Exemplo n.º 1
0
  public void analyze(int start) {
    diffs.clear();

    loopStart = start;
    int SUB = 64;
    int N = 2048 * SUB;
    float maxDiff = 0;
    int upper = (int) min(samples.length - N, start + 30 * jingle.getFormat().getSampleRate());
    for (int i = start + N; i < upper - N; i++) {
      if (i % 10000 == 0) System.out.println(i + "/" + (upper - start));
      float diff = 0;
      for (int j = 0; j < N; j += SUB) {
        diff += Math.abs(samples[i + j] - samples[start + j]);
      }
      maxDiff = max(maxDiff, diff);
      diffs.put(i, new PVector(i, diff));
    }

    preview.beginDraw();
    preview.clear();
    preview.noFill();
    preview.stroke(255);
    preview.beginShape();
    for (int i = 0; i <= width; i++) {
      preview.vertex(
          i, preview.height / 2 + height / 2 * samples[(int) (i * (samples.length - 1l) / width)]);
    }
    preview.endShape();
    preview.endDraw();

    preview.beginDraw();
    preview.clear();
    preview.stroke(255, 0, 0);
    preview.beginShape();
    int n = 0;
    int prevX = 0;
    float sum = maxDiff;
    for (PVector diff : diffs.values()) {
      int x = (int) (diff.x * (long) width / samples.length);
      sum = min(diff.y, sum);
      n = 1;
      if (x != prevX) {
        preview.vertex(x, preview.height * sum / maxDiff / n);
        n = 0;
        sum = maxDiff;
        prevX = x;
      }
    }
    preview.endShape();
    preview.endDraw();
  }
Exemplo n.º 2
0
  @Override
  public void keyPressed() {
    if (key == 'r') {
      loopEnd = (int) (mouseX * (long) samples.length / width);
    }
    if (key == 'a') {
      PVector best = new PVector(0, Float.MAX_VALUE);
      int sampleNr = (int) (mouseX * (long) samples.length / width);
      for (int i = sampleNr - 500000; i < sampleNr + 500000; i++) {
        PVector diff = diffs.get(i);
        if (diff != null) {
          if (diff.y < best.y) best = diff;
        }
      }

      if (best.x != 0) {
        loopEnd = (int) best.x;
      }
    }
    if (keyCode == RIGHT) {
      jingle.cue((int) (loopEnd * 1000l / jingle.getFormat().getSampleRate() - 1000));
    }
  }