Intel IXP400 Manuale Utente

API Reference Manual

Intel

IXP400 Digital Signal Processing (DSP) Software Version 2.5

Contents

1.0

Introduction

............................................................................................................ 7

1.1

General............................................................................................................ 7

1.2

Scope .............................................................................................................. 7

1.3

Audience ......................................................................................................... 7

1.4

Acronyms ........................................................................................................ 7

2.0

Architectural Overview

...................................................................................... 9

3.0

Media Processing Resource Components

.............................................. 10

3.1

Network Endpoint Resource Component ...................................................... 10

3.2

Decoder Resource Component..................................................................... 11

3.3

Encoder Resource Component ..................................................................... 13

3.4

Tone Generation Resource Component ....................................................... 15

3.5

Tone Detection Resource Component .......................................................... 16

3.6

Audio Player Resource Component .............................................................. 17

3.7

Audio Mixer Resource Component ............................................................... 17

3.8

T.38 Fax Resource Component .................................................................... 18

3.9

Message Agent Resource Component ......................................................... 19

4.0

Message Format and Delivery Mechanism

.............................................. 20

4.1

Message Functions ....................................................................................... 20

4.2

Message Header Format............................................................................... 21

4.3

Message Type List ........................................................................................ 22

5.0

Common Control Message

............................................................................. 23

5.1

Reset Message ............................................................................................. 23

5.2

Start Message ............................................................................................... 23

5.3

Stop Message ............................................................................................... 24

5.4

Ping Message................................................................................................ 24

5.5

Set-Parameter Message ............................................................................... 24

5.6

Set-Multiple-Parameter Message.................................................................. 25

5.7

Get-Parameter Message ............................................................................... 26

5.8

Get-Parameter Acknowledge Message......................................................... 26

5.9

Get-All-Parameters Message ........................................................................ 26

5.10

Get-All-Parameters Acknowledge Message.................................................. 27

5.11

General-Acknowledge Message ................................................................... 27

5.12

Error Message............................................................................................... 28

5.13

Event Message.............................................................................................. 28

6.0

Resource-Specific Control Messages

....................................................... 29

6.1

CODEC Start Message ................................................................................. 29

6.2

CODEC Stop-Acknowledgement Message................................................... 29

6.3

Tone Generator Play Message ..................................................................... 30

6.4

Tone Generator Play-FSK Message ............................................................. 30

6.5

Tone Generator Play-Completed Message................................................... 31

6.6

Tone Detector Receive-Digit Message.......................................................... 31

6.7

Tone Detector Receive-Completed Message ............................................... 32