整理命名空间 (#1409)

* feat: remove using namespace mediakit in header files.

(cherry picked from commit d44aeb339a8a0e1f0455be82b21fe4b1b536299f)

* feat: remove using namespace mediakit in FFmpegSource.h

* feat: remove using namespace mediakit in RtpExt.h

* feat: remove using namespace mediakit in header files.

* feat: remove using namespace std in header files.

* feat: remove using namespace std in header files when zltoolkit remove std in header

* 补充命名空间

* 整理命名空间

* 整理命名空间2

* 修复macos ci

* 修复编译问题

* 修复编译问题2

* 修复编译问题3

Co-authored-by: Johnny <hellojinqiang@gmail.com>
Co-authored-by: Xiaofeng Wang <wasphin@gmail.com>

src/Rtp/TSDecoder.h

@@ -15,12 +15,11 @@
 #include "Http/HttpRequestSplitter.h"
 #include "Decoder.h"
 
-using namespace toolkit;
-namespace mediakit {
-
 #define TS_PACKET_SIZE		188
 #define TS_SYNC_BYTE        0x47
 
+namespace mediakit {
+
 //TS包分割器，用于split一个一个的ts包
 class TSSegment : public HttpRequestSplitter {
 public: