1. overview

The Stream System Library is a library for efficiently reading streams (such as interleaved files) on a CD.

1.1 Library configuration

Figure 1.1 shows the CD-related library configuration.

Figure 1.1 CD-related library configuration

       ┌────────────────────────────────┐    
       │                                │    
       │          Application           │    
       │                                │    
       └────────────────────────────────┘    
                                             
       ┌───────┐ ┏━━━━━━━━━━━┓ ┌────────┐    
       │MPEG   │ ┃Stream     ┃ │File    │    
       │library│ ┃system     ┃ │system  │    
       │       │ ┃library┏━━━┛ │library │    
       │       │ ┃       ┃ ┌───┘        │    
       │       │ ┃       ┃ │            │    
       └───────┘ ┗━━━━━━━┛ └─────┐      │    
                                 │      │    
       ┌───────────────────────┐ │      │    
       │   CD communication    │ │      │    
       │       interface       │ │      │    
       └───────────┬───────────┘ └──┬───┘    
Software           │                │        
━━━━━━━━━━━━━━━━━━━┿━━━━━━━━━━━━━━━━┿━━━━━━━━
Hardware           │                │        
            ┌──────┴─────┐   ┌──────┴────────┐ 
            │  CD block  │   │SIMM, SCSI file│ 
            └────────────┘   └───────────────┘ 

1.2 Overview of stream system functions

(1)Support CD-ROM XA level file access

• Supports access to Mode 2 sectors using subheaders.
  (Access to mode 1 sector is also possible)

(2) Support various transfer methods

• Stream data on the CD can be transferred to the main CPU area.

• By registering functions, you can process data while reading stream data on a CD.

• You can freely handle the stream data read into the CD buffer.

(3)Support access by file identifier

• It has the same directory management functionality as a file system, so it can be accessed using a file identifier (order number within the directory).

Figure 1.2 Stream system overview diagram

The stream system allows multiple interleaved streams to be treated as logical data. Each stream is distinguished by a subheader.
In the stream system, applications perform transfer processing by calling server functions. If you register a transfer function, the server function calls the transfer function instead of transferring to the buffer. Applications can transfer data while converting it using registered transfer functions.