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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
<!-- END META TAG INFO -->
<!-- BEGIN TITLE -->
<title>QTMetadataEditor - /MetadataAttributeMO.m</title>
<!-- END TITLE -->
<script language="JavaScript">
function JumpToNewPage() {
window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
<!-- BEGIN BODY OPEN -->
<body>
<!--END BODY OPEN -->
<!-- START CENTER OPEN -->
<center>
<!-- END CENTER OPEN -->
<!-- BEGIN LOGO AND SEARCH -->
<!--#include virtual="/includes/adcnavbar"-->
<!-- END LOGO AND SEARCH -->
<!-- START BREADCRUMB -->
<div id="breadcrumb">
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<tr valign="middle">
<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html#//apple_ref/doc/uid/TP30000943" target="_top">Reference Library</a> > <a href="../index.html#//apple_ref/doc/uid/TP30000925" target="_top">Sample Code</a> > <a href="../QuickTime/index.html#//apple_ref/doc/uid/TP30000925-TP30000433" target="_top">QuickTime</a> > <a href="../QuickTime/idxMovieInternals-date.html#//apple_ref/doc/uid/TP30000925-TP30000433-TP30000546">Movie Internals</a> > <A HREF="javascript:location.replace('index.html');">QTMetadataEditor</A> >
</td>
</tr>
<tr>
<td colspan="2" scope="row"><img width="680" height="35" src="images/1dot.gif" alt=""></td>
</tr>
</table>
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<!-- START MAIN CONTENT -->
<!-- START TITLE GRAPHIC AND INTRO-->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">QTMetadataEditor</div></h1></td>
</tr>
</table>
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<tr align="left" valign="top">
<td id="scdetails">
<h2>/MetadataAttributeMO.m</h2>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/CDMBAppDelegate.h</option>
<option value="listing2.html">/CDMBAppDelegate.m</option>
<option value="listing3.html">/EditMetadataController.h</option>
<option value="listing4.html">/EditMetadataController.m</option>
<option value="listing5.html">/main.m</option>
<option value="listing6.html">/MetadataAttributeMO.h</option>
<option value="listing7.html">/MetadataAttributeMO.m</option>
<option value="listing8.html">/MovieDocument.h</option>
<option value="listing9.html">/MovieDocument.mm</option>
<option value="listing10.html">/MyDocument.h</option>
<option value="listing11.html">/MyDocument.m</option>
<option value="listing12.html">/MySplitViewWithDropSupport.h</option>
<option value="listing13.html">/MySplitViewWithDropSupport.m</option>
<option value="listing14.html">/MyValueFormatter.h</option>
<option value="listing15.html">/MyValueFormatter.m</option>
<option value="listing16.html">/QTMetadataEditor_Prefix.pch</option>
<option value="listing17.html">/README.txt</option>
<option value="listing18.html">/xcPROJECTNAMExc_Prefix.pch</option></select>
</p>
</form>
<p><strong><a href="QTMetadataEditor.zip">Download Sample</a></strong> (“QTMetadataEditor.zip”, 159.0K)<BR>
<strong><a href="QTMetadataEditor.dmg">Download Sample</a></strong> (“QTMetadataEditor.dmg”, 156.8K)</p>
<!--
<p><strong><a href="#">Download Sample</a></strong> (“filename.sit”, 500K)</p>
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<!--googleon: index -->
<pre class="sourcecodebox">//
// File: MetadataAttributeMO.m
//
// Abstract: The NSManagedObject subclass for the CDMetadataBrowser's metadata objects.
// Allows for getting string representations of the various types of metadata,
// creating and editing these objects as well as updating the inspector view.
//
// Version: 1.0
// Originally introducted at WWDC 2008 at Session:
// Extending and Integrating Post-Production Applications with Final Cut Pro
//
// Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple 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 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.
//
// Copyright ( C ) 2008 Apple Inc. All Rights Reserved.
//
#import "MetadataAttributeMO.h"
#import "Quicktime/Movies.h"
unsigned charTo4Bits(char c);
@implementation MetadataAttributeMO
#pragma mark utility functions for HEX view of data
+ (NSString *)hexStringFromData:(NSData*) dataValue forEdit:(BOOL)forEdit{
UInt32 byteLength = [dataValue length], byteCounter = 0;
UInt32 stringLength = (byteLength*2) + 1, stringCounter = 0;
UInt32 numSpacesToAdd = (forEdit?0:(stringLength/4));
unsigned char dstBuffer[stringLength+numSpacesToAdd];
unsigned char srcBuffer[byteLength];
unsigned char *srcPtr = srcBuffer;
[dataValue getBytes:srcBuffer];
const unsigned char t[16] = "0123456789ABCDEF";
for (;byteCounter < byteLength; byteCounter++){
unsigned src = *srcPtr;
dstBuffer[stringCounter++] = t[src>>4];
dstBuffer[stringCounter++] = t[src & 15];
if (!forEdit && (byteCounter%2)==1){
dstBuffer[stringCounter++] = ' ';
}
srcPtr++;
}
dstBuffer[stringCounter] = '\0';
return [NSString stringWithUTF8String:(char*)dstBuffer];
}
+ (NSData *)dataFromHexString:(NSString*) dataValue{
UInt32 stringLength = [dataValue length];
UInt32 byteLength = stringLength/2;
UInt32 byteCounter = 0;
char srcBuffer[stringLength];
[dataValue getCString:srcBuffer maxLength:stringLength encoding:NSASCIIStringEncoding];
char *srcPtr = srcBuffer;
Byte dstBuffer[byteLength];
Byte *dst = dstBuffer;
for(;byteCounter < byteLength;){
char c = *srcPtr++;
char d = *srcPtr++;
unsigned hi = 0, lo = 0;
hi = charTo4Bits(c);
lo = charTo4Bits(d);
if (hi== 255 || lo == 255){
//errorCase
return nil;
}
dstBuffer[byteCounter++] = ((hi << 4) | lo);
}
return [NSData dataWithBytes:dst length:byteLength];
}
#pragma mark empty entry support
+ (id)defaultValueForType:(UInt32)dataType
{
id data = nil;
switch(dataType){
case kQTMetaDataTypeBinary:
case kQTMetaDataTypeJPEGImage:
case kQTMetaDataTypePNGImage:
case kQTMetaDataTypeBMPImage:
{
const Byte dstBuffer[4] = {0xde, 0xad, 0xbe, 0xef};
data = [NSData dataWithBytes:dstBuffer length:4];
}
break;
case kQTMetaDataTypeUTF8:
case kQTMetaDataTypeUTF16BE:
case kQTMetaDataTypeMacEncodedText:
data = [NSString stringWithString:@"your data"];
break;
case kQTMetaDataTypeSignedIntegerBE:
case kQTMetaDataTypeUnsignedIntegerBE:
case kQTMetaDataTypeFloat32BE:
case kQTMetaDataTypeFloat64BE:
data = [NSNumber numberWithBool:FALSE];
break;
default:
NSLog(@"unknownKeyType, returning Bin as storage location");
data = nil;
}
return data;
}
- (void)awakeFromInsert
{
//put in some default values
[self setValue:[NSString stringWithString:@"com.company.data.metadataname"] forKey:@"name"];
[self setValue:[NSNumber numberWithLong:(kQTMetaDataTypeUTF8)] forKey:@"type"];
[self setValue:[MetadataAttributeMO defaultValueForType:kQTMetaDataTypeUTF8] forKey:@"dataString"];
}
#pragma mark mapping to/from QT data types
// since we can't put all the various datatypes into 'data' since it needs a specific type,
// we need to see what we're storing to know where to put it/get it.
+ (NSString *)dataKeyForType:(UInt32)dataType
{
NSString* dataKey = nil;
switch(dataType){
case kQTMetaDataTypeBinary:
case kQTMetaDataTypeJPEGImage:
case kQTMetaDataTypePNGImage:
case kQTMetaDataTypeBMPImage:
dataKey = [NSString stringWithString:@"dataBin"];
break;
case kQTMetaDataTypeUTF8:
case kQTMetaDataTypeUTF16BE:
case kQTMetaDataTypeMacEncodedText:
dataKey = [NSString stringWithString:@"dataString"];
break;
case kQTMetaDataTypeSignedIntegerBE:
case kQTMetaDataTypeUnsignedIntegerBE:
dataKey = [NSString stringWithString:@"dataInt64"];
break;
case kQTMetaDataTypeFloat32BE:
dataKey = [NSString stringWithString:@"dataFloat32"];
break;
case kQTMetaDataTypeFloat64BE:
dataKey = [NSString stringWithString:@"dataFloat64"];
break;
default:
NSLog(@"unknownKeyType, returning Bin as storage location");
dataKey = [NSString stringWithString:@"dataBin"];
}
return dataKey;
}
// since we can't put all the various datatypes into 'data' since it needs a specific type,
// we need to see what we're storing to know where to put it/get it.
- (void)setDataForString:(NSString*)stringValue
{
id dataValue = nil;
UInt32 dataType = [[self valueForKey:@"type"] intValue];
switch(dataType){
case kQTMetaDataTypeBinary:
case kQTMetaDataTypeJPEGImage:
case kQTMetaDataTypePNGImage:
case kQTMetaDataTypeBMPImage:
dataValue = [MetadataAttributeMO dataFromHexString:stringValue];
break;
case kQTMetaDataTypeUTF8:
case kQTMetaDataTypeUTF16BE:
case kQTMetaDataTypeMacEncodedText:
dataValue = [NSString stringWithString:stringValue];
break;
case kQTMetaDataTypeSignedIntegerBE:
case kQTMetaDataTypeUnsignedIntegerBE:
dataValue = [NSNumber numberWithInt:[stringValue intValue]];
break;
case kQTMetaDataTypeFloat32BE:
case kQTMetaDataTypeFloat64BE:
dataValue = [NSNumber numberWithInt:[stringValue doubleValue]];
break;
default:
NSLog(@"unknown key type in setDataForString");
}
if (dataValue != nil)
[self setValue:dataValue forKey:[MetadataAttributeMO dataKeyForType:dataType]];
}
// map from the QT metadata types to the UI value types.
- (void)setControlwithData:(NSControl *)myValueInspectorView forEdit:(BOOL)forEdit{
id dataValue = [self valueForKey:@"data"];
UInt32 dataType = [[self valueForKey:@"type"] intValue];
switch(dataType){
case kQTMetaDataTypeBinary:
case kQTMetaDataTypeJPEGImage:
case kQTMetaDataTypePNGImage:
case kQTMetaDataTypeBMPImage:
[myValueInspectorView setStringValue: @" "];
[myValueInspectorView setStringValue:[MetadataAttributeMO hexStringFromData:dataValue forEdit:forEdit]];
break;
case kQTMetaDataTypeUTF8:
case kQTMetaDataTypeUTF16BE:
case kQTMetaDataTypeMacEncodedText:
[myValueInspectorView setStringValue:dataValue];
break;
case kQTMetaDataTypeSignedIntegerBE:
case kQTMetaDataTypeUnsignedIntegerBE:
[myValueInspectorView setIntValue:[dataValue intValue]];
break;
case kQTMetaDataTypeFloat32BE:
[myValueInspectorView setFloatValue:[dataValue floatValue]];
break;
case kQTMetaDataTypeFloat64BE:
[myValueInspectorView setDoubleValue:[dataValue doubleValue]];
break;
default:
NSLog(@"unknown key type in setControlwithData");
}
}
- (id)valueForUndefinedKey:(NSString *)key
{ // KVC - overridden to access generic dictionary storage unless subclasses explicitly provide accessors
// since we are storing the different data values as 'dataBin' or 'dataString' depending on what type it is (you can't leave it undefined)
// we need a generic way to retreive and store it, so we let accessors get and set with 'data' and we route that to the right place.
// Leveraging the 'type' value, we can calculate the name of the key for the data.
id returnValue = nil;
if ([key compare:@"data"] == NSOrderedSame){
UInt32 dataType = [[self valueForKey:@"type"] intValue];
returnValue = [self valueForKey:[MetadataAttributeMO dataKeyForType:dataType]];
//EXERCISE: we should probably clear out all the other @"data--" keys rather than just leaving them...
}
if (returnValue == nil)
returnValue = [super valueForUndefinedKey:key];
return returnValue;
}
- (void)setValue:(id)value forUndefinedKey:(NSString *)key
{ // KVC - overridden to access generic dictionary storage unless subclasses explicitly provide accessors
// since we are storing the different data values as 'dataBin' or 'dataString' depending on what type it is (you can't leave it undefined)
// we need a generic way to retreive and store it, so we let accessors get and set with 'data' and we route that to the right place.
// Leveraging the 'type' value, we can calculate the name of the key for the data.
if ([key compare:@"data"] == NSOrderedSame){
UInt32 dataType = [[self valueForKey:@"type"] intValue];
[self setValue:value forKey:[MetadataAttributeMO dataKeyForType:dataType]];
}
}
- (void)setValue:(id)value forKey:(NSString *)key
{ // KVC - overridden to access generic dictionary storage unless subclasses explicitly provide accessors
// since we are storing the different data values under different keys depending on the type,
// when the type changes the value also has to change. make sure we set it to a default so the ui doesn't freak out.
if ([key compare:@"type"] == NSOrderedSame){
UInt32 dataType = [value intValue];
NSString * dataKey = [MetadataAttributeMO dataKeyForType:dataType];
id oldValue = [super valueForKey:dataKey];
if (oldValue == nil)
[self setValue:[MetadataAttributeMO defaultValueForType:dataType] forKey:dataKey];
[self didChangeValueForKey:dataKey]; // KVO - change notification
}
[super setValue:value forKey:key];
}
#pragma mark copy/paste support
- (NSArray *)copyKeys {
static NSArray *copyKeys = nil;
if (copyKeys == nil) {
UInt32 dataType = [[self valueForKey:@"type"] intValue];
copyKeys = [[NSArray alloc] initWithObjects:
@"name", @"type", [MetadataAttributeMO dataKeyForType:dataType], nil];
}
return copyKeys;
}
- (NSDictionary *)dictionaryRepresentation
{
return [self dictionaryWithValuesForKeys:[self copyKeys]];
}
- (NSString *)stringDescription
{
NSString *stringDescription = [self valueForKey:@"name"];
NSString *dataString = @"";
id data = [self valueForKey:@"data"];
if (data != nil) {
dataString = [data description];
}
stringDescription = [stringDescription stringByAppendingFormat:
@" = %@", dataString];
return stringDescription;
}
#pragma mark drag/drop support
- (BOOL)supportsBinaryFileDrop{
UInt32 dataType = [[self valueForKey:@"type"] intValue];
switch(dataType){
case kQTMetaDataTypeBinary:
case kQTMetaDataTypeJPEGImage:
case kQTMetaDataTypePNGImage:
case kQTMetaDataTypeBMPImage:
return YES;
default:
return NO;
}
}
@end
unsigned charTo4Bits(char c){
unsigned bits = 0;
if (c > '/' && c<':'){
bits = c - '0';
} else if (c > '@' && c < 'G'){
bits = (c- 'A') + 10;
} else if (c > '`' && c < 'g'){
bits = (c- 'a') + 10;
} else {
bits = 255;
}
return bits;
}
</pre>
<!--googleoff: index -->
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<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/QTMetadataEditor/listing7.html%3Fid%3DDTS40007652-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
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