diff --git a/api/source/mk_common.cpp b/api/source/mk_common.cpp
index 1c62eb02..cc6b7a71 100644
--- a/api/source/mk_common.cpp
+++ b/api/source/mk_common.cpp
@@ -39,13 +39,13 @@ static std::shared_ptr<RtpServer> rtpServer;
 #ifdef ENABLE_WEBRTC
 #include "../webrtc/WebRtcSession.h"
 #include "../webrtc/WebRtcTransport.h"
-static std::shared_ptr<UdpServer> rtcServer_udp;
-static std::shared_ptr<TcpServer> rtcServer_tcp;
+static UdpServer::Ptr rtcServer_udp;
+static TcpServer::Ptr rtcServer_tcp;
 #endif
 
 #if defined(ENABLE_SRT)
 #include "../srt/SrtSession.hpp"
-static std::shared_ptr<UdpServer> srtServer;
+static UdpServer::Ptr srtServer;
 #endif
 
 //////////////////////////environment init///////////////////////////
diff --git a/api/source/mk_media.cpp b/api/source/mk_media.cpp
index c6c97e4c..5a2df445 100755
--- a/api/source/mk_media.cpp
+++ b/api/source/mk_media.cpp
@@ -18,7 +18,7 @@ using namespace mediakit;
 
 class MediaHelper : public MediaSourceEvent , public std::enable_shared_from_this<MediaHelper> {
 public:
-    typedef std::shared_ptr<MediaHelper> Ptr;
+    using Ptr = std::shared_ptr<MediaHelper>;
     template<typename ...ArgsType>
     MediaHelper(ArgsType &&...args){
         _channel = std::make_shared<DevChannel>(std::forward<ArgsType>(args)...);
diff --git a/api/source/mk_player.cpp b/api/source/mk_player.cpp
index b73ed110..df128353 100755
--- a/api/source/mk_player.cpp
+++ b/api/source/mk_player.cpp
@@ -19,7 +19,7 @@ using namespace mediakit;
 
 class MediaPlayerForC : public std::enable_shared_from_this<MediaPlayerForC>{
 public:
-    typedef std::shared_ptr<MediaPlayerForC> Ptr;
+    using Ptr = std::shared_ptr<MediaPlayerForC>;
 
     MediaPlayerForC(){
         _player = std::make_shared<MediaPlayer>();
diff --git a/api/source/mk_tcp_private.h b/api/source/mk_tcp_private.h
index 053602dc..7bd3a939 100644
--- a/api/source/mk_tcp_private.h
+++ b/api/source/mk_tcp_private.h
@@ -17,7 +17,7 @@
 
 class TcpClientForC : public toolkit::TcpClient {
 public:
-    typedef std::shared_ptr<TcpClientForC> Ptr;
+    using Ptr = std::shared_ptr<TcpClientForC>;
     TcpClientForC(mk_tcp_client_events *events) ;
     ~TcpClientForC() override ;
     void onRecv(const toolkit::Buffer::Ptr &pBuf) override;
diff --git a/api/source/mk_thread.cpp b/api/source/mk_thread.cpp
index f3c06ff4..ae803ef0 100644
--- a/api/source/mk_thread.cpp
+++ b/api/source/mk_thread.cpp
@@ -63,7 +63,7 @@ API_EXPORT void API_CALL mk_sync_do(mk_thread ctx,on_mk_async cb, void *user_dat
 
 class TimerForC : public std::enable_shared_from_this<TimerForC>{
 public:
-    typedef std::shared_ptr<TimerForC> Ptr;
+    using Ptr = std::shared_ptr<TimerForC>;
 
     TimerForC(on_mk_timer cb, void *user_data){
         _cb = cb;
diff --git a/player/AudioSRC.h b/player/AudioSRC.h
index 3180f4e8..5cd3e6d3 100644
--- a/player/AudioSRC.h
+++ b/player/AudioSRC.h
@@ -41,7 +41,7 @@ public:
 //该类实现pcm的重采样
 class AudioSRC {
 public:
-    typedef std::shared_ptr<AudioSRC> Ptr;
+    using Ptr = std::shared_ptr<AudioSRC>;
     AudioSRC(AudioSRCDelegate *);
     virtual ~AudioSRC();
 
diff --git a/src/Common/MediaSink.h b/src/Common/MediaSink.h
index ffe0a5c8..fd8206b9 100644
--- a/src/Common/MediaSink.h
+++ b/src/Common/MediaSink.h
@@ -44,7 +44,7 @@ public:
 
 class MediaSinkInterface : public FrameWriterInterface, public TrackListener {
 public:
-    typedef std::shared_ptr<MediaSinkInterface> Ptr;
+    using Ptr = std::shared_ptr<MediaSinkInterface>;
 
     MediaSinkInterface() = default;
     ~MediaSinkInterface() override = default;
@@ -55,7 +55,7 @@ public:
  */
 class MuteAudioMaker : public FrameDispatcher {
 public:
-    typedef std::shared_ptr<MuteAudioMaker> Ptr;
+    using Ptr = std::shared_ptr<MuteAudioMaker>;
     MuteAudioMaker() = default;
     ~MuteAudioMaker() override = default;
     bool inputFrame(const Frame::Ptr &frame) override;
@@ -70,7 +70,7 @@ private:
  */
 class MediaSink : public MediaSinkInterface, public TrackSource{
 public:
-    typedef std::shared_ptr<MediaSink> Ptr;
+    using Ptr = std::shared_ptr<MediaSink>;
     MediaSink() = default;
     ~MediaSink() override = default;
 
diff --git a/src/Common/MultiMediaSourceMuxer.cpp b/src/Common/MultiMediaSourceMuxer.cpp
index c6985b17..bcac76b5 100644
--- a/src/Common/MultiMediaSourceMuxer.cpp
+++ b/src/Common/MultiMediaSourceMuxer.cpp
@@ -11,13 +11,6 @@
 #include <math.h>
 #include "Common/config.h"
 #include "MultiMediaSourceMuxer.h"
-#include "Rtp/RtpSender.h"
-#include "Record/HlsRecorder.h"
-#include "Record/HlsMediaSource.h"
-#include "Rtsp/RtspMediaSourceMuxer.h"
-#include "Rtmp/RtmpMediaSourceMuxer.h"
-#include "TS/TSMediaSourceMuxer.h"
-#include "FMP4/FMP4MediaSourceMuxer.h"
 
 using namespace std;
 using namespace toolkit;
diff --git a/src/Common/MultiMediaSourceMuxer.h b/src/Common/MultiMediaSourceMuxer.h
index 76ac0e8c..7bedef98 100644
--- a/src/Common/MultiMediaSourceMuxer.h
+++ b/src/Common/MultiMediaSourceMuxer.h
@@ -15,18 +15,19 @@
 #include "Common/MediaSource.h"
 #include "Common/MediaSink.h"
 #include "Record/Recorder.h"
-namespace mediakit {
-class HlsRecorder;
-class RtspMediaSourceMuxer;
-class RtmpMediaSourceMuxer;
-class TSMediaSourceMuxer;
-class FMP4MediaSourceMuxer;
-class RtpSender;
+#include "Rtp/RtpSender.h"
+#include "Record/HlsRecorder.h"
+#include "Record/HlsMediaSource.h"
+#include "Rtsp/RtspMediaSourceMuxer.h"
+#include "Rtmp/RtmpMediaSourceMuxer.h"
+#include "TS/TSMediaSourceMuxer.h"
+#include "FMP4/FMP4MediaSourceMuxer.h"
 
+namespace mediakit {
 
 class MultiMediaSourceMuxer : public MediaSourceEventInterceptor, public MediaSink, public std::enable_shared_from_this<MultiMediaSourceMuxer>{
 public:
-    typedef std::shared_ptr<MultiMediaSourceMuxer> Ptr;
+    using Ptr = std::shared_ptr<MultiMediaSourceMuxer>;
 
     class Listener {
     public:
@@ -161,17 +162,17 @@ private:
     Stamp _stamp[2];
     std::weak_ptr<Listener> _track_listener;
 #if defined(ENABLE_RTPPROXY)
-    std::unordered_map<std::string, std::shared_ptr<RtpSender>> _rtp_sender;
+    std::unordered_map<std::string, RtpSender::Ptr> _rtp_sender;
 #endif //ENABLE_RTPPROXY
 
 #if defined(ENABLE_MP4)
-    std::shared_ptr<FMP4MediaSourceMuxer> _fmp4;
+    FMP4MediaSourceMuxer::Ptr _fmp4;
 #endif
-    std::shared_ptr<RtmpMediaSourceMuxer> _rtmp;
-    std::shared_ptr<RtspMediaSourceMuxer> _rtsp;
-    std::shared_ptr<TSMediaSourceMuxer> _ts;
+    RtmpMediaSourceMuxer::Ptr _rtmp;
+    RtspMediaSourceMuxer::Ptr _rtsp;
+    TSMediaSourceMuxer::Ptr _ts;
     MediaSinkInterface::Ptr _mp4;
-    std::shared_ptr<HlsRecorder> _hls;
+    HlsRecorder::Ptr _hls;
     toolkit::EventPoller::Ptr _poller;
 
     //对象个数统计
diff --git a/src/Common/PacketCache.h b/src/Common/PacketCache.h
index c13273ba..fd9032a1 100644
--- a/src/Common/PacketCache.h
+++ b/src/Common/PacketCache.h
@@ -1,9 +1,19 @@
-#ifndef _SRC_PACKET_CACHE_H_
-#define _SRC_PACKET_CACHE_H_
+/*
+* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
+*
+* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
+*
+* Use of this source code is governed by MIT license that can be found in the
+* LICENSE file in the root of the source tree. All contributing project authors
+* may be found in the AUTHORS file in the root of the source tree.
+*/
+
+#ifndef ZLMEDIAKIT_PACKET_CACHE_H_
+#define ZLMEDIAKIT_PACKET_CACHE_H_
+
 #include "Common/config.h"
 #include "Util/List.h"
 
-#pragma once
 namespace mediakit {
 /// 缓存刷新策略类
 class FlushPolicy {
@@ -84,4 +94,5 @@ private:
     std::shared_ptr<packet_list> _cache;
 };
 }
-#endif
+
+#endif //ZLMEDIAKIT_PACKET_CACHE_H_
diff --git a/src/Extension/AACRtmp.h b/src/Extension/AACRtmp.h
index 41de8805..fd34c495 100644
--- a/src/Extension/AACRtmp.h
+++ b/src/Extension/AACRtmp.h
@@ -21,7 +21,7 @@ namespace mediakit{
  */
 class AACRtmpDecoder : public RtmpCodec{
 public:
-    typedef std::shared_ptr<AACRtmpDecoder> Ptr;
+    using Ptr = std::shared_ptr<AACRtmpDecoder>;
 
     AACRtmpDecoder() {}
     ~AACRtmpDecoder() {}
@@ -49,7 +49,7 @@ private:
  */
 class AACRtmpEncoder : public AACRtmpDecoder{
 public:
-    typedef std::shared_ptr<AACRtmpEncoder> Ptr;
+    using Ptr = std::shared_ptr<AACRtmpEncoder>;
 
     /**
      * 构造函数，track可以为空，此时则在inputFrame时输入adts头
diff --git a/src/Extension/AACRtp.h b/src/Extension/AACRtp.h
index 23f48691..fd9de2a9 100644
--- a/src/Extension/AACRtp.h
+++ b/src/Extension/AACRtp.h
@@ -19,7 +19,7 @@ namespace mediakit{
  */
 class AACRtpDecoder : public RtpCodec {
 public:
-    typedef std::shared_ptr<AACRtpDecoder> Ptr;
+    using Ptr = std::shared_ptr<AACRtpDecoder>;
 
     AACRtpDecoder(const Track::Ptr &track);
     ~AACRtpDecoder() {}
@@ -54,7 +54,7 @@ private:
  */
 class AACRtpEncoder : public AACRtpDecoder , public RtpInfo {
 public:
-    typedef std::shared_ptr<AACRtpEncoder> Ptr;
+    using Ptr = std::shared_ptr<AACRtpEncoder>;
 
     /**
      * @param ui32Ssrc ssrc
diff --git a/src/Extension/CommonRtmp.h b/src/Extension/CommonRtmp.h
index 22bdc39a..8c28238a 100644
--- a/src/Extension/CommonRtmp.h
+++ b/src/Extension/CommonRtmp.h
@@ -21,7 +21,7 @@ namespace mediakit{
  */
 class CommonRtmpDecoder : public RtmpCodec {
 public:
-    typedef std::shared_ptr<CommonRtmpDecoder> Ptr;
+    using Ptr = std::shared_ptr<CommonRtmpDecoder>;
 
     ~CommonRtmpDecoder() override {}
 
@@ -55,7 +55,7 @@ private:
  */
 class CommonRtmpEncoder : public CommonRtmpDecoder {
 public:
-    typedef std::shared_ptr<CommonRtmpEncoder> Ptr;
+    using Ptr = std::shared_ptr<CommonRtmpEncoder>;
 
     CommonRtmpEncoder(const Track::Ptr &track);
     ~CommonRtmpEncoder() override{}
diff --git a/src/Extension/CommonRtp.h b/src/Extension/CommonRtp.h
index cf6d34e5..7df29af8 100644
--- a/src/Extension/CommonRtp.h
+++ b/src/Extension/CommonRtp.h
@@ -21,7 +21,7 @@ namespace mediakit{
  */
 class CommonRtpDecoder : public RtpCodec {
 public:
-    typedef std::shared_ptr <CommonRtpDecoder> Ptr;
+    using Ptr = std::shared_ptr <CommonRtpDecoder>;
 
     ~CommonRtpDecoder() override {}
 
@@ -60,7 +60,7 @@ private:
  */
 class CommonRtpEncoder : public CommonRtpDecoder, public RtpInfo {
 public:
-    typedef std::shared_ptr <CommonRtpEncoder> Ptr;
+    using Ptr = std::shared_ptr <CommonRtpEncoder>;
 
     ~CommonRtpEncoder() override {}
 
diff --git a/src/Extension/Frame.h b/src/Extension/Frame.h
index 842eaad9..3be07e0d 100644
--- a/src/Extension/Frame.h
+++ b/src/Extension/Frame.h
@@ -80,7 +80,7 @@ TrackType getTrackType(CodecId codecId);
  */
 class CodecInfo {
 public:
-    typedef std::shared_ptr<CodecInfo> Ptr;
+    using Ptr = std::shared_ptr<CodecInfo>;
 
     CodecInfo() = default;
     virtual ~CodecInfo() = default;
@@ -226,7 +226,7 @@ protected:
 template <typename Parent>
 class FrameInternal : public Parent {
 public:
-    typedef std::shared_ptr<FrameInternal> Ptr;
+    using Ptr = std::shared_ptr<FrameInternal>;
     FrameInternal(const Frame::Ptr &parent_frame, char *ptr, size_t size, size_t prefix_size)
         : Parent(ptr, size, parent_frame->dts(), parent_frame->pts(), prefix_size) {
         _parent_frame = parent_frame;
@@ -246,7 +246,7 @@ private:
 template <typename Parent>
 class FrameTSInternal : public Parent {
 public:
-    typedef std::shared_ptr<FrameTSInternal> Ptr;
+    using Ptr = std::shared_ptr<FrameTSInternal>;
     FrameTSInternal(
         const Frame::Ptr &parent_frame, char *ptr, size_t size, size_t prefix_size, uint64_t dts, uint64_t pts)
         : Parent(ptr, size, dts, pts, prefix_size) {
@@ -263,7 +263,7 @@ private:
  */
 class FrameWriterInterface {
 public:
-    typedef std::shared_ptr<FrameWriterInterface> Ptr;
+    using Ptr = std::shared_ptr<FrameWriterInterface>;
     FrameWriterInterface() = default;
     virtual ~FrameWriterInterface() = default;
 
@@ -342,7 +342,7 @@ private:
  */
 class FrameFromPtr : public Frame {
 public:
-    typedef std::shared_ptr<FrameFromPtr> Ptr;
+    using Ptr = std::shared_ptr<FrameFromPtr>;
 
     FrameFromPtr(
         CodecId codec_id, char *ptr, size_t size, uint64_t dts, uint64_t pts = 0, size_t prefix_size = 0,
@@ -395,7 +395,7 @@ protected:
  */
 class FrameCacheAble : public FrameFromPtr {
 public:
-    typedef std::shared_ptr<FrameCacheAble> Ptr;
+    using Ptr = std::shared_ptr<FrameCacheAble>;
 
     FrameCacheAble(const Frame::Ptr &frame, bool force_key_frame = false) {
         if (frame->cacheAble()) {
diff --git a/src/Extension/H264Rtmp.h b/src/Extension/H264Rtmp.h
index c222047c..5849ba2a 100644
--- a/src/Extension/H264Rtmp.h
+++ b/src/Extension/H264Rtmp.h
@@ -22,7 +22,7 @@ namespace mediakit{
  */
 class H264RtmpDecoder : public RtmpCodec {
 public:
-    typedef std::shared_ptr<H264RtmpDecoder> Ptr;
+    using Ptr = std::shared_ptr<H264RtmpDecoder>;
 
     H264RtmpDecoder();
     ~H264RtmpDecoder() {}
@@ -52,7 +52,7 @@ protected:
  */
 class H264RtmpEncoder : public H264RtmpDecoder{
 public:
-    typedef std::shared_ptr<H264RtmpEncoder> Ptr;
+    using Ptr = std::shared_ptr<H264RtmpEncoder>;
 
     /**
      * 构造函数，track可以为空，此时则在inputFrame时输入sps pps
diff --git a/src/Extension/H264Rtp.h b/src/Extension/H264Rtp.h
index 53e993d6..77bca5d0 100644
--- a/src/Extension/H264Rtp.h
+++ b/src/Extension/H264Rtp.h
@@ -25,7 +25,7 @@ namespace mediakit{
  */
 class H264RtpDecoder : public RtpCodec{
 public:
-    typedef std::shared_ptr<H264RtpDecoder> Ptr;
+    using Ptr = std::shared_ptr<H264RtpDecoder>;
 
     H264RtpDecoder();
     ~H264RtpDecoder() {}
@@ -63,7 +63,7 @@ private:
  */
 class H264RtpEncoder : public H264RtpDecoder ,public RtpInfo{
 public:
-    typedef std::shared_ptr<H264RtpEncoder> Ptr;
+    using Ptr = std::shared_ptr<H264RtpEncoder>;
 
     /**
      * @param ssrc ssrc
diff --git a/src/Extension/H265Rtmp.h b/src/Extension/H265Rtmp.h
index 68973da3..593bb753 100644
--- a/src/Extension/H265Rtmp.h
+++ b/src/Extension/H265Rtmp.h
@@ -22,7 +22,7 @@ namespace mediakit{
  */
 class H265RtmpDecoder : public RtmpCodec {
 public:
-    typedef std::shared_ptr<H265RtmpDecoder> Ptr;
+    using Ptr = std::shared_ptr<H265RtmpDecoder>;
 
     H265RtmpDecoder();
     ~H265RtmpDecoder() {}
@@ -50,7 +50,7 @@ protected:
  */
 class H265RtmpEncoder : public H265RtmpDecoder{
 public:
-    typedef std::shared_ptr<H265RtmpEncoder> Ptr;
+    using Ptr = std::shared_ptr<H265RtmpEncoder>;
 
     /**
      * 构造函数，track可以为空，此时则在inputFrame时输入sps pps
diff --git a/src/Extension/H265Rtp.h b/src/Extension/H265Rtp.h
index 1cecfee0..113437fe 100644
--- a/src/Extension/H265Rtp.h
+++ b/src/Extension/H265Rtp.h
@@ -25,7 +25,7 @@ namespace mediakit{
  */
 class H265RtpDecoder : public RtpCodec {
 public:
-    typedef std::shared_ptr<H265RtpDecoder> Ptr;
+    using Ptr = std::shared_ptr<H265RtpDecoder>;
 
     H265RtpDecoder();
     ~H265RtpDecoder() {}
@@ -64,7 +64,7 @@ private:
  */
 class H265RtpEncoder : public H265RtpDecoder ,public RtpInfo{
 public:
-    typedef std::shared_ptr<H265RtpEncoder> Ptr;
+    using Ptr = std::shared_ptr<H265RtpEncoder>;
 
     /**
      * @param ui32Ssrc ssrc
diff --git a/src/Extension/Opus.h b/src/Extension/Opus.h
index 88b19a1a..08dea847 100644
--- a/src/Extension/Opus.h
+++ b/src/Extension/Opus.h
@@ -21,7 +21,7 @@ namespace mediakit{
  */
 class OpusTrack : public AudioTrackImp{
 public:
-    typedef std::shared_ptr<OpusTrack> Ptr;
+    using Ptr = std::shared_ptr<OpusTrack>;
     OpusTrack() : AudioTrackImp(CodecOpus,48000,2,16){}
 
 private:
diff --git a/src/Extension/Track.h b/src/Extension/Track.h
index 855b0f91..48c4c0fe 100644
--- a/src/Extension/Track.h
+++ b/src/Extension/Track.h
@@ -23,7 +23,7 @@ namespace mediakit{
  */
 class Track : public FrameDispatcher , public CodecInfo{
 public:
-    typedef std::shared_ptr<Track> Ptr;
+    using Ptr = std::shared_ptr<Track>;
     Track(){}
 
     virtual ~Track(){}
@@ -75,7 +75,7 @@ private:
  */
 class VideoTrack : public Track {
 public:
-    typedef std::shared_ptr<VideoTrack> Ptr;
+    using Ptr = std::shared_ptr<VideoTrack>;
 
     /**
      * 返回视频高度
@@ -98,7 +98,7 @@ public:
  */
 class AudioTrack : public Track {
 public:
-    typedef std::shared_ptr<AudioTrack> Ptr;
+    using Ptr = std::shared_ptr<AudioTrack>;
 
     /**
      * 返回音频采样率
@@ -118,7 +118,7 @@ public:
 
 class AudioTrackImp : public AudioTrack{
 public:
-    typedef std::shared_ptr<AudioTrackImp> Ptr;
+    using Ptr = std::shared_ptr<AudioTrackImp>;
 
     /**
      * 构造函数
diff --git a/src/Http/HlsPlayer.h b/src/Http/HlsPlayer.h
index 55c7d062..4970087a 100644
--- a/src/Http/HlsPlayer.h
+++ b/src/Http/HlsPlayer.h
@@ -111,7 +111,7 @@ private:
 
 class HlsPlayerImp : public PlayerImp<HlsPlayer, PlayerBase>, private TrackListener {
 public:
-    typedef std::shared_ptr<HlsPlayerImp> Ptr;
+    using Ptr = std::shared_ptr<HlsPlayerImp>;
     HlsPlayerImp(const toolkit::EventPoller::Ptr &poller = nullptr);
     ~HlsPlayerImp() override = default;
 
diff --git a/src/Http/HttpBody.cpp b/src/Http/HttpBody.cpp
index f619286d..6c63cc2e 100644
--- a/src/Http/HttpBody.cpp
+++ b/src/Http/HttpBody.cpp
@@ -183,7 +183,7 @@ int HttpFileBody::sendFile(int fd) {
 
 class BufferMmap : public Buffer {
 public:
-    typedef std::shared_ptr<BufferMmap> Ptr;
+    using Ptr = std::shared_ptr<BufferMmap>;
     BufferMmap(const std::shared_ptr<char> &map_addr, size_t offset, size_t size) {
         _map_addr = map_addr;
         _data = map_addr.get() + offset;
diff --git a/src/Http/HttpBody.h b/src/Http/HttpBody.h
index 301d4c8a..51052a8e 100644
--- a/src/Http/HttpBody.h
+++ b/src/Http/HttpBody.h
@@ -29,7 +29,7 @@ namespace mediakit {
  */
 class HttpBody : public std::enable_shared_from_this<HttpBody>{
 public:
-    typedef std::shared_ptr<HttpBody> Ptr;
+    using Ptr = std::shared_ptr<HttpBody>;
     HttpBody(){}
 
     virtual ~HttpBody(){}
@@ -73,7 +73,7 @@ public:
  */
 class HttpStringBody : public HttpBody{
 public:
-    typedef std::shared_ptr<HttpStringBody> Ptr;
+    using Ptr = std::shared_ptr<HttpStringBody>;
     HttpStringBody(std::string str);
     ~HttpStringBody() override = default;
 
@@ -90,7 +90,7 @@ private:
  */
 class HttpBufferBody : public HttpBody{
 public:
-    typedef std::shared_ptr<HttpBufferBody> Ptr;
+    using Ptr = std::shared_ptr<HttpBufferBody>;
     HttpBufferBody(toolkit::Buffer::Ptr buffer);
     ~HttpBufferBody() override = default;
 
@@ -106,7 +106,7 @@ private:
  */
 class HttpFileBody : public HttpBody {
 public:
-    typedef std::shared_ptr<HttpFileBody> Ptr;
+    using Ptr = std::shared_ptr<HttpFileBody>;
 
     /**
      * 构造函数
@@ -142,7 +142,7 @@ class HttpArgs;
  */
 class HttpMultiFormBody : public HttpBody {
 public:
-    typedef std::shared_ptr<HttpMultiFormBody> Ptr;
+    using Ptr = std::shared_ptr<HttpMultiFormBody>;
 
     /**
      * 构造函数
diff --git a/src/Http/HttpCookie.h b/src/Http/HttpCookie.h
index 728558d5..cf478f5c 100644
--- a/src/Http/HttpCookie.h
+++ b/src/Http/HttpCookie.h
@@ -25,7 +25,7 @@ namespace mediakit {
  */
 class HttpCookie {
 public:
-    typedef std::shared_ptr<HttpCookie> Ptr;
+    using Ptr = std::shared_ptr<HttpCookie>;
     friend class HttpCookieStorage;
     HttpCookie(){}
     ~HttpCookie(){}
diff --git a/src/Http/HttpFileManager.cpp b/src/Http/HttpFileManager.cpp
index 6a36cfe2..7e71186c 100644
--- a/src/Http/HttpFileManager.cpp
+++ b/src/Http/HttpFileManager.cpp
@@ -198,7 +198,7 @@ static bool emitHlsPlayed(const Parser &parser, const MediaInfo &media_info, con
 
 class SockInfoImp : public SockInfo{
 public:
-    typedef std::shared_ptr<SockInfoImp> Ptr;
+    using Ptr = std::shared_ptr<SockInfoImp>;
     SockInfoImp() = default;
     ~SockInfoImp() override = default;
 
diff --git a/src/Http/HttpSession.cpp b/src/Http/HttpSession.cpp
index fd59416b..1c7e79dc 100644
--- a/src/Http/HttpSession.cpp
+++ b/src/Http/HttpSession.cpp
@@ -439,7 +439,7 @@ static string dateStr() {
 class AsyncSenderData {
 public:
     friend class AsyncSender;
-    typedef std::shared_ptr<AsyncSenderData> Ptr;
+    using Ptr = std::shared_ptr<AsyncSenderData>;
     AsyncSenderData(const Session::Ptr &session, const HttpBody::Ptr &body, bool close_when_complete) {
         _session = dynamic_pointer_cast<HttpSession>(session);
         _body = body;
@@ -455,7 +455,7 @@ private:
 
 class AsyncSender {
 public:
-    typedef std::shared_ptr<AsyncSender> Ptr;
+    using Ptr = std::shared_ptr<AsyncSender>;
     static bool onSocketFlushed(const AsyncSenderData::Ptr &data) {
         if (data->_read_complete) {
             if (data->_close_when_complete) {
diff --git a/src/Http/WebSocketClient.h b/src/Http/WebSocketClient.h
index 69556344..c99ca7d6 100644
--- a/src/Http/WebSocketClient.h
+++ b/src/Http/WebSocketClient.h
@@ -70,7 +70,7 @@ private:
 template <typename ClientType,WebSocketHeader::Type DataType = WebSocketHeader::TEXT>
 class HttpWsClient : public HttpClientImp , public WebSocketSplitter{
 public:
-    typedef std::shared_ptr<HttpWsClient> Ptr;
+    using Ptr = std::shared_ptr<HttpWsClient>;
 
     HttpWsClient(const std::shared_ptr<ClientTypeImp<ClientType, DataType> > &delegate) : _weak_delegate(delegate),
                                                                                           _delegate(*delegate) {
@@ -361,7 +361,7 @@ private:
 template <typename ClientType,WebSocketHeader::Type DataType = WebSocketHeader::TEXT,bool useWSS = false >
 class WebSocketClient : public ClientTypeImp<ClientType,DataType>{
 public:
-    typedef std::shared_ptr<WebSocketClient> Ptr;
+    using Ptr = std::shared_ptr<WebSocketClient>;
 
     template<typename ...ArgsType>
     WebSocketClient(ArgsType &&...args) : ClientTypeImp<ClientType,DataType>(std::forward<ArgsType>(args)...){
diff --git a/src/Http/WebSocketSplitter.h b/src/Http/WebSocketSplitter.h
index 7e3738d6..ee29f447 100644
--- a/src/Http/WebSocketSplitter.h
+++ b/src/Http/WebSocketSplitter.h
@@ -24,7 +24,7 @@ namespace mediakit {
 
 class WebSocketHeader {
 public:
-    typedef std::shared_ptr<WebSocketHeader> Ptr;
+    using Ptr = std::shared_ptr<WebSocketHeader>;
     typedef enum {
         CONTINUATION = 0x0,
         TEXT = 0x1,
@@ -65,7 +65,7 @@ public:
 //websocket协议收到的字符串类型缓存，用户协议层获取该数据传输的方式
 class WebSocketBuffer : public toolkit::BufferString {
 public:
-    typedef std::shared_ptr<WebSocketBuffer> Ptr;
+    using Ptr = std::shared_ptr<WebSocketBuffer>;
 
     template<typename ...ARGS>
     WebSocketBuffer(WebSocketHeader::Type headType, bool fin, ARGS &&...args)
diff --git a/src/Player/PlayerProxy.h b/src/Player/PlayerProxy.h
index 5f142180..02cba77b 100644
--- a/src/Player/PlayerProxy.h
+++ b/src/Player/PlayerProxy.h
@@ -14,12 +14,13 @@
 #include <memory>
 #include "Common/MultiMediaSourceMuxer.h"
 #include "Player/MediaPlayer.h"
+#include "Util/TimeTicker.h"
 
 namespace mediakit {
 
 class PlayerProxy : public MediaPlayer, public MediaSourceEvent, public std::enable_shared_from_this<PlayerProxy> {
 public:
-    typedef std::shared_ptr<PlayerProxy> Ptr;
+    using Ptr = std::shared_ptr<PlayerProxy>;
 
     //如果retry_count<0,则一直重试播放；否则重试retry_count次数
     //默认一直重试
@@ -71,7 +72,7 @@ private:
     std::string _app;
     std::string _stream_id;
     std::string _pull_url;
-    std::shared_ptr<toolkit::Timer> _timer;
+    toolkit::Timer::Ptr _timer;
     std::function<void(const toolkit::SockException &ex)> _on_close;
     std::function<void(const toolkit::SockException &ex)> _on_play;
     MultiMediaSourceMuxer::Ptr _muxer;
diff --git a/src/Pusher/MediaPusher.h b/src/Pusher/MediaPusher.h
index 7ddd7d9a..52bd4ec3 100644
--- a/src/Pusher/MediaPusher.h
+++ b/src/Pusher/MediaPusher.h
@@ -19,7 +19,7 @@ namespace mediakit {
 
 class MediaPusher : public PusherImp<PusherBase,PusherBase> {
 public:
-    typedef std::shared_ptr<MediaPusher> Ptr;
+    using Ptr = std::shared_ptr<MediaPusher>;
 
     MediaPusher(const std::string &schema,
                 const std::string &vhost,
diff --git a/src/Pusher/PusherProxy.h b/src/Pusher/PusherProxy.h
index e8558021..bee32d63 100644
--- a/src/Pusher/PusherProxy.h
+++ b/src/Pusher/PusherProxy.h
@@ -18,7 +18,7 @@ namespace mediakit {
 
 class PusherProxy : public MediaPusher, public std::enable_shared_from_this<PusherProxy> {
 public:
-    typedef std::shared_ptr<PusherProxy> Ptr;
+    using Ptr = std::shared_ptr<PusherProxy>;
 
     // 如果retry_count<0,则一直重试播放；否则重试retry_count次数
     // 默认一直重试，创建此对象时候，需要外部保证MediaSource存在
diff --git a/src/Record/MP4Demuxer.h b/src/Record/MP4Demuxer.h
index 9114784c..220f143a 100644
--- a/src/Record/MP4Demuxer.h
+++ b/src/Record/MP4Demuxer.h
@@ -18,7 +18,7 @@ namespace mediakit {
 
 class MP4Demuxer : public TrackSource {
 public:
-    typedef std::shared_ptr<MP4Demuxer> Ptr;
+    using Ptr = std::shared_ptr<MP4Demuxer>;
 
     /**
      * 创建mp4解复用器
diff --git a/src/Record/MP4Muxer.h b/src/Record/MP4Muxer.h
index dcf10d5d..83b939f6 100644
--- a/src/Record/MP4Muxer.h
+++ b/src/Record/MP4Muxer.h
@@ -84,7 +84,7 @@ private:
 
 class MP4Muxer : public MP4MuxerInterface{
 public:
-    typedef std::shared_ptr<MP4Muxer> Ptr;
+    using Ptr = std::shared_ptr<MP4Muxer>;
 
     MP4Muxer() = default;
     ~MP4Muxer() override;
diff --git a/src/Record/MP4Recorder.h b/src/Record/MP4Recorder.h
index d40da7d2..69175238 100644
--- a/src/Record/MP4Recorder.h
+++ b/src/Record/MP4Recorder.h
@@ -15,6 +15,7 @@
 #include <memory>
 #include "Common/MediaSink.h"
 #include "Record/Recorder.h"
+#include "MP4Muxer.h"
 
 namespace mediakit {
 
@@ -60,7 +61,7 @@ private:
     std::string _full_path;
     std::string _full_path_tmp;
     RecordInfo _info;
-    std::shared_ptr<MP4Muxer> _muxer;
+    MP4Muxer::Ptr _muxer;
     std::list<Track::Ptr> _tracks;
     uint64_t _last_dts = 0;
 };
diff --git a/src/Rtmp/Rtmp.h b/src/Rtmp/Rtmp.h
index efbb2dea..3f01e088 100644
--- a/src/Rtmp/Rtmp.h
+++ b/src/Rtmp/Rtmp.h
@@ -205,7 +205,7 @@ private:
  */
 class Metadata : public CodecInfo{
 public:
-    typedef std::shared_ptr<Metadata> Ptr;
+    using Ptr = std::shared_ptr<Metadata>;
 
     Metadata():_metadata(AMF_OBJECT){}
     virtual ~Metadata(){}
@@ -223,7 +223,7 @@ protected:
 */
 class TitleMeta : public Metadata{
 public:
-    typedef std::shared_ptr<TitleMeta> Ptr;
+    using Ptr = std::shared_ptr<TitleMeta>;
 
     TitleMeta(float dur_sec = 0,
               size_t fileSize = 0,
@@ -236,7 +236,7 @@ public:
 
 class VideoMeta : public Metadata{
 public:
-    typedef std::shared_ptr<VideoMeta> Ptr;
+    using Ptr = std::shared_ptr<VideoMeta>;
 
     VideoMeta(const VideoTrack::Ptr &video);
     virtual ~VideoMeta(){}
@@ -250,7 +250,7 @@ private:
 
 class AudioMeta : public Metadata{
 public:
-    typedef std::shared_ptr<AudioMeta> Ptr;
+    using Ptr = std::shared_ptr<AudioMeta>;
 
     AudioMeta(const AudioTrack::Ptr &audio);
 
diff --git a/src/Rtmp/RtmpCodec.h b/src/Rtmp/RtmpCodec.h
index 620f830d..67c9ce92 100644
--- a/src/Rtmp/RtmpCodec.h
+++ b/src/Rtmp/RtmpCodec.h
@@ -55,7 +55,7 @@ protected:
 
 class RtmpCodec : public RtmpRing, public FrameDispatcher, public CodecInfo {
 public:
-    typedef std::shared_ptr<RtmpCodec> Ptr;
+    using Ptr = std::shared_ptr<RtmpCodec>;
     RtmpCodec() = default;
     ~RtmpCodec() override = default;
     virtual void makeConfigPacket() {};
diff --git a/src/Rtmp/RtmpDemuxer.h b/src/Rtmp/RtmpDemuxer.h
index 3b5df964..31b0ed2d 100644
--- a/src/Rtmp/RtmpDemuxer.h
+++ b/src/Rtmp/RtmpDemuxer.h
@@ -16,9 +16,10 @@
 #include "Rtmp/amf.h"
 #include "Rtmp/Rtmp.h"
 #include "Common/MediaSink.h"
+#include "RtmpCodec.h"
 
 namespace mediakit {
-class RtmpCodec;
+
 class RtmpDemuxer : public Demuxer {
 public:
     using Ptr = std::shared_ptr<RtmpDemuxer>;
@@ -52,8 +53,8 @@ private:
     float _duration = 0;
     AudioTrack::Ptr _audio_track;
     VideoTrack::Ptr _video_track;
-    std::shared_ptr<RtmpCodec> _audio_rtmp_decoder;
-    std::shared_ptr<RtmpCodec> _video_rtmp_decoder;
+    RtmpCodec::Ptr _audio_rtmp_decoder;
+    RtmpCodec::Ptr _video_rtmp_decoder;
 };
 
 } /* namespace mediakit */
diff --git a/src/Rtmp/RtmpMediaSourceImp.h b/src/Rtmp/RtmpMediaSourceImp.h
index 7bb1363f..c6382c8d 100644
--- a/src/Rtmp/RtmpMediaSourceImp.h
+++ b/src/Rtmp/RtmpMediaSourceImp.h
@@ -18,11 +18,12 @@
 #include <unordered_map>
 #include "amf.h"
 #include "Rtmp.h"
+#include "RtmpDemuxer.h"
 #include "RtmpMediaSource.h"
 #include "Common/MultiMediaSourceMuxer.h"
 
 namespace mediakit {
-class RtmpDemuxer;
+
 class RtmpMediaSourceImp final : public RtmpMediaSource, private TrackListener, public MultiMediaSourceMuxer::Listener {
 public:
     using Ptr = std::shared_ptr<RtmpMediaSourceImp>;
@@ -90,7 +91,7 @@ private:
     bool _recreate_metadata = false;
     ProtocolOption _option;
     AMFValue _metadata;
-    std::shared_ptr<RtmpDemuxer> _demuxer;
+    RtmpDemuxer::Ptr _demuxer;
     MultiMediaSourceMuxer::Ptr _muxer;
 
 };
diff --git a/src/Rtmp/RtmpMediaSourceMuxer.h b/src/Rtmp/RtmpMediaSourceMuxer.h
index 29a1e8d0..70f3fffe 100644
--- a/src/Rtmp/RtmpMediaSourceMuxer.h
+++ b/src/Rtmp/RtmpMediaSourceMuxer.h
@@ -19,7 +19,7 @@ namespace mediakit {
 class RtmpMediaSourceMuxer final : public RtmpMuxer, public MediaSourceEventInterceptor,
                                    public std::enable_shared_from_this<RtmpMediaSourceMuxer> {
 public:
-    typedef std::shared_ptr<RtmpMediaSourceMuxer> Ptr;
+    using Ptr = std::shared_ptr<RtmpMediaSourceMuxer>;
 
     RtmpMediaSourceMuxer(const std::string &vhost,
                          const std::string &strApp,
diff --git a/src/Rtmp/RtmpMuxer.h b/src/Rtmp/RtmpMuxer.h
index 73cacfb2..430166c2 100644
--- a/src/Rtmp/RtmpMuxer.h
+++ b/src/Rtmp/RtmpMuxer.h
@@ -20,7 +20,7 @@ namespace mediakit{
 
 class RtmpMuxer : public MediaSinkInterface {
 public:
-    typedef std::shared_ptr<RtmpMuxer> Ptr;
+    using Ptr = std::shared_ptr<RtmpMuxer>;
 
     /**
      * 构造函数
diff --git a/src/Rtmp/RtmpPlayer.h b/src/Rtmp/RtmpPlayer.h
index bedbf4c1..55e4c9c4 100644
--- a/src/Rtmp/RtmpPlayer.h
+++ b/src/Rtmp/RtmpPlayer.h
@@ -27,7 +27,7 @@ namespace mediakit {
 //实现了rtmp播放器协议部分的功能，及数据接收功能
 class RtmpPlayer : public PlayerBase, public toolkit::TcpClient, public RtmpProtocol {
 public:
-    typedef std::shared_ptr<RtmpPlayer> Ptr;
+    using Ptr = std::shared_ptr<RtmpPlayer>;
     RtmpPlayer(const toolkit::EventPoller::Ptr &poller);
     ~RtmpPlayer() override;
 
diff --git a/src/Rtmp/RtmpPlayerImp.h b/src/Rtmp/RtmpPlayerImp.h
index 21c23110..c09d460b 100644
--- a/src/Rtmp/RtmpPlayerImp.h
+++ b/src/Rtmp/RtmpPlayerImp.h
@@ -14,10 +14,11 @@
 #include <memory>
 #include <functional>
 #include "RtmpPlayer.h"
+#include "RtmpDemuxer.h"
 #include "RtmpMediaSource.h"
 
 namespace mediakit {
-class RtmpDemuxer;
+
 class RtmpPlayerImp: public PlayerImp<RtmpPlayer,PlayerBase>, private TrackListener {
 public:
     using Ptr = std::shared_ptr<RtmpPlayerImp>;
@@ -76,7 +77,7 @@ private:
 
 private:
     bool _wait_track_ready = true;
-    std::shared_ptr<RtmpDemuxer> _demuxer;
+    RtmpDemuxer::Ptr _demuxer;
     RtmpMediaSource::Ptr _rtmp_src;
 };
 
diff --git a/src/Rtmp/RtmpPusher.h b/src/Rtmp/RtmpPusher.h
index 6cdfebea..bd41fd75 100644
--- a/src/Rtmp/RtmpPusher.h
+++ b/src/Rtmp/RtmpPusher.h
@@ -20,7 +20,7 @@ namespace mediakit {
 
 class RtmpPusher : public RtmpProtocol, public toolkit::TcpClient, public PusherBase {
 public:
-    typedef std::shared_ptr<RtmpPusher> Ptr;
+    using Ptr = std::shared_ptr<RtmpPusher>;
     RtmpPusher(const toolkit::EventPoller::Ptr &poller,const RtmpMediaSource::Ptr &src);
     ~RtmpPusher() override;
 
diff --git a/src/Rtp/Decoder.h b/src/Rtp/Decoder.h
index a51e4494..c6f8aacf 100644
--- a/src/Rtp/Decoder.h
+++ b/src/Rtp/Decoder.h
@@ -20,9 +20,9 @@ namespace mediakit {
 
 class Decoder {
 public:
-    typedef std::shared_ptr<Decoder> Ptr;
-    typedef std::function<void(int stream, int codecid, int flags, int64_t pts, int64_t dts, const void *data, size_t bytes)> onDecode;
-    typedef std::function<void(int stream, int codecid, const void *extra, size_t bytes, int finish)> onStream;
+    using Ptr = std::shared_ptr<Decoder>;
+    using onDecode = std::function<void(int stream, int codecid, int flags, int64_t pts, int64_t dts, const void *data, size_t bytes)>;
+    using onStream = std::function<void(int stream, int codecid, const void *extra, size_t bytes, int finish)>;
 
     virtual ssize_t input(const uint8_t *data, size_t bytes) = 0;
     void setOnDecode(onDecode cb);
@@ -41,7 +41,7 @@ class DecoderImp{
 public:
     typedef enum { decoder_ts = 0, decoder_ps } Type;
 
-    typedef std::shared_ptr<DecoderImp> Ptr;
+    using Ptr = std::shared_ptr<DecoderImp>;
     ~DecoderImp() = default;
 
     static Ptr createDecoder(Type type, MediaSinkInterface *sink);
diff --git a/src/Rtp/GB28181Process.h b/src/Rtp/GB28181Process.h
index a8e4f4d9..2ab688cf 100644
--- a/src/Rtp/GB28181Process.h
+++ b/src/Rtp/GB28181Process.h
@@ -16,15 +16,16 @@
 #include "Decoder.h"
 #include "ProcessInterface.h"
 #include "Http/HttpRequestSplitter.h"
-// for MediaInfo
+#include "Rtsp/RtpCodec.h"
 #include "Common/MediaSource.h"
 
 namespace mediakit{
-class RtpCodec;
+
 class RtpReceiverImp;
 class GB28181Process : public ProcessInterface {
 public:
-    typedef std::shared_ptr<GB28181Process> Ptr;
+    using Ptr = std::shared_ptr<GB28181Process>;
+
     GB28181Process(const MediaInfo &media_info, MediaSinkInterface *sink);
     ~GB28181Process() override = default;
 
@@ -52,7 +53,7 @@ private:
     DecoderImp::Ptr _decoder;
     MediaSinkInterface *_interface;
     std::shared_ptr<FILE> _save_file_ps;
-    std::unordered_map<uint8_t, std::shared_ptr<RtpCodec> > _rtp_decoder;
+    std::unordered_map<uint8_t, RtpCodec::Ptr> _rtp_decoder;
     std::unordered_map<uint8_t, std::shared_ptr<RtpReceiverImp> > _rtp_receiver;
 };
 
diff --git a/src/Rtp/RawEncoder.h b/src/Rtp/RawEncoder.h
index ca5e1841..8bc7c98e 100644
--- a/src/Rtp/RawEncoder.h
+++ b/src/Rtp/RawEncoder.h
@@ -14,9 +14,10 @@
 #if defined(ENABLE_RTPPROXY)
 
 #include "Common/MediaSink.h"
+#include "Rtsp/RtpCodec.h"
 
 namespace mediakit {
-class RtpCodec;
+
 class RawEncoderImp : public MediaSinkInterface {
 public:
     RawEncoderImp(uint32_t ssrc, uint8_t payload_type = 96, bool send_audio = true);
@@ -48,7 +49,7 @@ private:
     bool _send_audio;
     uint8_t _payload_type;
     uint32_t _ssrc;
-    std::shared_ptr<RtpCodec> _rtp_encoder;
+    RtpCodec::Ptr _rtp_encoder;
 };
 
 } // namespace mediakit
diff --git a/src/Rtp/RtpProcess.h b/src/Rtp/RtpProcess.h
index afa3e06f..d6d04fca 100644
--- a/src/Rtp/RtpProcess.h
+++ b/src/Rtp/RtpProcess.h
@@ -20,7 +20,7 @@ namespace mediakit {
 
 class RtpProcess final : public RtcpContextForRecv, public toolkit::SockInfo, public MediaSinkInterface, public MediaSourceEventInterceptor, public std::enable_shared_from_this<RtpProcess>{
 public:
-    typedef std::shared_ptr<RtpProcess> Ptr;
+    using Ptr = std::shared_ptr<RtpProcess>;
     friend class RtpProcessHelper;
     RtpProcess(const std::string &stream_id);
     ~RtpProcess();
diff --git a/src/Rtp/RtpSelector.h b/src/Rtp/RtpSelector.h
index 96888598..d5d6dda1 100644
--- a/src/Rtp/RtpSelector.h
+++ b/src/Rtp/RtpSelector.h
@@ -23,7 +23,7 @@ namespace mediakit{
 class RtpSelector;
 class RtpProcessHelper : public MediaSourceEvent , public std::enable_shared_from_this<RtpProcessHelper> {
 public:
-    typedef std::shared_ptr<RtpProcessHelper> Ptr;
+    using Ptr = std::shared_ptr<RtpProcessHelper>;
     RtpProcessHelper(const std::string &stream_id, const std::weak_ptr<RtpSelector > &parent);
     ~RtpProcessHelper();
     void attachEvent();
diff --git a/src/Rtp/RtpSender.h b/src/Rtp/RtpSender.h
index d59052e1..99c8fd0a 100644
--- a/src/Rtp/RtpSender.h
+++ b/src/Rtp/RtpSender.h
@@ -22,7 +22,7 @@ namespace mediakit{
 //rtp发送客户端，支持发送GB28181协议
 class RtpSender final : public MediaSinkInterface, public std::enable_shared_from_this<RtpSender>{
 public:
-    typedef std::shared_ptr<RtpSender> Ptr;
+    using Ptr = std::shared_ptr<RtpSender>;
 
     RtpSender(toolkit::EventPoller::Ptr poller = nullptr);
     ~RtpSender() override;
diff --git a/src/Rtsp/RtpMultiCaster.h b/src/Rtsp/RtpMultiCaster.h
index 1fe8e380..022d9d83 100644
--- a/src/Rtsp/RtpMultiCaster.h
+++ b/src/Rtsp/RtpMultiCaster.h
@@ -41,8 +41,9 @@ private:
 
 class RtpMultiCaster {
 public:
-    typedef std::shared_ptr<RtpMultiCaster> Ptr;
-    typedef std::function<void()> onDetach;
+    using Ptr = std::shared_ptr<RtpMultiCaster>;
+    using onDetach = std::function<void()>;
+
     ~RtpMultiCaster();
 
     static Ptr get(toolkit::SocketHelper &helper, const std::string &local_ip, const std::string &vhost, const std::string &app, const std::string &stream);
diff --git a/src/Rtsp/Rtsp.h b/src/Rtsp/Rtsp.h
index e50e09a2..7cbcfbcc 100644
--- a/src/Rtsp/Rtsp.h
+++ b/src/Rtsp/Rtsp.h
@@ -17,9 +17,7 @@
 #include <unordered_map>
 #include "Common/macros.h"
 #include "Extension/Frame.h"
-namespace toolkit {
-    class Socket;
-}
+#include "Network/Socket.h"
 
 namespace mediakit {
 
@@ -335,7 +333,7 @@ private:
 //创建rtp over tcp4个字节的头
 toolkit::Buffer::Ptr makeRtpOverTcpPrefix(uint16_t size, uint8_t interleaved);
 //创建rtp-rtcp端口对
-void makeSockPair(std::pair<std::shared_ptr<toolkit::Socket>, std::shared_ptr<toolkit::Socket>> &pair, const std::string &local_ip, bool re_use_port = false, bool is_udp = true);
+void makeSockPair(std::pair<toolkit::Socket::Ptr, toolkit::Socket::Ptr> &pair, const std::string &local_ip, bool re_use_port = false, bool is_udp = true);
 //十六进制方式打印ssrc
 std::string printSSRC(uint32_t ui32Ssrc);
 
diff --git a/src/Rtsp/RtspDemuxer.h b/src/Rtsp/RtspDemuxer.h
index de9dd310..51b7bfea 100644
--- a/src/Rtsp/RtspDemuxer.h
+++ b/src/Rtsp/RtspDemuxer.h
@@ -12,13 +12,14 @@
 #define SRC_RTP_RTSPDEMUXER_H_
 
 #include <unordered_map>
+#include "Rtsp/RtpCodec.h"
 #include "Common/MediaSink.h"
 
 namespace mediakit {
-class RtpCodec;
+
 class RtspDemuxer : public Demuxer {
 public:
-    typedef std::shared_ptr<RtspDemuxer> Ptr;
+    using Ptr = std::shared_ptr<RtspDemuxer>;
     RtspDemuxer() = default;
     virtual ~RtspDemuxer() = default;
 
@@ -49,8 +50,8 @@ private:
     float _duration = 0;
     AudioTrack::Ptr _audio_track;
     VideoTrack::Ptr _video_track;
-    std::shared_ptr<RtpCodec> _audio_rtp_decoder;
-    std::shared_ptr<RtpCodec> _video_rtp_decoder;
+    RtpCodec::Ptr _audio_rtp_decoder;
+    RtpCodec::Ptr _video_rtp_decoder;
 };
 
 } /* namespace mediakit */
diff --git a/src/Rtsp/RtspMediaSourceImp.h b/src/Rtsp/RtspMediaSourceImp.h
index 3bd9af02..385fc80a 100644
--- a/src/Rtsp/RtspMediaSourceImp.h
+++ b/src/Rtsp/RtspMediaSourceImp.h
@@ -12,6 +12,7 @@
 #define SRC_RTSP_RTSPTORTMPMEDIASOURCE_H_
 
 #include "RtspMediaSource.h"
+#include "RtspDemuxer.h"
 #include "Common/MultiMediaSourceMuxer.h"
 
 namespace mediakit {
@@ -109,7 +110,7 @@ public:
 private:
     bool _all_track_ready = false;
     ProtocolOption _option;
-    std::shared_ptr<RtspDemuxer> _demuxer;
+    RtspDemuxer::Ptr _demuxer;
     MultiMediaSourceMuxer::Ptr _muxer;
 };
 } /* namespace mediakit */
diff --git a/src/Rtsp/RtspMediaSourceMuxer.h b/src/Rtsp/RtspMediaSourceMuxer.h
index 65e6f91a..d8f40101 100644
--- a/src/Rtsp/RtspMediaSourceMuxer.h
+++ b/src/Rtsp/RtspMediaSourceMuxer.h
@@ -19,7 +19,7 @@ namespace mediakit {
 class RtspMediaSourceMuxer final : public RtspMuxer, public MediaSourceEventInterceptor,
                                    public std::enable_shared_from_this<RtspMediaSourceMuxer> {
 public:
-    typedef std::shared_ptr<RtspMediaSourceMuxer> Ptr;
+    using Ptr = std::shared_ptr<RtspMediaSourceMuxer>;
 
     RtspMediaSourceMuxer(const std::string &vhost,
                          const std::string &strApp,
diff --git a/src/Rtsp/RtspPlayer.h b/src/Rtsp/RtspPlayer.h
index a0d328da..0bd101cd 100644
--- a/src/Rtsp/RtspPlayer.h
+++ b/src/Rtsp/RtspPlayer.h
@@ -20,9 +20,10 @@
 #include "Network/TcpClient.h"
 #include "RtspSplitter.h"
 #include "RtpReceiver.h"
+#include "Rtcp/RtcpContext.h"
 
 namespace mediakit {
-class RtcpContext;
+
 //实现了rtsp播放器协议部分的功能，及数据接收功能
 class RtspPlayer : public PlayerBase, public toolkit::TcpClient, public RtspSplitter, public RtpReceiver {
 public:
@@ -143,7 +144,7 @@ private:
     //rtcp发送时间,trackid idx 为数组下标
     toolkit::Ticker _rtcp_send_ticker[2];
     //统计rtp并发送rtcp
-    std::vector<std::shared_ptr<RtcpContext>> _rtcp_context;
+    std::vector<RtcpContext::Ptr> _rtcp_context;
 };
 
 } /* namespace mediakit */
diff --git a/src/Rtsp/RtspPlayerImp.h b/src/Rtsp/RtspPlayerImp.h
index db0a1cc2..9243696a 100644
--- a/src/Rtsp/RtspPlayerImp.h
+++ b/src/Rtsp/RtspPlayerImp.h
@@ -15,10 +15,11 @@
 #include <algorithm>
 #include <functional>
 #include "RtspPlayer.h"
+#include "RtspDemuxer.h"
+#include "RtspMediaSource.h"
 
 namespace mediakit {
-class RtspDemuxer;
-class RtspMediaSource;
+
 class RtspPlayerImp : public PlayerImp<RtspPlayer, PlayerBase> ,private TrackListener {
 public:
     using Ptr = std::shared_ptr<RtspPlayerImp>;
@@ -71,8 +72,8 @@ private:
     void addTrackCompleted() override;
 
 private:
-    std::shared_ptr<RtspDemuxer> _demuxer;
-    std::shared_ptr<RtspMediaSource> _rtsp_media_src;
+    RtspDemuxer::Ptr _demuxer;
+    RtspMediaSource::Ptr _rtsp_media_src;
 };
 
 } /* namespace mediakit */
diff --git a/src/Rtsp/RtspPusher.h b/src/Rtsp/RtspPusher.h
index 48a59d95..2cddd61f 100644
--- a/src/Rtsp/RtspPusher.h
+++ b/src/Rtsp/RtspPusher.h
@@ -19,12 +19,13 @@
 #include "Network/TcpClient.h"
 #include "RtspSplitter.h"
 #include "Pusher/PusherBase.h"
+#include "Rtcp/RtcpContext.h"
 
 namespace mediakit {
-class RtcpContext;
+
 class RtspPusher : public toolkit::TcpClient, public RtspSplitter, public PusherBase {
 public:
-    typedef std::shared_ptr<RtspPusher> Ptr;
+    using Ptr = std::shared_ptr<RtspPusher>;
     RtspPusher(const toolkit::EventPoller::Ptr &poller,const RtspMediaSource::Ptr &src);
     ~RtspPusher() override;
     void publish(const std::string &url) override;
@@ -83,9 +84,9 @@ private:
     //RTCP端口,trackid idx 为数组下标
     toolkit::Socket::Ptr _rtcp_sock[2];
     //超时功能实现
-    std::shared_ptr<toolkit::Timer> _publish_timer;
+    toolkit::Timer::Ptr _publish_timer;
     //心跳定时器
-    std::shared_ptr<toolkit::Timer> _beat_timer;
+    toolkit::Timer::Ptr _beat_timer;
     std::weak_ptr<RtspMediaSource> _push_src;
     RtspMediaSource::RingType::RingReader::Ptr _rtsp_reader;
     std::function<void(const Parser&)> _on_res_func;
@@ -93,7 +94,7 @@ private:
     //rtcp发送时间,trackid idx 为数组下标
     toolkit::Ticker _rtcp_send_ticker[2];
     //统计rtp并发送rtcp
-    std::vector<std::shared_ptr<RtcpContext>> _rtcp_context;
+    std::vector<RtcpContext::Ptr> _rtcp_context;
 };
 
 using RtspPusherImp = PusherImp<RtspPusher, PusherBase>;
diff --git a/src/Rtsp/RtspSession.h b/src/Rtsp/RtspSession.h
index 6d11c203..df2be74f 100644
--- a/src/Rtsp/RtspSession.h
+++ b/src/Rtsp/RtspSession.h
@@ -17,15 +17,14 @@
 #include "Network/Session.h"
 #include "RtspSplitter.h"
 #include "RtpReceiver.h"
+#include "Rtcp/RtcpContext.h"
 #include "RtspMediaSource.h"
 #include "RtspMediaSourceImp.h"
+#include "RtpMultiCaster.h"
 
 namespace mediakit {
-class RtpMultiCaster;
-class RtspSession;
-class RtcpContext;
-using BufferRtp = toolkit::BufferOffset<toolkit::Buffer::Ptr>;
 
+using BufferRtp = toolkit::BufferOffset<toolkit::Buffer::Ptr>;
 class RtspSession : public toolkit::Session, public RtspSplitter, public RtpReceiver, public MediaSourceEvent {
 public:
     using Ptr = std::shared_ptr<RtspSession>;
@@ -183,7 +182,7 @@ private:
     std::unordered_set<int> _udp_connected_flags;
     ////////RTP over udp_multicast////////
     //共享的rtp组播对象
-    std::shared_ptr<RtpMultiCaster> _multicaster;
+    RtpMultiCaster::Ptr _multicaster;
     ////////RTSP over HTTP  ////////
     //quicktime 请求rtsp会产生两次tcp连接，
     //一次发送 get 一次发送post，需要通过x-sessioncookie关联起来
@@ -193,7 +192,7 @@ private:
     //rtcp发送时间,trackid idx 为数组下标
     toolkit::Ticker _rtcp_send_tickers[2];
     //统计rtp并发送rtcp
-    std::vector<std::shared_ptr<RtcpContext>> _rtcp_context;
+    std::vector<RtcpContext::Ptr> _rtcp_context;
 };
 
 /**
diff --git a/tests/DeviceHK/DeviceHK.h b/tests/DeviceHK/DeviceHK.h
index 22d69841..68ea1aa0 100644
--- a/tests/DeviceHK/DeviceHK.h
+++ b/tests/DeviceHK/DeviceHK.h
@@ -52,7 +52,7 @@ typedef function<void(bool success)> relustCB;
 
 class Device: public enable_shared_from_this<Device> {
 public:
-    typedef std::shared_ptr<Device> Ptr;
+    using Ptr = std::shared_ptr<Device>;
     Device() {
     }
     virtual ~Device(){ disconnect([](bool bSuccess){
@@ -81,7 +81,7 @@ protected:
 class DevChannelHK;
 class DeviceHK: public Device {
 public:
-    typedef std::shared_ptr<DeviceHK> Ptr;
+    using Ptr = std::shared_ptr<DeviceHK>;
     DeviceHK();
     virtual ~DeviceHK();
 
@@ -100,7 +100,7 @@ private:
 
 class DevChannelHK: public DevChannel {
 public:
-    typedef std::shared_ptr<DevChannel> Ptr;
+    using Ptr = std::shared_ptr<DevChannel>;
     DevChannelHK(int64_t i64LoginId, const char *pcDevName, int iChn, bool bMainStream = true);
     virtual ~DevChannelHK();
 protected:
diff --git a/webrtc/WebRtcSession.h b/webrtc/WebRtcSession.h
index c4303b85..6ce881ba 100644
--- a/webrtc/WebRtcSession.h
+++ b/webrtc/WebRtcSession.h
@@ -12,6 +12,7 @@
 #ifndef ZLMEDIAKIT_WEBRTCSESSION_H
 #define ZLMEDIAKIT_WEBRTCSESSION_H
 
+#include "WebRtcTransport.h"
 #include "Network/Session.h"
 #include "Http/HttpRequestSplitter.h"
 
@@ -47,7 +48,7 @@ private:
     Ticker _ticker;
     struct sockaddr_storage _peer_addr;
     std::weak_ptr<toolkit::TcpServer> _server;
-    std::shared_ptr<WebRtcTransportImp> _transport;
+    WebRtcTransportImp::Ptr _transport;
 };
 
 }// namespace mediakit
diff --git a/webrtc/WebRtcTransport.h b/webrtc/WebRtcTransport.h
index bc2c316c..3978864b 100644
--- a/webrtc/WebRtcTransport.h
+++ b/webrtc/WebRtcTransport.h
@@ -24,9 +24,10 @@
 #include "Nack.h"
 #include "TwccContext.h"
 #include "SctpAssociation.hpp"
+#include "Rtcp/RtcpContext.h"
 
 namespace mediakit {
-class RtcpContext;
+
 //RTC配置项目
 namespace Rtc {
 extern const std::string kPort;
@@ -201,7 +202,7 @@ public:
 
     //for send rtp
     NackList nack_list;
-    std::shared_ptr<RtcpContext> rtcp_context_send;
+    RtcpContext::Ptr rtcp_context_send;
 
     //for recv rtp
     std::unordered_map<std::string/*rid*/, std::shared_ptr<RtpChannel> > rtp_channel;