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       = 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;

    /** 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;
            unsigned long ulChunkDataSize;

            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();
            void LoadSubChunksRecursively();
            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(uint32_t FileType);
            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);
            #if POSIX
            unsigned long __GetFileSize(int hFile);
            #else
            unsigned long __GetFileSize(FILE* hFile);
            #endif
    };

    /** 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	/***************************************************************************
2	* *
3	* libgig - C++ cross-platform Gigasampler format file loader library *
4	* *
5	* Copyright (C) 2003-2005 by Christian Schoenebeck *
6	* <cuse@users.sourceforge.net> *
7	* *
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	#ifdef HAVE_CONFIG_H
36	# include <config.h>
37	#endif
38
39	#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	class File;
76
77	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. */
87	typedef enum {
88	stream_ready = 0,
89	stream_end_reached = 1,
90	stream_closed = 2
91	} stream_state_t;
92
93	/** File stream position dependent to these relations. */
94	typedef enum {
95	stream_start = 0,
96	stream_curpos = 1,
97	stream_backward = 2,
98	stream_end = 3
99	} stream_whence_t;
100
101	/** Provides convenient methods to access data of RIFF chunks in general. */
102	class Chunk {
103	public:
104	Chunk(File* pFile, unsigned long StartPos, List* Parent);
105	String GetChunkIDString();
106	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.
108	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
111	unsigned long GetFilePos() { return ulStartPos + ulPos; }; ///< Current, actual offset in file.
112	unsigned long SetPos(unsigned long Where, stream_whence_t Whence = stream_start);
113	unsigned long RemainingBytes();
114	stream_state_t GetState();
115	unsigned long Read(void* pData, unsigned long WordCount, unsigned long WordSize);
116	unsigned long ReadInt8(int8_t* pData, unsigned long WordCount = 1);
117	unsigned long ReadUint8(uint8_t* pData, unsigned long WordCount = 1);
118	unsigned long ReadInt16(int16_t* pData, unsigned long WordCount = 1);
119	unsigned long ReadUint16(uint16_t* pData, unsigned long WordCount = 1);
120	unsigned long ReadInt32(int32_t* pData, unsigned long WordCount = 1);
121	unsigned long ReadUint32(uint32_t* pData, unsigned long WordCount = 1);
122	int8_t ReadInt8();
123	uint8_t ReadUint8();
124	int16_t ReadInt16();
125	uint16_t ReadUint16();
126	int32_t ReadInt32();
127	uint32_t ReadUint32();
128	unsigned long Write(void* pData, unsigned long WordCount, unsigned long WordSize);
129	unsigned long WriteInt8(int8_t* pData, unsigned long WordCount = 1);
130	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:
140	uint32_t ChunkID;
141	uint32_t CurrentChunkSize; /* in bytes */
142	uint32_t NewChunkSize; /* in bytes (if chunk was scheduled to be resized) */
143	List* pParent;
144	File* pFile;
145	unsigned long ulStartPos; /* actual position in file where chunk (without header) starts */
146	unsigned long ulPos; /* # of bytes from ulStartPos */
147	uint8_t* pChunkData;
148	unsigned long ulChunkDataSize;
149
150	Chunk(File* pFile);
151	Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize);
152	void ReadHeader(unsigned long fPos);
153	void WriteHeader(unsigned long fPos);
154	unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize);
155	inline void swapBytes_16(void* Word) {
156	uint8_t byteCache = ((uint8_t) Word);
157	((uint8_t) Word) = ((uint8_t) Word + 1);
158	((uint8_t) Word + 1) = byteCache;
159	}
160	inline void swapBytes_32(void* Word) {
161	uint8_t byteCache = ((uint8_t) Word);
162	((uint8_t) Word) = ((uint8_t) Word + 3);
163	((uint8_t) Word + 3) = byteCache;
164	byteCache = ((uint8_t) Word + 1);
165	((uint8_t) Word + 1) = ((uint8_t) Word + 2);
166	((uint8_t) Word + 2) = byteCache;
167	}
168	inline void swapBytes(void* Word, unsigned long WordSize) {
169	uint8_t byteCache;
170	unsigned long lo = 0, hi = WordSize - 1;
171	for (; lo < hi; hi--, lo++) {
172	byteCache = ((uint8_t) Word + lo);
173	((uint8_t) Word + lo) = ((uint8_t) Word + hi);
174	((uint8_t) Word + hi) = byteCache;
175	}
176	}
177	inline String convertToString(uint32_t word) {
178	String result;
179	for (int i = 0; i < 4; i++) {
180	uint8_t byte = ((uint8_t)(&word) + i);
181	char c = byte;
182	result += c;
183	}
184	return result;
185	}
186	virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
187	virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.
188
189	friend class List;
190	};
191
192	/** Provides convenient methods to access data of RIFF list chunks and their subchunks. */
193	class List : public Chunk {
194	public:
195	List(File* pFile, unsigned long StartPos, List* Parent);
196	String GetListTypeString();
197	uint32_t GetListType() { return ListType; } ///< Returns unsigned integer representation of the list's ID
198	Chunk* GetSubChunk(uint32_t ChunkID);
199	List* GetSubList(uint32_t ListType);
200	Chunk* GetFirstSubChunk();
201	Chunk* GetNextSubChunk();
202	List* GetFirstSubList();
203	List* GetNextSubList();
204	unsigned int CountSubChunks();
205	unsigned int CountSubChunks(uint32_t ChunkID);
206	unsigned int CountSubLists();
207	unsigned int CountSubLists(uint32_t ListType);
208	Chunk* AddSubChunk(uint32_t uiChunkID, uint uiBodySize);
209	List* AddSubList(uint32_t uiListType);
210	void DeleteSubChunk(Chunk* pSubChunk);
211	virtual ~List();
212	protected:
213	typedef std::map<uint32_t, RIFF::Chunk*> ChunkMap;
214	typedef std::list<Chunk*> ChunkList;
215
216	uint32_t ListType;
217	ChunkList* pSubChunks;
218	ChunkMap* pSubChunksMap;
219	ChunkList::iterator ChunksIterator;
220	ChunkList::iterator ListIterator;
221
222	List(File* pFile);
223	List(File* pFile, List* pParent, uint32_t uiListID);
224	void ReadHeader(unsigned long fPos);
225	void WriteHeader(unsigned long fPos);
226	void LoadSubChunks();
227	void LoadSubChunksRecursively();
228	virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
229	virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
230	};
231
232	/** Parses arbitrary RIFF files and provides together with it's base classes convenient methods to walk through the RIFF tree. */
233	class File : public List {
234	public:
235	File(uint32_t FileType);
236	File(const String& path);
237	stream_mode_t GetMode();
238	bool SetMode(stream_mode_t NewMode);
239	String GetFileName();
240	virtual void Save();
241	virtual void Save(const String& path);
242	virtual ~File();
243	protected:
244	#if POSIX
245	int hFileRead; ///< handle / descriptor for reading from file
246	int hFileWrite; ///< handle / descriptor for writing to (some) file
247	#else
248	FILE* hFileRead; ///< handle / descriptor for reading from file
249	FILE* hFileWrite; ///< handle / descriptor for writing to (some) file
250	#endif // POSIX
251	String Filename;
252	bool bEndianNative;
253
254	void LogAsResized(Chunk* pResizedChunk);
255	friend class Chunk;
256	friend class List;
257	private:
258	stream_mode_t Mode;
259	ChunkList ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).
260
261	unsigned long GetFileSize();
262	void ResizeFile(unsigned long ulNewSize);
263	#if POSIX
264	unsigned long __GetFileSize(int hFile);
265	#else
266	unsigned long __GetFileSize(FILE* hFile);
267	#endif
268	};
269
270	/** Will be thrown whenever an error occurs while parsing a RIFF file. */
271	class Exception {
272	public:
273	String Message;
274
275	Exception(String Message) { Exception::Message = Message; };
276	void PrintMessage();
277	virtual ~Exception() {};
278	};
279
280	String libraryName();
281	String libraryVersion();
282
283	} // namespace RIFF
284	#endif // __RIFF_H__