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* Copyright 2002 Free Software Foundation, Inc.
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* This file is part of GNU Radio
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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#ifndef _GRATSCSYMBOLMAPPER_H_
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#define _GRATSCSYMBOLMAPPER_H_
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#include <VrInterpolatingSigProcNoWork.h>
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#include <atsc_types.h>
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* \brief take atsc_data_segments and map them to symbols.
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* Input is a stream of atsc_data_segments.
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* Output is a stream of symbols at 1x the symbol rate
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* This module performs the signal mapping & pilot addition.
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class GrAtscSymbolMapper
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: public VrInterpolatingSigProcNoWork<atsc_data_segment, oType> {
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: VrInterpolatingSigProcNoWork<atsc_data_segment, oType>(1, INTERP_FACTOR) {};
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~GrAtscSymbolMapper () {};
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const char *name () { return "GrAtscSymbolMapper"; }
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int work (VrSampleRange output, void *ao[],
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VrSampleRange inputs[], void *ai[]);
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static const int INTERP_FACTOR = ATSC_DATA_SEGMENT_LENGTH;
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GrAtscSymbolMapper<oType>::work (VrSampleRange output, void *ao[],
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VrSampleRange inputs[], void *ai[])
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atsc_data_segment *in = ((atsc_data_segment **) ai)[0];
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oType *out = ((oType **) ao)[0];
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assert ((output.size % INTERP_FACTOR) == 0);
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static const float pilot_add = 1.25;
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static const float map[8] = {
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unsigned int nsegs = output.size / INTERP_FACTOR;
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for (unsigned int n = 0; n < nsegs; n++){
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unsigned char *symbol = in[n].data;
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for (int i = 0; i < ATSC_DATA_SEGMENT_LENGTH; i++){
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out[oo++] = (oType) map[symbol[i] & 0x7];
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assert (oo == output.size);
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#endif /* _GRATSCSYMBOLMAPPER_H_ */