/[svn]/libgig/trunk/src/RIFF.cpp
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Diff of /libgig/trunk/src/RIFF.cpp

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revision 1859 by persson, Sun Mar 8 12:24:56 2009 UTC revision 2482 by schoenebeck, Mon Nov 25 02:22:38 2013 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   libgig - C++ cross-platform Gigasampler format file access library    *   *   libgig - C++ cross-platform Gigasampler format file access library    *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003-2009 by Christian Schoenebeck                      *   *   Copyright (C) 2003-2013 by Christian Schoenebeck                      *
6   *                              <cuse@users.sourceforge.net>               *   *                              <cuse@users.sourceforge.net>               *
7   *                                                                         *   *                                                                         *
8   *   This library is free software; you can redistribute it and/or modify  *   *   This library is free software; you can redistribute it and/or modify  *
# Line 22  Line 22 
22   ***************************************************************************/   ***************************************************************************/
23    
24  #include <algorithm>  #include <algorithm>
25    #include <set>
26  #include <string.h>  #include <string.h>
27    
28  #include "RIFF.h"  #include "RIFF.h"
# Line 59  namespace RIFF { Line 60  namespace RIFF {
60          ulPos      = 0;          ulPos      = 0;
61          pParent    = NULL;          pParent    = NULL;
62          pChunkData = NULL;          pChunkData = NULL;
63            CurrentChunkSize = 0;
64            NewChunkSize = 0;
65          ulChunkDataSize = 0;          ulChunkDataSize = 0;
66          ChunkID    = CHUNK_ID_RIFF;          ChunkID    = CHUNK_ID_RIFF;
67          this->pFile = pFile;          this->pFile = pFile;
# Line 73  namespace RIFF { Line 76  namespace RIFF {
76          pParent       = Parent;          pParent       = Parent;
77          ulPos         = 0;          ulPos         = 0;
78          pChunkData    = NULL;          pChunkData    = NULL;
79            CurrentChunkSize = 0;
80            NewChunkSize = 0;
81          ulChunkDataSize = 0;          ulChunkDataSize = 0;
82          ReadHeader(StartPos);          ReadHeader(StartPos);
83      }      }
# Line 83  namespace RIFF { Line 88  namespace RIFF {
88          this->pParent    = pParent;          this->pParent    = pParent;
89          ulPos            = 0;          ulPos            = 0;
90          pChunkData       = NULL;          pChunkData       = NULL;
         ulChunkDataSize  = 0;  
91          ChunkID          = uiChunkID;          ChunkID          = uiChunkID;
92            ulChunkDataSize  = 0;
93          CurrentChunkSize = 0;          CurrentChunkSize = 0;
94          NewChunkSize     = uiBodySize;          NewChunkSize     = uiBodySize;
95      }      }
96    
97      Chunk::~Chunk() {      Chunk::~Chunk() {
98          pFile->UnlogResized(this);          if (pFile) pFile->UnlogResized(this);
99          if (pChunkData) delete[] pChunkData;          if (pChunkData) delete[] pChunkData;
100      }      }
101    
# Line 98  namespace RIFF { Line 103  namespace RIFF {
103          #if DEBUG          #if DEBUG
104          std::cout << "Chunk::Readheader(" << fPos << ") ";          std::cout << "Chunk::Readheader(" << fPos << ") ";
105          #endif // DEBUG          #endif // DEBUG
106            ChunkID = 0;
107            NewChunkSize = CurrentChunkSize = 0;
108          #if POSIX          #if POSIX
109          if (lseek(pFile->hFileRead, fPos, SEEK_SET) != -1) {          if (lseek(pFile->hFileRead, fPos, SEEK_SET) != -1) {
110              read(pFile->hFileRead, &ChunkID, 4);              read(pFile->hFileRead, &ChunkID, 4);
# Line 128  namespace RIFF { Line 135  namespace RIFF {
135              }              }
136              #if DEBUG              #if DEBUG
137              std::cout << "ckID=" << convertToString(ChunkID) << " ";              std::cout << "ckID=" << convertToString(ChunkID) << " ";
138              std::cout << "ckSize=" << ChunkSize << " ";              std::cout << "ckSize=" << CurrentChunkSize << " ";
139              std::cout << "bEndianNative=" << bEndianNative << std::endl;              std::cout << "bEndianNative=" << pFile->bEndianNative << std::endl;
140              #endif // DEBUG              #endif // DEBUG
141              NewChunkSize = CurrentChunkSize;              NewChunkSize = CurrentChunkSize;
142          }          }
# Line 225  namespace RIFF { Line 232  namespace RIFF {
232         #if DEBUG         #if DEBUG
233         std::cout << "Chunk::Remainingbytes()=" << CurrentChunkSize - ulPos << std::endl;         std::cout << "Chunk::Remainingbytes()=" << CurrentChunkSize - ulPos << std::endl;
234         #endif // DEBUG         #endif // DEBUG
235          return CurrentChunkSize - ulPos;          return (CurrentChunkSize > ulPos) ? CurrentChunkSize - ulPos : 0;
236      }      }
237    
238      /**      /**
# Line 588  namespace RIFF { Line 595  namespace RIFF {
595      }      }
596    
597      /**      /**
598         * Reads a null-padded string of size characters and copies it
599         * into the string \a s. The position within the chunk will
600         * automatically be incremented.
601         *
602         * @param s                 destination string
603         * @param size              number of characters to read
604         * @throws RIFF::Exception  if an error occured or less than
605         *                          \a size characters could be read!
606         */
607        void Chunk::ReadString(String& s, int size) {
608            char* buf = new char[size];
609            ReadSceptical(buf, 1, size);
610            s.assign(buf, std::find(buf, buf + size, '\0'));
611            delete[] buf;
612        }
613    
614        /**
615       * Writes \a WordCount number of 32 Bit unsigned integer words from the       * Writes \a WordCount number of 32 Bit unsigned integer words from the
616       * buffer pointed by \a pData to the chunk's body, directly to the       * buffer pointed by \a pData to the chunk's body, directly to the
617       * actual "physical" file. The position within the chunk will       * actual "physical" file. The position within the chunk will
# Line 854  namespace RIFF { Line 878  namespace RIFF {
878              #else              #else
879              int iBytesMoved = 1;              int iBytesMoved = 1;
880              #endif              #endif
881              for (unsigned long ulOffset = 0; iBytesMoved > 0; ulOffset += iBytesMoved, ulToMove -= iBytesMoved) {              for (unsigned long ulOffset = 0; ulToMove > 0 && iBytesMoved > 0; ulOffset += iBytesMoved, ulToMove -= iBytesMoved) {
882                  iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096;                  iBytesMoved = (ulToMove < 4096) ? ulToMove : 4096;
883                  #if POSIX                  #if POSIX
884                  lseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET);                  lseek(pFile->hFileRead, ulStartPos + ulCurrentDataOffset + ulOffset, SEEK_SET);
# Line 944  namespace RIFF { Line 968  namespace RIFF {
968        #if DEBUG        #if DEBUG
969        std::cout << "List::~List()" << std::endl;        std::cout << "List::~List()" << std::endl;
970        #endif // DEBUG        #endif // DEBUG
971            DeleteChunkList();
972        }
973    
974        void List::DeleteChunkList() {
975          if (pSubChunks) {          if (pSubChunks) {
976              ChunkList::iterator iter = pSubChunks->begin();              ChunkList::iterator iter = pSubChunks->begin();
977              ChunkList::iterator end  = pSubChunks->end();              ChunkList::iterator end  = pSubChunks->end();
# Line 952  namespace RIFF { Line 980  namespace RIFF {
980                  iter++;                  iter++;
981              }              }
982              delete pSubChunks;              delete pSubChunks;
983                pSubChunks = NULL;
984            }
985            if (pSubChunksMap) {
986                delete pSubChunksMap;
987                pSubChunksMap = NULL;
988          }          }
         if (pSubChunksMap) delete pSubChunksMap;  
989      }      }
990    
991      /**      /**
# Line 1229  namespace RIFF { Line 1261  namespace RIFF {
1261        std::cout << "List::Readheader(ulong) ";        std::cout << "List::Readheader(ulong) ";
1262        #endif // DEBUG        #endif // DEBUG
1263          Chunk::ReadHeader(fPos);          Chunk::ReadHeader(fPos);
1264            if (CurrentChunkSize < 4) return;
1265          NewChunkSize = CurrentChunkSize -= 4;          NewChunkSize = CurrentChunkSize -= 4;
1266          #if POSIX          #if POSIX
1267          lseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET);          lseek(pFile->hFileRead, fPos + CHUNK_HEADER_SIZE, SEEK_SET);
# Line 1368  namespace RIFF { Line 1401  namespace RIFF {
1401  // *************** File ***************  // *************** File ***************
1402  // *  // *
1403    
1404    //HACK: to avoid breaking DLL compatibility to older versions of libgig we roll the new std::set<Chunk*> into the old std::list<Chunk*> container, should be replaced on member variable level soon though
1405    #define _GET_RESIZED_CHUNKS() \
1406            (reinterpret_cast<std::set<Chunk*>*>(ResizedChunks.front()))
1407    
1408      /** @brief Create new RIFF file.      /** @brief Create new RIFF file.
1409       *       *
1410       * Use this constructor if you want to create a new RIFF file completely       * Use this constructor if you want to create a new RIFF file completely
# Line 1382  namespace RIFF { Line 1419  namespace RIFF {
1419       * @param FileType - four-byte identifier of the RIFF file type       * @param FileType - four-byte identifier of the RIFF file type
1420       * @see AddSubChunk(), AddSubList(), SetByteOrder()       * @see AddSubChunk(), AddSubList(), SetByteOrder()
1421       */       */
1422      File::File(uint32_t FileType) : List(this) {      File::File(uint32_t FileType) : List(this), bIsNewFile(true) {
1423            //HACK: see _GET_RESIZED_CHUNKS() comment
1424            ResizedChunks.push_back(reinterpret_cast<Chunk*>(new std::set<Chunk*>));
1425          #if defined(WIN32)          #if defined(WIN32)
1426          hFileRead = hFileWrite = INVALID_HANDLE_VALUE;          hFileRead = hFileWrite = INVALID_HANDLE_VALUE;
1427          #else          #else
# Line 1402  namespace RIFF { Line 1441  namespace RIFF {
1441       * @throws RIFF::Exception if error occured while trying to load the       * @throws RIFF::Exception if error occured while trying to load the
1442       *                         given RIFF file       *                         given RIFF file
1443       */       */
1444      File::File(const String& path) : List(this), Filename(path) {      File::File(const String& path) : List(this), Filename(path), bIsNewFile(false) {
1445        #if DEBUG         #if DEBUG
1446        std::cout << "File::File("<<path<<")" << std::endl;         std::cout << "File::File("<<path<<")" << std::endl;
1447        #endif // DEBUG         #endif // DEBUG
1448          bEndianNative = true;          try {
1449          #if POSIX              bEndianNative = true;
1450          hFileRead = hFileWrite = open(path.c_str(), O_RDONLY | O_NONBLOCK);              //HACK: see _GET_RESIZED_CHUNKS() comment
1451          if (hFileRead <= 0) {              ResizedChunks.push_back(reinterpret_cast<Chunk*>(new std::set<Chunk*>));
1452              hFileRead = hFileWrite = 0;              #if POSIX
1453              throw RIFF::Exception("Can't open \"" + path + "\"");              hFileRead = hFileWrite = open(path.c_str(), O_RDONLY | O_NONBLOCK);
1454          }              if (hFileRead <= 0) {
1455          #elif defined(WIN32)                  hFileRead = hFileWrite = 0;
1456          hFileRead = hFileWrite = CreateFile(                  throw RIFF::Exception("Can't open \"" + path + "\"");
1457                                       path.c_str(), GENERIC_READ,              }
1458                                       FILE_SHARE_READ | FILE_SHARE_WRITE,              #elif defined(WIN32)
1459                                       NULL, OPEN_EXISTING,              hFileRead = hFileWrite = CreateFile(
1460                                       FILE_ATTRIBUTE_NORMAL |                                           path.c_str(), GENERIC_READ,
1461                                       FILE_FLAG_RANDOM_ACCESS, NULL                                           FILE_SHARE_READ | FILE_SHARE_WRITE,
1462                                   );                                           NULL, OPEN_EXISTING,
1463          if (hFileRead == INVALID_HANDLE_VALUE) {                                           FILE_ATTRIBUTE_NORMAL |
1464              hFileRead = hFileWrite = INVALID_HANDLE_VALUE;                                           FILE_FLAG_RANDOM_ACCESS, NULL
1465              throw RIFF::Exception("Can't open \"" + path + "\"");                                       );
1466                if (hFileRead == INVALID_HANDLE_VALUE) {
1467                    hFileRead = hFileWrite = INVALID_HANDLE_VALUE;
1468                    throw RIFF::Exception("Can't open \"" + path + "\"");
1469                }
1470                #else
1471                hFileRead = hFileWrite = fopen(path.c_str(), "rb");
1472                if (!hFileRead) throw RIFF::Exception("Can't open \"" + path + "\"");
1473                #endif // POSIX
1474                Mode = stream_mode_read;
1475                ulStartPos = RIFF_HEADER_SIZE;
1476                ReadHeader(0);
1477                if (ChunkID != CHUNK_ID_RIFF && ChunkID != CHUNK_ID_RIFX) {
1478                    throw RIFF::Exception("Not a RIFF file");
1479                }
1480          }          }
1481          #else          catch (...) {
1482          hFileRead = hFileWrite = fopen(path.c_str(), "rb");              Cleanup();
1483          if (!hFileRead) throw RIFF::Exception("Can't open \"" + path + "\"");              throw;
         #endif // POSIX  
         Mode = stream_mode_read;  
         ulStartPos = RIFF_HEADER_SIZE;  
         ReadHeader(0);  
         if (ChunkID != CHUNK_ID_RIFF) {  
             throw RIFF::Exception("Not a RIFF file");  
1484          }          }
1485      }      }
1486    
1487      String File::GetFileName() {      String File::GetFileName() {
1488          return Filename;          return Filename;
1489      }      }
1490        
1491        void File::SetFileName(const String& path) {
1492            Filename = path;
1493        }
1494    
1495      stream_mode_t File::GetMode() {      stream_mode_t File::GetMode() {
1496          return Mode;          return Mode;
# Line 1592  namespace RIFF { Line 1643  namespace RIFF {
1643    
1644          // first we sum up all positive chunk size changes (and skip all negative ones)          // first we sum up all positive chunk size changes (and skip all negative ones)
1645          unsigned long ulPositiveSizeDiff = 0;          unsigned long ulPositiveSizeDiff = 0;
1646          for (std::set<Chunk*>::const_iterator iter = ResizedChunks.begin(), end = ResizedChunks.end(); iter != end; ++iter) {          std::set<Chunk*>* resizedChunks = _GET_RESIZED_CHUNKS();
1647            for (std::set<Chunk*>::const_iterator iter = resizedChunks->begin(), end = resizedChunks->end(); iter != end; ++iter) {
1648              if ((*iter)->GetNewSize() == 0) {              if ((*iter)->GetNewSize() == 0) {
1649                  throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(*iter));                  throw Exception("There is at least one empty chunk (zero size): " + __resolveChunkPath(*iter));
1650              }              }
# Line 1648  namespace RIFF { Line 1700  namespace RIFF {
1700          if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);          if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);
1701    
1702          // forget all resized chunks          // forget all resized chunks
1703          ResizedChunks.clear();          resizedChunks->clear();
1704      }      }
1705    
1706      /** @brief Save changes to another file.      /** @brief Save changes to another file.
# Line 1670  namespace RIFF { Line 1722  namespace RIFF {
1722          // make sure the RIFF tree is built (from the original file)          // make sure the RIFF tree is built (from the original file)
1723          LoadSubChunksRecursively();          LoadSubChunksRecursively();
1724    
1725          if (Filename.length() > 0) SetMode(stream_mode_read);          if (!bIsNewFile) SetMode(stream_mode_read);
1726          // open the other (new) file for writing and truncate it to zero size          // open the other (new) file for writing and truncate it to zero size
1727          #if POSIX          #if POSIX
1728          hFileWrite = open(path.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP);          hFileWrite = open(path.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP);
# Line 1705  namespace RIFF { Line 1757  namespace RIFF {
1757          if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);          if (ulTotalSize < ulActualSize) ResizeFile(ulTotalSize);
1758    
1759          // forget all resized chunks          // forget all resized chunks
1760          ResizedChunks.clear();          _GET_RESIZED_CHUNKS()->clear();
1761    
1762          #if POSIX          #if POSIX
1763          if (hFileWrite) close(hFileWrite);          if (hFileWrite) close(hFileWrite);
# Line 1718  namespace RIFF { Line 1770  namespace RIFF {
1770    
1771          // associate new file with this File object from now on          // associate new file with this File object from now on
1772          Filename = path;          Filename = path;
1773            bIsNewFile = false;
1774          Mode = (stream_mode_t) -1;       // Just set it to an undefined mode ...          Mode = (stream_mode_t) -1;       // Just set it to an undefined mode ...
1775          SetMode(stream_mode_read_write); // ... so SetMode() has to reopen the file handles.          SetMode(stream_mode_read_write); // ... so SetMode() has to reopen the file handles.
1776      }      }
# Line 1741  namespace RIFF { Line 1794  namespace RIFF {
1794         #if DEBUG         #if DEBUG
1795         std::cout << "File::~File()" << std::endl;         std::cout << "File::~File()" << std::endl;
1796         #endif // DEBUG         #endif // DEBUG
1797            Cleanup();
1798        }
1799        
1800        /**
1801         * Returns @c true if this file has been created new from scratch and
1802         * has not been stored to disk yet.
1803         */
1804        bool File::IsNew() const {
1805            return bIsNewFile;
1806        }
1807    
1808        void File::Cleanup() {
1809          #if POSIX          #if POSIX
1810          if (hFileRead) close(hFileRead);          if (hFileRead) close(hFileRead);
1811          #elif defined(WIN32)          #elif defined(WIN32)
# Line 1748  namespace RIFF { Line 1813  namespace RIFF {
1813          #else          #else
1814          if (hFileRead) fclose(hFileRead);          if (hFileRead) fclose(hFileRead);
1815          #endif // POSIX          #endif // POSIX
1816            DeleteChunkList();
1817            pFile = NULL;
1818            //HACK: see _GET_RESIZED_CHUNKS() comment
1819            delete _GET_RESIZED_CHUNKS();
1820      }      }
1821    
1822      void File::LogAsResized(Chunk* pResizedChunk) {      void File::LogAsResized(Chunk* pResizedChunk) {
1823          ResizedChunks.insert(pResizedChunk);          _GET_RESIZED_CHUNKS()->insert(pResizedChunk);
1824      }      }
1825    
1826      void File::UnlogResized(Chunk* pResizedChunk) {      void File::UnlogResized(Chunk* pResizedChunk) {
1827          ResizedChunks.erase(pResizedChunk);          _GET_RESIZED_CHUNKS()->erase(pResizedChunk);
1828      }      }
1829    
1830      unsigned long File::GetFileSize() {      unsigned long File::GetFileSize() {
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