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/* -*- c++ -*- */
/*
* Copyright 2006 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 2, 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 <atsc_depad.h>
#include <gr_io_signature.h>
#include <atsc_types.h>
static const int INTR = ATSC_MPEG_PKT_LENGTH;
atsc_depad_sptr
atsc_make_depad()
{
return atsc_depad_sptr(new atsc_depad());
}
atsc_depad::atsc_depad()
: gr_sync_interpolator("atsc_depad",
gr_make_io_signature(1, 1, sizeof(atsc_mpeg_packet)),
gr_make_io_signature(1, 1, sizeof(unsigned char)),
INTR)
{
reset();
}
void
atsc_depad::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 / ATSC_MPEG_PKT_LENGTH;
}
int
atsc_depad::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const atsc_mpeg_packet *in = (const atsc_mpeg_packet *) input_items[0];
unsigned char *out = (unsigned char *) output_items[0];
// size with padding (256)
unsigned int ATSC_MPEG_PKT = sizeof(atsc_mpeg_packet);
unsigned int i;
for (i = 0; i < noutput_items/ATSC_MPEG_PKT + 1; i++){
for (int j = 0; j < ATSC_MPEG_PKT_LENGTH; j++)
out[i * ATSC_MPEG_PKT_LENGTH + j] = in[i * ATSC_MPEG_PKT].data[j];
}
return i * ATSC_MPEG_PKT_LENGTH;
}
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