diff options
Diffstat (limited to 'gr-atsc/lib/atsc_field_sync_mux.cc')
| -rw-r--r-- | gr-atsc/lib/atsc_field_sync_mux.cc | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/gr-atsc/lib/atsc_field_sync_mux.cc b/gr-atsc/lib/atsc_field_sync_mux.cc deleted file mode 100644 index 6b0586dbfc..0000000000 --- a/gr-atsc/lib/atsc_field_sync_mux.cc +++ /dev/null @@ -1,205 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2006,2010 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. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <gnuradio/atsc/field_sync_mux.h> -#include <gnuradio/io_signature.h> -#include <gnuradio/atsc/consts.h> -#include <gnuradio/atsc/pnXXX_impl.h> - - -atsc_field_sync_mux_sptr -atsc_make_field_sync_mux() -{ - return gnuradio::get_initial_sptr(new atsc_field_sync_mux()); -} - -atsc_field_sync_mux::atsc_field_sync_mux() - : gr::block("atsc_field_sync_mux", - gr::io_signature::make(1, 1, sizeof(atsc_data_segment)), - gr::io_signature::make(1, 1, sizeof(atsc_data_segment))) -{ - reset(); -} - -static const int NUMBER_OF_OUTPUTS = 1; // # of output streams (almost always one) - -static const int N_SAVED_SYMBOLS = atsc_field_sync_mux::N_SAVED_SYMBOLS; - -static void -init_field_sync_common (unsigned char *p, int mask, - const unsigned char saved_symbols[N_SAVED_SYMBOLS]) -{ - static const unsigned char bin_map[2] = { 1, 6 }; // map binary values to 1 of 8 levels - - int i = 0; - - p[i++] = bin_map[1]; // data segment sync pulse - p[i++] = bin_map[0]; - p[i++] = bin_map[0]; - p[i++] = bin_map[1]; - - for (int j = 0; j < 511; j++) // PN511 - p[i++] = bin_map[atsc_pn511[j]]; - - for (int j = 0; j < 63; j++) // PN63 - p[i++] = bin_map[atsc_pn63[j]]; - - for (int j = 0; j < 63; j++) // PN63, toggled on field 2 - p[i++] = bin_map[atsc_pn63[j] ^ mask]; - - for (int j = 0; j < 63; j++) // PN63 - p[i++] = bin_map[atsc_pn63[j]]; - - p[i++] = bin_map[0]; // 24 bits of VSB8 mode identifiera - p[i++] = bin_map[0]; - p[i++] = bin_map[0]; - p[i++] = bin_map[0]; - - p[i++] = bin_map[1]; - p[i++] = bin_map[0]; - p[i++] = bin_map[1]; - p[i++] = bin_map[0]; - - p[i++] = bin_map[0]; - p[i++] = bin_map[1]; - p[i++] = bin_map[0]; - p[i++] = bin_map[1]; - - p[i++] = bin_map[1]; - p[i++] = bin_map[1]; - p[i++] = bin_map[1]; - p[i++] = bin_map[1]; - - p[i++] = bin_map[0]; - p[i++] = bin_map[1]; - p[i++] = bin_map[0]; - p[i++] = bin_map[1]; - - p[i++] = bin_map[1]; - p[i++] = bin_map[0]; - p[i++] = bin_map[1]; - p[i++] = bin_map[0]; - - - for (int j = 0; j < 92; j++) // 92 more bits - p[i++] = bin_map[atsc_pn63[j % 63]]; - - // now copy the last 12 symbols of the previous segment - - for (int j = 0; j < N_SAVED_SYMBOLS; j++) - p[i++] = saved_symbols[j]; - - assert (i == ATSC_DATA_SEGMENT_LENGTH); -} -inline static void -init_field_sync_1 (atsc_data_segment *s, - const unsigned char saved_symbols[N_SAVED_SYMBOLS]) -{ - init_field_sync_common (&s->data[0], 0, saved_symbols); -} - -inline static void -init_field_sync_2 (atsc_data_segment *s, - const unsigned char saved_symbols[N_SAVED_SYMBOLS]) - -{ - init_field_sync_common (&s->data[0], 1, saved_symbols); -} - -static void -save_last_symbols (unsigned char saved_symbols[N_SAVED_SYMBOLS], - const atsc_data_segment &seg) -{ - for (int i = 0; i < N_SAVED_SYMBOLS; i++) - saved_symbols[i] = seg.data[i + ATSC_DATA_SEGMENT_LENGTH - N_SAVED_SYMBOLS];} - - -inline static bool -last_regular_seg_p (const plinfo &pli) -{ - return pli.regular_seg_p () && (pli.segno () == ATSC_DSEGS_PER_FIELD - 1); -} - -void -atsc_field_sync_mux::forecast (int noutput_items, gr_vector_int &ninput_items_required) -{ - unsigned ninputs = ninput_items_required.size(); - for (unsigned i = 0; i < ninputs; i++) - ninput_items_required[i] = noutput_items; - -} - - -int -atsc_field_sync_mux::general_work (int noutput_items, - gr_vector_int &ninput_items, - gr_vector_const_void_star &input_items, - gr_vector_void_star &output_items) -{ - int in_length = ninput_items[0]; - const atsc_data_segment *in = (const atsc_data_segment *) input_items[0]; - atsc_data_segment *out = (atsc_data_segment *) output_items[0]; - - int index = 0; - int outdex = 0; - for (outdex = 0; outdex < noutput_items && index < in_length; outdex++){ - - assert (in[index].pli.regular_seg_p ()); - - if (!in[index].pli.first_regular_seg_p ()){ - out[outdex] = in[index]; // just copy in to out - - if (last_regular_seg_p (in[index].pli)) - save_last_symbols (d_saved_symbols, in[index]); - - index++; - } - else { // first_regular_seg_p - if (!d_already_output_field_sync){ - // write out field sync... - atsc_data_segment field_sync; - - if (in[index].pli.in_field1_p ()) - init_field_sync_1 (&field_sync, d_saved_symbols); - else - init_field_sync_2 (&field_sync, d_saved_symbols); - - // note that index doesn't advance in this branch - out[outdex] = field_sync; - d_already_output_field_sync = true; - } - else { - // already output field sync, now output first regular segment - out[outdex] = in[index]; - index++; - d_already_output_field_sync = false; - } - } - } - - this->consume_each(index); - return outdex; -} |