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// cs_pvocheader.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.
*
******************************************************************************/
// This class uses the header format for phase vocoder data generated by
// the pvanal routines in Csound.
#ifndef CSPVOCHEADER_H
#ifdef __GNUG__
#pragma interface
#endif
#define CSPVOCHEADER_H
#include "header.h"
class CS_PvocHeader : public FrameDataHeader {
typedef FrameDataHeader Super;
public:
CS_PvocHeader(int chans, double frate, int srate);
virtual ~CS_PvocHeader() {}
protected:
redefined int diskHeaderSize() { return sizeof(DiskHeader); }
redefined int diskHeaderCommentSize() { return 4; }
redefined boolean isMagic() { return magic() == PV_MAGIC; }
redefined int checkHeader();
redefined int readInfo(DataFile *);
redefined int writeInfo(DataFile *);
redefined const char* magicError();
private:
friend Header* createPvocHeader(class PvocData *, DataFile *);
enum Magic { PV_MAGIC = 517730 };
enum FrameFormat {
PVMAG = 1, PVPHASE, PVPOLAR, PVREAL, PVIMAG, PVRECT, PVPVOC,
PVCQ = 32 // ORed with previous to indicate one frame per 8ve
};
enum FreqFormat { PVLIN = 1, PVEXP };
enum DataFormat {
PVSHORT = 2, // 16 bit linear data
PVINT32 = 4, // 32 bit linear data
PVFLOAT = (4+32), // 32 bit float data
PVDOUBLE = (8+32) // 64 bit float data
};
// The structure of the CS_PVOC header on disk
struct DiskHeader {
INT32 magic; // magic number to identify
INT32 headBsize; // byte offset from start to data
INT32 dataBsize; // number of bytes of data
INT32 dataFormat; // (int) format specifier
float samplingRate; // of original sample
INT32 channels; // (int) mono/stereo etc
INT32 frameSize; // size of FFT frames (2^n)
INT32 frameIncr; // # new samples each frame
INT32 frameBsize; // bytes in each file frame
INT32 frameFormat; // (int) how words are org'd in frms
float minFreq; // freq in Hz of lowest bin (exists)
float maxFreq; // freq in Hz of highest (or next)
INT32 freqFormat; // (int) flag for log/lin frq
char info[4]; // extendable byte area
};
};
#endif
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