id3.h

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#ifndef XID3_H
#define XID3_H

#include <stdio.h>
#include <stdint.h>

typedef struct
{
        uint8_t version_major;
        uint8_t version_rev;
        uint8_t flags;
        uint32_t size;
        unsigned char *frames;
} ID3_tag;

int ID3_tag_init(ID3_tag *t);

int ID3_tag_fwrite(ID3_tag *t, FILE *fp);

int ID3_tag_write(ID3_tag *tag, char *filename);

int ID3_tag_add_data(ID3_tag *tag, uint8_t t1, uint8_t t2, uint8_t t3, uint8_t t4, char *data);

/*                                                         'T','P','E','1' */
#define ID3_tag_add_artist(t, a) ID3_tag_add_data(t, 84, 80, 69, 49, a); 

/*                                                        'T','I','T','2' */
#define ID3_tag_add_title(t, s) ID3_tag_add_data(t, 84, 73, 84, 50, s); 

/*                                                        'T','A','L','B' */
#define ID3_tag_add_album(t, a) ID3_tag_add_data(t, 84, 65, 76, 66, a); 

/*                                                       'T','Y','E','R' */
#define ID3_tag_add_year(t, y) ID3_tag_add_data(t, 84, 89, 69, 82, y); 

/*                                                         'T','L','E','N' */
#define ID3_tag_add_length(t, l) ID3_tag_add_data(t, 84, 76, 69, 78, l); 

#endif /* XID3_H */