我一直在尝试解析引用pdf文件上的文件的屏幕注释，但我无法以某种方式控制流。应该存在的东西，比如EmbeddedFiles数组或Dests字典不存在。我使用adobe acrobat pro 9生成pdf，与阅读器6或更高版本兼容，以避免Flash视频强制转换。
this is the test pdf I'm using.
解密这个坏男孩的代码是
CGPDFStringRef aTitle; // title is optional property.
if (!CGPDFDictionaryGetString(annotDict, "T", &aTitle)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen -> screen annot has no title");
#endif
//return;
}else {
#if DEBUG
char *screenTitle = (char*)CGPDFStringGetBytePtr(aTitle);
NSLog(@"PDFScrollView parseScreen -> screen title %s",screenTitle);
#endif
}
// get action
CGPDFDictionaryRef actionDict;
if(!CGPDFDictionaryGetDictionary(annotDict, "A", &actionDict)) {
return;
}
// parse action
const char* name;
if (!CGPDFDictionaryGetName(actionDict, "S", &name)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen -> screen annot has name attrib");
#endif
return;
}
NSString *actionType = [[NSString alloc] initWithCString:name];
if (![actionType isEqualToString:RENDITION_ACTION_TYPE]) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen -> screen annot action is not rendition");
#endif
return;
}
[actionType release];
actionType = nil;
// get the rendition from the action dictionary
CGPDFDictionaryRef renditionDict;
if (!CGPDFDictionaryGetDictionary(actionDict, "R", &renditionDict)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen -> rendition action does not have rendition");
#endif
return;
}
// check if the rendition is media or selector
const char *renditionType;
if (!CGPDFDictionaryGetName(renditionDict, "S", &renditionType)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen -> rendition does not have type");
#endif
return;
}
// check rendition type
#if DEBUG
NSLog( @"rendition type %s",renditionType);
#endif
NSString *rendTypeString = [[NSString alloc]initWithCString:renditionType];
if (![rendTypeString isEqualToString:@"MR"]) {
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->rendition type is not MR --> %s",renditionType);
#endif
return;
}
[rendTypeString release];
rendTypeString =nil;
// get media clip dictionary
CGPDFDictionaryRef mediaclipDict;
if (!CGPDFDictionaryGetDictionary(renditionDict, "C", &mediaclipDict)) {
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->rendition dictionary does not contain clip");
#endif
return;
}
const char * mediaClipType;
if (!CGPDFDictionaryGetName(mediaclipDict, "Type", &mediaClipType)) { // optional
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->media clip dictionary does not contain name");
#endif
} else {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->media clip object dictionary name %s",mediaClipType);
#endif
}
char const *mediaClipSubtype;
if (!CGPDFDictionaryGetName(mediaclipDict, "S", &mediaClipSubtype)) { // required
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->media clip dictionary does not contain name");
#endif
return;
}
NSString *mediaClipSubtypeString = [[NSString alloc] initWithCString:mediaClipSubtype];
if (![mediaClipSubtypeString isEqualToString:@"MCD"]) {
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->media clip subtype is not MCD ==>%@",mediaClipSubtype);
#endif
return;
}
[mediaClipSubtypeString release];
mediaClipSubtype = nil;
// get media clip name
CGPDFStringRef mediaClipName;
if (!CGPDFDictionaryGetString (mediaclipDict, "N", &mediaClipName)) { // optional
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->media clip dictionary does not contain name");
#endif
} else {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->media clip object dictionary name %s",mediaClipName);
#endif
}
// get ASCII MIME type
CGPDFStringRef mimeType;
if(!CGPDFDictionaryGetString(mediaclipDict, "CT", &mimeType)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->media clip object does not contain mime type");
#endif
}else {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->media clip object mime type %s",CGPDFStringGetBytePtr(mimeType));
#endif
}
// get content stream
CGPDFDictionaryRef contentDict ;
if (!CGPDFDictionaryGetDictionary(mediaclipDict, "D", &contentDict)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->media clip object does not contain content dict");
#endif
return;
}
//check content type
const char *contentType;
if (!CGPDFDictionaryGetName(contentDict, "Type", &contentType)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content dict does not have type");
#endif
}else {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content dict type %s",contentType);
#endif
}
// get file system
const char *fileSystem;
if (!CGPDFDictionaryGetName(contentDict, "FS", &fileSystem)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content dict does not have type");
#endif
}else {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content dict type %s",fileSystem );
#endif
}
#if DEBUG
CGPDFStringRef description;
if (!CGPDFDictionaryGetString (contentDict, "UF", &description)) {
NSLog(@"PDFScrollView parseScreen ->content dict does not have type");
}else {
NSLog(@"PDFSCrollView parseScreen -> contentdict UF %s",CGPDFStringGetBytePtr(description));
}
#endif
// check whether it is a file specification
if (strcmp(contentType, "Filespec")!=0) { // it is Filespec
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content dict type %s is not file specification",contentType);
#endif
return;
}
CGPDFStringRef fstring;// I get the file title
if (!CGPDFDictionaryGetString (contentDict, "F", &fstring)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content dict does not have F string");
#endif
}
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content f string %s",CGPDFStringGetBytePtr(fstring));
#endif
CGPDFStreamRef str;// here there's no stream at all
if (!CGPDFDictionaryGetStream (contentDict, "F", &str)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content dict does not have F string");
#endif
}
// reference file
CGPDFArrayRef referencedFileDict ;
/*** does not find the RF ****/
if (!CGPDFDictionaryGetArray (contentDict, "RF", &referencedFileDict)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content dict does not contain Referenced file dictionary RF");
#endif
}
CGPDFDictionaryRef embeddedFileDict ;
if (!CGPDFDictionaryGetDictionary(contentDict, "EF", &embeddedFileDict)) {
#if DEBUG
NSLog(@"PDFScrollView parseScreen ->content dict does not contain embedded file dictionary EF");
#endif
}
// EF is found sucessfully
CGPDFDictionaryRef documentCatalog = CGPDFDocumentGetCatalog(_docRef);
CGPDFDictionaryRef namesDict;
if (!CGPDFDictionaryGetDictionary (documentCatalog, "Names", &namesDict)) { // optional
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->documentCatalog does not contain Names dict");
#endif
//return;
}
CGPDFDictionaryRef destsDict;
if (!CGPDFDictionaryGetDictionary (documentCatalog, "Dests", &destsDict)) { // optional
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->documentCatalog does not contain Names dict");
#endif
//return;
}
CGPDFDictionaryRef embeddedFilesDict ;
if (!CGPDFDictionaryGetDictionary(namesDict, "EmbeddedFiles", &embeddedFilesDict)) {
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->namesDict does not contain embeddedFiles dict");
#endif
return;
}
CGPDFArrayRef namesArray;
if (!CGPDFDictionaryGetArray(namesDict, "Names", &namesArray)) {
#if DEBUG
NSLog( @"PDFScrollView parseScreen ->names Dict does not contain Names");
#endif
return;
}
此
的控制台输出2011-02-05 01:59:35.324 xxxxxxxxxx[62350:207] -> parseLink annotation subtype Screen
2011-02-05 01:59:35.325 xxxxxxxxxx[62350:207] parseScreen -> screen title Annotation from Inception_HD.avi
2011-02-05 01:59:35.325 xxxxxxxxxx[62350:207] rendition type MR
2011-02-05 01:59:35.326 xxxxxxxxxx[62350:207] parseScreen ->media clip dictionary does not contain name
2011-02-05 01:59:35.327 xxxxxxxxxx[62350:207] parseScreen ->media clip object dictionary name
2011-02-05 01:59:35.327 xxxxxxxxxx[62350:207] parseScreen ->media clip object mime type video/avi
Current language: auto; currently objective-c
2011-02-05 01:59:39.080 xxxxxxxxxx[62350:207] parseScreen ->content dict type Filespec
2011-02-05 01:59:40.206 xxxxxxxxxx[62350:207] parseScreen ->content dict does not have type
2011-02-05 01:59:41.647 xxxxxxxxxx[62350:207] parseScreen -> contentdict UF Inception_HD.avi
2011-02-05 01:59:44.234 xxxxxxxxxx[62350:207] parseScreen ->content f string Inception_HD.avi
2011-02-05 01:59:45.472 xxxxxxxxxx[62350:207] parseScreen ->content dict does not have F string
2011-02-05 01:59:47.772 xxxxxxxxxx[62350:207] parseScreen ->content dict does not contain Referenced file dictionary RF
(gdb) continue
2011-02-05 03:33:13.748 xxxxxxxxxx[62350:207] parseScreen ->documentCatalog does not contain Names dict
我的想法是获取文件流，将其保存到临时文件，然后像adobe devs那样使用adobe SDK进行播放。
提前致谢
答案 0 :(得分：0)
我最终在除PDF文件之外的其他文件上打包媒体。我无法使用Apple Quartz库控制pdf上的流数据。