/[svn]/libgig/trunk/src/RIFF.h
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revision 11 by schoenebeck, Sun Nov 16 17:47:00 2003 UTC revision 798 by schoenebeck, Thu Nov 3 23:49:11 2005 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   libgig - C++ cross-platform Gigasampler format file loader library    *   *   libgig - C++ cross-platform Gigasampler format file loader library    *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003 by Christian Schoenebeck                           *   *   Copyright (C) 2003-2005 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  *
9   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 72  namespace RIFF { Line 72  namespace RIFF {
72      /* just symbol prototyping */      /* just symbol prototyping */
73      class Chunk;      class Chunk;
74      class List;      class List;
75        class File;
76    
77      typedef std::string String;      typedef std::string String;
78    
79        /** Whether file stream is open in read or in read/write mode. */
80        typedef enum {
81            stream_mode_read       = 0,
82            stream_mode_read_write = 1,
83            stream_mode_closed     = 2
84        } stream_mode_t;
85    
86      /** Current state of the file stream. */      /** Current state of the file stream. */
87      typedef enum {      typedef enum {
88          stream_ready       = 0,          stream_ready       = 0,
# Line 93  namespace RIFF { Line 101  namespace RIFF {
101      /** Provides convenient methods to access data of RIFF chunks in general. */      /** Provides convenient methods to access data of RIFF chunks in general. */
102      class Chunk {      class Chunk {
103          public:          public:
104              #if POSIX              Chunk(File* pFile, unsigned long StartPos, List* Parent);
             Chunk(int hFile, unsigned long StartPos, bool EndianNative, List* Parent);  
             #else  
             Chunk(FILE* hFile, unsigned long StartPos, bool EndianNative, List* Parent);  
             #endif // POSIX  
105              String         GetChunkIDString();              String         GetChunkIDString();
106              uint32_t       GetChunkID() { return ChunkID; };            ///< Chunk ID in unsigned integer representation.              uint32_t       GetChunkID() { return ChunkID; };            ///< Chunk ID in unsigned integer representation.
107              List*          GetParent()  { return pParent; };            ///< Returns pointer to the chunk's parent list chunk.              List*          GetParent()  { return pParent; };            ///< Returns pointer to the chunk's parent list chunk.
108              unsigned long  GetSize()    { return ChunkSize; };          ///< Chunk size in bytes (without header, thus the chunk data body)              unsigned long  GetSize()    { return CurrentChunkSize; };   ///< Chunk size in bytes (without header, thus the chunk data body)
109                unsigned long  GetNewSize() { return NewChunkSize;     };   ///< New chunk size if it was modified with Resize().
110              unsigned long  GetPos()     { return ulPos; };              ///< Position within the chunk data body              unsigned long  GetPos()     { return ulPos; };              ///< Position within the chunk data body
111              unsigned long  GetFilePos() { return ulStartPos + ulPos; }; ///< Current, actual offset in file.              unsigned long  GetFilePos() { return ulStartPos + ulPos; }; ///< Current, actual offset in file.
112              unsigned long  SetPos(unsigned long Where, stream_whence_t Whence = stream_start);              unsigned long  SetPos(unsigned long Where, stream_whence_t Whence = stream_start);
# Line 120  namespace RIFF { Line 125  namespace RIFF {
125              uint16_t       ReadUint16();              uint16_t       ReadUint16();
126              int32_t        ReadInt32();              int32_t        ReadInt32();
127              uint32_t       ReadUint32();              uint32_t       ReadUint32();
128              void*          LoadChunkData();     ///< Load the whole chunk body in memory (on success returns a pointer to the data in RAM, else NULL).              unsigned long  Write(void* pData, unsigned long WordCount, unsigned long WordSize);
129              void           ReleaseChunkData();  ///< Free loaded chunk body data from memory (RAM).              unsigned long  WriteInt8(int8_t* pData,     unsigned long WordCount = 1);
130             ~Chunk();              unsigned long  WriteUint8(uint8_t* pData,   unsigned long WordCount = 1);
131                unsigned long  WriteInt16(int16_t* pData,   unsigned long WordCount = 1);
132                unsigned long  WriteUint16(uint16_t* pData, unsigned long WordCount = 1);
133                unsigned long  WriteInt32(int32_t* pData,   unsigned long WordCount = 1);
134                unsigned long  WriteUint32(uint32_t* pData, unsigned long WordCount = 1);
135                void*          LoadChunkData();
136                void           ReleaseChunkData();
137                void           Resize(int iNewSize);
138                virtual ~Chunk();
139          protected:          protected:
140              uint32_t      ChunkID;              uint32_t      ChunkID;
141              uint32_t      ChunkSize;            /* in bytes */              uint32_t      CurrentChunkSize;             /* in bytes */
142                uint32_t      NewChunkSize;                 /* in bytes (if chunk was scheduled to be resized) */
143              List*         pParent;              List*         pParent;
144              #if POSIX              File*         pFile;
             int           hFile;  
             #else  
             FILE*         hFile;  
             #endif // POSIX  
145              unsigned long ulStartPos;           /* actual position in file where chunk (without header) starts */              unsigned long ulStartPos;           /* actual position in file where chunk (without header) starts */
146              unsigned long ulPos;                /* # of bytes from ulStartPos */              unsigned long ulPos;                /* # of bytes from ulStartPos */
             bool          bEndianNative;  
147              uint8_t*      pChunkData;              uint8_t*      pChunkData;
148    
149              Chunk();              Chunk(File* pFile);
150                Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize);
151              void          ReadHeader(unsigned long fPos);              void          ReadHeader(unsigned long fPos);
152                void          WriteHeader(unsigned long fPos);
153              unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize);              unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize);
154              inline void   swapBytes_16(void* Word) {              inline void   swapBytes_16(void* Word) {
155                  uint8_t byteCache = *((uint8_t*) Word);                  uint8_t byteCache = *((uint8_t*) Word);
# Line 171  namespace RIFF { Line 182  namespace RIFF {
182                  }                  }
183                  return result;                  return result;
184              }              }
185                virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
186                virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.
187    
188                friend class List;
189      };      };
190    
191      /** Provides convenient methods to access data of RIFF list chunks and their subchunks. */      /** Provides convenient methods to access data of RIFF list chunks and their subchunks. */
192      class List : public Chunk {      class List : public Chunk {
193          public:          public:
194              #if POSIX              List(File* pFile, unsigned long StartPos, List* Parent);
             List(int hFile, unsigned long StartPos, bool EndianNative, List* Parent);  
             #else  
             List(FILE* hFile, unsigned long StartPos, bool EndianNative, List* Parent);  
             #endif // POSIX  
195              String       GetListTypeString();              String       GetListTypeString();
196              uint32_t     GetListType() { return ListType; }   ///< Returns unsigned integer representation of the list's ID              uint32_t     GetListType() { return ListType; }   ///< Returns unsigned integer representation of the list's ID
197              Chunk*       GetSubChunk(uint32_t ChunkID);              Chunk*       GetSubChunk(uint32_t ChunkID);
# Line 193  namespace RIFF { Line 204  namespace RIFF {
204              unsigned int CountSubChunks(uint32_t ChunkID);              unsigned int CountSubChunks(uint32_t ChunkID);
205              unsigned int CountSubLists();              unsigned int CountSubLists();
206              unsigned int CountSubLists(uint32_t ListType);              unsigned int CountSubLists(uint32_t ListType);
207             ~List();              Chunk*       AddSubChunk(uint32_t uiChunkID, uint uiBodySize);
208                List*        AddSubList(uint32_t uiListType);
209                void         DeleteSubChunk(Chunk* pSubChunk);
210                virtual ~List();
211          protected:          protected:
212              typedef std::map<uint32_t, RIFF::Chunk*>  ChunkMap;              typedef std::map<uint32_t, RIFF::Chunk*>  ChunkMap;
213              typedef std::list<Chunk*>                 ChunkList;              typedef std::list<Chunk*>                 ChunkList;
# Line 204  namespace RIFF { Line 218  namespace RIFF {
218              ChunkList::iterator ChunksIterator;              ChunkList::iterator ChunksIterator;
219              ChunkList::iterator ListIterator;              ChunkList::iterator ListIterator;
220    
221              List();              List(File* pFile);
222                List(File* pFile, List* pParent, uint32_t uiListID);
223              void ReadHeader(unsigned long fPos);              void ReadHeader(unsigned long fPos);
224                void WriteHeader(unsigned long fPos);
225              void LoadSubChunks();              void LoadSubChunks();
226                virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
227                virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
228      };      };
229    
230      /** Parses arbitrary RIFF files and provides together with it's base classes convenient methods to walk through the RIFF tree. */      /** Parses arbitrary RIFF files and provides together with it's base classes convenient methods to walk through the RIFF tree. */
231      class File : public List {      class File : public List {
232          public:          public:
233                File(uint32_t FileType);
234              File(const String& path);              File(const String& path);
235             ~File();              stream_mode_t GetMode();
236                bool          SetMode(stream_mode_t NewMode);
237                String GetFileName();
238                virtual void Save();
239                virtual void Save(const String& path);
240                virtual ~File();
241            protected:
242                #if POSIX
243                int    hFileRead;  ///< handle / descriptor for reading from file
244                int    hFileWrite; ///< handle / descriptor for writing to (some) file
245                #else
246                FILE*  hFileRead;  ///< handle / descriptor for reading from file
247                FILE*  hFileWrite; ///< handle / descriptor for writing to (some) file
248                #endif // POSIX
249                String Filename;
250                bool   bEndianNative;
251    
252                void LogAsResized(Chunk* pResizedChunk);
253                friend class Chunk;
254                friend class List;
255          private:          private:
256                stream_mode_t  Mode;
257                ChunkList      ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).
258    
259              unsigned long GetFileSize();              unsigned long GetFileSize();
260                void ResizeFile(unsigned long ulNewSize);
261                #if POSIX
262                unsigned long __GetFileSize(int hFile);
263                #else
264                unsigned long __GetFileSize(FILE* hFile);
265                #endif
266      };      };
267    
268      /** Will be thrown whenever an error occurs while parsing a RIFF file. */      /** Will be thrown whenever an error occurs while parsing a RIFF file. */
# Line 228  namespace RIFF { Line 275  namespace RIFF {
275              virtual ~Exception() {};              virtual ~Exception() {};
276      };      };
277    
278        String libraryName();
279        String libraryVersion();
280    
281  } // namespace RIFF  } // namespace RIFF
282  #endif // __RIFF_H__  #endif // __RIFF_H__
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