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# -*- coding: utf-8 -*-
"""
Copyright 2010 Olivier Belanger
This file is part of pyo, a python module to help digital signal
processing script creation.
pyo is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
pyo is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with pyo. If not, see <http://www.gnu.org/licenses/>.
"""
from math import pow, log10
######################################################################
### Map -> rescale values from sliders
######################################################################
class Map:
"""
Converts value between 0 and 1 on various scales.
Base class for Map objects.
Parameters:
min : int or float
Lowest value of the range.
max : int or float
Highest value of the range.
scale : string {'lin', 'log'}
Method used to scale the input value on the specified range.
Methods:
get(x) : Returns scaled value for `x` between 0 and 1.
set(x) : Returns the normalized value (0 -> 1) for `x` in the real range.
setMin(x) : Replaces the 'min' attribute.
setMax(x) : Replaces the 'max' attribute.
setScale(x) : Replaces the 'scale' attribute.
Attributes:
min : Lowest value of the range.
max : Highest value of the range.
scale : Method used to scale the input value.
Examples:
>>> m = Map(20., 20000., 'log')
>>> print m.get(.5)
632.455532034
>>> print m.set(12000)
0.926050416795
"""
def __init__(self, min, max, scale):
self._min, self._max, self._scale = float(min), float(max), scale
def get(self, x):
"""
Takes `x` between 0 and 1 and returns scaled value.
"""
if x < 0: x = 0.0
elif x > 1: x = 1.0
if self._scale == 'log':
return pow(10, x * log10(self._max/self._min) + log10(self._min))
else:
return (self._max - self._min) * x + self._min
def set(self, x):
"""
Takes `x` in the real range and returns value unscaled
(between 0 and 1).
"""
if self._scale == 'log':
return log10(x/self._min) / log10(self._max/self._min)
else:
return (x - self._min) / (self._max - self._min)
def setMin(self, x):
"""
Replace the `min` attribute.
Parameters:
x : float
New `min` attribute.
"""
self._min = x
def setMax(self, x):
"""
Replace the `max` attribute.
Parameters:
x : float
New `max` attribute.
"""
self._max = x
def setScale(self, x):
"""
Replace the `scale` attribute.
Parameters:
x : string
New `scale` attribute.
"""
self._scale = x
@property
def min(self): return self._min
@min.setter
def min(self, x): self.setMin(x)
@property
def max(self): return self._max
@max.setter
def max(self, x): self.setMax(x)
@property
def scale(self): return self._scale
@scale.setter
def scale(self, x): self.setScale(x)
class SLMap(Map):
"""
Base Map class used to manage control sliders.
Derived from Map class, a few parameters are added for sliders
initialization.
Parentclass: Map
Parameters:
min : int or float
Smallest value of the range.
max : int or float
Highest value of the range.
scale : string {'lin', 'log'}
Method used to scale the input value on the specified range.
name : string
Name of the attributes the slider is affected to.
init : int or float
Initial value. Specified in the real range, not between 0 and 1. Use
the `set` method to retreive the normalized corresponding value.
res : string {'int', 'float'}, optional
Sets the resolution of the slider. Defaults to 'float'.
ramp : float, optional
Ramp time, in seconds, used to smooth the signal sent from slider
to object's attribute. Defaults to 0.025.
Methods:
get(x) : Returns the scaled value for `x` between 0 and 1.
set(x) : Returns the normalized value (0 -> 1) for `x` in the real range.
Attributes:
min : Lowest value of the range.
max : Highest value of the range.
scale : Method used to scale the input value.
name : Name of the parameter to control.
init : Initial value of the slider.
res : Slider resolution {int or float}.
ramp : Ramp time in seconds.
Examples:
>>> s = Server().boot()
>>> ifs = [350,360,375,388]
>>> maps = [SLMap(20., 2000., 'log', 'freq', ifs), SLMap(0, 0.25, 'lin', 'feedback', 0), SLMapMul(.1)]
>>> a = SineLoop(freq=ifs, mul=.1).out()
>>> a.ctrl(maps)
"""
def __init__(self, min, max, scale, name, init, res='float', ramp=0.025):
Map.__init__(self, min, max, scale)
self._name, self._init, self._res, self._ramp = name, init, res, ramp
@property
def name(self): return self._name
@property
def init(self): return self._init
@property
def res(self): return self._res
@property
def ramp(self): return self._ramp
class SLMapFreq(SLMap):
"""
SLMap with normalized values for a 'freq' slider.
Parentclass: SLMap
Parameters:
init : int or float, optional
Initial value. Specified in the real range, not between 0 and 1.
Defaults to 1000.
SLMapFreq values are:
min = 20.0
max = 20000.0
scale = 'log'
name = 'freq'
res = 'float'
ramp = 0.025
Methods:
get(x) : Returns scaled value for `x` between 0 and 1.
set(x) : Returns the normalized value (0 -> 1) for `x` in the real range.
"""
def __init__(self, init=1000):
SLMap.__init__(self, 20., 20000., 'log', 'freq', init, 'float', 0.025)
class SLMapMul(SLMap):
"""
SLMap with normalized values for a 'mul' slider.
Parentclass: SLMap
Parameters:
init : int or float, optional
Initial value. Specified in the real range, not between 0 and 1.
Defaults to 1.
SLMapMul values are:
min = 0.0
max = 2.0
scale = 'lin'
name = 'mul'
res = 'float'
ramp = 0.025
Methods:
get(x) : Returns scaled value for `x` between 0 and 1.
set(x) : Returns the normalized value (0 -> 1) for `x` in the real range.
"""
def __init__(self, init=1.):
SLMap.__init__(self, 0., 2., 'lin', 'mul', init, 'float', 0.025)
class SLMapPhase(SLMap):
"""
SLMap with normalized values for a 'phase' slider.
Parentclass: SLMap
Parameters:
init : int or float, optional
Initial value. Specified in the real range, not between 0 and 1.
Defaults to 0.
SLMapPhase values are:
min = 0.0
max = 1.0
scale = 'lin'
name = 'phase'
res = 'float'
ramp = 0.025
Methods:
get(x) : Returns scaled value for `x` between 0 and 1.
set(x) : Returns the normalized value (0 -> 1) for `x` in the real range.
"""
def __init__(self, init=0.):
SLMap.__init__(self, 0., 1., 'lin', 'phase', init, 'float', 0.025)
class SLMapPan(SLMap):
"""
SLMap with normalized values for a 'pan' slider.
Parentclass: SLMap
Parameters:
init : int or float, optional
Initial value. Specified in the real range, not between 0 and 1.
Defaults to 0.
SLMapPhase values are:
min = 0.0
max = 1.0
scale = 'lin'
name = 'pan'
res = 'float'
ramp = 0.025
Methods:
get(x) : Returns scaled value for `x` between 0 and 1.
set(x) : Returns the normalized value (0 -> 1) for `x` in the real range.
"""
def __init__(self, init=0.):
SLMap.__init__(self, 0., 1., 'lin', 'pan', init, 'float', 0.025)
class SLMapQ(SLMap):
"""
SLMap with normalized values for a 'q' slider.
Parentclass: SLMap
Parameters:
init : int or float, optional
Initial value. Specified in the real range, not between 0 and 1.
Defaults to 1.
SLMapQ values are:
min = 0.1
max = 100.0
scale = 'log'
name = 'q'
res = 'float'
ramp = 0.025
Methods:
get(x) : Returns scaled value for `x` between 0 and 1.
set(x) : Returns the normalized value (0 -> 1) for `x` in the real range.
"""
def __init__(self, init=1.):
SLMap.__init__(self, 0.1, 100., 'log', 'q', init, 'float', 0.025)
class SLMapDur(SLMap):
"""
SLMap with normalized values for a 'dur' slider.
Parentclass: SLMap
Parameters:
init : int or float, optional
Initial value. Specified in the real range, not between 0 and 1.
Defaults to 1.
SLMapDur values are:
min = 0.
max = 60.0
scale = 'lin'
name = 'dur'
res = 'float'
ramp = 0.025
Methods:
get(x) : Returns scaled value for `x` between 0 and 1.
set(x) : Returns the normalized value (0 -> 1) for `x` in the real range.
"""
def __init__(self, init=1.):
SLMap.__init__(self, 0., 60., 'lin', 'dur', init, 'float', 0.025)
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