src/util/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_auto_lock.h"
  22 #include "util/string.h"
  23
  24 std::string QuicktuneValue::getString()
  25 {
  26         switch(type){
  27         case QVT_NONE:
  28                 return "(none)";
  29         case QVT_FLOAT:
  30                 return ftos(value_QVT_FLOAT.current);
  31         }
  32         return "<invalid type>";
  33 }
  34 void QuicktuneValue::relativeAdd(float amount)
  35 {
  36         switch(type){
  37         case QVT_NONE:
  38                 break;
  39         case QVT_FLOAT:
  40                 value_QVT_FLOAT.current += amount * (value_QVT_FLOAT.max - value_QVT_FLOAT.min);
  41                 if(value_QVT_FLOAT.current > value_QVT_FLOAT.max)
  42                         value_QVT_FLOAT.current = value_QVT_FLOAT.max;
  43                 if(value_QVT_FLOAT.current < value_QVT_FLOAT.min)
  44                         value_QVT_FLOAT.current = value_QVT_FLOAT.min;
  45                 break;
  46         }
  47 }
  48
  49 static std::map<std::string, QuicktuneValue> g_values;
  50 static std::vector<std::string> g_names;
  51 std::mutex *g_mutex = NULL;
  52
  53 static void makeMutex()
  54 {
  55         if(!g_mutex){
  56                 g_mutex = new std::mutex();
  57         }
  58 }
  59
  60 std::vector<std::string> getQuicktuneNames()
  61 {
  62         return g_names;
  63 }
  64
  65 QuicktuneValue getQuicktuneValue(const std::string &name)
  66 {
  67         makeMutex();
  68         MutexAutoLock lock(*g_mutex);
  69         std::map<std::string, QuicktuneValue>::iterator i = g_values.find(name);
  70         if(i == g_values.end()){
  71                 QuicktuneValue val;
  72                 val.type = QVT_NONE;
  73                 return val;
  74         }
  75         return i->second;
  76 }
  77
  78 void setQuicktuneValue(const std::string &name, const QuicktuneValue &val)
  79 {
  80         makeMutex();
  81         MutexAutoLock lock(*g_mutex);
  82         g_values[name] = val;
  83         g_values[name].modified = true;
  84 }
  85
  86 void updateQuicktuneValue(const std::string &name, QuicktuneValue &val)
  87 {
  88         makeMutex();
  89         MutexAutoLock lock(*g_mutex);
  90         std::map<std::string, QuicktuneValue>::iterator i = g_values.find(name);
  91         if(i == g_values.end()){
  92                 g_values[name] = val;
  93                 g_names.push_back(name);
  94                 return;
  95         }
  96         QuicktuneValue &ref = i->second;
  97         if(ref.modified)
  98                 val = ref;
  99         else{
 100                 ref = val;
 101                 ref.modified = false;
 102         }
 103 }
 104