bash script to convert sound file to C/C++ header

AKWF_0001.h

/* Adventure Kid Waveforms (AKWF) converted for use with Teensy Audio Library 
*  
*  Adventure Kid Waveforms(AKWF) Open waveforms library
*  https://www.adventurekid.se/akrt/waveforms/adventure-kid-waveforms/
*  
*  This code is in the public domain, CC0 1.0 Universal (CC0 1.0)
*  https://creativecommons.org/publicdomain/zero/1.0/
*
*  Converted by Brad Roy, https://github.com/prosper00
*/

/* AKWF_0001 256 samples
                                                                                                                        
  +-----------------------------------------------------------------------------------------------------------------+   
  |   * *                                                      **                                                   |   
  |  *   *                                                    *  *                                                  |   
  |  *    *                                                  *   **                                                 |   
  | *     *                                                  *    **                                                |   
  | *     *                                                  *     *                  ******                        |   
  |*       *             ********                           *       *               ***    ***                      |   
  |*       *            **      ***                        *        *             **          **                    |   
  |         *          *           **                     *          *            *            **                   |   
  |         *         **             **                ***           *           *              **                  |   
  |         *        **               **            ***               *         *                 **                |   
  |          *       *                  **        ***                 *        *                   **              *|   
  |          *      *                    ***    **                    *       *                      **     ********|   
  |           *    *                        *****                     **      *                        *****        |   
  |           **  **                                                   *     *                                      |   
  |            ****                                                     *  **                                       |   
  +-----------------------------------------------------------------------------------------------------------------+   
                                                                                                                        
                                                                                                                        
*/


const uint16_t AKWF_0001 [] = {
33220, 36394, 40224, 44326, 48176, 50957, 55005, 58677, 61653, 63849, 64912, 65126, 64472, 63271, 61542, 59528,
57195, 54626, 51530, 47996, 43849, 39375, 34555, 29939, 25547, 22231, 19610, 16502, 14137, 12199, 10874, 10149,
 9952, 10280, 11045, 12217, 13684, 15426, 17357, 19465, 21667, 23946, 26227, 28489, 30674, 32757, 34698, 36474,
38058, 39432, 40580, 41462, 42046, 42681, 43187, 43572, 43869, 44038, 44126, 44108, 44024, 43856, 43643, 43369,
43061, 42704, 42316, 41881, 41411, 40890, 40323, 39700, 39020, 38282, 37482, 36623, 35710, 34747, 33743, 32709,
31656, 30591, 29527, 28478, 27451, 26454, 25497, 24583, 23720, 22910, 22159, 21467, 20850, 20303, 19843, 19474,
19210, 19058, 19028, 19126, 19355, 19713, 20193, 20794, 21491, 22279, 23127, 24027, 24931, 25841, 26700, 27523,
28252, 28941, 29535, 30202, 30779, 31125, 31430, 31655, 31903, 32213, 32662, 33296, 34190, 35364, 36881, 38868,
41464, 43347, 45369, 48365, 51346, 54426, 57066, 59141, 60430, 60954, 60729, 59925, 58700, 57194, 55520, 53678,
51687, 49419, 46851, 43819, 40393, 36482, 32371, 28077, 24081, 20372, 17766, 15604, 13032, 11157,  9577,  8558,
 8016,  7936,  8287,  9015, 10073, 11371, 12896, 14569, 16394, 18295, 20281, 22283, 24312, 26311, 28294, 30209,
32069, 33835, 35516, 37080, 38539, 39870, 41079, 42161, 43120, 43958, 44681, 45297, 45811, 46234, 46567, 46822,
46993, 47090, 47103, 47038, 46882, 46638, 46293, 45852, 45306, 44660, 43914, 43080, 42160, 41172, 40123, 39025,
37891, 36729, 35551, 34362, 33174, 31988, 30819, 29662, 28532, 27423, 26351, 25307, 24311, 23355, 22463, 21629,
20883, 20225, 19678, 19245, 18946, 18780, 18750, 18859, 19086, 19429, 19848, 20347, 20850, 21382, 21825, 22235,
22319, 22040, 21953, 21795, 21455, 21125, 20796, 20672, 20689, 21046, 21609, 22574, 23750, 25377, 27224, 29822,
};

convert-all.sh

find . -name *.wav -exec ./convert.sh {} \;

convert.sh

#!/bin/bash
Help()
{
   # Display Help
   echo "
Convert a sound file to a C/C++ header file.
Should support any filetype supported by sox
produces unsigned 16-bit integer arrays
requires sox, hexdump
usage: 
$0 <filename>
"
   exit
}

if [[ $1 == "" ]]
then
   Help
fi

while getopts ":h" option; do
   case $option in
      h) # display Help
         Help
         exit;;
      \?) # invalid case
	 echo "Invalid option; -h for help"
	 exit;;
   esac
done

file="$(basename ${1%.*})" # will place output files in current dir
#file="${1%.*}" # will place output files in their original dir

echo '/* Adventure Kid Waveforms (AKWF) converted for use with Teensy Audio Library 
*  
*  Adventure Kid Waveforms(AKWF) Open waveforms library
*  https://www.adventurekid.se/akrt/waveforms/adventure-kid-waveforms/
*  
*  This code is in the public domain, CC0 1.0 Universal (CC0 1.0)
*  https://creativecommons.org/publicdomain/zero/1.0/
*
*  Converted by Brad Roy, https://github.com/prosper00
*/
' > "$file.h"

echo -e "/* $file 256 samples" >> "$file.h"

sox $1 -r 18816 $file.dat
tail -n+3 $file.dat > temp.dat
gnuplot -p -e "set term png size 1920,960; set output \"$file.png\"; plot \"temp.dat\" with lines;"
gnuplot -p -e "set terminal dumb 120 20 ; unset xtics; unset ytics; plot \"temp.dat\" notitle with lines;" >> "$file.h"
echo -e "*/\n\n" >> "$file.h"
rm "$file.dat"
rm "temp.dat"
sed -i 's/\o14//' "$file.h" # remove the ^L character that gnuplot is inserting


#ffmpeg -i in.flac -ac 1 -filter:a aresample=8000 -map 0:a -c:a pcm_s16le -f data - | \
#  gnuplot -p -e "set terminal png size 640,360; set output 'out.png'; plot '<cat' binary filetype=bin format='%int16' endian=little array=1:0 with lines;"

echo "const uint16_t "$file" [] = {" >> "$file.h"

#for 8-bit unsigned, add -b 8 to the sox command
sox $1 -e unsigned -r 18816 $file.raw
# 18816 = 256/600*44100 - decreases sample count from 600 to 256
# sox -G attempts to avoid clipping. Try with/without this

#for decimal
hexdump -v -e '16/2 "%5u, " "\n" ' "$file.raw" >> "$file.h"

#for hex
#hexdump -v -e '16/2 "0x%04x, " "\n" ' $file.raw >> $file.h

# for 8-bit, use '16/1,,,'

echo '};' >> "$file.h"

rm "$file.raw"