GNU Radio 3.4.2 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2002 Free Software Foundation, Inc. 00004 * 00005 * This file is part of GNU Radio 00006 * 00007 * GNU Radio is free software; you can redistribute it and/or modify 00008 * it under the terms of the GNU General Public License as published by 00009 * the Free Software Foundation; either version 3, or (at your option) 00010 * any later version. 00011 * 00012 * GNU Radio is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with GNU Radio; see the file COPYING. If not, write to 00019 * the Free Software Foundation, Inc., 51 Franklin Street, 00020 * Boston, MA 02110-1301, USA. 00021 */ 00022 00023 #ifndef _ATSC_TRELLIS_ENCODER_H_ 00024 #define _ATSC_TRELLIS_ENCODER_H_ 00025 00026 #include <atsci_basic_trellis_encoder.h> 00027 #include <atsc_types.h> 00028 00029 /*! 00030 * \brief fancy, schmancy 12-way interleaved trellis encoder for ATSC 00031 */ 00032 00033 class atsci_trellis_encoder { 00034 public: 00035 static const int NCODERS = 12; 00036 00037 atsci_trellis_encoder (); 00038 ~atsci_trellis_encoder (); 00039 00040 //! reset all encoder states 00041 void reset (); 00042 00043 /*! 00044 * Take 12 RS encoded, convolutionally interleaved segments and 00045 * produce 12 trellis coded data segments. We work in groups of 12 00046 * because that's the smallest number of segments that composes a 00047 * single full cycle of the encoder mux. 00048 */ 00049 void encode (atsc_data_segment out[NCODERS], 00050 const atsc_mpeg_packet_rs_encoded in[NCODERS]); 00051 00052 00053 protected: 00054 static const int SEGMENT_SIZE = ATSC_MPEG_RS_ENCODED_LENGTH; // 207 00055 static const int INPUT_SIZE = (SEGMENT_SIZE * 12); 00056 static const int OUTPUT_SIZE = (ATSC_DATA_SEGMENT_LENGTH * 12); 00057 00058 void encode_helper (unsigned char out[OUTPUT_SIZE], 00059 const unsigned char in[INPUT_SIZE]); 00060 00061 atsci_basic_trellis_encoder enc[NCODERS]; 00062 bool debug; 00063 }; 00064 00065 00066 #endif /* _ATSC_TRELLIS_ENCODER_H_ */