3 * Copyright 2006 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
27 #include <atsc_depad.h>
28 #include <gr_io_signature.h>
29 #include <atsc_types.h>
31 static const int INTR = ATSC_MPEG_PKT_LENGTH;
36 return atsc_depad_sptr(new atsc_depad());
39 atsc_depad::atsc_depad()
40 : gr_sync_interpolator("atsc_depad",
41 gr_make_io_signature(1, 1, sizeof(atsc_mpeg_packet)),
42 gr_make_io_signature(1, 1, sizeof(unsigned char)),
49 atsc_depad::forecast (int noutput_items, gr_vector_int &ninput_items_required)
51 unsigned ninputs = ninput_items_required.size();
52 for (unsigned i = 0; i < ninputs; i++)
53 ninput_items_required[i] = noutput_items / ATSC_MPEG_PKT_LENGTH;
58 atsc_depad::work (int noutput_items,
59 gr_vector_const_void_star &input_items,
60 gr_vector_void_star &output_items)
62 const atsc_mpeg_packet *in = (const atsc_mpeg_packet *) input_items[0];
63 unsigned char *out = (unsigned char *) output_items[0];
65 // size with padding (256)
66 unsigned int ATSC_MPEG_PKT = sizeof(atsc_mpeg_packet);
69 for (i = 0; i < noutput_items/ATSC_MPEG_PKT + 1; i++){
70 for (int j = 0; j < ATSC_MPEG_PKT_LENGTH; j++)
71 out[i * ATSC_MPEG_PKT_LENGTH + j] = in[i * ATSC_MPEG_PKT].data[j];
75 return i * ATSC_MPEG_PKT_LENGTH;