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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/QuickTime/index.html">QuickTime</a> > <a href="../../samplecode/QuickTime/idxQuickTimeComponentCreation-date.html">QuickTime Component Creation</a> > <A HREF="javascript:location.replace('index.html');">DelegateOnlyComponent</A> >
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<td><h1><div id="pagehead">DelegateOnlyComponent</div></h1></td>
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<h2>/DelegateOnlyImageCodec/DelegateOnly_Codec.c</h2>
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<p><strong><a href="DelegateOnlyComponent.zip">Download Sample</a></strong> (“DelegateOnlyComponent.zip”, 158.2K)<BR>
<strong><a href="DelegateOnlyComponent.dmg">Download Sample</a></strong> (“DelegateOnlyComponent.dmg”, 208.8K)</p>
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<pre class="sourcecodebox">/* File: DelegateOnly_Codec.c Description: Delegates everything to the '2vuy' codec. Author: era Copyright: © Copyright 2003-2005 Apple Computer, Inc. All rights reserved. Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in consideration of your agreement to the following terms, and your use, installation, modification or redistribution of this Apple software constitutes acceptance of these terms. If you do not agree with these terms, please do not use, install, modify or redistribute this Apple software. In consideration of your agreement to abide by the following terms, and subject to these terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in this original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the Apple Software, with or without modifications, in source and/or binary forms; provided that if you redistribute the Apple Software in its entirety and without modifications, you must retain this notice and the following text and disclaimers in all such redistributions of the Apple Software. Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to endorse or promote products derived from the Apple Software without specific prior written permission from Apple. Except as expressly stated in this notice, no other rights or licenses, express or implied, are granted by Apple herein, including but not limited to any patent rights that may be infringed by your derivative works or by other works in which the Apple Software may be incorporated. The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Change History (most recent first):*/#if TARGET_OS_WIN32 #include "ImportExampleStandAloneWin.h"#endif#if TARGET_CPU_68K #error "Stop it! You don't really want to build a 68k component do you?"#endif#if __MACH__ #include <Carbon/Carbon.h> #include <QuickTime/QuickTime.h>#else #include <ConditionalMacros.h> #include <Endian.h> #include <ImageCodec.h>#endif#define kDelegateOnly_CodecVersion (0x0001)// Data structurestypedef struct { ComponentInstance self; ComponentInstance delegateComponent; ComponentInstance target;} DelegateOnly_GlobalsRecord, *DelegateOnly_Globals;// Setup required for ComponentDispatchHelper.c#define IMAGECODEC_BASENAME() DelegateOnly_ImageCodec#define IMAGECODEC_GLOBALS() DelegateOnly_Globals storage#define CALLCOMPONENT_BASENAME() IMAGECODEC_BASENAME()#define CALLCOMPONENT_GLOBALS() IMAGECODEC_GLOBALS()#define COMPONENT_UPP_SELECT_ROOT() ImageCodec#define COMPONENT_DISPATCH_FILE "DelegateOnly_CodecDispatch.h"#define GET_DELEGATE_COMPONENT() (storage->delegateComponent)#if __MACH__ #include <CoreServices/Components.k.h> #include <QuickTime/ImageCodec.k.h> // ComponentProperty selectors live here as well #include <QuickTime/ComponentDispatchHelper.c>#else #include <Components.k.h> #include <ImageCodec.k.h> #include <ComponentDispatchHelper.c>#endif// Component Open Request - Requiredpascal ComponentResult DelegateOnly_ImageCodecOpen(DelegateOnly_Globals glob, ComponentInstance self){ ComponentDescription cd = { decompressorComponentType, k422YpCbCr8CodecType, FOUR_CHAR_CODE('app3'), 0, 0 }; Component c = 0; ComponentResult rc; // Allocate memory for our globals, set them up and inform the component manager that we've done so glob = (DelegateOnly_Globals)NewPtrClear(sizeof(DelegateOnly_GlobalsRecord)); if (rc = MemError()) goto bail; SetComponentInstanceStorage(self, (Handle)glob); glob->self = self; glob->target = self; if (c = FindNextComponent(c, &cd)) { rc = OpenAComponent(c, &glob->delegateComponent); if (rc) goto bail; ComponentSetTarget(glob->delegateComponent, self); }bail: return rc;}// Component Close Request - Requiredpascal ComponentResult DelegateOnly_ImageCodecClose(DelegateOnly_Globals glob, ComponentInstance self){ // Make sure to close the component we opened and release memory if (glob) { if (glob->delegateComponent) { CloseComponent(glob->delegateComponent); } DisposePtr((Ptr)glob); } return noErr;}// Component Version Request - Requiredpascal ComponentResult DelegateOnly_ImageCodecVersion(DelegateOnly_Globals glob){#pragma unused(glob) return ((codecInterfaceVersion << 16) + kDelegateOnly_CodecVersion);}// Component Target Request// Allows another component to "target" you i.e., you call another component whenever// you would call yourself (as a result of your component being used by another component)pascal ComponentResult DelegateOnly_ImageCodecTarget(DelegateOnly_Globals glob, ComponentInstance target){ glob->target = target; return noErr;}#pragma mark-// When building the *Application Version Only* make our component available for use by applications (or other clients).// Once the Component Manager has registered a component, applications can find and open the component using standard// Component Manager routines.#if !STAND_ALONE && !TARGET_OS_WIN32void DelegateOnly_CodecRegister(void);void DelegateOnly_CodecRegister(void){ ComponentDescription td; ComponentRoutineUPP componentEntryPoint = NewComponentRoutineUPP((ComponentRoutineProcPtr)DelegateOnly_ImageCodecComponentDispatch); td.componentType = decompressorComponentType; td.componentSubType = FOUR_CHAR_CODE('DelO'); // remember to change the subType and manufacturer td.componentManufacturer = FOUR_CHAR_CODE('DTS '); // for your application - Apple reserves all lowercase types td.componentFlags = codecInfoDoes32; td.componentFlagsMask = 0; RegisterComponent(&td, componentEntryPoint, 0, NULL, NULL, NULL);}#endif // !STAND_ALONE && TARGET_OS_WIN32</pre>
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<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/DelegateOnlyComponent/listing1.html%3Fid%3DDTS10000814-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
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