void AudioCDDemux::freedb_get_disc_info( cddb_disc_t *cddb_disc )
{
if ( cddb_disc )
{
cdTitle = cddb_disc_get_title( cddb_disc );
cdArtist = cddb_disc_get_artist( cddb_disc );
}
}
static CdAlbum toAlbum(cddb_disc_t *disc, const CdAlbum &initial=CdAlbum())
{
CdAlbum album;
if (!disc) {
return album;
}
album.name=QString::fromUtf8(cddb_disc_get_title(disc));
album.artist=QString::fromUtf8(cddb_disc_get_artist(disc));
album.genre=QString::fromUtf8(cddb_disc_get_genre(disc));
album.year=cddb_disc_get_year(disc);
int numTracks=cddb_disc_get_track_count(disc);
if (numTracks>0) {
for (int t=0; t<numTracks; ++t) {
cddb_track_t *trk=cddb_disc_get_track(disc, t);
if (!trk) {
continue;
}
Song track;
track.track=cddb_track_get_number(trk);
track.title=QString::fromUtf8(cddb_track_get_title(trk));
track.artist=QString::fromUtf8(cddb_track_get_artist(trk));
track.albumartist=album.artist;
track.album=album.name;
track.id=track.track;
track.file=QString("%1.wav").arg(track.track);
track.year=album.year;
if (initial.isNull()) {
track.time=cddb_track_get_length(trk);
if (CddbInterface::dataTrack()==track.title) {
// Adjust last track length...
if (album.tracks.count()) {
Song last=album.tracks.takeLast();
last.time-=FRAMES_TO_SECONDS(11400);
album.tracks.append(last);
}
} else {
album.tracks.append(track);
}
} else if (t>=initial.tracks.count()) {
break;
} else {
track.time=initial.tracks.at(t).time;
album.tracks.append(track);
}
}
}
// Ensure we always have same number of tracks...
if (!initial.isNull() && album.tracks.count()<initial.tracks.count()) {
for (int i=album.tracks.count(); i<initial.tracks.count(); ++i) {
album.tracks.append(initial.tracks.at(i));
}
}
return album;
}
static void
cd_get_metadata (cdda_t *cd, cddb_disc_t *disc)
{
if (!cd || !disc)
return;
if (cddb_disc_get_artist (disc))
cd->artist = strdup (cddb_disc_get_artist (disc));
if (cddb_disc_get_title (disc))
cd->title = strdup (cddb_disc_get_title (disc));
if (cddb_disc_get_ext_data (disc))
cd->ext_data = strdup (cddb_disc_get_ext_data (disc));
if (cddb_disc_get_genre (disc))
cd->genre = strdup (cddb_disc_get_genre (disc));
cd->year = cddb_disc_get_year (disc);
cd->length = cddb_disc_get_length (disc);
}
static void
cddb_thread (void *items_i)
{
struct cddb_thread_params *params = (struct cddb_thread_params*)items_i;
DB_playItem_t **items = params->items;
trace ("calling resolve_disc\n");
cddb_disc_t* disc = resolve_disc (params->cdio);
if (!disc)
{
trace ("disc not resolved\n");
if (params->cdio) {
cdio_destroy (params->cdio);
}
free (params);
return;
}
trace ("disc resolved\n");
const char *disc_title = cddb_disc_get_title (disc);
const char *artist = cddb_disc_get_artist (disc);
trace ("disc_title=%s, disk_artist=%s\n", disc_title, artist);
cddb_track_t *track;
int i;
// FIXME: playlist must be locked before doing that
int trk = 1;
for (i = 0, track = cddb_disc_get_track_first (disc); items[i]; trk++, ++i, track = cddb_disc_get_track_next (disc))
{
// FIXME: problem will happen here if item(s) were deleted from playlist, and new items were added in their places
// possible solutions: catch EV_TRACKDELETED and mark item(s) in every thread as NULL
trace ("track %d, artist=%s, album=%s, title=%s\n", i, artist, disc_title, cddb_track_get_title (track));
deadbeef->pl_delete_all_meta (items[i]);
deadbeef->pl_add_meta (items[i], "artist", artist);
deadbeef->pl_add_meta (items[i], "album", disc_title);
deadbeef->pl_add_meta (items[i], "title", cddb_track_get_title (track));
char tmp[5];
snprintf (tmp, sizeof (tmp), "%02d", trk);
deadbeef->pl_add_meta (items[i], "track", tmp);
ddb_event_track_t *ev = (ddb_event_track_t *)deadbeef->event_alloc (DB_EV_TRACKINFOCHANGED);
ev->track = items[i];
if (ev->track) {
deadbeef->pl_item_ref (ev->track);
}
deadbeef->event_send ((ddb_event_t *)ev, 0, 0);
}
cddb_disc_destroy (disc);
cleanup_thread_params (params);
ddb_playlist_t *plt = deadbeef->plt_get_curr ();
if (plt) {
deadbeef->plt_modified (plt);
deadbeef->plt_unref (plt);
}
deadbeef->sendmessage (DB_EV_PLAYLISTCHANGED, 0, 0, 0);
}
static void
write_metadata(DB_playItem_t *it, const cddb_disc_t *disc, const char *num_tracks)
{
const int track_nr = deadbeef->pl_find_meta_int(it, "track", 0);
cddb_track_t *track = cddb_disc_get_track(disc, track_nr-1);
replace_meta(it, "artist", cddb_disc_get_artist(disc));
replace_meta(it, "title", cddb_track_get_title(track));
replace_meta(it, "album", cddb_disc_get_title(disc));
replace_meta(it, "genre", cddb_disc_get_genre(disc));
const unsigned int year = cddb_disc_get_year(disc);
year ? deadbeef->pl_set_meta_int(it, "year", year) : deadbeef->pl_delete_meta(it, "year");
replace_meta(it, "numtracks", num_tracks);
ddb_event_track_t *ev = (ddb_event_track_t *)deadbeef->event_alloc(DB_EV_TRACKINFOCHANGED);
ev->track = it;
if (ev->track) {
deadbeef->pl_item_ref(ev->track);
}
deadbeef->event_send((ddb_event_t *)ev, 0, 0);
}
int main(int argc, char *argv[]) {
/*initialize the connection to the freedb server */
cddb_conn_t *conn = NULL;
cddb_disc_t *disc;
cddb_track_t *track;
conn = init_conn();
/* set track info */
if (argc != 4) {
fprintf(stderr, "usage: cddb_query <discid> <category> <track number>\n");
return -1;
}
char *p;
unsigned long discid = strtoul(argv[1], &p, 16);
char *cat = argv[2];
lowercase(cat);
int tracknum = atoi(argv[3]);
/* initialize the disc */
disc = init_disc();
cddb_disc_set_discid(disc, discid);
cddb_disc_set_category_str(disc, cat);
/* query the database to populate the disc info */
read_db(conn, disc);
/* extract the track from the disc */
track = cddb_disc_get_track(disc, tracknum - 1);
/* format an output track info */
const char *title = cddb_track_get_title(track);
const char *artist = cddb_disc_get_artist(disc);
const char *album = cddb_disc_get_title(disc);
unsigned int date = cddb_disc_get_year(disc);
const char *label = "";
const char *genre = cddb_disc_get_genre(disc);
printf("%s\t%s\t%s\t%d\t%s\t%s\t", title, artist, album, date, label, genre);
return 0;
}
static int GetTracks( access_t *p_access, input_item_t *p_current )
{
access_sys_t *p_sys = p_access->p_sys;
const int i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
p_sys->vcddev, &p_sys->p_sectors );
if( i_titles <= 0 )
{
if( i_titles < 0 )
msg_Err( p_access, "unable to count tracks" );
else if( i_titles <= 0 )
msg_Err( p_access, "no audio tracks found" );
return VLC_EGENERIC;;
}
/* */
input_item_SetName( p_current, "Audio CD" );
const char *psz_album = NULL;
const char *psz_year = NULL;
const char *psz_genre = NULL;
const char *psz_artist = NULL;
const char *psz_description = NULL;
/* Return true if the given string is not NULL and not empty */
#define NONEMPTY( psz ) ( (psz) && *(psz) )
/* If the given string is NULL or empty, fill it by the return value of 'code' */
#define ON_EMPTY( psz, code ) do { if( !NONEMPTY( psz) ) { (psz) = code; } } while(0)
/* Retreive CDDB information */
#ifdef HAVE_LIBCDDB
char psz_year_buffer[4+1];
msg_Dbg( p_access, "fetching infos with CDDB" );
cddb_disc_t *p_disc = GetCDDBInfo( p_access, i_titles, p_sys->p_sectors );
if( p_disc )
{
psz_album = cddb_disc_get_title( p_disc );
psz_genre = cddb_disc_get_genre( p_disc );
/* */
const unsigned i_year = cddb_disc_get_year( p_disc );
if( i_year > 0 )
{
psz_year = psz_year_buffer;
snprintf( psz_year_buffer, sizeof(psz_year_buffer), "%u", i_year );
}
/* Set artist only if unique */
for( int i = 0; i < i_titles; i++ )
{
cddb_track_t *t = cddb_disc_get_track( p_disc, i );
if( !t )
continue;
const char *psz_track_artist = cddb_track_get_artist( t );
if( psz_artist && psz_track_artist &&
strcmp( psz_artist, psz_track_artist ) )
{
psz_artist = NULL;
break;
}
psz_artist = psz_track_artist;
}
}
#endif
/* CD-Text */
vlc_meta_t **pp_cd_text;
int i_cd_text;
if( ioctl_GetCdText( VLC_OBJECT(p_access), p_sys->vcddev, &pp_cd_text, &i_cd_text ) )
{
msg_Dbg( p_access, "CD-TEXT information missing" );
i_cd_text = 0;
pp_cd_text = NULL;
}
/* Retrieve CD-TEXT information but prefer CDDB */
if( i_cd_text > 0 && pp_cd_text[0] )
{
const vlc_meta_t *p_disc = pp_cd_text[0];
ON_EMPTY( psz_album, vlc_meta_Get( p_disc, vlc_meta_Album ) );
ON_EMPTY( psz_genre, vlc_meta_Get( p_disc, vlc_meta_Genre ) );
ON_EMPTY( psz_artist, vlc_meta_Get( p_disc, vlc_meta_Artist ) );
ON_EMPTY( psz_description, vlc_meta_Get( p_disc, vlc_meta_Description ) );
}
if( NONEMPTY( psz_album ) )
{
input_item_SetName( p_current, psz_album );
input_item_SetAlbum( p_current, psz_album );
}
if( NONEMPTY( psz_genre ) )
input_item_SetGenre( p_current, psz_genre );
if( NONEMPTY( psz_artist ) )
input_item_SetArtist( p_current, psz_artist );
if( NONEMPTY( psz_year ) )
input_item_SetDate( p_current, psz_year );
if( NONEMPTY( psz_description ) )
input_item_SetDescription( p_current, psz_description );
const mtime_t i_duration = (int64_t)( p_sys->p_sectors[i_titles] - p_sys->p_sectors[0] ) *
CDDA_DATA_SIZE * 1000000 / 44100 / 2 / 2;
input_item_SetDuration( p_current, i_duration );
input_item_node_t *p_root = input_item_node_Create( p_current );
/* Build title table */
for( int i = 0; i < i_titles; i++ )
{
input_item_t *p_input_item;
char *psz_uri, *psz_opt, *psz_first, *psz_last;
char *psz_name;
msg_Dbg( p_access, "track[%d] start=%d", i, p_sys->p_sectors[i] );
/* */
if( asprintf( &psz_uri, "cdda://%s", p_access->psz_location ) == -1 )
psz_uri = NULL;
if( asprintf( &psz_opt, "cdda-track=%i", i+1 ) == -1 )
psz_opt = NULL;
if( asprintf( &psz_first, "cdda-first-sector=%i",p_sys->p_sectors[i] ) == -1 )
psz_first = NULL;
if( asprintf( &psz_last, "cdda-last-sector=%i", p_sys->p_sectors[i+1] ) == -1 )
psz_last = NULL;
/* Define a "default name" */
if( asprintf( &psz_name, _("Audio CD - Track %02i"), (i+1) ) == -1 )
psz_name = NULL;
/* Create playlist items */
const mtime_t i_duration = (int64_t)( p_sys->p_sectors[i+1] - p_sys->p_sectors[i] ) *
CDDA_DATA_SIZE * 1000000 / 44100 / 2 / 2;
p_input_item = input_item_NewWithType( psz_uri, psz_name, 0, NULL, 0,
i_duration, ITEM_TYPE_DISC );
input_item_CopyOptions( p_current, p_input_item );
input_item_AddOption( p_input_item, psz_first, VLC_INPUT_OPTION_TRUSTED );
input_item_AddOption( p_input_item, psz_last, VLC_INPUT_OPTION_TRUSTED );
input_item_AddOption( p_input_item, psz_opt, VLC_INPUT_OPTION_TRUSTED );
const char *psz_track_title = NULL;
const char *psz_track_artist = NULL;
const char *psz_track_genre = NULL;
const char *psz_track_description = NULL;
#ifdef HAVE_LIBCDDB
/* Retreive CDDB information */
if( p_disc )
{
cddb_track_t *t = cddb_disc_get_track( p_disc, i );
if( t != NULL )
{
psz_track_title = cddb_track_get_title( t );
psz_track_artist = cddb_track_get_artist( t );
}
}
#endif
/* Retreive CD-TEXT information but prefer CDDB */
if( i+1 < i_cd_text && pp_cd_text[i+1] )
{
const vlc_meta_t *t = pp_cd_text[i+1];
ON_EMPTY( psz_track_title, vlc_meta_Get( t, vlc_meta_Title ) );
ON_EMPTY( psz_track_artist, vlc_meta_Get( t, vlc_meta_Artist ) );
ON_EMPTY( psz_track_genre, vlc_meta_Get( t, vlc_meta_Genre ) );
ON_EMPTY( psz_track_description, vlc_meta_Get( t, vlc_meta_Description ) );
}
/* */
ON_EMPTY( psz_track_artist, psz_artist );
ON_EMPTY( psz_track_genre, psz_genre );
ON_EMPTY( psz_track_description, psz_description );
/* */
if( NONEMPTY( psz_track_title ) )
{
input_item_SetName( p_input_item, psz_track_title );
input_item_SetTitle( p_input_item, psz_track_title );
}
if( NONEMPTY( psz_track_artist ) )
input_item_SetArtist( p_input_item, psz_track_artist );
if( NONEMPTY( psz_track_genre ) )
input_item_SetGenre( p_input_item, psz_track_genre );
if( NONEMPTY( psz_track_description ) )
input_item_SetDescription( p_input_item, psz_track_description );
if( NONEMPTY( psz_album ) )
input_item_SetAlbum( p_input_item, psz_album );
if( NONEMPTY( psz_year ) )
input_item_SetDate( p_input_item, psz_year );
char psz_num[3+1];
snprintf( psz_num, sizeof(psz_num), "%d", 1+i );
input_item_SetTrackNum( p_input_item, psz_num );
input_item_node_AppendItem( p_root, p_input_item );
vlc_gc_decref( p_input_item );
free( psz_uri ); free( psz_opt ); free( psz_name );
free( psz_first ); free( psz_last );
}
#undef ON_EMPTY
#undef NONEMPTY
input_item_node_PostAndDelete( p_root );
/* */
for( int i = 0; i < i_cd_text; i++ )
{
vlc_meta_t *p_meta = pp_cd_text[i];
if( !p_meta )
continue;
vlc_meta_Delete( p_meta );
}
free( pp_cd_text );
#ifdef HAVE_LIBCDDB
if( p_disc )
cddb_disc_destroy( p_disc );
#endif
return VLC_SUCCESS;
}
/* mutex must be locked */
static void scan_cd (void)
{
AUDDBG ("Scanning CD drive.\n");
g_return_if_fail (pcdrom_drive != NULL);
g_return_if_fail (trackinfo == NULL);
gint trackno;
/* general track initialization */
/* skip endianness detection (because it only affects cdda_read, and we use
* cdio_read_audio_sectors instead) */
pcdrom_drive->bigendianp = 0;
/* finish initialization of drive/disc (performs disc TOC sanitization) */
if (cdda_open (pcdrom_drive) != 0)
{
cdaudio_error ("Failed to finish initializing opened CD drive.");
goto ERR;
}
if (cdda_speed_set (pcdrom_drive, cdng_cfg.disc_speed) != DRIVER_OP_SUCCESS)
warn ("Cannot set drive speed.\n");
firsttrackno = cdio_get_first_track_num (pcdrom_drive->p_cdio);
lasttrackno = cdio_get_last_track_num (pcdrom_drive->p_cdio);
if (firsttrackno == CDIO_INVALID_TRACK || lasttrackno == CDIO_INVALID_TRACK)
{
cdaudio_error ("Failed to retrieve first/last track number.");
goto ERR;
}
AUDDBG ("first track is %d and last track is %d\n", firsttrackno,
lasttrackno);
trackinfo = (trackinfo_t *) g_new (trackinfo_t, (lasttrackno + 1));
cdaudio_set_fullinfo (&trackinfo[0],
cdda_track_firstsector (pcdrom_drive, 0),
cdda_track_lastsector (pcdrom_drive, lasttrackno),
"", "", "");
n_audio_tracks = 0;
for (trackno = firsttrackno; trackno <= lasttrackno; trackno++)
{
cdaudio_set_fullinfo (&trackinfo[trackno],
cdda_track_firstsector (pcdrom_drive, trackno),
cdda_track_lastsector (pcdrom_drive, trackno),
"", "", "");
if (trackinfo[trackno].startlsn == CDIO_INVALID_LSN
|| trackinfo[trackno].endlsn == CDIO_INVALID_LSN)
{
cdaudio_error ("Cannot read start/end LSN for track %d.", trackno);
goto ERR;
}
/* count how many tracks are audio tracks */
if (cdda_track_audiop (pcdrom_drive, trackno))
n_audio_tracks++;
}
/* get trackinfo[0] cdtext information (the disc) */
if (cdng_cfg.use_cdtext)
{
AUDDBG ("getting cd-text information for disc\n");
cdtext_t *pcdtext = cdio_get_cdtext (pcdrom_drive->p_cdio, 0);
if (pcdtext == NULL || pcdtext->field[CDTEXT_TITLE] == NULL)
{
AUDDBG ("no cd-text available for disc\n");
}
else
{
cdaudio_set_strinfo (&trackinfo[0],
pcdtext->field[CDTEXT_PERFORMER] ? pcdtext->
field[CDTEXT_PERFORMER] : "",
pcdtext->field[CDTEXT_TITLE] ? pcdtext->
field[CDTEXT_TITLE] : "",
pcdtext->field[CDTEXT_GENRE] ? pcdtext->
field[CDTEXT_GENRE] : "");
}
}
/* get track information from cdtext */
gboolean cdtext_was_available = FALSE;
for (trackno = firsttrackno; trackno <= lasttrackno; trackno++)
{
cdtext_t *pcdtext = NULL;
if (cdng_cfg.use_cdtext)
{
AUDDBG ("getting cd-text information for track %d\n", trackno);
pcdtext = cdio_get_cdtext (pcdrom_drive->p_cdio, trackno);
if (pcdtext == NULL || pcdtext->field[CDTEXT_PERFORMER] == NULL)
{
AUDDBG ("no cd-text available for track %d\n", trackno);
pcdtext = NULL;
}
}
if (pcdtext != NULL)
{
cdaudio_set_strinfo (&trackinfo[trackno],
pcdtext->field[CDTEXT_PERFORMER] ? pcdtext->
field[CDTEXT_PERFORMER] : "",
pcdtext->field[CDTEXT_TITLE] ? pcdtext->
field[CDTEXT_TITLE] : "",
pcdtext->field[CDTEXT_GENRE] ? pcdtext->
field[CDTEXT_GENRE] : "");
cdtext_was_available = TRUE;
}
else
{
cdaudio_set_strinfo (&trackinfo[trackno], "", "", "");
snprintf (trackinfo[trackno].name, DEF_STRING_LEN,
"Track %d", trackno);
}
}
if (!cdtext_was_available)
{
/* initialize de cddb subsystem */
cddb_conn_t *pcddb_conn = NULL;
cddb_disc_t *pcddb_disc = NULL;
cddb_track_t *pcddb_track = NULL;
lba_t lba; /* Logical Block Address */
if (cdng_cfg.use_cddb)
{
pcddb_conn = cddb_new ();
if (pcddb_conn == NULL)
cdaudio_error ("Failed to create the cddb connection.");
else
{
AUDDBG ("getting CDDB info\n");
cddb_cache_enable (pcddb_conn);
// cddb_cache_set_dir(pcddb_conn, "~/.cddbslave");
if (cdng_cfg.use_proxy)
{
cddb_http_proxy_enable (pcddb_conn);
cddb_set_http_proxy_server_name (pcddb_conn,
cdng_cfg.proxy_host);
cddb_set_http_proxy_server_port (pcddb_conn,
cdng_cfg.proxy_port);
cddb_set_http_proxy_username (pcddb_conn,
cdng_cfg.proxy_username);
cddb_set_http_proxy_password (pcddb_conn,
cdng_cfg.proxy_password);
cddb_set_server_name (pcddb_conn, cdng_cfg.cddb_server);
cddb_set_server_port (pcddb_conn, cdng_cfg.cddb_port);
}
else if (cdng_cfg.cddb_http)
{
cddb_http_enable (pcddb_conn);
cddb_set_server_name (pcddb_conn, cdng_cfg.cddb_server);
cddb_set_server_port (pcddb_conn, cdng_cfg.cddb_port);
cddb_set_http_path_query (pcddb_conn, cdng_cfg.cddb_path);
}
else
{
cddb_set_server_name (pcddb_conn, cdng_cfg.cddb_server);
cddb_set_server_port (pcddb_conn, cdng_cfg.cddb_port);
}
pcddb_disc = cddb_disc_new ();
lba = cdio_get_track_lba (pcdrom_drive->p_cdio,
CDIO_CDROM_LEADOUT_TRACK);
cddb_disc_set_length (pcddb_disc, FRAMES_TO_SECONDS (lba));
for (trackno = firsttrackno; trackno <= lasttrackno; trackno++)
{
pcddb_track = cddb_track_new ();
cddb_track_set_frame_offset (pcddb_track,
cdio_get_track_lba (
pcdrom_drive->p_cdio,
trackno));
cddb_disc_add_track (pcddb_disc, pcddb_track);
}
cddb_disc_calc_discid (pcddb_disc);
#if DEBUG
guint discid = cddb_disc_get_discid (pcddb_disc);
AUDDBG ("CDDB disc id = %x\n", discid);
#endif
gint matches;
if ((matches = cddb_query (pcddb_conn, pcddb_disc)) == -1)
{
if (cddb_errno (pcddb_conn) == CDDB_ERR_OK)
cdaudio_error ("Failed to query the CDDB server");
else
cdaudio_error ("Failed to query the CDDB server: %s",
cddb_error_str (cddb_errno
(pcddb_conn)));
cddb_disc_destroy (pcddb_disc);
pcddb_disc = NULL;
}
else
{
if (matches == 0)
{
AUDDBG ("no cddb info available for this disc\n");
cddb_disc_destroy (pcddb_disc);
pcddb_disc = NULL;
}
else
{
AUDDBG ("CDDB disc category = \"%s\"\n",
cddb_disc_get_category_str (pcddb_disc));
cddb_read (pcddb_conn, pcddb_disc);
if (cddb_errno (pcddb_conn) != CDDB_ERR_OK)
{
cdaudio_error ("failed to read the cddb info: %s",
cddb_error_str (cddb_errno
(pcddb_conn)));
cddb_disc_destroy (pcddb_disc);
pcddb_disc = NULL;
}
else
{
cdaudio_set_strinfo (&trackinfo[0],
cddb_disc_get_artist
(pcddb_disc),
cddb_disc_get_title
(pcddb_disc),
cddb_disc_get_genre
(pcddb_disc));
gint trackno;
for (trackno = firsttrackno; trackno <= lasttrackno;
trackno++)
{
cddb_track_t *pcddb_track =
cddb_disc_get_track (pcddb_disc,
trackno - 1);
cdaudio_set_strinfo (&trackinfo[trackno],
cddb_track_get_artist
(pcddb_track),
cddb_track_get_title
(pcddb_track),
cddb_disc_get_genre
(pcddb_disc));
}
}
}
}
}
}
if (pcddb_disc != NULL)
cddb_disc_destroy (pcddb_disc);
if (pcddb_conn != NULL)
cddb_destroy (pcddb_conn);
}
return;
ERR:
g_free (trackinfo);
trackinfo = NULL;
}
void do_query(cddb_conn_t *conn, cddb_disc_t *disc, int quiet)
{
int matches, i;
/* This command also requires the disc ID to be initalized
correctly. So we first calculate this disc ID before executing
the query command. */
cddb_disc_calc_discid(disc);
/* Try querying the database for information about the provided
disc. This function will return the number of matches that
were found. A return value of 0 means that no matches were
found. The data of the first match (when found) will be filled
in into the disc structure passed to it. The information will
be retrieved from the server or read from the cache depending
on the connection settings. */
matches = cddb_query(conn, disc);
/* If an error occured then the return value will be -1 and the
internal libcddb error number will be set. */
if (matches == -1) {
/* Print an explanatory message on stderr. Other routines are
available for retrieving the message without printing it or
printing it on a stream other than stderr. */
if (!quiet) {
cddb_error_print(cddb_errno(conn));
}
/* Return to calling fucntion. */
return;
}
printf("Number of matches: %d\n", matches);
/* A CDDB query command will not return all the disc information.
It will return a subset that can afterwards be used to do a
CDDB read. This enables you to first show a pop-up listing the
found matches before doing further reads for the full data.
The data that is returned for each match is: the disc CDDB
category, the disc ID as known by the server, the disc title
and the artist's name. */
/* Let's loop over the matches. */
i = 0;
while (i < matches) {
/* Increment the match counter. */
i++;
/* Print out the information for the current match. */
printf("Match %d\n", i);
/* Retrieve and print the category and disc ID. */
printf(" category: %s (%d)\t%08x\n", cddb_disc_get_category_str(disc),
cddb_disc_get_category(disc), cddb_disc_get_discid(disc));
/* Retrieve and print the disc title and artist name. */
printf(" '%s' by %s\n", cddb_disc_get_title(disc),
cddb_disc_get_artist(disc));
/* Get the next match, if there is one left. */
if (i < matches) {
/* If there are multiple matches, then you can use the
following function to retrieve the matches beyond the
first. This function will overwrite any data that
might be present in the disc structure passed to it.
So if you still need that disc for anything else, then
first create a new disc and use that to call this
function. If there are no more matches left, false
(i.e. 0) will be returned. */
if (!cddb_query_next(conn, disc)) {
error_exit(cddb_errno(conn), "query index out of bounds");
}
}
}
}
