Indigo² IMPACT Video^™ Programmer's Guide

Table of Contents

About This Guide

Audience

Structure of This Document

Conventions

1. Features of Indigo2 IMPACT Video

Indigo2 IMPACT Video Board Capabilities

Video Library Capabilities

VL System Software Architecture

VL Architectural Model of Video Devices

Indigo2 IMPACT Video Formats

2. Creating Video Programs With the Video Library

The VL Programming Model

Performing Preliminary Steps

Opening a Connection to the Video Daemon

Specifying Nodes on the Data Path

Creating and Setting Up the Data Path

Setting Parameters for Data Transfer to or From Memory

Displaying Video Data Onscreen

Transferring Video Data to and From Devices

Ending Data Transfer

Example Programs

3. Using VL Controls

VL Control Type and Values

VL Control Fraction Ranges

VL Control Classes

VL Control Groupings

4. Event Handling

Indigo2 IMPACT Video VL Events

Querying VL Events

Creating a VL Event Loop

Creating a Main Loop With Callbacks

5. Managing Connections

Specifying Connectivity

Avoiding Dynamic Switching Problems

6. Video Real-Time Capture and Playback

Video Library Buffers

Caching

Buffer Alignment

Direct I/O to Disk

syssgi

Asynchronous I/O

Capture and Playback Examples

7. Blending, Keying, and Transitions

The Blender Node

Keying

The Keyer

VL Blending Examples

8. Using Optional Color-Space Conversion

Features of the Color-Space Conversion Node

Performing Standard Color-Space Conversions

Using the Color-Space Converter for Image Processing

Examples

9. Using Optional Video Texture Mapping

Performing Video Texture Mapping

Controls for Video Texture Mapping

OpenGL Functions for Video Texture Mapping

Example Program: vidtotex.c

A. Video Basics

Interlacing

Broadcast Standards

Color Encoding

Video Signals

Videotape Formats

B. Return Codes

C. Indigo2 IMPACT Video Nodes and Their Controls

VL_DEVICE

VL_BLENDER

VL_CSC

VL_FB

VL_MEM

VL_SCREEN

VL_TEXTURE

VL_VIDEO

D. Indigo2 IMPACT Video Color-Space Conversions

Indigo2 IMPACT Video Color Spaces

Mathematical Operations Performed During Conversions

Implications of Color-Space Conversions

Example Color Conversions

Glossary

Index