trunk/src/RIFF.h

/***************************************************************************
 *                                                                         *
 *   libgig - C++ cross-platform Gigasampler format file loader library    *
 *                                                                         *
 *   Copyright (C) 2003-2005 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__

#define POSIX 1
#define DEBUG 0

#include <string>
#include <list>
#include <map>
#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

#include <stdint.h>

//typedef unsigned char  uint8_t;
//typedef unsigned short uint16_t;
//typedef unsigned int   uint32_t;

#include <stdio.h>

#if WORDS_BIGENDIAN
# define CHUNK_ID_RIFF  0x52494646
# define CHUNK_ID_RIFX  0x52494658
# define CHUNK_ID_LIST  0x4C495354
#else  // little endian
# define CHUNK_ID_RIFF  0x46464952
# define CHUNK_ID_RIFX  0x58464952
# define CHUNK_ID_LIST  0x5453494C
#endif // WORDS_BIGENDIAN

#define CHUNK_HEADER_SIZE       8
#define LIST_HEADER_SIZE        12
#define RIFF_HEADER_SIZE        12


/** RIFF specific classes and definitions */
namespace RIFF {

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

    typedef std::string String;

    /** Whether file stream is open in read or in read/write mode. */
    typedef enum {
        stream_mode_read,
        stream_mode_read_write
    } 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;

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

            Chunk(File* pFile);
            Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize);
            void          ReadHeader(unsigned long fPos);
            void          WriteHeader(unsigned long fPos);
            unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize);
            inline void   swapBytes_16(void* Word) {
                uint8_t byteCache = *((uint8_t*) Word);
                *((uint8_t*) Word)     = *((uint8_t*) Word + 1);
                *((uint8_t*) Word + 1) = byteCache;
            }
            inline void   swapBytes_32(void* Word) {
                uint8_t byteCache = *((uint8_t*) Word);
                *((uint8_t*) Word)     = *((uint8_t*) Word + 3);
                *((uint8_t*) Word + 3) = byteCache;
                byteCache = *((uint8_t*) Word + 1);
                *((uint8_t*) Word + 1) = *((uint8_t*) Word + 2);
                *((uint8_t*) Word + 2) = byteCache;
            }
            inline void   swapBytes(void* Word, unsigned long WordSize) {
                uint8_t byteCache;
                unsigned long lo = 0, hi = WordSize - 1;
                for (; lo < hi; hi--, lo++) {
                    byteCache = *((uint8_t*) Word + lo);
                    *((uint8_t*) Word + lo) = *((uint8_t*) Word + hi);
                    *((uint8_t*) Word + hi) = byteCache;
                }
            }
            inline 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 unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
            virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.

            friend class List;
    };

    /** Provides convenient methods to access data of RIFF list chunks and their subchunks. */
    class List : public Chunk {
        public:
            List(File* pFile, unsigned long StartPos, List* Parent);
            String       GetListTypeString();
            uint32_t     GetListType() { 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();
            unsigned int CountSubChunks();
            unsigned int CountSubChunks(uint32_t ChunkID);
            unsigned int CountSubLists();
            unsigned int CountSubLists(uint32_t ListType);
            Chunk*       AddSubChunk(uint32_t uiChunkID, uint uiBodySize);
            List*        AddSubList(uint32_t uiListType);
            void         DeleteSubChunk(Chunk* pSubChunk);
            virtual ~List();
        protected:
            typedef std::map<uint32_t, RIFF::Chunk*>  ChunkMap;
            typedef std::list<Chunk*>                 ChunkList;

            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(unsigned long fPos);
            void WriteHeader(unsigned long fPos);
            void LoadSubChunks();
            virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
            virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
    };

    /** Parses arbitrary RIFF files and provides together with it's base classes convenient methods to walk through the RIFF tree. */
    class File : public List {
        public:
            File();
            File(const String& path);
            stream_mode_t GetMode();
            bool          SetMode(stream_mode_t NewMode);
            String GetFileName();
            virtual void Save();
            virtual void Save(const String& path);
            virtual ~File();
        protected:
            #if POSIX
            int    hFileRead;  ///< handle / descriptor for reading from file
            int    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;

            void LogAsResized(Chunk* pResizedChunk);
            friend class Chunk;
            friend class List;
        private:
            stream_mode_t  Mode;
            ChunkList      ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).

            unsigned long GetFileSize();
            void ResizeFile(unsigned long ulNewSize);
    };

    /** Will be thrown whenever an error occurs while parsing 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			* libgig - C++ cross-platform Gigasampler format file loader library *
4			* *
5	schoenebeck	384	* Copyright (C) 2003-2005 by Christian Schoenebeck *
6			* <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			#define POSIX 1
28			#define DEBUG 0
29
30			#include <string>
31			#include <list>
32			#include <map>
33			#include <iostream>
34
35	schoenebeck	11	#ifdef HAVE_CONFIG_H
36			# include <config.h>
37			#endif
38
39	schoenebeck	2	#if POSIX
40			# include <sys/types.h>
41			# include <sys/stat.h>
42			# include <fcntl.h>
43			# include <unistd.h>
44			#endif // POSIX
45
46			#include <stdint.h>
47
48			//typedef unsigned char uint8_t;
49			//typedef unsigned short uint16_t;
50			//typedef unsigned int uint32_t;
51
52			#include <stdio.h>
53
54			#if WORDS_BIGENDIAN
55			# define CHUNK_ID_RIFF 0x52494646
56			# define CHUNK_ID_RIFX 0x52494658
57			# define CHUNK_ID_LIST 0x4C495354
58			#else // little endian
59			# define CHUNK_ID_RIFF 0x46464952
60			# define CHUNK_ID_RIFX 0x58464952
61			# define CHUNK_ID_LIST 0x5453494C
62			#endif // WORDS_BIGENDIAN
63
64			#define CHUNK_HEADER_SIZE 8
65			#define LIST_HEADER_SIZE 12
66			#define RIFF_HEADER_SIZE 12
67
68
69			/** RIFF specific classes and definitions */
70			namespace RIFF {
71
72			/* just symbol prototyping */
73			class Chunk;
74			class List;
75	schoenebeck	780	class File;
76	schoenebeck	2
77			typedef std::string String;
78
79	schoenebeck	780	/** Whether file stream is open in read or in read/write mode. */
80			typedef enum {
81			stream_mode_read,
82			stream_mode_read_write
83			} stream_mode_t;
84
85	schoenebeck	2	/** Current state of the file stream. */
86			typedef enum {
87			stream_ready = 0,
88			stream_end_reached = 1,
89			stream_closed = 2
90			} stream_state_t;
91
92			/** File stream position dependent to these relations. */
93			typedef enum {
94			stream_start = 0,
95			stream_curpos = 1,
96			stream_backward = 2,
97			stream_end = 3
98			} stream_whence_t;
99
100			/** Provides convenient methods to access data of RIFF chunks in general. */
101			class Chunk {
102			public:
103	schoenebeck	780	Chunk(File* pFile, unsigned long StartPos, List* Parent);
104	schoenebeck	2	String GetChunkIDString();
105	schoenebeck	11	uint32_t GetChunkID() { return ChunkID; }; ///< Chunk ID in unsigned integer representation.
106			List* GetParent() { return pParent; }; ///< Returns pointer to the chunk's parent list chunk.
107	schoenebeck	780	unsigned long GetSize() { return CurrentChunkSize; }; ///< Chunk size in bytes (without header, thus the chunk data body)
108			unsigned long GetNewSize() { return NewChunkSize; }; ///< New chunk size if it was modified with Resize().
109	schoenebeck	11	unsigned long GetPos() { return ulPos; }; ///< Position within the chunk data body
110	schoenebeck	2	unsigned long GetFilePos() { return ulStartPos + ulPos; }; ///< Current, actual offset in file.
111			unsigned long SetPos(unsigned long Where, stream_whence_t Whence = stream_start);
112			unsigned long RemainingBytes();
113			stream_state_t GetState();
114			unsigned long Read(void* pData, unsigned long WordCount, unsigned long WordSize);
115			unsigned long ReadInt8(int8_t* pData, unsigned long WordCount = 1);
116			unsigned long ReadUint8(uint8_t* pData, unsigned long WordCount = 1);
117			unsigned long ReadInt16(int16_t* pData, unsigned long WordCount = 1);
118			unsigned long ReadUint16(uint16_t* pData, unsigned long WordCount = 1);
119			unsigned long ReadInt32(int32_t* pData, unsigned long WordCount = 1);
120			unsigned long ReadUint32(uint32_t* pData, unsigned long WordCount = 1);
121			int8_t ReadInt8();
122			uint8_t ReadUint8();
123			int16_t ReadInt16();
124			uint16_t ReadUint16();
125			int32_t ReadInt32();
126			uint32_t ReadUint32();
127	schoenebeck	780	unsigned long Write(void* pData, unsigned long WordCount, unsigned long WordSize);
128			unsigned long WriteInt8(int8_t* pData, unsigned long WordCount = 1);
129			unsigned long WriteUint8(uint8_t* pData, unsigned long WordCount = 1);
130			unsigned long WriteInt16(int16_t* pData, unsigned long WordCount = 1);
131			unsigned long WriteUint16(uint16_t* pData, unsigned long WordCount = 1);
132			unsigned long WriteInt32(int32_t* pData, unsigned long WordCount = 1);
133			unsigned long WriteUint32(uint32_t* pData, unsigned long WordCount = 1);
134			void* LoadChunkData();
135			void ReleaseChunkData();
136			void Resize(int iNewSize);
137	schoenebeck	384	virtual ~Chunk();
138	schoenebeck	2	protected:
139			uint32_t ChunkID;
140	schoenebeck	780	uint32_t CurrentChunkSize; /* in bytes */
141			uint32_t NewChunkSize; /* in bytes (if chunk was scheduled to be resized) */
142	schoenebeck	2	List* pParent;
143	schoenebeck	780	File* pFile;
144	schoenebeck	2	unsigned long ulStartPos; /* actual position in file where chunk (without header) starts */
145			unsigned long ulPos; /* # of bytes from ulStartPos */
146			uint8_t* pChunkData;
147
148	schoenebeck	780	Chunk(File* pFile);
149			Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize);
150	schoenebeck	2	void ReadHeader(unsigned long fPos);
151	schoenebeck	780	void WriteHeader(unsigned long fPos);
152	schoenebeck	2	unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize);
153			inline void swapBytes_16(void* Word) {
154			uint8_t byteCache = ((uint8_t) Word);
155			((uint8_t) Word) = ((uint8_t) Word + 1);
156			((uint8_t) Word + 1) = byteCache;
157			}
158			inline void swapBytes_32(void* Word) {
159			uint8_t byteCache = ((uint8_t) Word);
160			((uint8_t) Word) = ((uint8_t) Word + 3);
161			((uint8_t) Word + 3) = byteCache;
162			byteCache = ((uint8_t) Word + 1);
163			((uint8_t) Word + 1) = ((uint8_t) Word + 2);
164			((uint8_t) Word + 2) = byteCache;
165			}
166			inline void swapBytes(void* Word, unsigned long WordSize) {
167			uint8_t byteCache;
168			unsigned long lo = 0, hi = WordSize - 1;
169			for (; lo < hi; hi--, lo++) {
170			byteCache = ((uint8_t) Word + lo);
171			((uint8_t) Word + lo) = ((uint8_t) Word + hi);
172			((uint8_t) Word + hi) = byteCache;
173			}
174			}
175			inline String convertToString(uint32_t word) {
176			String result;
177			for (int i = 0; i < 4; i++) {
178			uint8_t byte = ((uint8_t)(&word) + i);
179			char c = byte;
180			result += c;
181			}
182			return result;
183			}
184	schoenebeck	780	virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
185			virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.
186
187			friend class List;
188	schoenebeck	2	};
189
190			/** Provides convenient methods to access data of RIFF list chunks and their subchunks. */
191			class List : public Chunk {
192			public:
193	schoenebeck	780	List(File* pFile, unsigned long StartPos, List* Parent);
194	schoenebeck	2	String GetListTypeString();
195	schoenebeck	11	uint32_t GetListType() { return ListType; } ///< Returns unsigned integer representation of the list's ID
196			Chunk* GetSubChunk(uint32_t ChunkID);
197			List* GetSubList(uint32_t ListType);
198	schoenebeck	2	Chunk* GetFirstSubChunk();
199			Chunk* GetNextSubChunk();
200			List* GetFirstSubList();
201			List* GetNextSubList();
202			unsigned int CountSubChunks();
203			unsigned int CountSubChunks(uint32_t ChunkID);
204			unsigned int CountSubLists();
205			unsigned int CountSubLists(uint32_t ListType);
206	schoenebeck	780	Chunk* AddSubChunk(uint32_t uiChunkID, uint uiBodySize);
207			List* AddSubList(uint32_t uiListType);
208			void DeleteSubChunk(Chunk* pSubChunk);
209	schoenebeck	384	virtual ~List();
210	schoenebeck	2	protected:
211			typedef std::map<uint32_t, RIFF::Chunk*> ChunkMap;
212			typedef std::list<Chunk*> ChunkList;
213
214			uint32_t ListType;
215			ChunkList* pSubChunks;
216			ChunkMap* pSubChunksMap;
217			ChunkList::iterator ChunksIterator;
218			ChunkList::iterator ListIterator;
219
220	schoenebeck	780	List(File* pFile);
221			List(File* pFile, List* pParent, uint32_t uiListID);
222	schoenebeck	2	void ReadHeader(unsigned long fPos);
223	schoenebeck	780	void WriteHeader(unsigned long fPos);
224	schoenebeck	2	void LoadSubChunks();
225	schoenebeck	780	virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
226			virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
227	schoenebeck	2	};
228
229			/** Parses arbitrary RIFF files and provides together with it's base classes convenient methods to walk through the RIFF tree. */
230			class File : public List {
231			public:
232	schoenebeck	780	File();
233	schoenebeck	2	File(const String& path);
234	schoenebeck	780	stream_mode_t GetMode();
235			bool SetMode(stream_mode_t NewMode);
236			String GetFileName();
237			virtual void Save();
238			virtual void Save(const String& path);
239	schoenebeck	384	virtual ~File();
240	schoenebeck	780	protected:
241			#if POSIX
242			int hFileRead; ///< handle / descriptor for reading from file
243			int hFileWrite; ///< handle / descriptor for writing to (some) file
244			#else
245			FILE* hFileRead; ///< handle / descriptor for reading from file
246			FILE* hFileWrite; ///< handle / descriptor for writing to (some) file
247			#endif // POSIX
248			String Filename;
249			bool bEndianNative;
250
251			void LogAsResized(Chunk* pResizedChunk);
252			friend class Chunk;
253			friend class List;
254	schoenebeck	2	private:
255	schoenebeck	780	stream_mode_t Mode;
256			ChunkList ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).
257
258	schoenebeck	2	unsigned long GetFileSize();
259	schoenebeck	780	void ResizeFile(unsigned long ulNewSize);
260	schoenebeck	2	};
261
262			/** Will be thrown whenever an error occurs while parsing a RIFF file. */
263			class Exception {
264			public:
265			String Message;
266
267			Exception(String Message) { Exception::Message = Message; };
268			void PrintMessage();
269			virtual ~Exception() {};
270			};
271
272	schoenebeck	518	String libraryName();
273			String libraryVersion();
274
275	schoenebeck	2	} // namespace RIFF
276			#endif // __RIFF_H__