for #250, use udp packet handler.

@@ -39,6 +39,14 @@ using namespace std;
 
 #ifdef SRS_AUTO_STREAM_CASTER
 
+ISrsUdpHandler::ISrsUdpHandler()
+{
+}
+
+ISrsUdpHandler::~ISrsUdpHandler()
+{
+}
+
 SrsMpegtsOverUdp::SrsMpegtsOverUdp(SrsConfDirective* c)
 {
     stream = new SrsStream();
@@ -95,7 +103,7 @@ int SrsMpegtsOverUdp::on_udp_packet(sockaddr_in* from, char* buf, int nb_buf)
         }
 
         // process each ts packet
-        if ((ret = on_ts_packet(stream)) != ERROR_SUCCESS) {
+        if ((ret = context->decode(stream, this)) != ERROR_SUCCESS) {
             srs_warn("mpegts: ignore parse ts packet failed. ret=%d", ret);
             continue;
         }
@@ -111,18 +119,6 @@ int SrsMpegtsOverUdp::on_udp_packet(sockaddr_in* from, char* buf, int nb_buf)
     return ret;
 }
 
-int SrsMpegtsOverUdp::on_ts_packet(SrsStream* stream)
-{
-    int ret = ERROR_SUCCESS;
-
-    if ((ret = context->decode(stream, this)) != ERROR_SUCCESS) {
-        srs_error("mpegts: decode ts packet failed. ret=%d", ret);
-        return ret;
-    }
-
-    return ret;
-}
-
 int SrsMpegtsOverUdp::on_ts_message(SrsTsMessage* msg)
 {
     int ret = ERROR_SUCCESS;

@@ -43,34 +43,43 @@ class SrsSimpleBuffer;
 #include <srs_kernel_ts.hpp>
 
 /**
-* the mpegts over udp stream caster.
+* the udp packet handler.
 */
-class SrsMpegtsOverUdp : public ISrsTsHandler
+class ISrsUdpHandler
 {
-private:
-    SrsStream* stream;
-    SrsTsContext* context;
-    SrsSimpleBuffer* buffer;
-    std::string output;
 public:
-    SrsMpegtsOverUdp(SrsConfDirective* c);
-    virtual ~SrsMpegtsOverUdp();
+    ISrsUdpHandler();
+    virtual ~ISrsUdpHandler();
 public:
     /**
     * when udp listener got a udp packet, notice server to process it.
-    * @param type, the client type, used to create concrete connection, 
+    * @param type, the client type, used to create concrete connection,
     *       for instance RTMP connection to serve client.
     * @param from, the udp packet from address.
     * @param buf, the udp packet bytes, user should copy if need to use.
     * @param nb_buf, the size of udp packet bytes.
     * @remark user should never use the buf, for it's a shared memory bytes.
     */
-    virtual int on_udp_packet(sockaddr_in* from, char* buf, int nb_buf);
+    virtual int on_udp_packet(sockaddr_in* from, char* buf, int nb_buf) = 0;
+};
+
+/**
+* the mpegts over udp stream caster.
+*/
+class SrsMpegtsOverUdp : virtual public ISrsTsHandler
+    , virtual public ISrsUdpHandler
+{
 private:
-    /**
-    * the stream contains the ts packet to parse.
-    */
-    virtual int on_ts_packet(SrsStream* stream);
+    SrsStream* stream;
+    SrsTsContext* context;
+    SrsSimpleBuffer* buffer;
+    std::string output;
+public:
+    SrsMpegtsOverUdp(SrsConfDirective* c);
+    virtual ~SrsMpegtsOverUdp();
+// interface ISrsUdpHandler
+public:
+    virtual int on_udp_packet(sockaddr_in* from, char* buf, int nb_buf);
 // interface ISrsTsHandler
 public:
     virtual int on_ts_message(SrsTsMessage* msg);

@@ -45,9 +45,7 @@ class SrsIngester;
 class SrsHttpHeartbeat;
 class SrsKbps;
 class SrsConfDirective;
-#ifdef SRS_AUTO_STREAM_CASTER
-class SrsMpegtsOverUdp;
-#endif
+class ISrsUdpHandler;
 
 // listener type for server to identify the connection,
 // that is, use different type to process the connection.
@@ -96,7 +94,7 @@ class SrsUdpListener : public SrsListener
 private:
     char* buf;
     int nb_buf;
-    SrsMpegtsOverUdp* caster;
+    ISrsUdpHandler* caster;
 public:
     SrsUdpListener(SrsServer* server, SrsListenerType type, SrsConfDirective* c);
     virtual ~SrsUdpListener();