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// Copyright (C) 2002 Johnny Mariethoz (Johnny.Mariethoz@idiap.ch)
// and Samy Bengio (bengio@idiap.ch)
//
//
// This file is part of Torch. Release II.
// [The Ultimate Machine Learning Library]
//
// Torch 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.
//
// Torch 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 Torch; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef IOHTK_INC
#define IOHTK_INC
#include "Object.h"
namespace Torch {
/// HTK File Header
struct HTKhdr {
long nSamples;
long sampPeriod;
short sampSize;
short sampKind;
};
#define BASEMASK 077 /* Mask to remove qualifiers */
#define HASENERGY 0100 /* _E log energy included */
#define HASNULLE 0200 /* _N absolute energy suppressed */
#define HASDELTA 0400 /* _D delta coef appended */
#define HASACCS 01000 /* _A acceleration coefs appended */
#define HASCOMPX 02000 /* _C is compressed */
#define HASZEROM 04000 /* _Z zero meaned */
#define HASCRCC 010000 /* _K has CRC check */
#define HASZEROC 020000 /* _0 0'th Cepstra included */
#define HASVQ 040000 /* _V has VQ index attached */
enum _BaseParmKind{
WAVEFORM, /* Raw speech waveform (handled by HWave) */
LPC,LPREFC,LPCEPSTRA,LPDELCEP, /* LP-based Coefficients */
IREFC, /* Ref Coef in 16 bit form */
MFCC, /* Mel-Freq Cepstra */
FBANK, /* Log Filter Bank */
MELSPEC, /* Mel-Freq Spectrum (Linear) */
USER, /* Arbitrary user specified data */
DISCRETE, /* Discrete VQ symbols (shorts) */
ANON
};
typedef short ParmKind; /* BaseParmKind + Qualifiers */
/** This class is used to read HTK objects (used for various datasets)
*
* @author Samy Bengio (bengio@idiap.ch)
* @author Johnny Mariethoz (Johnny.Mariethoz@idiap.ch)
*/
class IOHtk : public Object
{
public:
/// the data itself
real* data;
/// number of columns in the data
int n_cols;
/// number of lines in the data
int n_lines;
/// kind of data
char* kind;
/// file name
char* file_name;
/// sampling period
long samp_period;
/** for each IOHtk object, specify the corresponding filename as well
as the maximum number of examples to load
*/
IOHtk(char* file,int max_load=-1);
/** write data on HTK binary format on the specifing directory
*/
void write(char* dir_to_save=NULL);
/** create a mask to remove energy and corresponding delta, delta-delta
*/
virtual void createMaskFromParam(bool* mask);
virtual ~IOHtk();
/// HTK source code
char* parmKind2Str(ParmKind kind, char *buf);
ParmKind str2ParmKind(char *str);
ParmKind baseParmKind(ParmKind kind);
bool hasEnergy(ParmKind kind);
bool hasDelta(ParmKind kind) ;
bool hasAccs(ParmKind kind) ;
bool hasNulle(ParmKind kind) ;
bool hasCompx(ParmKind kind) ;
bool hasCrcc(ParmKind kind) ;
bool hasZerom(ParmKind kind) ;
bool hasZeroc(ParmKind kind) ;
bool hasVQ(ParmKind kind) ;
};
}
#endif
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