QuickTime Kit Programming Guide - filibeto.org

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C H A P T E R 5 Extending the QTKitPlayer To Stream Audio and Video BOOL closePanel = YES; // create the movie document if (returnCode == NSOKButton) closePanel = [self createMovieDocumentWithURL:[openURLPanel url] asData:((long)contextInfo == kQTKitPlayerOpenAsData)]; } if (closePanel) [openURLPanel close]; 6. Insert the following code to handle the necessary actions for opening the sheet with a window: - (IBAction)doOpenURL:(id)sender { [[OpenURLPanel openURLPanel] beginSheetWithWindow:nil delegate:self didEndSelector:@selector(openURLPanelDidEnd:returnCode:contextInfo:) contextInfo:((void *)kQTKitPlayerOpenAsURL)]; } - (IBAction)doOpenURLData:(id)sender { [[OpenURLPanel openURLPanel] beginSheetWithWindow:nil delegate:self didEndSelector:@selector(openURLPanelDidEnd:returnCode:contextInfo:) contextInfo:((void *)kQTKitPlayerOpenAsData)]; } 7. These are the methods you need to create and set up the movie document with an associated URL. Insert this chunk of code: - (BOOL)createMovieDocumentWithURL:(NSURL *)url asData:(BOOL)asData { NSDocument *movieDocument = nil; NSDocumentController*documentController; BOOL success = YES; // init documentController = [NSDocumentController sharedDocumentController]; // try to create the document from the URL if (url) { if (asData) movieDocument = [documentController makeDocumentWithContentsOfURL:url ofType:@"MovieDocumentData"]; else movieDocument = [documentController makeDocumentWithContentsOfURL:url ofType:@"MovieDocument"]; } // add the document if (movieDocument) { [documentController addDocument:movieDocument]; // setup [movieDocument makeWindowControllers]; [movieDocument updateChangeCount:NSChangeCleared]; 96 Adding Code To Stream Audio and Video 2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.
C H A P T E R 5 Extending the QTKitPlayer To Stream Audio and Video [movieDocument showWindows]; } else { NSRunAlertPanel(@"Invalid movie", @"The url is not a valid movie.", nil, nil, nil); success = NO; } } return success; This wraps up the code additions for your QTKitPlayer application. Now you’re ready to build and compile the application and play streaming audio and video over the Internet. What’s Next? You’ve extended the QTKitPlayer beyond its early incarnations as a simple media player, adding editing, importing, exporting, and now streaming capabilities. In the next chapter, you’ll provide new enhancements to the player that will enable you to play back as many as six different QuickTime movies, including QuickTime VR, streaming audio and video, wired sprite movies, and other multimedia content. You’ll have a multimedia engine at your disposal that you can use to launch a variety of QuickTime content, much as you would do with an interactive movie kiosk. The steps to create this engine are spelled out in the next chapter and enable you to build on what you’ve learned so far in this programming guide. What’s Next? 97 2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.
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QuickTime Kit Programming Guide 200
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Contents Introduction Introduction
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Figures and Tables Chapter 1 The Qu
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F I G U R E S A N D T A B L E S Fig
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I N T R O D U C T I O N Introductio
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C H A P T E R 1 The QuickTime Kit A
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C H A P T E R 2 Building a Simple Q
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C H A P T E R 3 Extending the QTKit
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QuickTime Kit Programming Guide - filibeto.org

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