1.Use std::move to initialize std::thread; 2.Fix thread cannot exit error

src/rtp/rtp_audio_sender.h

@@ -18,7 +18,7 @@
 class RtpAudioSender : public ThreadBase {
  public:
   RtpAudioSender();
-  ~RtpAudioSender();
+  virtual ~RtpAudioSender();
 
  public:
   void Enqueue(std::vector<RtpPacket> &rtp_packets);

src/rtp/rtp_data_sender.h

@@ -18,7 +18,7 @@
 class RtpDataSender : public ThreadBase {
  public:
   RtpDataSender();
-  ~RtpDataSender();
+  virtual ~RtpDataSender();
 
  public:
   void Enqueue(std::vector<RtpPacket> &rtp_packets);

src/rtp/rtp_statistics.h

@@ -6,7 +6,7 @@
 class RtpStatistics : public ThreadBase {
  public:
   RtpStatistics();
-  ~RtpStatistics();
+  virtual ~RtpStatistics();
 
  public:
   void UpdateSentBytes(uint32_t sent_bytes);

src/rtp/rtp_video_receiver.h

@@ -17,7 +17,7 @@
 class RtpVideoReceiver : public ThreadBase {
  public:
   RtpVideoReceiver();
-  ~RtpVideoReceiver();
+  virtual ~RtpVideoReceiver();
 
  public:
   void InsertRtpPacket(RtpPacket& rtp_packet);

src/rtp/rtp_video_sender.h

@@ -12,7 +12,7 @@
 class RtpVideoSender : public ThreadBase {
  public:
   RtpVideoSender();
-  ~RtpVideoSender();
+  virtual ~RtpVideoSender();
 
  public:
   void Enqueue(std::vector<RtpPacket> &rtp_packets);