2 // filethread.cpp - File discovery thread
5 // (C) 2010 Underground Software
7 // JLH = James Hammons <jlhamm@acm.org>
10 // --- ---------- -------------------------------------------------------------
11 // JLH 01/28/2010 Created this file
12 // JLH 02/16/2010 Moved RomIdentifier stuff to its own file
13 // JLH 03/02/2010 Added .ZIP file fishing
14 // JLH 06/28/2011 Cleanup in the file parsing/fishing code, to make it easier
15 // to follow the flow of the logic
18 #include "filethread.h"
27 #define VERBOSE_LOGGING
29 FileThread::FileThread(QObject * parent/*= 0*/): QThread(parent), abort(false)
33 FileThread::~FileThread()
43 void FileThread::Go(bool allowUnknown/*= false*/)
45 allowUnknownSoftware = allowUnknown;
46 QMutexLocker locker(&mutex);
51 Our strategy here is like so:
52 Look at the files in the directory pointed to by ROMPath.
53 For each file in the directory, take the CRC32 of it and compare it to the CRC
54 in the romList[]. If there's a match, put it in a list and note it's index value
55 in romList for future reference.
57 When constructing the list, use the index to pull up an image of the cart and
58 put that in the list. User picks from a graphical image of the cart.
60 Ideally, the label will go into the archive along with the ROM image, but that's
62 Maybe box art, screenshots will go as well...
63 The future is NOW! :-)
67 // Here's the thread's actual execution path...
69 void FileThread::run(void)
71 QDir romDir(vjs.ROMPath);
72 QFileInfoList list = romDir.entryInfoList();
74 for(int i=0; i<list.size(); i++)
77 #ifdef VERBOSE_LOGGING
79 printf("FileThread: Aborting!!!\n");
82 #ifdef VERBOSE_LOGGING
86 HandleFile(list.at(i));
91 // This handles file identification and ZIP extraction.
93 void FileThread::HandleFile(QFileInfo fileInfo)
95 // Really, need to come up with some kind of cacheing scheme here, so we don't
96 // fish through these files every time we run VJ :-P
97 #warning "!!! Need to come up with some kind of cacheing scheme here !!!"
98 bool haveZIPFile = (fileInfo.suffix().compare("zip", Qt::CaseInsensitive) == 0
100 uint32_t fileSize = 0;
101 uint8_t * buffer = NULL;
105 // ZIP files are special: They contain more than just the software now... ;-)
106 // So now we fish around inside them to pull out the stuff we want.
107 // Probably also need more stringent error checking as well... :-O
108 fileSize = GetFileFromZIP(fileInfo.filePath().toAscii(), FT_SOFTWARE, buffer);
115 QFile file(fileInfo.filePath());
117 if (!file.open(QIODevice::ReadOnly))
120 fileSize = fileInfo.size();
125 buffer = new uint8_t[fileSize];
126 file.read((char *)buffer, fileSize);
130 // Try to divine the file type by size & header
131 int fileType = ParseFileType(buffer, fileSize);
133 // Check for Alpine ROM w/Universal Header
134 bool foundUniversalHeader = HasUniversalHeader(buffer, fileSize);
137 //printf("FileThread: About to calc checksum on file with size %u... (buffer=%08X)\n", size, buffer);
138 if (foundUniversalHeader)
139 crc = crc32_calcCheckSum(buffer + 8192, fileSize - 8192);
141 crc = crc32_calcCheckSum(buffer, fileSize);
143 uint32_t index = FindCRCIndexInFileList(crc);
146 // Here we filter out files that are *not* in the DB and of unknown type,
147 // and BIOS files. If desired, this can be overriden with a config option.
148 if ((index == 0xFFFFFFFF) && (fileType == JST_NONE))
150 // If we allow unknown software, we pass the (-1) index on, otherwise...
151 if (!allowUnknownSoftware)
152 return; // CRC wasn't found, so bail...
154 else if ((index != 0xFFFFFFFF) && romList[index].flags & FF_BIOS)
157 //Here's a little problem. When we create the image here and pass it off to FilePicker,
158 //we can clobber this image before we have a chance to copy it out in the FilePicker function
159 //because we can be back here before FilePicker can respond.
160 // So now we create the image on the heap, problem solved. :-)
163 // See if we can fish out a label. :-)
166 uint32_t size = GetFileFromZIP(fileInfo.filePath().toAscii(), FT_LABEL, buffer);
167 //printf("FT: Label size = %u bytes.\n", size);
172 bool successful = label.loadFromData(buffer, size);
174 *img = label.scaled(365, 168, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
175 //printf("FT: Label %s: %ux%u.\n", (successful ? "succeeded" : "did not succeed"), img->width(), img->height());
178 //printf("FileThread: Attempted to load image. Size: %u x %u...\n", img.width(), img.height());
181 // emit FoundAFile2(index, fileInfo.canonicalFilePath(), img, fileSize);
182 emit FoundAFile3(index, fileInfo.canonicalFilePath(), img, fileSize, foundUniversalHeader, fileType, crc);
186 // Find a CRC in the ROM list (simple brute force algorithm).
187 // If it's there, return the index, otherwise return $FFFFFFFF
189 uint32_t FileThread::FindCRCIndexInFileList(uint32_t crc)
191 // Instead of a simple brute-force search, we should probably do a binary
192 // partition search instead, since the CRCs are sorted numerically.
193 #warning "!!! Should do binary partition search here !!!"
194 for(int i=0; romList[i].crc32!=0xFFFFFFFF; i++)
196 if (romList[i].crc32 == crc)