优化代码

空构造和析构函数替换为缺省
去除多余分号

src/Rtmp/Rtmp.h

@@ -207,8 +207,8 @@ class Metadata : public CodecInfo{
 public:
     using Ptr = std::shared_ptr<Metadata>;
 
-    Metadata():_metadata(AMF_OBJECT){}
-    virtual ~Metadata(){}
+    Metadata(): _metadata(AMF_OBJECT) {}
+    virtual ~Metadata() = default;
     const AMFValue &getMetadata() const{
         return _metadata;
     }
@@ -239,7 +239,7 @@ public:
     using Ptr = std::shared_ptr<VideoMeta>;
 
     VideoMeta(const VideoTrack::Ptr &video);
-    virtual ~VideoMeta(){}
+    virtual ~VideoMeta() = default;
 
     CodecId getCodecId() const override{
         return _codecId;
@@ -253,8 +253,7 @@ public:
     using Ptr = std::shared_ptr<AudioMeta>;
 
     AudioMeta(const AudioTrack::Ptr &audio);
-
-    virtual ~AudioMeta(){}
+    virtual ~AudioMeta() = default;
 
     CodecId getCodecId() const override{
         return _codecId;