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/*GPL*START*
*
* id3tag.h - id3 tag detection and analysis header file
*
* Copyright (C) 2000 by Jean Delvare <delvare@ensicaen.ismra.fr>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* *GPL*END*/
/*COMMENTS
*
* Reference docs are :
* [1] Id3 made easy, http://www.id3.org/id3v1.html
* [2] Xmms sources (xmms-1.2.3/Input/mpg123/mpg123.c)
*
* The specification [1] is somehow incomplete, so I'd like to add:
* 1- Most software don't fill the fields with binary zeroes but with spaces
* (Ox20). This doesn't really go against the specification.
* 2- The specification doesn't say what characters may be used in an id3 tag.
* I've considered that the use of non-printable chars (0x01 to 0x1f) is
* prohibited.
* 3- As far as the year is concerned, the specification doesn't say wether
* only digits must be used of not. I suggest that the only two accepted
* possibilities are: not set (and thus filled with binary zeroes) or
* set to a four-digit year. But we also will accept four spaces as a
* correct value, since most software fill blanks with spaces. When only
* guessing, we treat that field exactly like any other, however.
* 4- As seen in [2], there are more than 80 genres as seen in [1]. Also,
* the value 0xff seems to be used when genre is not set. Thus, we will
* accept all these values (0x00 to 0x93, plus 0xff).
*
* *COMMENTS*END*/
#ifndef _id3tag_h_
#define _id3tag_h_
class Tagv1
{
public:
// Default constructor.
Tagv1();
// Constructor from pointer. Note that it is really only a pointer, the
// data is not duplicated. This is probably not the safest way, but the
// fastest.
Tagv1(const unsigned char *p);
// Destructor, doing nothing.
~Tagv1();
// Methods.
short unsigned int version() const;
bool isValid() const;
bool isValidSpecs() const;
bool isValidGuess() const;
void setTarget(const unsigned char *p);
bool store();
bool restore(unsigned char *p);
void fillFields();
// Static functions.
static bool valid_tag_field_strict(const unsigned char *p, const int len);
static bool valid_tag_field_loose(const unsigned char *p, const int len);
static int find_next_tag(const unsigned char *p, int len);
static void copyStringField(char *dest, const unsigned char *src, int len);
unsigned short int fields_version;
bool fields_spacefilled;
char field_title[31];
char field_artist[31];
char field_album[31];
char field_year[5];
char field_comment[31];
unsigned char field_genre;
unsigned char field_track;
static const char * const id3_genres[];
static const int genres_count;
private:
static bool spacefilled_tag_field(const char *p, const unsigned int len);
unsigned char *target;
bool al; // wether memory is allocated or not
};
#endif
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