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authorSean Bartell <wingedtachikoma@gmail.com>2011-06-24 01:25:21 -0400
committerNils Wallménius <nils@rockbox.org>2012-03-18 12:00:39 +0100
commitb5716df4cb2837bbbc42195cf1aefcf03e21d6a6 (patch)
tree130cd712e2e00893b6df9959a375a8d9523a1aca /apps/metadata/id3tags.c
parent24bd9d5393dbe39a5c6194877bc00ede669b1d5d (diff)
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Build librbcodec with DSP and metadata.
All associated files are moved to /lib/rbcodec. Change-Id: I572ddd2b8a996aae1e98c081d06b1ed356dce222
Diffstat (limited to 'apps/metadata/id3tags.c')
-rw-r--r--apps/metadata/id3tags.c1199
1 files changed, 0 insertions, 1199 deletions
diff --git a/apps/metadata/id3tags.c b/apps/metadata/id3tags.c
deleted file mode 100644
index 2dd1c662ed..0000000000
--- a/apps/metadata/id3tags.c
+++ /dev/null
@@ -1,1199 +0,0 @@
-/***************************************************************************
- * __________ __ ___.
- * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- * \/ \/ \/ \/ \/
- * $Id$
- *
- * Copyright (C) 2002 by Daniel Stenberg
- *
- * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- ****************************************************************************/
-/*
- * Parts of this code has been stolen from the Ample project and was written
- * by David H�deman. It has since been extended and enhanced pretty much by
- * all sorts of friendly Rockbox people.
- *
- */
-
- /* tagResolver and associated code copyright 2003 Thomas Paul Diffenbach
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <ctype.h>
-#include "string-extra.h"
-#include "config.h"
-#include "file.h"
-#include "logf.h"
-#include "system.h"
-#include "replaygain.h"
-#include "rbunicode.h"
-
-#include "metadata.h"
-#include "mp3data.h"
-#if CONFIG_CODEC == SWCODEC
-#include "metadata_common.h"
-#endif
-#include "metadata_parsers.h"
-#include "misc.h"
-
-static unsigned long unsync(unsigned long b0,
- unsigned long b1,
- unsigned long b2,
- unsigned long b3)
-{
- return (((long)(b0 & 0x7F) << (3*7)) |
- ((long)(b1 & 0x7F) << (2*7)) |
- ((long)(b2 & 0x7F) << (1*7)) |
- ((long)(b3 & 0x7F) << (0*7)));
-}
-
-static const char* const genres[] = {
- "Blues", "Classic Rock", "Country", "Dance", "Disco", "Funk", "Grunge",
- "Hip-Hop", "Jazz", "Metal", "New Age", "Oldies", "Other", "Pop", "R&B",
- "Rap", "Reggae", "Rock", "Techno", "Industrial", "Alternative", "Ska",
- "Death Metal", "Pranks", "Soundtrack", "Euro-Techno", "Ambient", "Trip-Hop",
- "Vocal", "Jazz+Funk", "Fusion", "Trance", "Classical", "Instrumental",
- "Acid", "House", "Game", "Sound Clip", "Gospel", "Noise", "AlternRock",
- "Bass", "Soul", "Punk", "Space", "Meditative", "Instrumental Pop",
- "Instrumental Rock", "Ethnic", "Gothic", "Darkwave", "Techno-Industrial",
- "Electronic", "Pop-Folk", "Eurodance", "Dream", "Southern Rock", "Comedy",
- "Cult", "Gangsta", "Top 40", "Christian Rap", "Pop/Funk", "Jungle",
- "Native American", "Cabaret", "New Wave", "Psychadelic", "Rave",
- "Showtunes", "Trailer", "Lo-Fi", "Tribal", "Acid Punk", "Acid Jazz",
- "Polka", "Retro", "Musical", "Rock & Roll", "Hard Rock",
-
- /* winamp extensions */
- "Folk", "Folk-Rock", "National Folk", "Swing", "Fast Fusion", "Bebob",
- "Latin", "Revival", "Celtic", "Bluegrass", "Avantgarde", "Gothic Rock",
- "Progressive Rock", "Psychedelic Rock", "Symphonic Rock", "Slow Rock",
- "Big Band", "Chorus", "Easy Listening", "Acoustic", "Humour", "Speech",
- "Chanson", "Opera", "Chamber Music", "Sonata", "Symphony", "Booty Bass",
- "Primus", "Porn Groove", "Satire", "Slow Jam", "Club", "Tango", "Samba",
- "Folklore", "Ballad", "Power Ballad", "Rhythmic Soul", "Freestyle",
- "Duet", "Punk Rock", "Drum Solo", "A capella", "Euro-House", "Dance Hall",
- "Goa", "Drum & Bass", "Club-House", "Hardcore", "Terror", "Indie",
- "BritPop", "Negerpunk", "Polsk Punk", "Beat", "Christian Gangsta Rap",
- "Heavy Metal", "Black Metal", "Crossover", "Contemporary Christian",
- "Christian Rock", "Merengue", "Salsa", "Thrash Metal", "Anime", "Jpop",
- "Synthpop"
-};
-
-#if CONFIG_CODEC != SWCODEC
-static
-#endif
-char* id3_get_num_genre(unsigned int genre_num)
-{
- if (genre_num < ARRAYLEN(genres))
- return (char*)genres[genre_num];
- return NULL;
-}
-
-/*
- HOW TO ADD ADDITIONAL ID3 VERSION 2 TAGS
- Code and comments by Thomas Paul Diffenbach
-
- To add another ID3v2 Tag, do the following:
- 1. add a char* named for the tag to struct mp3entry in id3.h,
- (I (tpd) prefer to use char* rather than ints, even for what seems like
- numerical values, for cases where a number won't do, e.g.,
- YEAR: "circa 1765", "1790/1977" (composed/performed), "28 Feb 1969"
- TRACK: "1/12", "1 of 12", GENRE: "Freeform genre name"
- Text is more flexible, and as the main use of id3 data is to
- display it, converting it to an int just means reconverting to
- display it, at a runtime cost.)
-
- 2. If any special processing beyond copying the tag value from the Id3
- block to the struct mp3entry is rrequired (such as converting to an
- int), write a function to perform this special processing.
-
- This function's prototype must match that of
- typedef tagPostProcessFunc, that is it must be:
- int func( struct mp3entry*, char* tag, int bufferpos )
- the first argument is a pointer to the current mp3entry structure the
- second argument is a pointer to the null terminated string value of the
- tag found the third argument is the offset of the next free byte in the
- mp3entry's buffer your function should return the corrected offset; if
- you don't lengthen or shorten the tag string, you can return the third
- argument unchanged.
-
- Unless you have a good reason no to, make the function static.
- TO JUST COPY THE TAG NO SPECIAL PROCESSING FUNCTION IS NEEDED.
-
- 3. add one or more entries to the tagList array, using the format:
- char* ID3 Tag symbolic name -- see the ID3 specification for these,
- sizeof() that name minus 1,
- offsetof( struct mp3entry, variable_name_in_struct_mp3entry ),
- pointer to your special processing function or NULL
- if you need no special processing
- flag indicating if this tag is binary or textual
- Many ID3 symbolic names come in more than one form. You can add both
- forms, each referencing the same variable in struct mp3entry.
- If both forms are present, the last found will be used.
- Note that the offset can be zero, in which case no entry will be set
- in the mp3entry struct; the frame is still read into the buffer and
- the special processing function is called (several times, if there
- are several frames with the same name).
-
- 4. Alternately, use the TAG_LIST_ENTRY macro with
- ID3 tag symbolic name,
- variable in struct mp3entry,
- special processing function address
-
- 5. Add code to wps-display.c function get_tag to assign a printf-like
- format specifier for the tag */
-
-/* Structure for ID3 Tag extraction information */
-struct tag_resolver {
- const char* tag;
- int tag_length;
- size_t offset;
- int (*ppFunc)(struct mp3entry*, char* tag, int bufferpos);
- bool binary;
-};
-
-static bool global_ff_found;
-
-static int unsynchronize(char* tag, int len, bool *ff_found)
-{
- int i;
- unsigned char c;
- unsigned char *rp, *wp;
-
- wp = rp = (unsigned char *)tag;
-
- rp = (unsigned char *)tag;
- for(i = 0;i < len;i++) {
- /* Read the next byte and write it back, but don't increment the
- write pointer */
- c = *rp++;
- *wp = c;
- if(*ff_found) {
- /* Increment the write pointer if it isn't an unsynch pattern */
- if(c != 0)
- wp++;
- *ff_found = false;
- } else {
- if(c == 0xff)
- *ff_found = true;
- wp++;
- }
- }
- return (long)wp - (long)tag;
-}
-
-static int unsynchronize_frame(char* tag, int len)
-{
- bool ff_found = false;
-
- return unsynchronize(tag, len, &ff_found);
-}
-
-static int read_unsynched(int fd, void *buf, int len)
-{
- int i;
- int rc;
- int remaining = len;
- char *wp;
- char *rp;
-
- wp = buf;
-
- while(remaining) {
- rp = wp;
- rc = read(fd, rp, remaining);
- if(rc <= 0)
- return rc;
-
- i = unsynchronize(wp, remaining, &global_ff_found);
- remaining -= i;
- wp += i;
- }
-
- return len;
-}
-
-static int skip_unsynched(int fd, int len)
-{
- int rc;
- int remaining = len;
- int rlen;
- char buf[32];
-
- while(remaining) {
- rlen = MIN(sizeof(buf), (unsigned int)remaining);
- rc = read(fd, buf, rlen);
- if(rc <= 0)
- return rc;
-
- remaining -= unsynchronize(buf, rlen, &global_ff_found);
- }
-
- return len;
-}
-
-/* parse numeric value from string */
-static int parsetracknum( struct mp3entry* entry, char* tag, int bufferpos )
-{
- entry->tracknum = atoi( tag );
- return bufferpos;
-}
-
-/* parse numeric value from string */
-static int parsediscnum( struct mp3entry* entry, char* tag, int bufferpos )
-{
- entry->discnum = atoi( tag );
- return bufferpos;
-}
-
-/* parse numeric value from string */
-static int parseyearnum( struct mp3entry* entry, char* tag, int bufferpos )
-{
- entry->year = atoi( tag );
- return bufferpos;
-}
-
-/* parse numeric genre from string, version 2.2 and 2.3 */
-static int parsegenre( struct mp3entry* entry, char* tag, int bufferpos )
-{
- /* Use bufferpos to hold current position in entry->id3v2buf. */
- bufferpos = tag - entry->id3v2buf;
-
- if(entry->id3version >= ID3_VER_2_4) {
- /* In version 2.4 and up, there are no parentheses, and the genre frame
- is a list of strings, either numbers or text. */
-
- /* Is it a number? */
- if(isdigit(tag[0])) {
- entry->genre_string = id3_get_num_genre(atoi( tag ));
- return bufferpos;
- } else {
- entry->genre_string = tag;
- return bufferpos + strlen(tag) + 1;
- }
- } else {
- if( tag[0] == '(' && tag[1] != '(' ) {
- entry->genre_string = id3_get_num_genre(atoi( tag + 1 ));
- return bufferpos;
- }
- else {
- entry->genre_string = tag;
- return bufferpos + strlen(tag) + 1;
- }
- }
-}
-
-#ifdef HAVE_ALBUMART
-/* parse embed albumart */
-static int parsealbumart( struct mp3entry* entry, char* tag, int bufferpos )
-{
- entry->has_embedded_albumart = false;
-
- /* we currently don't support unsynchronizing albumart */
- if (entry->albumart.type == AA_TYPE_UNSYNC)
- return bufferpos;
-
- entry->albumart.type = AA_TYPE_UNKNOWN;
-
- char *start = tag;
- /* skip text encoding */
- tag += 1;
-
- if (memcmp(tag, "image/", 6) == 0)
- {
- /* ID3 v2.3+ */
- tag += 6;
- if (strcmp(tag, "jpeg") == 0)
- {
- entry->albumart.type = AA_TYPE_JPG;
- tag += 5;
- }
- else if (strcmp(tag, "png") == 0)
- {
- entry->albumart.type = AA_TYPE_PNG;
- tag += 4;
- }
- }
- else
- {
- /* ID3 v2.2 */
- if (memcmp(tag, "JPG", 3) == 0)
- entry->albumart.type = AA_TYPE_JPG;
- else if (memcmp(tag, "PNG", 3) == 0)
- entry->albumart.type = AA_TYPE_PNG;
- tag += 3;
- }
-
- if (entry->albumart.type != AA_TYPE_UNKNOWN)
- {
- /* skip picture type */
- tag += 1;
- /* skip description */
- tag = strchr(tag, '\0') + 1;
- /* fixup offset&size for image data */
- entry->albumart.pos += tag - start;
- entry->albumart.size -= tag - start;
- entry->has_embedded_albumart = true;
- }
- /* return bufferpos as we didn't store anything in id3v2buf */
- return bufferpos;
-}
-#endif
-
-/* parse user defined text, looking for album artist and replaygain
- * information.
- */
-static int parseuser( struct mp3entry* entry, char* tag, int bufferpos )
-{
- char* value = NULL;
- int desc_len = strlen(tag);
- int length = 0;
-
- if ((tag - entry->id3v2buf + desc_len + 2) < bufferpos) {
- /* At least part of the value was read, so we can safely try to
- * parse it */
- value = tag + desc_len + 1;
-
- if (!strcasecmp(tag, "ALBUM ARTIST")) {
- length = strlen(value) + 1;
- strlcpy(tag, value, length);
- entry->albumartist = tag;
-#if CONFIG_CODEC == SWCODEC
- } else {
- /* Call parse_replaygain(). */
- parse_replaygain(tag, value, entry);
-#endif
- }
- }
-
- return tag - entry->id3v2buf + length;
-}
-
-#if CONFIG_CODEC == SWCODEC
-/* parse RVA2 binary data and convert to replaygain information. */
-static int parserva2( struct mp3entry* entry, char* tag, int bufferpos)
-{
- int desc_len = strlen(tag);
- int start_pos = tag - entry->id3v2buf;
- int end_pos = start_pos + desc_len + 5;
- unsigned char* value = tag + desc_len + 1;
-
- /* Only parse RVA2 replaygain tags if tag version == 2.4 and channel
- * type is master volume.
- */
- if (entry->id3version == ID3_VER_2_4 && end_pos < bufferpos
- && *value++ == 1) {
- long gain = 0;
- long peak = 0;
- long peakbits;
- long peakbytes;
- bool album = false;
-
- /* The RVA2 specification is unclear on some things (id string and
- * peak volume), but this matches how Quod Libet use them.
- */
-
- gain = (int16_t) ((value[0] << 8) | value[1]);
- value += 2;
- peakbits = *value++;
- peakbytes = (peakbits + 7) / 8;
-
- /* Only use the topmost 24 bits for peak volume */
- if (peakbytes > 3) {
- peakbytes = 3;
- }
-
- /* Make sure the peak bits were read */
- if (end_pos + peakbytes < bufferpos) {
- long shift = ((8 - (peakbits & 7)) & 7) + (3 - peakbytes) * 8;
-
- for ( ; peakbytes; peakbytes--) {
- peak <<= 8;
- peak += *value++;
- }
-
- peak <<= shift;
-
- if (peakbits > 24) {
- peak += *value >> (8 - shift);
- }
- }
-
- if (strcasecmp(tag, "album") == 0) {
- album = true;
- } else if (strcasecmp(tag, "track") != 0) {
- /* Only accept non-track values if we don't have any previous
- * value.
- */
- if (entry->track_gain != 0) {
- return start_pos;
- }
- }
-
- parse_replaygain_int(album, gain, peak * 2, entry);
- }
-
- return start_pos;
-}
-#endif
-
-static int parsembtid( struct mp3entry* entry, char* tag, int bufferpos )
-{
- char* value = NULL;
- int desc_len = strlen(tag);
- /*DEBUGF("MBID len: %d\n", desc_len);*/
- /* Musicbrainz track IDs are always 36 chars long */
- const size_t mbtid_len = 36;
-
- if ((tag - entry->id3v2buf + desc_len + 2) < bufferpos)
- {
- value = tag + desc_len + 1;
-
- if (strcasecmp(tag, "http://musicbrainz.org") == 0)
- {
- if (mbtid_len == strlen(value))
- {
- entry->mb_track_id = value;
- return bufferpos + mbtid_len + 1;
- }
- }
- }
-
- return bufferpos;
-}
-
-static const struct tag_resolver taglist[] = {
- { "TPE1", 4, offsetof(struct mp3entry, artist), NULL, false },
- { "TP1", 3, offsetof(struct mp3entry, artist), NULL, false },
- { "TIT2", 4, offsetof(struct mp3entry, title), NULL, false },
- { "TT2", 3, offsetof(struct mp3entry, title), NULL, false },
- { "TALB", 4, offsetof(struct mp3entry, album), NULL, false },
- { "TAL", 3, offsetof(struct mp3entry, album), NULL, false },
- { "TRK", 3, offsetof(struct mp3entry, track_string), &parsetracknum, false },
- { "TPOS", 4, offsetof(struct mp3entry, disc_string), &parsediscnum, false },
- { "TPA", 3, offsetof(struct mp3entry, disc_string), &parsediscnum, false },
- { "TRCK", 4, offsetof(struct mp3entry, track_string), &parsetracknum, false },
- { "TDRC", 4, offsetof(struct mp3entry, year_string), &parseyearnum, false },
- { "TYER", 4, offsetof(struct mp3entry, year_string), &parseyearnum, false },
- { "TYE", 3, offsetof(struct mp3entry, year_string), &parseyearnum, false },
- { "TCOM", 4, offsetof(struct mp3entry, composer), NULL, false },
- { "TCM", 3, offsetof(struct mp3entry, composer), NULL, false },
- { "TPE2", 4, offsetof(struct mp3entry, albumartist), NULL, false },
- { "TP2", 3, offsetof(struct mp3entry, albumartist), NULL, false },
- { "TIT1", 4, offsetof(struct mp3entry, grouping), NULL, false },
- { "TT1", 3, offsetof(struct mp3entry, grouping), NULL, false },
- { "COMM", 4, offsetof(struct mp3entry, comment), NULL, false },
- { "COM", 3, offsetof(struct mp3entry, comment), NULL, false },
- { "TCON", 4, offsetof(struct mp3entry, genre_string), &parsegenre, false },
- { "TCO", 3, offsetof(struct mp3entry, genre_string), &parsegenre, false },
-#ifdef HAVE_ALBUMART
- { "APIC", 4, 0, &parsealbumart, true },
- { "PIC", 3, 0, &parsealbumart, true },
-#endif
- { "TXXX", 4, 0, &parseuser, false },
-#if CONFIG_CODEC == SWCODEC
- { "RVA2", 4, 0, &parserva2, true },
-#endif
- { "UFID", 4, 0, &parsembtid, false },
-};
-
-#define TAGLIST_SIZE ((int)ARRAYLEN(taglist))
-
-/* Get the length of an ID3 string in the given encoding. Returns the length
- * in bytes, including end nil, or -1 if the encoding is unknown.
- */
-static int unicode_len(char encoding, const void* string)
-{
- int len = 0;
-
- if (encoding == 0x01 || encoding == 0x02) {
- char first;
- const char *s = string;
- /* string might be unaligned, so using short* can crash on ARM and SH1 */
- do {
- first = *s++;
- } while ((first | *s++) != 0);
-
- len = s - (const char*) string;
- } else {
- len = strlen((char*) string) + 1;
- }
-
- return len;
-}
-
-/* Checks to see if the passed in string is a 16-bit wide Unicode v2
- string. If it is, we convert it to a UTF-8 string. If it's not unicode,
- we convert from the default codepage */
-static int unicode_munge(char* string, char* utf8buf, int *len) {
- long tmp;
- bool le = false;
- int i = 0;
- unsigned char *str = (unsigned char *)string;
- int templen = 0;
- unsigned char* utf8 = (unsigned char *)utf8buf;
-
- switch (str[0]) {
- case 0x00: /* Type 0x00 is ordinary ISO 8859-1 */
- str++;
- (*len)--;
- utf8 = iso_decode(str, utf8, -1, *len);
- *utf8 = 0;
- *len = (unsigned long)utf8 - (unsigned long)utf8buf;
- break;
-
- case 0x01: /* Unicode with or without BOM */
- case 0x02:
- (*len)--;
- str++;
-
- /* Handle frames with more than one string
- (needed for TXXX frames).*/
- do {
- tmp = bytes2int(0, 0, str[0], str[1]);
-
- /* Now check if there is a BOM
- (zero-width non-breaking space, 0xfeff)
- and if it is in little or big endian format */
- if(tmp == 0xfffe) { /* Little endian? */
- le = true;
- str += 2;
- (*len)-=2;
- } else if(tmp == 0xfeff) { /* Big endian? */
- str += 2;
- (*len)-=2;
- } else
- /* If there is no BOM (which is a specification violation),
- let's try to guess it. If one of the bytes is 0x00, it is
- probably the most significant one. */
- if(str[1] == 0)
- le = true;
-
- while ((i < *len) && (str[0] || str[1])) {
- if(le)
- utf8 = utf16LEdecode(str, utf8, 1);
- else
- utf8 = utf16BEdecode(str, utf8, 1);
-
- str+=2;
- i += 2;
- }
-
- *utf8++ = 0; /* Terminate the string */
- templen += (strlen(&utf8buf[templen]) + 1);
- str += 2;
- i+=2;
- } while(i < *len);
- *len = templen - 1;
- break;
-
- case 0x03: /* UTF-8 encoded string */
- for(i=0; i < *len; i++)
- utf8[i] = str[i+1];
- (*len)--;
- break;
-
- default: /* Plain old string */
- utf8 = iso_decode(str, utf8, -1, *len);
- *utf8 = 0;
- *len = (unsigned long)utf8 - (unsigned long)utf8buf;
- break;
- }
- return 0;
-}
-
-/*
- * Sets the title of an MP3 entry based on its ID3v1 tag.
- *
- * Arguments: file - the MP3 file to scen for a ID3v1 tag
- * entry - the entry to set the title in
- *
- * Returns: true if a title was found and created, else false
- */
-bool setid3v1title(int fd, struct mp3entry *entry)
-{
- unsigned char buffer[128];
- static const char offsets[] = {3, 33, 63, 97, 93, 125, 127};
- int i, j;
- unsigned char* utf8;
-
- if (-1 == lseek(fd, -128, SEEK_END))
- return false;
-
- if (read(fd, buffer, sizeof buffer) != sizeof buffer)
- return false;
-
- if (strncmp((char *)buffer, "TAG", 3))
- return false;
-
- entry->id3v1len = 128;
- entry->id3version = ID3_VER_1_0;
-
- for (i=0; i < (int)sizeof offsets; i++) {
- unsigned char* ptr = (unsigned char *)buffer + offsets[i];
-
- switch(i) {
- case 0:
- case 1:
- case 2:
- /* kill trailing space in strings */
- for (j=29; j && (ptr[j]==0 || ptr[j]==' '); j--)
- ptr[j] = 0;
- /* convert string to utf8 */
- utf8 = (unsigned char *)entry->id3v1buf[i];
- utf8 = iso_decode(ptr, utf8, -1, 30);
- /* make sure string is terminated */
- *utf8 = 0;
- break;
-
- case 3:
- /* kill trailing space in strings */
- for (j=27; j && (ptr[j]==0 || ptr[j]==' '); j--)
- ptr[j] = 0;
- /* convert string to utf8 */
- utf8 = (unsigned char *)entry->id3v1buf[3];
- utf8 = iso_decode(ptr, utf8, -1, 28);
- /* make sure string is terminated */
- *utf8 = 0;
- break;
-
- case 4:
- ptr[4] = 0;
- entry->year = atoi((char *)ptr);
- break;
-
- case 5:
- /* id3v1.1 uses last two bytes of comment field for track
- number: first must be 0 and second is track num */
- if (!ptr[0] && ptr[1]) {
- entry->tracknum = ptr[1];
- entry->id3version = ID3_VER_1_1;
- }
- break;
-
- case 6:
- /* genre */
- entry->genre_string = id3_get_num_genre(ptr[0]);
- break;
- }
- }
-
- entry->title = entry->id3v1buf[0];
- entry->artist = entry->id3v1buf[1];
- entry->album = entry->id3v1buf[2];
- entry->comment = entry->id3v1buf[3];
-
- return true;
-}
-
-
-/*
- * Sets the title of an MP3 entry based on its ID3v2 tag.
- *
- * Arguments: file - the MP3 file to scan for a ID3v2 tag
- * entry - the entry to set the title in
- *
- * Returns: true if a title was found and created, else false
- */
-void setid3v2title(int fd, struct mp3entry *entry)
-{
- int minframesize;
- int size;
- long bufferpos = 0, totframelen, framelen;
- char header[10];
- char tmp[4];
- unsigned char version;
- char *buffer = entry->id3v2buf;
- int bytesread = 0;
- int buffersize = sizeof(entry->id3v2buf);
- unsigned char global_flags;
- int flags;
- bool global_unsynch = false;
- bool unsynch = false;
- int i, j;
- int rc;
-#if CONFIG_CODEC == SWCODEC
- bool itunes_gapless = false;
-#endif
-
- global_ff_found = false;
-
- /* Bail out if the tag is shorter than 10 bytes */
- if(entry->id3v2len < 10)
- return;
-
- /* Read the ID3 tag version from the header */
- lseek(fd, 0, SEEK_SET);
- if(10 != read(fd, header, 10))
- return;
-
- /* Get the total ID3 tag size */
- size = entry->id3v2len - 10;
-
- version = header[3];
- switch ( version ) {
- case 2:
- version = ID3_VER_2_2;
- minframesize = 8;
- break;
-
- case 3:
- version = ID3_VER_2_3;
- minframesize = 12;
- break;
-
- case 4:
- version = ID3_VER_2_4;
- minframesize = 12;
- break;
-
- default:
- /* unsupported id3 version */
- return;
- }
- entry->id3version = version;
- entry->tracknum = entry->year = entry->discnum = 0;
- entry->title = entry->artist = entry->album = NULL; /* FIXME incomplete */
-
- global_flags = header[5];
-
- /* Skip the extended header if it is present */
- if(global_flags & 0x40) {
- if(version == ID3_VER_2_3) {
- if(10 != read(fd, header, 10))
- return;
- /* The 2.3 extended header size doesn't include the header size
- field itself. Also, it is not unsynched. */
- framelen =
- bytes2int(header[0], header[1], header[2], header[3]) + 4;
-
- /* Skip the rest of the header */
- lseek(fd, framelen - 10, SEEK_CUR);
- }
-
- if(version >= ID3_VER_2_4) {
- if(4 != read(fd, header, 4))
- return;
-
- /* The 2.4 extended header size does include the entire header,
- so here we can just skip it. This header is unsynched. */
- framelen = unsync(header[0], header[1],
- header[2], header[3]);
-
- lseek(fd, framelen - 4, SEEK_CUR);
- }
- }
-
- /* Is unsynchronization applied? */
- if(global_flags & 0x80) {
- global_unsynch = true;
- }
-
- /*
- * We must have at least minframesize bytes left for the
- * remaining frames to be interesting
- */
- while (size >= minframesize && bufferpos < buffersize - 1) {
- flags = 0;
-
- /* Read frame header and check length */
- if(version >= ID3_VER_2_3) {
- if(global_unsynch && version <= ID3_VER_2_3)
- rc = read_unsynched(fd, header, 10);
- else
- rc = read(fd, header, 10);
- if(rc != 10)
- return;
- /* Adjust for the 10 bytes we read */
- size -= 10;
-
- flags = bytes2int(0, 0, header[8], header[9]);
-
- if (version >= ID3_VER_2_4) {
- framelen = unsync(header[4], header[5],
- header[6], header[7]);
- } else {
- /* version .3 files don't use synchsafe ints for
- * size */
- framelen = bytes2int(header[4], header[5],
- header[6], header[7]);
- }
- } else {
- if(6 != read(fd, header, 6))
- return;
- /* Adjust for the 6 bytes we read */
- size -= 6;
-
- framelen = bytes2int(0, header[3], header[4], header[5]);
- }
-
- logf("framelen = %ld, flags = 0x%04x", framelen, flags);
- if(framelen == 0){
- if (header[0] == 0 && header[1] == 0 && header[2] == 0)
- return;
- else
- continue;
- }
-
- unsynch = false;
-
- if(flags)
- {
- if (version >= ID3_VER_2_4) {
- if(flags & 0x0040) { /* Grouping identity */
- lseek(fd, 1, SEEK_CUR); /* Skip 1 byte */
- framelen--;
- }
- } else {
- if(flags & 0x0020) { /* Grouping identity */
- lseek(fd, 1, SEEK_CUR); /* Skip 1 byte */
- framelen--;
- }
- }
-
- if(flags & 0x000c) /* Compression or encryption */
- {
- /* Skip it */
- size -= framelen;
- lseek(fd, framelen, SEEK_CUR);
- continue;
- }
-
- if(flags & 0x0002) /* Unsynchronization */
- unsynch = true;
-
- if (version >= ID3_VER_2_4) {
- if(flags & 0x0001) { /* Data length indicator */
- if(4 != read(fd, tmp, 4))
- return;
-
- /* We don't need the data length */
- framelen -= 4;
- }
- }
- }
-
- if (framelen == 0)
- continue;
-
- if (framelen < 0)
- return;
-
- /* Keep track of the remaining frame size */
- totframelen = framelen;
-
- /* If the frame is larger than the remaining buffer space we try
- to read as much as would fit in the buffer */
- if(framelen >= buffersize - bufferpos)
- framelen = buffersize - bufferpos - 1;
-
- /* Limit the maximum length of an id3 data item to ID3V2_MAX_ITEM_SIZE
- bytes. This reduces the chance that the available buffer is filled
- by single metadata items like large comments. */
- if (ID3V2_MAX_ITEM_SIZE < framelen)
- framelen = ID3V2_MAX_ITEM_SIZE;
-
- logf("id3v2 frame: %.4s", header);
-
- /* Check for certain frame headers
-
- 'size' is the amount of frame bytes remaining. We decrement it by
- the amount of bytes we read. If we fail to read as many bytes as
- we expect, we assume that we can't read from this file, and bail
- out.
-
- For each frame. we will iterate over the list of supported tags,
- and read the tag into entry's buffer. All tags will be kept as
- strings, for cases where a number won't do, e.g., YEAR: "circa
- 1765", "1790/1977" (composed/performed), "28 Feb 1969" TRACK:
- "1/12", "1 of 12", GENRE: "Freeform genre name" Text is more
- flexible, and as the main use of id3 data is to display it,
- converting it to an int just means reconverting to display it, at a
- runtime cost.
-
- For tags that the current code does convert to ints, a post
- processing function will be called via a pointer to function. */
-
- for (i=0; i<TAGLIST_SIZE; i++) {
- const struct tag_resolver* tr = &taglist[i];
- char** ptag = tr->offset ? (char**) (((char*)entry) + tr->offset)
- : NULL;
- char* tag;
-
- /* Only ID3_VER_2_2 uses frames with three-character names. */
- if (((version == ID3_VER_2_2) && (tr->tag_length != 3))
- || ((version > ID3_VER_2_2) && (tr->tag_length != 4))) {
- continue;
- }
-
- if( !memcmp( header, tr->tag, tr->tag_length ) ) {
-
- /* found a tag matching one in tagList, and not yet filled */
- tag = buffer + bufferpos;
-
- if(global_unsynch && version <= ID3_VER_2_3)
- bytesread = read_unsynched(fd, tag, framelen);
- else
- bytesread = read(fd, tag, framelen);
-
- if( bytesread != framelen )
- return;
-
- size -= bytesread;
-
- if(unsynch || (global_unsynch && version >= ID3_VER_2_4))
- bytesread = unsynchronize_frame(tag, bytesread);
-
- /* the COMM frame has a 3 char field to hold an ISO-639-1
- * language string and an optional short description;
- * remove them so unicode_munge can work correctly
- */
-
- if((tr->tag_length == 4 && !memcmp( header, "COMM", 4)) ||
- (tr->tag_length == 3 && !memcmp( header, "COM", 3))) {
- int offset;
- if(bytesread >= 8 && !strncmp(tag+4, "iTun", 4)) {
-#if CONFIG_CODEC == SWCODEC
- /* check for iTunes gapless information */
- if(bytesread >= 12 && !strncmp(tag+4, "iTunSMPB", 8))
- itunes_gapless = true;
- else
-#endif
- /* ignore other with iTunes tags */
- break;
- }
-
- offset = 3 + unicode_len(*tag, tag + 4);
- if(bytesread > offset) {
- bytesread -= offset;
- memmove(tag + 1, tag + 1 + offset, bytesread - 1);
- }
- }
-
- /* Attempt to parse Unicode string only if the tag contents
- aren't binary */
- if(!tr->binary) {
- /* UTF-8 could potentially be 3 times larger */
- /* so we need to create a new buffer */
- char utf8buf[(3 * bytesread) + 1];
-
- unicode_munge( tag, utf8buf, &bytesread );
-
- if(bytesread >= buffersize - bufferpos)
- bytesread = buffersize - bufferpos - 1;
-
- if ( /* Is it an embedded cuesheet? */
- (tr->tag_length == 4 && !memcmp(header, "TXXX", 4)) &&
- (bytesread >= 14 && !strncmp(utf8buf, "CUESHEET", 8))
- ) {
- unsigned char char_enc = 0;
- /* [enc type]+"CUESHEET\0" = 10 */
- unsigned char cuesheet_offset = 10;
- switch (tag[0]) {
- case 0x00:
- char_enc = CHAR_ENC_ISO_8859_1;
- break;
- case 0x01:
- tag++;
- if (!memcmp(tag,
- BOM_UTF_16_BE, BOM_UTF_16_SIZE)) {
- char_enc = CHAR_ENC_UTF_16_BE;
- } else if (!memcmp(tag,
- BOM_UTF_16_LE, BOM_UTF_16_SIZE)) {
- char_enc = CHAR_ENC_UTF_16_LE;
- }
- /* \1 + BOM(2) + C0U0E0S0H0E0E0T000 = 21 */
- cuesheet_offset = 21;
- break;
- case 0x02:
- char_enc = CHAR_ENC_UTF_16_BE;
- /* \2 + 0C0U0E0S0H0E0E0T00 = 19 */
- cuesheet_offset = 19;
- break;
- case 0x03:
- char_enc = CHAR_ENC_UTF_8;
- break;
- }
- if (char_enc > 0) {
- entry->has_embedded_cuesheet = true;
- entry->embedded_cuesheet.pos = lseek(fd, 0, SEEK_CUR)
- - framelen + cuesheet_offset;
- entry->embedded_cuesheet.size = totframelen
- - cuesheet_offset;
- entry->embedded_cuesheet.encoding = char_enc;
- }
- break;
- }
-
- for (j = 0; j < bytesread; j++)
- tag[j] = utf8buf[j];
-
- /* remove trailing spaces */
- while ( bytesread > 0 && isspace(tag[bytesread-1]))
- bytesread--;
- }
-
- if(bytesread == 0)
- /* Skip empty frames */
- break;
-
- tag[bytesread] = 0;
- bufferpos += bytesread + 1;
-
-#if CONFIG_CODEC == SWCODEC
- /* parse the tag if it contains iTunes gapless info */
- if (itunes_gapless)
- {
- itunes_gapless = false;
- entry->lead_trim = get_itunes_int32(tag, 1);
- entry->tail_trim = get_itunes_int32(tag, 2);
- }
-#endif
-
- /* Note that parser functions sometimes set *ptag to NULL, so
- * the "!*ptag" check here doesn't always have the desired
- * effect. Should the parser functions (parsegenre in
- * particular) be updated to handle the case of being called
- * multiple times, or should the "*ptag" check be removed?
- */
- if (ptag && !*ptag)
- *ptag = tag;
-
-#ifdef HAVE_ALBUMART
- /* albumart */
- if ((!entry->has_embedded_albumart) &&
- ((tr->tag_length == 4 && !memcmp( header, "APIC", 4)) ||
- (tr->tag_length == 3 && !memcmp( header, "PIC" , 3))))
- {
- if (unsynch || (global_unsynch && version <= ID3_VER_2_3))
- entry->albumart.type = AA_TYPE_UNSYNC;
- else
- {
- entry->albumart.pos = lseek(fd, 0, SEEK_CUR) - framelen;
- entry->albumart.size = totframelen;
- entry->albumart.type = AA_TYPE_UNKNOWN;
- }
- }
-#endif
- if( tr->ppFunc )
- bufferpos = tr->ppFunc(entry, tag, bufferpos);
- break;
- }
- }
-
- if( i == TAGLIST_SIZE ) {
- /* no tag in tagList was found, or it was a repeat.
- skip it using the total size */
-
- if(global_unsynch && version <= ID3_VER_2_3) {
- size -= skip_unsynched(fd, totframelen);
- } else {
- size -= totframelen;
- if( lseek(fd, totframelen, SEEK_CUR) == -1 )
- return;
- }
- } else {
- /* Seek to the next frame */
- if(framelen < totframelen)
- lseek(fd, totframelen - framelen, SEEK_CUR);
- }
- }
-}
-
-/*
- * Calculates the size of the ID3v2 tag.
- *
- * Arguments: file - the file to search for a tag.
- *
- * Returns: the size of the tag or 0 if none was found
- */
-int getid3v2len(int fd)
-{
- char buf[6];
- int offset;
-
- /* Make sure file has a ID3 tag */
- if((-1 == lseek(fd, 0, SEEK_SET)) ||
- (read(fd, buf, 6) != 6) ||
- (strncmp(buf, "ID3", strlen("ID3")) != 0))
- offset = 0;
-
- /* Now check what the ID3v2 size field says */
- else
- if(read(fd, buf, 4) != 4)
- offset = 0;
- else
- offset = unsync(buf[0], buf[1], buf[2], buf[3]) + 10;
-
- logf("ID3V2 Length: 0x%x", offset);
- return offset;
-}
-
-#ifdef DEBUG_STANDALONE
-
-char *secs2str(int ms)
-{
- static char buffer[32];
- int secs = ms/1000;
- ms %= 1000;
- snprintf(buffer, sizeof(buffer), "%d:%02d.%d", secs/60, secs%60, ms/100);
- return buffer;
-}
-
-int main(int argc, char **argv)
-{
- int i;
- for(i=1; i<argc; i++) {
- struct mp3entry mp3;
- mp3.album = "Bogus";
- if(mp3info(&mp3, argv[i], false)) {
- printf("Failed to get %s\n", argv[i]);
- return 0;
- }
-
- printf("****** File: %s\n"
- " Title: %s\n"
- " Artist: %s\n"
- " Album: %s\n"
- " Genre: %s (%d) \n"
- " Composer: %s\n"
- " Year: %s (%d)\n"
- " Track: %s (%d)\n"
- " Length: %s / %d s\n"
- " Bitrate: %d\n"
- " Frequency: %d\n",
- argv[i],
- mp3.title?mp3.title:"<blank>",
- mp3.artist?mp3.artist:"<blank>",
- mp3.album?mp3.album:"<blank>",
- mp3.genre_string?mp3.genre_string:"<blank>",
- mp3.genre,
- mp3.composer?mp3.composer:"<blank>",
- mp3.year_string?mp3.year_string:"<blank>",
- mp3.year,
- mp3.track_string?mp3.track_string:"<blank>",
- mp3.tracknum,
- secs2str(mp3.length),
- mp3.length/1000,
- mp3.bitrate,
- mp3.frequency);
- }
-
- return 0;
-}
-
-#endif