diff options
Diffstat (limited to 'gr-dtv/lib/atsc/atsc_fs_checker_impl.h')
| -rw-r--r-- | gr-dtv/lib/atsc/atsc_fs_checker_impl.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/gr-dtv/lib/atsc/atsc_fs_checker_impl.h b/gr-dtv/lib/atsc/atsc_fs_checker_impl.h new file mode 100644 index 0000000000..1210ae5830 --- /dev/null +++ b/gr-dtv/lib/atsc/atsc_fs_checker_impl.h @@ -0,0 +1,67 @@ +/* -*- c++ -*- */ +/* + * 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. + */ + +#ifndef INCLUDED_DTV_ATSC_FS_CHECKER_IMPL_H +#define INCLUDED_DTV_ATSC_FS_CHECKER_IMPL_H + +#include <gnuradio/dtv/atsc_fs_checker.h> +#include "atsc_syminfo_impl.h" + +namespace gr { + namespace dtv { + + class atsc_fs_checker_impl : public atsc_fs_checker + { + private: + static const int SRSIZE = 1024; // must be power of two + int d_index; // points at oldest sample + float d_sample_sr[SRSIZE]; // sample shift register + atsc::syminfo d_tag_sr[SRSIZE]; // tag shift register + unsigned char d_bit_sr[SRSIZE]; // binary decision shift register + int d_field_num; + int d_segment_num; + + static const int OFFSET_511 = 4; // offset to second PN 63 pattern + static const int LENGTH_511 = 511; // length of PN 63 pattern + static const int OFFSET_2ND_63 = 578; // offset to second PN 63 pattern + static const int LENGTH_2ND_63 = 63; // length of PN 63 pattern + + inline static int wrap (int index){ return index & (SRSIZE - 1); } + inline static int incr (int index){ return wrap (index + 1); } + inline static int decr (int index){ return wrap (index - 1); } + + public: + atsc_fs_checker_impl(); + ~atsc_fs_checker_impl(); + + void reset(); + + virtual int general_work(int noutput_items, + gr_vector_int &ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); + }; + + } /* namespace dtv */ +} /* namespace gr */ + +#endif /* INCLUDED_DTV_ATSC_FS_CHECKER_IMPL_H */ |