mirror of
https://github.com/owntone/owntone-server.git
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68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
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#ifndef __LISTENER_H__
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#define __LISTENER_H__
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enum listener_event_type
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{
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/* The player has been started, stopped or seeked */
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LISTENER_PLAYER = (1 << 0),
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/* The current playback queue has been modified */
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LISTENER_QUEUE = (1 << 1),
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/* The volume has been changed */
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LISTENER_VOLUME = (1 << 2),
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/* Speaker status changes (enabled/disabled or verification status) */
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LISTENER_SPEAKER = (1 << 3),
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/* Options like repeat, random has been changed */
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LISTENER_OPTIONS = (1 << 4),
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/* The library has been modified */
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LISTENER_DATABASE = (1 << 5),
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/* A stored playlist has been modified (create, delete, add, rename) */
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LISTENER_STORED_PLAYLIST = (1 << 6),
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/* A library update has started or finished */
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LISTENER_UPDATE = (1 << 7),
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/* A pairing request has started or finished */
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LISTENER_PAIRING = (1 << 8),
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/* Spotify status changes (login, logout) */
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LISTENER_SPOTIFY = (1 << 9),
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/* Last.fm status changes (enable/disable scrobbling) */
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LISTENER_LASTFM = (1 << 10),
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/* Song rating changes */
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LISTENER_RATING = (1 << 11),
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};
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typedef void (*notify)(short event_mask);
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/*
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* Registers the given callback function to the given event types.
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* This function is not thread safe. Listeners must be added once at startup.
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*
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* @param notify_cb Callback function (should be a non-blocking function,
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* especially when the event is from the player)
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* @param event_mask Event mask, one or more of LISTENER_*
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* @return 0 on success, -1 on failure
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*/
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int
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listener_add(notify notify_cb, short event_mask);
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/*
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* Removes the given callback function
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* This function is not thread safe. Listeners must be removed once at shutdown.
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*
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* @param notify_cb Callback function
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* @return 0 on success, -1 if the callback was not registered
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*/
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int
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listener_remove(notify notify_cb);
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/*
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* Calls the callback function of the registered listeners listening for the
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* given type of event.
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*
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* @param event_mask Event mask, one or more of LISTENER_*
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*
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*/
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void
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listener_notify(short event_mask);
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#endif /* !__LISTENER_H__ */
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