A stream object is a construct that is capable of making external data read requests to the application. It is responsible for opening, reading from, and closing an external device to the standard application data streaming interface. 

It can also be configured to manage a local data cache for faster data streaming speed.

void leStream_Init(
    leStream* stream, 
    leStreamDescriptor* desc, 
    uint32_t cacheSize, 
    uint8_t* cacheBuf, 
    void* userData
);