def VU_rowview(v, m, i): mattr=vsip.getattrib(m) vattr=vsip.getattrib(v) vattr.offset = mattr.offset + i * mattr.col_stride vattr.length = mattr.row_length vattr.stride = mattr.row_stride vsip.putattrib(v,vattr);
def noise_sim(self):
from numpy import pi, cos
d_t=self.d_t * self.Fs #sensor-to-sensor travel time at end-fire in samples
o_0 = d_t * self.Nsens + 1 # array travel time at end-fire in samples
a_stp = pi/self.Nsim_noise # angle step
bl_attr = vsip.getattrib(self.bl_noise)
for j in range(self.Nsim_noise):
a_crct = cos(float(j) * a_stp)
vsip.randn(self.rand,self.noise)
vsip.firfilt(self.fir,self.noise,self.bl_noise)
vsip.mul(12.0/float(self.Nsim_noise),self.bl_noise,self.bl_noise)
vsip.putlength(self.bl_noise,self.Nts);
for i in range(self.Nsens):
vsip.putoffset(self.bl_noise,int(o_0 + i * d_t * a_crct))
VU_rowview(self.v_data,self.m_data,i)
vsip.add(self.bl_noise,self.v_data,self.v_data)
vsip.putattrib(self.bl_noise,bl_attr);
vsip.add(-vsip.meanval(self.m_data),self.m_data,self.m_data);
def vView(x,o,s,l):
""" vView(x,o,s,l) returns the view x with offset, stride and
length (o,s,l) .
This could also be done with vsiputils using
bind(vsip.block(x),(o,s,l))
except that bind will create a new object that will need to
be allocated and destroyed.
vView will modify the supplied object x.
"""
t=['vview_f', 'vview_d',
'cvview_f','cvview_d',
'vview_i','vview_si','vview_uc','vview_vi',
'vview_bl','vview_mi']
myT=vsip.getType(x)[1]
if myT in t:
attr=vsip.getattrib(x)
attr.offset=o; attr.stride=s; attr.length=l
return vsip.putattrib(x,attr)
else:
print('type ' + myT + ' not supported by vView')
def vView(x, o, s, l):
""" vView(x,o,s,l) returns the view x with offset, stride and
length (o,s,l) .
This could also be done with vsiputils using
bind(vsip.block(x),(o,s,l))
except that bind will create a new object that will need to
be allocated and destroyed.
vView will modify the supplied object x.
"""
t = [
'vview_f', 'vview_d', 'cvview_f', 'cvview_d', 'vview_i', 'vview_si',
'vview_uc', 'vview_vi', 'vview_bl', 'vview_mi'
]
myT = vsip.getType(x)[1]
if myT in t:
attr = vsip.getattrib(x)
attr.offset = o
attr.stride = s
attr.length = l
return vsip.putattrib(x, attr)
else:
print('type ' + myT + ' not supported by vView')
