diff --git a/src/Common/MediaSink.h b/src/Common/MediaSink.h
index 3d313f2a..a2c043a7 100644
--- a/src/Common/MediaSink.h
+++ b/src/Common/MediaSink.h
@@ -37,6 +37,10 @@ using namespace toolkit;
 
 namespace mediakit{
 
+/**
+ * 该类的作用是等待Track ready()返回true也就是就绪后再通知派生类进行下一步的操作
+ * 目的是输入Frame前由Track截取处理下，以便获取有效的信息（譬如sps pps aa_cfg）
+ */
 class MediaSink : public FrameWriterInterface , public std::enable_shared_from_this<MediaSink>{
 public:
     typedef std::shared_ptr<MediaSink> Ptr;
diff --git a/src/Player/Frame.h b/src/Player/Frame.h
index a9c8c405..b7a1547b 100644
--- a/src/Player/Frame.h
+++ b/src/Player/Frame.h
@@ -52,6 +52,9 @@ typedef enum {
     TrackMax = 0x7FFF
 } TrackType;
 
+/**
+ * 编码信息的抽象接口
+ */
 class CodecInfo {
 public:
     typedef std::shared_ptr<CodecInfo> Ptr;
@@ -70,6 +73,9 @@ public:
     virtual CodecId getCodecId() const = 0;
 };
 
+/**
+ * 帧类型的抽象接口
+ */
 class Frame : public Buffer, public CodecInfo{
 public:
     typedef std::shared_ptr<Frame> Ptr;
@@ -92,6 +98,10 @@ public:
     virtual bool keyFrame() const = 0;
 };
 
+/**
+ * 循环池辅助类
+ * @tparam T
+ */
 template <typename T>
 class ResourcePoolHelper{
 public:
@@ -107,6 +117,9 @@ private:
     ResourcePool<T> _pool;
 };
 
+/**
+ * 写帧接口的抽闲接口
+ */
 class FrameWriterInterface {
 public:
     typedef std::shared_ptr<FrameWriterInterface> Ptr;
@@ -120,11 +133,18 @@ public:
     virtual void inputFrame(const Frame::Ptr &frame) = 0;
 };
 
+/**
+ * 写帧接口转function，辅助类
+ */
 class FrameWriterInterfaceHelper : public FrameWriterInterface {
 public:
     typedef std::shared_ptr<FrameWriterInterfaceHelper> Ptr;
     typedef std::function<void(const Frame::Ptr &frame)> onWriteFrame;
 
+    /**
+     * inputFrame后触发onWriteFrame回调
+     * @param cb
+     */
     FrameWriterInterfaceHelper(const onWriteFrame& cb){
         _writeCallback = cb;
     }
@@ -165,6 +185,9 @@ public:
     virtual void setFrameRing(const RingType::Ptr &ring)  = 0;
 };
 
+/**
+ * 帧环形缓存
+ */
 class FrameRing : public FrameRingInterface{
 public:
     typedef std::shared_ptr<FrameRing> Ptr;
@@ -202,6 +225,9 @@ protected:
     RingType::Ptr _frameRing;
 };
 
+/**
+ * 支持代理转发的帧环形缓存
+ */
 class FrameRingInterfaceDelegate : public FrameRing {
 public:
     typedef std::shared_ptr<FrameRingInterfaceDelegate> Ptr;
diff --git a/src/Player/Track.h b/src/Player/Track.h
index 7d40dbfd..c9a34326 100644
--- a/src/Player/Track.h
+++ b/src/Player/Track.h
@@ -37,6 +37,9 @@ using namespace toolkit;
 
 namespace mediakit{
 
+/**
+ * 媒体通道描述类，也支持帧输入输出
+ */
 class Track : public FrameRingInterfaceDelegate , public CodecInfo{
 public:
     typedef std::shared_ptr<Track> Ptr;
@@ -45,25 +48,30 @@ public:
     virtual ~Track(){}
 
     /**
-     * 是否准备好
+     * 是否准备好，准备好才能获取譬如sps pps等信息
      * @return
      */
     virtual bool ready() = 0;
 
     /**
      * 克隆接口，用于复制本对象用
+     * 在调用该接口时只会复制派生类的信息
+     * 环形缓存和代理关系不能拷贝，否则会关系紊乱
      * @return
      */
     virtual Track::Ptr clone() = 0;
 
     /**
-     * 复制拷贝，只能拷贝一些描述信息，
+     * 复制拷贝，只能拷贝派生类的信息，
      * 环形缓存和代理关系不能拷贝，否则会关系紊乱
      * @param that
      */
     Track(const Track &that){}
 };
 
+/**
+ * 视频通道描述Track类，支持获取宽高fps信息
+ */
 class VideoTrack : public Track {
 public:
     typedef std::shared_ptr<VideoTrack> Ptr;
@@ -89,6 +97,9 @@ public:
     virtual float getVideoFps() const = 0;
 };
 
+/**
+ * 音频Track派生类，支持采样率通道数，采用位数信息
+ */
 class AudioTrack : public Track {
 public:
     typedef std::shared_ptr<AudioTrack> Ptr;
@@ -114,6 +125,9 @@ public:
     virtual int getAudioChannel() const = 0;
 };
 
+/**
+ * 264视频通道
+ */
 class H264Track : public VideoTrack{
 public:
     typedef std::shared_ptr<H264Track> Ptr;
@@ -270,6 +284,9 @@ private:
     float _fps = 0;
 };
 
+/**
+ * aac音频通道
+ */
 class AACTrack : public AudioTrack{
 public:
     typedef std::shared_ptr<AACTrack> Ptr;