From 9d26d56e297f7bdd147cb702a75d78584d7db6ec Mon Sep 17 00:00:00 2001 From: Anton Tananaev Date: Tue, 10 Jul 2018 22:17:59 +0300 Subject: Support Continental extended precision --- src/org/traccar/protocol/ContinentalProtocolDecoder.java | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) (limited to 'src') diff --git a/src/org/traccar/protocol/ContinentalProtocolDecoder.java b/src/org/traccar/protocol/ContinentalProtocolDecoder.java index 20134fc1f..b8f322dc6 100644 --- a/src/org/traccar/protocol/ContinentalProtocolDecoder.java +++ b/src/org/traccar/protocol/ContinentalProtocolDecoder.java @@ -37,6 +37,14 @@ public class ContinentalProtocolDecoder extends BaseProtocolDecoder { public static final int MSG_ACK = 0x06; public static final int MSG_NACK = 0x15; + private double readCoordinate(ByteBuf buf, boolean extended) { + long value = buf.readUnsignedInt(); + if (extended ? (value & 0x08000000) != 0 : (value & 0x00800000) != 0) { + value |= extended ? 0xF0000000 : 0xFF000000; + } + return (int) value / (extended ? 360000.0 : 3600.0); + } + @Override protected Object decode( Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { @@ -64,11 +72,9 @@ public class ContinentalProtocolDecoder extends BaseProtocolDecoder { position.setFixTime(new Date(buf.readUnsignedInt() * 1000L)); - buf.readUnsignedByte(); - position.setLatitude(buf.readMedium() / 3600.0); - - buf.readUnsignedByte(); - position.setLongitude(buf.readMedium() / 3600.0); + boolean extended = buf.getUnsignedByte(buf.readerIndex()) != 0; + position.setLatitude(readCoordinate(buf, extended)); + position.setLongitude(readCoordinate(buf, extended)); position.setCourse(buf.readUnsignedShort()); position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort())); -- cgit v1.2.3