1 #include "speedquantizer.h"
8 SpeedQuantizer::SpeedQuantizer(unsigned n):
13 throw invalid_argument("SpeedQuantizer::SpeedQuantizer");
16 void SpeedQuantizer::learn(unsigned i, float s, float w)
19 throw out_of_range("SpeedQuantizer::learn");
23 float SpeedQuantizer::get_speed(unsigned i) const
26 throw out_of_range("SpeedQuantizer::get_speed");
29 if(steps[i].weight>=weight_limit)
30 return steps[i].speed;
34 for(low=i; low>0; --low)
35 if(steps[low].weight>=weight_limit)
37 for(high=i; high+1<steps.size(); ++high)
38 if(steps[high].weight>=weight_limit)
41 if(steps[high].weight)
44 return (steps[low].speed*(high-i)+steps[high].speed*(i-low))/(high-low);
46 return steps[high].speed*i/high;
48 else if(steps[low].weight)
49 return steps[low].speed*i/low;
54 float SpeedQuantizer::quantize_speed(float speed) const
56 return get_speed(find_speed_step(speed));
59 unsigned SpeedQuantizer::find_speed_step(float speed) const
61 if(speed<=steps[1].speed*0.5)
67 for(unsigned i=0; (!high && i<steps.size()); ++i)
68 if(steps[i].weight>=weight_limit)
71 if(steps[i].speed>=speed)
73 else if(steps[i].speed>steps[low].speed)
79 unsigned limit = steps.size()/5;
87 return min(min<unsigned>(low*speed/steps[low].speed, steps.size()-1), last+limit);
90 float f = (speed-steps[low].speed)/(steps[high].speed-steps[low].speed);
91 return static_cast<unsigned>(low*(1-f)+high*f+0.5);
94 void SpeedQuantizer::save(list<DataFile::Statement> &st) const
96 for(unsigned i=0; i<steps.size(); ++i)
98 st.push_back((DataFile::Statement("step"), i, steps[i].speed, steps[i].weight));
102 SpeedQuantizer::SpeedStep::SpeedStep():
107 void SpeedQuantizer::SpeedStep::add(float s, float w)
109 speed = (speed*weight+s*w)/(weight+w);
110 weight = min(weight+w, 300.0f);
114 SpeedQuantizer::Loader::Loader(SpeedQuantizer &q):
115 DataFile::ObjectLoader<SpeedQuantizer>(q)
117 add("step", &Loader::step);
120 void SpeedQuantizer::Loader::step(unsigned i, float s, float w)
122 if(i>=obj.steps.size())
125 obj.steps[i].speed = s;
126 obj.steps[i].weight = w;