from rsf.proj import *

def alias(n1):
    return '''
    math n1=%d d1=%g o1=0 output='(4.*(x1-40)/80)^2' |
    math output='0.5*cos(8*input)*exp(-input)'
    ''' % (n1,80.0/(n1-1))

def coord(n1):
    return '''
    math n1=%d d1=%g o1=0 output=x1
    ''' % (n1,80.0/(n1-1))

Flow('alias50',None,alias(50))
Flow('alias500',None,alias(500))
Plot('ideal','alias500','dots labelsz=14 labels=ideal')

Flow('head50','alias50','math output=x1')
Flow('push500','alias50 alias500 head50',
     'bin1 pattern=${SOURCES[1]} head=${SOURCES[2]}')
Plot('decim','push500',
     'dots dots=2 connect=0 strings=1 labelsz=14 labels=decimated')

Flow('coord500',None,coord(500))

Result('chirp','ideal decim','OverUnderAniso')

for size in (1,2,4,8):
    for interp in ('lag','cub','spl','kai'):
        test = 'int%d_%s' % (size,interp)
        Flow(test,'alias50 coord500 alias500',
             '''
             inttest1 interp=%s nw=%d coord=${SOURCES[1]} |
             add scale=1,-1 ${SOURCES[2]} |
             window f1=31 n1=438
             ''' % (interp,size))

        show = 'imp%d_%s' % (size,interp)
        spec = 'spc%d_%s' % (size,interp)
        if interp=='spl':
            Flow(show,None,
             '''
             intshow interp=%s nw=%d x=0.7 |
             pad n1=%d | reverse which=1 | pad n1=64 | reverse which=1 |
             splinefilter nw=%d
             ''' % (interp,size,32+size/2,size))
        else:
            Flow(show,None,
                 '''
                 intshow interp=%s nw=%d x=0.7 |
                 pad n1=%d | reverse which=1 | pad n1=64 | reverse which=1
                 ''' % (interp,size,32+size/2))
        Flow(spec,show,'spectra | scale dscale=8')

def graph(title):
    return 'cat axis=2 ${SOURCES[1]} | graph dash=1,0 title="%s" ' % title

alias = {
    'bin': ('1_lag', 'Nearest Neighbor'),
    'lin': ('2_lag', 'Linear'),
    'cub': ('4_cub', 'Cubic Convolution'),
    'spl4': ('4_spl', 'Spline-4'),
    'spl8': ('8_spl', 'Spline-8'),
    'kai': ('8_kai', 'Sinc-8')
    }

def error(name):
    first,second =Split(name)
    Result(first+second,'int%s int%s' % (alias[first][0],alias[second][0]),
           graph('%s vs %s' % (alias[first][1],alias[second][1])))

error('bin lin')
error('lin cub')
error('cub spl4')
error('cub kai')
error('kai spl8')

def spec(name):
    first,second =Split(name)
    both = first+second
    spec = 'spec'+both
    Plot(both,'imp%s imp%s' % (alias[second][0],alias[first][0]),
         '''
         cat axis=2 ${SOURCES[1]} |
         dots dots=2 connect=0 strings=1 labelsz=14 labels="%s:%s"
         ''' % (alias[second][1],alias[first][1]))
    Plot(spec,'spc%s spc%s' % (alias[first][0],alias[second][0]),
         graph('Spectrum'))
    Result(spec,[both,spec],'SideBySideAniso')

spec('lin cub')
spec('cub kai')
spec('cub spl4')
spec('kai spl8')

End()