/*
* @(#)VBI.java - carries various stuff
*
* Copyright (c) 2005 by dvb.matt, All Rights Reserved.
*
* This file is part of ProjectX, a free Java based demux utility.
* By the authors, ProjectX is intended for educational purposes only,
* as a non-commercial test project.
*
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
package net.sourceforge.dvb.projectx.parser;
import net.sourceforge.dvb.projectx.common.Common;
import net.sourceforge.dvb.projectx.common.Resource;
import net.sourceforge.dvb.projectx.common.Keys;
import net.sourceforge.dvb.projectx.video.Video;
public final class VBI extends Object {
private static long source_pts = 0;
private static String vps_str = "";
private static String vps_sound_mode[] = { "n/a", "mono", "stereo", "dual" };
private static byte[] wss = new byte[3];
/**
*
*/
private VBI()
{}
/**
*
*/
public static void reset()
{
source_pts = 0;
vps_str = "";
wss = new byte[3];
}
/**
*
*/
// mpg2 pes expected
public static void parsePES(byte[] pes_packet, int pes_packetoffset) throws ArrayIndexOutOfBoundsException
{
if (pes_packet[pes_packetoffset] != 0 || pes_packet[1 + pes_packetoffset] != 0 || pes_packet[2 + pes_packetoffset] != 1)
return;
int pes_id = 0xFF & pes_packet[3 + pes_packetoffset];
int pes_packetlength = (0xFF & pes_packet[4 + pes_packetoffset])<<8 | (0xFF & pes_packet[5 + pes_packetoffset]);
int pes_mpeg_flag = 0xC0 & pes_packet[6 + pes_packetoffset];
if (pes_mpeg_flag != 0x80 && pes_mpeg_flag != 0x40) // neither mpeg2 nor mpeg1
return;
int pes_extensionlength = 0xFF & pes_packet[8 + pes_packetoffset];
boolean pts_flag = (0x80 & pes_packet[7 + pes_packetoffset]) != 0;
source_pts = pts_flag ? CommonParsing.getPTSfromBytes(pes_packet, 9 + pes_packetoffset) : 0;
decodeVBI(pes_packet, 9 + pes_extensionlength + pes_packetoffset);
}
/**
*
*/
private static void decodeVBI(byte[] packet, int offs) throws ArrayIndexOutOfBoundsException
{
String str;
boolean wss_online = false;
/**
* 0x99..0x9B -> PES contains one or multiple VBI Data definitions
*/
if ((0xFC & packet[offs]) != 0x98 || (3 & packet[offs]) == 0)
return;
for (int i = offs + 1, data_unit_id, len; i < packet.length - 1; )
{
data_unit_id = 0xFF & packet[i++];
len = 0xFF & packet[i++];
/**
* VPS
*/
if (data_unit_id == 0xC3)
{
str = decodeVPS(packet, i);
if (str != null && !str.equals(vps_str))
{
vps_str = str;
Common.setMessage(Resource.getString("teletext.msg.vps", str) + " " + Common.formatTime_1(source_pts / 90));
}
}
/**
* WSS
*/
else if (data_unit_id == 0xC4)
{
str = decodeWSS(packet, i);
if (str != null)
{
wss_online = true;
if (str.length() > 0)
{
Common.setMessage("-> WSS Status - changed @ PTS " + Common.formatTime_1(source_pts / 90));
Common.setMessage(str);
}
else if (wss[2] == 0)
{
Common.setMessage("-> WSS Status - no change @ PTS " + Common.formatTime_1(source_pts / 90));
wss[2] = -2;
}
}
}
else if (data_unit_id == 0xFF)
{}
i += len;
}
if (!wss_online && wss[2] == -1)
{
wss[2] = 0;
Common.setMessage("-> WSS Status - offline @ PTS " + Common.formatTime_1(source_pts / 90));
}
}
/**
*
*/
public static String decodeVPS(byte[] packet, int offs)
{
if (!Common.getSettings().getBooleanProperty(Keys.KEY_MessagePanel_Msg6))
return null;
String vps_status = "";
if (packet.length - 1 < offs + 12)
return null;
int vps_data = (0x3F & packet[offs + 9])<<24 |
(0xFF & packet[offs + 10])<<16 |
(0xFF & packet[offs + 11])<<8 |
(0xFF & packet[offs + 12]);
switch (0x1F & vps_data>>>16)
{
case 0x1C:
vps_status = "Contin.";
break;
case 0x1D:
vps_status = "Pause ";
break;
case 0x1E:
vps_status = "Stop ";
break;
case 0x1F:
vps_status = "Timer ";
break;
default:
vps_status = "" + formatString(0x1F & (vps_data>>>25)) + "." +
formatString(0xF & (vps_data>>>21)) + ". " +
formatString(0x1F & (vps_data>>>16)) + ":" +
formatString(0x3F & (vps_data>>>10)) + " ";
}
vps_status += vps_sound_mode[(3 & packet[offs + 3]>>>6)] + " " +
Integer.toHexString(0xF & vps_data>>>6).toUpperCase() + " " +
Integer.toHexString(0x3F & vps_data).toUpperCase();
return vps_status;
}
/**
*
*/
private static String formatString(int value)
{
String str = "00" + String.valueOf(value);
return str.substring(str.length() - 2);
}
/**
*
*/
public static String decodeWSS(byte[] packet, int offs)
{
if (!Common.getSettings().getBooleanProperty(Keys.KEY_MessagePanel_Msg5))
return null;
if (packet.length - 1 < offs + 2)
return null;
if (packet[offs + 1] == wss[0] && packet[offs + 2] == wss[1])
return "";
System.arraycopy(packet, offs + 1, wss, 0, 2);
wss[2] = -1;
// read PAL-625line WSS
String str = getGroup1(wss);
str += getGroup2(wss);
str += getGroup3(wss);
str += getGroup4(wss);
return str;
}
/**
*
*/
private static String getGroup1(byte[] packet)
{
String str = "";
switch (0xF & packet[0]>>4)
{
case 1: // 0001 Biphase 01010110
str = " " + Resource.getString("wss.group_1.0001");
break;
case 8: // 1000 Biphase 10010101
str = " " + Resource.getString("wss.group_1.1000");
break;
case 4: // 0100 Biphase 01100101
str = " " + Resource.getString("wss.group_1.0100");
break;
case 0xD: // 1101 Biphase 10100110
str = " " + Resource.getString("wss.group_1.1101");
break;
case 2: // 0010 Biphase 01011001
str = " " + Resource.getString("wss.group_1.0010");
break;
case 7: // 0111 Biphase 01101010
str = " " + Resource.getString("wss.group_1.0111");
break;
case 0xE: // 1110 Biphase 10101001
str = " " + Resource.getString("wss.group_1.1110");
break;
default:
str = " " + Resource.getString("wss.group_1.error");
}
str += "\n";
return str;
}
/**
*
*/
private static String getGroup2(byte[] packet)
{
String str = "";
switch (1 & packet[0]>>3)
{
case 0: // 0 Biphase 01
str += " " + Resource.getString("wss.group_2.0.01");
break;
case 1: // 1 Biphase 10
str += " " + Resource.getString("wss.group_2.0.10");
}
str += ",";
switch (1 & packet[0]>>2)
{
case 0: // 0 Biphase 01
str += " " + Resource.getString("wss.group_2.1.01");
break;
case 1: // 1 Biphase 10
str += " " + Resource.getString("wss.group_2.1.10");
}
str += ",";
switch (1 & packet[0]>>1)
{
case 0: // 0 Biphase 01
str += " " + Resource.getString("wss.group_2.2.01");
break;
case 1: // 1 Biphase 10
str += " " + Resource.getString("wss.group_2.2.10");
}
str += ",";
switch (1 & packet[0])
{
case 0: // 0 Biphase 01
str += " " + Resource.getString("wss.group_2.3.01");
break;
case 1: // 1 Biphase 10
str += " " + Resource.getString("wss.group_2.3.10");
}
str += "\n";
return str;
}
/**
*
*/
private static String getGroup3(byte[] packet)
{
String str = "";
switch (1 & packet[1]>>7)
{
case 0: // 0 Biphase 01
str += " " + Resource.getString("wss.group_3.0.01");
break;
case 1: // 1 Biphase 10
str += " " + Resource.getString("wss.group_3.0.10");
}
str += ",";
switch (3 & packet[1]>>5)
{
case 0: // 00 Biphase 0101
str += " " + Resource.getString("wss.group_3.1.00");
break;
case 1: // 01 Biphase 0110
str += " " + Resource.getString("wss.group_3.1.01");
break;
case 2: // 10 Biphase 1001
str += " " + Resource.getString("wss.group_3.1.10");
break;
case 3: // 11 Biphase 1010
str += " " + Resource.getString("wss.group_3.1.11");
}
str += "\n";
return str;
}
/**
*
*/
private static String getGroup4(byte[] packet)
{
String str = "";
switch (1 & packet[1]>>4)
{
case 0: // 0 Biphase 01
str += " " + Resource.getString("wss.group_4.0.01");
break;
case 1: // 1 Biphase 10
str += " " + Resource.getString("wss.group_4.0.10");
}
str += ",";
switch (1 & packet[1]>>3)
{
case 0: // 0 Biphase 01
str += " " + Resource.getString("wss.group_4.1.01");
break;
case 1: // 1 Biphase 10
str += " " + Resource.getString("wss.group_4.1.10");
}
str += ",";
switch (1 & packet[1]>>2)
{
case 0: // 0 Biphase 01
str += " " + Resource.getString("wss.group_4.2.01");
break;
case 1: // 1 Biphase 10
str += " " + Resource.getString("wss.group_4.2.10");
}
return str;
}
}