Fix compile error on Linux platform and use c++ style header file(<cstddef> instead of <stddef.h>)

src/rtp/byte_buffer.cpp

@@ -1,6 +1,6 @@
 #include "byte_buffer.h"
 
-#include <string.h>
+#include <cstring>
 
 ByteBufferReader::ByteBufferReader(const char* bytes, size_t len) {
   Construct(bytes, len);

src/rtp/byte_buffer.h

@@ -7,8 +7,8 @@
 #ifndef _BYTE_BUFFER_H_
 #define _BYTE_BUFFER_H_
 
-#include <stddef.h>
-#include <stdint.h>
+#include <cstddef>
+#include <cstdint>
 
 class ByteBufferReader {
  public:

src/rtp/obu.h

@@ -7,8 +7,8 @@
 #ifndef _OBU_H_
 #define _OBU_H_
 
-#include <stddef.h>
-#include <stdint.h>
+#include <cstddef>
+#include <cstdint>
 
 #include "aom/aom_codec.h"
 

src/rtp/obu_parser.h

@@ -7,9 +7,8 @@
 #ifndef _OBU_PARSER_H_
 #define _OBU_PARSER_H_
 
-#include <stddef.h>
-#include <stdint.h>
-
+#include <cstddef>
+#include <cstdint>
 #include <vector>
 
 #include "obu.h"

src/rtp/rtp_codec.h

@@ -1,8 +1,8 @@
 #ifndef _RTP_CODEC_H_
 #define _RTP_CODEC_H_
 
-#include <stdint.h>
-
+#include <cstddef>
+#include <cstdint>
 #include <vector>
 
 #include "fec_encoder.h"

src/rtp/rtp_packet.h

@@ -1,10 +1,9 @@
 #ifndef _RTP_PACKET_H_
 #define _RTP_PACKET_H_
 
-#include <stddef.h>
-#include <stdint.h>
-#include <string.h>
-
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
 #include <vector>
 
 #include "log.h"

src/rtp/rtp_transceiver.h

@@ -1,6 +1,7 @@
 #ifndef _RTP_TRANSCEIVER_H_
 #define _RTP_TRANSCEIVER_H_
 
+#include <cstddef>
 #include <functional>
 
 class RtpTransceiver {