mdw@git.distorted.org.uk Git - disorder/blob - lib/queue.h

   1 /*
   2  * This file is part of DisOrder.
   3  * Copyright (C) 2004, 2005, 2006 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20
  21 #ifndef QUEUE_H
  22 #define QUEUE_H
  23
  24 enum playing_state {
  25   playing_failed,                       /* failed to play */
  26   playing_isscratch,                    /* this is a scratch track */
  27   playing_no_player,                    /* couldn't find a player */
  28   playing_ok,                           /* played OK */
  29   playing_paused,                       /* started but paused */
  30   playing_quitting,                     /* interrupt because server quit */
  31   playing_random,                       /* unplayed randomly chosen track */
  32   playing_scratched,                    /* was scratched */
  33   playing_started,                      /* started to play */
  34   playing_unplayed                      /* haven't played this track yet */
  35 };
  36
  37 extern const char *playing_states[];
  38
  39 /* queue entries form a circular doubly-linked list */
  40 struct queue_entry {
  41   struct queue_entry *next;             /* next entry */
  42   struct queue_entry *prev;             /* previous entry */
  43   const char *track;                    /* path to track */
  44   const char *submitter;                /* name of submitter */
  45   time_t when;                          /* time submitted */
  46   time_t played;                        /* when played */
  47   enum playing_state state;             /* state */
  48   long wstat;                           /* wait status */
  49   const char *scratched;                /* scratched by */
  50   const char *id;                       /* queue entry ID */
  51   time_t expected;                      /* expected started time */
  52   /* for playing or soon-to-be-played tracks only: */
  53   unsigned long type;                   /* type word from plugin */
  54   const struct plugin *pl;              /* plugin that's playing this track */
  55   void *data;                           /* player data */
  56   long sofar;                           /* how much played so far */
  57   /* For DISORDER_PLAYER_PAUSES only: */
  58   time_t lastpaused, lastresumed;       /* when last paused/resumed, or 0 */
  59   long uptopause;                       /* how much played up to last pause */
  60   /* For Disobedience */
  61   struct queuelike *ql;                 /* owning queue */
  62 };
  63
  64 extern struct queue_entry qhead;
  65 /* queue of things yet to be played.  the head will be played
  66  * soonest. */
  67
  68 extern struct queue_entry phead;
  69 /* things that have been played in the past.  the head is the oldest. */
  70
  71 void queue_read(void);
  72 /* read the queue in.  Calls @fatal@ on error. */
  73
  74 void queue_write(void);
  75 /* write the queue out.  Calls @fatal@ on error. */
  76
  77 void recent_read(void);
  78 /* read the recently played list in.  Calls @fatal@ on error. */
  79
  80 void recent_write(void);
  81 /* write the recently played list out.  Calls @fatal@ on error. */
  82
  83 struct queue_entry *queue_add(const char *track, const char *submitter,
  84                               int where);
  85 #define WHERE_START 0                   /* Add to head of queue */
  86 #define WHERE_END 1                     /* Add to end of queue */
  87 #define WHERE_BEFORE_RANDOM 2           /* End, or before random track */
  88 /* add an entry to the queue.  Return a pointer to the new entry. */
  89
  90 void queue_remove(struct queue_entry *q, const char *who);
  91 /* remove an from the queue */
  92
  93 struct queue_entry *queue_find(const char *key);
  94 /* find a track in the queue by name or ID */
  95
  96 void queue_played(struct queue_entry *q);
  97 /* add @q@ to the played list */
  98
  99 int queue_unmarshall(struct queue_entry *q, const char *s,
 100                      void (*error_handler)(const char *, void *),
 101                      void *u);
 102 /* unmarshall UTF-8 string @s@ into @q@ */
 103
 104 int queue_unmarshall_vec(struct queue_entry *q, int nvec, char **vec,
 105                      void (*error_handler)(const char *, void *),
 106                      void *u);
 107 /* unmarshall pre-split string @vec@ into @q@ */
 108
 109 char *queue_marshall(const struct queue_entry *q);
 110 /* marshall @q@ into a UTF-8 string */
 111
 112 void queue_id(struct queue_entry *q);
 113 /* give @q@ an ID */
 114
 115 int queue_move(struct queue_entry *q, int delta, const char *who);
 116 /* move element @q@ in the queue towards the front (@delta@ > 0) or towards the
 117  * back (@delta@ < 0).  The return value is the leftover delta once we've hit
 118  * the end in whichever direction we were going. */
 119
 120 void queue_moveafter(struct queue_entry *target,
 121                      int nqs, struct queue_entry **qs, const char *who);
 122 /* Move all the elements QS to just after TARGET, or to the head if
 123  * TARGET=0. */
 124
 125 void queue_fix_sofar(struct queue_entry *q);
 126 /* Fix up the sofar field for standalone players */
 127
 128 #endif /* QUEUE_H */
 129
 130 /*
 131 Local Variables:
 132 c-basic-offset:2
 133 comment-column:40
 134 fill-column:79
 135 End:
 136 */
 137 /* arch-tag:23ec4c111fdd6573a0adc8c366b87e7b */