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decay, fix echo volume artifacts

This commit is contained in:
Joachim Fenkes 2012-08-08 22:15:46 +02:00
parent accd29361d
commit 1eda2f81f9
1 changed files with 20 additions and 9 deletions
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29
win/main.cpp
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@ -6,6 +6,11 @@
#include <MMSystem.h>
#include "binary.h"
static inline uint8_t THREEQUARTERS(uint8_t x)
{
return (x >> 2) + (x >> 1);
}
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 };
int arpeggio[][4] = {
@ -51,8 +56,8 @@ int bassline[BASSSIZE] = {
8, 8, 10, 10, 12, 12, 5, 5, 8, 8, 10, 10,
};
#define LEADSIZE 158
int leadmelody[LEADSIZE] = { 0, //0, 0,
#define LEADSIZE 159
int leadmelody[LEADSIZE] = { 0, 0, 0, 0,
12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 10, 0, 7, 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, 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, 5, 7, 3, 1, 0,
@ -60,7 +65,7 @@ int leadmelody[LEADSIZE] = { 0, //0, 0,
8, 3, 0, 8, 10, 12, 14, 15, 19, 17, 0, 12, 7, 0, 12, 14, 15, 14, 15, 19, 17, 0,
8, 3, 0, 8, 10, 12, 14, 15, 19, 17, 15, 0, 14, 15, 17, 19, 0, 15, 14, 15, 12,
};
int leadtiming[LEADSIZE] = { 0, //131, 125,
int leadtiming[LEADSIZE] = { 0, 62, 200, 250,
4, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 4, 2, 4, 4, 2, 4, 6, 56,
4, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 4, 2, 4, 4, 2, 4, 6, 56,
4, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 4, 2, 4, 4, 2, 4, 6, 56,
@ -74,33 +79,39 @@ struct leadvoice_s {
uint16_t osc;
} leads[3] = {
{ 0, 1, 0 },
{ 0, 3, 0 },
{ 0, 5, 0 },
{ 0, 3, 1601 },
{ 0, 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 (0 == (i & 0x0FF))
boosts &= ~(1 << voice_nr);
if (0 == (i & 0x1FF))
leadtimer--;
if (0 == leadtimer)
{
leadptr++;
if (leadptr == LEADSIZE)
leadptr = 2;
leadptr = 3;
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 : ((lead_osc >> 6) & 0x7F) + ((lead_osc >> 6) & 0x3F);// + ((lead_flange >> 6) & 0x3F); // xor also sounds cool
return (!melody) ? 0 : ((boosts & (1 << voice_nr)) ? sample : THREEQUARTERS(sample));
}
static inline unsigned char voice_arp(unsigned long i)
@ -126,12 +137,12 @@ static inline unsigned char voice_bass(unsigned long i)
void fill(char *data)
{
static unsigned long i = 0x40000;
static unsigned long i = 0;//x40000;
static uint8_t max = 0;
for (int j = 0; j < 4096; j++)
{
unsigned char sample = (voice_lead(i, 0) >> 1) + ((voice_lead(i, 1) >> 4) * 3) + (voice_lead(i, 2) >> 3) + (voice_bass(i) >> 2) + (voice_arp(i) >> 2);
unsigned char sample = (voice_lead(i, 0) >> 1) + THREEQUARTERS(voice_lead(i, 1) >> 2) + (voice_lead(i, 2) >> 3) + (voice_bass(i) >> 2) + (voice_arp(i) >> 2);
data[j] = sample;
if (sample > max)
{