#!/usr/bin/env python
##################################################
# Gnuradio Python Flow Graph
# Title: integration block with large decimation segfaults
# Author: Martin Dudok van Heel
# Description: an integrate block crashes with segfault with decimation 262144 or above. Probably accessing input buffer outside valid region.
# Generated: Thu Feb 12 22:58:34 2015
##################################################

from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio.eng_option import eng_option
from gnuradio.filter import firdes
from optparse import OptionParser

class test_large_decimation_crash_integrate_ff(gr.top_block):

    def __init__(self, decimation=262144):
        gr.top_block.__init__(self, "integration block with large decimation segfaults")

        ##################################################
        # Parameters
        ##################################################
        self.decimation = decimation

        ##################################################
        # Blocks
        ##################################################
        self.null_source = blocks.null_source(gr.sizeof_float*1)
        self.null_sink = blocks.null_sink(gr.sizeof_float*1)
        self.integrate_ff = blocks.integrate_ff(decimation)

        ##################################################
        # Connections
        ##################################################
        self.connect((self.integrate_ff, 0), (self.null_sink, 0))    
        self.connect((self.null_source, 0), (self.integrate_ff, 0))    


    def get_decimation(self):
        return self.decimation

    def set_decimation(self, decimation):
        self.decimation = decimation

if __name__ == '__main__':
    parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
    parser.add_option("-d", "--decimation", dest="decimation", type="intx", default=262144,
        help="Set decimation. 262143 succeeds but 262144 and above fails with segfault [default=%default]")
    (options, args) = parser.parse_args()
    tb = test_large_decimation_crash_integrate_ff(decimation=options.decimation)
    tb.start()
    tb.wait()