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
27 if(steps[i].weight>=weight_limit)
28 return steps[i].speed;
32 for(low=i; low>0; --low)
33 if(steps[low].weight>=weight_limit)
35 for(high=i; high+1<steps.size(); ++high)
36 if(steps[high].weight>=weight_limit)
39 if(steps[high].weight)
42 return (steps[low].speed*(high-i)+steps[high].speed*(i-low))/(high-low);
44 return steps[high].speed*i/high;
46 else if(steps[low].weight)
47 return steps[low].speed*i/low;
52 float SpeedQuantizer::quantize_speed(float speed) const
54 return get_speed(find_speed_step(speed));
57 unsigned SpeedQuantizer::find_speed_step(float speed) const
59 if(speed<=steps[1].speed*0.5)
65 for(unsigned i=0; (!high && i<steps.size()); ++i)
66 if(steps[i].weight>=weight_limit)
69 if(steps[i].speed>=speed)
71 else if(steps[i].speed>steps[low].speed)
77 unsigned limit = steps.size()/5;
85 return min(min<unsigned>(low*speed/steps[low].speed, steps.size()-1), last+limit);
88 float f = (speed-steps[low].speed)/(steps[high].speed-steps[low].speed);
89 return static_cast<unsigned>(low*(1-f)+high*f+0.5);
92 void SpeedQuantizer::save(list<DataFile::Statement> &st) const
94 for(unsigned i=0; i<steps.size(); ++i)
96 st.push_back((DataFile::Statement("step"), i, steps[i].speed, steps[i].weight));
100 SpeedQuantizer::SpeedStep::SpeedStep():
105 void SpeedQuantizer::SpeedStep::add(float s, float w)
107 speed = (speed*weight+s*w)/(weight+w);
108 weight = min(weight+w, 300.0f);
112 SpeedQuantizer::Loader::Loader(SpeedQuantizer &q):
113 DataFile::ObjectLoader<SpeedQuantizer>(q)
115 add("step", &Loader::step);
118 void SpeedQuantizer::Loader::step(unsigned i, float s, float w)
120 if(i>=obj.steps.size())
123 obj.steps[i].speed = s;
124 obj.steps[i].weight = w;