3 * Copyright 2002 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
23 #include <GrAtscRSDecoder.h>
25 // typedefs for fundamental i/o types
27 typedef atsc_mpeg_packet_rs_encoded iType;
28 typedef atsc_mpeg_packet_no_sync oType;
30 static const int NUMBER_OF_OUTPUTS = 1; // # of output streams (almost always one)
33 GrAtscRSDecoder::GrAtscRSDecoder ()
34 : VrHistoryProc<iType,oType> (NUMBER_OF_OUTPUTS)
36 // 1 + number of extra input elements at which we look. This is
37 // used by the superclass's forecast routine to get us the correct
38 // range on our inputs.
39 // We're one-to-one input-to-output so set it to 1.
42 // any other init here.
45 GrAtscRSDecoder::~GrAtscRSDecoder ()
47 // Anything that isn't automatically cleaned up...
51 * This is the real work horse. In general this interface can handle
52 * multiple streams of input and output, but we almost always
53 * use a single input and output stream.
57 GrAtscRSDecoder::work (VrSampleRange output, void *ao[],
58 VrSampleRange inputs[], void *ai[])
60 // construct some nicer i/o pointers to work with.
62 iType *in = ((iType **) ai)[0];
63 oType *out = ((oType **) ao)[0];
66 // We must produce output.size units of output.
68 for (unsigned int i = 0; i < output.size; i++){
69 assert (in[i].pli.regular_seg_p ());
70 out[i].pli = in[i].pli; // copy pipeline info
72 int nerrors_not_corrected = rs_decoder.decode (out[i], in[i]);
73 out[i].pli.set_transport_error (nerrors_not_corrected == -1);
76 // Return the number of units we produced.
77 // Note that for all intents and purposes, it is an error to
78 // produce less than you are asked for.