228 lines
6.3 KiB
C++
228 lines
6.3 KiB
C++
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <malloc.h>
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#include <Windows.h>
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#include <MMSystem.h>
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#include "binary.h"
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static inline uint8_t THREEQUARTERS(uint8_t x)
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{
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return (x >> 2) + (x >> 1);
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}
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const int notes[37] = { 134, 142, 150, 159, 169, 179, 189, 201, 213, 225, 239, 253, 268, 284, 301, 319, 338, 358, 379, 401, 425, 451, 477, 506, 536, 568, 601, 637, 675, 715, 758, 803, 851, 901, 955, 1011, 1072 };
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const uint8_t arpnotes[] = {
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8, 10, 12, 14, 15, 17, 19, 20, 21, 22, 24, 26, 27, 29,
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};
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const uint16_t arpeggio[][2] = {
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{ 0x24, 0x6A },
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{ 0x46, 0x9C },
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{ 0x13, 0x59 },
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{ 0x02, 0x47 },
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{ 0x24, 0x59 },
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{ 0x24, 0x58 },
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{ 0x57, 0xAD },
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{ 0x35, 0x9B }
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};
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#define ARPSIZE 76
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#if 0
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uint8_t arpseq1[4][8] = {
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{ 0, 0, 1, 2, 0, 0, 6, 2, },
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{ 0, 0, 1, 2, 0, 0, 1, 7, },
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{ 0, 0, 1, 2, 0, 0, 1, 2, },
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{ 3, 3, 2, 2, 0, 0, 4, 5, },
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};
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#else
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const uint8_t arpseq1[4][4] = {
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{ 0x00, 0x12, 0x00, 0x62 },
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{ 0x00, 0x12, 0x00, 0x17 },
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{ 0x00, 0x12, 0x00, 0x12 },
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{ 0x33, 0x22, 0x00, 0x45 },
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};
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#endif
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const int arpseq2[] = { 0, 1, 0, 1, 0, 1, 0, 2, 3, 3 };
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//int arptiming[32] = { 4, 2, 4, 2, 4, 2, 4, 5, 1, 2, 2 }
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const uint32_t arptiming = B32(00001100,00110000,11111011,00001100);
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#define BASSSIZE ARPSIZE
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const int bassbeat[8] = { 0, 0, 1, 0, 0, 1, 0, 1 };
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const int bassline[BASSSIZE] = {
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12, 12, 15, 10, 12, 12, 17, 10, 12, 12, 15, 7, 8, 8, 3, 7,
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8, 8, 10, 10, 12, 12, 5, 5, 8, 8, 10, 10,
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};
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const uint8_t leadnotes[] = {
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0xFF, 0, 3, 5, 7, 8, 10, 12, 14, 15, 17, 19, 20, 22, 24, 26, 27
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};
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const uint8_t leadtimes[] = {
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1, 2, 3, 4, 5, 6, 28, 56
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};
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#define LEADSIZE 180
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const int leadmelody[LEADSIZE] = {
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12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 10, 0, 7, 0, 5, 7, 3, 1, 0,
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12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 15, 0, 17, 19, 0, 22, 0, 24, 26, 27, 24, 0,
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12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 10, 0, 7, 0, 5, 7, 3, 1, 0,
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12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 15, 0, 17, 19, 0, 22, 0, 24, 26, 24, 20, 0,
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8, 3, 0, 8, 10, 12, 0, 14, 15, 19, 17, 0, 12, 7, 0, 12, 14, 15, 0, 14, 15, 19, 17, 0,
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8, 3, 0, 8, 10, 12, 14, 0, 15, 19, 17, 15, 0, 14, 15, 17, 19, 0, 15, 14, 15, 12,
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};
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const int leadtiming[LEADSIZE] = {
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4, 2, 2, 2, 2, 2, 5, 1, 2, 2, 2, 2, 2, 5, 1, 2, 2, 2, 2, 2, 5, 1, 3, 1, 4, 2, 4, 6, 56,
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4, 2, 2, 2, 2, 2, 5, 1, 2, 2, 2, 2, 2, 5, 1, 2, 2, 2, 2, 2, 5, 1, 3, 1, 4, 2, 4, 6, 56,
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4, 2, 2, 2, 2, 2, 5, 1, 2, 2, 2, 2, 2, 5, 1, 2, 2, 2, 2, 2, 5, 1, 3, 1, 4, 2, 4, 6, 56,
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4, 2, 2, 2, 2, 2, 5, 1, 2, 2, 2, 2, 2, 5, 1, 2, 2, 2, 2, 2, 5, 1, 3, 1, 4, 2, 4, 6, 56,
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4, 2, 2, 4, 2, 5, 1, 4, 4, 2, 6, 28, 4, 2, 2, 4, 2, 5, 1, 4, 4, 2, 6, 28,
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4, 2, 2, 4, 2, 6, 2, 2, 4, 2, 6, 2, 2, 4, 2, 6, 2, 2, 4, 2, 4, 4,
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};
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struct leadvoice_s {
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uint8_t ptr, timer;
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uint16_t osc;
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} leads[3] = {
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{ LEADSIZE, 1, 0 },
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{ LEADSIZE, 3, 1601 },
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{ LEADSIZE, 5, 3571 },
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};
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uint8_t boosts;
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static unsigned char voice_lead(unsigned long i, int voice_nr)
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{
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#define leadptr leads[voice_nr].ptr
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#define lead_osc leads[voice_nr].osc
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#define leadtimer leads[voice_nr].timer
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if (leadptr == LEADSIZE)
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{
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if (i == (0x40000 + 0x400 * voice_nr))
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{
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leadptr = -1;
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leadtimer = 1;
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}
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else
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return 0;
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}
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if (0 == (i & 0x0FF))
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boosts &= ~(1 << voice_nr);
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if (0 == (i & 0x1FF))
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leadtimer--;
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if (0 == leadtimer)
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{
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leadptr++;
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leadtimer = leadtiming[leadptr];
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boosts |= 1 << voice_nr;
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}
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uint8_t melody = leadmelody[leadptr];
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int note = notes[melody == 1 ? 0 : melody]; // TODO remove this hack by using note table
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lead_osc += note;
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// lead_flange += note + (i & 1);
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uint8_t sample = ((lead_osc >> 6) & 0x7F) + ((lead_osc >> 6) & 0x3F);// + ((lead_flange >> 6) & 0x3F); // xor also sounds cool
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//return (!melody) ? 0 : ((lead_osc >> 5) & 0x80) + ((lead_flange >> 6) & 0x3F);
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//return (!melody) ? 0 : ((lead_osc & 0x1000) ? ((lead_osc >> 6) & 0x3F) | 0xC0 : 0x40 - ((lead_osc >> 6) & 0x3F));
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return (!melody) ? 0 : ((boosts & (1 << voice_nr)) ? sample : THREEQUARTERS(sample));
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}
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static inline unsigned char voice_arp(unsigned long i)
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{
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static uint16_t arp_osc = 0;
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uint8_t arpptr = i >> 13;
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uint8_t arpptr2 = arpseq1[arpseq2[arpptr >> 3]][(arpptr >> 1) & 3];
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if (!(arpptr & 1))
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arpptr2 >>= 4;
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arpptr = arpeggio[arpptr2 & 0xF][(i >> 8) & 1];
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if (!(i & 0x80))
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arpptr >>= 4;
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int note = notes[arpnotes[arpptr & 0xF]];
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arp_osc += note;
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return ((arptiming & (1 << (31 - (i >> 9)))) && (arp_osc & (1 << 12)) && ((i >> 13) > 15)) ? 0 : 140;
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//return ((arp_osc >> 5) & 128) - 1;
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}
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static inline unsigned char voice_bass(unsigned long i)
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{
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static uint16_t bassosc = 0, flangeosc = 0;
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uint8_t bassptr = (i >> 13) & 0xF;
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if (i >> 19)
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bassptr |= 0x10;
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int note = notes[bassline[bassptr]];
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if (bassbeat[(i >> 10) & 7])
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note <<= 1;
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bassosc += note;
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flangeosc += note + 1;
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unsigned char ret = ((bassosc >> 8) & 0x7F) + ((flangeosc >> 8) & 0x7F);
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return ((i >> 6) & 0xF) == 0xF ? 0 : ret;
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}
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static inline uint8_t next_sample()
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{
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static unsigned long i = 0;//x40000;
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uint8_t ret = (voice_lead(i, 0) >> 1) + THREEQUARTERS(voice_lead(i, 1) >> 2) + (voice_lead(i, 2) >> 3) + (voice_bass(i) >> 2) + (voice_arp(i) >> 2);
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i++;
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if ((i >> 13) == ARPSIZE)
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i = 16 << 13;
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return ret;
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}
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void fill(uint8_t *data)
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{
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static uint8_t max = 0;
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for (int j = 0; j < 4096; j++)
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{
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data[j] = next_sample();
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if (data[j] > max)
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{
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max = data[j];
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printf("%x\n", max);
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}
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}
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}
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static const WAVEFORMATEX fmt = {
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WAVE_FORMAT_PCM, 1, 8000, 8000, 1, 8, 0
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};
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int main(int argc, char *argv[])
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{
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HWAVEOUT out;
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HRESULT rc = waveOutOpen(&out, WAVE_MAPPER, &fmt, NULL, NULL, CALLBACK_NULL);
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if (rc != MMSYSERR_NOERROR)
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{
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printf("error %d on open\n");
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exit(1);
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}
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WAVEHDR bufs[2] = {
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{ (char *)malloc(4096), 4096 },
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{ (char *)malloc(4096), 4096 },
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};
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int i = 0;
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fill((uint8_t *)bufs[i].lpData);
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bufs[i].dwFlags = WHDR_PREPARED;
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waveOutPrepareHeader(out, bufs + i, sizeof(WAVEHDR));
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waveOutWrite(out, bufs + i, sizeof(WAVEHDR));
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i ^= 1;
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while (!(GetAsyncKeyState(VK_ESCAPE) & 1))
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{
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fill((uint8_t *)bufs[i].lpData);
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bufs[i].dwFlags = WHDR_PREPARED;
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waveOutPrepareHeader(out, bufs + i, sizeof(WAVEHDR));
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waveOutWrite(out, bufs + i, sizeof(WAVEHDR));
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i ^= 1;
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while (waveOutUnprepareHeader(out, bufs + i, sizeof(WAVEHDR)) == WAVERR_STILLPLAYING);
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}
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} |