#!/usr/bin/env python2
#
# Copyright 2014 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio 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, or (at your option)
# any later version.
#
# GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#

from gnuradio import gr, blocks
import fec_swig as fec
import math

class capillary_threaded_decoder(gr.hier_block2):
    def __init__(self, decoder_list_0, input_size, output_size):
        gr.hier_block2.__init__(
            self, "Capillary Threaded Decoder",
            gr.io_signature(1, 1, input_size*1),
            gr.io_signature(1, 1, output_size*1))

        self.decoder_list_0 = decoder_list_0

        check = math.log10(len(self.decoder_list_0)) / math.log10(2.0)
        if(abs(check - int(check)) > 0):
            gr.log.info("fec.capillary_threaded_decoder: number of decoders must be a power of 2.")
            raise AttributeError

        self.deinterleaves_0 = []
        for i in range(int(math.log(len(decoder_list_0), 2))):
            for j in range(int(math.pow(2, i))):
                self.deinterleaves_0.append(blocks.deinterleave(input_size,
                                                                fec.get_decoder_input_size(decoder_list_0[0])))

        self.generic_decoders_0 = []
        for i in range(len(decoder_list_0)):
            self.generic_decoders_0.append(fec.decoder(decoder_list_0[i], input_size, output_size))

        self.interleaves_0 = []
        for i in range(int(math.log(len(decoder_list_0), 2))):
            for j in range(int(math.pow(2, i))):
                self.interleaves_0.append(blocks.interleave(output_size,
                                                            fec.get_decoder_output_size(decoder_list_0[0])))

        rootcount = 0
        branchcount = 1
        for i in range(int(math.log(len(decoder_list_0), 2)) - 1):
            for j in range(int(math.pow(2, i))):
                self.connect((self.deinterleaves_0[rootcount], 0), (self.deinterleaves_0[branchcount], 0))
                self.connect((self.deinterleaves_0[rootcount], 1), (self.deinterleaves_0[branchcount + 1], 0))
                rootcount += 1
                branchcount += 2

        codercount = 0
        for i in range(len(decoder_list_0)/2):
            self.connect((self.deinterleaves_0[rootcount], 0), (self.generic_decoders_0[codercount], 0))
            self.connect((self.deinterleaves_0[rootcount], 1), (self.generic_decoders_0[codercount + 1], 0))
            rootcount += 1
            codercount += 2

        rootcount = 0
        branchcount = 1
        for i in range(int(math.log(len(decoder_list_0), 2)) - 1):
            for j in range(int(math.pow(2, i))):
                self.connect((self.interleaves_0[branchcount], 0), (self.interleaves_0[rootcount], 0))
                self.connect((self.interleaves_0[branchcount + 1], 0), (self.interleaves_0[rootcount], 1))
                rootcount += 1
                branchcount += 2

        codercount = 0
        for i in range(len(decoder_list_0)/2):
            self.connect((self.generic_decoders_0[codercount], 0), (self.interleaves_0[rootcount], 0))
            self.connect((self.generic_decoders_0[codercount + 1], 0), (self.interleaves_0[rootcount], 1))
            rootcount += 1
            codercount += 2

        if ((len(self.decoder_list_0)) > 1):
            self.connect((self, 0), (self.deinterleaves_0[0], 0))
            self.connect((self.interleaves_0[0], 0), (self, 0))
        else:
            self.connect((self, 0), (self.generic_decoders_0[0], 0))
            self.connect((self.generic_decoders_0[0], 0), (self, 0))

    def get_decoder_list_0(self):
        return self.decoder_list_0

    def set_decoder_list_0(self, decoder_list_0):
        self.decoder_list_0 = decoder_list_0
