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level_meter.cc

/*
  Copyright (C) 2002 Paul Davis

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <limits.h>

#include <ardour/io.h>
#include <ardour/route.h>
#include <ardour/route_group.h>
#include <ardour/session.h>
#include <ardour/session_route.h>
#include <ardour/dB.h>

#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/fastmeter.h>
#include <gtkmm2ext/stop_signal.h>
#include <gtkmm2ext/barcontroller.h>
#include <midi++/manager.h>
#include <pbd/fastlog.h>

#include "ardour_ui.h"
#include "level_meter.h"
#include "utils.h"
#include "logmeter.h"
#include "gui_thread.h"
#include "keyboard.h"
#include "public_editor.h"

#include <ardour/session.h>
#include <ardour/route.h>

#include "i18n.h"

using namespace ARDOUR;
using namespace PBD;
using namespace Gtkmm2ext;
using namespace Gtk;
using namespace sigc;
using namespace std;

//sigc::signal<void> LevelMeter::ResetAllPeakDisplays;
//sigc::signal<void,RouteGroup*> LevelMeter::ResetGroupPeakDisplays;


LevelMeter::LevelMeter (boost::shared_ptr<IO> io, Session& s)
      : _io (io),
        _session (s)
      
{
      set_spacing (1);
      Config->ParameterChanged.connect (mem_fun (*this, &LevelMeter::parameter_changed));
      UI::instance()->theme_changed.connect (mem_fun(*this, &LevelMeter::on_theme_changed));
      ColorsChanged.connect (mem_fun (*this, &LevelMeter::color_handler));
      max_peak = minus_infinity();
}

void
LevelMeter::on_theme_changed()
{
      style_changed = true;
}

LevelMeter::~LevelMeter ()
{
      for (vector<MeterInfo>::iterator i = meters.begin(); i != meters.end(); i++) {
            if ((*i).meter) {
                  delete (*i).meter;
            }
      }
}

float
LevelMeter::update_meters ()
{
      vector<MeterInfo>::iterator i;
      uint32_t n;
      float peak, mpeak;
      
      for (n = 0, i = meters.begin(); i != meters.end(); ++i, ++n) {
            if ((*i).packed) {
                  peak = _io->peak_input_power (n);
                  (*i).meter->set (log_meter (peak));
                  mpeak = _io->max_peak_power(n);
                  if (mpeak > max_peak) {
                        max_peak = mpeak;
                  }
            }
      }
      return max_peak;
}

void
LevelMeter::parameter_changed(const char* parameter_name)
{
#define PARAM_IS(x) (!strcmp (parameter_name, (x)))

      ENSURE_GUI_THREAD (bind (mem_fun(*this, &LevelMeter::parameter_changed), parameter_name));

      if (PARAM_IS ("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()));
            }
      }

#undef PARAM_IS
}

void
LevelMeter::hide_all_meters ()
{

      for (vector<MeterInfo>::iterator i = meters.begin(); i != meters.end(); ++i) {
            if ((*i).packed) {
                  remove (*((*i).meter));
                  (*i).packed = false;
            }
      }
}

void
LevelMeter::setup_meters (int len, int initial_width)
{
      regular_meter_width = initial_width;
      uint32_t nmeters = _io->n_outputs();
      guint16 width;

      hide_all_meters ();

      Route* r;

      if ((r = dynamic_cast<Route*> (_io.get())) != 0) {

            switch (r->meter_point()) {
            case MeterPreFader:
            case MeterInput:
                  nmeters = r->n_inputs();
                  break;
            case MeterPostFader:
                  nmeters = r->n_outputs();
                  break;
            }

      } else {

            nmeters = _io->n_outputs();

      }

      if (nmeters == 0) {
            return;
      }

      if (nmeters <= 2) {
            width = regular_meter_width;
      } else {
            width = thin_meter_width;
      }

      while (meters.size() < nmeters) {
            meters.push_back (MeterInfo());
      }


      int b = ARDOUR_UI::config()->canvasvar_MeterColorBase.get();
      int m = ARDOUR_UI::config()->canvasvar_MeterColorMid.get();
      int t = ARDOUR_UI::config()->canvasvar_MeterColorTop.get();
      int c = ARDOUR_UI::config()->canvasvar_MeterColorClip.get();

      //cerr << "LevelMeter::setup_meters() called color_changed = " << color_changed << " colors: " << endl;//DEBUG

      for (int32_t n = nmeters-1; nmeters && n >= 0 ; --n) {
            if (meters[n].width != width || meters[n].length != len || color_changed) {
                  delete meters[n].meter;
                  meters[n].meter = new FastMeter ((uint32_t) floor (Config->get_meter_hold()), width, FastMeter::Vertical, len, b, m, t, c);
                  //cerr << "LevelMeter::setup_meters() w:l = " << width << ":" << len << endl;//DEBUG
                  meters[n].width = width;
                  meters[n].length = len;
                  meters[n].meter->add_events (Gdk::BUTTON_RELEASE_MASK);
                  meters[n].meter->signal_button_release_event().connect (bind (mem_fun(*this, &LevelMeter::meter_button_release), n));
            }

            pack_end (*meters[n].meter, false, false);
            meters[n].meter->show_all ();
            meters[n].packed = true;
      }
      show();
      color_changed = false;
}

gint
LevelMeter::meter_button_release (GdkEventButton* ev, uint32_t which)
{
      if (ev->button == 1) {
            clear_meters();
      }
      return true;
}
      

void LevelMeter::clear_meters ()
{
      for (vector<MeterInfo>::iterator i = meters.begin(); i < meters.end(); i++) {
            (*i).meter->clear();
      }
      max_peak = minus_infinity();
}

void LevelMeter::hide_meters ()
{
      hide_all_meters();
}

void
LevelMeter::color_handler ()
{
      color_changed = true;
}


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