for #250, refine parse pes packet, remove the clear method.

@@ -415,10 +415,15 @@ SrsTsChannel::~SrsTsChannel()
     srs_freep(msg);
 }
 
-SrsTsMessage::SrsTsMessage()
+SrsTsMessage::SrsTsMessage(SrsTsChannel* c, SrsTsPacket* p)
 {
-    payload = NULL;
-    clear();
+    channel = c;
+    packet = p;
+
+    dts = pts = 0;
+    continuity_counter = 0;
+    PES_packet_length = 0;
+    payload = new SrsSimpleBuffer();
 }
 
 SrsTsMessage::~SrsTsMessage()
@@ -469,15 +474,6 @@ bool SrsTsMessage::fresh()
     return payload->length() == 0;
 }
 
-void SrsTsMessage::clear()
-{
-    dts = pts = 0;
-    continuity_counter = 0;
-    PES_packet_length = 0;
-    srs_freep(payload);
-    payload = new SrsSimpleBuffer();
-}
-
 ISrsTsHandler::ISrsTsHandler()
 {
 }
@@ -941,7 +937,7 @@ int SrsTsPayloadPES::decode(SrsStream* stream, SrsTsMessage** ppmsg)
     // init msg.
     SrsTsMessage* msg = channel->msg;
     if (!msg) {
-        msg = new SrsTsMessage();
+        msg = new SrsTsMessage(channel, packet);
         channel->msg = msg;
     }
 
@@ -967,7 +963,8 @@ int SrsTsPayloadPES::decode(SrsStream* stream, SrsTsMessage** ppmsg)
 
         // reparse current msg.
         stream->skip(stream->pos() * -1);
-        msg->clear();
+        srs_freep(msg);
+        channel->msg = NULL;
         return ERROR_SUCCESS;
     }
 
@@ -991,7 +988,8 @@ int SrsTsPayloadPES::decode(SrsStream* stream, SrsTsMessage** ppmsg)
 
             // reparse current msg.
             stream->skip(stream->pos() * -1);
-            msg->clear();
+            srs_freep(msg);
+            channel->msg = NULL;
             return ERROR_SUCCESS;
         }
     }
@@ -1005,7 +1003,6 @@ int SrsTsPayloadPES::decode(SrsStream* stream, SrsTsMessage** ppmsg)
 
         // reparse current msg.
         stream->skip(stream->pos() * -1);
-
         return ret;
     }
 

@@ -46,6 +46,7 @@ class SrsSimpleBuffer;
 class SrsTsAdaptationField;
 class SrsTsPayload;
 class SrsTsMessage;
+class SrsTsPacket;
 
 // Transport Stream packets are 188 bytes in length.
 #define SRS_TS_PACKET_SIZE          188
@@ -192,6 +193,9 @@ struct SrsTsChannel
 */
 class SrsTsMessage
 {
+private:
+    SrsTsChannel* channel;
+    SrsTsPacket* packet;
 public:
     int64_t dts;
     int64_t pts;
@@ -199,7 +203,7 @@ public:
     u_int8_t continuity_counter;
     SrsSimpleBuffer* payload;
 public:
-    SrsTsMessage();
+    SrsTsMessage(SrsTsChannel* c, SrsTsPacket* p);
     virtual ~SrsTsMessage();
 public:
     /**
@@ -219,10 +223,6 @@ public:
     * whether the message is fresh.
     */
     virtual bool fresh();
-    /**
-    * clear current message.
-    */
-    virtual void clear();
 };
 
 /**