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9e393393e0
mpd/src/tag.c
J. Alexander Treuman 9e393393e0 Cleanup getId3Info. 
git-svn-id: https://svn.musicpd.org/mpd/trunk@4281 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-06-21 20:24:43 +00:00

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/* the Music Player Daemon (MPD)
* (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu
* This project's homepage is: http://www.musicpd.org
*
* 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 program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tag.h"
#include "path.h"
#include "myfprintf.h"
#include "utils.h"
#include "utf8.h"
#include "log.h"
#include "inputStream.h"
#include "conf.h"
#include "charConv.h"
#include "tagTracker.h"
#include "mpd_types.h"
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#ifdef HAVE_OGGVORBIS
#include <vorbis/vorbisfile.h>
#endif
#ifdef HAVE_FLAC
#include <FLAC/file_decoder.h>
#include <FLAC/metadata.h>
#endif
#ifdef HAVE_ID3TAG
#define isId3v1(tag) (id3_tag_options(tag, 0, 0) & ID3_TAG_OPTION_ID3V1)
/* Size of the buffer to use for peeking at tag headers. We reuse this buffer
if the whole tag fits in it, so make it big to avoid a malloc(). */
#define ID3_TAG_BUFLEN 1024
#ifndef ID3_FRAME_COMPOSER
#define ID3_FRAME_COMPOSER "TCOM"
#endif
#ifndef ID3_FRAME_DISC
#define ID3_FRAME_DISC "TPOS"
#endif
#endif
char * mpdTagItemKeys[TAG_NUM_OF_ITEM_TYPES] =
{
"Artist",
"Album",
"Title",
"Track",
"Name",
"Genre",
"Date",
"Composer",
"Performer",
"Comment",
"Disc"
};
static mpd_sint8 ignoreTagItems[TAG_NUM_OF_ITEM_TYPES];
void initTagConfig() {
int quit = 0;
char * temp;
char * s;
char * c;
ConfigParam * param;
int i;
/* parse the "metadata_to_use" config parameter below */
memset(ignoreTagItems, 0, TAG_NUM_OF_ITEM_TYPES);
ignoreTagItems[TAG_ITEM_COMMENT] = 1; /* ignore comments by default */
param = getConfigParam(CONF_METADATA_TO_USE);
if(!param) return;
memset(ignoreTagItems, 1, TAG_NUM_OF_ITEM_TYPES);
if(0 == strcasecmp(param->value, "none")) return;
temp = c = s = strdup(param->value);
while(!quit) {
if(*s == ',' || *s == '\0') {
if(*s == '\0') quit = 1;
*s = '\0';
for(i = 0; i < TAG_NUM_OF_ITEM_TYPES; i++) {
if(strcasecmp(c, mpdTagItemKeys[i]) == 0) {
ignoreTagItems[i] = 0;
break;
}
}
if(strlen(c) && i == TAG_NUM_OF_ITEM_TYPES) {
ERROR("error parsing metadata item \"%s\" at "
"line %i\n", c, param->line);
exit(EXIT_FAILURE);
}
s++;
c = s;
}
s++;
}
free(temp);
}
void printMpdTag(FILE * fp, MpdTag * tag) {
int i;
if(tag->time>=0) myfprintf(fp,"Time: %i\n",tag->time);
for(i = 0; i < tag->numOfItems; i++) {
myfprintf(fp, "%s: %s\n", mpdTagItemKeys[tag->items[i].type],
tag->items[i].value);
}
}
#ifdef HAVE_ID3TAG
MpdTag * getID3Info(struct id3_tag * tag, char * id, int type, MpdTag * mpdTag)
{
struct id3_frame const * frame;
id3_ucs4_t const * ucs4;
id3_utf8_t * utf8;
union id3_field const * field;
unsigned int nstrings;
int i;
frame = id3_tag_findframe(tag, id, 0);
if(!frame || frame->nfields < 2) return mpdTag;
field = &frame->fields[1];
nstrings = id3_field_getnstrings(field);
for(i = 0; i < nstrings; i++) {
ucs4 = id3_field_getstrings(field, i);
if(!ucs4) continue;
if(type == TAG_ITEM_GENRE) ucs4 = id3_genre_name(ucs4);
utf8 = id3_ucs4_utf8duplicate(ucs4);
if(!utf8) continue;
if(mpdTag == NULL) mpdTag = newMpdTag();
addItemToMpdTag(mpdTag, type, utf8);
free(utf8);
}
return mpdTag;
}
#endif
#ifdef HAVE_ID3TAG
MpdTag * parseId3Tag(struct id3_tag * tag) {
MpdTag * ret = NULL;
ret = getID3Info(tag, ID3_FRAME_ARTIST, TAG_ITEM_ARTIST, ret);
ret = getID3Info(tag, ID3_FRAME_TITLE, TAG_ITEM_TITLE, ret);
ret = getID3Info(tag, ID3_FRAME_ALBUM, TAG_ITEM_ALBUM, ret);
ret = getID3Info(tag, ID3_FRAME_TRACK, TAG_ITEM_TRACK, ret);
ret = getID3Info(tag, ID3_FRAME_YEAR, TAG_ITEM_DATE, ret);
ret = getID3Info(tag, ID3_FRAME_GENRE, TAG_ITEM_GENRE, ret);
ret = getID3Info(tag, ID3_FRAME_COMPOSER, TAG_ITEM_COMPOSER, ret);
ret = getID3Info(tag, ID3_FRAME_COMMENT, TAG_ITEM_COMMENT, ret);
ret = getID3Info(tag, ID3_FRAME_DISC, TAG_ITEM_DISC, ret);
return ret;
}
#endif
#ifdef HAVE_ID3TAG
static int fillBuffer(void *buf, size_t size, FILE *stream,
long offset, int whence)
{
if (fseek(stream, offset, whence) != 0) return 0;
return fread(buf, 1, size, stream);
}
#endif
#ifdef HAVE_ID3TAG
static int getId3v2FooterSize(FILE * stream, long offset, int whence)
{
id3_byte_t buf[ID3_TAG_QUERYSIZE];
int bufsize;
bufsize = fillBuffer(buf, ID3_TAG_QUERYSIZE, stream, offset, whence);
if (bufsize <= 0) return 0;
return id3_tag_query(buf, bufsize);
}
#endif
#ifdef HAVE_ID3TAG
static struct id3_tag * getId3Tag(FILE * stream, long offset, int whence)
{
struct id3_tag * tag;
id3_byte_t * buf[ID3_TAG_BUFLEN];
id3_byte_t * mbuf;
int tagsize;
int bufsize;
int mbufsize;
/* It's ok if we get less than we asked for */
bufsize = fillBuffer(buf, ID3_TAG_BUFLEN, stream, offset, whence);
if (bufsize <= 0) return NULL;
/* Look for a tag header */
tagsize = id3_tag_query((const id3_byte_t *)buf, bufsize);
if (tagsize <= 0) return NULL;
if (tagsize <= bufsize) {
/* Got an id3 tag, and it fits in buf */
tag = id3_tag_parse((const id3_byte_t *)buf, tagsize);
} else {
/* Got an id3tag that overflows buf, so get a new one */
mbuf = malloc(tagsize);
if (!mbuf) return NULL;
mbufsize = fillBuffer(mbuf, tagsize, stream, offset, whence);
if (mbufsize < tagsize) {
free(mbuf);
return NULL;
}
tag = id3_tag_parse((const id3_byte_t *)mbuf, tagsize);
free(mbuf);
}
return tag;
}
#endif
#ifdef HAVE_ID3TAG
static struct id3_tag * findId3TagFromBeginning(FILE * stream)
{
struct id3_tag * tag;
struct id3_tag * seektag;
struct id3_frame * frame;
int seek;
tag = getId3Tag(stream, 0, SEEK_SET);
if (!tag) {
return NULL;
} else if (isId3v1(tag)) {
/* id3v1 tags don't belong here */
id3_tag_delete(tag);
return NULL;
}
/* We have an id3v2 tag, so let's look for SEEK frames */
while ((frame = id3_tag_findframe(tag, "SEEK", 0))) {
/* Found a SEEK frame, get it's value */
seek = id3_field_getint(id3_frame_field(frame, 0));
if (seek < 0) break;
/* Get the tag specified by the SEEK frame */
seektag = getId3Tag(stream, seek, SEEK_CUR);
if (!seektag || isId3v1(seektag)) break;
/* Replace the old tag with the new one */
id3_tag_delete(tag);
tag = seektag;
}
return tag;
}
#endif
#ifdef HAVE_ID3TAG
static struct id3_tag * findId3TagFromEnd(FILE * stream)
{
struct id3_tag * tag;
struct id3_tag * v1tag;
int tagsize;
/* Get an id3v1 tag from the end of file for later use */
v1tag = getId3Tag(stream, -128, SEEK_END);
/* Get the id3v2 tag size from the footer (located before v1tag) */
tagsize = getId3v2FooterSize(stream, (v1tag ? -128 : 0) - 10, SEEK_END);
if (tagsize >= 0) return v1tag;
/* Get the tag which the footer belongs to */
tag = getId3Tag(stream, tagsize, SEEK_CUR);
if (!tag) return v1tag;
/* We have an id3v2 tag, so ditch v1tag */
id3_tag_delete(v1tag);
return tag;
}
#endif
MpdTag * id3Dup(char * file) {
MpdTag * ret = NULL;
#ifdef HAVE_ID3TAG
struct id3_tag * tag;
FILE * stream;
stream = fopen(file, "r");
if (!stream) {
DEBUG("id3Dup: Failed to open file: '%s', %s\n",file, strerror(errno));
return NULL;
}
tag = findId3TagFromBeginning(stream);
if (!tag) tag = findId3TagFromEnd(stream);
fclose(stream);
if (!tag) return NULL;
ret = parseId3Tag(tag);
id3_tag_delete(tag);
#endif
return ret;
}
MpdTag * apeDup(char * file) {
MpdTag * ret = NULL;
FILE * fp = NULL;
int tagCount;
unsigned char * buffer = NULL;
unsigned char * p;
int tagLen;
int size;
unsigned long flags;
int i;
unsigned char * key;
struct {
unsigned char id[8];
unsigned char version[4];
unsigned char length[4];
unsigned char tagCount[4];
unsigned char flags[4];
unsigned char reserved[8];
} footer;
char * apeItems[7] =
{
"title",
"artist",
"album",
"comment",
"genre",
"track",
"year"
};
int tagItems[7] =
{
TAG_ITEM_TITLE,
TAG_ITEM_ARTIST,
TAG_ITEM_ALBUM,
TAG_ITEM_COMMENT,
TAG_ITEM_GENRE,
TAG_ITEM_TRACK,
TAG_ITEM_DATE,
};
fp = fopen(file, "r");
if(!fp) return NULL;
/* determine if file has an apeV2 tag */
if(fseek(fp, 0, SEEK_END)) goto fail;
size = ftell(fp);
if(fseek(fp, size-sizeof(footer), SEEK_SET)) goto fail;
if(fread(&footer, 1, sizeof(footer), fp) != sizeof(footer)) goto fail;
if(memcmp(footer.id, "APETAGEX", sizeof(footer.id)) != 0) goto fail;
if(readLEuint32(footer.version) != 2000) goto fail;
/* find begining of ape tag */
tagLen = readLEuint32(footer.length);
if(tagLen < sizeof(footer)) goto fail;
if(fseek(fp, size-tagLen, SEEK_SET)) goto fail;
/* read tag into buffer */
tagLen -= sizeof(footer);
buffer = malloc(tagLen);
if(fread(buffer, 1, tagLen, fp) != tagLen) goto fail;
/* read tags */
tagCount = readLEuint32(footer.tagCount);
p = buffer;
while(tagCount-- && tagLen > 10) {
size = readLEuint32(p);
p += 4;
tagLen -= 4;
flags = readLEuint32(p);
p += 4;
tagLen -= 4;
/* get the key */
key = p;
while(tagLen-size > 0 && *p != '\0') {
p++;
tagLen--;
}
p++;
tagLen--;
/* get the value */
if(tagLen-size < 0) goto fail;
/* we only care about utf-8 text tags */
if(!(flags & (0x3 << 1))) {
for(i = 0; i < 7; i++) {
if(strcasecmp(key, apeItems[i]) == 0) {
if(!ret) ret = newMpdTag();
addItemToMpdTagWithLen(
ret, tagItems[i], p, size);
}
}
}
p += size;
tagLen -= size;
}
fail:
if(fp) fclose(fp);
if(buffer) free(buffer);
return ret;
}
MpdTag * newMpdTag() {
MpdTag * ret = malloc(sizeof(MpdTag));
ret->items = NULL;
ret->time = -1;
ret->numOfItems = 0;
return ret;
}
static void deleteItem(MpdTag * tag, int index) {
tag->numOfItems--;
assert(index < tag->numOfItems);
removeTagItemString(tag->items[index].type, tag->items[index].value);
/* free(tag->items[index].value); */
if(tag->numOfItems-index > 0) {
memmove(tag->items+index, tag->items+index+1,
tag->numOfItems-index);
}
if(tag->numOfItems > 0) {
tag->items = realloc(tag->items,
tag->numOfItems*sizeof(MpdTagItem));
}
else {
free(tag->items);
tag->items = NULL;
}
}
void clearItemsFromMpdTag(MpdTag * tag, int type) {
int i = 0;
for(i = 0; i < tag->numOfItems; i++) {
if(tag->items[i].type == type) {
deleteItem(tag, i);
/* decrement since when just deleted this node */
i--;
}
}
}
void clearMpdTag(MpdTag * tag) {
int i;
for(i = 0; i < tag->numOfItems; i++) {
removeTagItemString(tag->items[i].type, tag->items[i].value);
/* free(tag->items[i].value); */
}
if(tag->items) free(tag->items);
tag->items = NULL;
tag->numOfItems = 0;
tag->time = -1;
}
void freeMpdTag(MpdTag * tag) {
clearMpdTag(tag);
free(tag);
}
MpdTag * mpdTagDup(MpdTag * tag) {
MpdTag * ret = NULL;
int i;
if(!tag) return NULL;
ret = newMpdTag();
ret->time = tag->time;
for(i = 0; i < tag->numOfItems; i++) {
addItemToMpdTag(ret, tag->items[i].type, tag->items[i].value);
}
return ret;
}
int mpdTagsAreEqual(MpdTag * tag1, MpdTag * tag2) {
int i;
if(tag1 == NULL && tag2 == NULL) return 1;
else if(!tag1 || !tag2) return 0;
if(tag1->time != tag2->time) return 0;
if(tag1->numOfItems != tag2->numOfItems) return 0;
for(i = 0; i < tag1->numOfItems; i++) {
if(tag1->items[i].type != tag2->items[i].type) return 0;
if(strcmp(tag1->items[i].value, tag2->items[i].value)) {
return 0;
}
}
return 1;
}
#define fixUtf8(str) { \
if(str && !validUtf8String(str)) { \
char * temp; \
DEBUG("not valid utf8 in tag: %s\n",str); \
temp = latin1StrToUtf8Dup(str); \
free(str); \
str = temp; \
} \
}
inline static void appendToTagItems(MpdTag * tag, int type, char * value,
int len)
{
int i = tag->numOfItems;
char * dup;
dup = malloc(len+1);
strncpy(dup, value, len);
dup[len] = '\0';
fixUtf8(dup);
stripReturnChar(dup);
tag->numOfItems++;
tag->items = realloc(tag->items, tag->numOfItems*sizeof(MpdTagItem));
tag->items[i].type = type;
tag->items[i].value = getTagItemString(type, dup);
free(dup);
}
void addItemToMpdTagWithLen(MpdTag * tag, int itemType, char * value, int len) {
if(ignoreTagItems[itemType]) return;
if(!value || !len) return;
/* we can't hold more than 255 items */
if(tag->numOfItems == 255) return;
appendToTagItems(tag, itemType, value, len);
}
char * getNextItemFromMpdTag(MpdTag * tag, int itemType, int * last) {
int i = 0;
if(last && *last >=0) i = *last+1;
for(i = 0; i < tag->numOfItems; i++) {
if(itemType == tag->items[i].type) {
if(last) *last = i;
return tag->items[i].value;
}
i++;
}
return NULL;
}
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