trunk/src/RIFF.h

/***************************************************************************
 *                                                                         *
 *   libgig - C++ cross-platform Gigasampler format file access library    *
 *                                                                         *
 *   Copyright (C) 2003-2007 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 <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>

#ifdef WIN32
# include "../win32/libgig_private.h" // like config.h, automatically generated by Dev-C++
# include <windows.h>
  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
#endif // WIN32

#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
            #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;

            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);
            #elif defined(WIN32)
            unsigned long __GetFileSize(HANDLE 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 access library *
4	* *
5	* Copyright (C) 2003-2007 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	#ifdef WIN32
28	# define POSIX 0
29	#endif
30
31	#ifndef POSIX
32	# define POSIX 1
33	#endif
34
35	#ifndef DEBUG
36	# define DEBUG 0
37	#endif
38
39	#include <string>
40	#include <list>
41	#include <map>
42	#include <iostream>
43
44	#ifdef HAVE_CONFIG_H
45	# include <config.h>
46	#endif
47
48	#if POSIX
49	# include <sys/types.h>
50	# include <sys/stat.h>
51	# include <fcntl.h>
52	# include <unistd.h>
53	#endif // POSIX
54
55	#include <stdint.h>
56
57	#ifdef WIN32
58	# include "../win32/libgig_private.h" // like config.h, automatically generated by Dev-C++
59	# include <windows.h>
60	typedef unsigned int uint;
61	typedef unsigned char uint8_t;
62	typedef unsigned short uint16_t;
63	typedef unsigned int uint32_t;
64	# define PACKAGE "libgig"
65	# define VERSION VER_STRING // VER_STRING defined in libgig_private.h
66	#endif // WIN32
67
68	#include <stdio.h>
69
70	#if WORDS_BIGENDIAN
71	# define CHUNK_ID_RIFF 0x52494646
72	# define CHUNK_ID_RIFX 0x52494658
73	# define CHUNK_ID_LIST 0x4C495354
74	#else // little endian
75	# define CHUNK_ID_RIFF 0x46464952
76	# define CHUNK_ID_RIFX 0x58464952
77	# define CHUNK_ID_LIST 0x5453494C
78	#endif // WORDS_BIGENDIAN
79
80	#define CHUNK_HEADER_SIZE 8
81	#define LIST_HEADER_SIZE 12
82	#define RIFF_HEADER_SIZE 12
83
84
85	/** RIFF specific classes and definitions */
86	namespace RIFF {
87
88	/* just symbol prototyping */
89	class Chunk;
90	class List;
91	class File;
92
93	typedef std::string String;
94
95	/** Whether file stream is open in read or in read/write mode. */
96	typedef enum {
97	stream_mode_read = 0,
98	stream_mode_read_write = 1,
99	stream_mode_closed = 2
100	} stream_mode_t;
101
102	/** Current state of the file stream. */
103	typedef enum {
104	stream_ready = 0,
105	stream_end_reached = 1,
106	stream_closed = 2
107	} stream_state_t;
108
109	/** File stream position dependent to these relations. */
110	typedef enum {
111	stream_start = 0,
112	stream_curpos = 1,
113	stream_backward = 2,
114	stream_end = 3
115	} stream_whence_t;
116
117	/** Provides convenient methods to access data of RIFF chunks in general. */
118	class Chunk {
119	public:
120	Chunk(File* pFile, unsigned long StartPos, List* Parent);
121	String GetChunkIDString();
122	uint32_t GetChunkID() { return ChunkID; }; ///< Chunk ID in unsigned integer representation.
123	List* GetParent() { return pParent; }; ///< Returns pointer to the chunk's parent list chunk.
124	unsigned long GetSize() { return CurrentChunkSize; }; ///< Chunk size in bytes (without header, thus the chunk data body)
125	unsigned long GetNewSize() { return NewChunkSize; }; ///< New chunk size if it was modified with Resize().
126	unsigned long GetPos() { return ulPos; }; ///< Position within the chunk data body
127	unsigned long GetFilePos() { return ulStartPos + ulPos; }; ///< Current, actual offset in file.
128	unsigned long SetPos(unsigned long Where, stream_whence_t Whence = stream_start);
129	unsigned long RemainingBytes();
130	stream_state_t GetState();
131	unsigned long Read(void* pData, unsigned long WordCount, unsigned long WordSize);
132	unsigned long ReadInt8(int8_t* pData, unsigned long WordCount = 1);
133	unsigned long ReadUint8(uint8_t* pData, unsigned long WordCount = 1);
134	unsigned long ReadInt16(int16_t* pData, unsigned long WordCount = 1);
135	unsigned long ReadUint16(uint16_t* pData, unsigned long WordCount = 1);
136	unsigned long ReadInt32(int32_t* pData, unsigned long WordCount = 1);
137	unsigned long ReadUint32(uint32_t* pData, unsigned long WordCount = 1);
138	int8_t ReadInt8();
139	uint8_t ReadUint8();
140	int16_t ReadInt16();
141	uint16_t ReadUint16();
142	int32_t ReadInt32();
143	uint32_t ReadUint32();
144	unsigned long Write(void* pData, unsigned long WordCount, unsigned long WordSize);
145	unsigned long WriteInt8(int8_t* pData, unsigned long WordCount = 1);
146	unsigned long WriteUint8(uint8_t* pData, unsigned long WordCount = 1);
147	unsigned long WriteInt16(int16_t* pData, unsigned long WordCount = 1);
148	unsigned long WriteUint16(uint16_t* pData, unsigned long WordCount = 1);
149	unsigned long WriteInt32(int32_t* pData, unsigned long WordCount = 1);
150	unsigned long WriteUint32(uint32_t* pData, unsigned long WordCount = 1);
151	void* LoadChunkData();
152	void ReleaseChunkData();
153	void Resize(int iNewSize);
154	virtual ~Chunk();
155	protected:
156	uint32_t ChunkID;
157	uint32_t CurrentChunkSize; /* in bytes */
158	uint32_t NewChunkSize; /* in bytes (if chunk was scheduled to be resized) */
159	List* pParent;
160	File* pFile;
161	unsigned long ulStartPos; /* actual position in file where chunk (without header) starts */
162	unsigned long ulPos; /* # of bytes from ulStartPos */
163	uint8_t* pChunkData;
164	unsigned long ulChunkDataSize;
165
166	Chunk(File* pFile);
167	Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize);
168	void ReadHeader(unsigned long fPos);
169	void WriteHeader(unsigned long fPos);
170	unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize);
171	inline void swapBytes_16(void* Word) {
172	uint8_t byteCache = ((uint8_t) Word);
173	((uint8_t) Word) = ((uint8_t) Word + 1);
174	((uint8_t) Word + 1) = byteCache;
175	}
176	inline void swapBytes_32(void* Word) {
177	uint8_t byteCache = ((uint8_t) Word);
178	((uint8_t) Word) = ((uint8_t) Word + 3);
179	((uint8_t) Word + 3) = byteCache;
180	byteCache = ((uint8_t) Word + 1);
181	((uint8_t) Word + 1) = ((uint8_t) Word + 2);
182	((uint8_t) Word + 2) = byteCache;
183	}
184	inline void swapBytes(void* Word, unsigned long WordSize) {
185	uint8_t byteCache;
186	unsigned long lo = 0, hi = WordSize - 1;
187	for (; lo < hi; hi--, lo++) {
188	byteCache = ((uint8_t) Word + lo);
189	((uint8_t) Word + lo) = ((uint8_t) Word + hi);
190	((uint8_t) Word + hi) = byteCache;
191	}
192	}
193	inline String convertToString(uint32_t word) {
194	String result;
195	for (int i = 0; i < 4; i++) {
196	uint8_t byte = ((uint8_t)(&word) + i);
197	char c = byte;
198	result += c;
199	}
200	return result;
201	}
202	virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
203	virtual void __resetPos(); ///< Sets Chunk's read/write position to zero.
204
205	friend class List;
206	};
207
208	/** Provides convenient methods to access data of RIFF list chunks and their subchunks. */
209	class List : public Chunk {
210	public:
211	List(File* pFile, unsigned long StartPos, List* Parent);
212	String GetListTypeString();
213	uint32_t GetListType() { return ListType; } ///< Returns unsigned integer representation of the list's ID
214	Chunk* GetSubChunk(uint32_t ChunkID);
215	List* GetSubList(uint32_t ListType);
216	Chunk* GetFirstSubChunk();
217	Chunk* GetNextSubChunk();
218	List* GetFirstSubList();
219	List* GetNextSubList();
220	unsigned int CountSubChunks();
221	unsigned int CountSubChunks(uint32_t ChunkID);
222	unsigned int CountSubLists();
223	unsigned int CountSubLists(uint32_t ListType);
224	Chunk* AddSubChunk(uint32_t uiChunkID, uint uiBodySize);
225	List* AddSubList(uint32_t uiListType);
226	void DeleteSubChunk(Chunk* pSubChunk);
227	virtual ~List();
228	protected:
229	typedef std::map<uint32_t, RIFF::Chunk*> ChunkMap;
230	typedef std::list<Chunk*> ChunkList;
231
232	uint32_t ListType;
233	ChunkList* pSubChunks;
234	ChunkMap* pSubChunksMap;
235	ChunkList::iterator ChunksIterator;
236	ChunkList::iterator ListIterator;
237
238	List(File* pFile);
239	List(File* pFile, List* pParent, uint32_t uiListID);
240	void ReadHeader(unsigned long fPos);
241	void WriteHeader(unsigned long fPos);
242	void LoadSubChunks();
243	void LoadSubChunksRecursively();
244	virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset);
245	virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same.
246	};
247
248	/** Parses arbitrary RIFF files and provides together with it's base classes convenient methods to walk through the RIFF tree. */
249	class File : public List {
250	public:
251	File(uint32_t FileType);
252	File(const String& path);
253	stream_mode_t GetMode();
254	bool SetMode(stream_mode_t NewMode);
255	String GetFileName();
256	virtual void Save();
257	virtual void Save(const String& path);
258	virtual ~File();
259	protected:
260	#if POSIX
261	int hFileRead; ///< handle / descriptor for reading from file
262	int hFileWrite; ///< handle / descriptor for writing to (some) file
263	#elif defined(WIN32)
264	HANDLE hFileRead; ///< handle / descriptor for reading from file
265	HANDLE hFileWrite; ///< handle / descriptor for writing to (some) file
266	#else
267	FILE* hFileRead; ///< handle / descriptor for reading from file
268	FILE* hFileWrite; ///< handle / descriptor for writing to (some) file
269	#endif // POSIX
270	String Filename;
271	bool bEndianNative;
272
273	void LogAsResized(Chunk* pResizedChunk);
274	friend class Chunk;
275	friend class List;
276	private:
277	stream_mode_t Mode;
278	ChunkList ResizedChunks; ///< All chunks which have been resized (enlarged / shortened).
279
280	unsigned long GetFileSize();
281	void ResizeFile(unsigned long ulNewSize);
282	#if POSIX
283	unsigned long __GetFileSize(int hFile);
284	#elif defined(WIN32)
285	unsigned long __GetFileSize(HANDLE hFile);
286	#else
287	unsigned long __GetFileSize(FILE* hFile);
288	#endif
289	};
290
291	/** Will be thrown whenever an error occurs while parsing a RIFF file. */
292	class Exception {
293	public:
294	String Message;
295
296	Exception(String Message) { Exception::Message = Message; };
297	void PrintMessage();
298	virtual ~Exception() {};
299	};
300
301	String libraryName();
302	String libraryVersion();
303
304	} // namespace RIFF
305	#endif // __RIFF_H__