gtk2_ardour/level_meter.cc

   1 /*
   2   Copyright (C) 2002 Paul Davis
   3
   4   This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 of the License, or
   7   (at your option) any later version.
   8
   9   This program is distributed in the hope that it will be useful,
  10   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12   GNU General Public License for more details.
  13
  14   You should have received a copy of the GNU General Public License
  15   along with this program; if not, write to the Free Software
  16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <limits.h>
  21
  22 #include <ardour/io.h>
  23 #include <ardour/route.h>
  24 #include <ardour/route_group.h>
  25 #include <ardour/session.h>
  26 #include <ardour/session_route.h>
  27 #include <ardour/dB.h>
  28
  29 #include <gtkmm2ext/utils.h>
  30 #include <gtkmm2ext/fastmeter.h>
  31 #include <gtkmm2ext/stop_signal.h>
  32 #include <gtkmm2ext/barcontroller.h>
  33 #include <midi++/manager.h>
  34 #include <pbd/fastlog.h>
  35
  36 #include "ardour_ui.h"
  37 #include "level_meter.h"
  38 #include "utils.h"
  39 #include "logmeter.h"
  40 #include "gui_thread.h"
  41 #include "keyboard.h"
  42 #include "public_editor.h"
  43
  44 #include <ardour/session.h>
  45 #include <ardour/route.h>
  46
  47 #include "i18n.h"
  48
  49 using namespace ARDOUR;
  50 using namespace PBD;
  51 using namespace Gtkmm2ext;
  52 using namespace Gtk;
  53 using namespace sigc;
  54 using namespace std;
  55
  56 //sigc::signal<void> LevelMeter::ResetAllPeakDisplays;
  57 //sigc::signal<void,RouteGroup*> LevelMeter::ResetGroupPeakDisplays;
  58
  59
  60 LevelMeter::LevelMeter (Session& s)
  61         : _session (s)
  62
  63 {
  64         set_spacing (1);
  65         Config->ParameterChanged.connect (mem_fun (*this, &LevelMeter::parameter_changed));
  66         UI::instance()->theme_changed.connect (mem_fun(*this, &LevelMeter::on_theme_changed));
  67         ColorsChanged.connect (mem_fun (*this, &LevelMeter::color_handler));
  68         max_peak = minus_infinity();
  69 }
  70
  71 void
  72 LevelMeter::on_theme_changed()
  73 {
  74         style_changed = true;
  75 }
  76
  77 LevelMeter::~LevelMeter ()
  78 {
  79         for (vector<MeterInfo>::iterator i = meters.begin(); i != meters.end(); i++) {
  80                 if ((*i).meter) {
  81                         delete (*i).meter;
  82                 }
  83         }
  84 }
  85
  86 void
  87 LevelMeter::set_io (boost::shared_ptr<IO> io)
  88 {
  89         _io = io;
  90 }
  91
  92 float
  93 LevelMeter::update_meters ()
  94 {
  95         vector<MeterInfo>::iterator i;
  96         uint32_t n;
  97         float peak, mpeak;
  98
  99         for (n = 0, i = meters.begin(); i != meters.end(); ++i, ++n) {
 100                 if ((*i).packed) {
 101                         peak = _io->peak_input_power (n);
 102                         (*i).meter->set (log_meter (peak));
 103                         mpeak = _io->max_peak_power(n);
 104                         if (mpeak > max_peak) {
 105                                 max_peak = mpeak;
 106                         }
 107                 }
 108         }
 109         return max_peak;
 110 }
 111
 112 void
 113 LevelMeter::parameter_changed(const char* parameter_name)
 114 {
 115 #define PARAM_IS(x) (!strcmp (parameter_name, (x)))
 116
 117         ENSURE_GUI_THREAD (bind (mem_fun(*this, &LevelMeter::parameter_changed), parameter_name));
 118
 119         if (PARAM_IS ("meter-hold")) {
 120
 121                 vector<MeterInfo>::iterator i;
 122                 uint32_t n;
 123
 124                 for (n = 0, i = meters.begin(); i != meters.end(); ++i, ++n) {
 125
 126                         (*i).meter->set_hold_count ((uint32_t) floor(Config->get_meter_hold()));
 127                 }
 128         }
 129
 130 #undef PARAM_IS
 131 }
 132
 133 void
 134 LevelMeter::hide_all_meters ()
 135 {
 136
 137         for (vector<MeterInfo>::iterator i = meters.begin(); i != meters.end(); ++i) {
 138                 if ((*i).packed) {
 139                         remove (*((*i).meter));
 140                         (*i).packed = false;
 141                 }
 142         }
 143 }
 144
 145 void
 146 LevelMeter::setup_meters (int len, int initial_width)
 147 {
 148         if (!_io) {
 149                 return; /* do it later */
 150         }
 151
 152         regular_meter_width = initial_width;
 153         uint32_t nmeters = _io->n_outputs();
 154         guint16 width;
 155
 156         hide_all_meters ();
 157
 158         Route* r;
 159
 160         if ((r = dynamic_cast<Route*> (_io.get())) != 0) {
 161
 162                 switch (r->meter_point()) {
 163                 case MeterPreFader:
 164                 case MeterInput:
 165                         nmeters = r->n_inputs();
 166                         break;
 167                 case MeterPostFader:
 168                         nmeters = r->n_outputs();
 169                         break;
 170                 }
 171
 172         } else {
 173
 174                 nmeters = _io->n_outputs();
 175
 176         }
 177
 178         if (nmeters == 0) {
 179                 return;
 180         }
 181
 182         if (nmeters <= 2) {
 183                 width = regular_meter_width;
 184         } else {
 185                 width = thin_meter_width;
 186         }
 187
 188         while (meters.size() < nmeters) {
 189                 meters.push_back (MeterInfo());
 190         }
 191
 192
 193         int b = ARDOUR_UI::config()->canvasvar_MeterColorBase.get();
 194         int m = ARDOUR_UI::config()->canvasvar_MeterColorMid.get();
 195         int t = ARDOUR_UI::config()->canvasvar_MeterColorTop.get();
 196         int c = ARDOUR_UI::config()->canvasvar_MeterColorClip.get();
 197
 198         //cerr << "LevelMeter::setup_meters() called color_changed = " << color_changed << " colors: " << endl;//DEBUG
 199
 200         for (int32_t n = nmeters-1; nmeters && n >= 0 ; --n) {
 201                 if (meters[n].width != width || meters[n].length != len || color_changed) {
 202                         delete meters[n].meter;
 203                         meters[n].meter = new FastMeter ((uint32_t) floor (Config->get_meter_hold()), width, FastMeter::Vertical, len, b, m, t, c);
 204                         //cerr << "LevelMeter::setup_meters() w:l = " << width << ":" << len << endl;//DEBUG
 205                         meters[n].width = width;
 206                         meters[n].length = len;
 207                         meters[n].meter->add_events (Gdk::BUTTON_RELEASE_MASK);
 208                         meters[n].meter->signal_button_release_event().connect (bind (mem_fun(*this, &LevelMeter::meter_button_release), n));
 209                 }
 210
 211                 pack_end (*meters[n].meter, false, false);
 212                 meters[n].meter->show_all ();
 213                 meters[n].packed = true;
 214         }
 215         show();
 216         color_changed = false;
 217 }
 218
 219 gint
 220 LevelMeter::meter_button_release (GdkEventButton* ev, uint32_t which)
 221 {
 222         if (ev->button == 1) {
 223                 clear_meters();
 224         }
 225         return true;
 226 }
 227
 228
 229 void LevelMeter::clear_meters ()
 230 {
 231         for (vector<MeterInfo>::iterator i = meters.begin(); i < meters.end(); i++) {
 232                 (*i).meter->clear();
 233         }
 234         max_peak = minus_infinity();
 235 }
 236
 237 void LevelMeter::hide_meters ()
 238 {
 239         hide_all_meters();
 240 }
 241
 242 void
 243 LevelMeter::color_handler ()
 244 {
 245         color_changed = true;
 246 }
 247