diff options
Diffstat (limited to 'gr-atsc/lib/GrAtscRSDecoder.cc')
-rw-r--r-- | gr-atsc/lib/GrAtscRSDecoder.cc | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/gr-atsc/lib/GrAtscRSDecoder.cc b/gr-atsc/lib/GrAtscRSDecoder.cc new file mode 100644 index 0000000000..211c569efd --- /dev/null +++ b/gr-atsc/lib/GrAtscRSDecoder.cc @@ -0,0 +1,81 @@ +/* -*- c++ -*- */ +/* + * Copyright 2002 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. + */ + +#include <atsc/GrAtscRSDecoder.h> + +// typedefs for fundamental i/o types + +typedef atsc_mpeg_packet_rs_encoded iType; +typedef atsc_mpeg_packet_no_sync oType; + +static const int NUMBER_OF_OUTPUTS = 1; // # of output streams (almost always one) + + +GrAtscRSDecoder::GrAtscRSDecoder () + : VrHistoryProc<iType,oType> (NUMBER_OF_OUTPUTS) +{ + // 1 + number of extra input elements at which we look. This is + // used by the superclass's forecast routine to get us the correct + // range on our inputs. + // We're one-to-one input-to-output so set it to 1. + history = 1; + + // any other init here. +} + +GrAtscRSDecoder::~GrAtscRSDecoder () +{ + // Anything that isn't automatically cleaned up... +} + +/* + * This is the real work horse. In general this interface can handle + * multiple streams of input and output, but we almost always + * use a single input and output stream. + */ + +int +GrAtscRSDecoder::work (VrSampleRange output, void *ao[], + VrSampleRange inputs[], void *ai[]) +{ + // construct some nicer i/o pointers to work with. + + iType *in = ((iType **) ai)[0]; + oType *out = ((oType **) ao)[0]; + + + // We must produce output.size units of output. + + for (unsigned int i = 0; i < output.size; i++){ + assert (in[i].pli.regular_seg_p ()); + out[i].pli = in[i].pli; // copy pipeline info + + int nerrors_not_corrected = rs_decoder.decode (out[i], in[i]); + out[i].pli.set_transport_error (nerrors_not_corrected == -1); + } + + // Return the number of units we produced. + // Note that for all intents and purposes, it is an error to + // produce less than you are asked for. + + return output.size; +} |