int add_stream(const std::string &url, size_t bytes_received, size_t prebuffering_bytes, Stream::Encoding encoding, Stream::Encoding src_encoding);
int add_stream_from_serialized(const StreamProto &stream, int data_fd);
int lookup_stream_by_url(const std::string &url) const;
int add_stream(const std::string &url, size_t bytes_received, size_t prebuffering_bytes, Stream::Encoding encoding, Stream::Encoding src_encoding);
int add_stream_from_serialized(const StreamProto &stream, int data_fd);
int lookup_stream_by_url(const std::string &url) const;