/usr/include/itpp/srccode/audiofile.h is in libitpp-dev 4.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* \file
* \brief Definitions of audio Audio classes and functions
* \author Tobias Ringstrom and Adam Piatyszek
*
* -------------------------------------------------------------------------
*
* Copyright (C) 1995-2010 (see AUTHORS file for a list of contributors)
*
* This file is part of IT++ - a C++ library of mathematical, signal
* processing, speech processing, and communications classes and functions.
*
* IT++ 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 3 of the License, or (at your option) any
* later version.
*
* IT++ 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 IT++. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef AUDIOFILE_H
#define AUDIOFILE_H
#include <itpp/base/vec.h>
#include <itpp/base/math/misc.h>
#include <fstream>
namespace itpp
{
//! \cond
#define SND_INFO_LEN 8
//! \endcond
/*!
\addtogroup audio
*/
/*!
\brief Base class - do not use this one!
\ingroup audio
ACTION: ADD DETAILED DOCUMENTATION FOR THIS CLASS!!!!!!!!!!!
*/
class Audio_File
{
public:
//!Constructor
Audio_File();
//!Destructor
virtual ~Audio_File() { }
//!Returns true if everything is OK.
bool good() { return is_valid && file.good(); }
protected:
//! ACTION: Add documentation for this protected member
std::fstream file;
//! ACTION: Add documentation for this protected member
bool is_valid;
};
/*!
\brief Base class for SND reading classes (the .au format)
\ingroup audio
ACTION: ADD DETAILED DOCUMENTATION FOR THIS CLASS!!!!!!!!!!!
*/
class SND_Format
{
public:
//! ACTION: ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
enum data_encoding { enc_unknown = 0,
enc_mulaw8 = 1,
enc_alaw8 = 27,
enc_linear8 = 2,
enc_linear16 = 3,
enc_linear24 = 4,
enc_linear32 = 5,
enc_float = 6,
enc_double = 7
};
//! ACTION: ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
int samples() const { return header.data_size / sample_size(); }
//! ACTION: ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
data_encoding encoding() const { return (data_encoding)header.encoding; }
//! ACTION: ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
int rate() const { return header.sample_rate; }
//! ACTION: ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
void set_rate(int r) { header.sample_rate = r; }
//! ACTION: ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
int channels() const { return header.channels; }
protected:
struct {
//! Magic number
unsigned magic;
//! Size of this header
unsigned hdr_size;
//! Length of data (optional)
unsigned data_size;
//! Data encoding format
unsigned encoding;
//! Samples per second
unsigned sample_rate;
//! Number of interleaved channels
unsigned channels;
//! Info string
char info[SND_INFO_LEN];
} header; //!< Definition of the header structure
//! ACTION: Add documentation for this protected member
int sample_size() const;
//! ACTION: Add documentation for this protected member
bool read_header(std::istream &f);
//! ACTION: Add documentation for this protected member
bool write_header(std::ostream &f);
};
/*!
\brief A class to read SND-files (the .au format)
\ingroup audio
ACTION: ADD DETAILED DOCUMENTATION FOR THIS CLASS!!!!!!!!!!!
*/
class SND_In_File : virtual public Audio_File, virtual public SND_Format
{
public:
//! Default constructor
SND_In_File();
//! Open the file {\em fname}.
SND_In_File(const char *fname);
//! Destructor
virtual ~SND_In_File() { close(); }
//! Open the file {\em fname}.
virtual bool open(const char *fname);
//! Close the file.
virtual void close();
//! Go to sample number {\em pos}.
bool seek_read(int pos);
//! Return the current sample position in the file.
int tell_read();
//! Read the whole file into the vector {\em v}.
virtual bool read(vec &v);
//! Read {\em n} samples into the vector {\em v}.
virtual bool read(vec &v, int n);
};
/*!
\brief A class to write SND-files (the .au format)
\ingroup audio
ACTION: ADD DETAILED DOCUMENTATION FOR THIS CLASS!!!!!!!!!!!
*/
class SND_Out_File : virtual public Audio_File, virtual public SND_Format
{
public:
//! Constructor
SND_Out_File();
//! Open the file {\em fname}.
SND_Out_File(const char *fname, int rate = 8000, data_encoding e = enc_linear16);
//! Destructor
virtual ~SND_Out_File() { close(); }
//! Open the file {\em fname}.
bool open(const char *fname, int rate = 8000, data_encoding e = enc_linear16);
// Old definition. Removed since Sun CC gave a warning
//virtual bool open(const char *fname, int rate=8000, data_encoding e=enc_linear16);
//! Close the file.
virtual void close();
//! Go to sample number {\em pos}.
bool seek_write(int pos);
//! Return the current sample position in the file.
int tell_write();
//! Write the vector {\em v}.
virtual bool write(const vec &v);
};
/*!
\brief This class is capable of doing both input and output.
\ingroup audio
ACTION: ADD DETAILED DOCUMENTATION FOR THIS CLASS!!!!!!!!!!!
*/
class SND_IO_File : public SND_In_File, public SND_Out_File
{
public:
//! Constructor
SND_IO_File() { }
//! Open the file {\em fname}.
SND_IO_File(const char *fname) { open(fname); }
//! Destructor
virtual ~SND_IO_File() { close(); }
//! Open the file {\em fname}.
virtual bool open(const char *fname);
//! Close the file.
virtual void close();
};
/*
\brief SAP audio file input class
\ingroup audio
ADD DETAILED DOCUMENTATION FOR THIS CLASS!!!!!!!!!!!
*/
/*
class SAP_In_File : virtual public Audio_File {
public:
// Constructor
SAP_In_File();
// Open the file {\em fname}.
SAP_In_File(const char *fname);
// Destructor
virtual ~SAP_In_File() { close(); }
// Open the file {\em fname}.
virtual bool open(const char *fname);
// Close the file.
virtual void close();
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
virtual bool seek_read(int pos);
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
virtual int tell_read();
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
bool read(vec &v);
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
bool read(vec &v, int n);
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
const char *get_header() { return header; }
protected:
char header[SAP_HEADER_SIZE];
};
*/
/*
\brief SAP audio file output class
\ingroup audio
ADD DETAILED DOCUMENTATION FOR THIS CLASS!!!!!!!!!!!
*/
/*
class SAP_Out_File : virtual public Audio_File {
public:
// Constructor
SAP_Out_File();
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
SAP_Out_File(const char *fname, const char *hdr);
// Destructor
virtual ~SAP_Out_File() { close(); }
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
bool open(const char *fname, const char *hdr);
// Old def. Removed since Sun CC gave warning.
//virtual bool open(const char *fname, const char *hdr);
// Close the file
virtual void close();
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
bool seek_write(int pos);
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
int tell_write();
// ADD DOCUMENTATION FOR THIS MEMBER!!!!!!!!!!!
virtual bool write(const vec &v);
};
*/
/*
\brief SAP audio file input and output class
\ingroup audio
ADD DETAILED DOCUMENTATION FOR THIS CLASS!!!!!!!!!!!
*/
/*
class SAP_IO_File : public SAP_In_File, public SAP_Out_File {
public:
// Constructor
SAP_IO_File() { }
// Open the file {\em fname}.
SAP_IO_File(const char *fname) { open(fname); }
// Destructor
virtual ~SAP_IO_File() { close(); }
// Open the file {\em fname}.
virtual bool open(const char *fname);
// Close the file
virtual void close();
};
*/
/*! \addtogroup audio */
//!@{
//! Read raw 16-bin little endian audio data
bool raw16le_read(const char *fname, vec &v);
//! Read raw 16-bin little endian audio data
bool raw16le_read(const char *fname, vec &v, int beg, int len);
//! Write raw 16-bin little endian audio data
bool raw16le_write(const char *fname, const vec &v, bool append = false);
//! Read raw 16-bin big endian audio data
bool raw16be_read(const char *fname, vec &v);
//! Read raw 16-bin big endian audio data
bool raw16be_read(const char *fname, vec &v, int beg, int len);
//! Write raw 16-bin big endian audio data
bool raw16be_write(const char *fname, const vec &v, bool append = false);
//! Read SND audio data
bool snd_read(const char *fname, vec &v);
//! Read SND audio data
bool snd_read(const char *fname, vec &v, int beg, int len);
//! Write SND audio data
bool snd_write(const char *fname, const vec &v, int rate = 8000,
SND_Format::data_encoding e = SND_Format::enc_linear16);
/*
// Read SAP audio data
bool sap_read(const char *fname, vec &v);
// Read SAP audio data
bool sap_read(const char *fname, vec &v, int beg, int len);
// Write SAP audio data
bool sap_write(const char *fname, const vec &v, const char *hdr);
*/
//! Read binary data and optionally switch endianness
template<typename T>
inline T read_endian(std::istream &s, bool switch_endian = false)
{
T data;
int bytes = sizeof(T);
char *c = reinterpret_cast<char *>(&data);
if (!switch_endian) {
s.read(c, bytes);
}
else {
for (int i = bytes - 1; i >= 0; i--)
s.get(c[i]);
}
return data;
}
//! Write binary data and optionally switch endianness
template<typename T>
inline void write_endian(std::ostream &s, T data, bool switch_endian = false)
{
int bytes = sizeof(T);
char *c = reinterpret_cast<char *>(&data);
if (!switch_endian) {
s.write(c, bytes);
}
else {
for (int i = bytes - 1; i >= 0; i--)
s.put(c[i]);
}
}
//!@}
} // namespace itpp
#endif // #ifndef AUDIOFILE_H
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