1 files changed, 155 insertions, 0 deletions

diff --git a/src/plugins/id3v2_extractor.c b/src/plugins/id3v2_extractor.c
new file mode 100644
index 0000000..fa5fea6
--- /dev/null
+++ b/src/plugins/id3v2_extractor.c
@@ -0,0 +1,155 @@
+/*
+     This file is part of libextractor.
+     (C) 2002, 2003, 2004, 2006, 2009 Vidyut Samanta and Christian Grothoff
+
+     libextractor 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, or (at your
+     option) any later version.
+
+     libextractor 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 libextractor; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+
+ */
+
+#include "platform.h"
+#include "extractor.h"
+#ifndef MINGW
+#include <sys/mman.h>
+#endif
+#include "convert.h"
+
+#define DEBUG_EXTRACT_ID3v2 0
+
+typedef struct
+{
+  const char *text;
+  enum EXTRACTOR_MetaType type;
+} Matches;
+
+static Matches tmap[] = {
+  {"TAL", EXTRACTOR_METATYPE_TITLE},
+  {"TT1", EXTRACTOR_METATYPE_GROUP},
+  {"TT2", EXTRACTOR_METATYPE_TITLE},
+  {"TT3", EXTRACTOR_METATYPE_TITLE},
+  {"TXT", EXTRACTOR_METATYPE_DESCRIPTION},
+  {"TPB", EXTRACTOR_METATYPE_PUBLISHER},
+  {"WAF", EXTRACTOR_METATYPE_LOCATION},
+  {"WAR", EXTRACTOR_METATYPE_LOCATION},
+  {"WAS", EXTRACTOR_METATYPE_LOCATION},
+  {"WCP", EXTRACTOR_METATYPE_COPYRIGHT},
+  {"WAF", EXTRACTOR_METATYPE_LOCATION},
+  {"WCM", EXTRACTOR_METATYPE_DISCLAIMER},
+  {"TSS", EXTRACTOR_METATYPE_FORMAT},
+  {"TYE", EXTRACTOR_METATYPE_DATE},
+  {"TLA", EXTRACTOR_METATYPE_LANGUAGE},
+  {"TP1", EXTRACTOR_METATYPE_ARTIST},
+  {"TP2", EXTRACTOR_METATYPE_ARTIST},
+  {"TP3", EXTRACTOR_METATYPE_CONDUCTOR},
+  {"TP4", EXTRACTOR_METATYPE_INTERPRET},
+  {"IPL", EXTRACTOR_METATYPE_CONTRIBUTOR},
+  {"TOF", EXTRACTOR_METATYPE_FILENAME},
+  {"TEN", EXTRACTOR_METATYPE_PRODUCER},
+  {"TCO", EXTRACTOR_METATYPE_SUBJECT},
+  {"TCR", EXTRACTOR_METATYPE_COPYRIGHT},
+  {"SLT", EXTRACTOR_METATYPE_LYRICS},
+  {"TOA", EXTRACTOR_METATYPE_ARTIST},
+  {"TRC", EXTRACTOR_METATYPE_ISRC},
+  {"TRK", EXTRACTOR_METATYPE_TRACK_NUMBER},
+  {"TCM", EXTRACTOR_METATYPE_CREATOR},
+  {"TOT", EXTRACTOR_METATYPE_ALBUM},
+  {"TOL", EXTRACTOR_METATYPE_AUTHOR},
+  {"COM", EXTRACTOR_METATYPE_COMMENT},
+  {"", EXTRACTOR_METATYPE_KEYWORDS},
+  {NULL, 0},
+};
+
+
+/* mimetype = audio/mpeg */
+int 
+EXTRACTOR_id3v2_extract (const unsigned char *data,
+                         size_t size,
+                         EXTRACTOR_MetaDataProcessor proc,
+                         void *proc_cls,
+                         const char *options)
+{
+  int unsync;
+  unsigned int tsize;
+  unsigned int pos;
+
+  if ((size < 16) ||
+      (data[0] != 0x49) ||
+      (data[1] != 0x44) ||
+      (data[2] != 0x33) || (data[3] != 0x02) || (data[4] != 0x00))
+    return 0;
+  unsync = (data[5] & 0x80) > 0;
+  tsize = (((data[6] & 0x7F) << 21) |
+           ((data[7] & 0x7F) << 14) |
+           ((data[8] & 0x7F) << 07) | ((data[9] & 0x7F) << 00));
+
+  if (tsize + 10 > size)
+    return 0;
+  pos = 10;
+  while (pos < tsize)
+    {
+      size_t csize;
+      int i;
+
+      if (pos + 6 > tsize)
+        return 0;
+      csize = (data[pos + 3] << 16) + (data[pos + 4] << 8) + data[pos + 5];
+      if ((pos + 6 + csize > tsize) || (csize > tsize) || (csize == 0))
+        break;
+      i = 0;
+      while (tmap[i].text != NULL)
+        {
+          if (0 == strncmp (tmap[i].text, (const char *) &data[pos], 3))
+            {
+              char *word;
+              /* this byte describes the encoding
+                 try to convert strings to UTF-8
+                 if it fails, then forget it */
+              switch (data[pos + 6])
+                {
+                case 0x00:
+                  word = EXTRACTOR_common_convert_to_utf8 ((const char *) &data[pos + 7],
+                                        csize, "ISO-8859-1");
+                  break;
+                case 0x01:
+                  word = EXTRACTOR_common_convert_to_utf8 ((const char *) &data[pos + 7],
+                                        csize, "UCS-2");
+                  break;
+                default:
+                  /* bad encoding byte,
+                     try to convert from iso-8859-1 */
+                  word = EXTRACTOR_common_convert_to_utf8 ((const char *) &data[pos + 7],
+                                        csize, "ISO-8859-1");
+                  break;
+                }
+              pos++;
+              csize--;
+              if ((word != NULL) && (strlen (word) > 0))
+                {
+                  prev = addKeyword (prev, word, tmap[i].type);
+                }
+              else
+                {
+                  free (word);
+                }
+              break;
+            }
+          i++;
+        }
+      pos += 6 + csize;
+    }
+  return 0;
+}
+
+/* end of id3v2_extractor.c */