apps/metadata/spc.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Dave Chapman
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #include <ctype.h>
  25 #include <inttypes.h>
  26
  27 #include "system.h"
  28 #include "metadata.h"
  29 #include "metadata_common.h"
  30 #include "metadata_parsers.h"
  31 #include "debug.h"
  32 #include "rbunicode.h"
  33
  34 bool get_spc_metadata(int fd, struct mp3entry* id3)
  35 {
  36     /* Use the trackname part of the id3 structure as a temporary buffer */
  37     unsigned char * buf = (unsigned char *)id3->path;
  38     char * p;
  39
  40     unsigned long length;
  41     unsigned long fade;
  42     bool isbinary = true;
  43     int i;
  44
  45     /* try to get the ID666 tag */
  46     if ((lseek(fd, 0x2e, SEEK_SET) < 0)
  47         || (read(fd, buf, 0xD2) < 0xD2))
  48     {
  49         DEBUGF("lseek or read failed\n");
  50         return false;
  51     }
  52
  53     p = id3->id3v2buf;
  54
  55     id3->title = p;
  56     buf[31] = 0;
  57     p = iso_decode(buf, p, 0, 32);
  58     buf += 32;
  59
  60     id3->album = p;
  61     buf[31] = 0;
  62     p = iso_decode(buf, p, 0, 32);
  63     buf += 48;
  64
  65     id3->comment = p;
  66     buf[31] = 0;
  67     p = iso_decode(buf, p, 0, 32);
  68     buf += 32;
  69
  70     /* Date check */
  71     if(buf[2] == '/' && buf[5] == '/')
  72         isbinary = false;
  73
  74     /* Reserved bytes check */
  75     if(buf[0xD2 - 0x2E - 112] >= '0' &&
  76        buf[0xD2 - 0x2E - 112] <= '9' &&
  77        buf[0xD3 - 0x2E - 112] == 0x00)
  78         isbinary = false;
  79
  80     /* is length & fade only digits? */
  81     for (i=0;i<8 && (
  82         (buf[0xA9 - 0x2E - 112+i]>='0'&&buf[0xA9 - 0x2E - 112+i]<='9') ||
  83         buf[0xA9 - 0x2E - 112+i]=='\0');
  84         i++);
  85     if (i==8) isbinary = false;
  86
  87     if(isbinary) {
  88         id3->year = buf[0] | (buf[1]<<8);
  89         buf += 11;
  90
  91         length = (buf[0] | (buf[1]<<8) | (buf[2]<<16)) * 1000;
  92         buf += 3;
  93
  94         fade = (buf[0] | (buf[1]<<8) | (buf[2]<<16) | (buf[3]<<24));
  95         buf += 4;
  96     } else {
  97         char tbuf[6];
  98
  99         buf += 6;
 100         buf[4] = 0;
 101         id3->year = atoi(buf);
 102         buf += 5;
 103
 104         memcpy(tbuf, buf, 3);
 105         tbuf[3] = 0;
 106         length = atoi(tbuf) * 1000;
 107         buf += 3;
 108
 109         memcpy(tbuf, buf, 5);
 110         tbuf[5] = 0;
 111         fade = atoi(tbuf);
 112         buf += 5;
 113     }
 114
 115     id3->artist = p;
 116     buf[31] = 0;
 117     iso_decode(buf, p, 0, 32);
 118
 119     if (length==0) {
 120         length=3*60*1000; /* 3 minutes */
 121         fade=5*1000; /* 5 seconds */
 122     }
 123
 124     id3->length = length+fade;
 125
 126     id3->filesize = filesize(fd);
 127     id3->genre_string = id3_get_num_genre(36);
 128
 129     return true;
 130 }