trunk/src/RIFF.h

/***************************************************************************
 *                                                                         *
 *   libgig - C++ cross-platform Gigasampler format file access library    *
 *                                                                         *
 *   Copyright (C) 2003-2016 by Christian Schoenebeck                      *
 *                              <cuse@users.sourceforge.net>               *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this library; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#ifndef __RIFF_H__
#define __RIFF_H__

#ifdef WIN32
# define POSIX 0
#endif

#ifndef POSIX
# define POSIX 1
#endif

#ifndef DEBUG
# define DEBUG 0
#endif

#include <string>
#include <list>
#include <map>
#include <set>
#include <iostream>

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#if POSIX
# include <sys/types.h>
# include <sys/stat.h>
# include <fcntl.h>
# include <unistd.h>
#endif // POSIX

#ifdef _MSC_VER
// Visual C++ 2008 doesn't have stdint.h
typedef __int8 int8_t;
typedef __int16 int16_t;
typedef __int32 int32_t;
typedef __int64 int64_t;
typedef unsigned __int8 uint8_t;
typedef unsigned __int16 uint16_t;
typedef unsigned __int32 uint32_t;
typedef unsigned __int64 uint64_t;
#else
#include <stdint.h>
#endif

#ifdef WIN32
# if (_WIN32 && !_WIN64) || (__GNUC__ && !(__x86_64__ || __ppc64__)) /* if 32 bit windows compilation */
#  define _WIN32_WINNT 0x0501 /* Win XP (no service pack): required for 32 bit compilation for GetFileSizeEx() to be declared by windows.h */
# endif
# include <windows.h>
  typedef unsigned int   uint;
#endif // WIN32

#include <stdio.h>

#if WORDS_BIGENDIAN
# define CHUNK_ID_RIFF  0x52494646
# define CHUNK_ID_RIFX  0x52494658
# define CHUNK_ID_LIST  0x4C495354

# define LIST_TYPE_INFO 0x494E464F
# define CHUNK_ID_ICMT  0x49434D54
# define CHUNK_ID_ICOP  0x49434F50
# define CHUNK_ID_ICRD  0x49435244
# define CHUNK_ID_IENG  0x49454E47
# define CHUNK_ID_INAM  0x494E414D
# define CHUNK_ID_IPRD  0x49505244
# define CHUNK_ID_ISFT  0x49534654

# define CHUNK_ID_SMPL  0x736D706C

#else  // little endian
# define CHUNK_ID_RIFF  0x46464952
# define CHUNK_ID_RIFX  0x58464952
# define CHUNK_ID_LIST  0x5453494C

# define LIST_TYPE_INFO 0x4F464E49
# define CHUNK_ID_ICMT  0x544D4349
# define CHUNK_ID_ICOP  0x504F4349
# define CHUNK_ID_ICRD  0x44524349
# define CHUNK_ID_IENG  0x474E4549
# define CHUNK_ID_INAM  0x4D414E49
# define CHUNK_ID_IPRD  0x44525049
# define CHUNK_ID_ISFT  0x54465349

# define CHUNK_ID_SMPL  0x6C706D73

#endif // WORDS_BIGENDIAN

#define CHUNK_HEADER_SIZE(fileOffsetSize)   (4 + fileOffsetSize)
#define LIST_HEADER_SIZE(fileOffsetSize)    (8 + fileOffsetSize)
#define RIFF_HEADER_SIZE(fileOffsetSize)    (8 + fileOffsetSize)

/**
 * @brief RIFF specific classes and definitions
 *
 * The Resource Interchange File Format (RIFF) is a generic tree-structured
 * meta-format which stores data in so called "chunks". It can be compared
 * to XML, but in contrast to XML, RIFF is entirely binary encoded, that is
 * not ASCII based. RIFF is used as basis for many file formats like AVI,
 * WAV, DLS and of course the Gigasampler file format. ;-)
 *
 * RIFF chunks can be seen as containers for data. There are two distinct
 * types of chunks:
 *
 * - @e ordinary @e chunks are the leafs of the data tree which encapsulate
 *   the actual data of the file (i.e. the sample data of a .wav file)
 *
 * - @e list @e chunks are the nodes of the data tree which hold an
 *   arbitrary amount of subchunks (can be both, list chunks and/or ordinary
 *   chunks)
 */
namespace RIFF {

    /* just symbol prototyping */
    class Chunk;
    class List;
    class File;

    typedef std::string String;

    /** Type used by libgig for handling file positioning during file I/O tasks. */
    typedef uint64_t file_offset_t;

    /** Whether file stream is open in read or in read/write mode. */
    typedef enum {
        stream_mode_read       = 0,
        stream_mode_read_write = 1,
        stream_mode_closed     = 2
    } stream_mode_t;

    /** Current state of the file stream. */
    typedef enum {
        stream_ready       = 0,
        stream_end_reached = 1,
        stream_closed      = 2
    } stream_state_t;

    /** File stream position dependent to these relations. */
    typedef enum {
        stream_start    = 0,
        stream_curpos   = 1,
        stream_backward = 2,
        stream_end      = 3
    } stream_whence_t;

    /** Alignment of data bytes in memory (system dependant). */
    typedef enum {
        endian_little = 0,
        endian_big    = 1,
        endian_native = 2
    } endian_t;

    /** General RIFF chunk structure of a RIFF file. */
    enum layout_t {
        layout_standard = 0, ///< Standard RIFF file layout: First chunk in file is a List chunk which contains all other chunks and there are no chunks outside the scope of that very first (List) chunk.
        layout_flat     = 1  ///< Not a "real" RIFF file: First chunk in file is an ordinary data chunk, not a List chunk, and there might be other chunks after that first chunk.
    };

    /** Size of RIFF file offsets used in all RIFF chunks' headers. @see File::GetFileOffsetSize() */
    enum offset_size_t {
        offset_size_auto  = 0, ///< Use 32 bit offsets for files smaller than 4 GB, use 64 bit offsets for files equal or larger than 4 GB.
        offset_size_32bit = 4, ///< Always use 32 bit offsets (even for files larger than 4 GB).
        offset_size_64bit = 8  ///< Always use 64 bit offsets (even for files smaller than 4 GB).
    };

    /**
     * @brief Used for indicating the progress of a certain task.
     *
     * The function pointer argument has to be supplied with a valid
     * function of the given signature which will then be called on
     * progress changes. An equivalent progress_t structure will be passed
     * back as argument to the callback function on each progress change.
     * The factor field of the supplied progress_t structure will then
     * reflect the current progress as value between 0.0 and 1.0. You might
     * want to use the custom field for data needed in your callback
     * function.
     */
    struct progress_t {
        void (*callback)(progress_t*); ///< Callback function pointer which has to be assigned to a function for progress notification.
        float factor;                  ///< Reflects current progress as value between 0.0 and 1.0.
        void* custom;                  ///< This pointer can be used for arbitrary data.
        float __range_min;             ///< Only for internal usage, do not modify!
        float __range_max;             ///< Only for internal usage, do not modify!
        progress_t();
    };

    /** @brief Ordinary RIFF Chunk
     *
     * Provides convenient methods to access data of ordinary RIFF chunks
     * in general.
     */
    class Chunk {
        public:
            Chunk(File* pFile, file_offset_t StartPos, List* Parent);
            String         GetChunkIDString() const;
            uint32_t       GetChunkID() const { return ChunkID; }       ///< Chunk ID in unsigned integer representation.
            File*          GetFile() const    { return pFile;   }       ///< Returns pointer to the chunk's File object.
            List*          GetParent() const  { return pParent; }       ///< Returns pointer to the chunk's parent list chunk.
            file_offset_t  GetSize() const { return ullCurrentChunkSize; } ///< Chunk size in bytes (without header, thus the chunk data body)
            file_offset_t  GetNewSize() const { return ullNewChunkSize; } ///< New chunk size if it was modified with Resize(), otherwise value returned will be equal to GetSize().
            file_offset_t  GetPos() const { return ullPos; }            ///< Position within the chunk data body (starting with 0).
            file_offset_t  GetFilePos() const { return ullStartPos + ullPos; } ///< Current, actual offset of chunk data body start in file.
            file_offset_t  SetPos(file_offset_t Where, stream_whence_t Whence = stream_start);
            file_offset_t  RemainingBytes() const;
            stream_state_t GetState() const;
            file_offset_t  Read(void* pData, file_offset_t WordCount, file_offset_t WordSize);
            file_offset_t  ReadInt8(int8_t* pData,     file_offset_t WordCount = 1);
            file_offset_t  ReadUint8(uint8_t* pData,   file_offset_t WordCount = 1);
            file_offset_t  ReadInt16(int16_t* pData,   file_offset_t WordCount = 1);
            file_offset_t  ReadUint16(uint16_t* pData, file_offset_t WordCount = 1);
            file_offset_t  ReadInt32(int32_t* pData,   file_offset_t WordCount = 1);
            file_offset_t  ReadUint32(uint32_t* pData, file_offset_t WordCount = 1);
            int8_t         ReadInt8();
            uint8_t        ReadUint8();
            int16_t        ReadInt16();
            uint16_t       ReadUint16();
            int32_t        ReadInt32();
            uint32_t       ReadUint32();
            void           ReadString(String& s, int size);
            file_offset_t  Write(void* pData, file_offset_t WordCount, file_offset_t WordSize);
            file_offset_t  WriteInt8(int8_t* pData,     file_offset_t WordCount = 1);
            file_offset_t  WriteUint8(uint8_t* pData,   file_offset_t WordCount = 1);
            file_offset_t  WriteInt16(int16_t* pData,   file_offset_t WordCount = 1);
            file_offset_t  WriteUint16(uint16_t* pData, file_offset_t WordCount = 1);
            file_offset_t  WriteInt32(int32_t* pData,   file_offset_t WordCount = 1);
            file_offset_t  WriteUint32(uint32_t* pData, file_offset_t WordCount = 1);
            void*          LoadChunkData();
            void           ReleaseChunkData();
            void           Resize(file_offset_t NewSize);
            virtual ~Chunk();
        protected:
            uint32_t      ChunkID;
            file_offset_t ullCurrentChunkSize;          /* in bytes */
            file_offset_t ullNewChunkSize;                      /* in bytes (if chunk was scheduled to be resized) */
            List*         pParent;
            File*         pFile;
            file_offset_t ullStartPos;  /* actual position in file where chunk data (without header) starts */
            file_offset_t ullPos;       /* # of bytes from ulStartPos */
            uint8_t*      pChunkData;
            file_offset_t ullChunkDataSize;

            Chunk(File* pFile);
            Chunk(File* pFile, List* pParent, uint32_t uiChunkID, file_offset_t ullBodySize);
            void ReadHeader(file_offset_t filePos);
            void WriteHeader(file_offset_t filePos);
            file_offset_t ReadSceptical(void* pData, file_offset_t WordCount, file_offset_t WordSize);
            inline static String convertToString(uint32_t word) {
                String result;
                for (int i = 0; i < 4; i++) {
                    uint8_t byte = *((uint8_t*)(&word) + i);
                    char c = byte;
                    result += c;
                }
                return result;
            }
            virtual file_offset_t RequiredPhysicalSize(int fileOffsetSize);
            virtual file_offset_t WriteChunk(file_offset_t ullWritePos, file_offset_t ullCurrentDataOffset, progress_t* pProgress = NULL);
            virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.

            friend class List;
    };

    /** @brief RIFF List Chunk
     *
     * Provides convenient methods to access data of RIFF list chunks and
     * their subchunks.
     */
    class List : public Chunk {
        public:
            List(File* pFile, file_offset_t StartPos, List* Parent);
            String       GetListTypeString() const;
            uint32_t     GetListType() const { return ListType; } ///< Returns unsigned integer representation of the list's ID
            Chunk*       GetSubChunk(uint32_t ChunkID);
            List*        GetSubList(uint32_t ListType);
            Chunk*       GetFirstSubChunk();
            Chunk*       GetNextSubChunk();
            List*        GetFirstSubList();
            List*        GetNextSubList();
            size_t       CountSubChunks();
            size_t       CountSubChunks(uint32_t ChunkID);
            size_t       CountSubLists();
            size_t       CountSubLists(uint32_t ListType);
            Chunk*       AddSubChunk(uint32_t uiChunkID, file_offset_t ullBodySize);
            List*        AddSubList(uint32_t uiListType);
            void         DeleteSubChunk(Chunk* pSubChunk);
            void         MoveSubChunk(Chunk* pSrc, Chunk* pDst); // read API doc comments !!!
            void         MoveSubChunk(Chunk* pSrc, List* pNewParent);
            virtual ~List();
        protected:
            typedef std::map<uint32_t, RIFF::Chunk*>  ChunkMap;
            typedef std::list<Chunk*>                 ChunkList;
            typedef std::set<Chunk*>                  ChunkSet;

            uint32_t   ListType;
            ChunkList* pSubChunks;
            ChunkMap*  pSubChunksMap;
            ChunkList::iterator ChunksIterator;
            ChunkList::iterator ListIterator;

            List(File* pFile);
            List(File* pFile, List* pParent, uint32_t uiListID);
            void ReadHeader(file_offset_t filePos);
            void WriteHeader(file_offset_t filePos);
            void LoadSubChunks(progress_t* pProgress = NULL);
            void LoadSubChunksRecursively(progress_t* pProgress = NULL);
            virtual file_offset_t RequiredPhysicalSize(int fileOffsetSize);
            virtual file_offset_t WriteChunk(file_offset_t ullWritePos, file_offset_t ullCurrentDataOffset, progress_t* pProgress = NULL);
            virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
            void DeleteChunkList();
    };

    /** @brief RIFF File
     *
     * Handles arbitrary RIFF files and provides together with its base
     * classes convenient methods to walk through, read and modify the
     * file's RIFF tree.
     */
    class File : public List {
        public:
            File(uint32_t FileType);
            File(const String& path);
            File(const String& path, uint32_t FileType, endian_t Endian, layout_t layout, offset_size_t fileOffsetSize = offset_size_auto);
            stream_mode_t GetMode() const;
            bool          SetMode(stream_mode_t NewMode);
            void SetByteOrder(endian_t Endian);
            String GetFileName() const;
            void SetFileName(const String& path);
            bool IsNew() const;
            layout_t GetLayout() const;
            file_offset_t GetCurrentFileSize() const;
            file_offset_t GetRequiredFileSize();
            file_offset_t GetRequiredFileSize(offset_size_t fileOffsetSize);
            int GetFileOffsetSize() const;
            int GetRequiredFileOffsetSize();

            virtual void Save(progress_t* pProgress = NULL);
            virtual void Save(const String& path, progress_t* pProgress = NULL);
            virtual ~File();
        protected:
            #if POSIX
            int    hFileRead;  ///< handle / descriptor for reading from file
            int    hFileWrite; ///< handle / descriptor for writing to (some) file
            #elif defined(WIN32)
            HANDLE hFileRead;  ///< handle / descriptor for reading from file
            HANDLE hFileWrite; ///< handle / descriptor for writing to (some) file
            #else
            FILE*  hFileRead;  ///< handle / descriptor for reading from file
            FILE*  hFileWrite; ///< handle / descriptor for writing to (some) file
            #endif // POSIX
            String Filename;
            bool   bEndianNative;
            bool   bIsNewFile;
            layout_t Layout; ///< An ordinary RIFF file is always set to layout_standard.
            offset_size_t FileOffsetPreference;
            int FileOffsetSize; ///< Size of file offsets (in bytes) when this file was opened (or saved the last time).

            friend class Chunk;
            friend class List;
        private:
            stream_mode_t  Mode;

            void __openExistingFile(const String& path, uint32_t* FileType = NULL);
            void ResizeFile(file_offset_t ullNewSize);
            #if POSIX
            file_offset_t __GetFileSize(int hFile) const;
            #elif defined(WIN32)
            file_offset_t __GetFileSize(HANDLE hFile) const;
            #else
            file_offset_t __GetFileSize(FILE* hFile) const;
            #endif
            int FileOffsetSizeFor(file_offset_t fileSize) const;
            void Cleanup();
    };

    /**
     * Will be thrown whenever an error occurs while handling a RIFF file.
     */
    class Exception {
        public:
            String Message;

            Exception(String Message) { Exception::Message = Message; }
            void PrintMessage();
            virtual ~Exception() {}
    };

    String libraryName();
    String libraryVersion();

} // namespace RIFF
#endif // __RIFF_H__
1	schoenebeck	2	/***************************************************************************
2			* *
3	schoenebeck	933	* libgig - C++ cross-platform Gigasampler format file access library *
4	schoenebeck	2	* *
5	schoenebeck	2912	* Copyright (C) 2003-2016 by Christian Schoenebeck *
6	schoenebeck	384	* <cuse@users.sourceforge.net> *
7	schoenebeck	2	* *
8			* 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 *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This library is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this library; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24			#ifndef __RIFF_H__
25			#define __RIFF_H__
26
27	schoenebeck	1050	#ifdef WIN32
28			# define POSIX 0
29			#endif
30	schoenebeck	2
31	schoenebeck	1050	#ifndef POSIX
32			# define POSIX 1
33			#endif
34
35			#ifndef DEBUG
36			# define DEBUG 0
37			#endif
38
39	schoenebeck	2	#include <string>
40			#include <list>
41			#include <map>
42	schoenebeck	2703	#include <set>
43	schoenebeck	2	#include <iostream>
44
45	schoenebeck	11	#ifdef HAVE_CONFIG_H
46			# include <config.h>
47			#endif
48
49	schoenebeck	2	#if POSIX
50			# include <sys/types.h>
51			# include <sys/stat.h>
52			# include <fcntl.h>
53			# include <unistd.h>
54			#endif // POSIX
55
56	persson	1869	#ifdef _MSC_VER
57			// Visual C++ 2008 doesn't have stdint.h
58			typedef __int8 int8_t;
59			typedef __int16 int16_t;
60			typedef __int32 int32_t;
61			typedef __int64 int64_t;
62			typedef unsigned __int8 uint8_t;
63			typedef unsigned __int16 uint16_t;
64			typedef unsigned __int32 uint32_t;
65			typedef unsigned __int64 uint64_t;
66			#else
67	schoenebeck	2	#include <stdint.h>
68	persson	1869	#endif
69	schoenebeck	2
70	schoenebeck	1050	#ifdef WIN32
71	schoenebeck	2916	# if (_WIN32 && !_WIN64) \|\| (__GNUC__ && !(__x86_64__ \|\| __ppc64__)) /* if 32 bit windows compilation */
72			# define _WIN32_WINNT 0x0501 /* Win XP (no service pack): required for 32 bit compilation for GetFileSizeEx() to be declared by windows.h */
73			# endif
74	schoenebeck	1050	# include <windows.h>
75			typedef unsigned int uint;
76			#endif // WIN32
77	schoenebeck	2
78			#include <stdio.h>
79
80			#if WORDS_BIGENDIAN
81			# define CHUNK_ID_RIFF 0x52494646
82			# define CHUNK_ID_RIFX 0x52494658
83			# define CHUNK_ID_LIST 0x4C495354
84	persson	2044
85			# define LIST_TYPE_INFO 0x494E464F
86			# define CHUNK_ID_ICMT 0x49434D54
87			# define CHUNK_ID_ICOP 0x49434F50
88			# define CHUNK_ID_ICRD 0x49435244
89			# define CHUNK_ID_IENG 0x49454E47
90			# define CHUNK_ID_INAM 0x494E414D
91			# define CHUNK_ID_IPRD 0x49505244
92			# define CHUNK_ID_ISFT 0x49534654
93
94			# define CHUNK_ID_SMPL 0x736D706C
95
96	schoenebeck	2	#else // little endian
97			# define CHUNK_ID_RIFF 0x46464952
98			# define CHUNK_ID_RIFX 0x58464952
99			# define CHUNK_ID_LIST 0x5453494C
100	persson	2044
101			# define LIST_TYPE_INFO 0x4F464E49
102			# define CHUNK_ID_ICMT 0x544D4349
103			# define CHUNK_ID_ICOP 0x504F4349
104			# define CHUNK_ID_ICRD 0x44524349
105			# define CHUNK_ID_IENG 0x474E4549
106			# define CHUNK_ID_INAM 0x4D414E49
107			# define CHUNK_ID_IPRD 0x44525049
108			# define CHUNK_ID_ISFT 0x54465349
109
110			# define CHUNK_ID_SMPL 0x6C706D73
111
112	schoenebeck	2	#endif // WORDS_BIGENDIAN
113
114	schoenebeck	2912	#define CHUNK_HEADER_SIZE(fileOffsetSize) (4 + fileOffsetSize)
115			#define LIST_HEADER_SIZE(fileOffsetSize) (8 + fileOffsetSize)
116			#define RIFF_HEADER_SIZE(fileOffsetSize) (8 + fileOffsetSize)
117	schoenebeck	2
118	schoenebeck	1193	/**
119			* @brief RIFF specific classes and definitions
120			*
121			* The Resource Interchange File Format (RIFF) is a generic tree-structured
122			* meta-format which stores data in so called "chunks". It can be compared
123			* to XML, but in contrast to XML, RIFF is entirely binary encoded, that is
124			* not ASCII based. RIFF is used as basis for many file formats like AVI,
125			* WAV, DLS and of course the Gigasampler file format. ;-)
126			*
127			* RIFF chunks can be seen as containers for data. There are two distinct
128			* types of chunks:
129			*
130			* - @e ordinary @e chunks are the leafs of the data tree which encapsulate
131			* the actual data of the file (i.e. the sample data of a .wav file)
132			*
133			* - @e list @e chunks are the nodes of the data tree which hold an
134			* arbitrary amount of subchunks (can be both, list chunks and/or ordinary
135			* chunks)
136			*/
137	schoenebeck	2	namespace RIFF {
138
139			/* just symbol prototyping */
140			class Chunk;
141			class List;
142	schoenebeck	780	class File;
143	schoenebeck	2
144			typedef std::string String;
145
146	schoenebeck	2912	/** Type used by libgig for handling file positioning during file I/O tasks. */
147			typedef uint64_t file_offset_t;
148
149	schoenebeck	780	/** Whether file stream is open in read or in read/write mode. */
150			typedef enum {
151	schoenebeck	798	stream_mode_read = 0,
152			stream_mode_read_write = 1,
153			stream_mode_closed = 2
154	schoenebeck	780	} stream_mode_t;
155
156	schoenebeck	2	/** Current state of the file stream. */
157			typedef enum {
158			stream_ready = 0,
159			stream_end_reached = 1,
160			stream_closed = 2
161			} stream_state_t;
162
163			/** File stream position dependent to these relations. */
164			typedef enum {
165			stream_start = 0,
166			stream_curpos = 1,
167			stream_backward = 2,
168			stream_end = 3
169			} stream_whence_t;
170
171	schoenebeck	1193	/** Alignment of data bytes in memory (system dependant). */
172	persson	1183	typedef enum {
173			endian_little = 0,
174			endian_big = 1,
175			endian_native = 2
176			} endian_t;
177
178	schoenebeck	2912	/** General RIFF chunk structure of a RIFF file. */
179	schoenebeck	2543	enum layout_t {
180			layout_standard = 0, ///< Standard RIFF file layout: First chunk in file is a List chunk which contains all other chunks and there are no chunks outside the scope of that very first (List) chunk.
181			layout_flat = 1 ///< Not a "real" RIFF file: First chunk in file is an ordinary data chunk, not a List chunk, and there might be other chunks after that first chunk.
182			};
183
184	schoenebeck	2912	/** Size of RIFF file offsets used in all RIFF chunks' headers. @see File::GetFileOffsetSize() */
185			enum offset_size_t {
186			offset_size_auto = 0, ///< Use 32 bit offsets for files smaller than 4 GB, use 64 bit offsets for files equal or larger than 4 GB.
187			offset_size_32bit = 4, ///< Always use 32 bit offsets (even for files larger than 4 GB).
188			offset_size_64bit = 8 ///< Always use 64 bit offsets (even for files smaller than 4 GB).
189			};
190
191	schoenebeck	2682	/**
192			* @brief Used for indicating the progress of a certain task.
193			*
194			* The function pointer argument has to be supplied with a valid
195			* function of the given signature which will then be called on
196			* progress changes. An equivalent progress_t structure will be passed
197			* back as argument to the callback function on each progress change.
198			* The factor field of the supplied progress_t structure will then
199			* reflect the current progress as value between 0.0 and 1.0. You might
200			* want to use the custom field for data needed in your callback
201			* function.
202			*/
203			struct progress_t {
204			void (callback)(progress_t); ///< Callback function pointer which has to be assigned to a function for progress notification.
205			float factor; ///< Reflects current progress as value between 0.0 and 1.0.
206			void* custom; ///< This pointer can be used for arbitrary data.
207			float __range_min; ///< Only for internal usage, do not modify!
208			float __range_max; ///< Only for internal usage, do not modify!
209			progress_t();
210			};
211
212	schoenebeck	1193	/** @brief Ordinary RIFF Chunk
213			*
214			* Provides convenient methods to access data of ordinary RIFF chunks
215			* in general.
216			*/
217	schoenebeck	2	class Chunk {
218			public:
219	schoenebeck	2912	Chunk(File* pFile, file_offset_t StartPos, List* Parent);
220			String GetChunkIDString() const;
221			uint32_t GetChunkID() const { return ChunkID; } ///< Chunk ID in unsigned integer representation.
222			File* GetFile() const { return pFile; } ///< Returns pointer to the chunk's File object.
223			List* GetParent() const { return pParent; } ///< Returns pointer to the chunk's parent list chunk.
224			file_offset_t GetSize() const { return ullCurrentChunkSize; } ///< Chunk size in bytes (without header, thus the chunk data body)
225			file_offset_t GetNewSize() const { return ullNewChunkSize; } ///< New chunk size if it was modified with Resize(), otherwise value returned will be equal to GetSize().
226			file_offset_t GetPos() const { return ullPos; } ///< Position within the chunk data body (starting with 0).
227			file_offset_t GetFilePos() const { return ullStartPos + ullPos; } ///< Current, actual offset of chunk data body start in file.
228			file_offset_t SetPos(file_offset_t Where, stream_whence_t Whence = stream_start);
229			file_offset_t RemainingBytes() const;
230			stream_state_t GetState() const;
231			file_offset_t Read(void* pData, file_offset_t WordCount, file_offset_t WordSize);
232			file_offset_t ReadInt8(int8_t* pData, file_offset_t WordCount = 1);
233			file_offset_t ReadUint8(uint8_t* pData, file_offset_t WordCount = 1);
234			file_offset_t ReadInt16(int16_t* pData, file_offset_t WordCount = 1);
235			file_offset_t ReadUint16(uint16_t* pData, file_offset_t WordCount = 1);
236			file_offset_t ReadInt32(int32_t* pData, file_offset_t WordCount = 1);
237			file_offset_t ReadUint32(uint32_t* pData, file_offset_t WordCount = 1);
238	schoenebeck	2	int8_t ReadInt8();
239			uint8_t ReadUint8();
240			int16_t ReadInt16();
241			uint16_t ReadUint16();
242			int32_t ReadInt32();
243			uint32_t ReadUint32();
244	persson	2450	void ReadString(String& s, int size);
245	schoenebeck	2912	file_offset_t Write(void* pData, file_offset_t WordCount, file_offset_t WordSize);
246			file_offset_t WriteInt8(int8_t* pData, file_offset_t WordCount = 1);
247			file_offset_t WriteUint8(uint8_t* pData, file_offset_t WordCount = 1);
248			file_offset_t WriteInt16(int16_t* pData, file_offset_t WordCount = 1);
249			file_offset_t WriteUint16(uint16_t* pData, file_offset_t WordCount = 1);
250			file_offset_t WriteInt32(int32_t* pData, file_offset_t WordCount = 1);
251			file_offset_t WriteUint32(uint32_t* pData, file_offset_t WordCount = 1);
252	schoenebeck	780	void* LoadChunkData();
253			void ReleaseChunkData();
254	schoenebeck	2912	void Resize(file_offset_t NewSize);
255	schoenebeck	384	virtual ~Chunk();
256	schoenebeck	2	protected:
257			uint32_t ChunkID;
258	schoenebeck	2912	file_offset_t ullCurrentChunkSize; /* in bytes */
259			file_offset_t ullNewChunkSize; /* in bytes (if chunk was scheduled to be resized) */
260	schoenebeck	2	List* pParent;
261	schoenebeck	780	File* pFile;
262	schoenebeck	2912	file_offset_t ullStartPos; /* actual position in file where chunk data (without header) starts */
263			file_offset_t ullPos; /* # of bytes from ulStartPos */
264	schoenebeck	2	uint8_t* pChunkData;
265	schoenebeck	2912	file_offset_t ullChunkDataSize;
266	schoenebeck	2
267	schoenebeck	780	Chunk(File* pFile);
268	schoenebeck	2912	Chunk(File* pFile, List* pParent, uint32_t uiChunkID, file_offset_t ullBodySize);
269			void ReadHeader(file_offset_t filePos);
270			void WriteHeader(file_offset_t filePos);
271			file_offset_t ReadSceptical(void* pData, file_offset_t WordCount, file_offset_t WordSize);
272			inline static String convertToString(uint32_t word) {
273	schoenebeck	2	String result;
274			for (int i = 0; i < 4; i++) {
275			uint8_t byte = ((uint8_t)(&word) + i);
276			char c = byte;
277			result += c;
278			}
279			return result;
280			}
281	schoenebeck	2912	virtual file_offset_t RequiredPhysicalSize(int fileOffsetSize);
282			virtual file_offset_t WriteChunk(file_offset_t ullWritePos, file_offset_t ullCurrentDataOffset, progress_t* pProgress = NULL);
283	schoenebeck	780	virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.
284
285			friend class List;
286	schoenebeck	2	};
287
288	schoenebeck	1193	/** @brief RIFF List Chunk
289			*
290			* Provides convenient methods to access data of RIFF list chunks and
291			* their subchunks.
292			*/
293	schoenebeck	2	class List : public Chunk {
294			public:
295	schoenebeck	2912	List(File* pFile, file_offset_t StartPos, List* Parent);
296			String GetListTypeString() const;
297			uint32_t GetListType() const { return ListType; } ///< Returns unsigned integer representation of the list's ID
298	schoenebeck	11	Chunk* GetSubChunk(uint32_t ChunkID);
299			List* GetSubList(uint32_t ListType);
300	schoenebeck	2	Chunk* GetFirstSubChunk();
301			Chunk* GetNextSubChunk();
302			List* GetFirstSubList();
303			List* GetNextSubList();
304	schoenebeck	2922	size_t CountSubChunks();
305			size_t CountSubChunks(uint32_t ChunkID);
306			size_t CountSubLists();
307			size_t CountSubLists(uint32_t ListType);
308	schoenebeck	2912	Chunk* AddSubChunk(uint32_t uiChunkID, file_offset_t ullBodySize);
309	schoenebeck	780	List* AddSubList(uint32_t uiListType);
310			void DeleteSubChunk(Chunk* pSubChunk);
311	schoenebeck	2584	void MoveSubChunk(Chunk* pSrc, Chunk* pDst); // read API doc comments !!!
312			void MoveSubChunk(Chunk* pSrc, List* pNewParent);
313	schoenebeck	384	virtual ~List();
314	schoenebeck	2	protected:
315			typedef std::map<uint32_t, RIFF::Chunk*> ChunkMap;
316			typedef std::list<Chunk*> ChunkList;
317	schoenebeck	2703	typedef std::set<Chunk*> ChunkSet;
318	schoenebeck	2
319			uint32_t ListType;
320			ChunkList* pSubChunks;
321			ChunkMap* pSubChunksMap;
322			ChunkList::iterator ChunksIterator;
323			ChunkList::iterator ListIterator;
324
325	schoenebeck	780	List(File* pFile);
326			List(File* pFile, List* pParent, uint32_t uiListID);
327	schoenebeck	2912	void ReadHeader(file_offset_t filePos);
328			void WriteHeader(file_offset_t filePos);
329	schoenebeck	2682	void LoadSubChunks(progress_t* pProgress = NULL);
330			void LoadSubChunksRecursively(progress_t* pProgress = NULL);
331	schoenebeck	2912	virtual file_offset_t RequiredPhysicalSize(int fileOffsetSize);
332			virtual file_offset_t WriteChunk(file_offset_t ullWritePos, file_offset_t ullCurrentDataOffset, progress_t* pProgress = NULL);
333	schoenebeck	780	virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
334	persson	1869	void DeleteChunkList();
335	schoenebeck	2	};
336
337	schoenebeck	1193	/** @brief RIFF File
338			*
339			* Handles arbitrary RIFF files and provides together with its base
340			* classes convenient methods to walk through, read and modify the
341			* file's RIFF tree.
342			*/
343	schoenebeck	2	class File : public List {
344			public:
345	schoenebeck	798	File(uint32_t FileType);
346	schoenebeck	2	File(const String& path);
347	schoenebeck	2912	File(const String& path, uint32_t FileType, endian_t Endian, layout_t layout, offset_size_t fileOffsetSize = offset_size_auto);
348			stream_mode_t GetMode() const;
349	schoenebeck	780	bool SetMode(stream_mode_t NewMode);
350	persson	1184	void SetByteOrder(endian_t Endian);
351	schoenebeck	2912	String GetFileName() const;
352	schoenebeck	2482	void SetFileName(const String& path);
353			bool IsNew() const;
354	schoenebeck	2543	layout_t GetLayout() const;
355	schoenebeck	2912	file_offset_t GetCurrentFileSize() const;
356			file_offset_t GetRequiredFileSize();
357			file_offset_t GetRequiredFileSize(offset_size_t fileOffsetSize);
358			int GetFileOffsetSize() const;
359			int GetRequiredFileOffsetSize();
360
361	schoenebeck	2682	virtual void Save(progress_t* pProgress = NULL);
362			virtual void Save(const String& path, progress_t* pProgress = NULL);
363	schoenebeck	384	virtual ~File();
364	schoenebeck	780	protected:
365			#if POSIX
366			int hFileRead; ///< handle / descriptor for reading from file
367			int hFileWrite; ///< handle / descriptor for writing to (some) file
368	schoenebeck	1050	#elif defined(WIN32)
369			HANDLE hFileRead; ///< handle / descriptor for reading from file
370			HANDLE hFileWrite; ///< handle / descriptor for writing to (some) file
371	schoenebeck	780	#else
372			FILE* hFileRead; ///< handle / descriptor for reading from file
373			FILE* hFileWrite; ///< handle / descriptor for writing to (some) file
374			#endif // POSIX
375			String Filename;
376			bool bEndianNative;
377	schoenebeck	2482	bool bIsNewFile;
378	schoenebeck	2543	layout_t Layout; ///< An ordinary RIFF file is always set to layout_standard.
379	schoenebeck	2912	offset_size_t FileOffsetPreference;
380			int FileOffsetSize; ///< Size of file offsets (in bytes) when this file was opened (or saved the last time).
381	schoenebeck	780
382			friend class Chunk;
383			friend class List;
384	schoenebeck	2	private:
385	schoenebeck	780	stream_mode_t Mode;
386
387	schoenebeck	2543	void __openExistingFile(const String& path, uint32_t* FileType = NULL);
388	schoenebeck	2912	void ResizeFile(file_offset_t ullNewSize);
389	schoenebeck	798	#if POSIX
390	schoenebeck	2912	file_offset_t __GetFileSize(int hFile) const;
391	schoenebeck	1050	#elif defined(WIN32)
392	schoenebeck	2912	file_offset_t __GetFileSize(HANDLE hFile) const;
393	schoenebeck	798	#else
394	schoenebeck	2912	file_offset_t __GetFileSize(FILE* hFile) const;
395	schoenebeck	798	#endif
396	schoenebeck	2912	int FileOffsetSizeFor(file_offset_t fileSize) const;
397	persson	2155	void Cleanup();
398	schoenebeck	2	};
399
400	schoenebeck	1193	/**
401			* Will be thrown whenever an error occurs while handling a RIFF file.
402			*/
403	schoenebeck	2	class Exception {
404			public:
405			String Message;
406
407	persson	1713	Exception(String Message) { Exception::Message = Message; }
408	schoenebeck	2	void PrintMessage();
409	persson	1713	virtual ~Exception() {}
410	schoenebeck	2	};
411
412	schoenebeck	518	String libraryName();
413			String libraryVersion();
414
415	schoenebeck	2	} // namespace RIFF
416			#endif // __RIFF_H__