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#include <rtosc/rtosc.h>
#include <rtosc/thread-link.h>
#include <rtosc/ports.h>
#include <rtosc/miditable.h>
#include <string.h>
#include <cmath>
#include "synth.h"
#include <rtosc/port-sugar.h>
#include <rtosc/subtree-serialize.h>
using namespace rtosc;
float Fs = 0.0f;
ThreadLink bToU(1024,1024);
ThreadLink uToB(1024,1024);
#define rObject Adsr
Ports Adsr::ports = {
rParamF(av, rLinear(-1,1), "attack value"),
rParamF(dv, rLinear(-1,1), "decay value"),
rParamF(sv, rLinear(-1,1), "sustain value"),
rParamF(rv, rLinear(-1,1), "release value"),
rParamF(at, rLog(1e-3,10), "attach time"),
rParamF(dt, rLog(1e-3,10), "decay time"),
rParamF(rt, rLog(1e-3,10), "release time"),
};
//sawtooth generator
float oscil(float freq)
{
static float phase = 0.0f;
phase += freq/Fs;
if(phase > 1.0f)
phase -= 1.0f;
return phase;
}
inline float Synth::sample(void)
{
return oscil(freq*(1+frq_env(gate))/2.0f)*(1+amp_env(gate))/2.0f;
}
float interp(float a, float b, float pos)
{
return (1.0f-pos)*a+pos*b;
}
//Linear ADSR
float Adsr::operator()(bool gate)
{
time += 1.0/Fs;
if(gate == false && pgate == true)
relval = (*this)(true);
if(gate != pgate)
time = 0.0f;
pgate = gate;
float reltime = time;
if(gate) {
if(at > reltime) //Attack
return interp(av, dv, reltime/at);
reltime -= at;
if(dt > reltime) //Decay
return interp(dv, sv, reltime/dt);
return sv; //Sustain
}
if(rt > reltime) //Release
return interp(relval, rv, reltime/rt);
return rv;
}
MidiTable midi(Synth::ports);
char serial[2048];
size_t serial_size;
Synth s;
void process_control(unsigned char control[3]);
#undef rObject
#define rObject Synth
rtosc::Ports Synth::ports = {
rRecur(amp_env, "amplitude envelope"),
rRecur(frq_env, "frequency envelope"),
rParamF(freq, rLog(1,1e3), "note frequency"),
rToggle(gate, "Note enable"),
midi.registerPort(),
midi.learnPort(),
midi.unlearnPort(),
{"echo:s", ":internal\0", NULL, [](const char *msg, RtData &d)
{
d.reply(rtosc_argument(msg, 0).s);
}},
{"save", ":internal\0", NULL, [](const char *, RtData &data)
{
fprintf(stderr, "saving...\n");
serial_size = subtree_serialize(serial, sizeof(serial),
data.obj, &Synth::ports);
}},
{"load", ":internal\0", NULL, [](const char *, RtData &data)
{
memset(data.loc, 0, data.loc_size);
fprintf(stderr, "loading...\n");
subtree_deserialize(serial, serial_size, data.obj, &Synth::ports, data);
}},
};
Ports *root_ports = &Synth::ports;
float &freq = s.freq;
bool &gate = s.gate;
void event_cb(msg_t m)
{
char buffer[1024];
rtosc::RtData d;
d.loc = buffer;
d.loc_size = 1024;
d.obj = (void*) &s;
Synth::ports.dispatch(m+1, d);
bToU.raw_write(m);
puts("event-cb");
if(rtosc_type(m,0) == 'f')
printf("%s -> %f\n", m, rtosc_argument(m,0).f);
if(rtosc_type(m,0) == 'i')
printf("%s -> %d\n", m, rtosc_argument(m,0).i);
}
void modify_cb(const char *action, const char *path, const char *, int ch, int cc)
{
if(!strcmp(action, "ADD") || !strcmp(action, "REPLACE"))
bToU.write("/midi/add", "sii", path, ch, cc);
else if(!strcmp(action, "DEL"))
bToU.write("/midi/remove", "s", path);
}
#include <err.h>
void synth_init(void)
{
printf("%p\n", Adsr::ports["dv"]->metadata);
printf("'%d'\n", Adsr::ports["dv"]->metadata[0]);
if(strlen(Adsr::ports["dv"]->metadata)<3)
errx(1,"bad metadata");
midi.event_cb = event_cb;
midi.modify_cb = modify_cb;
}
void process_control(unsigned char ctl[3])
{
midi.process(ctl[0]&0x0F, ctl[1], ctl[2]);
}
class DispatchData:public rtosc::RtData
{
public:
DispatchData(void)
{
memset(buffer, 0, 1024);
loc = buffer;
loc_size = 1024;
obj = &s;
}
char buffer[1024];
void reply(const char *path, const char *args, ...)
{
va_list va;
va_start(va,args);
const size_t len =
rtosc_vmessage(bToU.buffer(),bToU.buffer_size(),path,args,va);
if(len)
bToU.raw_write(bToU.buffer());
va_end(va);
}
void reply(const char *msg)
{
bToU.raw_write(msg);
}
void broadcast(const char *path, const char *args, ...)
{
bToU.write("/broadcast","");
va_list va;
va_start(va,args);
const size_t len =
rtosc_vmessage(bToU.buffer(),bToU.buffer_size(),path,args,va);
if(len)
bToU.raw_write(bToU.buffer());
va_end(va);
}
void broadcast(const char *msg)
{
bToU.write("/broadcast","");
bToU.raw_write(msg);
}
};
void process_output(float *smps, unsigned nframes)
{
DispatchData d;
while(uToB.hasNext()) {
Synth::ports.dispatch(uToB.read()+1, d);
fprintf(stderr, "backend '%s'\n", uToB.peak());
}
for(unsigned i=0; i<nframes; ++i)
smps[i] = s.sample();
}
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