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Diffstat (limited to 'gr-atsc/src/lib/GrAtscFieldSyncMux.cc')
| -rw-r--r-- | gr-atsc/src/lib/GrAtscFieldSyncMux.cc | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/gr-atsc/src/lib/GrAtscFieldSyncMux.cc b/gr-atsc/src/lib/GrAtscFieldSyncMux.cc deleted file mode 100644 index 7ebab72ad..000000000 --- a/gr-atsc/src/lib/GrAtscFieldSyncMux.cc +++ /dev/null @@ -1,246 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2002 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. - */ - -#include <GrAtscFieldSyncMux.h> -#include <atsci_pnXXX.h> - - -// typedefs for fundamental i/o types - -typedef atsc_data_segment iType; -typedef atsc_data_segment oType; - -static const int NUMBER_OF_OUTPUTS = 1; // # of output streams (almost always one) - -static const int N_SAVED_SYMBOLS = GrAtscFieldSyncMux::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); -} - - -GrAtscFieldSyncMux::GrAtscFieldSyncMux () - : VrHistoryProc<iType,oType> (NUMBER_OF_OUTPUTS), - d_current_index (0), d_already_output_field_sync (false) -{ - // 1 + number of extra input elements at which we look. This is - // used by the superclass's forecast routine to get us the correct - // range on our inputs. - history = 1; - - // any other init here. -} - -GrAtscFieldSyncMux::~GrAtscFieldSyncMux () -{ - // Anything that isn't automatically cleaned up... -} - -void -GrAtscFieldSyncMux::pre_initialize () -{ - // we jack our output sampling frequency up to account for inserted field syncs - setSamplingFrequency (getInputSamplingFrequencyN (0) * 313./312.); -} - -/* - * we need a non-standard version of forecast because our output isn't - * exactly 1:1 with our input. - */ - -int -GrAtscFieldSyncMux::forecast (VrSampleRange output, VrSampleRange inputs[]) -{ - for(unsigned int i = 0; i < numberInputs; i++) { - inputs[i].index = d_current_index; - inputs[i].size = output.size; - } - return 0; -} - -/* - * This is the real work horse. In general this interface can handle - * multiple streams of input and output, but we almost always - * use a single input and output stream. - */ -int -GrAtscFieldSyncMux::work (VrSampleRange output, void *ao[], - VrSampleRange inputs[], void *ai[]) -{ - // If we have state that persists across invocations (e.g., we have - // instance variables that we modify), we must use the sync method - // to indicate to the scheduler that our output must be computed in - // order. This doesn't keep other things from being run in - // parallel, it just means that at any given time, there is only a - // single thread working this code, and that the scheduler will - // ensure that we are asked to produce output that is contiguous and - // that will be presented to us in order of increasing time. - - // We have state, hence we must use sync. - - sync (output.index); - - // construct some nicer i/o pointers to work with. - - iType *in = ((iType **) ai)[0]; - oType *out = ((oType **) ao)[0]; - - - // We must produce output.size units of output. - - unsigned int index = 0; - for (unsigned int outdex = 0; outdex < output.size; 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; - } - } - } - - d_current_index += index; - - // Return the number of units we produced. - // Note that for all intents and purposes, it is an error to - // produce less than you are asked for. - - return output.size; -} |