$Id: volume_controller.cc,v 1.4 2000/05/03 15:54:21 pbd Exp $
*/
+#include <algorithm>
+
#include <string.h>
#include <limits.h>
#include "pbd/controllable.h"
+#include "pbd/stacktrace.h"
#include "gtkmm2ext/gui_thread.h"
+
+#include "ardour/dB.h"
+#include "ardour/rc_configuration.h"
#include "ardour/utils.h"
#include "volume_controller.h"
using namespace Gtk;
VolumeController::VolumeController (Glib::RefPtr<Gdk::Pixbuf> p,
- Gtk::Adjustment *adj,
+ boost::shared_ptr<PBD::Controllable> c,
+ double def,
+ double step,
+ double page,
bool with_numeric,
- int subw, int subh)
+ int subw,
+ int subh,
+ bool linear)
- : MotionFeedback (p, MotionFeedback::Rotary, "", adj, with_numeric, subw, subh)
-{
- get_adjustment()->signal_value_changed().connect (mem_fun (*this,&VolumeController::adjustment_value_changed));
+ : MotionFeedback (p, MotionFeedback::Rotary, c, def, step, page, "", with_numeric, subw, subh)
+ , _linear (linear)
+{
+ set_print_func (VolumeController::_dB_printer, this);
+ value->set_width_chars (8);
}
void
-VolumeController::set_controllable (boost::shared_ptr<PBD::Controllable> c)
+VolumeController::_dB_printer (char buf[32], const boost::shared_ptr<PBD::Controllable>& c, void* arg)
{
- MotionFeedback::set_controllable (c);
-
- controllable_connection.disconnect ();
-
- if (c) {
- c->Changed.connect (controllable_connection, MISSING_INVALIDATOR, boost::bind (&VolumeController::controllable_value_changed, this), gui_context());
- }
+ VolumeController* vc = reinterpret_cast<VolumeController*>(arg);
+ vc->dB_printer (buf, c);
}
void
-VolumeController::controllable_value_changed ()
+VolumeController::dB_printer (char buf[32], const boost::shared_ptr<PBD::Controllable>& c)
{
- boost::shared_ptr<PBD::Controllable> c = controllable();
- if (c) {
- get_adjustment()->set_value (gain_to_slider_position (c->get_value ()));
- }
+ if (c) {
+
+ if (_linear) {
+
+ double val = accurate_coefficient_to_dB (c->get_value());
+
+ if (step_inc < 1.0) {
+ if (val >= 0.0) {
+ snprintf (buf, 32, "+%5.2f dB", val);
+ } else {
+ snprintf (buf, 32, "%5.2f dB", val);
+ }
+ } else {
+ if (val >= 0.0) {
+ snprintf (buf, 32, "+%2ld dB", lrint (val));
+ } else {
+ snprintf (buf, 32, "%2ld dB", lrint (val));
+ }
+ }
+
+ } else {
+
+ double dB = accurate_coefficient_to_dB (c->get_value());
+
+ if (step_inc < 1.0) {
+ if (dB >= 0.0) {
+ snprintf (buf, 32, "+%5.2f dB", dB);
+ } else {
+ snprintf (buf, 32, "%5.2f dB", dB);
+ }
+ } else {
+ if (dB >= 0.0) {
+ snprintf (buf, 32, "+%2ld dB", lrint (dB));
+ } else {
+ snprintf (buf, 32, "%2ld dB", lrint (dB));
+ }
+ }
+ }
+ } else {
+ snprintf (buf, 32, "--");
+ }
}
-void
-VolumeController::adjustment_value_changed ()
+double
+VolumeController::to_control_value (double display_value)
+{
+ double v;
+
+ /* display value is always clamped to 0.0 .. 1.0 */
+ display_value = std::max (0.0, std::min (1.0, display_value));
+
+ if (_linear) {
+ v = _controllable->lower() + ((_controllable->upper() - _controllable->lower()) * display_value);
+ } else {
+ v = slider_position_to_gain_with_max (display_value, ARDOUR::Config->get_max_gain());
+ }
+
+ return v;
+}
+
+double
+VolumeController::to_display_value (double control_value)
{
- boost::shared_ptr<PBD::Controllable> c = controllable();
- if (c) {
- c->set_value (slider_position_to_gain (get_adjustment()->get_value()));
- }
+ double v;
+
+ if (_linear) {
+ v = (control_value - _controllable->lower ()) / (_controllable->upper() - _controllable->lower());
+ } else {
+ v = gain_to_slider_position_with_max (control_value, _controllable->upper());
+ }
+
+ return v;
}
+double
+VolumeController::adjust (double control_delta)
+{
+ double v;
+
+ if (!_linear) {
+
+ /* we map back into the linear/fractional slider position,
+ * because this kind of control goes all the way down
+ * to -inf dB, and we want this occur in a reasonable way in
+ * terms of user interaction. if we leave the adjustment in the
+ * gain coefficient domain (or dB domain), the lower end of the
+ * control range (getting close to -inf dB) takes forever.
+ */
+
+ /* convert to linear/fractional slider position domain */
+ v = gain_to_slider_position_with_max (_controllable->get_value (), _controllable->upper());
+ /* increment in this domain */
+ v += control_delta;
+ /* clamp to appropriate range for linear/fractional slider domain */
+ v = std::max (0.0, std::min (1.0, v));
+ /* convert back to gain coefficient domain */
+ v = slider_position_to_gain_with_max (v, _controllable->upper());
+ /* clamp in controller domain */
+ v = std::max (_controllable->lower(), std::min (_controllable->upper(), v));
+ /* convert to dB domain */
+ v = accurate_coefficient_to_dB (v);
+ /* round up/down to nearest 0.1dB */
+ if (control_delta > 0.0) {
+ v = ceil (v * 10.0) / 10.0;
+ } else {
+ v = floor (v * 10.0) / 10.0;
+ }
+ /* and return it */
+ return dB_to_coefficient (v);
+ } else {
+ double mult;
+
+ if (control_delta < 0.0) {
+ mult = -1.0;
+ } else {
+ mult = 1.0;
+ }
+
+ if (fabs (control_delta) < 0.05) {
+ control_delta = mult * 0.05;
+ } else {
+ control_delta = mult * 0.1;
+ }
+
+ v = _controllable->get_value();
+
+ if (v == 0.0) {
+ /* if we don't special case this, we can't escape from
+ the -infinity dB black hole.
+ */
+ if (control_delta > 0.0) {
+ v = dB_to_coefficient (-100 + control_delta);
+ }
+ } else {
+ static const double dB_minus_200 = dB_to_coefficient (-200.0);
+ static const double dB_minus_100 = dB_to_coefficient (-100.0);
+ static const double dB_minus_50 = dB_to_coefficient (-50.0);
+ static const double dB_minus_20 = dB_to_coefficient (-20.0);
+
+ if (control_delta < 0 && v < dB_minus_200) {
+ v = 0.0;
+ } else {
+
+ /* non-linear scaling as the dB level gets low
+ so that we can hit -inf and get back out of
+ it appropriately.
+ */
+
+ if (v < dB_minus_100) {
+ control_delta *= 1000.0;
+ } else if (v < dB_minus_50) {
+ control_delta *= 100.0;
+ } else if (v < dB_minus_20) {
+ control_delta *= 10.0;
+ }
+
+ v = accurate_coefficient_to_dB (v);
+ v += control_delta;
+ v = dB_to_coefficient (v);
+ }
+ }
+
+ return std::max (_controllable->lower(), std::min (_controllable->upper(), v));
+ }
+}
projects / ardour.git / blobdiff