/[svn]/libgig/trunk/src/RIFF.h
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revision 1095 by schoenebeck, Mon Mar 12 18:16:55 2007 UTC revision 1953 by schoenebeck, Thu Jul 30 08:16:02 2009 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) 2003-2007 by Christian Schoenebeck                      *   *   Copyright (C) 2003-2009 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 52  Line 52 
52  # include <unistd.h>  # include <unistd.h>
53  #endif // POSIX  #endif // POSIX
54    
55    #ifdef _MSC_VER
56    // Visual C++ 2008 doesn't have stdint.h
57    typedef __int8 int8_t;
58    typedef __int16 int16_t;
59    typedef __int32 int32_t;
60    typedef __int64 int64_t;
61    typedef unsigned __int8 uint8_t;
62    typedef unsigned __int16 uint16_t;
63    typedef unsigned __int32 uint32_t;
64    typedef unsigned __int64 uint64_t;
65    #else
66  #include <stdint.h>  #include <stdint.h>
67    #endif
68    
69  #ifdef WIN32  #ifdef WIN32
 # include "../win32/libgig_private.h" // like config.h, automatically generated by Dev-C++  
70  # include <windows.h>  # include <windows.h>
71    typedef unsigned int   uint;    typedef unsigned int   uint;
   typedef unsigned char  uint8_t;  
   typedef unsigned short uint16_t;  
   typedef unsigned int   uint32_t;  
 # define PACKAGE "libgig"  
 # define VERSION VER_STRING // VER_STRING defined in libgig_private.h  
72  #endif // WIN32  #endif // WIN32
73    
74  #include <stdio.h>  #include <stdio.h>
# Line 82  Line 88 
88  #define RIFF_HEADER_SIZE        12  #define RIFF_HEADER_SIZE        12
89    
90    
91  /** RIFF specific classes and definitions */  /**
92     * @brief RIFF specific classes and definitions
93     *
94     * The Resource Interchange File Format (RIFF) is a generic tree-structured
95     * meta-format which stores data in so called "chunks". It can be compared
96     * to XML, but in contrast to XML, RIFF is entirely binary encoded, that is
97     * not ASCII based. RIFF is used as basis for many file formats like AVI,
98     * WAV, DLS and of course the Gigasampler file format. ;-)
99     *
100     * RIFF chunks can be seen as containers for data. There are two distinct
101     * types of chunks:
102     *
103     * - @e ordinary @e chunks are the leafs of the data tree which encapsulate
104     *   the actual data of the file (i.e. the sample data of a .wav file)
105     *
106     * - @e list @e chunks are the nodes of the data tree which hold an
107     *   arbitrary amount of subchunks (can be both, list chunks and/or ordinary
108     *   chunks)
109     */
110  namespace RIFF {  namespace RIFF {
111    
112      /* just symbol prototyping */      /* just symbol prototyping */
# Line 114  namespace RIFF { Line 138  namespace RIFF {
138          stream_end      = 3          stream_end      = 3
139      } stream_whence_t;      } stream_whence_t;
140    
141      /** Provides convenient methods to access data of RIFF chunks in general. */      /** Alignment of data bytes in memory (system dependant). */
142        typedef enum {
143            endian_little = 0,
144            endian_big    = 1,
145            endian_native = 2
146        } endian_t;
147    
148        /** @brief Ordinary RIFF Chunk
149         *
150         * Provides convenient methods to access data of ordinary RIFF chunks
151         * in general.
152         */
153      class Chunk {      class Chunk {
154          public:          public:
155              Chunk(File* pFile, unsigned long StartPos, List* Parent);              Chunk(File* pFile, unsigned long StartPos, List* Parent);
156              String         GetChunkIDString();              String         GetChunkIDString();
157              uint32_t       GetChunkID() { return ChunkID; };            ///< Chunk ID in unsigned integer representation.              uint32_t       GetChunkID() { return ChunkID; }             ///< Chunk ID in unsigned integer representation.
158              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.
159              unsigned long  GetSize()    { return CurrentChunkSize; };   ///< 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)
160              unsigned long  GetNewSize() { return NewChunkSize;     };   ///< New chunk size if it was modified with Resize().              unsigned long  GetNewSize() { return NewChunkSize;     }    ///< New chunk size if it was modified with Resize().
161              unsigned long  GetPos()     { return ulPos; };              ///< Position within the chunk data body              unsigned long  GetPos()     { return ulPos; }               ///< Position within the chunk data body
162              unsigned long  GetFilePos() { return ulStartPos + ulPos; }; ///< Current, actual offset in file.              unsigned long  GetFilePos() { return ulStartPos + ulPos; }  ///< Current, actual offset in file.
163              unsigned long  SetPos(unsigned long Where, stream_whence_t Whence = stream_start);              unsigned long  SetPos(unsigned long Where, stream_whence_t Whence = stream_start);
164              unsigned long  RemainingBytes();              unsigned long  RemainingBytes();
165              stream_state_t GetState();              stream_state_t GetState();
# Line 205  namespace RIFF { Line 240  namespace RIFF {
240              friend class List;              friend class List;
241      };      };
242    
243      /** Provides convenient methods to access data of RIFF list chunks and their subchunks. */      /** @brief RIFF List Chunk
244         *
245         * Provides convenient methods to access data of RIFF list chunks and
246         * their subchunks.
247         */
248      class List : public Chunk {      class List : public Chunk {
249          public:          public:
250              List(File* pFile, unsigned long StartPos, List* Parent);              List(File* pFile, unsigned long StartPos, List* Parent);
# Line 224  namespace RIFF { Line 263  namespace RIFF {
263              Chunk*       AddSubChunk(uint32_t uiChunkID, uint uiBodySize);              Chunk*       AddSubChunk(uint32_t uiChunkID, uint uiBodySize);
264              List*        AddSubList(uint32_t uiListType);              List*        AddSubList(uint32_t uiListType);
265              void         DeleteSubChunk(Chunk* pSubChunk);              void         DeleteSubChunk(Chunk* pSubChunk);
266                void         MoveSubChunk(Chunk* pSrc, Chunk* pDst);
267              virtual ~List();              virtual ~List();
268          protected:          protected:
269              typedef std::map<uint32_t, RIFF::Chunk*>  ChunkMap;              typedef std::map<uint32_t, RIFF::Chunk*>  ChunkMap;
# Line 243  namespace RIFF { Line 283  namespace RIFF {
283              void LoadSubChunksRecursively();              void LoadSubChunksRecursively();
284              virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);              virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
285              virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.              virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
286                void DeleteChunkList();
287      };      };
288    
289      /** Parses arbitrary RIFF files and provides together with it's base classes convenient methods to walk through the RIFF tree. */      /** @brief RIFF File
290         *
291         * Handles arbitrary RIFF files and provides together with its base
292         * classes convenient methods to walk through, read and modify the
293         * file's RIFF tree.
294         */
295      class File : public List {      class File : public List {
296          public:          public:
297              File(uint32_t FileType);              File(uint32_t FileType);
298              File(const String& path);              File(const String& path);
299              stream_mode_t GetMode();              stream_mode_t GetMode();
300              bool          SetMode(stream_mode_t NewMode);              bool          SetMode(stream_mode_t NewMode);
301                void SetByteOrder(endian_t Endian);
302              String GetFileName();              String GetFileName();
303              virtual void Save();              virtual void Save();
304              virtual void Save(const String& path);              virtual void Save(const String& path);
# Line 276  namespace RIFF { Line 323  namespace RIFF {
323              friend class List;              friend class List;
324          private:          private:
325              stream_mode_t  Mode;              stream_mode_t  Mode;
326              ChunkList      ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).              ChunkList ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).
327    
328              unsigned long GetFileSize();              unsigned long GetFileSize();
329              void ResizeFile(unsigned long ulNewSize);              void ResizeFile(unsigned long ulNewSize);
# Line 289  namespace RIFF { Line 336  namespace RIFF {
336              #endif              #endif
337      };      };
338    
339      /** Will be thrown whenever an error occurs while parsing a RIFF file. */      /**
340         * Will be thrown whenever an error occurs while handling a RIFF file.
341         */
342      class Exception {      class Exception {
343          public:          public:
344              String Message;              String Message;
345    
346              Exception(String Message) { Exception::Message = Message; };              Exception(String Message) { Exception::Message = Message; }
347              void PrintMessage();              void PrintMessage();
348              virtual ~Exception() {};              virtual ~Exception() {}
349      };      };
350    
351      String libraryName();      String libraryName();
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