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# Calculates the duration of all intervals of all the files in a specified folder.
# All you need is a set of TextGrid files. 
# Author: Shigeto Kawahara
# Ver. 10/3/2010 (supercedes the previous versions)


form Calculate durations of labeled segments
	sentence directory ./
endform


#Read all files in a folder
Create Strings as file list... gridlist 'directory$'/*.TextGrid
n = Get number of strings

for i to n
clearinfo

#Loop through files
	select Strings gridlist
	gridname$ = Get string... i
	Read from file... 'directory$'/'gridname$'
	soundname$ = selected$ ("TextGrid")

	
# We then calculate the durations

	int=Get number of intervals... 1

	for k from 1 to 'int'
		select TextGrid 'soundname$'

		label$ = Get label of interval... 1 'k'
		if label$ <> ""
			
 			onset = Get starting point... 1 'k'
  			offset = Get end point... 1 'k'
       
			Read from file... 'directory$'/'soundname$'.wav
			Extract part: onset, offset, "rectangular", 1, "no"			Save as WAV file: ... 'directory$'/'label$'.wav

		endif
	endfor

endfor

# clean up
select all
Remove