AQOfflineRenderTest |
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DESCRIPTION: |
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AQOfflineRenderTest demonstrates the use of the AudioQueueOfflineRender API. |
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All the relevant code is in the file aqofflinerender.cpp. |
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Touching the "Start" button simply calls the function DoAQOfflineRender() producing LPCM output buffers from an ALAC encoded source file. These buffers are then written to a .caf file which is played back after rendering using AVAudioPlayer to confirm success. |
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RELATED INFORMATION: |
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Core Audio Overview |
Audio Queue Programming Guide |
Audio Queue Services Reference |
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SPECIAL CONSIDERATIONS: |
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See Technical Q&A QA1562 - Audio Queue - Offline Rendering |
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BUILD REQUIREMENTS: |
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iOS 4.0 SDK |
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RUNTIME REQUIREMENTS: |
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iPhone OS 3.2 or later |
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PACKAGING LIST: |
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AQOfflineRenderTestAppDelegate.h |
AQOfflineRenderTestAppDelegate.m |
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The AQOfflineRenderTestAppDelegate class defines the application delegate object, responsible for adding the navigation controllers view to the application window. |
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MyViewController.h |
MyViewController.m |
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The MyViewController class defines the controller object for the application. The object helps set up the user interface, responds to and manages user interaction, and implements sound playback. |
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qofflinerender.cpp |
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This file implements the DoAQOfflineRender function which is called on a background thread from the MyViewController class. |
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All the code demonstrating how to perform offline render is contained in this one file, the rest of the sample can be thought of as a simple framework for the demonstration code in this file. |
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CHANGES FROM PREVIOUS VERSIONS: |
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Version 1.2, added CFBundleIconFiles in Info.plist. |
Version 1.1, upgraded project to build with the iOS 4.0 SDK. |
Version 1.0, tested with iPhone OS 2.2.1. First public release. |
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Copyright (C) 2009-2010 Apple Inc. All rights reserved. |
