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/* */
/* Centre for Speech Technology Research */
/* University of Edinburgh, UK */
/* Copyright (c) 1996 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* THE UNIVERSITY OF EDINBURGH AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL THE UNIVERSITY OF EDINBURGH NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author : Paul Taylor and Alan Black */
/* Date : May 1996 */
/*-----------------------------------------------------------------------*/
/* EST_Wave class auxiliary functions */
/* */
/*=======================================================================*/
/**@name EST_wave_aux
Auxiliary functions for processing waveforms.
*/
//@{
#ifndef __EST_WAVE_AUX_H__
#define __EST_WAVE_AUX_H__
#include "EST_String.h"
#include "EST_Wave.h"
#include "ling_class/EST_Relation.h"
#include "EST_Option.h"
#include "EST_FMatrix.h"
#include "EST_TNamedEnum.h"
int wave_extract_channel(EST_Wave &single, const EST_Wave &multi, int channel);
void wave_combine_channels(EST_Wave &combined, const EST_Wave &multi);
int wave_subwave(EST_Wave &subsig,EST_Wave &sig,int offset,int length);
int wave_divide(EST_WaveList &wl, EST_Wave &sig, EST_Relation &keylab,
const EST_String &ext);
int wave_extract(EST_Wave &part, EST_Wave &sig, EST_Relation &keylab,
const EST_String &file);
void add_waves(EST_Wave &s, const EST_Wave &m);
EST_Wave difference(EST_Wave &a, EST_Wave &b);
float rms_error(EST_Wave &a, EST_Wave &b, int channel);
float abs_error(EST_Wave &a, EST_Wave &b, int channel);
float correlation(EST_Wave &a, EST_Wave &b, int channel);
EST_FVector rms_error(EST_Wave &a, EST_Wave &b);
EST_FVector abs_error(EST_Wave &a, EST_Wave &b);
EST_FVector correlation(EST_Wave &a, EST_Wave &b);
EST_Wave error(EST_Wave &ref, EST_Wave &test, int relax);
void absolute(EST_Wave &a);
EST_read_status read_wave(EST_Wave &sig, const EST_String &in_file,
EST_Option &al);
EST_write_status write_wave(EST_Wave &sig, const EST_String &in_file, EST_Option &al);
void wave_info(EST_Wave &w);
void invert(EST_Wave &sig);
void differentiate(EST_Wave &sig);
void reverse(EST_Wave &sig);
void ulaw_to_short(const unsigned char *ulaw,short *data,int length);
void alaw_to_short(const unsigned char *alaw,short *data,int length);
void uchar_to_short(const unsigned char *chars,short *data,int length);
void short_to_char(const short *data,unsigned char *chars,int length);
void short_to_ulaw(const short *data,unsigned char *ulaw,int length);
void short_to_alaw(const short *data,unsigned char *alaw,int length);
// Used when setting Waves in Features
VAL_REGISTER_CLASS_DCLS(wave,EST_Wave)
enum EST_sample_type_t {
st_unknown,
st_schar,
st_uchar,
st_short,
st_shorten,
st_int,
st_float,
st_double,
st_mulaw,
st_adpcm,
st_alaw,
st_ascii};
enum EST_write_status wave_io_save_header(FILE *fp,
const int num_samples, const int num_channels,
const int sample_rate,
const EST_String& stype, const int bo,
const EST_String& ftype);
extern EST_TNamedEnum<EST_sample_type_t> EST_sample_type_map;
#endif /* __EST_WAVE_AUX_H__ */
//@}
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