src/quicktune.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "quicktune.h"
  21 #include "threading/mutex.h"
  22 #include "threading/mutex_auto_lock.h"
  23 #include "util/string.h"
  24
  25 std::string QuicktuneValue::getString()
  26 {
  27         switch(type){
  28         case QVT_NONE:
  29                 return "(none)";
  30         case QVT_FLOAT:
  31                 return ftos(value_QVT_FLOAT.current);
  32         }
  33         return "<invalid type>";
  34 }
  35 void QuicktuneValue::relativeAdd(float amount)
  36 {
  37         switch(type){
  38         case QVT_NONE:
  39                 break;
  40         case QVT_FLOAT:
  41                 value_QVT_FLOAT.current += amount * (value_QVT_FLOAT.max - value_QVT_FLOAT.min);
  42                 if(value_QVT_FLOAT.current > value_QVT_FLOAT.max)
  43                         value_QVT_FLOAT.current = value_QVT_FLOAT.max;
  44                 if(value_QVT_FLOAT.current < value_QVT_FLOAT.min)
  45                         value_QVT_FLOAT.current = value_QVT_FLOAT.min;
  46                 break;
  47         }
  48 }
  49
  50 static std::map<std::string, QuicktuneValue> g_values;
  51 static std::vector<std::string> g_names;
  52 Mutex *g_mutex = NULL;
  53
  54 static void makeMutex()
  55 {
  56         if(!g_mutex){
  57                 g_mutex = new Mutex();
  58         }
  59 }
  60
  61 std::vector<std::string> getQuicktuneNames()
  62 {
  63         return g_names;
  64 }
  65
  66 QuicktuneValue getQuicktuneValue(const std::string &name)
  67 {
  68         makeMutex();
  69         MutexAutoLock lock(*g_mutex);
  70         std::map<std::string, QuicktuneValue>::iterator i = g_values.find(name);
  71         if(i == g_values.end()){
  72                 QuicktuneValue val;
  73                 val.type = QVT_NONE;
  74                 return val;
  75         }
  76         return i->second;
  77 }
  78
  79 void setQuicktuneValue(const std::string &name, const QuicktuneValue &val)
  80 {
  81         makeMutex();
  82         MutexAutoLock lock(*g_mutex);
  83         g_values[name] = val;
  84         g_values[name].modified = true;
  85 }
  86
  87 void updateQuicktuneValue(const std::string &name, QuicktuneValue &val)
  88 {
  89         makeMutex();
  90         MutexAutoLock lock(*g_mutex);
  91         std::map<std::string, QuicktuneValue>::iterator i = g_values.find(name);
  92         if(i == g_values.end()){
  93                 g_values[name] = val;
  94                 g_names.push_back(name);
  95                 return;
  96         }
  97         QuicktuneValue &ref = i->second;
  98         if(ref.modified)
  99                 val = ref;
 100         else{
 101                 ref = val;
 102                 ref.modified = false;
 103         }
 104 }
 105