firmware/export/id3.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Daniel Stenberg
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 #ifndef ID3_H
  20 #define ID3_H
  21
  22 #include <stdbool.h>
  23 #include "config.h"
  24 #include "file.h"
  25
  26 /* Audio file types. */
  27 /* NOTE: The values of the AFMT_* items are used for the %fc tag in the WPS
  28          - so new entries MUST be added to the end to maintain compatibility.
  29  */
  30 enum
  31 {
  32     AFMT_UNKNOWN = 0,  /* Unknown file format */
  33
  34     /* start formats */
  35
  36     AFMT_MPA_L1,       /* MPEG Audio layer 1 */
  37     AFMT_MPA_L2,       /* MPEG Audio layer 2 */
  38     AFMT_MPA_L3,       /* MPEG Audio layer 3 */
  39
  40 #if CONFIG_CODEC == SWCODEC
  41     AFMT_AIFF,         /* Audio Interchange File Format */
  42     AFMT_PCM_WAV,      /* Uncompressed PCM in a WAV file */
  43     AFMT_OGG_VORBIS,   /* Ogg Vorbis */
  44     AFMT_FLAC,         /* FLAC */
  45     AFMT_MPC,          /* Musepack */
  46     AFMT_A52,          /* A/52 (aka AC3) audio */
  47     AFMT_WAVPACK,      /* WavPack */
  48     AFMT_ALAC,         /* Apple Lossless Audio Codec */
  49     AFMT_AAC,          /* Advanced Audio Coding (AAC) in M4A container */
  50     AFMT_SHN,          /* Shorten */
  51     AFMT_SID,          /* SID File Format */
  52     AFMT_ADX,          /* ADX File Format */
  53     AFMT_NSF,          /* NESM (NES Sound Format) */
  54     AFMT_SPEEX,        /* Ogg Speex speech */
  55     AFMT_SPC,          /* SPC700 save state */
  56 #endif
  57
  58     /* add new formats at any index above this line to have a sensible order -
  59        specified array index inits are used */
  60     /* format arrays defined in id3.c */
  61
  62     AFMT_NUM_CODECS,
  63
  64 #if CONFIG_CODEC == SWCODEC && defined(HAVE_RECORDING)
  65     /* masks to decompose parts */
  66     CODEC_AFMT_MASK    = 0x0fff,
  67     CODEC_TYPE_MASK    = 0x7000,
  68
  69     /* switch for specifying codec type when requesting a filename */
  70     CODEC_TYPE_DECODER = (0 << 12), /* default */
  71     CODEC_TYPE_ENCODER = (1 << 12),
  72 #endif /* CONFIG_CODEC == SWCODEC && defined(HAVE_RECORDING) */
  73 };
  74
  75 #if CONFIG_CODEC == SWCODEC
  76 #define CODEC_EXTENSION "codec"
  77
  78 #ifdef HAVE_RECORDING
  79 #define ENCODER_SUFFIX  "_enc"
  80 enum rec_format_indexes
  81 {
  82     __REC_FORMAT_START_INDEX = -1,
  83
  84     /* start formats */
  85
  86     REC_FORMAT_PCM_WAV,
  87     REC_FORMAT_AIFF,
  88     REC_FORMAT_WAVPACK,
  89     REC_FORMAT_MPA_L3,
  90
  91     /* add new formats at any index above this line to have a sensible order -
  92        specified array index inits are used
  93        REC_FORMAT_CFG_NUM_BITS should allocate enough bits to hold the range
  94        REC_FORMAT_CFG_VALUE_LIST should be in same order as indexes
  95     */
  96
  97     REC_NUM_FORMATS,
  98
  99     REC_FORMAT_DEFAULT = REC_FORMAT_PCM_WAV,
 100     REC_FORMAT_CFG_NUM_BITS = 2
 101 };
 102
 103 #define REC_FORMAT_CFG_VAL_LIST "wave,aiff,wvpk,mpa3"
 104
 105 /* get REC_FORMAT_* corresponding AFMT_* */
 106 extern const int rec_format_afmt[REC_NUM_FORMATS];
 107 /* get AFMT_* corresponding REC_FORMAT_* */
 108 extern const int afmt_rec_format[AFMT_NUM_CODECS];
 109
 110 #define AFMT_ENTRY(label, root_fname, enc_root_fname, ext_list) \
 111     { label, root_fname, enc_root_fname, ext_list }
 112 #else /* !HAVE_RECORDING */
 113 #define AFMT_ENTRY(label, root_fname, enc_root_fname, ext_list) \
 114     { label, root_fname, ext_list }
 115 #endif /* HAVE_RECORDING */
 116 #else /* !SWCODEC */
 117
 118 #define AFMT_ENTRY(label, root_fname, enc_root_fname, ext_list) \
 119     { label, ext_list }
 120 #endif /* CONFIG_CODEC == SWCODEC */
 121
 122 /* record describing the audio format */
 123 struct afmt_entry
 124 {
 125     char label[8];      /* format label */
 126 #if CONFIG_CODEC == SWCODEC
 127     char *codec_root_fn; /* root codec filename (sans _enc and .codec) */
 128 #ifdef HAVE_RECORDING
 129     char *codec_enc_root_fn; /* filename of encoder codec */
 130 #endif
 131 #endif
 132     char *ext_list;     /* double NULL terminated extension
 133                            list for type with the first as
 134                            the default for recording */
 135 };
 136
 137 /* database of labels and codecs. add formats per above enum */
 138 extern const struct afmt_entry audio_formats[AFMT_NUM_CODECS];
 139
 140 struct mp3entry {
 141     char path[MAX_PATH];
 142     char* title;
 143     char* artist;
 144     char* album;
 145     char* genre_string;
 146     char* track_string;
 147     char* year_string;
 148     char* composer;
 149     char* comment;
 150     char* albumartist;
 151     int tracknum;
 152     int version;
 153     int layer;
 154     int year;
 155     unsigned char id3version;
 156     unsigned int codectype;
 157     unsigned int bitrate;
 158     unsigned long frequency;
 159     unsigned long id3v2len;
 160     unsigned long id3v1len;
 161     unsigned long first_frame_offset; /* Byte offset to first real MP3 frame.
 162                                          Used for skipping leading garbage to
 163                                          avoid gaps between tracks. */
 164     unsigned long vbr_header_pos;
 165     unsigned long filesize; /* without headers; in bytes */
 166     unsigned long length;   /* song length in ms */
 167     unsigned long elapsed;  /* ms played */
 168
 169     int lead_trim;          /* Number of samples to skip at the beginning */
 170     int tail_trim;          /* Number of samples to remove from the end */
 171
 172     /* Added for Vorbis */
 173     unsigned long samples;  /* number of samples in track */
 174
 175     /* MP3 stream specific info */
 176     unsigned long frame_count; /* number of frames in the file (if VBR) */
 177
 178     /* Used for A52/AC3 */
 179     unsigned long bytesperframe; /* number of bytes per frame (if CBR) */
 180
 181     /* Xing VBR fields */
 182     bool vbr;
 183     bool has_toc;           /* True if there is a VBR header in the file */
 184     unsigned char toc[100]; /* table of contents */
 185
 186     /* these following two fields are used for local buffering */
 187     char id3v2buf[300];
 188     char id3v1buf[4][92];
 189
 190     /* resume related */
 191     unsigned long offset;  /* bytes played */
 192     int index;             /* playlist index */
 193
 194     /* FileEntry fields */
 195     long fileentryoffset;
 196     long filehash;
 197     long songentryoffset;
 198     long rundbentryoffset;
 199
 200     /* runtime database fields */
 201     short rating;
 202     long playcount;
 203     long lastplayed;
 204
 205     /* replaygain support */
 206
 207 #if CONFIG_CODEC == SWCODEC
 208     char* track_gain_string;
 209     char* album_gain_string;
 210     long track_gain;    /* 7.24 signed fixed point. 0 for no gain. */
 211     long album_gain;
 212     long track_peak;    /* 7.24 signed fixed point. 0 for no peak. */
 213     long album_peak;
 214 #endif
 215
 216     /* Cuesheet support */
 217     int cuesheet_type;      /* 0: none, 1: external, 2: embedded */
 218 };
 219
 220 enum {
 221     ID3_VER_1_0 = 1,
 222     ID3_VER_1_1,
 223     ID3_VER_2_2,
 224     ID3_VER_2_3,
 225     ID3_VER_2_4
 226 };
 227
 228 bool get_mp3_metadata(int fd, struct mp3entry *entry, const char *filename, bool v1first);
 229 bool mp3info(struct mp3entry *entry, const char *filename, bool v1first);
 230 char* id3_get_num_genre(const unsigned int genre_num);
 231 char* id3_get_codec(const struct mp3entry* id3);
 232 int getid3v2len(int fd);
 233 void adjust_mp3entry(struct mp3entry *entry, void *dest, void *orig);
 234 void copy_mp3entry(struct mp3entry *dest, struct mp3entry *orig);
 235
 236 #endif