Class: WavSpectrumAnalyzer::FrameBuffer

Inherits:
Object
  • Object
show all
Defined in:
ext/wavspa/fb/rb_fb.c

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Object 



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# File 'ext/wavspa/fb/rb_fb.c', line 372

static VALUE
rb_fb_initialize(int argc, VALUE* argv, VALUE self)
{
  rb_fb_t* ptr;
  VALUE width;
  VALUE height;
  VALUE opt;
  VALUE opts[N(opts_ids)];

  /*
   * extract context data
   */
  TypedData_Get_Struct(self, rb_fb_t, &fb_data_type, ptr);

  /*
   * parse argument
   */
  rb_scan_args(argc, argv, "21", &width, &height, &opt);

  /*
   * eval argument
   */
  Check_Type(width, T_FIXNUM);
  Check_Type(height, T_FIXNUM);

  if (FIX2INT(width) < 1 || FIX2INT(height) < 1){
    ARGUMENT_ERROR("too small");
  }

  if (opt != Qnil) {
    Check_Type(opt, T_HASH);
    rb_get_kwargs(opt, opts_ids, 0, N(opts_ids), opts);

    // :column_step
    if (opts[0] != Qundef) ptr->step = FIX2INT(opts[0]);

    // :margin_x
    if (opts[1] != Qundef) ptr->margin_x = FIX2INT(opts[1]);

    // :margin_y
    if (opts[2] != Qundef) ptr->margin_y = FIX2INT(opts[2]);

    // :ceil
    if (opts[3] != Qundef) ptr->ceil = NUM2DBL(opts[3]);

    // :floor
    if (opts[4] != Qundef) ptr->floor = NUM2DBL(opts[4]);

    // :numinance
    if (opts[5] != Qundef) ptr->lumi = NUM2DBL(opts[5]);
  }

  ptr->width  = FIX2INT(width);
  ptr->height = FIX2INT(height);

  ptr->stride = (ptr->margin_x + (ptr->width * ptr->step)) * 3;
  ptr->size   = ptr->stride * (ptr->height + ptr->margin_y);
  ptr->buf    = rb_str_buf_new(ptr->size);

  ptr->range  = ptr->ceil - ptr->floor;

  /*
   * clear buffer
   */
  rb_str_set_len(ptr->buf, ptr->size);
  memset(RSTRING_PTR(ptr->buf), 0, RSTRING_LEN(ptr->buf));

  return self;
}

Instance Method Details

#draw_amplitude(col, dat) ⇒ Object 



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# File 'ext/wavspa/fb/rb_fb.c', line 545

static VALUE
rb_fb_draw_amplitude(VALUE self, VALUE col, VALUE dat)
{
  rb_fb_t* ptr;
  uint8_t* p;
  uint8_t* src;
  double x;
  int v;
  int i;
  int j;

  /*
   * extract context data
   */
  TypedData_Get_Struct(self, rb_fb_t, &fb_data_type, ptr);

  /*
   * check argument
   */
  Check_Type(col, T_FIXNUM);
  Check_Type(dat, T_STRING);

  if (FIX2INT(col) < 0 || FIX2INT(col) >= ptr->width) {
    ARGUMENT_ERROR("invalid column number");
  }

  if (RSTRING_LEN(dat) != (int)((sizeof(double) * ptr->height))) {
    ARGUMENT_ERROR("invalid data length");
  }

  /*
   * put pixel data
   */
  p   = (uint8_t*)RSTRING_PTR(ptr->buf) +
              ((ptr->margin_x + (FIX2INT(col) * ptr->step)) * 3);
  src = (uint8_t*)RSTRING_PTR(dat) + (sizeof(double) * (ptr->height - 1));

  for (i = 0; i < ptr->height; i++) {
    memcpy(&x, src, sizeof(double));

    if (x >= ptr->ceil) {
      v = 255;

    } else if (x <= ptr->floor) {
      v = 0;

    } else {
      v = (uint8_t)((255.0 * (x - ptr->floor)) / ptr->range);
    }

    for (j = 0; j < ptr->step; j++) {
      p[0] = v / 3;
      p[1] = v;
      p[2] = v / 2;

      p += 3;
    }

    p   += (ptr->stride - (j * 3));
    src -= sizeof(double);
  }

  return self;
}

#draw_power(col, dat) ⇒ Object 



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# File 'ext/wavspa/fb/rb_fb.c', line 481

static VALUE
rb_fb_draw_power(VALUE self, VALUE col, VALUE dat)
{
  rb_fb_t* ptr;
  uint8_t* p;
  uint8_t* src;
  double x;
  int v;
  int i;
  int j;

  /*
   * extract context data
   */
  TypedData_Get_Struct(self, rb_fb_t, &fb_data_type, ptr);

  /*
   * check argument
   */
  Check_Type(col, T_FIXNUM);
  Check_Type(dat, T_STRING);

  if (FIX2INT(col) < 0 || FIX2INT(col) >= ptr->width) {
    ARGUMENT_ERROR("invalid column number");
  }

  if (RSTRING_LEN(dat) != (int)((sizeof(double) * ptr->height))) {
    ARGUMENT_ERROR("invalid data length");
  }

  /*
   * put pixel data
   */
  p   = (uint8_t*)RSTRING_PTR(ptr->buf) +
              ((ptr->margin_x + (FIX2INT(col) * ptr->step)) * 3);
  src = (uint8_t*)RSTRING_PTR(dat) + (sizeof(double) * (ptr->height - 1));

  for (i = 0; i < ptr->height; i++) {
    memcpy(&x, src, sizeof(double));

    v = round(x * 1024 * ptr->lumi);

    if (v < 0) {
      v = 0;

    } else if (v > 255.0) {
      v = 255;
    }

    for (j = 0; j < ptr->step; j++) {
      p[0] = v / 3;
      p[1] = v;
      p[2] = v / 2;

      p += 3;
    }

    p   += (ptr->stride - (j * 3));
    src -= sizeof(double);
  }

  return self;
}

#height ⇒ Object 



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# File 'ext/wavspa/fb/rb_fb.c', line 455

static VALUE
rb_fb_height(VALUE self)
{
  rb_fb_t* ptr;

  /*
   * extract context data
   */
  TypedData_Get_Struct(self, rb_fb_t, &fb_data_type, ptr);

  return INT2FIX(ptr->height + ptr->margin_y);
}

#hline(row, label) ⇒ Object 



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# File 'ext/wavspa/fb/rb_fb.c', line 663

static VALUE
rb_fb_hline(VALUE self, VALUE row, VALUE label)
{
  rb_fb_t* ptr;
  uint8_t* p;
  int i;
  int j;
  int w;

  /*
   * extract context data
   */
  TypedData_Get_Struct(self, rb_fb_t, &fb_data_type, ptr);

  /*
   * check argument
   */
  Check_Type(row, T_FIXNUM);
  Check_Type(label, T_STRING);

  if (FIX2INT(row) < 0 || FIX2INT(row) >= ptr->height) {
    ARGUMENT_ERROR("invalid column number");
  }

  /*
   * put line
   */
  p = (uint8_t*)RSTRING_PTR(ptr->buf) + (FIX2INT(row) * ptr->stride);
  w = ptr->margin_x + (ptr->width * ptr->step);

  for (i = 0; i < w; i++) {
    for (j = 0; j < ptr->step; j++) {
      int v;
      v = p[0] + 0xff;
      p[0] = (v <= 0xff)? v: 0xff;

      v = p[1] + 0x00;
      p[1] = (v <= 0xff)? v: 0xff;

      v = p[2] + 0x00;
      p[2] = (v <= 0xff)? v: 0xff;
    }

    p += 3;
  }

  /*
   * put label
   */
  put_string(ptr, FIX2INT(row) - 11, 4, label, 0xff, 0x00, 0x00);

  return self;
}

#to_s ⇒ Object 



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# File 'ext/wavspa/fb/rb_fb.c', line 468

static VALUE
rb_fb_to_s(VALUE self)
{
  rb_fb_t* ptr;

  /*
   * extract context data
   */
  TypedData_Get_Struct(self, rb_fb_t, &fb_data_type, ptr);

  return ptr->buf;
}

#vline(col, label) ⇒ Object 



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# File 'ext/wavspa/fb/rb_fb.c', line 717

static VALUE
rb_fb_vline(VALUE self, VALUE col, VALUE label)
{
  rb_fb_t* ptr;
  uint8_t* p;
  int i;
  int h;

  /*
   * extract context data
   */
  TypedData_Get_Struct(self, rb_fb_t, &fb_data_type, ptr);

  /*
   * check argument
   */
  Check_Type(col, T_FIXNUM);
  Check_Type(label, T_STRING);

  if (FIX2INT(col) < 0 || FIX2INT(col) >= ptr->width) {
    ARGUMENT_ERROR("invalid column number");
  }

  /*
   * put line
   */
  p = (uint8_t*)RSTRING_PTR(ptr->buf) +
          ((ptr->margin_x + (FIX2INT(col) * ptr->step)) * 3);
  h = ptr->margin_y + ptr->height;

  for (i = 0; i < h; i++) {
    int v;
    v = p[0] + 0x40;
    p[0] = (v <= 0xff)? v: 0xff;

    v = p[1] + 0x40;
    p[1] = (v <= 0xff)? v: 0xff;

    v = p[2] + 0xff;
    p[2] = (v <= 0xff)? v: 0xff;

    p += ptr->stride;
  }

  /*
   * put label
   */
  put_string(ptr,
             ptr->height + 14,
             ptr->margin_x + (FIX2INT(col) * ptr->step) + 4,
             label,
             0x80,
             0x80,
             0xff);

  return self;
}

#width ⇒ Object 



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# File 'ext/wavspa/fb/rb_fb.c', line 442

static VALUE
rb_fb_width(VALUE self)
{
  rb_fb_t* ptr;

  /*
   * extract context data
   */
  TypedData_Get_Struct(self, rb_fb_t, &fb_data_type, ptr);

  return INT2FIX(ptr->margin_x + (ptr->width * ptr->step));
}