AU: install latency listener
[ardour.git] / gtk2_ardour / level_meter.cc
index 34d34608c60e868a58ba7efbe38bbd8f0b233b13..2ab2cf567c2d65dd085db7f6832708705a122c44 100644 (file)
 #include "ardour/meter.h"
 
 #include <gtkmm2ext/utils.h>
-#include <gtkmm2ext/fastmeter.h>
-#include <gtkmm2ext/barcontroller.h>
-#include "midi++/manager.h"
 #include "pbd/fastlog.h"
 
-#include "ardour_ui.h"
-#include "global_signals.h"
 #include "level_meter.h"
 #include "utils.h"
 #include "logmeter.h"
 #include "gui_thread.h"
 #include "keyboard.h"
 #include "public_editor.h"
+#include "ui_config.h"
 
-#include "i18n.h"
+#include "pbd/i18n.h"
 
 using namespace ARDOUR;
+using namespace ARDOUR_UI_UTILS;
 using namespace PBD;
 using namespace Gtkmm2ext;
 using namespace Gtk;
 using namespace std;
 
-//sigc::signal<void> LevelMeter::ResetAllPeakDisplays;
-//sigc::signal<void,RouteGroup*> LevelMeter::ResetGroupPeakDisplays;
-
-
-LevelMeter::LevelMeter (Session* s)
-       : _meter (0)
+LevelMeterBase::LevelMeterBase (Session* s, PBD::EventLoop::InvalidationRecord* ir, FastMeter::Orientation o)
+       : parent_invalidator(ir)
+       , _meter (0)
+       , _meter_orientation(o)
+       , regular_meter_width (6)
        , meter_length (0)
        , thin_meter_width(2)
+       , max_peak (minus_infinity())
+       , meter_type (MeterPeak)
+       , visible_meter_type (MeterType(0))
+       , meter_count (0)
+       , max_visible_meters (0)
+       , color_changed (false)
 {
        set_session (s);
-       set_spacing (1);
-       Config->ParameterChanged.connect (_parameter_connection, invalidator (*this), boost::bind (&LevelMeter::parameter_changed, this, _1), gui_context());
-       UI::instance()->theme_changed.connect (sigc::mem_fun(*this, &LevelMeter::on_theme_changed));
-       ColorsChanged.connect (sigc::mem_fun (*this, &LevelMeter::color_handler));
-       max_peak = minus_infinity();
-}
 
-void
-LevelMeter::on_theme_changed()
-{
-       style_changed = true;
+       Config->ParameterChanged.connect (_parameter_connection, parent_invalidator, boost::bind (&LevelMeterBase::parameter_changed, this, _1), gui_context());
+       UIConfiguration::instance().ParameterChanged.connect (sigc::mem_fun(*this, &LevelMeterBase::parameter_changed));
+       UIConfiguration::instance().ColorsChanged.connect (sigc::mem_fun (*this, &LevelMeterBase::color_handler));
 }
 
-LevelMeter::~LevelMeter ()
+LevelMeterBase::~LevelMeterBase ()
 {
+       _configuration_connection.disconnect();
+       _meter_type_connection.disconnect();
+       _parameter_connection.disconnect();
        for (vector<MeterInfo>::iterator i = meters.begin(); i != meters.end(); i++) {
                delete (*i).meter;
        }
+       meters.clear();
 }
 
 void
-LevelMeter::set_meter (PeakMeter* meter)
+LevelMeterBase::set_meter (PeakMeter* meter)
 {
        _configuration_connection.disconnect();
+       _meter_type_connection.disconnect();
+
        _meter = meter;
+       color_changed = true; // force update
 
        if (_meter) {
-               _meter->ConfigurationChanged.connect (_configuration_connection, invalidator (*this), boost::bind (&LevelMeter::configuration_changed, this, _1, _2), gui_context());
+               _meter->ConfigurationChanged.connect (_configuration_connection, parent_invalidator, boost::bind (&LevelMeterBase::configuration_changed, this, _1, _2), gui_context());
+               _meter->TypeChanged.connect (_meter_type_connection, parent_invalidator, boost::bind (&LevelMeterBase::meter_type_changed, this, _1), gui_context());
+       }
+}
+
+static float meter_lineup_cfg(MeterLineUp lul, float offset) {
+       switch (lul) {
+               case MeteringLineUp24:
+                       return offset + 6.0;
+               case MeteringLineUp20:
+                       return offset + 2.0;
+               case MeteringLineUp18:
+                       return offset;
+               case MeteringLineUp15:
+                       return offset - 3.0;
+               default:
+                       break;
+       }
+       return offset;
+}
+
+static float meter_lineup(float offset) {
+       return meter_lineup_cfg (UIConfiguration::instance().get_meter_line_up_level(), offset);
+}
+
+static float vu_standard() {
+       // note - default meter config is +2dB (france)
+       switch (UIConfiguration::instance().get_meter_vu_standard()) {
+               default:
+               case MeteringVUfrench:   // 0VU = -2dBu
+                       return 0;
+               case MeteringVUamerican: // 0VU =  0dBu
+                       return -2;
+               case MeteringVUstandard: // 0VU = +4dBu
+                       return -6;
+               case MeteringVUeight:    // 0VU = +8dBu
+                       return -10;
        }
 }
 
 float
-LevelMeter::update_meters ()
+LevelMeterBase::update_meters ()
 {
        vector<MeterInfo>::iterator i;
        uint32_t n;
-       float peak, mpeak;
 
        if (!_meter) {
                return 0.0f;
@@ -100,20 +137,40 @@ LevelMeter::update_meters ()
 
        for (n = 0, i = meters.begin(); i != meters.end(); ++i, ++n) {
                if ((*i).packed) {
-                       mpeak = _meter->max_peak_power(n);
+                       const float mpeak = _meter->meter_level(n, MeterMaxPeak);
                        if (mpeak > (*i).max_peak) {
                                (*i).max_peak = mpeak;
-                               (*i).meter->set_highlight(mpeak > Config->get_meter_peak());
+                               (*i).meter->set_highlight(mpeak >= UIConfiguration::instance().get_meter_peak());
                        }
                        if (mpeak > max_peak) {
                                max_peak = mpeak;
                        }
 
-                       peak = _meter->peak_power (n);
                        if (n < nmidi) {
-                               (*i).meter->set (peak);
+                               (*i).meter->set (_meter->meter_level (n, MeterPeak));
                        } else {
-                               (*i).meter->set (log_meter (peak));
+                               const float peak = _meter->meter_level (n, meter_type);
+                               if (meter_type == MeterPeak) {
+                                       (*i).meter->set (log_meter (peak));
+                               } else if (meter_type == MeterPeak0dB) {
+                                       (*i).meter->set (log_meter0dB (peak));
+                               } else if (meter_type == MeterIEC1NOR) {
+                                       (*i).meter->set (meter_deflect_nordic (peak + meter_lineup(0)));
+                               } else if (meter_type == MeterIEC1DIN) {
+                                       (*i).meter->set (meter_deflect_din (peak + meter_lineup_cfg(UIConfiguration::instance().get_meter_line_up_din(), 3.0)));
+                               } else if (meter_type == MeterIEC2BBC || meter_type == MeterIEC2EBU) {
+                                       (*i).meter->set (meter_deflect_ppm (peak + meter_lineup(0)));
+                               } else if (meter_type == MeterVU) {
+                                       (*i).meter->set (meter_deflect_vu (peak + vu_standard() + meter_lineup(0)));
+                               } else if (meter_type == MeterK12) {
+                                       (*i).meter->set (meter_deflect_k (peak, 12), meter_deflect_k(_meter->meter_level(n, MeterPeak), 12));
+                               } else if (meter_type == MeterK14) {
+                                       (*i).meter->set (meter_deflect_k (peak, 14), meter_deflect_k(_meter->meter_level(n, MeterPeak), 14));
+                               } else if (meter_type == MeterK20) {
+                                       (*i).meter->set (meter_deflect_k (peak, 20), meter_deflect_k(_meter->meter_level(n, MeterPeak), 20));
+                               } else { // RMS
+                                       (*i).meter->set (log_meter (peak), log_meter(_meter->meter_level(n, MeterPeak)));
+                               }
                        }
                }
        }
@@ -121,22 +178,26 @@ LevelMeter::update_meters ()
 }
 
 void
-LevelMeter::parameter_changed (string p)
+LevelMeterBase::parameter_changed (string p)
 {
-       ENSURE_GUI_THREAD (*this, &LevelMeter::parameter_changed, p)
+       ENSURE_GUI_THREAD (*this, &LevelMeterBase::parameter_changed, p)
 
        if (p == "meter-hold") {
                vector<MeterInfo>::iterator i;
                uint32_t n;
 
                for (n = 0, i = meters.begin(); i != meters.end(); ++i, ++n) {
-                       (*i).meter->set_hold_count ((uint32_t) floor(Config->get_meter_hold()));
+                       (*i).meter->set_hold_count ((uint32_t) floor(UIConfiguration::instance().get_meter_hold()));
                }
        }
        else if (p == "meter-line-up-level") {
                color_changed = true;
                setup_meters (meter_length, regular_meter_width, thin_meter_width);
        }
+       else if (p == "meter-style-led") {
+               color_changed = true;
+               setup_meters (meter_length, regular_meter_width, thin_meter_width);
+       }
        else if (p == "meter-peak") {
                vector<MeterInfo>::iterator i;
                uint32_t n;
@@ -148,29 +209,48 @@ LevelMeter::parameter_changed (string p)
 }
 
 void
-LevelMeter::configuration_changed (ChanCount /*in*/, ChanCount /*out*/)
+LevelMeterBase::configuration_changed (ChanCount /*in*/, ChanCount /*out*/)
 {
-       color_changed = true;
        setup_meters (meter_length, regular_meter_width, thin_meter_width);
 }
 
 void
-LevelMeter::hide_all_meters ()
+LevelMeterBase::meter_type_changed (MeterType t)
+{
+       meter_type = t;
+       setup_meters (meter_length, regular_meter_width, thin_meter_width);
+       MeterTypeChanged(t);
+}
+
+void
+LevelMeterBase::hide_all_meters ()
 {
        for (vector<MeterInfo>::iterator i = meters.begin(); i != meters.end(); ++i) {
                if ((*i).packed) {
-                       remove (*((*i).meter));
+                       mtr_remove (*((*i).meter));
                        (*i).packed = false;
                }
        }
+       meter_count = 0;
 }
 
 void
-LevelMeter::setup_meters (int len, int initial_width, int thin_width)
+LevelMeterBase::set_max_audio_meter_count (uint32_t cnt)
+{
+       if (cnt == max_visible_meters) {
+               return;
+       }
+       color_changed = true; // force re-setup
+       max_visible_meters = cnt;
+       setup_meters (meter_length, regular_meter_width, thin_meter_width);
+}
+
+void
+LevelMeterBase::setup_meters (int len, int initial_width, int thin_width)
 {
-       hide_all_meters ();
 
        if (!_meter) {
+               hide_all_meters ();
                return; /* do it later or never */
        }
 
@@ -183,6 +263,7 @@ LevelMeter::setup_meters (int len, int initial_width, int thin_width)
        guint16 width;
 
        if (nmeters == 0) {
+               hide_all_meters ();
                return;
        }
 
@@ -192,129 +273,300 @@ LevelMeter::setup_meters (int len, int initial_width, int thin_width)
                width = thin_meter_width;
        }
 
+       width = rint (width * UIConfiguration::instance().get_ui_scale());
+
+       if (   meters.size() > 0
+           && nmeters == meter_count
+           && meters[0].width == width
+           && meters[0].length == len
+           && !color_changed
+           && meter_type == visible_meter_type) {
+               return;
+       }
+
+#if 0
+       printf("Meter redraw: %s %s %s %s %s %s\n",
+                       (meters.size() > 0) ? "yes" : "no",
+                       (meters.size() > 0 &&  meters[0].width == width) ? "yes" : "no",
+                       (meters.size() > 0 &&  meters[0].length == len) ? "yes" : "no",
+                       (nmeters == meter_count) ? "yes" : "no",
+                       (meter_type == visible_meter_type) ? "yes" : "no",
+                       !color_changed ? "yes" : "no"
+                       );
+#endif
+
+       hide_all_meters ();
        while (meters.size() < nmeters) {
                meters.push_back (MeterInfo());
        }
 
-       //cerr << "LevelMeter::setup_meters() called color_changed = " << color_changed << " colors: " << endl;//DEBUG
+       //cerr << "LevelMeterBase::setup_meters() called color_changed = " << color_changed << " colors: " << endl;//DEBUG
 
        for (int32_t n = nmeters-1; nmeters && n >= 0 ; --n) {
                uint32_t c[10];
+               uint32_t b[4];
                float stp[4];
+               int styleflags = UIConfiguration::instance().get_meter_style_led() ? 3 : 1;
+               b[0] = UIConfiguration::instance().color ("meter background bottom");
+               b[1] = UIConfiguration::instance().color ("meter background top");
+               b[2] = 0x991122ff; // red highlight gradient Bot
+               b[3] = 0x551111ff; // red highlight gradient Top
                if (n < nmidi) {
-                       c[0] = ARDOUR_UI::config()->canvasvar_MidiMeterColor0.get();
-                       c[1] = ARDOUR_UI::config()->canvasvar_MidiMeterColor1.get();
-                       c[2] = ARDOUR_UI::config()->canvasvar_MidiMeterColor2.get();
-                       c[3] = ARDOUR_UI::config()->canvasvar_MidiMeterColor3.get();
-                       c[4] = ARDOUR_UI::config()->canvasvar_MidiMeterColor4.get();
-                       c[5] = ARDOUR_UI::config()->canvasvar_MidiMeterColor5.get();
-                       c[6] = ARDOUR_UI::config()->canvasvar_MidiMeterColor6.get();
-                       c[7] = ARDOUR_UI::config()->canvasvar_MidiMeterColor7.get();
-                       c[8] = ARDOUR_UI::config()->canvasvar_MidiMeterColor8.get();
-                       c[9] = ARDOUR_UI::config()->canvasvar_MidiMeterColor9.get();
+                       c[0] = UIConfiguration::instance().color ("midi meter color0");
+                       c[1] = UIConfiguration::instance().color ("midi meter color1");
+                       c[2] = UIConfiguration::instance().color ("midi meter color2");
+                       c[3] = UIConfiguration::instance().color ("midi meter color3");
+                       c[4] = UIConfiguration::instance().color ("midi meter color4");
+                       c[5] = UIConfiguration::instance().color ("midi meter color5");
+                       c[6] = UIConfiguration::instance().color ("midi meter color6");
+                       c[7] = UIConfiguration::instance().color ("midi meter color7");
+                       c[8] = UIConfiguration::instance().color ("midi meter color8");
+                       c[9] = UIConfiguration::instance().color ("midi meter color9");
                        stp[0] = 115.0 *  32.0 / 128.0;
                        stp[1] = 115.0 *  64.0 / 128.0;
                        stp[2] = 115.0 * 100.0 / 128.0;
                        stp[3] = 115.0 * 112.0 / 128.0;
                } else {
-                       switch (Config->get_meter_line_up_level()) {
-                               case MeteringLineUp24:
-                                       stp[0] = 42.0;
-                                       stp[1] = 77.5;
-                                       stp[2] = 92.5;
-                                       stp[3] = 100.0;
+                       c[0] = UIConfiguration::instance().color ("meter color0");
+                       c[1] = UIConfiguration::instance().color ("meter color1");
+                       c[2] = UIConfiguration::instance().color ("meter color2");
+                       c[3] = UIConfiguration::instance().color ("meter color3");
+                       c[4] = UIConfiguration::instance().color ("meter color4");
+                       c[5] = UIConfiguration::instance().color ("meter color5");
+                       c[6] = UIConfiguration::instance().color ("meter color6");
+                       c[7] = UIConfiguration::instance().color ("meter color7");
+                       c[8] = UIConfiguration::instance().color ("meter color8");
+                       c[9] = UIConfiguration::instance().color ("meter color9");
+
+                       switch (meter_type) {
+                               case MeterK20:
+                                       stp[0] = 115.0 * meter_deflect_k(-40, 20);  //-20
+                                       stp[1] = 115.0 * meter_deflect_k(-20, 20);  //  0
+                                       stp[2] = 115.0 * meter_deflect_k(-18, 20);  // +2
+                                       stp[3] = 115.0 * meter_deflect_k(-16, 20);  // +4
+                                       c[0] = c[1] = 0x008800ff;
+                                       c[2] = c[3] = 0x00ff00ff;
+                                       c[4] = c[5] = 0xffff00ff;
+                                       c[6] = c[7] = 0xffff00ff;
+                                       c[8] = c[9] = 0xff0000ff;
+                                       break;
+                               case MeterK14:
+                                       stp[0] = 115.0 * meter_deflect_k(-34, 14);  //-20
+                                       stp[1] = 115.0 * meter_deflect_k(-14, 14);  //  0
+                                       stp[2] = 115.0 * meter_deflect_k(-12, 14);  // +2
+                                       stp[3] = 115.0 * meter_deflect_k(-10, 14);  // +4
+                                       c[0] = c[1] = 0x008800ff;
+                                       c[2] = c[3] = 0x00ff00ff;
+                                       c[4] = c[5] = 0xffff00ff;
+                                       c[6] = c[7] = 0xffff00ff;
+                                       c[8] = c[9] = 0xff0000ff;
+                                       break;
+                               case MeterK12:
+                                       stp[0] = 115.0 * meter_deflect_k(-32, 12);  //-20
+                                       stp[1] = 115.0 * meter_deflect_k(-12, 12);  //  0
+                                       stp[2] = 115.0 * meter_deflect_k(-10, 12);  // +2
+                                       stp[3] = 115.0 * meter_deflect_k( -8, 12);  // +4
+                                       c[0] = c[1] = 0x008800ff;
+                                       c[2] = c[3] = 0x00ff00ff;
+                                       c[4] = c[5] = 0xffff00ff;
+                                       c[6] = c[7] = 0xffff00ff;
+                                       c[8] = c[9] = 0xff0000ff;
+                                       break;
+                               case MeterIEC2BBC:
+                                       c[0] = c[1] = c[2] = c[3] = c[4] = c[5] = c[6] = c[7] = c[8] = c[9] =
+                                               UIConfiguration::instance().color ("meter color BBC");
+                                       stp[0] = stp[1] = stp[2] = stp[3] = 115.0;
                                        break;
-                               case MeteringLineUp20:
-                                       stp[0] = 50.0;
-                                       stp[1] = 77.5;
-                                       stp[2] = 92.5;
-                                       stp[3] = 100.0;
+                               case MeterIEC2EBU:
+                                       stp[0] = 115.0 * meter_deflect_ppm(-24); // ignored
+                                       stp[1] = 115.0 * meter_deflect_ppm(-18);
+                                       stp[2] = 115.0 * meter_deflect_ppm( -9);
+                                       stp[3] = 115.0 * meter_deflect_ppm(  0); // ignored
+                                       c[3] = c[2] = c[1];
+                                       c[6] = c[7] = c[8] = c[9];
                                        break;
-                               default:
-                               case MeteringLineUp18:
-                                       stp[0] = 55.0;
-                                       stp[1] = 77.5;
-                                       stp[2] = 92.5;
-                                       stp[3] = 100.0;
+                               case MeterIEC1NOR:
+                                       stp[0] = 115.0 * meter_deflect_nordic(-30); // ignored
+                                       stp[1] = 115.0 * meter_deflect_nordic(-18);
+                                       stp[2] = 115.0 * meter_deflect_nordic(-12);
+                                       stp[3] = 115.0 * meter_deflect_nordic( -9); // ignored
+                                       c[0] = c[1] = c[2]; // bright-green
+                                       c[6] = c[7] = c[8] = c[9];
                                        break;
-                               case MeteringLineUp15:
-                                       stp[0] = 62.5;
-                                       stp[1] = 77.5;
-                                       stp[2] = 92.5;
-                                       stp[3] = 100.0;
+                               case MeterIEC1DIN:
+                                       stp[0] = 115.0 * meter_deflect_din(-29); // ignored
+                                       stp[1] = 115.0 * meter_deflect_din(-18);
+                                       stp[2] = 115.0 * meter_deflect_din(-15); // ignored
+                                       stp[3] = 115.0 * meter_deflect_din( -9);
+                                       c[0] = c[2] = c[3] = c[1];
+                                       c[4] = c[6];
+                                       c[5] = c[7];
                                        break;
+                               case MeterVU:
+                                       stp[0] = 115.0 * meter_deflect_vu(-26); // -6
+                                       stp[1] = 115.0 * meter_deflect_vu(-23); // -3
+                                       stp[2] = 115.0 * meter_deflect_vu(-20); // 0
+                                       stp[3] = 115.0 * meter_deflect_vu(-18); // +2
+                                       c[0] = c[2] = c[3] = c[4] = c[5] = c[1];
+                                       c[7] = c[8] = c[9] = c[6];
+                                       break;
+                               case MeterPeak0dB:
+                                        stp[1] =  89.125; // 115.0 * log_meter0dB(-9);
+                                        stp[2] = 106.375; // 115.0 * log_meter0dB(-3);
+                                        stp[3] = 115.0;   // 115.0 * log_meter0dB(0);
+                                       switch (UIConfiguration::instance().get_meter_line_up_level()) {
+                                       case MeteringLineUp24:
+                                               stp[0] = 115.0 * log_meter0dB(-24);
+                                               break;
+                                       case MeteringLineUp20:
+                                               stp[0] = 115.0 * log_meter0dB(-20);
+                                               break;
+                                       default:
+                                       case MeteringLineUp18:
+                                               stp[0] = 115.0 * log_meter0dB(-18);
+                                               break;
+                                       case MeteringLineUp15:
+                                               stp[0] = 115.0 * log_meter0dB(-15);
+                                       }
+                                       break;
+                               default: // PEAK, RMS
+                                       stp[1] = 77.5;  // 115 * log_meter(-9)
+                                       stp[2] = 92.5;  // 115 * log_meter(-3)
+                                       stp[3] = 100.0; // 115 * log_meter(0)
+                                       switch (UIConfiguration::instance().get_meter_line_up_level()) {
+                                       case MeteringLineUp24:
+                                               stp[0] = 42.0;
+                                               break;
+                                       case MeteringLineUp20:
+                                               stp[0] = 50.0;
+                                               break;
+                                       default:
+                                       case MeteringLineUp18:
+                                               stp[0] = 55.0;
+                                               break;
+                                       case MeteringLineUp15:
+                                               stp[0] = 62.5;
+                                               break;
+                               }
                        }
-                       c[0] = ARDOUR_UI::config()->canvasvar_MeterColor0.get();
-                       c[1] = ARDOUR_UI::config()->canvasvar_MeterColor1.get();
-                       c[2] = ARDOUR_UI::config()->canvasvar_MeterColor2.get();
-                       c[3] = ARDOUR_UI::config()->canvasvar_MeterColor3.get();
-                       c[4] = ARDOUR_UI::config()->canvasvar_MeterColor4.get();
-                       c[5] = ARDOUR_UI::config()->canvasvar_MeterColor5.get();
-                       c[6] = ARDOUR_UI::config()->canvasvar_MeterColor6.get();
-                       c[7] = ARDOUR_UI::config()->canvasvar_MeterColor7.get();
-                       c[8] = ARDOUR_UI::config()->canvasvar_MeterColor8.get();
-                       c[9] = ARDOUR_UI::config()->canvasvar_MeterColor9.get();
                }
-               if (meters[n].width != width || meters[n].length != len || color_changed) {
+               if (meters[n].width != width || meters[n].length != len || color_changed || meter_type != visible_meter_type) {
+                       bool hl = meters[n].meter ? meters[n].meter->get_highlight() : false;
+                       meters[n].packed = false;
                        delete meters[n].meter;
-                       meters[n].meter = new FastMeter ((uint32_t) floor (Config->get_meter_hold()), width, FastMeter::Vertical, len,
+                       meters[n].meter = new FastMeter ((uint32_t) floor (UIConfiguration::instance().get_meter_hold()), width, _meter_orientation, len,
                                        c[0], c[1], c[2], c[3], c[4],
                                        c[5], c[6], c[7], c[8], c[9],
-                                       ARDOUR_UI::config()->canvasvar_MeterBackgroundBot.get(),
-                                       ARDOUR_UI::config()->canvasvar_MeterBackgroundTop.get(),
-                                       0x991122ff, 0x551111ff,
-                                       stp[0], stp[1], stp[2], stp[3]
+                                       b[0], b[1], b[2], b[3],
+                                       stp[0], stp[1], stp[2], stp[3],
+                                       styleflags
                                        );
+                       meters[n].meter->set_highlight(hl);
                        meters[n].width = width;
                        meters[n].length = len;
                        meters[n].meter->add_events (Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK);
-                       meters[n].meter->signal_button_press_event().connect (sigc::mem_fun (*this, &LevelMeter::meter_button_press));
-                       meters[n].meter->signal_button_release_event().connect (sigc::mem_fun (*this, &LevelMeter::meter_button_release));
+                       meters[n].meter->signal_button_press_event().connect (sigc::mem_fun (*this, &LevelMeterBase::meter_button_press), false);
+                       meters[n].meter->signal_button_release_event().connect (sigc::mem_fun (*this, &LevelMeterBase::meter_button_release), false);
                }
 
-               pack_end (*meters[n].meter, false, false);
-               meters[n].meter->show_all ();
+               //pack_end (*meters[n].meter, false, false);
+               mtr_pack (*meters[n].meter);
                meters[n].packed = true;
+               if (max_visible_meters == 0 || (uint32_t) n < max_visible_meters + nmidi) {
+                       meters[n].meter->show_all ();
+               } else {
+                       meters[n].meter->hide ();
+               }
        }
-       show();
+       //show();
        color_changed = false;
+       visible_meter_type = meter_type;
+       meter_count = nmeters;
+}
+
+void
+LevelMeterBase::set_type(MeterType t)
+{
+       meter_type = t;
+       _meter->set_type(t);
 }
 
 bool
-LevelMeter::meter_button_press (GdkEventButton* ev)
+LevelMeterBase::meter_button_press (GdkEventButton* ev)
 {
-       return ButtonPress (ev); /* EMIT SIGNAL */
+       return static_cast<bool>(ButtonPress (ev)); /* EMIT SIGNAL */
 }
 
 bool
-LevelMeter::meter_button_release (GdkEventButton* ev)
+LevelMeterBase::meter_button_release (GdkEventButton* ev)
 {
        if (ev->button == 1) {
-               clear_meters ();
+               clear_meters (false);
        }
+       ButtonRelease(ev);
 
        return true;
 }
 
 
-void LevelMeter::clear_meters ()
+void LevelMeterBase::clear_meters (bool reset_highlight)
 {
        for (vector<MeterInfo>::iterator i = meters.begin(); i < meters.end(); i++) {
                (*i).meter->clear();
                (*i).max_peak = minus_infinity();
-               (*i).meter->set_highlight(false);
+               if (reset_highlight)
+                       (*i).meter->set_highlight(false);
        }
        max_peak = minus_infinity();
 }
 
-void LevelMeter::hide_meters ()
+void LevelMeterBase::hide_meters ()
 {
        hide_all_meters();
 }
 
 void
-LevelMeter::color_handler ()
+LevelMeterBase::color_handler ()
 {
        color_changed = true;
+       setup_meters (meter_length, regular_meter_width, thin_meter_width);
+}
+
+LevelMeterHBox::LevelMeterHBox(Session* s)
+       : LevelMeterBase(s, invalidator(*this))
+{
+       set_spacing(1);
+       show();
 }
 
+
+LevelMeterHBox::~LevelMeterHBox() {}
+
+void
+LevelMeterHBox::mtr_pack(Gtk::Widget &w) {
+       pack_end (w, false, false);
+}
+
+void
+LevelMeterHBox::mtr_remove(Gtk::Widget &w) {
+       remove (w);
+}
+
+
+LevelMeterVBox::LevelMeterVBox(Session* s)
+       : LevelMeterBase(s, invalidator(*this), FastMeter::Horizontal)
+{
+       set_spacing(1);
+       show();
+}
+LevelMeterVBox::~LevelMeterVBox() {}
+
+void
+LevelMeterVBox::mtr_pack(Gtk::Widget &w) {
+       pack_end (w, false, false);
+}
+
+void
+LevelMeterVBox::mtr_remove(Gtk::Widget &w) {
+       remove (w);
+}