Subversion Repositories DIN Is Noise

/*
* sounder.cc
* DIN Is Noise is copyright (c) 2006-2017 Jagannathan Sampath
* For more information, please visit http://dinisnoise.org/
*/

#include "sounder.h"
#include "audio.h"
#include "console.h"

extern void hz2step (float& hz, float& step);

sounder::sounder (multi_curve* wav, const std::string& _name, float _hz, float _l, float _r, int _bias, float _fadet) {
  name = _name;
  l = r = 0.0f;
  soll (wav);
  solr (wav);
  playl.set_wave (&soll);
  playr.set_wave (&solr);
  set_hz (_hz);
  set_vol (_l, _r, _bias, _fadet);
}

void sounder::set_vol (float _l, float _r, int _b, float _t) {
  lprev = l;
  rprev = r;
  l = _l;
  r = _r;
  bias = _b;
  fading = 1;
}

void sounder::render (float* L, float* R, float* fdr_alphas) {
  play* pl[] = {&playl, &playr};
  float* out[] = {L, R};
  float* outb[] = {aout.bufL, aout.bufR};
  float v[] = {l, r};
  float vprev[] = {lprev, rprev};
  float* vb[] = {aout.fdrL, aout.fdrR};
  for (int i = 0; i < 2; ++i) {
    float* outi = out[i];
    float* outbi = outb[i];
    memset (outbi, 0, aout.samples_channel_size);
    play* pli = pl[i];
    if (fading) {
      calc_fader (vb[i], fdr_alphas, aout.samples_per_channel, vprev[i], v[i]);
      pli->gen_wav_mix (outbi, vb[i], aout.samples_per_channel);
    } else pli->gen_wav_mix (outbi, v[i], aout.samples_per_channel);
    for (int j = 0, k = aout.samples_per_channel; j < k; ++j) outi[j] += outbi[j];
  }
}

void sounder::set_hz (float _hz) {
  hz = _hz; hz2step (hz, step);
  playl.fill_pitch (step);
  playr.fill_pitch (step);
}

void sounder::eval_fade () {
  int before = fdr.on, after;
  if (before) {
    after = fdr.eval ();
    if (after != before) if (--NUM_FADERS < 0) NUM_FADERS = 0;
    if (bias == LEFT) l = fdr.value ();  else r = fdr.value ();
  }
}

void sounder::calc_fader (float* out, float* alpha, int n, float v1, float v2) {
  float dv = v2 - v1;
  for (int i = 0; i < n; ++i) {
    float ai = alpha[i];
    out[i] = v1 + ai * dv;
  }
}

void sounder::clear_fading () {
  fading = 0;
}