QuickTime Kit Programming Guide - filibeto.org

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Organization of This Document See Also I N T R O D U C T I O N Introduction to QuickTime Kit Programming Guide This document follows a progressive, learn-as-you-go structure. Each chapter depends, to a certain extent, on understanding the material in any previous chapters. ■ “The QuickTime Kit API” (page 11) describes the various classes and functions in the QuickTime Kit and some of their possible uses. ■ “Building a Simple QTKitPlayer Application” (page 17) explains how you can build a simple QTKitPlayer application. ■ “Extending the QTKitPlayer Application” (page 29) discusses how you can extend the functionality of the QTKitPlayer application by adding Cocoa code to your Xcode project. ■ “Adding New Capabilities to the QTKitPlayer Application” (page 61) discusses how you can add a simple Cocoa drawer with a timer to your QTKitPlayer application and how you can take advantage of the QuickTime C API. ■ “Extending the QTKitPlayer To Stream Audio and Video” (page 79) describes how you can add the streaming of audio and video to your QTKitPlayer application. ■ “Adding Multimedia Playback Capability” (page 99) explains in detail how you can extend your QTKitPlayer application to add multimedia playback capabilities. This introductory and tutorial document is designed as companion text to the reference material in QuickTime Kit Framework Reference. The various classes and methods in the QuickTime Kit framework are described in detail therein. Have that document handy as you learn the API and work through the various steps you need to follow in building a QuickTime application. 10 Organization of This Document 2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.
C H A P T E R 1 The QuickTime Kit API The QuickTime Kit framework was developed by Apple to provide support for the most common media-related needs of Cocoa developers. This support was accomplished by using certain abstractions and data types familiar to Cocoa programmers and by defining other abstractions and data types that are new––but only where necessary. This chapter describes the various Objective-C classes and methods implemented with QuickTime that make up the QuickTime Kit framework and discusses some of their features and possible uses. You’ll want to read this chapter, which is brief, for an overview of the QuickTime Kit classes and functions. For more detailed information, refer to QuickTime Kit Framework Reference. If you want to see the framework header files, you can find them in the Mac OS X /System/Library/Frameworks directory as QTKit.framework. The new QuickTime palette resides in the /Developer/Extras/Palettes directory as QTKit.palette. In the next chapter, you’ll work with the new QTKit palette and explore its capabilities in building a simple QTKitPlayer application. Working With the QuickTime Kit API The QuickTime Kit is an Objective-C API designed for the basic manipulation of media, including movie playback, editing, and import and export to standard media formats. The framework is at once powerful, yet easy to use in your Cocoa application. The QTKit palette provided in Interface Builder, for example, lets you simply drag a QuickTime movie object, complete with a controller for playback, into a window, and then set attributes for the movie––all of this without writing a single line of code. Notably, the QuickTime Kit provides Objective-C classes that are suitable for use within a wide range of Cocoa-based software, including applications with a GUI and tools intended to run in a “headless” environment. For example, you can use the QuickTime Kit framework to write command-line tools that manipulate QuickTime movie files. One distinct advantage in working with the QuickTime Kit framework is that it does not require, in most cases, a thorough knowledge of the QuickTime C API, which can be in itself something of a daunting task. (The QuickTime C API contains over 2500 function calls and although those calls are documented, developers who are new to QuickTime may find the API more than a bit overwhelming.) Nor does it require an understanding of the fundamentals of Carbon, including but not limited to QuickDraw, the File Manager, and the Memory Manager. Working With the QuickTime Kit API 11 2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.
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