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new chan osc work in progress

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tildearrow 2025-03-01 05:05:50 -05:00
parent 0eea0ec139
commit dd7e1def3d
11 changed files with 171 additions and 74 deletions
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65
src/engine/dispatch.h
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@ -424,40 +424,79 @@ struct DivSamplePos {
freq(0) {}
};
constexpr uintmax_t OSCBUF_PREC=(sizeof(uintmax_t)>=8)?32:16;
constexpr uintmax_t OSCBUF_MASK=(1UL<<OSCBUF_PREC)-1;
// the actual output of all DivDispatchOscBuffer instanced runs at 65536Hz.
struct DivDispatchOscBuffer {
bool follow;
unsigned int rate;
size_t rateMul;
uintmax_t rate;
uintmax_t rateMul;
unsigned int needleSub;
unsigned short needle;
unsigned short readNeedle;
unsigned short followNeedle;
unsigned short lastSample;
bool follow;
short data[65536];
// TODO: all of this
inline void putSample(unsigned short pos, short val) {
unsigned short realPos=needle+pos;
if (val==0xffff) {
data[needle+pos]=0xfffe;
inline void putSample(uintmax_t pos, short val) {
unsigned short realPos=needle+((needleSub+pos*rateMul)>>OSCBUF_PREC);
if (val==-1) {
data[realPos]=0xfffe;
return;
}
data[needle+pos]=val;
lastSample=val;
data[realPos]=val;
}
inline void begin(unsigned short len) {
uintmax_t calc=(needleSub+len*rateMul)>>OSCBUF_PREC;
unsigned short start=needle;
unsigned short end=needle+calc;
if (end<start) {
logE("ELS %d %d %d",end,start,calc);
memset(&data[start],-1,(0x10000-start)*sizeof(short));
memset(data,-1,end*sizeof(short));
data[needle]=lastSample;
return;
}
memset(&data[start],-1,calc*sizeof(short));
data[needle]=lastSample;
}
inline void end(unsigned short len) {
needle+=len;
uintmax_t calc=len*rateMul;
if (((calc&OSCBUF_MASK)+needleSub)>=(OSCBUF_MASK+1UL)) {
needle++;
}
needleSub=(needleSub+calc)&OSCBUF_MASK;
needle+=calc>>OSCBUF_PREC;
data[needle]=lastSample;
}
void reset() {
memset(data,-1,65536*sizeof(short));
needle=0;
readNeedle=0;
followNeedle=0;
needleSub=0;
lastSample=0;
}
void setRate(unsigned int r) {
double rateMulD=65536.0/(double)r;
rateMulD*=(double)(1UL<<OSCBUF_PREC);
rate=r;
rateMul=(uintmax_t)rateMulD;
}
DivDispatchOscBuffer():
follow(true),
rate(65536),
rateMul(1UL<<OSCBUF_PREC),
needleSub(0),
needle(0),
readNeedle(0),
followNeedle(0) {
memset(data,0,65536*sizeof(short));
followNeedle(0),
lastSample(0),
follow(true) {
memset(data,-1,65536*sizeof(short));
}
};