Fix OBU total length error

src/rtp/byte_buffer.h

@@ -0,0 +1,40 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2024-04-22
+ * Copyright (c) 2024 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _BYTE_BUFFER_H_
+#define _BYTE_BUFFER_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+class ByteBufferReader {
+ public:
+  ByteBufferReader(const char* bytes, size_t len);
+
+  ByteBufferReader(const ByteBufferReader&) = delete;
+  ByteBufferReader& operator=(const ByteBufferReader&) = delete;
+
+  // Returns start of unprocessed data.
+  const char* Data() const { return bytes_ + start_; }
+  // Returns number of unprocessed bytes.
+  size_t Length() const { return end_ - start_; }
+
+  bool ReadBytes(char* val, size_t len);
+  bool ReadUInt8(uint8_t* val);
+  bool ReadUVarint(uint64_t* val, size_t* len);
+
+  bool Consume(size_t size);
+
+ protected:
+  void Construct(const char* bytes, size_t size);
+
+  const char* bytes_;
+  size_t size_;
+  size_t start_;
+  size_t end_;
+};
+
+#endif