Method: Video4Linux2::Camera#capture

Defined in:
ext/v4l2/v4l2.c

#capture ⇒ Object 



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# File 'ext/v4l2/v4l2.c', line 832

static VALUE
rb_camera_capture(VALUE self)
{
  VALUE ret;
  camera_t* ptr;
  size_t used;
  int err;

  /*
   * strip object
   */
  Data_Get_Struct(self, camera_t, ptr);

  /*
   * allocate return value.
   */
  ret = rb_str_buf_new(ptr->image_size);
  rb_str_set_len(ret, ptr->image_size);

  /*
   * do capture
   */
  err = camera_get_image(ptr, RSTRING_PTR(ret), &used);
  if (err) {
    rb_raise(rb_eRuntimeError, "capture failed.");
  }

  if (ptr->image_size != used) {
    rb_str_set_len(ret, used);
  }

  return ret;
}