Add mp3guessenc lib

1 files changed, 112 insertions, 0 deletions

diff --git a/lib/mp3guessenc-0.27.4/tags.h b/lib/mp3guessenc-0.27.4/tags.h
new file mode 100644
index 0000000000..4bc609b707
--- /dev/null
+++ b/lib/mp3guessenc-0.27.4/tags.h
@@ -0,0 +1,112 @@
+/*
+ *   tags is a support module which provides access to metadata tags (and xing/vbri/lame tags as well)
+ *   Copyright (C) 2013-2018 Elio Blanca <eblanca76@users.sourceforge.net>
+ *
+ *   This library is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU Lesser General Public
+ *   License as published by the Free Software Foundation; either
+ *   version 2.1 of the License, or (at your option) any later version.
+ *
+ *   This library 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
+ *   Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public
+ *   License along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+/* Modifed by Evan Dekker 2019-09-26 */
+
+#ifndef TAGS_H
+#define TAGS_H
+
+#define LAMETAGSIZE        36
+#define LAME_STRING_LENGTH 48
+
+#define TAG_NOTAG           0
+#define TAG_VBRITAG         1
+#define TAG_XINGTAG         2
+#define TAG_LAMECBRTAG      3
+
+/*
+ * this value MUST be carefully choosen!
+ * (or some calculation will be needed, so boring)
+ * Current identification routines work for id3v2, apetag and wave riff,
+ * (the metadata tags we can usually find at the very beginning)
+ * and they require 10 bytes, 32 bytes and 12 bytes (just look at the code)
+ * at least.
+ * Should a new tag appear, this value will have to be evaluated again.
+ */
+#define HEAD_METADATA_MIN_IDENTIFICATION_LENGTH             32
+
+typedef struct id3tag {
+    unsigned char tag[3];
+    unsigned char title[30];
+    unsigned char artist[30];
+    unsigned char album[30];
+    unsigned char year[4];
+    unsigned char comment[30];
+    unsigned char genre;
+} id3tag;
+
+/* structure for MusicMatch tag */
+typedef struct mmtag_t {
+    unsigned int  tag_size;
+    unsigned int  image_size;
+    unsigned int  metadata_size;
+    off_t         image_offset;
+    char          mm_ver[5];   /* this field is actually four bytes long, this trick ensures there will always be a null string terminator */
+    char          tag_ver[5];  /* this field is actually four bytes long, this trick ensures there will always be a null string terminator */
+    char          enc_ver[5];  /* this field is actually four bytes long, this trick ensures there will always be a null string terminator */
+    char          image_ext[5];/* this field is actually four bytes long, this trick ensures there will always be a null string terminator */
+    char          header_present;
+} mmtag_t;
+
+/* structure to receive extracted header */
+typedef struct vbrtagdata_t
+{
+    char    *tagId;
+    off_t   tagStartsAt;
+    unsigned int     header;           /* mpeg header of the frame containing the tag */
+    int     frameSize;                 /* I want to keep the size of the frame containing the tag */
+    char    infoTag;
+    short   version;
+    /* The following two fields come from lame vbr tag - they differ from similar info
+       written by fhg encoders (stored into streamInfo structure) */
+    short   encDelay;                  /* encoder delay (start) */
+    short   encPadding;                /* encoder padding (samples added at the end of the wave) */
+    short   tocEntries;
+    short   sizePerTocEntry;
+    short   framesPerTocEntry;
+    int     tocSize;
+    unsigned int reported_frames;      /* total bit stream frames from Vbr header data */
+    unsigned int bytes;                /* total bit stream bytes from Vbr header data*/
+    int     vbr_scale;                 /* encoded vbr scale from Vbr header data*/
+    char    lame_buggy_vbrheader;
+    unsigned char lametag[LAMETAGSIZE];
+    char    lametagVerified;
+    int     lameMusicCRC;                  /* this is actually a ushort
+                                              but I need setting -1 for signaling empty value */
+} vbrtagdata_t;
+
+
+int  extract_enc_string(char *, unsigned char *, int);
+char checkvbrinfotag(vbrtagdata_t *, unsigned char *, off_t, char *);
+void show_info_tag (vbrtagdata_t *);
+void show_id3v1(id3tag *);
+int  checkid3v1(FILE *, off_t, id3tag *);
+int  checkid3v2_footer(FILE *, off_t, unsigned char *, unsigned char *);
+int  checkapetagx_tail(FILE *, off_t, int *, int *, char *);
+int  checklyrics3v1(FILE *, off_t);
+int  checklyrics3v2(FILE *, off_t);
+void checkmmtag(FILE *, off_t, mmtag_t *);
+char checkmm_partial_tag(FILE *, off_t, mmtag_t *);
+int  checkid3v2(unsigned char *, int, int *, unsigned char *, unsigned char *);
+int  checkapetagx_head(unsigned char *, int, int *, int *, int *, char *);
+int  checkwaveriff(unsigned char *, int, int *);
+int  checkwaveriff_datachunk(unsigned char *, int *, int *);
+
+int check_timing_shift_case(vbrtagdata_t *);
+
+#endif