[Discuss-gnuradio] blks2.synthesis_filterbank

[benjar]

Hey guys,

I was wondering if the whole hier_block2 thing was working yet.  I tried to
run the blks2.synthesis_filterbank in a manner that seemed appropriate and
got the following error:

terminate called after throwing an instance of 'std::runtime_error'
  what():  streams_to_stream(5): insufficient connected output ports (2
needed, 1 connected)

Is this a bug in the filterbank code, or does this have to do with
hier_block2 not working yet?

Any help would be greatly appreciated.  Thanks!

-Ben  

Here's the source code:
-------------------------
#!/usr/bin/env python

from gnuradio import gr,blks2
import time
class PTestMe(gr.top_block):
    def __init__(self):
        gr.top_block.__init__(self)
        sample_rate = 200

        mpoints = 4;
        taps = gr.firdes.low_pass(1,   # gain
                              1,   # rate
                              1.0/mpoints * 0.5,  # cutoff
                              1.0/mpoints * 0.1,  # trans width
                              gr.firdes.WIN_HANN)

 

        self.synth = blks2.synthesis_filterbank(mpoints,taps)
        self.src0 = gr.sig_source_c (sample_rate, gr.GR_SIN_WAVE, 10, 1.0)
        self.src1 = gr.null_source(gr.sizeof_gr_complex)
        self.src2 = gr.null_source(gr.sizeof_gr_complex) 
        self.src3 = gr.null_source(gr.sizeof_gr_complex)

        self.thr = gr.throttle(gr.sizeof_gr_complex, sample_rate)
  
        self.dst = gr.file_sink( gr.sizeof_gr_complex,'bentest.dat')
        #self.dst = gr.vector_sink_c()

        self.connect(self.src0,(self.synth,0))
        self.connect(self.src1,(self.synth,1))
        self.connect(self.src2,(self.synth,2))
        self.connect(self.src3,(self.synth,3))
        self.connect(self.synth,self.thr,self.dst)

if __name__ == '__main__':
    test = PTestMe();
    test.start()
    time.sleep(1)
    test.stop() 
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