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