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/*
Rosegarden
A sequencer and musical notation editor.
This program is Copyright 2000-2008
Guillaume Laurent <glaurent@telegraph-road.org>,
Chris Cannam <cannam@all-day-breakfast.com>,
Richard Bown <bownie@bownie.com>
The moral right of the authors to claim authorship of this work
has been asserted.
This program 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. See the file
COPYING included with this distribution for more information.
*/
#ifndef _SOUNDFILE_H_
#define _SOUNDFILE_H_
// SoundFile is an abstract base class defining behaviour for both
// MidiFiles and AudioFiles. The getBytes routine is buffered into
// suitably sized chunks to prevent excessive file reads.
//
//
#include <iostream>
#include <fstream>
#include <string>
#include "Exception.h"
namespace Rosegarden
{
// Constants related to RIFF/WAV files
//
const std::string AUDIO_RIFF_ID = "RIFF";
const std::string AUDIO_WAVE_ID = "WAVE";
const std::string AUDIO_FORMAT_ID = "fmt "; // Always four bytes
const std::string AUDIO_BWF_ID = "bext"; // BWF chunk id
const std::string AUDIO_BWF_PEAK_ID = "levl"; // BWF peak chunk id
const float SAMPLE_MAX_8BIT = (float)(0xff);
const float SAMPLE_MAX_16BIT = (float)(0xffff/2);
const float SAMPLE_MAX_24BIT = (float)(0xffffff/2);
typedef unsigned char FileByte;
class SoundFile
{
public:
SoundFile(const std::string &fileName);
virtual ~SoundFile();
class BadSoundFileException : public Exception
{
public:
BadSoundFileException(std::string path) :
Exception("Bad sound file " + path), m_path(path) { }
BadSoundFileException(std::string path, std::string message) :
Exception("Bad sound file " + path + ": " + message), m_path(path) { }
BadSoundFileException(std::string path, std::string file, int line) :
Exception("Bad sound file " + path, file, line), m_path(path) { }
~BadSoundFileException() throw() { }
std::string getPath() const { return m_path; }
private:
std::string m_path;
};
// All files should be able open, write and close
virtual bool open() = 0;
virtual bool write() = 0;
virtual void close() = 0;
std::string getShortFilename() const;
std::string getFilename() const { return m_fileName; }
void setFilename(const std::string &fileName) { m_fileName = fileName; }
// Useful methods that operate on our file data
//
int getIntegerFromLittleEndian(const std::string &s);
std::string getLittleEndianFromInteger(unsigned int value,
unsigned int length);
int getIntegerFromBigEndian(const std::string &s);
std::string getBigEndianFromInteger(unsigned int value,
unsigned int length);
// Buffered read - allow this to be public
//
std::string getBytes(unsigned int numberOfBytes);
// Return file size
//
unsigned int getSize() const { return m_fileSize; }
void resetStream() { m_inFile->seekg(0); m_inFile->clear(); }
// check EOF status
//
bool isEof() const
{ if (m_inFile) return m_inFile->eof(); else return true; }
protected:
std::string m_fileName;
// get some bytes from an input stream - unbuffered as we can
// modify the file stream
std::string getBytes(std::ifstream *file, unsigned int numberOfBytes);
// Get n bytes from an input stream and write them into buffer.
// Return the actual number of bytes read.
size_t getBytes(std::ifstream *file, char *buffer, size_t n);
// write some bytes to an output stream
void putBytes(std::ofstream *file, const std::string outputString);
// write some bytes to an output stream
void putBytes(std::ofstream *file, const char *buffer, size_t n);
// Read buffering - define chunk size and buffer file reading
//
int m_readChunkPtr;
int m_readChunkSize;
std::string m_readBuffer;
std::ifstream *m_inFile;
std::ofstream *m_outFile;
bool m_loseBuffer; // do we need to dump the read buffer
// and re-fill it?
unsigned int m_fileSize;
};
}
#endif // _SOUNDFILE_H_
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