1 files changed, 301 insertions, 0 deletions
diff --git a/src/queue/Playlist.hxx b/src/queue/Playlist.hxx
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+++ b/src/queue/Playlist.hxx
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+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_PLAYLIST_HXX
+#define MPD_PLAYLIST_HXX
+
+#include "queue/Queue.hxx"
+#include "PlaylistError.hxx"
+
+enum TagType : uint8_t;
+struct PlayerControl;
+class DetachedSong;
+class Database;
+class Error;
+class SongLoader;
+class SongTime;
+class SignedSongTime;
+
+struct playlist {
+	/**
+	 * The song queue - it contains the "real" playlist.
+	 */
+	struct Queue queue;
+
+	/**
+	 * This value is true if the player is currently playing (or
+	 * should be playing).
+	 */
+	bool playing;
+
+	/**
+	 * If true, then any error is fatal; if false, MPD will
+	 * attempt to play the next song on non-fatal errors.  During
+	 * seeking, this flag is set.
+	 */
+	bool stop_on_error;
+
+	/**
+	 * If true, then a bulk edit has been initiated by
+	 * BeginBulk(), and UpdateQueuedSong() and OnModified() will
+	 * be postponed until CommitBulk()
+	 */
+	bool bulk_edit;
+
+	/**
+	 * Has the queue been modified during bulk edit mode?
+	 */
+	bool bulk_modified;
+
+	/**
+	 * Number of errors since playback was started.  If this
+	 * number exceeds the length of the playlist, MPD gives up,
+	 * because all songs have been tried.
+	 */
+	unsigned error_count;
+
+	/**
+	 * The "current song pointer".  This is the song which is
+	 * played when we get the "play" command.  It is also the song
+	 * which is currently being played.
+	 */
+	int current;
+
+	/**
+	 * The "next" song to be played, when the current one
+	 * finishes.  The decoder thread may start decoding and
+	 * buffering it, while the "current" song is still playing.
+	 *
+	 * This variable is only valid if #playing is true.
+	 */
+	int queued;
+
+	playlist(unsigned max_length)
+		:queue(max_length), playing(false),
+		 bulk_edit(false),
+		 current(-1), queued(-1) {
+	}
+
+	~playlist() {
+	}
+
+	uint32_t GetVersion() const {
+		return queue.version;
+	}
+
+	unsigned GetLength() const {
+		return queue.GetLength();
+	}
+
+	unsigned PositionToId(unsigned position) const {
+		return queue.PositionToId(position);
+	}
+
+	gcc_pure
+	int GetCurrentPosition() const;
+
+	gcc_pure
+	int GetNextPosition() const;
+
+	/**
+	 * Returns the song object which is currently queued.  Returns
+	 * none if there is none (yet?) or if MPD isn't playing.
+	 */
+	gcc_pure
+	const DetachedSong *GetQueuedSong() const;
+
+	/**
+	 * This is the "PLAYLIST" event handler.  It is invoked by the
+	 * player thread whenever it requests a new queued song, or
+	 * when it exits.
+	 */
+	void SyncWithPlayer(PlayerControl &pc);
+
+protected:
+	/**
+	 * Called by all editing methods after a modification.
+	 * Updates the queue version and emits #IDLE_PLAYLIST.
+	 */
+	void OnModified();
+
+	/**
+	 * Updates the "queued song".  Calculates the next song
+	 * according to the current one (if MPD isn't playing, it
+	 * takes the first song), and queues this song.  Clears the
+	 * old queued song if there was one.
+	 *
+	 * @param prev the song which was previously queued, as
+	 * determined by playlist_get_queued_song()
+	 */
+	void UpdateQueuedSong(PlayerControl &pc, const DetachedSong *prev);
+
+public:
+	void BeginBulk();
+	void CommitBulk(PlayerControl &pc);
+
+	void Clear(PlayerControl &pc);
+
+	/**
+	 * A tag in the play queue has been modified by the player
+	 * thread.  Apply the given song's tag to the current song if
+	 * the song matches.
+	 */
+	void TagModified(DetachedSong &&song);
+
+#ifdef ENABLE_DATABASE
+	/**
+	 * The database has been modified.  Pull all updates.
+	 */
+	void DatabaseModified(const Database &db);
+#endif
+
+	/**
+	 * @return the new song id or 0 on error
+	 */
+	unsigned AppendSong(PlayerControl &pc,
+			    DetachedSong &&song,
+			    Error &error);
+
+	/**
+	 * @return the new song id or 0 on error
+	 */
+	unsigned AppendURI(PlayerControl &pc,
+			   const SongLoader &loader,
+			   const char *uri_utf8,
+			   Error &error);
+
+protected:
+	void DeleteInternal(PlayerControl &pc,
+			    unsigned song, const DetachedSong **queued_p);
+
+public:
+	PlaylistResult DeletePosition(PlayerControl &pc,
+				      unsigned position);
+
+	PlaylistResult DeleteOrder(PlayerControl &pc,
+				   unsigned order) {
+		return DeletePosition(pc, queue.OrderToPosition(order));
+	}
+
+	PlaylistResult DeleteId(PlayerControl &pc, unsigned id);
+
+	/**
+	 * Deletes a range of songs from the playlist.
+	 *
+	 * @param start the position of the first song to delete
+	 * @param end the position after the last song to delete
+	 */
+	PlaylistResult DeleteRange(PlayerControl &pc,
+				   unsigned start, unsigned end);
+
+	void DeleteSong(PlayerControl &pc, const char *uri);
+
+	void Shuffle(PlayerControl &pc, unsigned start, unsigned end);
+
+	PlaylistResult MoveRange(PlayerControl &pc,
+				 unsigned start, unsigned end, int to);
+
+	PlaylistResult MoveId(PlayerControl &pc, unsigned id, int to);
+
+	PlaylistResult SwapPositions(PlayerControl &pc,
+				     unsigned song1, unsigned song2);
+
+	PlaylistResult SwapIds(PlayerControl &pc,
+			       unsigned id1, unsigned id2);
+
+	PlaylistResult SetPriorityRange(PlayerControl &pc,
+					unsigned start_position,
+					unsigned end_position,
+					uint8_t priority);
+
+	PlaylistResult SetPriorityId(PlayerControl &pc,
+				     unsigned song_id, uint8_t priority);
+
+	/**
+	 * Sets the start_time and end_time attributes on the song
+	 * with the specified id.
+	 */
+	bool SetSongIdRange(PlayerControl &pc, unsigned id,
+			    SongTime start, SongTime end,
+			    Error &error);
+
+	bool AddSongIdTag(unsigned id, TagType tag_type, const char *value,
+			  Error &error);
+	bool ClearSongIdTag(unsigned id, TagType tag_type, Error &error);
+
+	void Stop(PlayerControl &pc);
+
+	PlaylistResult PlayPosition(PlayerControl &pc, int position);
+
+	void PlayOrder(PlayerControl &pc, int order);
+
+	PlaylistResult PlayId(PlayerControl &pc, int id);
+
+	void PlayNext(PlayerControl &pc);
+
+	void PlayPrevious(PlayerControl &pc);
+
+	PlaylistResult SeekSongOrder(PlayerControl &pc,
+				     unsigned song_order,
+				     SongTime seek_time);
+
+	PlaylistResult SeekSongPosition(PlayerControl &pc,
+					unsigned song_position,
+					SongTime seek_time);
+
+	PlaylistResult SeekSongId(PlayerControl &pc,
+				  unsigned song_id, SongTime seek_time);
+
+	/**
+	 * Seek within the current song.  Fails if MPD is not currently
+	 * playing.
+	 *
+	 * @param time the time in seconds
+	 * @param relative if true, then the specified time is relative to the
+	 * current position
+	 */
+	PlaylistResult SeekCurrent(PlayerControl &pc,
+				   SignedSongTime seek_time, bool relative);
+
+	bool GetRepeat() const {
+		return queue.repeat;
+	}
+
+	void SetRepeat(PlayerControl &pc, bool new_value);
+
+	bool GetRandom() const {
+		return queue.random;
+	}
+
+	void SetRandom(PlayerControl &pc, bool new_value);
+
+	bool GetSingle() const {
+		return queue.single;
+	}
+
+	void SetSingle(PlayerControl &pc, bool new_value);
+
+	bool GetConsume() const {
+		return queue.consume;
+	}
+
+	void SetConsume(bool new_value);
+};
+
+#endif