Rename modplayer.h to r1.0/modplayer.h
This commit is contained in:
Jason
@@ -0,0 +1,612 @@
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// ================================ Define ModPlayer Class (MOD Player) ===============================================
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class ModPlayer // ModPlayer class
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{
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private:
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Paula *P; // create instance of Paula
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static sInt BasePTable[5 * 12 + 1]; // base period table (5 octaves x 12 semitones + extra 1)
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static sInt PTable[16][60]; // period table (16 period tables x 60 semitones (5 x 12)
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static sInt VibTable[3][15][64]; // vibrato table (vib waveform, vib amplitude, vib position)
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// ** tick related
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sInt Speed; // speed
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sInt TickRate; // tick rate
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sInt TRCounter; // tick rate counter
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sInt CurTick; // current tick
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sInt CurRow; // current row
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sInt CurPos; // current song position
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sInt Delay; // delay?
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// ** sample related
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sS8 *SData[32]; // sample data
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sInt SampleCount; // sample count
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sInt ChannelCount; // channel count
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// ** pattern related
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sU8 PatternList[128]; // pattern list
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sInt PositionCount; // position count
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sInt PatternCount; // pattern count
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// ################################################ SAMPLE STRUCTURE ################################################
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private:
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struct Sample
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{
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char Name[22]; // sample name
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sU16 Length; // sample length
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sS8 Finetune; // sample finetune
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sU8 Volume; // sample volume
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sU16 LoopStart; // sample loop start position
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sU16 LoopLen; // sample loop length
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// ************ PREPARE ************
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void Prepare () // take care on endianness issues
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{
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sSwapEndian (Length); // swap high & low bytes
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sSwapEndian (LoopStart); // swap high & low bytes
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sSwapEndian (LoopLen); // swap high & low bytes
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Finetune &= 0x0f;
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if (Finetune >= 8) Finetune -= 16; // sample finetune is between -8 & 7
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}
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} *Samples; // Sample structure end
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// Sample *Samples;
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// ################################################ PATTERN STRUCTURE ################################################
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private:
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struct Pattern // pattern structure
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{
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struct Event
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{
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sInt Sample; // sample
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sInt Note; // note
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sInt FX; // effect
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sInt FXParm; // effect paramater
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} Events[64][4];
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// ************ PATTERN CONSTRUCTOR ************
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Pattern ()
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{
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sZeroMem (this, sizeof (Pattern)); // pattern constructor
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}
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// ************ LOAD ************
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void Load (sU8 *ptr) // Load start
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{
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for (sInt row = 0; row < 64; row++)
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for (sInt ch = 0; ch < 4; ch++)
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{
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Event &e = Events[row][ch];
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e.Sample = (ptr[0] & 0xf0) | (ptr[2] >> 4); // sample
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e.FX = ptr[2] & 0x0f; // effect
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e.FXParm = ptr[3]; // effect paramater
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e.Note = 0; // note
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sInt period = (sInt (ptr[0] & 0x0f) << 8) | ptr[1];
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sInt bestd = sAbs (period - BasePTable[0]);
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if (period)
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for (sInt i = 1; i <= 60; i++)
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{
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sInt d = sAbs (period - BasePTable[i]);
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if (d < bestd)
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{
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bestd = d;
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e.Note = i;
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}
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} // period
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ptr += 4;
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}
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} // Load end
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} Patterns[128]; // Pattern structure end
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// Pattern Patterns[128]; // patterns
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// ################################################ CHANNEL STRUCTURE ################################################
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private:
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struct Chan // Channel Structure start
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{
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sInt Note; // note
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sInt Period; // period
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sInt Sample; // sample
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sInt FineTune; // fine tune
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sInt Volume; // volume
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sInt FXBuf[16]; // effects buffer
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sInt FXBuf14[16]; // effects buffer (command 14 - extend)
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sInt LoopStart; // loop start
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sInt LoopCount; // loop count
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sInt RetrigCount; // retrigger count
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sInt VibWave; // vibrato waveform
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sInt VibRetr; // vibrato retrigger
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sInt VibPos; // vibrato position
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sInt VibAmpl; // vibrato amplitude
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sInt VibSpeed; // vibrato speed
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sInt TremWave; // tremolo waveform
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sInt TremRetr; // tremolo retrigger
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sInt TremPos; // tremolo position
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sInt TremAmpl; // tremolo amplitude
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sInt TremSpeed; // tremolo speed
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// ************ CONSTRUCTOR ************
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Chan () { sZeroMem (this, sizeof (Chan)); } // channel constructor
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// ************ GET PERIOD ************
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sInt GetPeriod (sInt offs = 0, sInt fineoffs = 0) // Get Period
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{
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sInt ft = FineTune + fineoffs; // fintune offset
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while (ft > 7)
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{
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offs++; // offset
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ft -= 16;
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}
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while (ft < -8)
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{
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offs--;
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ft += 16;
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}
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return Note ? (PTable[ft & 0x0f][sClamp (Note + offs - 1, 0, 59)]) : 0;
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}
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// ************ SET PERIOD ************
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void SetPeriod (sInt offs = 0, sInt fineoffs = 0) // Set Period
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{
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if (Note)
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Period = GetPeriod (offs, fineoffs);
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}
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} Chans[4]; // Channel Structure end
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// ************ CALCULATE TICK RATE ************
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private:
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void CalcTickRate (sInt bpm) // calculate tick rate start
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{
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TickRate = (125 * OUTRATE) / (bpm * OUTFPS);
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} // calculate tick rate end
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// ************ TRIGGER NOTE ************
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private:
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void TrigNote (sInt ch, const Pattern::Event &e) // trigger note (channel, event)
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{
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Chan &c = Chans[ch]; // channel
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Paula::Voice &v = P->V[ch]; // Paula::Voice &v = P->[ch]; P is instance of Paula class,
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// v is voice, ch is channel - reference (alias)
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const Sample &s = Samples[c.Sample];
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sInt offset = 0;
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if (e.FX == 9)
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offset = c.FXBuf[9] << 8;
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if (e.FX != 3 && e.FX != 5)
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{
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c.SetPeriod ();
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if (s.LoopLen > 1)
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v.Trigger (SData[c.Sample], 2 * (s.LoopStart + s.LoopLen), 2 * s.LoopLen, offset);
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else
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v.Trigger (SData[c.Sample], v.SampleLen = 2 * s.Length, 1, offset);
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if (!c.VibRetr)
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c.VibPos = 0;
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if (!c.TremRetr)
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c.TremPos = 0;
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}
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} // Trigger note end
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// ************ RESET ************
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private:
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void Reset () // reset function
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{
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CalcTickRate (125); // default tick rate = 125
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Speed = 6; // default speed = 6
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TRCounter = 0; // tick rate counter = 0
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CurTick = 0; // current tick = 0
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CurRow = 0; // current row = 0
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CurPos = 0; // current song position = 0
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Delay = 0; // delay = 0
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}
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// ************ TICK ************
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private:
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void Tick () // start tick routine, cycle (50Hz, 20ms)
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{
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const Pattern &p = Patterns[PatternList[CurPos]];
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const Pattern::Event *re = p.Events[CurRow];
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for (sInt ch = 0; ch < 4; ch++)
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{
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const Pattern::Event &e = re[ch];
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Paula::Voice &v = P->V[ch];
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Chan &c = Chans[ch];
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const sInt fxpl = e.FXParm & 0x0f; // pattern list
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sInt TremVol = 0;
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if (!CurTick)
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{
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if (e.Sample)
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{
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c.Sample = e.Sample;
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c.FineTune = Samples[c.Sample].Finetune;
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c.Volume = Samples[c.Sample].Volume;
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}
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if (e.FXParm)
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c.FXBuf[e.FX] = e.FXParm;
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if (e.Note && (e.FX != 14 || ((e.FXParm >> 4) != 13)))
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{
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c.Note = e.Note;
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TrigNote (ch, e);
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}
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switch (e.FX)
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{
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case 4: // vibrato (4) / vibrato + volume slide (6)
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case 6:
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if (c.FXBuf[4] & 0x0f)
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c.VibAmpl = c.FXBuf[4] & 0x0f;
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if (c.FXBuf[4] & 0xf0)
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c.VibSpeed = c.FXBuf[4] >> 4;
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c.SetPeriod (0,
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VibTable[c.VibWave][(c.VibAmpl) - 1][c.VibPos]);
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break;
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case 7: // tremolo (7)
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if (c.FXBuf[7] & 0x0f)
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c.TremAmpl = c.FXBuf[7] & 0x0f;
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if (c.FXBuf[7] & 0xf0)
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c.TremSpeed = c.FXBuf[7] >> 4;
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TremVol = VibTable[c.TremWave][(c.TremAmpl) - 1][c.TremPos];
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break;
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case 12: // set volume (C)
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c.Volume = sClamp (e.FXParm, 0, 64);
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break;
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case 14: // special (Exx)
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// (E0X - turn filter on/off),
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// (E1x - porta up, fine),
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// (E2x - porta down, fine),
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// (E3x - glissando control),
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// (E4x - vibratio waveform),
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// (E5x - set finetune),
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// (E6x - pattern loop),
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// (E7x - tremolo waveform),
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// (E8x - not implemented),
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// (E9x - retrigger note),
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// (EAx - volume slide up, fine),
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// (EBx - volume slide down, fine),
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// (ECx - cut note),
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// (EDx - delay note),
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// (EEx - pattern delay),
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// (EFx - not implemented)
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if (fxpl)
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c.FXBuf14[e.FXParm >> 4] = fxpl;
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switch (e.FXParm >> 4)
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{
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case 0: // set filter (0x)
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break;
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case 1: // fineslide up (1x)
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c.Period = sMax (113, c.Period - c.FXBuf14[1]);
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break;
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case 2: // slide down (2x)
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c.Period = sMin (856, c.Period + c.FXBuf14[2]);
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break;
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case 3: // set glissando sucks! (0/1)
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break;
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case 4: // set vib waveform (1/2)
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c.VibWave = fxpl & 3;
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if (c.VibWave == 3)
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c.VibWave = 0;
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c.VibRetr = fxpl & 4;
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break;
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case 5: // set finetune
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c.FineTune = fxpl;
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if (c.FineTune >= 8)
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c.FineTune -= 16;
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break;
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case 7: // set tremolo (1/2)
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c.TremWave = fxpl & 3;
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if (c.TremWave == 3)
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c.TremWave = 0;
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c.TremRetr = fxpl & 4;
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break;
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case 9: // retrigger
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if (c.FXBuf14[9] && !e.Note)
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TrigNote (ch, e);
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c.RetrigCount = 0;
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break;
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case 10: // fine volslide up
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c.Volume = sMin (c.Volume + c.FXBuf14[10], 64);
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break;
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case 11: // fine volslide down;
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c.Volume = sMax (c.Volume - c.FXBuf14[11], 0);
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break;
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case 14: // delay pattern
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Delay = c.FXBuf14[14];
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break;
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case 15: // invert loop (WTF)
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break;
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}
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break; // case 14 end
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case 15: // set speed (F)
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if (e.FXParm)
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if (e.FXParm <= 32)
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Speed = e.FXParm;
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else
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CalcTickRate (e.FXParm);
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break;
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}
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}
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else
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{
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switch (e.FX)
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{
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case 0: // arpeggio (or normal play)
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if (e.FXParm)
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{
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sInt no = 0;
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switch (CurTick % 3)
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{
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case 1:
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no = e.FXParm >> 4;
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break;
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case 2:
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no = e.FXParm & 0x0f;
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break;
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}
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c.SetPeriod (no);
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}
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break;
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case 1: // slide up
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c.Period = sMax (113, c.Period - c.FXBuf[1]);
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break;
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case 2: // slide down
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c.Period = sMin (856, c.Period + c.FXBuf[2]);
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break;
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case 5: // Tone Portamento + volume slide slide
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if (c.FXBuf[5] & 0xf0)
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c.Volume = sMin (c.Volume + (c.FXBuf[5] >> 4), 0x40);
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else
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c.Volume = sMax (c.Volume - (c.FXBuf[5] & 0x0f), 0);
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// no break!
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case 3: // tone portamento (slide to note) slide speed
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{
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sInt np = c.GetPeriod ();
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if (c.Period > np)
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c.Period = sMax (c.Period - c.FXBuf[3], np);
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else if (c.Period < np)
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c.Period = sMin (c.Period + c.FXBuf[3], np);
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}
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break;
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case 6: // vibrato plus volslide
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if (c.FXBuf[6] & 0xf0)
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c.Volume = sMin (c.Volume + (c.FXBuf[6] >> 4), 0x40);
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else
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c.Volume = sMax (c.Volume - (c.FXBuf[6] & 0x0f), 0);
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// no break!
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case 4: // vibrato (speed + depth)
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c.SetPeriod (0, VibTable[c.VibWave][c.VibAmpl - 1][c.VibPos]);
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c.VibPos = (c.VibPos + c.VibSpeed) & 0x3f;
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break;
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case 7: // tremolo (rate + depth)
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TremVol = VibTable[c.TremWave][c.TremAmpl - 1][c.TremPos];
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c.TremPos = (c.TremPos + c.TremSpeed) & 0x3f;
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break;
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case 10: // volume slide
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if (c.FXBuf[10] & 0xf0)
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c.Volume = sMin (c.Volume + (c.FXBuf[10] >> 4), 0x40);
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else
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c.Volume = sMax (c.Volume - (c.FXBuf[10] & 0x0f), 0);
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break;
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case 11: // position jump
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if (CurTick == Speed - 1)
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{
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CurRow = -1;
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CurPos = e.FXParm;
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}
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break;
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case 13: // pattern break
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if (CurTick == Speed - 1)
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{
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CurPos++;
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CurRow = (10 * (e.FXParm >> 4) + (e.FXParm & 0x0f)) - 1;
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}
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break;
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case 14: // set filter (special)
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switch (e.FXParm >> 4)
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{
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case 6: // loop pattern
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if (!fxpl) // loop start
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c.LoopStart = CurRow;
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else if (CurTick == Speed - 1)
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{
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if (c.LoopCount < fxpl)
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{
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CurRow = c.LoopStart - 1;
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c.LoopCount++;
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}
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else
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c.LoopCount = 0;
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}
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break;
|
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case 9: // set sample offset (re-trigger)
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if (++c.RetrigCount == c.FXBuf14[9])
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{
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c.RetrigCount = 0;
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TrigNote (ch, e);
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}
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break;
|
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case 12: // set volume
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if (CurTick == c.FXBuf14[12])
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c.Volume = 0;
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break;
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case 13: // pattern break
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if (CurTick == c.FXBuf14[13])
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TrigNote (ch, e);
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break;
|
||||
|
||||
}
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break;
|
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}
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}
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|
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v.Volume = sClamp (c.Volume + TremVol, 0, 64);
|
||||
v.Period = c.Period;
|
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}
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CurTick++;
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if (CurTick >= Speed * (Delay + 1))
|
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{
|
||||
CurTick = 0;
|
||||
CurRow++;
|
||||
Delay = 0;
|
||||
}
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||||
if (CurRow >= 64)
|
||||
{
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CurRow = 0;
|
||||
CurPos++;
|
||||
}
|
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if (CurPos >= PositionCount)
|
||||
CurPos = 0;
|
||||
}; // end tick routine
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||||
|
||||
// ************ MODPLAYER CONSTRUCTOR ************
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||||
public:
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||||
char Name[21]; // song name
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||||
|
||||
ModPlayer (Paula *p, sU8 *moddata) : P (p) // ModPlayer constructor (paula object and MOD data)
|
||||
{
|
||||
for (sInt ft = 0; ft < 16; ft++) // calc ptable (period table) - finetune
|
||||
{
|
||||
sInt rft = -((ft >= 8) ? ft - 16 : ft);
|
||||
sF32 fac = sFPow (2.0f, sF32 (rft) / (12.0f * 16.0f));
|
||||
for (sInt i = 0; i < 60; i++)
|
||||
PTable[ft][i] = sInt (sF32 (BasePTable[i]) * fac + 0.5f);
|
||||
}
|
||||
|
||||
for (sInt ampl = 0; ampl < 15; ampl++) // calc vibtable - vibrato amplitude
|
||||
{
|
||||
sF32 scale = ampl + 1.5f;
|
||||
sF32 shift = 0;
|
||||
for (sInt x = 0; x < 64; x++)
|
||||
{
|
||||
VibTable[0][ampl][x] = sInt (scale * sFSin (x * sFPi / 32.0f) + shift);
|
||||
VibTable[1][ampl][x] = sInt (scale * ((63 - x) / 31.5f - 1.0f) + shift);
|
||||
VibTable[2][ampl][x] = sInt (scale * ((x < 32) ? 1 : -1) + shift);
|
||||
}
|
||||
}
|
||||
// == "load" the mod
|
||||
memcpy (Name, moddata, 20); // copy from source to destination
|
||||
Name[20] = 0;
|
||||
moddata += 20; // begining of sample data
|
||||
|
||||
SampleCount = 32; // 32 samples (default was 16)
|
||||
ChannelCount = 4; // 4 channels
|
||||
Samples = (Sample *)(moddata - sizeof (Sample));
|
||||
moddata += 15 * sizeof (Sample); // number of positions
|
||||
sU32 &tag = *(sU32 *)(moddata + 130 + 16 * sizeof (Sample)); // get tag info (treat result as unsigned 32 then dereference)
|
||||
switch (tag) // magic number / signature / i.d. / tag string
|
||||
{
|
||||
case '.K.M': // Michael Kleps (M.K.)
|
||||
case '4TLF': // Startrekker 4 channel (fairlight) (FLT4)
|
||||
case '!K!M': // more than 100 patterns (M!K!)
|
||||
SampleCount = 32; // 32 samples if M.K. FLT4, M!K!
|
||||
break;
|
||||
}
|
||||
if (SampleCount > 16)
|
||||
moddata += (SampleCount - 16) * sizeof (Sample); // moddata=moddata+(Sampl.......
|
||||
|
||||
for (sInt i = 1; i < SampleCount; i++)
|
||||
Samples[i].Prepare ();
|
||||
|
||||
PositionCount = *moddata;
|
||||
moddata += 2; // + skip unused byte
|
||||
memcpy (PatternList, moddata, 128);
|
||||
moddata += 128;
|
||||
if (SampleCount > 15)
|
||||
moddata += 4; // skip tag
|
||||
|
||||
PatternCount = 0;
|
||||
for (sInt i = 0; i < 128; i++)
|
||||
PatternCount = sClamp (PatternCount, PatternList[i] + 1, 128);
|
||||
|
||||
for (sInt i = 0; i < PatternCount; i++)
|
||||
{
|
||||
Patterns[i].Load (moddata);
|
||||
moddata += 1024;
|
||||
}
|
||||
|
||||
sZeroMem (SData, sizeof (SData)); // zap memory?
|
||||
for (sInt i = 1; i < SampleCount; i++)
|
||||
{
|
||||
SData[i] = (sS8 *)moddata;
|
||||
moddata += 2 * Samples[i].Length;
|
||||
}
|
||||
|
||||
Reset ();
|
||||
} // ModPlayer constructor end
|
||||
|
||||
// ************ RENDER output************
|
||||
sU32 Render (sF32 *buf, sU32 len) // Render paramaters (pointer to buffer and length of buffer)
|
||||
{
|
||||
while (len)
|
||||
{
|
||||
sInt todo = sMin<sInt> (len, TRCounter); // sMin function using template
|
||||
|
||||
if (todo)
|
||||
{
|
||||
P->Render (buf, todo); // paula buffer and todo
|
||||
buf += 2 * todo;
|
||||
len -= todo;
|
||||
TRCounter -= todo; // tick rate counter
|
||||
}
|
||||
else
|
||||
{
|
||||
Tick ();
|
||||
TRCounter = TickRate;
|
||||
}
|
||||
}
|
||||
return 1;
|
||||
} // Render end
|
||||
|
||||
// ************ CALLBACK FUNCTION ************
|
||||
static sU32 __stdcall RenderProxy (void *parm, sF32 *buf, sU32 len) // (modplayer is parm)
|
||||
{
|
||||
return ((ModPlayer *)parm)->Render (buf, len); // typecast void pointer (parm) into modplayer object and access 'Render' member.
|
||||
} // (returns buffer to the audio out)
|
||||
};
|
||||
|
||||
// ************ PERIOD TABLE ************
|
||||
|
||||
sInt ModPlayer::BasePTable[61] = // scope resolution (belongs to ModPlayer class)
|
||||
{
|
||||
0, // finetune = 0
|
||||
1712, 1616, 1525, 1440, 1357, 1281, 1209, 1141, 1077, 1017, 961, 907, // C-0 to B-0 (octave 0)
|
||||
856, 808, 762, 720, 678, 640, 604, 570, 538, 508, 480, 453, // C-1 to B-1 (octave 1)
|
||||
428, 404, 381, 360, 339, 320, 302, 285, 269, 254, 240, 226, // C-2 to B-2 (octave 2)
|
||||
214, 202, 190, 180, 170, 160, 151, 143, 135, 127, 120, 113, // C-3 to B-3 (octave 3)
|
||||
107, 101, 95, 90, 85, 80, 76, 71, 67, 64, 60, 57, // C-4 to B-4 (octave 4)
|
||||
};
|
||||
|
||||
sInt ModPlayer::PTable[16][60];
|
||||
sInt ModPlayer::VibTable[3][15][64];
|
||||
Reference in New Issue
Block a user