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/* Icecast
*
* This program is distributed under the GNU General Public License, version 2.
* A copy of this license is included with this source.
*
* Copyright 2015, Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
/* for free() and strdup() */
#include <stdlib.h>
#include <string.h>
#include "playlist.h"
/* for XMLSTR() */
#include "cfgfile.h"
#include "logging.h"
#define CATMODULE "playlist"
typedef struct playlist_track_tag playlist_track_t;
struct playlist_tag {
size_t refc;
ssize_t max_tracks;
playlist_track_t *first;
};
struct playlist_track_tag {
char *title;
char *creator;
char *album;
char *trackNum;
playlist_track_t *next;
};
static void __free_track(playlist_track_t *track)
{
if (track->title)
free(track->title);
if (track->creator)
free(track->creator);
if (track->album)
free(track->album);
if (track->trackNum)
free(track->trackNum);
free(track);
}
static char * __query_vc(vorbis_comment *vc, const char *key)
{
char *value = vorbis_comment_query(vc, key, 0);
if (!value)
return NULL;
return strdup(value);
}
playlist_t * playlist_new(ssize_t max_tracks)
{
playlist_t *playlist = calloc(1, sizeof(playlist_t));
if (!playlist)
return NULL;
playlist->refc = 1;
playlist->max_tracks = max_tracks;
return playlist;
}
int playlist_ref(playlist_t *playlist)
{
if (!playlist)
return -1;
playlist->refc++;
return 0;
}
int playlist_release(playlist_t *playlist)
{
playlist_track_t *track;
if (!playlist)
return -1;
playlist->refc--;
if (playlist->refc)
return 0;
while ((track = playlist->first)) {
playlist->first = track->next;
__free_track(track);
}
free(playlist);
return 0;
}
int playlist_set_max_tracks(playlist_t *playlist, ssize_t max_tracks)
{
if (!playlist)
return -1;
playlist->max_tracks = max_tracks;
return 0;
}
int playlist_push_track(playlist_t *playlist, vorbis_comment *vc)
{
playlist_track_t *track, **cur;
ssize_t num = 0;
if (!playlist)
return -1;
track = calloc(1, sizeof(playlist_track_t));
if (!track)
return -1;
cur = &playlist->first;
while (*cur) {
cur = &(*cur)->next;
num++;
}
*cur = track;
num++; /* the extra track we just inserted */
while (playlist->max_tracks > 0 && num > playlist->max_tracks) {
playlist_track_t *to_free = playlist->first;
playlist->first = to_free->next;
__free_track(to_free);
num--;
}
if (vc) {
track->title = __query_vc(vc, "TITLE");
track->creator = __query_vc(vc, "ARTIST");
track->album = __query_vc(vc, "ALBUM");
track->trackNum = __query_vc(vc, "TRACKNUMBER");
if (!track->title && !track->creator && !track->album && !track->trackNum) {
/* no useful meta data has been found. try ICY style meta data */
track->title = __query_vc(vc, "X_ICY_TITLE");
}
}
return 0;
}
xmlNodePtr playlist_render_xspf(playlist_t *playlist)
{
xmlNodePtr rootnode, tracklist, tracknode;
playlist_track_t *track;
if (!playlist)
return NULL;
rootnode = xmlNewNode(NULL, XMLSTR("playlist"));
xmlSetProp(rootnode, XMLSTR("version"), XMLSTR("1"));
xmlSetProp(rootnode, XMLSTR("xmlns"), XMLSTR(XMLNS_XSPF));
tracklist = xmlNewNode(NULL, XMLSTR("trackList"));
xmlAddChild(rootnode, tracklist);
track = playlist->first;
while (track) {
tracknode = xmlNewNode(NULL, XMLSTR("track"));
xmlAddChild(tracklist, tracknode);
/* TODO: Handle meta data */
if (track->title)
xmlNewTextChild(tracknode, NULL, XMLSTR("title"), XMLSTR(track->title));
if (track->creator)
xmlNewTextChild(tracknode, NULL, XMLSTR("creator"), XMLSTR(track->creator));
if (track->album)
xmlNewTextChild(tracknode, NULL, XMLSTR("album"), XMLSTR(track->album));
if (track->trackNum)
xmlNewTextChild(tracknode, NULL, XMLSTR("trackNum"), XMLSTR(track->trackNum));
track = track->next;
}
return rootnode;
}
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