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// soundheader.h
/******************************************************************************
*
* MiXViews - an X window system based sound & data editor/processor
*
* Copyright (c) 1993, 1994 Regents of the University of California
*
* Author: Douglas Scott
* Date: December 13, 1994
*
* Permission to use, copy and modify this software and its documentation
* for research and/or educational purposes and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation. The author reserves the right to distribute this
* software and its documentation. The University of California and the author
* make no representations about the suitability of this software for any
* purpose, and in no event shall University of California be liable for any
* damage, loss of data, or profits resulting from its use.
* It is provided "as is" without express or implied warranty.
*
******************************************************************************/
// Specialized Header subclasses for reading, parsing, and verifying headers
// on various types of on-disk sound files.
#ifndef SOUNDHEADER_H
#ifdef __GNUG__
#pragma interface
#endif
#define SOUNDHEADER_H
#include "diskstruct.h"
#include "header.h"
#include "formatrequester.h"
#define _SND ((int)0x2e736e64)
#define DNS_ ((int)0x646e732e)
#define SF_MAGIC ((int)0x0001a364) /* used by old BSD/IRCAM style headers */
#define SF_SWAPMAGIC ((int)0x64a30100) /* same value, byte-swapped */
#define IRCAM_SUNMAGIC ((int)0x64a30200) /* special values for new IRCAM */
#define IRCAM_MIPSMAGIC ((int)0x64a30300)
#define IRCAM_NEXTMAGIC ((int)0x64a30400)
#define SIZEOF_BSD_HEADER 1024
#define MAXCOMM 512
class SoundHeader : public Header {
typedef Header Super;
public: // class methods
enum Type { None=0x1, Snd=0x2, Hybrid=0x4, Ircam=0x8,
Aifc=0x10, Wave=0x20, Mpeg1=0x40 };
enum Chans { MaxChannels = 4 };
static Type defaultHeaderType() { return default_HeaderType; }
static Type setDefaultHeaderType(Type type) {
Type oldType = default_HeaderType;
default_HeaderType = type;
return oldType;
}
// meta-constructors
static SoundHeader* create(DataFile*, DataType, int, int,
double, boolean reading);
static SoundHeader* create(Type, DataType, int, int, double);
public: // object methods
virtual int sampleRate() { return samprate; }
virtual double peakAmp() { return peakamp; }
virtual Type headerType() { return isRaw() ? None: header_type; }
protected:
redefined int secondsToBytes(double);
redefined int checkHeader();
virtual boolean isValid(DataType)=0;
virtual boolean validChannels(int chans) { return chans > 0; }
SoundHeader(DataType, int rate, int chans, double peak, int magic);
class SoundConfigRequester
: public Header::ConfigRequester, public FormatRequester {
public:
SoundConfigRequester(Header *);
protected:
redefined void configureRequest(Request *);
};
friend SoundConfigRequester::SoundConfigRequester(Header *);
friend void SoundConfigRequester::configureRequest(Request *);
redefined const char* magicError();
public:
redefined Requester* configRequester() {
return new SoundConfigRequester(this);
}
protected: // object members
Type header_type;
int samprate;
double peakamp;
private: // class members
static Type default_HeaderType;
};
// this is a generic header for either NeXT or Sparc files
class SndOrIrcamSoundHeader : public SoundHeader {
protected:
SndOrIrcamSoundHeader(DataType, int rate, int ch, double pk, int mgc);
redefined boolean isMagic();
redefined boolean magicIsSwapped();
redefined int readInfo(DataFile *);
redefined int readComment(DataFile *);
redefined int writeComment(DataFile *);
int readSndInfo(DataFile *);
int readIrcamInfo(DataFile *);
int extractPeak(const char *);
int extractComment(const char *);
int loadPeak(const char *);
int loadComment(const char *);
redefined boolean isValid(DataType t) {
return (t == MuLawData || t == ShortData || t == FloatData);
}
protected:
enum SF_Code { SF_END = 0, SF_MAXAMP, SF_COMMENT,
SF_PVDATA, SF_AUDIOENCOD, SF_CODMAX = SF_AUDIOENCOD
};
struct SFCode {
short code;
short bsize;
};
struct SFMaxamp {
float value[MaxChannels];
int samploc[MaxChannels];
int timetag;
};
struct SFComment {
char comment[MAXCOMM];
};
struct SFPvData { // this code written by pvanal
short frameSize;
short frameIncr;
};
struct SFAudioEncod { // ditto
short encoding;
short grouping;
};
class SndStruct : public DiskStruct {
typedef DiskStruct Super;
public:
SndStruct(int dl=0, int ds=0, int fmt=0, int sr=0, int ch=0) :
magic(_SND), data_loc(dl), data_size(ds), format(fmt),
samp_rate(sr), nchans(ch) {}
redefined MXINT32 readSize();
protected:
redefined ValueSetterBase** valueSetters();
enum { NumElements = 6 };
private:
friend class SndOrIrcamSoundHeader;
private:
int magic;
int data_loc;
int data_size;
int format;
int samp_rate;
int nchans;
};
class IrcamStruct : public VariableBlockDiskStruct {
typedef VariableBlockDiskStruct Super;
public:
IrcamStruct(float sr=0, int ch=0, int pm=0, int trim=0);
virtual ~IrcamStruct();
redefined MXINT32 readSize() { return SIZEOF_BSD_HEADER - lengthTrim; }
boolean isValid() { return sf_magic == SF_MAGIC; }
protected:
redefined ValueSetterBase** valueSetters();
redefined void createVariableBlock();
enum { NumElements = 4 };
private:
redefined char* variableBlockAddress() { return data; }
redefined MXINT32 variableBlockLength();
friend class SndOrIrcamSoundHeader;
friend class IrcamHeader;
friend class HybridHeader;
private:
int sf_magic;
float sf_srate;
int sf_chans;
int sf_packmode;
char* data; // first 2 bytes will contain first sf_code
int lengthTrim;
};
private:
const char *getSFCode(const char *, int);
int putSFCode(const char *, const char *, const SFCode *);
};
class IrcamHeader : public SndOrIrcamSoundHeader {
typedef SndOrIrcamSoundHeader Super;
public:
IrcamHeader(DataType, int rate, int chans=1, double peak=0);
IrcamHeader();
protected:
redefined int diskHeaderSize() { return SIZEOF_BSD_HEADER; }
redefined int diskHeaderCommentSize() { return diskHeaderSize() - 17; }
redefined boolean isMagic();
redefined boolean isValid(DataType t) {
return (t == ShortData || t == FloatData);
}
redefined boolean validChannels(int chans) {
return chans == 1 || chans == 2 || chans == 4;
}
redefined int writeInfo(DataFile *);
};
class SndHeader : public SndOrIrcamSoundHeader {
typedef SndOrIrcamSoundHeader Super;
public:
SndHeader(DataType, int rate, int chans=1);
SndHeader();
protected:
redefined int diskHeaderSize() { return 28; }
redefined int diskHeaderCommentSize() { return 4; }
redefined int diskHeaderInfoSize() { return 24; }
redefined boolean isValid(DataType);
redefined int writeInfo(DataFile *);
redefined int writeComment(DataFile *);
redefined int commentLength();
};
class HybridHeader : public SndHeader {
typedef SndHeader Super;
public:
HybridHeader(DataType, int rate, int chans=1, double peak=0);
HybridHeader();
protected:
redefined int diskHeaderSize() { return SIZEOF_BSD_HEADER; }
redefined int diskHeaderCommentSize() { return diskHeaderSize() - 28 - 17; }
redefined boolean isValid(DataType);
redefined int writeInfo(DataFile *);
redefined int writeComment(DataFile *);
};
#endif
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