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/*************************************************************************** |
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* * |
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* libgig - C++ cross-platform Gigasampler format file access library * |
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* * |
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* Copyright (C) 2003-2007 by Christian Schoenebeck * |
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* <cuse@users.sourceforge.net> * |
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* * |
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* This library is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This library is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this library; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#ifndef __RIFF_H__ |
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#define __RIFF_H__ |
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|
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#ifdef WIN32 |
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# define POSIX 0 |
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#endif |
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|
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#ifndef POSIX |
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# define POSIX 1 |
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#endif |
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|
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#ifndef DEBUG |
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# define DEBUG 0 |
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#endif |
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|
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#include <string> |
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#include <list> |
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#include <map> |
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#include <iostream> |
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|
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#ifdef HAVE_CONFIG_H |
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# include <config.h> |
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#endif |
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|
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#if POSIX |
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# include <sys/types.h> |
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# include <sys/stat.h> |
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# include <fcntl.h> |
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# include <unistd.h> |
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#endif // POSIX |
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|
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#include <stdint.h> |
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|
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#ifdef WIN32 |
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# include <windows.h> |
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typedef unsigned int uint; |
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#endif // WIN32 |
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|
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#include <stdio.h> |
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|
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#if WORDS_BIGENDIAN |
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# define CHUNK_ID_RIFF 0x52494646 |
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# define CHUNK_ID_RIFX 0x52494658 |
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# define CHUNK_ID_LIST 0x4C495354 |
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#else // little endian |
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# define CHUNK_ID_RIFF 0x46464952 |
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# define CHUNK_ID_RIFX 0x58464952 |
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# define CHUNK_ID_LIST 0x5453494C |
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#endif // WORDS_BIGENDIAN |
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|
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#define CHUNK_HEADER_SIZE 8 |
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#define LIST_HEADER_SIZE 12 |
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#define RIFF_HEADER_SIZE 12 |
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|
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|
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/** |
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* @brief RIFF specific classes and definitions |
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* |
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* The Resource Interchange File Format (RIFF) is a generic tree-structured |
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* meta-format which stores data in so called "chunks". It can be compared |
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* to XML, but in contrast to XML, RIFF is entirely binary encoded, that is |
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* not ASCII based. RIFF is used as basis for many file formats like AVI, |
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* WAV, DLS and of course the Gigasampler file format. ;-) |
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* |
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* RIFF chunks can be seen as containers for data. There are two distinct |
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* types of chunks: |
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* |
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* - @e ordinary @e chunks are the leafs of the data tree which encapsulate |
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* the actual data of the file (i.e. the sample data of a .wav file) |
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* |
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* - @e list @e chunks are the nodes of the data tree which hold an |
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* arbitrary amount of subchunks (can be both, list chunks and/or ordinary |
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* chunks) |
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*/ |
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namespace RIFF { |
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|
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/* just symbol prototyping */ |
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class Chunk; |
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class List; |
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class File; |
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|
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typedef std::string String; |
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|
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/** Whether file stream is open in read or in read/write mode. */ |
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typedef enum { |
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stream_mode_read = 0, |
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stream_mode_read_write = 1, |
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stream_mode_closed = 2 |
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} stream_mode_t; |
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|
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/** Current state of the file stream. */ |
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typedef enum { |
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stream_ready = 0, |
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stream_end_reached = 1, |
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stream_closed = 2 |
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} stream_state_t; |
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|
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/** File stream position dependent to these relations. */ |
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typedef enum { |
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stream_start = 0, |
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stream_curpos = 1, |
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stream_backward = 2, |
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stream_end = 3 |
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} stream_whence_t; |
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|
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/** Alignment of data bytes in memory (system dependant). */ |
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typedef enum { |
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endian_little = 0, |
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endian_big = 1, |
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endian_native = 2 |
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} endian_t; |
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|
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/** @brief Ordinary RIFF Chunk |
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* |
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* Provides convenient methods to access data of ordinary RIFF chunks |
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* in general. |
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*/ |
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class Chunk { |
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public: |
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Chunk(File* pFile, unsigned long StartPos, List* Parent); |
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String GetChunkIDString(); |
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uint32_t GetChunkID() { return ChunkID; }; ///< Chunk ID in unsigned integer representation. |
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List* GetParent() { return pParent; }; ///< Returns pointer to the chunk's parent list chunk. |
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unsigned long GetSize() { return CurrentChunkSize; }; ///< Chunk size in bytes (without header, thus the chunk data body) |
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unsigned long GetNewSize() { return NewChunkSize; }; ///< New chunk size if it was modified with Resize(). |
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unsigned long GetPos() { return ulPos; }; ///< Position within the chunk data body |
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unsigned long GetFilePos() { return ulStartPos + ulPos; }; ///< Current, actual offset in file. |
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unsigned long SetPos(unsigned long Where, stream_whence_t Whence = stream_start); |
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unsigned long RemainingBytes(); |
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stream_state_t GetState(); |
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unsigned long Read(void* pData, unsigned long WordCount, unsigned long WordSize); |
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unsigned long ReadInt8(int8_t* pData, unsigned long WordCount = 1); |
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unsigned long ReadUint8(uint8_t* pData, unsigned long WordCount = 1); |
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unsigned long ReadInt16(int16_t* pData, unsigned long WordCount = 1); |
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unsigned long ReadUint16(uint16_t* pData, unsigned long WordCount = 1); |
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unsigned long ReadInt32(int32_t* pData, unsigned long WordCount = 1); |
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unsigned long ReadUint32(uint32_t* pData, unsigned long WordCount = 1); |
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int8_t ReadInt8(); |
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uint8_t ReadUint8(); |
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int16_t ReadInt16(); |
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uint16_t ReadUint16(); |
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int32_t ReadInt32(); |
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uint32_t ReadUint32(); |
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unsigned long Write(void* pData, unsigned long WordCount, unsigned long WordSize); |
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unsigned long WriteInt8(int8_t* pData, unsigned long WordCount = 1); |
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unsigned long WriteUint8(uint8_t* pData, unsigned long WordCount = 1); |
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unsigned long WriteInt16(int16_t* pData, unsigned long WordCount = 1); |
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unsigned long WriteUint16(uint16_t* pData, unsigned long WordCount = 1); |
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unsigned long WriteInt32(int32_t* pData, unsigned long WordCount = 1); |
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unsigned long WriteUint32(uint32_t* pData, unsigned long WordCount = 1); |
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void* LoadChunkData(); |
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void ReleaseChunkData(); |
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void Resize(int iNewSize); |
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virtual ~Chunk(); |
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protected: |
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uint32_t ChunkID; |
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uint32_t CurrentChunkSize; /* in bytes */ |
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uint32_t NewChunkSize; /* in bytes (if chunk was scheduled to be resized) */ |
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List* pParent; |
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File* pFile; |
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unsigned long ulStartPos; /* actual position in file where chunk (without header) starts */ |
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unsigned long ulPos; /* # of bytes from ulStartPos */ |
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uint8_t* pChunkData; |
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unsigned long ulChunkDataSize; |
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|
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Chunk(File* pFile); |
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Chunk(File* pFile, List* pParent, uint32_t uiChunkID, uint uiBodySize); |
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void ReadHeader(unsigned long fPos); |
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void WriteHeader(unsigned long fPos); |
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unsigned long ReadSceptical(void* pData, unsigned long WordCount, unsigned long WordSize); |
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inline void swapBytes_16(void* Word) { |
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uint8_t byteCache = *((uint8_t*) Word); |
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*((uint8_t*) Word) = *((uint8_t*) Word + 1); |
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*((uint8_t*) Word + 1) = byteCache; |
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} |
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inline void swapBytes_32(void* Word) { |
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uint8_t byteCache = *((uint8_t*) Word); |
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*((uint8_t*) Word) = *((uint8_t*) Word + 3); |
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*((uint8_t*) Word + 3) = byteCache; |
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byteCache = *((uint8_t*) Word + 1); |
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*((uint8_t*) Word + 1) = *((uint8_t*) Word + 2); |
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*((uint8_t*) Word + 2) = byteCache; |
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} |
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inline void swapBytes(void* Word, unsigned long WordSize) { |
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uint8_t byteCache; |
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unsigned long lo = 0, hi = WordSize - 1; |
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for (; lo < hi; hi--, lo++) { |
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byteCache = *((uint8_t*) Word + lo); |
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*((uint8_t*) Word + lo) = *((uint8_t*) Word + hi); |
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*((uint8_t*) Word + hi) = byteCache; |
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} |
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} |
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inline String convertToString(uint32_t word) { |
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String result; |
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for (int i = 0; i < 4; i++) { |
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uint8_t byte = *((uint8_t*)(&word) + i); |
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char c = byte; |
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result += c; |
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} |
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return result; |
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} |
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virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset); |
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virtual void __resetPos(); ///< Sets Chunk's read/write position to zero. |
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|
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friend class List; |
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}; |
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|
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/** @brief RIFF List Chunk |
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* |
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* Provides convenient methods to access data of RIFF list chunks and |
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* their subchunks. |
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*/ |
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class List : public Chunk { |
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public: |
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List(File* pFile, unsigned long StartPos, List* Parent); |
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String GetListTypeString(); |
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uint32_t GetListType() { return ListType; } ///< Returns unsigned integer representation of the list's ID |
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Chunk* GetSubChunk(uint32_t ChunkID); |
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List* GetSubList(uint32_t ListType); |
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Chunk* GetFirstSubChunk(); |
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Chunk* GetNextSubChunk(); |
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List* GetFirstSubList(); |
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List* GetNextSubList(); |
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unsigned int CountSubChunks(); |
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unsigned int CountSubChunks(uint32_t ChunkID); |
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unsigned int CountSubLists(); |
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unsigned int CountSubLists(uint32_t ListType); |
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Chunk* AddSubChunk(uint32_t uiChunkID, uint uiBodySize); |
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List* AddSubList(uint32_t uiListType); |
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void DeleteSubChunk(Chunk* pSubChunk); |
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void MoveSubChunk(Chunk* pSrc, Chunk* pDst); |
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virtual ~List(); |
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protected: |
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typedef std::map<uint32_t, RIFF::Chunk*> ChunkMap; |
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typedef std::list<Chunk*> ChunkList; |
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|
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uint32_t ListType; |
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ChunkList* pSubChunks; |
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ChunkMap* pSubChunksMap; |
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ChunkList::iterator ChunksIterator; |
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ChunkList::iterator ListIterator; |
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|
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List(File* pFile); |
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List(File* pFile, List* pParent, uint32_t uiListID); |
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void ReadHeader(unsigned long fPos); |
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void WriteHeader(unsigned long fPos); |
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void LoadSubChunks(); |
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void LoadSubChunksRecursively(); |
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virtual unsigned long WriteChunk(unsigned long ulWritePos, unsigned long ulCurrentDataOffset); |
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virtual void __resetPos(); ///< Sets List Chunk's read/write position to zero and causes all sub chunks to do the same. |
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}; |
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|
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/** @brief RIFF File |
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* |
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* Handles arbitrary RIFF files and provides together with its base |
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* classes convenient methods to walk through, read and modify the |
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* file's RIFF tree. |
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*/ |
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class File : public List { |
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public: |
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File(uint32_t FileType); |
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File(const String& path); |
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stream_mode_t GetMode(); |
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bool SetMode(stream_mode_t NewMode); |
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void SetByteOrder(endian_t Endian); |
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String GetFileName(); |
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virtual void Save(); |
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virtual void Save(const String& path); |
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virtual ~File(); |
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protected: |
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#if POSIX |
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int hFileRead; ///< handle / descriptor for reading from file |
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int hFileWrite; ///< handle / descriptor for writing to (some) file |
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#elif defined(WIN32) |
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HANDLE hFileRead; ///< handle / descriptor for reading from file |
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HANDLE hFileWrite; ///< handle / descriptor for writing to (some) file |
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#else |
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FILE* hFileRead; ///< handle / descriptor for reading from file |
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FILE* hFileWrite; ///< handle / descriptor for writing to (some) file |
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#endif // POSIX |
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String Filename; |
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bool bEndianNative; |
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|
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void LogAsResized(Chunk* pResizedChunk); |
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void UnlogResized(Chunk* pResizedChunk); |
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friend class Chunk; |
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friend class List; |
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private: |
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stream_mode_t Mode; |
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ChunkList ResizedChunks; ///< All chunks which have been resized (enlarged / shortened). |
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|
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unsigned long GetFileSize(); |
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void ResizeFile(unsigned long ulNewSize); |
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#if POSIX |
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unsigned long __GetFileSize(int hFile); |
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#elif defined(WIN32) |
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unsigned long __GetFileSize(HANDLE hFile); |
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#else |
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unsigned long __GetFileSize(FILE* hFile); |
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#endif |
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}; |
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|
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/** |
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* Will be thrown whenever an error occurs while handling a RIFF file. |
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*/ |
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class Exception { |
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public: |
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String Message; |
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|
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Exception(String Message) { Exception::Message = Message; }; |
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void PrintMessage(); |
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virtual ~Exception() {}; |
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}; |
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|
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String libraryName(); |
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String libraryVersion(); |
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|
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} // namespace RIFF |
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#endif // __RIFF_H__ |
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