diff --git a/trunk/src/kernel/srs_kernel_rtp.cpp b/trunk/src/kernel/srs_kernel_rtp.cpp
new file mode 100644
index 000000000..516ae89ff
--- /dev/null
+++ b/trunk/src/kernel/srs_kernel_rtp.cpp
@@ -0,0 +1,112 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013-2020 Winlin
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <srs_kernel_rtp.hpp>
+
+#include <fcntl.h>
+#include <sstream>
+using namespace std;
+
+#include <srs_kernel_log.hpp>
+#include <srs_kernel_error.hpp>
+#include <srs_kernel_buffer.hpp>
+#include <srs_kernel_utility.hpp>
+
+SrsRtpSharedPacket::SrsRtpSharedPacketPayload::SrsRtpSharedPacketPayload()
+{
+    payload = NULL;
+    size = 0;
+    shared_count = 0;
+}
+
+SrsRtpSharedPacket::SrsRtpSharedPacketPayload::~SrsRtpSharedPacketPayload()
+{
+    srs_freepa(payload);
+}
+
+SrsRtpSharedPacket::SrsRtpSharedPacket()
+{
+    payload_ptr = NULL;
+
+    payload = NULL;
+    size = 0;
+
+    timestamp = -1;
+    sequence = 0;
+    ssrc = 0;
+    payload_type = 0;
+}
+
+SrsRtpSharedPacket::~SrsRtpSharedPacket()
+{
+    if (payload_ptr) {
+        if (payload_ptr->shared_count == 0) {
+            srs_freep(payload_ptr);
+        } else {
+            --payload_ptr->shared_count;
+        }
+    }
+}
+
+srs_error_t SrsRtpSharedPacket::create(int64_t t, uint16_t seq, uint32_t sc, uint16_t pt, char* p, int s)
+{
+    srs_error_t err = srs_success;
+
+    if (size < 0) {
+        return srs_error_new(ERROR_RTP_PACKET_CREATE, "create packet size=%d", size);
+    }   
+
+    srs_assert(!payload_ptr);
+
+    timestamp = t;
+    sequence = seq;
+    ssrc = sc;
+    payload_type = pt;
+
+    payload_ptr = new SrsRtpSharedPacketPayload();
+    payload_ptr->payload = p;
+    payload_ptr->size = s;
+
+    payload = payload_ptr->payload;
+    size = payload_ptr->size;
+
+    return err;
+}
+
+SrsRtpSharedPacket* SrsRtpSharedPacket::copy()
+{
+    SrsRtpSharedPacket* copy = new SrsRtpSharedPacket();
+
+    copy->payload_ptr = payload_ptr;
+    payload_ptr->shared_count++;
+
+    copy->payload = payload;
+    copy->size = size;
+
+    copy->timestamp = timestamp;
+    copy->sequence = sequence;
+    copy->ssrc = ssrc;
+    copy->payload_type = payload_type;
+
+    return copy;
+}
diff --git a/trunk/src/kernel/srs_kernel_rtp.hpp b/trunk/src/kernel/srs_kernel_rtp.hpp
new file mode 100644
index 000000000..b348946ec
--- /dev/null
+++ b/trunk/src/kernel/srs_kernel_rtp.hpp
@@ -0,0 +1,62 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013-2020 Winlin
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef SRS_KERNEL_RTP_HPP
+#define SRS_KERNEL_RTP_HPP
+
+#include <srs_core.hpp>
+
+#include <string>
+
+class SrsRtpSharedPacket
+{
+private:
+     class SrsRtpSharedPacketPayload 
+     {   
+     public:
+         char* payload;
+         int size;
+         int shared_count;
+     public:
+         SrsRtpSharedPacketPayload();
+         virtual ~SrsRtpSharedPacketPayload();
+     };  
+private:
+     SrsRtpSharedPacketPayload* payload_ptr;
+public:
+     char* payload;
+     int size;
+public:
+     int64_t timestamp;
+     uint16_t sequence;
+     uint32_t ssrc;
+     uint16_t payload_type;
+public:
+    SrsRtpSharedPacket();
+    virtual ~SrsRtpSharedPacket();
+public:
+    srs_error_t create(int64_t t, uint16_t seq, uint32_t sc, uint16_t pt, char* p, int s);
+    SrsRtpSharedPacket* copy();
+};
+
+#endif