].voldelta = -2; - - APU_writeChannel(x, 1, 0x7F); - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch] >> 8); - - chainCommand(x); - break; - - case 0x0A: - APU_writeChannel(x, 1, 0x86); - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch] >> 8); - - chainCommand(x); - break; - - case 0x0B: case 0x1A: - _mchan[x].envflags = 0x70; - _mchan[x].volume = 0x6F; - _mchan[x].voldelta = 0; - - APU_writeChannel(x, 0, 0x00); - APU_writeChannel(x, 1, 0x7F); - APU_writeControl(APU_readStatus() | channelMask[x]); - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch] >> 8); - - chainCommand(x); - break; - - case 0x0C: - _mchan[x].envflags = 0xB0; - - chainCommand(x); - break; - - case 0x0D: - _mchan[x].envflags = 0x30; - _mchan[x].volume = 0x5F; - _mchan[x].voldelta = -22; - - APU_writeChannel(x, 0, 0x00); - APU_writeControl(APU_readStatus() | channelMask[x]); - APU_writeChannel(x, 2, _mchan[x].pitch & 0xF); - APU_writeChannel(x, 3, 0xFF); - - chainCommand(x); - break; - - case 0x0E: - case 0x10: - _mchan[x].envflags = 0x30; - _mchan[x].volume = 0x5F; - _mchan[x].voldelta = -6; - - APU_writeChannel(x, 0, 0x00); - APU_writeControl(APU_readStatus() | channelMask[x]); - APU_writeChannel(x, 2, _mchan[x].pitch & 0xF); - APU_writeChannel(x, 3, 0xFF); - - chainCommand(x); - break; - - case 0x0F: - chainCommand(x); - break; - - case 0x11: - APU_writeChannel(x, 2, _mchan[x].pitch & 0xF); - APU_writeChannel(x, 3, 0xFF); - - chainCommand(x); - break; - - case 0x12: - APU_writeChannel(x, 2, (_mchan[x].pitch + 3) & 0xF); - APU_writeChannel(x, 3, 0xFF); - - chainCommand(x); - break; - - case 0x14: - _mchan[x].voldelta = -12; - - APU_writeChannel(x, 1, 0x8C); - - chainCommand(x); - break; - - case 0x15: - _mchan[x].voldelta = -12; - - APU_writeChannel(x, 1, 0x84); - - chainCommand(x); - break; - - case 0x17: - _mchan[x].pitch += 0x0C; - _mchan[x].envflags = 0x80; - _mchan[x].volume = 0x6F; - _mchan[x].voldelta = 0; - - APU_writeChannel(x, 0, 0x00); - APU_writeChannel(x, 1, 0x7F); - APU_writeControl(APU_readStatus() | channelMask[x]); - APU_writeChannel(x, 2, freqTable[_mchan[x].pitch] & 0xFF); - APU_writeChannel(x, 3, freqTable[_mchan[x].pitch] >> 8); - - chainCommand(x); - break; - - case 0x18: - _mchan[x].envflags = 0x70; - - chainCommand(x); - break; - - case 0x19: - _mchan[x].envflags = 0xB0; - - chainCommand(x); - break; - - case 0x1B: - _mchan[x].envflags = 0x00; - _mchan[x].voldelta = -10; - break; - } - } - - _mchan[x].volume += _mchan[x].voldelta; - - if (_mchan[x].volume < 0) - _mchan[x].volume = 0; - if (_mchan[x].volume > MAXVOLUME) - _mchan[x].volume = MAXVOLUME; - - APU_writeChannel(x, 0, (_mchan[x].volume >> 3) | _mchan[x].envflags); - } -} - -void Player_NES::chainCommand(int c) { - int i = _mchan[c].command; - _mchan[c].command = nextCmd[i]; - _mchan[c].framedelay = nextDelay[i]; -} - -int Player_NES::getSoundStatus(int nr) const { - for (int i = 0; i < NUMSLOTS; i++) - if (_slot[i].id == nr) - return 1; - return 0; -} - -void Player_NES::APU_writeChannel(int chan, int offset, byte value) { - _apu->WriteReg(0x000 + 4 * chan + offset, value); -} -void Player_NES::APU_writeControl(byte value) { - _apu->WriteReg(0x015, value); -} -byte Player_NES::APU_readStatus() { - return _apu->Read4015(); -} - -} // End of namespace Scumm - -#endif // DISABLE_NES_APU |