实现rtsp/rtmp按需转协议功能

src/Rtmp/RtmpMediaSource.h

@@ -60,7 +60,7 @@ public:
             MediaSource(RTMP_SCHEMA, vhost, app, stream_id), _ring_size(ring_size) {
     }
 
-    virtual ~RtmpMediaSource() {}
+    ~RtmpMediaSource() override{}
 
     /**
      * 	获取媒体源的环形缓冲
@@ -134,7 +134,7 @@ public:
 
         if (!_ring) {
             weak_ptr<RtmpMediaSource> weakSelf = dynamic_pointer_cast<RtmpMediaSource>(shared_from_this());
-            auto lam = [weakSelf](const EventPoller::Ptr &, int size, bool) {
+            auto lam = [weakSelf](int size) {
                 auto strongSelf = weakSelf.lock();
                 if (!strongSelf) {
                     return;
@@ -174,6 +174,11 @@ public:
         return ret;
     }
 
+    void clearCache() override{
+        PacketCache<RtmpPacket>::clearCache();
+        _ring->clearCache();
+    }
+
 private:
     /**
     * 批量flush rtmp包时触发该函数
@@ -185,15 +190,6 @@ private:
         _ring->write(rtmp_list, _have_video ? key_pos : true);
     }
 
-    /**
-     * 每次增减消费者都会触发该函数
-     */
-    void onReaderChanged(int size) {
-        if (size == 0) {
-            onNoneReader();
-        }
-    }
-
 private:
     bool _have_video = false;
     int _ring_size;