#ifndef _TextGrid_extensions_h_
#define _TextGrid_extensions_h_
/* TextGrid_extensions.h
 *
 * Copyright (C) 1993-2006 David Weenink
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 djmw 20020516 GPL header
 djmw 20060921 Latest modification
*/

#ifndef _TextGrid_h_
	#include "TextGrid.h"
#endif

TextGrid TextGrid_readFromTIMITLabelFile (MelderFile file, int phnFile);
/*
	Read TIMIT label file with the following structure:
		samplenumber1 samplenumber2 label1
		samplenumber3 samplenumber4 label2
		...
		samplenumber2n-1 samplenumber2n labeln
		
	The first tier of TextGrid will contain the TIMIT labels.
	If phnFile != 0, the second tier will contain the translation of the
	TIMIT labels into IPA labels.
	For the translation from sample number to time a default sampling
	frequency of 16000 Hz is assumed.
*/

Any TextGrid_TIMITLabelFileRecognizer (int nread, const char *header, MelderFile file);
/*
	There are two types of TIMIT label files. One with phonetic labels, these
	files have '.phn' as file extension. The other contains word labels and has
	'.wrd' as extension. Since these extensions are only valid on the CDROM we can
	not use them for filetype recognition. Both TIMIT label files do not have a 
	self-describing format. For filetype recognition we make use of the fact that
	both files are text files and always have three items on each line: two numbers
	followed by a string. The numbers increase in a monotone way.
	The recognizer only checks the first two lines and it tests whether
		0 <= number[1] < number[2] <= number[3] < number[4]
	(A number of .wrd files do not obey the monotonocity constraint for
	 number[4] and number[5] !)
	The decision whether it is a .phn or .wrd file is:
		.phn if string[1] == 'h#' AND string[2] is a TIMIT phonetic label
		.wrd if (string[1] == 'h#' AND string[2] is a valid word) OR
			string[1] and string[2] are both valid words.
		A valid word is a string with contains the lowercase characters [a-z] and ['].
*/

TextGrid TextGrids_merge (TextGrid grid1, TextGrid grid2);
/*
	Merge two textGrids.
	The new domain will be: 
	[min(grid1->xmin, grid2->xmin), max(grid1->xmax, grid2->xmax)].
	This implies that for the resulting TextGrid each interval tier will have 
	one or two extra intervals if the domains of the two TextGrids are not equal,
*/

int TextGrid_extendTime (TextGrid me, double delta_time, int position);
/*
	Extend the begin-time (delta_time<0) or end-time (delta_time>0).
	For Point-tiers only the domain will be extended.
	Interval tiers will have a new (empty) interval at the start or the end.
*/

int TextGrid_setTierName (TextGrid me, long itier, char *newName);

int TextTier_changeLabels (I, long from, long to, char *search, char *replace, int use_regexp, long *nmatches, long *nstringmatches);

int IntervalTier_changeLabels (I, long from, long to, char *search, char *replace, int use_regexp, long *nmatches, long *nstringmatches);

void IntervalTier_removeBoundary_equalLabels (IntervalTier me, char *label);
void IntervalTier_removeBoundary_minimumDuration (IntervalTier me, char *label, double minimumDuration);

int TextGrid_changeLabels (TextGrid me, int tier, long from, long to, char *search, char *replace, int use_regexp, long *nmatches, long *nstringmatches);


#endif /* _TextGrid_extensions_h_ */