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owntone-server/src/mp3-scanner.c
Ron Pedde 537233256b Default browse/query
2004-09-18 04:12:43 +00:00

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/*
* $Id$
* Implementation file for mp3 scanner and monitor
*
* Ironically, this now scans file types other than mp3 files,
* but the name is the same for historical purposes, not to mention
* the fact that sf.net makes it virtually impossible to manage a cvs
* root reasonably. Perhaps one day soon they will move to subversion.
*
* /me crosses his fingers
*
* Copyright (C) 2003 Ron Pedde (ron@pedde.com)
*
* 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
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#define _POSIX_PTHREAD_SEMANTICS
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <id3tag.h>
#include <limits.h>
#include <restart.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h> /* htons and friends */
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h> /* why here? For osx 10.2, of course! */
#include "daapd.h"
#include "db-memory.h"
#include "err.h"
#include "mp3-scanner.h"
#include "playlist.h"
#ifndef HAVE_STRCASESTR
# include "strcasestr.h"
#endif
/*
* Typedefs
*/
#pragma pack(1)
typedef struct tag_scan_id3header {
unsigned char id[3];
unsigned char version[2];
unsigned char flags;
unsigned char size[4];
} SCAN_ID3HEADER;
#pragma pack(0)
#define MAYBEFREE(a) { if((a)) free((a)); };
/*
* Globals
*/
int scan_br_table[5][16] = {
{ 0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,0 }, /* MPEG1, Layer 1 */
{ 0,32,48,56,64,80,96,112,128,160,192,224,256,320,384,0 }, /* MPEG1, Layer 2 */
{ 0,32,40,48,56,64,80,96,112,128,160,192,224,256,320,0 }, /* MPEG1, Layer 3 */
{ 0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,0 }, /* MPEG2/2.5, Layer 1 */
{ 0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,0 } /* MPEG2/2.5, Layer 2/3 */
};
int scan_sample_table[3][4] = {
{ 44100, 48000, 32000, 0 }, /* MPEG 1 */
{ 22050, 24000, 16000, 0 }, /* MPEG 2 */
{ 11025, 12000, 8000, 0 } /* MPEG 2.5 */
};
int scan_mode_foreground=1;
char *scan_winamp_genre[] = {
"Blues", // 0
"Classic Rock",
"Country",
"Dance",
"Disco",
"Funk", // 5
"Grunge",
"Hip-Hop",
"Jazz",
"Metal",
"New Age", // 10
"Oldies",
"Other",
"Pop",
"R&B",
"Rap", // 15
"Reggae",
"Rock",
"Techno",
"Industrial",
"Alternative", // 20
"Ska",
"Death Metal",
"Pranks",
"Soundtrack",
"Euro-Techno", // 25
"Ambient",
"Trip-Hop",
"Vocal",
"Jazz+Funk",
"Fusion", // 30
"Trance",
"Classical",
"Instrumental",
"Acid",
"House", // 35
"Game",
"Sound Clip",
"Gospel",
"Noise",
"AlternRock", // 40
"Bass",
"Soul",
"Punk",
"Space",
"Meditative", // 45
"Instrumental Pop",
"Instrumental Rock",
"Ethnic",
"Gothic",
"Darkwave", // 50
"Techno-Industrial",
"Electronic",
"Pop-Folk",
"Eurodance",
"Dream", // 55
"Southern Rock",
"Comedy",
"Cult",
"Gangsta",
"Top 40", // 60
"Christian Rap",
"Pop/Funk",
"Jungle",
"Native American",
"Cabaret", // 65
"New Wave",
"Psychadelic",
"Rave",
"Showtunes",
"Trailer", // 70
"Lo-Fi",
"Tribal",
"Acid Punk",
"Acid Jazz",
"Polka", // 75
"Retro",
"Musical",
"Rock & Roll",
"Hard Rock",
"Folk", // 80
"Folk/Rock",
"National folk",
"Swing",
"Fast-fusion",
"Bebob", // 85
"Latin",
"Revival",
"Celtic",
"Bluegrass",
"Avantgarde", // 90
"Gothic Rock",
"Progressive Rock",
"Psychedelic Rock",
"Symphonic Rock",
"Slow Rock", // 95
"Big Band",
"Chorus",
"Easy Listening",
"Acoustic",
"Humour", // 100
"Speech",
"Chanson",
"Opera",
"Chamber Music",
"Sonata", // 105
"Symphony",
"Booty Bass",
"Primus",
"Porn Groove",
"Satire", // 110
"Slow Jam",
"Club",
"Tango",
"Samba",
"Folklore", // 115
"Ballad",
"Powder Ballad",
"Rhythmic Soul",
"Freestyle",
"Duet", // 120
"Punk Rock",
"Drum Solo",
"A Capella",
"Euro-House",
"Dance Hall", // 125
"Goa",
"Drum & Bass",
"Club House",
"Hardcore",
"Terror", // 130
"Indie",
"BritPop",
"NegerPunk",
"Polsk Punk",
"Beat", // 135
"Christian Gangsta",
"Heavy Metal",
"Black Metal",
"Crossover",
"Contemporary C", // 140
"Christian Rock",
"Merengue",
"Salsa",
"Thrash Metal",
"Anime", // 145
"JPop",
"SynthPop",
"Unknown"
};
#define WINAMP_GENRE_UNKNOWN 148
/*
* Forwards
*/
int scan_path(char *path);
int scan_gettags(char *file, MP3FILE *pmp3);
int scan_get_mp3tags(char *file, MP3FILE *pmp3);
int scan_get_aactags(char *file, MP3FILE *pmp3);
int scan_get_fileinfo(char *file, MP3FILE *pmp3);
int scan_get_mp3fileinfo(char *file, MP3FILE *pmp3);
int scan_get_aacfileinfo(char *file, MP3FILE *pmp3);
int scan_freetags(MP3FILE *pmp3);
void scan_static_playlist(char *path, struct dirent *pde, struct stat *psb);
void scan_music_file(char *path, struct dirent *pde, struct stat *psb);
void make_composite_tags(MP3FILE *pmp3);
typedef struct {
char* suffix;
int (*tags)(char* file, MP3FILE* pmp3);
int (*files)(char* file, MP3FILE* pmp3);
} taghandler;
static taghandler taghandlers[] = {
{ "aac", scan_get_aactags, scan_get_aacfileinfo },
{ "mp4", scan_get_aactags, scan_get_aacfileinfo },
{ "m4a", scan_get_aactags, scan_get_aacfileinfo },
{ "m4p", scan_get_aactags, scan_get_aacfileinfo },
{ "mp3", scan_get_mp3tags, scan_get_mp3fileinfo },
{ NULL, 0 }
};
/*
* scan_init
*
* This assumes the database is already initialized.
*
* Ideally, this would check to see if the database is empty.
* If it is, it sets the database into bulk-import mode, and scans
* the MP3 directory.
*
* If not empty, it would start a background monitor thread
* and update files on a file-by-file basis
*/
int scan_init(char *path) {
int err;
scan_mode_foreground=0;
if(db_is_empty()) {
scan_mode_foreground=1;
}
if(db_start_initial_update())
return -1;
DPRINTF(ERR_DEBUG,"%s scanning for MP3s in %s\n",
scan_mode_foreground ? "Foreground" : "Background",
path);
err=scan_path(path);
if(db_end_initial_update())
return -1;
scan_mode_foreground=0;
return err;
}
/*
* scan_path
*
* Do a brute force scan of a path, finding all the MP3 files there
*/
int scan_path(char *path) {
DIR *current_dir;
char de[sizeof(struct dirent) + MAXNAMLEN + 1]; /* overcommit for solaris */
struct dirent *pde;
int err;
char mp3_path[PATH_MAX];
struct stat sb;
int modified_time;
if((current_dir=opendir(path)) == NULL) {
return -1;
}
while(1) {
if(config.stop) {
DPRINTF(ERR_WARN,"Stop detected. Aborting scan of %s.\n",path);
return 0;
}
pde=(struct dirent *)&de;
err=readdir_r(current_dir,(struct dirent *)de,&pde);
if(err == -1) {
DPRINTF(ERR_DEBUG,"Error on readdir_r: %s\n",strerror(errno));
err=errno;
closedir(current_dir);
errno=err;
return -1;
}
if(!pde)
break;
if(pde->d_name[0] == '.') /* skip hidden and directories */
continue;
snprintf(mp3_path,PATH_MAX,"%s/%s",path,pde->d_name);
DPRINTF(ERR_DEBUG,"Found %s\n",mp3_path);
if(stat(mp3_path,&sb)) {
DPRINTF(ERR_WARN,"Error statting: %s\n",strerror(errno));
} else {
if(sb.st_mode & S_IFDIR) { /* dir -- recurse */
DPRINTF(ERR_DEBUG,"Found dir %s... recursing\n",pde->d_name);
scan_path(mp3_path);
} else {
/* process the file */
if(strlen(pde->d_name) > 4) {
if(strcasecmp(".m3u",(char*)&pde->d_name[strlen(pde->d_name) - 4]) == 0) {
/* we found an m3u file */
scan_static_playlist(path, pde, &sb);
} else if (strcasestr(config.extensions,
(char*)&pde->d_name[strlen(pde->d_name) - 4])) {
/* only scan if it's been changed, or empty db */
modified_time=sb.st_mtime;
if((scan_mode_foreground) ||
!db_exists(sb.st_ino) ||
db_last_modified(sb.st_ino) < modified_time) {
scan_music_file(path,pde,&sb);
} else {
DPRINTF(ERR_DEBUG,"Skipping file... not modified\n");
}
}
}
}
}
}
closedir(current_dir);
return 0;
}
/*
* scan_static_playlist
*
* Scan a file as a static playlist
*/
void scan_static_playlist(char *path, struct dirent *pde, struct stat *psb) {
char playlist_path[PATH_MAX];
char m3u_path[PATH_MAX];
char linebuffer[PATH_MAX];
int fd;
int playlistid;
struct stat sb;
DPRINTF(ERR_WARN,"Processing static playlist: %s\n",pde->d_name);
strcpy(m3u_path,pde->d_name);
snprintf(playlist_path,sizeof(playlist_path),"%s/%s",path,pde->d_name);
m3u_path[strlen(pde->d_name) - 4] = '\0';
playlistid=psb->st_ino;
fd=open(playlist_path,O_RDONLY);
if(fd != -1) {
db_add_playlist(playlistid,m3u_path,0);
DPRINTF(ERR_INFO,"Added playlist as id %d\n",playlistid);
memset(linebuffer,0x00,sizeof(linebuffer));
while(readline(fd,linebuffer,sizeof(linebuffer)) > 0) {
while((linebuffer[strlen(linebuffer)-1] == '\n') ||
(linebuffer[strlen(linebuffer)-1] == '\r')) /* windows? */
linebuffer[strlen(linebuffer)-1] = '\0';
if((linebuffer[0] == ';') || (linebuffer[0] == '#'))
continue;
/* FIXME - should chomp trailing comments */
/* otherwise, assume it is a path */
if(linebuffer[0] == '/') {
strcpy(m3u_path,linebuffer);
} else {
snprintf(m3u_path,sizeof(m3u_path),"%s/%s",path,linebuffer);
}
DPRINTF(ERR_DEBUG,"Checking %s\n",m3u_path);
/* might be valid, might not... */
if(!stat(m3u_path,&sb)) {
/* FIXME: check to see if valid inode! */
db_add_playlist_song(playlistid,sb.st_ino);
} else {
DPRINTF(ERR_WARN,"Playlist entry %s bad: %s\n",
m3u_path,strerror(errno));
}
}
close(fd);
}
DPRINTF(ERR_WARN,"Done processing playlist\n");
}
/*
* scan_music_file
*
* scan a particular file as a music file
*/
void scan_music_file(char *path, struct dirent *pde, struct stat *psb) {
MP3FILE mp3file;
char mp3_path[PATH_MAX];
snprintf(mp3_path,sizeof(mp3_path),"%s/%s",path,pde->d_name);
/* we found an mp3 file */
DPRINTF(ERR_INFO,"Found music file: %s\n",pde->d_name);
memset((void*)&mp3file,0,sizeof(mp3file));
mp3file.path=mp3_path;
mp3file.fname=pde->d_name;
if(strlen(pde->d_name) > 4)
mp3file.type=strdup(strrchr(pde->d_name, '.') + 1);
/* FIXME; assumes that st_ino is a u_int_32
DWB: also assumes that the library is contained entirely within
one file system
REP: true, although linux doesn't even guarantee a unique inode
within a single device!
*/
mp3file.id=psb->st_ino;
/* Do the tag lookup here */
if(!scan_gettags(mp3file.path,&mp3file) &&
!scan_get_fileinfo(mp3file.path,&mp3file)) {
make_composite_tags(&mp3file);
/* fill in the time_added. I'm not sure of the logic in this.
My thinking is to use time created, but what is that? Best
guess would be earliest of st_mtime and st_ctime...
*/
mp3file.time_added=psb->st_mtime;
if(psb->st_ctime < mp3file.time_added)
mp3file.time_added=psb->st_ctime;
DPRINTF(ERR_DEBUG," Date Added: %d\n",mp3file.time_added);
db_add(&mp3file);
pl_eval(&mp3file); /* FIXME: move to db_add? */
} else {
DPRINTF(ERR_WARN,"Skipping %s - scan_gettags failed\n",pde->d_name);
}
scan_freetags(&mp3file);
}
/*
* scan_aac_findatom
*
* Find an AAC atom
*/
long scan_aac_findatom(FILE *fin, long max_offset, char *which_atom, int *atom_size) {
long current_offset=0;
int size;
char atom[4];
while(current_offset < max_offset) {
if(fread((void*)&size,1,sizeof(int),fin) != sizeof(int))
return -1;
size=ntohl(size);
if(size <= 7) /* something not right */
return -1;
if(fread(atom,1,4,fin) != 4)
return -1;
if(strncasecmp(atom,which_atom,4) == 0) {
*atom_size=size;
return current_offset;
}
fseek(fin,size-8,SEEK_CUR);
current_offset+=size;
}
return -1;
}
/*
* scan_get_aactags
*
* Get tags from an AAC (m4a) file
*/
int scan_get_aactags(char *file, MP3FILE *pmp3) {
FILE *fin;
long atom_offset;
int atom_length;
long file_size;
long current_offset=0;
int current_size;
char current_atom[4];
char *current_data;
unsigned short us_data;
int genre;
int len;
if(!(fin=fopen(file,"rb"))) {
DPRINTF(ERR_INFO,"Cannot open file %s for reading\n",file);
return -1;
}
fseek(fin,0,SEEK_END);
file_size=ftell(fin);
fseek(fin,0,SEEK_SET);
atom_offset=scan_aac_findatom(fin,file_size,"moov",&atom_length);
if(atom_offset != -1) {
atom_offset=scan_aac_findatom(fin,atom_length - 8,"udta",&atom_length);
if(atom_offset != -1) {
atom_offset=scan_aac_findatom(fin,atom_length - 8, "meta", &atom_length);
if(atom_offset != -1) {
fseek(fin,4,SEEK_CUR); /* ???? */
atom_offset=scan_aac_findatom(fin, atom_length - 8, "ilst", &atom_length);
if(atom_offset != -1) {
/* found the tag section - need to walk through now */
while(current_offset < atom_length) {
if(fread((void*)&current_size,1,sizeof(int),fin) != sizeof(int))
break;
current_size=ntohl(current_size);
if(current_size <= 7) /* something not right */
break;
if(fread(current_atom,1,4,fin) != 4)
break;
len=current_size-7; /* for ill-formed too-short tags */
if(len < 22)
len=22;
current_data=(char*)malloc(len); /* extra byte */
memset(current_data,0x00,len);
if(fread(current_data,1,current_size-8,fin) != current_size-8)
break;
if(!memcmp(current_atom,"\xA9" "nam",4)) { /* Song name */
pmp3->title=strdup((char*)&current_data[16]);
} else if(!memcmp(current_atom,"\xA9" "ART",4)) {
pmp3->artist=strdup((char*)&current_data[16]);
} else if(!memcmp(current_atom,"\xA9" "alb",4)) {
pmp3->album=strdup((char*)&current_data[16]);
} else if(!memcmp(current_atom,"\xA9" "cmt",4)) {
pmp3->comment=strdup((char*)&current_data[16]);
} else if(!memcmp(current_atom,"\xA9" "wrt",4)) {
pmp3->composer=strdup((char*)&current_data[16]);
} else if(!memcmp(current_atom,"\xA9" "grp",4)) {
pmp3->grouping=strdup((char*)&current_data[16]);
} else if(!memcmp(current_atom,"\xA9" "gen",4)) {
/* can this be a winamp genre??? */
pmp3->genre=strdup((char*)&current_data[16]);
} else if(!memcmp(current_atom,"tmpo",4)) {
us_data=*((unsigned short *)&current_data[16]);
us_data=ntohs(us_data);
pmp3->bpm=us_data;
} else if(!memcmp(current_atom,"trkn",4)) {
us_data=*((unsigned short *)&current_data[18]);
us_data=ntohs(us_data);
pmp3->track=us_data;
us_data=*((unsigned short *)&current_data[20]);
us_data=ntohs(us_data);
pmp3->total_tracks=us_data;
} else if(!memcmp(current_atom,"disk",4)) {
us_data=*((unsigned short *)&current_data[18]);
us_data=ntohs(us_data);
pmp3->disc=us_data;
us_data=*((unsigned short *)&current_data[20]);
us_data=ntohs(us_data);
pmp3->total_discs=us_data;
} else if(!memcmp(current_atom,"\xA9" "day",4)) {
pmp3->year=atoi((char*)&current_data[16]);
} else if(!memcmp(current_atom,"gnre",4)) {
genre=(int)(*((char*)&current_data[17]));
genre--;
if((genre < 0) || (genre > WINAMP_GENRE_UNKNOWN))
genre=WINAMP_GENRE_UNKNOWN;
pmp3->genre=strdup(scan_winamp_genre[genre]);
}
free(current_data);
current_offset+=current_size;
}
}
}
}
}
fclose(fin);
return 0; /* we'll return as much as we got. */
}
/*
* scan_gettags
*
* Scan an mp3 file for id3 tags using libid3tag
*/
int scan_gettags(char *file, MP3FILE *pmp3) {
taghandler *hdl;
/* dispatch to appropriate tag handler */
for(hdl = taghandlers ; hdl->suffix ; ++hdl)
if(!strcmp(hdl->suffix, pmp3->type))
break;
if(hdl->tags)
return hdl->tags(file, pmp3);
/* maybe this is an extension that we've manually
* specified in the config file, but don't know how
* to extract tags from. Ogg, maybe.
*/
return 0;
}
int scan_get_mp3tags(char *file, MP3FILE *pmp3) {
struct id3_file *pid3file;
struct id3_tag *pid3tag;
struct id3_frame *pid3frame;
int err;
int index;
int used;
unsigned char *utf8_text;
int genre=WINAMP_GENRE_UNKNOWN;
int have_utf8;
int have_text;
id3_ucs4_t const *native_text;
char *tmp;
int got_numeric_genre;
if(strcasecmp(pmp3->type,"mp3")) /* can't get tags for non-mp3 */
return 0;
pid3file=id3_file_open(file,ID3_FILE_MODE_READONLY);
if(!pid3file) {
DPRINTF(ERR_WARN,"Cannot open %s\n",file);
return -1;
}
pid3tag=id3_file_tag(pid3file);
if(!pid3tag) {
err=errno;
id3_file_close(pid3file);
errno=err;
DPRINTF(ERR_WARN,"Cannot get ID3 tag for %s\n",file);
return -1;
}
index=0;
while((pid3frame=id3_tag_findframe(pid3tag,"",index))) {
used=0;
utf8_text=NULL;
native_text=NULL;
have_utf8=0;
have_text=0;
if(((pid3frame->id[0] == 'T')||(strcmp(pid3frame->id,"COMM")==0)) &&
(id3_field_getnstrings(&pid3frame->fields[1])))
have_text=1;
if(have_text) {
native_text=id3_field_getstrings(&pid3frame->fields[1],0);
if(native_text) {
have_utf8=1;
utf8_text=id3_ucs4_utf8duplicate(native_text);
MEMNOTIFY(utf8_text);
if(!strcmp(pid3frame->id,"TIT2")) { /* Title */
used=1;
pmp3->title = utf8_text;
DPRINTF(ERR_DEBUG," Title: %s\n",utf8_text);
} else if(!strcmp(pid3frame->id,"TPE1")) {
used=1;
pmp3->artist = utf8_text;
DPRINTF(ERR_DEBUG," Artist: %s\n",utf8_text);
} else if(!strcmp(pid3frame->id,"TALB")) {
used=1;
pmp3->album = utf8_text;
DPRINTF(ERR_DEBUG," Album: %s\n",utf8_text);
} else if(!strcmp(pid3frame->id,"TCOM")) {
used=1;
pmp3->composer = utf8_text;
DPRINTF(ERR_DEBUG," Composer: %s\n",utf8_text);
} else if(!strcmp(pid3frame->id,"TIT1")) {
used=1;
pmp3->grouping = utf8_text;
DPRINTF(ERR_DEBUG," Grouping: %s\n",utf8_text);
} else if(!strcmp(pid3frame->id,"TPE2")) {
used=1;
pmp3->orchestra = utf8_text;
DPRINTF(ERR_DEBUG," Orchestra: %s\n",utf8_text);
} else if(!strcmp(pid3frame->id,"TPE3")) {
used=1;
pmp3->conductor = utf8_text;
DPRINTF(ERR_DEBUG," Conductor: %s\n",utf8_text);
} else if(!strcmp(pid3frame->id,"TCON")) {
used=1;
pmp3->genre = utf8_text;
got_numeric_genre=0;
DPRINTF(ERR_DEBUG," Genre: %s\n",utf8_text);
if(pmp3->genre) {
if(!strlen(pmp3->genre)) {
genre=WINAMP_GENRE_UNKNOWN;
got_numeric_genre=1;
} else if (isdigit(pmp3->genre[0])) {
genre=atoi(pmp3->genre);
got_numeric_genre=1;
} else if ((pmp3->genre[0] == '(') && (isdigit(pmp3->genre[1]))) {
genre=atoi((char*)&pmp3->genre[1]);
got_numeric_genre=1;
}
if(got_numeric_genre) {
if((genre < 0) || (genre > WINAMP_GENRE_UNKNOWN))
genre=WINAMP_GENRE_UNKNOWN;
free(pmp3->genre);
pmp3->genre=strdup(scan_winamp_genre[genre]);
}
}
} else if(!strcmp(pid3frame->id,"COMM")) {
used=1;
pmp3->comment = utf8_text;
DPRINTF(ERR_DEBUG," Comment: %s\n",pmp3->comment);
} else if(!strcmp(pid3frame->id,"TPOS")) {
tmp=(char*)utf8_text;
strsep(&tmp,"/");
if(tmp) {
pmp3->total_discs=atoi(tmp);
}
pmp3->disc=atoi((char*)utf8_text);
DPRINTF(ERR_DEBUG," Disc %d of %d\n",pmp3->disc,pmp3->total_discs);
} else if(!strcmp(pid3frame->id,"TRCK")) {
tmp=(char*)utf8_text;
strsep(&tmp,"/");
if(tmp) {
pmp3->total_tracks=atoi(tmp);
}
pmp3->track=atoi((char*)utf8_text);
DPRINTF(ERR_DEBUG," Track %d of %d\n",pmp3->track,pmp3->total_tracks);
} else if(!strcmp(pid3frame->id,"TDRC")) {
pmp3->year = atoi(utf8_text);
DPRINTF(ERR_DEBUG," Year: %d\n",pmp3->year);
} else if(!strcmp(pid3frame->id,"TLEN")) {
pmp3->song_length = atoi(utf8_text) / 1000;
DPRINTF(ERR_DEBUG, " Length: %d\n", pmp3->song_length);
} else if(!strcmp(pid3frame->id,"TBPM")) {
pmp3->bpm = atoi(utf8_text);
DPRINTF(ERR_DEBUG, "BPM: %d\n", pmp3->bpm);
}
}
}
/* can check for non-text tags here */
if((!used) && (have_utf8) && (utf8_text))
free(utf8_text);
index++;
}
id3_file_close(pid3file);
DPRINTF(ERR_DEBUG,"Got id3 tag successfully\n");
return 0;
}
/*
* scan_freetags
*
* Free up the tags that were dynamically allocated
*/
int scan_freetags(MP3FILE *pmp3) {
MAYBEFREE(pmp3->title);
MAYBEFREE(pmp3->artist);
MAYBEFREE(pmp3->album);
MAYBEFREE(pmp3->genre);
MAYBEFREE(pmp3->comment);
MAYBEFREE(pmp3->type);
MAYBEFREE(pmp3->composer);
MAYBEFREE(pmp3->orchestra);
MAYBEFREE(pmp3->conductor);
MAYBEFREE(pmp3->grouping);
MAYBEFREE(pmp3->description);
return 0;
}
/*
* scan_get_fileinfo
*
* Dispatch to actual file info handlers
*/
int scan_get_fileinfo(char *file, MP3FILE *pmp3) {
FILE *infile;
off_t file_size;
taghandler *hdl;
/* dispatch to appropriate tag handler */
for(hdl = taghandlers ; hdl->suffix ; ++hdl)
if(!strcmp(hdl->suffix, pmp3->type))
break;
if(hdl->files)
return hdl->files(file, pmp3);
/* a file we don't know anything about... ogg or aiff maybe */
if(!(infile=fopen(file,"rb"))) {
DPRINTF(ERR_WARN,"Could not open %s for reading\n",file);
return -1;
}
/* we can at least get this */
fseek(infile,0,SEEK_END);
file_size=ftell(infile);
fseek(infile,0,SEEK_SET);
pmp3->file_size=file_size;
fclose(infile);
return 0;
}
/*
* scan_get_aacfileinfo
*
* Get info from the actual aac headers
*/
int scan_get_aacfileinfo(char *file, MP3FILE *pmp3) {
FILE *infile;
long atom_offset;
int atom_length;
int temp_int;
off_t file_size;
DPRINTF(ERR_DEBUG,"Getting AAC file info\n");
if(!(infile=fopen(file,"rb"))) {
DPRINTF(ERR_WARN,"Could not open %s for reading\n",file);
return -1;
}
fseek(infile,0,SEEK_END);
file_size=ftell(infile);
fseek(infile,0,SEEK_SET);
pmp3->file_size=file_size;
/* now, hunt for the mvhd atom */
atom_offset=scan_aac_findatom(infile,file_size,"moov",&atom_length);
if(atom_offset != -1) {
atom_offset=scan_aac_findatom(infile,atom_length-8,"mvhd",&atom_length);
if(atom_offset != -1) {
fseek(infile,16,SEEK_CUR);
fread((void*)&temp_int,1,sizeof(int),infile);
temp_int=ntohl(temp_int);
/* DWB: use ms time instead of sec */
pmp3->song_length=temp_int * 1000 / 600;
DPRINTF(ERR_DEBUG,"Song length: %d seconds\n", pmp3->song_length / 1000);
}
}
fclose(infile);
return 0;
}
/*
* scan_get_mp3fileinfo
*
* Get information from the file headers itself -- like
* song length, bit rate, etc.
*/
int scan_get_mp3fileinfo(char *file, MP3FILE *pmp3) {
FILE *infile;
SCAN_ID3HEADER *pid3;
unsigned int size=0;
off_t fp_size=0;
off_t file_size;
unsigned char buffer[1024];
int index;
int layer_index;
int sample_index;
int ver=0;
int layer=0;
int bitrate=0;
int samplerate=0;
int stereo=0;
if(!(infile=fopen(file,"rb"))) {
DPRINTF(ERR_WARN,"Could not open %s for reading\n",file);
return -1;
}
fseek(infile,0,SEEK_END);
file_size=ftell(infile);
fseek(infile,0,SEEK_SET);
pmp3->file_size=file_size;
if(fread(buffer,1,sizeof(buffer),infile) != sizeof(buffer)) {
if(ferror(infile)) {
DPRINTF(ERR_LOG,"Error reading: %s\n",strerror(errno));
} else {
DPRINTF(ERR_LOG,"Short file: %s\n",infile);
}
return -1;
}
pid3=(SCAN_ID3HEADER*)buffer;
if(strncmp(pid3->id,"ID3",3)==0) {
/* found an ID3 header... */
DPRINTF(ERR_DEBUG,"Found ID3 header\n");
size = (pid3->size[0] << 21 | pid3->size[1] << 14 |
pid3->size[2] << 7 | pid3->size[3]);
fp_size=size + sizeof(SCAN_ID3HEADER);
DPRINTF(ERR_DEBUG,"Header length: %d\n",size);
}
file_size -= fp_size;
fseek(infile,fp_size,SEEK_SET);
if(fread(buffer,1,sizeof(buffer),infile) < sizeof(buffer)) {
DPRINTF(ERR_LOG,"Short file: %s\n",file);
return -1;
}
index=0;
while(((buffer[index] != 0xFF) || (buffer[index+1] < 224)) &&
(index < (sizeof(buffer)-10))) {
index++;
}
if(index) {
DPRINTF(ERR_DEBUG,"Scanned forward %d bytes to find frame header\n",index);
}
if((buffer[index] == 0xFF)&&(buffer[index+1] >= 224)) {
ver=(buffer[index+1] & 0x18) >> 3;
layer=(buffer[index+1] & 0x6) >> 1;
layer_index=-1;
sample_index=-1;
switch(ver) {
case 0: /* MPEG Version 2.5 */
sample_index=2;
if(layer == 3)
layer_index=3;
else
layer_index=4;
break;
case 2: /* MPEG Version 2 */
sample_index=1;
if(layer == 3)
layer_index=3;
else
layer_index=4;
break;
case 3: /* MPEG Version 1 */
sample_index=0;
if(layer == 3) /* layer 1 */
layer_index=0;
if(layer == 2) /* layer 2 */
layer_index=1;
if(layer == 1) /* layer 3 */
layer_index=2;
break;
}
if((layer_index < 0) || (layer_index > 4)) {
DPRINTF(ERR_LOG,"Bad mp3 header in %s: bad layer_index\n",file);
return -1;
}
if((sample_index < 0) || (sample_index > 2)) {
DPRINTF(ERR_LOG,"Bad mp3 header in %s: bad sample_index\n",file);
return -1;
}
bitrate=(buffer[index+2] & 0xF0) >> 4;
bitrate=scan_br_table[layer_index][bitrate];
samplerate=(buffer[index+2] & 0x0C) >> 2; /* can only be 0-3 */
samplerate=scan_sample_table[sample_index][samplerate];
pmp3->bitrate=bitrate;
pmp3->samplerate=samplerate;
stereo=buffer[index+3] & 0xC0 >> 6;
if(stereo == 3)
stereo=0;
else
stereo=1;
DPRINTF(ERR_DEBUG," MPEG Version: %s\n",ver == 3 ? "1" : (ver == 2 ? "2" : "2.5"));
DPRINTF(ERR_DEBUG," Layer: %d\n",4-layer);
DPRINTF(ERR_DEBUG," Sample Rate: %d\n",samplerate);
DPRINTF(ERR_DEBUG," Bit Rate: %d\n",bitrate);
/* guesstimate the file length */
if(!pmp3->song_length) /* could have gotten it from the tag */
{
/* DWB: use ms time instead of seconds, use doubles to
avoid overflow */
if(bitrate)
{
pmp3->song_length = (int) ((double) file_size * 8000. /
(double) bitrate /
1024.);
}
}
} else {
/* FIXME: should really scan forward to next sync frame */
fclose(infile);
DPRINTF(ERR_DEBUG,"Could not find sync frame\n");
return 0;
}
fclose(infile);
return 0;
}
void make_composite_tags(MP3FILE *song)
{
int len;
len=0;
if(!song->artist && (song->orchestra || song->conductor)) {
if(song->orchestra)
len += strlen(song->orchestra);
if(song->conductor)
len += strlen(song->conductor);
len += 3;
song->artist=(char*)calloc(len, 1);
if(song->artist) {
if(song->orchestra)
strcat(song->artist,song->orchestra);
if(song->orchestra && song->conductor)
strcat(song->artist," - ");
if(song->conductor)
strcat(song->artist,song->conductor);
}
}
if(!strcasecmp(song->type,"ogg")) {
song->description = strdup("QuickTime movie file");
} else {
char fdescr[50];
sprintf(fdescr,"%s audio file",song->type);
song->description = strdup(fdescr);
}
if(!song->title)
song->title = strdup(song->fname);
if(!strcmp(song->type, "ogg"))
song->item_kind = 4;
else
song->item_kind = 2;
}
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