Audio2ASCII

audio2ascci.c

// This a quick and dirty variation around the code provided here by @rsta2 : https://github.com/rsta2/circle/discussions/567#discussioncomment-13051923
// Build it with : gcc -o audio2ascii audio2ascii.c
// Run it without arguments to see usage.
// See here for more details : https://github.com/rsta2/circle/tree/master/sample/12-pwmsound


#include <stdio.h> 
#include <string.h> 

int main (int argc, char* argv[])
{
	FILE *fin = NULL;
	if (argc >= 3) {
		fin = fopen (argv[1], "rb");
	}
	if (fin == NULL)
	{	
		printf("Usage:\n"
			"  audio2ascii $input_file.raw $nchannel $nbits.\n\n"
			"$nchannel can be 1 for mono, 2 for stereo.\n"
			"$nbits can be 8 or 16.\n"
		);
		return 1;
	}
	printf("//\n"
		"// sound.h \n"
		"//\n"
		"#ifndef _sound_h \n"
		"#define _sound_h \n"
									 "\n"
		"#define SOUND_CHANNELS		%s \n"
		"#define SOUND_BITS		%s  \n"
									 "\n"
		"signed short Sound[] =		  \n"
		"{\n"
	,argv[2], argv[3]);
	char bit8 = strcmp(argv[2], "8")==0?1:0;
	unsigned offset = 0;
	short value;
	while (fread (&value, sizeof value, 1, fin) == 1)
	{
		if (bit8){
			// Split short in two
			printf ("%d,%d", (unsigned char) ((int) value), (unsigned char) ((int) value>>8));
		} else {
			
			printf ("%d", (int) value);
		}

		if (offset++ % (24>>bit8) == (23>>bit8))
		{
			printf (",\n");
		}
		else
		{
			printf (",");
		}
	}
	printf( "}; \n"
			"\n"
			"#endif"
	);
	fclose (fin);

	return 0;
}