rtmp解复用支持无内存拷贝

hls生成支持输入无0x 00 00 01的H264/H265数据

media-server @ e399b938

-Subproject commit 0e726dd4e06ab4ed3723deaf3f73386e100bb10d
+Subproject commit e399b93802610dcf574ff64bcb7677572cd028c1

src/Extension/H264.h

@@ -92,6 +92,11 @@ public:
 };
 
 
+/**
+ * 防止内存拷贝的H264类
+ * 用户可以通过该类型快速把一个指针无拷贝的包装成Frame类
+ * 该类型在DevChannel中有使用
+ */
 class H264FrameNoCacheAble : public FrameNoCacheAble {
 public:
     typedef std::shared_ptr<H264FrameNoCacheAble> Ptr;
@@ -117,17 +122,26 @@ public:
     }
 };
 
+/**
+ * 一个H264Frame类中可以有多个帧，他们通过 0x 00 00 01 分隔
+ * ZLMediaKit会先把这种复合帧split成单个帧然后再处理
+ * 一个复合帧可以通过无内存拷贝的方式切割成多个H264FrameSubFrame
+ * 提供该类的目的是切换复合帧时防止内存拷贝，提高性能
+ */
 class H264FrameSubFrame : public H264FrameNoCacheAble{
 public:
     typedef std::shared_ptr<H264FrameSubFrame> Ptr;
-    H264FrameSubFrame(const Frame::Ptr &strongRef,
+    H264FrameSubFrame(const Frame::Ptr &parent_frame,
                       char *ptr,
                       uint32_t size,
-                      int prefixeSize) : H264FrameNoCacheAble(ptr,size,strongRef->dts(),strongRef->pts(),prefixeSize){
-        _strongRef = strongRef;
+                      int prefixeSize) : H264FrameNoCacheAble(ptr,size,parent_frame->dts(),parent_frame->pts(),prefixeSize){
+        _parent_frame = parent_frame;
+    }
+    bool cacheAble() const override {
+        return _parent_frame->cacheAble();
     }
 private:
-    Frame::Ptr _strongRef;
+    Frame::Ptr _parent_frame;
 };
 
 /**

src/Extension/H264Rtmp.cpp

@@ -108,6 +108,7 @@ inline void H264RtmpDecoder::onGetH264_l(const char* pcData, int iLen, uint32_t
     }
 }
 inline void H264RtmpDecoder::onGetH264(const char* pcData, int iLen, uint32_t dts,uint32_t pts) {
+#if 0
     _h264frame->type = H264_TYPE(pcData[0]);
     _h264frame->timeStamp = dts;
     _h264frame->ptsStamp = pts;
@@ -117,6 +118,11 @@ inline void H264RtmpDecoder::onGetH264(const char* pcData, int iLen, uint32_t dt
     //写入环形缓存
     RtmpCodec::inputFrame(_h264frame);
     _h264frame = obtainFrame();
+#else
+    //防止内存拷贝，这样产生的264帧不会有0x00 00 01头
+    auto frame = std::make_shared<H264FrameNoCacheAble>((char *)pcData,iLen,dts,pts,0);
+    RtmpCodec::inputFrame(frame);
+#endif
 }
 
 

src/MediaFile/TsMuxer.cpp

@@ -70,7 +70,12 @@ void TsMuxer::inputFrame(const Frame::Ptr &frame) {
                 if(_frameCached.size() != 1){
                     string merged;
                     _frameCached.for_each([&](const Frame::Ptr &frame){
-                        merged.append(frame->data(),frame->size());
+                        if(frame->prefixSize()){
+                            merged.append(frame->data(),frame->size());
+                        } else{
+                            merged.append("\x00\x00\x00\x01",4);
+                            merged.append(frame->data(),frame->size());
+                        }
                     });
                     merged_frame = std::make_shared<BufferString>(std::move(merged));
                 }