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/*****************************************************************************
* decode_pat.c: PAT decoder example
*----------------------------------------------------------------------------
* Copyright (C) 2001-2011 VideoLAN
* $Id$
*
* Authors: Arnaud de Bossoreille de Ribou <bozo@via.ecp.fr>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*----------------------------------------------------------------------------
*
*****************************************************************************/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#if defined(HAVE_INTTYPES_H)
#include <inttypes.h>
#elif defined(HAVE_STDINT_H)
#include <stdint.h>
#endif
/* The libdvbpsi distribution defines DVBPSI_DIST */
#ifdef DVBPSI_DIST
#include "../src/dvbpsi.h"
#include "../src/psi.h"
#include "../src/tables/pat.h"
#else
#include <dvbpsi/dvbpsi.h>
#include <dvbpsi/psi.h>
#include <dvbpsi/pat.h>
#endif
/*****************************************************************************
* ReadPacket
*****************************************************************************/
static bool ReadPacket(int i_fd, uint8_t* p_dst)
{
int i = 187;
int i_rc = 1;
p_dst[0] = 0;
while((p_dst[0] != 0x47) && (i_rc > 0))
{
i_rc = read(i_fd, p_dst, 1);
}
while((i != 0) && (i_rc > 0))
{
i_rc = read(i_fd, p_dst + 188 - i, i);
if(i_rc >= 0)
i -= i_rc;
}
return (i == 0) ? true : false;
}
/*****************************************************************************
* DumpPAT
*****************************************************************************/
static void DumpPAT(void* p_zero, dvbpsi_pat_t* p_pat)
{
dvbpsi_pat_program_t* p_program = p_pat->p_first_program;
printf( "\n");
printf( "New PAT\n");
printf( " transport_stream_id : %d\n", p_pat->i_ts_id);
printf( " version_number : %d\n", p_pat->i_version);
printf( " | program_number @ [NIT|PMT]_PID\n");
while(p_program)
{
printf(" | %14d @ 0x%x (%d)\n",
p_program->i_number, p_program->i_pid, p_program->i_pid);
p_program = p_program->p_next;
}
printf( " active : %d\n", p_pat->b_current_next);
dvbpsi_pat_delete(p_pat);
}
static void message(dvbpsi_t *handle, const dvbpsi_msg_level_t level, const char* msg)
{
switch(level)
{
case DVBPSI_MSG_ERROR: fprintf(stderr, "Error: "); break;
case DVBPSI_MSG_WARN: fprintf(stderr, "Warning: "); break;
case DVBPSI_MSG_DEBUG: fprintf(stderr, "Debug: "); break;
default: /* do nothing */
return;
}
fprintf(stderr, "%s\n", msg);
}
/*****************************************************************************
* main
*****************************************************************************/
int main(int i_argc, char* pa_argv[])
{
int i_fd;
uint8_t data[188];
dvbpsi_t *p_dvbpsi;
bool b_ok;
if (i_argc != 2)
return 1;
i_fd = open(pa_argv[1], 0);
if (i_fd < 0)
return 1;
p_dvbpsi = dvbpsi_new(&message, DVBPSI_MSG_DEBUG);
if (p_dvbpsi == NULL)
goto out;
if (!dvbpsi_pat_attach(p_dvbpsi, DumpPAT, NULL))
goto out;
b_ok = ReadPacket(i_fd, data);
while(b_ok)
{
uint16_t i_pid = ((uint16_t)(data[1] & 0x1f) << 8) + data[2];
if(i_pid == 0x0)
dvbpsi_packet_push(p_dvbpsi, data);
b_ok = ReadPacket(i_fd, data);
}
out:
if (p_dvbpsi)
{
dvbpsi_pat_detach(p_dvbpsi);
dvbpsi_delete(p_dvbpsi);
}
close(i_fd);
return 0;
}
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