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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef _MSC_VER
#include "win32/zlib.h"
#else
#include <zlib.h>
#endif
#define ID3_BLOCK_SIZE 4096
// ID3v1 field frames
#define ID3_FRAME_TITLE "TIT2"
#define ID3_FRAME_ARTIST "TPE1"
#define ID3_FRAME_ALBUM "TALB"
#define ID3_FRAME_TRACK "TRCK"
#define ID3_FRAME_YEAR "TDRC"
#define ID3_FRAME_GENRE "TCON"
#define ID3_FRAME_COMMENT "COMM"
// Tag flags
enum {
ID3_TAG_FLAG_UNSYNCHRONISATION = 0x80,
ID3_TAG_FLAG_EXTENDEDHEADER = 0x40,
ID3_TAG_FLAG_EXPERIMENTALINDICATOR = 0x20,
ID3_TAG_FLAG_FOOTERPRESENT = 0x10
};
// Frame flags
enum {
// v2.3 flags
ID3_FRAME_FLAG_V23_COMPRESSION = 0x0080,
ID3_FRAME_FLAG_V23_ENCRYPTION = 0x0040,
ID3_FRAME_FLAG_V23_GROUPINGIDENTITY = 0x0020,
// v2.4 flags
ID3_FRAME_FLAG_V24_GROUPINGIDENTITY = 0x0040,
ID3_FRAME_FLAG_V24_COMPRESSION = 0x0008,
ID3_FRAME_FLAG_V24_ENCRYPTION = 0x0004,
ID3_FRAME_FLAG_V24_UNSYNCHRONISATION = 0x0002,
ID3_FRAME_FLAG_V24_DATALENGTHINDICATOR = 0x0001
};
enum id3_field_type {
ID3_FIELD_TYPE_TEXTENCODING,
ID3_FIELD_TYPE_LATIN1,
ID3_FIELD_TYPE_LATIN1LIST,
ID3_FIELD_TYPE_STRING,
ID3_FIELD_TYPE_STRINGFULL,
ID3_FIELD_TYPE_STRINGLIST,
ID3_FIELD_TYPE_LANGUAGE,
ID3_FIELD_TYPE_FRAMEID,
ID3_FIELD_TYPE_DATE,
ID3_FIELD_TYPE_INT8,
ID3_FIELD_TYPE_INT16,
ID3_FIELD_TYPE_INT24,
ID3_FIELD_TYPE_INT32,
ID3_FIELD_TYPE_INT32PLUS,
ID3_FIELD_TYPE_BINARYDATA
};
enum id3_field_textencoding {
ISO_8859_1 = 0x00,
UTF_16 = 0x01,
UTF_16BE = 0x02,
UTF_8 = 0x03
};
typedef struct id3info {
PerlIO *infile;
char *file;
Buffer *buf;
HV *info;
HV *tags;
// scratch buffer used for UTF-8 decoding each frame
Buffer *utf8;
uint8_t version_major;
uint8_t version_minor;
uint8_t flags;
uint8_t tag_data_safe;
uint32_t size;
uint32_t size_remain;
uint32_t offset; // For non-MP3, offset into file where tag begins
} id3info;
typedef struct id3_compat {
char const *id;
char const *equiv;
} id3_compat;
typedef struct id3_frametype {
char const *id;
unsigned int nfields;
enum id3_field_type const *fields;
char const *description;
} id3_frametype;
extern struct id3_frametype const id3_frametype_text;
extern struct id3_frametype const id3_frametype_url;
extern struct id3_frametype const id3_frametype_experimental;
extern struct id3_frametype const id3_frametype_unknown;
extern struct id3_frametype const id3_frametype_obsolete;
int parse_id3(PerlIO *infile, char *file, HV *info, HV *tags, uint32_t seek, off_t file_size);
int _id3_parse_v1(id3info *id3);
int _id3_parse_v2(id3info *id3);
int _id3_parse_v2_frame(id3info *id3);
int _id3_parse_v2_frame_data(id3info *id3, char const *id, uint32_t size, id3_frametype const *frametype);
void _id3_set_array_tag(id3info *id3, char const *id, AV *framedata);
uint32_t _id3_get_v1_utf8_string(id3info *id3, SV **string, uint32_t len);
uint32_t _id3_get_utf8_string(id3info *id3, SV **string, uint32_t len, uint8_t encoding);
uint32_t _id3_parse_rvad(id3info *id3, char const *id, uint32_t size);
uint32_t _id3_parse_rgad(id3info *id3);
uint32_t _id3_parse_rva2(id3info *id3, uint32_t len, AV *framedata);
uint32_t _id3_parse_sylt(id3info *id3, uint8_t encoding, uint32_t len, AV *framedata);
uint32_t _id3_parse_etco(id3info *id3, uint32_t len, AV *framedata);
void _id3_convert_tdrc(id3info *id3);
uint32_t _id3_deunsync(unsigned char *data, uint32_t length);
void _id3_skip(id3info *id3, uint32_t size);
char const * _id3_genre_index(unsigned int index);
char const * _id3_genre_name(char const *string);
id3_compat const * _id3_compat_lookup(register char const *, register unsigned int);
id3_frametype const * _id3_frametype_lookup(register char const *, register unsigned int);
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