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#include "Sfz.hpp"
#include <iostream>
#include <fstream>
#include <string>
#define BLOCK_SIZE 512
void Sfz::readsamples(SNDFILE *infile,
int channels, int note, int layer)
{
float buf[channels*BLOCK_SIZE];
int k, m, readcount, i;
i = 0;
while (i < MAX_SAMPLES && (readcount = sf_readf_float (infile, buf, BLOCK_SIZE)) > 0) {
for (k = 0 ; k < readcount ; k++) {
for (m = 0 ; m < channels ; m++) {
sample[note][layer][m][i+k] = buf[k*channels + m];
}
}
i += readcount;
}
}
Sfz::Sfz()
{
}
void Sfz::clearsamples()
{
int i,j,k;
for (i = 0; i < 128; i++) {
for (j = 0; j < MAX_LAYERS; j++) {
for (k = 0; k < MAX_SAMPLES; k++) {
sample[i][j][0][k] = 0.f;
sample[i][j][1][k] = 0.f;
}
}
}
for (i = 0; i < 128; i++) {
layers[i].max = 0;
for (j = 0; j < MAX_LAYERS; j++) {
layers[i].l[j].lovel = 0;
layers[i].l[j].hivel = 0;
layers[i].l[j].lokey = 0;
layers[i].l[j].hikey = 0;
}
}
}
void Sfz::loadsamples(std::string path, std::string filename)
{
int note, i, j, k, key;
::sfz::SFZParser sfzfile;
std::string fullsfzpath = path + std::string("/") + filename;
if (sfzfile.readsfz(fullsfzpath) == -1) {
printf("Can't open SFZ\n");
return;
}
::sfz::Instrument* sfzinstrument = &sfzfile.instrument;
SNDFILE *infile = NULL;
SF_INFO sfinfo;
int maxregions = sfzinstrument->regions.size();
if (maxregions == 0) {
printf("No samples found\n");
} else {
for (i = 0; i < maxregions; i++) {
for (note = 0; note < 128; note++) {
if (sfzinstrument->regions[i]->lokey == sfzinstrument->regions[i]->hikey) {
key = sfzinstrument->regions[i]->lokey;
} else {
key = sfzinstrument->regions[i]->pitch_keycenter;
}
if (note == key) {
layers[note].keymiddle = key;
layers[note].dsemitones = 0;
infile = NULL;
std::string fullsamplepath = path + std::string("/") + sfzinstrument->regions[i]->sample;
if ((infile = sf_open(fullsamplepath.c_str(), SFM_READ, &sfinfo)) == NULL) {
printf("Missing samples\n");
puts (sf_strerror (NULL));
printf("File: %s\n",fullsamplepath.c_str());
}
readsamples (infile, sfinfo.channels, note, layers[note].max);
k = layers[note].max;
layers[note].l[k].lovel = sfzinstrument->regions[i]->lovel;
layers[note].l[k].hivel = sfzinstrument->regions[i]->hivel;
layers[note].l[k].lokey = sfzinstrument->regions[i]->lokey;
layers[note].l[k].hikey = sfzinstrument->regions[i]->hikey;
sf_close (infile);
printf("N-%d V-%d %s\n", note, k, sfzinstrument->regions[i]->sample.c_str());
layers[note].max++;
continue;
} else if (sfzinstrument->regions[i]->lokey <= note && sfzinstrument->regions[i]->hikey >= note) {
layers[note].keymiddle = key;
layers[note].dsemitones = note - key;
//printf("MainKey=%d NoteShiftTo=%d\n", key, note);
}
}
}
printf("All samples loaded, Woot!\n");
}
for (i = 0; i < 128; i++) {
if (!(layers[i].keymiddle == i)) {
k = layers[i].keymiddle;
layers[i].max = layers[k].max;
for (j = 0; j < layers[i].max; j++) {
layers[i].l[j].lovel = layers[k].l[j].lovel;
layers[i].l[j].hivel = layers[k].l[j].hivel;
}
}
}
}
void Sfz::pitchshiftsamples(int srate)
{
::RubberBand::RubberBandStretcher* rbl = NULL;
::RubberBand::RubberBandStretcher* rbr = NULL;
int i,j;
for (i = 0; i < 128; i++) {
//printf("i=%d ds=%d\n", i, layers[i].dsemitones);
if (!(layers[i].dsemitones == 0)) {
int ii = layers[i].keymiddle;
printf("Pitch shifting... %d\n", layers[i].dsemitones);
for (j = 0; j < layers[ii].max; j++) {
float const * const inl[] = {sample[ii][j][0]};
float const * const inr[] = {sample[ii][j][1]};
float * const outl[] = {sample[i][j][0]};
float * const outr[] = {sample[i][j][1]};
rbl = new ::RubberBand::RubberBandStretcher(srate, 1, 0, 1.0, pow(2.0, layers[i].dsemitones / 12.));
rbr = new ::RubberBand::RubberBandStretcher(srate, 1, 0, 1.0, pow(2.0, layers[i].dsemitones / 12.));
rbl->setMaxProcessSize(MAX_SAMPLES);
rbr->setMaxProcessSize(MAX_SAMPLES);
rbl->setExpectedInputDuration(MAX_SAMPLES);
rbr->setExpectedInputDuration(MAX_SAMPLES);
rbl->process(inl, MAX_SAMPLES, true);
rbr->process(inr, MAX_SAMPLES, true);
rbl->retrieve(outl, MAX_SAMPLES);
rbr->retrieve(outr, MAX_SAMPLES);
delete rbl;
delete rbr;
}
}
}
}
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