Song fingerprinting tools, using FooID Options

[musicmusic]

I found an old copy of libFooID and decided to try and put it to some use. How is another question..

Anyway I came up with a little component that allows you to calculate FooIDs and save them to the file, as well as compare the FooID of two files. Some downloads below:

FooID binary (put this in your foobar2000 folder)
foobar2000 component version 0.3 (experimental)
foobar2000 component version 0.2 (experimental)


libFooID source

Update: Garf has restored the Foosic homepage now

I am not sure how this is useful.. Maybe finding matches within a set of files would be more useful (?) If someone actually downloads this have fun : P

This post has been edited by musicmusic: Mar 15 2009, 15:31

[foosion]

Check the definition of the t_fingerprint structure in common.h:

CODE

/*
fingerprint storage
*/
struct t_fingerprint
{
/*
fingerprint version
*/
short version;
/*
length in centiseconds
*/
int length;
/*
average line fit, times 1000
*/
short avg_fit;
/*
average dominant line, times 100
*/
short avg_dom;
/*
spectral fits, 4 bits times 16 bands = 32 times 87 frames
-> 348 bytes
*/
unsigned char r[348];
/*
spectral doms, 6 bits times 87 frames = 65.25
*/
unsigned char dom[66];
};

The content of this structure is packed into a byte array in fp_calculate function in fooid.c:

CODE

    memcpy(buff, &(fi->fp.version), sizeof(short));
    buff += sizeof(short);
    memcpy(buff, &(fi->fp.length), sizeof(int));
    buff += sizeof(int);
    memcpy(buff, &(fi->fp.avg_fit), sizeof(short));
    buff += sizeof(short);
    memcpy(buff, &(fi->fp.avg_dom), sizeof(short));
    buff += sizeof(short);
    memcpy(buff, &(fi->fp.r), sizeof(unsigned char) * 348);
    buff += sizeof(unsigned char) * 348;
    memcpy(buff, &(fi->fp.dom), sizeof(unsigned char) * 66);
    buff += sizeof(unsigned char) * 66;

As you can see different parts of the fingerprint contain different values. If you need more details about the algorithm, you could try to contact Garf. Since he developed FooID during his time at university, he might have written a paper about it.