From afe371d39a054b2f2a9e5875b945584eec8a8141 Mon Sep 17 00:00:00 2001
From: 18045010223 <zjbassadmin@>
Date: 星期一, 28 七月 2025 09:09:05 +0800
Subject: [PATCH] 解决2019协议设备播放问题
---
src/main/java/cn/org/hentai/jtt1078/server/Jtt1078Decoder.java | 316 +++++++++++++++++++++++++++++++++++++++++++++++----
1 files changed, 287 insertions(+), 29 deletions(-)
diff --git a/src/main/java/cn/org/hentai/jtt1078/server/Jtt1078Decoder.java b/src/main/java/cn/org/hentai/jtt1078/server/Jtt1078Decoder.java
index 9c2344c..4c07b05 100644
--- a/src/main/java/cn/org/hentai/jtt1078/server/Jtt1078Decoder.java
+++ b/src/main/java/cn/org/hentai/jtt1078/server/Jtt1078Decoder.java
@@ -4,48 +4,306 @@
import cn.org.hentai.jtt1078.util.ByteUtils;
import cn.org.hentai.jtt1078.util.Packet;
-/**
- * Created by matrixy on 2019/4/9.
- */
-public class Jtt1078Decoder
-{
- //4096
- ByteHolder buffer = new ByteHolder(4096);
+import java.time.Instant;
+import java.time.ZoneOffset;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
- public void write(byte[] block)
- {
+/**
+ * JTT1078 Protocol Decoder
+ */
+
+public class Jtt1078Decoder {
+ private ByteHolder buffer = new ByteHolder(4096);
+ private int simLen = 0;
+ private String sim = "";
+ private byte channel = 0;
+ private static final byte[] HEAD1078 = {0x30, 0x31, 0x63, 0x64};
+
+ public void write(byte[] block) {
buffer.write(block);
}
- public void write(byte[] block, int startIndex, int length)
- {
+ public void write(byte[] block, int startIndex, int length) {
byte[] buff = new byte[length];
System.arraycopy(block, startIndex, buff, 0, length);
write(buff);
}
- public Packet decode()
- {
- if (this.buffer.size() < 30) return null;
+ public Packet decode() {
+ if (buffer.size() < 4) return null;
- if ((buffer.getInt(0) & 0x7fffffff) != 0x30316364)
- {
- String header = ByteUtils.toString(buffer.array(30));
- throw new RuntimeException("invalid protocol header: " + header);
+ // Check header
+ if (!Arrays.equals(buffer.array(4), HEAD1078)) {
+// log.warn("Invalid protocol header, expected:30316364, actual:{}",
+// ByteUtils.toHexString(buffer.array(4)));
+ buffer.clear();
+ return null;
}
- int lengthOffset = 28;
- int dataType = (this.buffer.get(15) >> 4) & 0x0f;
- // 閫忎紶鏁版嵁绫诲瀷锛�0100锛屾病鏈夊悗闈㈢殑鏃堕棿浠ュ強Last I Frame Interval鍜孡ast Frame Interval瀛楁
- if (dataType == 0x04) lengthOffset = 28 - 8 - 2 - 2;
- else if (dataType == 0x03) lengthOffset = 28 - 4;
- int bodyLength = this.buffer.getShort(lengthOffset);
+ // Try to determine protocol version if not set
+ if (simLen == 0) {
+ // Try version 16 (2013 protocol)
+ Packet packet = decodePacket(16);
+ if (packet != null) {
+ Analyze analyze = parse16(packet.getBytes());
+ sim = analyze.getSim();
+ channel = analyze.getCh();
+ simLen = 6;
+ System.out.printf("%s-%d device started output%n", sim, channel);
+ return packet;
+ }
- int packetLength = bodyLength + lengthOffset + 2;
+ // Try version 19 (2019 protocol)
+ packet = decodePacket(19);
+ if (packet != null) {
+ Analyze analyze = parse19(packet.getBytes());
+ sim = analyze.getSim();
+ channel = analyze.getCh();
+ simLen = 10;
+ System.out.printf("%s-%d device started output%n", sim, channel);
+ return packet;
+ }
- if (this.buffer.size() < packetLength) return null;
- byte[] block = new byte[packetLength];
- this.buffer.sliceInto(block, packetLength);
- return Packet.create(block);
+ return null;
+ } else {
+ return decodePacket(simLen == 6 ? 16 : 19);
+ }
+ }
+
+ private Packet decodePacket(int version) {
+ int dataTypeIndex = version == 16 ? 15 : 19;
+ if (buffer.size() < dataTypeIndex + 1) return null;
+
+ byte dataType = (byte) ((buffer.get(dataTypeIndex) >> 4) & 0x0F);
+ int dataLenIndex;
+
+ switch (dataType) {
+ case 3:
+ dataLenIndex = dataTypeIndex + 9;
+ break;
+ case 4:
+ dataLenIndex = dataTypeIndex + 1;
+ break;
+ default:
+ dataLenIndex = dataTypeIndex + 13;
+ }
+ //log.info("dataType:"+dataType);
+ if (buffer.size() < dataLenIndex + 2) return null;
+ int dataLen = buffer.getShort(dataLenIndex) & 0xFFFF;
+ int packetLength = dataLenIndex + 2 + dataLen;
+
+ if (buffer.size() < packetLength) return null;
+
+ // Check next packet header
+ if (buffer.size() >= packetLength + 4) {
+ byte[] nextHeader = new byte[4];
+ for (int i = 0; i < 4; i++) {
+ nextHeader[i] = buffer.get(packetLength + i);
+ }
+ if (!Arrays.equals(nextHeader, HEAD1078)) {
+ // log.warn("Invalid data type: {}", dataType);
+ buffer.clear();
+ return null;
+ }
+ }
+
+ byte[] packetData = new byte[packetLength];
+ buffer.sliceInto(packetData, packetLength);
+ // printPacketInfo(packetData, version);
+ return Packet.create(packetData);
+ }
+
+ private Analyze parse16(byte[] data) {
+ Analyze analyze = new Analyze();
+ analyze.setPt((byte) (data[5] & 0x7F));
+ analyze.setSn((short) (((data[6] & 0xFF) << 8) | (data[7] & 0xFF)));
+
+ StringBuilder simBuilder = new StringBuilder();
+ for (int i = 0; i < 6; i++) {
+ simBuilder.append(nextBcd(data, 8 + i));
+ }
+ analyze.setSim(simBuilder.toString());
+
+ analyze.setCh(data[14]);
+ analyze.setDt((byte) ((data[15] >> 4) & 0x0F));
+ analyze.setFi((byte) (data[15] & 0x0F));
+
+ int dataLenIndex;
+ switch (analyze.getDt()) {
+ case 3:
+ analyze.setTimestamp(setTimestamp(data, 16));
+ dataLenIndex = 24;
+ break;
+ case 4:
+ dataLenIndex = 16;
+ break;
+ default:
+ analyze.setTimestamp(setTimestamp(data, 16));
+ analyze.setLastIInterval((short) (((data[24] & 0xFF) << 8) | (data[25] & 0xFF)));
+ analyze.setLastInterval((short) (((data[26] & 0xFF) << 8) | (data[27] & 0xFF)));
+ dataLenIndex = 28;
+ }
+
+ analyze.setDataLen((short) (((data[dataLenIndex] & 0xFF) << 8) | (data[dataLenIndex + 1] & 0xFF)));
+ byte[] payload = new byte[analyze.getDataLen()];
+ System.arraycopy(data, dataLenIndex + 2, payload, 0, payload.length);
+ analyze.setData(payload);
+
+ return analyze;
+ }
+
+ private Analyze parse19(byte[] data) {
+ Analyze analyze = new Analyze();
+ analyze.setPt((byte) (data[5] & 0x7F));
+ analyze.setSn((short) (((data[6] & 0xFF) << 8) | (data[7] & 0xFF)));
+
+ StringBuilder simBuilder = new StringBuilder();
+ for (int i = 0; i < 10; i++) {
+ simBuilder.append(nextBcd(data, 8 + i));
+ }
+ analyze.setSim(simBuilder.toString());
+
+ analyze.setCh(data[18]);
+ analyze.setDt((byte) ((data[19] >> 4) & 0x0F));
+ analyze.setFi((byte) (data[19] & 0x0F));
+
+ int dataLenIndex;
+ switch (analyze.getDt()) {
+ case 3:
+ analyze.setTimestamp(setTimestamp(data, 20));
+ dataLenIndex = 28;
+ break;
+ case 4:
+ dataLenIndex = 20;
+ break;
+ default:
+ analyze.setTimestamp(setTimestamp(data, 20));
+ analyze.setLastIInterval((short) (((data[28] & 0xFF) << 8) | (data[29] & 0xFF)));
+ analyze.setLastInterval((short) (((data[30] & 0xFF) << 8) | (data[31] & 0xFF)));
+ dataLenIndex = 32;
+ }
+
+ analyze.setDataLen((short) (((data[dataLenIndex] & 0xFF) << 8) | (data[dataLenIndex + 1] & 0xFF)));
+ byte[] payload = new byte[analyze.getDataLen()];
+ System.arraycopy(data, dataLenIndex + 2, payload, 0, payload.length);
+ analyze.setData(payload);
+
+ return analyze;
+ }
+
+ private long setTimestamp(byte[] data, int offset) {
+ long timestamp = 0;
+ for (int i = 0; i < 8; i++) {
+ timestamp = (timestamp << 8) | (data[offset + i] & 0xFF);
+ }
+ return timestamp;
+ }
+
+ private String nextBcd(byte[] data, int offset) {
+ byte val = data[offset];
+ int ch1 = (val >> 4) & 0x0F;
+ int ch2 = val & 0x0F;
+ return String.format("%d%d", ch1, ch2);
+ }
+
+ private void printPacketInfo(byte[] packet, int version) {
+ System.out.println("\n=== JTT1078 " + (version == 16 ? "2013" : "2019") + " Protocol Packet ===");
+ System.out.println("Header: " + ByteUtils.toHexString(packet, 0, 4));
+
+ Analyze analyze = version == 16 ? parse16(packet) : parse19(packet);
+ System.out.println("Payload Type: " + analyze.getPt());
+ System.out.println("Sequence Number: " + analyze.getSn());
+ System.out.println("SIM: " + analyze.getSim());
+ System.out.println("Channel: " + analyze.getCh());
+ System.out.println("Data Type: " + getDataTypeDescription(analyze.getDt()));
+ System.out.println("Frame Info: " + getFrameInfoDescription(analyze.getFi()));
+
+ if (analyze.getTimestamp() != 0) {
+ Instant instant = Instant.ofEpochMilli(analyze.getTimestamp());
+ ZonedDateTime beijingTime = instant.atZone(ZoneOffset.ofHours(8));
+ DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+ System.out.println("Timestamp: " + formatter.format(beijingTime));
+ }
+
+ if (analyze.getLastIInterval() != 0) {
+ System.out.println("Last I Frame Interval: " + analyze.getLastIInterval());
+ }
+ if (analyze.getLastInterval() != 0) {
+ System.out.println("Last Frame Interval: " + analyze.getLastInterval());
+ }
+
+ System.out.println("Data Length: " + analyze.getDataLen());
+ System.out.println("=================================\n");
+ }
+
+ private String getDataTypeDescription(int dataType) {
+ switch (dataType) {
+ case 0: return "Video I Frame";
+ case 1: return "Video P Frame";
+ case 2: return "Video B Frame";
+ case 3: return "Audio Frame";
+ case 4: return "Transparent Data";
+ default: return "Unknown (" + dataType + ")";
+ }
+ }
+
+ private String getFrameInfoDescription(int fi) {
+ switch (fi) {
+ case 0: return "Atomic Packet";
+ case 1: return "First Packet";
+ case 2: return "Last Packet";
+ case 3: return "Middle Packet";
+ default: return "Unknown (" + fi + ")";
+ }
}
}
+
+class Analyze {
+ private byte pt;
+ private short sn;
+ private String sim;
+ private byte ch;
+ private byte dt;
+ private byte fi;
+ private long timestamp;
+ private short lastIInterval;
+ private short lastInterval;
+ private short dataLen;
+ private byte[] data;
+
+ // Getters and setters
+ public byte getPt() { return pt; }
+ public void setPt(byte pt) { this.pt = pt; }
+
+ public short getSn() { return sn; }
+ public void setSn(short sn) { this.sn = sn; }
+
+ public String getSim() { return sim; }
+ public void setSim(String sim) { this.sim = sim; }
+
+ public byte getCh() { return ch; }
+ public void setCh(byte ch) { this.ch = ch; }
+
+ public byte getDt() { return dt; }
+ public void setDt(byte dt) { this.dt = dt; }
+
+ public byte getFi() { return fi; }
+ public void setFi(byte fi) { this.fi = fi; }
+
+ public long getTimestamp() { return timestamp; }
+ public void setTimestamp(long timestamp) { this.timestamp = timestamp; }
+
+ public short getLastIInterval() { return lastIInterval; }
+ public void setLastIInterval(short lastIInterval) { this.lastIInterval = lastIInterval; }
+
+ public short getLastInterval() { return lastInterval; }
+ public void setLastInterval(short lastInterval) { this.lastInterval = lastInterval; }
+
+ public short getDataLen() { return dataLen; }
+ public void setDataLen(short dataLen) { this.dataLen = dataLen; }
+
+ public byte[] getData() { return data; }
+ public void setData(byte[] data) { this.data = data; }
+}
\ No newline at end of file
--
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