player_control: removed the global variable "pc"

Allocate a player_control object where needed, and pass it around. Each "client" object is associated with a "player_control" instance. This prepares multi-player support.

player_control: removed the global variable "pc"
b6995ca0 · Max Kellermann · 715844fd · b6995ca0 · b6995ca0 · b6995ca0
Commit b6995ca0 authored Nov 03, 2009 by Max Kellermann
42 changed files
--- a/src/client.h
+++ b/src/client.h
@@ -27,11 +27,13 @@
 struct client;
 struct sockaddr;
+struct player_control;
 void client_manager_init(void);
 void client_manager_deinit(void);
-void client_new(int fd, const struct sockaddr *sa, size_t sa_length, int uid);
+void client_new(struct player_control *player_control,
+		int fd, const struct sockaddr *sa, size_t sa_length, int uid);
 bool client_is_expired(const struct client *client);

--- a/src/client_internal.h
+++ b/src/client_internal.h
@@ -32,6 +32,8 @@ struct deferred_buffer {
 };
 struct client {
+	struct player_control *player_control;
 	GIOChannel *channel;
 	guint source_id;

--- a/src/client_new.c
+++ b/src/client_new.c
@@ -41,12 +41,15 @@
 static const char GREETING[] = "OK MPD " PROTOCOL_VERSION "\n";
-void client_new(int fd, const struct sockaddr *sa, size_t sa_length, int uid)
+void
+client_new(struct player_control *player_control,
+	   int fd, const struct sockaddr *sa, size_t sa_length, int uid)
 {
 	static unsigned int next_client_num;
 	struct client *client;
 	char *remote;
+	assert(player_control != NULL);
 	assert(fd >= 0);
 #ifdef HAVE_LIBWRAP
@@ -81,6 +84,7 @@ void client_new(int fd, const struct sockaddr *sa, size_t sa_length, int uid)
 	}
 	client = g_new0(struct client, 1);
+	client->player_control = player_control;
 #ifndef G_OS_WIN32
 	client->channel = g_io_channel_unix_new(fd);

--- a/src/command.c
+++ b/src/command.c
--- a/src/dbUtils.c
+++ b/src/dbUtils.c
@@ -29,6 +29,7 @@
 #include "tag.h"
 #include "strset.h"
 #include "stored_playlist.h"
+#include "client_internal.h"
 #include <glib.h>
@@ -166,9 +167,11 @@ int printAllIn(struct client *client, const char *name)
 }
 static int
-directoryAddSongToPlaylist(struct song *song, G_GNUC_UNUSED void *data)
+directoryAddSongToPlaylist(struct song *song, void *data)
 {
-	return playlist_append_song(&g_playlist, song, NULL);
+	struct player_control *pc = data;
+	return playlist_append_song(&g_playlist, pc, song, NULL);
 }
 struct add_data {
@@ -185,9 +188,10 @@ directoryAddSongToStoredPlaylist(struct song *song, void *_data)
 	return 0;
 }
-int addAllIn(const char *name)
+int
+addAllIn(struct player_control *pc, const char *name)
 {
-	return db_walk(name, directoryAddSongToPlaylist, NULL, NULL);
+	return db_walk(name, directoryAddSongToPlaylist, NULL, pc);
 }
 int addAllInToStoredPlaylist(const char *name, const char *utf8file)
@@ -205,7 +209,9 @@ findAddInDirectory(struct song *song, void *_data)
 	struct search_data *data = _data;
 	if (locate_song_match(song, data->criteria))
-		return playlist_append_song(&g_playlist, song, NULL);
+		return playlist_append_song(&g_playlist,
+					    data->client->player_control,
+					    song, NULL);
 	return 0;
 }

--- a/src/dbUtils.h
+++ b/src/dbUtils.h
@@ -22,10 +22,12 @@
 struct client;
 struct locate_item_list;
+struct player_control;
 int printAllIn(struct client *client, const char *name);
-int addAllIn(const char *name);
+int
+addAllIn(struct player_control *pc, const char *name);
 int addAllInToStoredPlaylist(const char *name, const char *utf8file);

--- a/src/decoder_api.c
+++ b/src/decoder_api.c
@@ -65,7 +65,7 @@ decoder_initialized(struct decoder *decoder,
 	dc->state = DECODE_STATE_DECODE;
 	decoder_unlock(dc);
-	player_lock_signal();
+	player_lock_signal(dc->player_control);
 	g_debug("audio_format=%s, seekable=%s",
 		audio_format_to_string(&dc->in_audio_format, &af_string),
@@ -117,7 +117,7 @@ decoder_command_finished(struct decoder *decoder)
 	dc->command = DECODE_COMMAND_NONE;
 	decoder_unlock(dc);
-	player_lock_signal();
+	player_lock_signal(dc->player_control);
 }
 double decoder_seek_where(G_GNUC_UNUSED struct decoder * decoder)
@@ -214,7 +214,7 @@ do_send_tag(struct decoder *decoder, struct input_stream *is,
 		/* there is a partial chunk - flush it, we want the
 		   tag in a new chunk */
 		decoder_flush_chunk(decoder);
-		player_lock_signal();
+		player_lock_signal(decoder->dc->player_control);
 	}
 	assert(decoder->chunk == NULL);
@@ -329,7 +329,7 @@ decoder_data(struct decoder *decoder,
 		if (dest == NULL) {
 			/* the chunk is full, flush it */
 			decoder_flush_chunk(decoder);
-			player_lock_signal();
+			player_lock_signal(dc->player_control);
 			continue;
 		}
@@ -348,7 +348,7 @@ decoder_data(struct decoder *decoder,
 		if (full) {
 			/* the chunk is full, flush it */
 			decoder_flush_chunk(decoder);
-			player_lock_signal();
+			player_lock_signal(dc->player_control);
 		}
 		data += nbytes;
@@ -432,7 +432,7 @@ decoder_replay_gain(struct decoder *decoder,
 			   replay gain values affect the following
 			   samples */
 			decoder_flush_chunk(decoder);
-			player_lock_signal();
+			player_lock_signal(decoder->dc->player_control);
 		}
 	} else
 		decoder->replay_gain_serial = 0;

--- a/src/decoder_control.c
+++ b/src/decoder_control.c
@@ -28,8 +28,9 @@
 #define G_LOG_DOMAIN "decoder_control"
 void
-dc_init(struct decoder_control *dc)
+dc_init(struct decoder_control *dc, struct player_control *pc)
 {
+	dc->player_control = pc;
 	dc->thread = NULL;
 	dc->mutex = g_mutex_new();
@@ -62,7 +63,7 @@ static void
 dc_command_wait_locked(struct decoder_control *dc)
 {
 	while (dc->command != DECODE_COMMAND_NONE)
-		player_wait_decoder(dc);
+		player_wait_decoder(dc->player_control, dc);
 }
 void

--- a/src/decoder_control.h
+++ b/src/decoder_control.h
@@ -27,6 +27,8 @@
 #include <assert.h>
+struct player_control;
 enum decoder_state {
 	DECODE_STATE_STOP = 0,
 	DECODE_STATE_START,
@@ -42,6 +44,12 @@ enum decoder_state {
 };
 struct decoder_control {
+	/**
+	 * The player thread which calls us.  This pointer is used to
+	 * signal command completion.
+	 */
+	struct player_control *player_control;
 	/** the handle of the decoder thread, or NULL if the decoder
 	    thread isn't running */
 	GThread *thread;
@@ -98,7 +106,7 @@ struct decoder_control {
 };
 void
-dc_init(struct decoder_control *dc);
+dc_init(struct decoder_control *dc, struct player_control *pc);
 void
 dc_deinit(struct decoder_control *dc);

--- a/src/decoder_internal.c
+++ b/src/decoder_internal.c
@@ -65,7 +65,7 @@ need_chunks(struct decoder_control *dc, struct input_stream *is, bool do_wait)
 	if ((is == NULL || !decoder_input_buffer(dc, is)) && do_wait) {
 		decoder_wait(dc);
-		player_signal();
+		player_signal(dc->player_control);
 		return dc->command;
 	}

--- a/src/decoder_thread.c
+++ b/src/decoder_thread.c
@@ -383,7 +383,7 @@ decoder_run_song(struct decoder_control *dc,
 	dc->state = DECODE_STATE_START;
 	dc->command = DECODE_COMMAND_NONE;
-	player_signal();
+	player_signal(dc->player_control);
 	pcm_convert_init(&decoder.conv_state);
@@ -464,13 +464,13 @@ decoder_task(gpointer arg)
 			dc->command = DECODE_COMMAND_NONE;
-			player_signal();
+			player_signal(dc->player_control);
 			break;
 		case DECODE_COMMAND_STOP:
 			dc->command = DECODE_COMMAND_NONE;
-			player_signal();
+			player_signal(dc->player_control);
 			break;
 		case DECODE_COMMAND_NONE:

--- a/src/listen.c
+++ b/src/listen.c
@@ -23,6 +23,7 @@
 #include "client.h"
 #include "conf.h"
 #include "glib_compat.h"
+#include "main.h"
 #include <string.h>
 #include <assert.h>
@@ -39,7 +40,7 @@ static void
 listen_callback(int fd, const struct sockaddr *address,
 		size_t address_length, int uid, G_GNUC_UNUSED void *ctx)
 {
-	client_new(fd, address, address_length, uid);
+	client_new(global_player_control, fd, address, address_length, uid);
 }
 static bool

--- a/src/main.c
+++ b/src/main.c
@@ -94,6 +94,8 @@ GMainLoop *main_loop;
 GCond *main_cond;
+struct player_control *global_player_control;
 static void
 glue_daemonize_init(const struct options *options)
 {
@@ -183,7 +185,8 @@ glue_sticker_init(void)
 static void
 glue_state_file_init(void)
 {
-	state_file_init(config_get_path(CONF_STATE_FILE));
+	state_file_init(config_get_path(CONF_STATE_FILE),
+			global_player_control);
 }
 /**
@@ -254,7 +257,7 @@ initialize_decoder_and_player(void)
 	if (buffered_before_play > buffered_chunks)
 		buffered_before_play = buffered_chunks;
-	pc_init(buffered_chunks, buffered_before_play);
+	global_player_control = pc_new(buffered_chunks, buffered_before_play);
 }
 /**
@@ -364,7 +367,7 @@ int mpd_main(int argc, char *argv[])
 	initialize_decoder_and_player();
 	volume_init();
 	initAudioConfig();
-	audio_output_all_init();
+	audio_output_all_init(global_player_control);
 	client_manager_init();
 	replay_gain_global_init();
@@ -384,7 +387,7 @@ int mpd_main(int argc, char *argv[])
 	initZeroconf();
-	player_create();
+	player_create(global_player_control);
 	if (create_db) {
 		/* the database failed to load: recreate the
@@ -410,7 +413,7 @@ int mpd_main(int argc, char *argv[])
 	/* enable all audio outputs (if not already done by
 	   playlist_state_restore() */
-	pc_update_audio();
+	pc_update_audio(global_player_control);
 #ifdef WIN32
 	win32_app_started();
@@ -431,8 +434,8 @@ int mpd_main(int argc, char *argv[])
 	mpd_inotify_finish();
 #endif
-	state_file_finish();
+	state_file_finish(global_player_control);
-	pc_kill();
+	pc_kill(global_player_control);
 	finishZeroconf();
 	client_manager_deinit();
 	listen_global_finish();
@@ -457,7 +460,7 @@ int mpd_main(int argc, char *argv[])
 	mapper_finish();
 	path_global_finish();
 	finishPermissions();
-	pc_deinit();
+	pc_free(global_player_control);
 	command_finish();
 	update_global_finish();
 	decoder_plugin_deinit_all();

--- a/src/main.h
+++ b/src/main.h
@@ -28,6 +28,8 @@ extern GMainLoop *main_loop;
 extern GCond *main_cond;
+extern struct player_control *global_player_control;
 /**
 * A entry point for application.
 * On non-Windows platforms this is called directly from main()

--- a/src/output_all.c
+++ b/src/output_all.c
@@ -100,7 +100,7 @@ audio_output_config_count(void)
 }
 void
-audio_output_all_init(void)
+audio_output_all_init(struct player_control *pc)
 {
 	const struct config_param *param = NULL;
 	unsigned int i;
@@ -121,7 +121,7 @@ audio_output_all_init(void)
 		/* only allow param to be NULL if there just one audioOutput */
 		assert(param || (num_audio_outputs == 1));
-		if (!audio_output_init(output, param, &error)) {
+		if (!audio_output_init(output, param, pc, &error)) {
 			if (param != NULL)
 				MPD_ERROR("line %i: %s",
 					  param->line, error->message);
@@ -473,17 +473,17 @@ audio_output_all_check(void)
 }
 bool
-audio_output_all_wait(unsigned threshold)
+audio_output_all_wait(struct player_control *pc, unsigned threshold)
 {
-	player_lock();
+	player_lock(pc);
 	if (audio_output_all_check() < threshold) {
-		player_unlock();
+		player_unlock(pc);
 		return true;
 	}
-	player_wait();
+	player_wait(pc);
-	player_unlock();
+	player_unlock(pc);
 	return audio_output_all_check() < threshold;
 }

--- a/src/output_all.h
+++ b/src/output_all.h
@@ -32,13 +32,14 @@
 struct audio_format;
 struct music_buffer;
 struct music_chunk;
+struct player_control;
 /**
 * Global initialization: load audio outputs from the configuration
 * file and initialize them.
 */
 void
-audio_output_all_init(void);
+audio_output_all_init(struct player_control *pc);
 /**
 * Global finalization: free memory occupied by audio outputs.  All
@@ -127,7 +128,7 @@ audio_output_all_check(void);
 * @return true if there are less than #threshold chunks in the pipe
 */
 bool
-audio_output_all_wait(unsigned threshold);
+audio_output_all_wait(struct player_control *pc, unsigned threshold);
 /**
 * Puts all audio outputs into pause mode.  Most implementations will

--- a/src/output_command.c
+++ b/src/output_command.c
@@ -50,7 +50,7 @@ audio_output_enable_index(unsigned idx)
 	ao->enabled = true;
 	idle_add(IDLE_OUTPUT);
-	pc_update_audio();
+	pc_update_audio(ao->player_control);
 	++audio_output_state_version;
@@ -79,7 +79,7 @@ audio_output_disable_index(unsigned idx)
 		idle_add(IDLE_MIXER);
 	}
-	pc_update_audio();
+	pc_update_audio(ao->player_control);
 	++audio_output_state_version;

--- a/src/output_control.h
+++ b/src/output_control.h
@@ -29,6 +29,7 @@ struct audio_output;
 struct audio_format;
 struct config_param;
 struct music_pipe;
+struct player_control;
 static inline GQuark
 audio_output_quark(void)
@@ -38,6 +39,7 @@ audio_output_quark(void)
 bool
 audio_output_init(struct audio_output *ao, const struct config_param *param,
+		  struct player_control *pc,
 		  GError **error_r);
 /**

--- a/src/output_init.c
+++ b/src/output_init.c
@@ -127,8 +127,12 @@ audio_output_load_mixer(void *ao, const struct config_param *param,
 bool
 audio_output_init(struct audio_output *ao, const struct config_param *param,
+		  struct player_control *pc,
 		  GError **error_r)
 {
+	assert(ao != NULL);
+	assert(pc != NULL);
 	const struct audio_output_plugin *plugin = NULL;
 	GError *error = NULL;
@@ -249,6 +253,7 @@ audio_output_init(struct audio_output *ao, const struct config_param *param,
 	ao->command = AO_COMMAND_NONE;
 	ao->mutex = g_mutex_new();
 	ao->cond = g_cond_new();
+	ao->player_control = pc;
 	ao->data = ao_plugin_init(plugin,
 				  &ao->config_audio_format,

--- a/src/output_internal.h
+++ b/src/output_internal.h
@@ -208,6 +208,12 @@ struct audio_output {
 	GCond *cond;
 	/**
+	 * The player_control object which "owns" this output.  This
+	 * object is needed to signal command completion.
+	 */
+	struct player_control *player_control;
+	/**
 	 * The #music_chunk which is currently being played.  All
 	 * chunks before this one may be returned to the
 	 * #music_buffer, because they are not going to be used by

--- a/src/output_thread.c
+++ b/src/output_thread.c
@@ -530,7 +530,7 @@ ao_play(struct audio_output *ao)
 	ao->chunk_finished = true;
 	g_mutex_unlock(ao->mutex);
-	player_lock_signal();
+	player_lock_signal(ao->player_control);
 	g_mutex_lock(ao->mutex);
 	return true;

--- a/src/player_control.c
+++ b/src/player_control.c
--- a/src/player_control.h
+++ b/src/player_control.h
@@ -116,28 +116,28 @@ struct player_control {
 	double total_play_time;
 };
-extern struct player_control pc;
+struct player_control *
+pc_new(unsigned buffer_chunks, unsigned buffered_before_play);
-void pc_init(unsigned buffer_chunks, unsigned buffered_before_play);
+void
+pc_free(struct player_control *pc);
-void pc_deinit(void);
 /**
 * Locks the #player_control object.
 */
 static inline void
-player_lock(void)
+player_lock(struct player_control *pc)
 {
-	g_mutex_lock(pc.mutex);
+	g_mutex_lock(pc->mutex);
 }
 /**
 * Unlocks the #player_control object.
 */
 static inline void
-player_unlock(void)
+player_unlock(struct player_control *pc)
 {
-	g_mutex_unlock(pc.mutex);
+	g_mutex_unlock(pc->mutex);
 }
 /**
@@ -146,9 +146,9 @@ player_unlock(void)
 * to calling this function.
 */
 static inline void
-player_wait(void)
+player_wait(struct player_control *pc)
 {
-	g_cond_wait(pc.cond, pc.mutex);
+	g_cond_wait(pc->cond, pc->mutex);
 }
 /**
@@ -159,16 +159,16 @@ player_wait(void)
 * Note the small difference to the player_wait() function!
 */
 void
-player_wait_decoder(struct decoder_control *dc);
+player_wait_decoder(struct player_control *pc, struct decoder_control *dc);
 /**
 * Signals the #player_control object.  The object should be locked
 * prior to calling this function.
 */
 static inline void
-player_signal(void)
+player_signal(struct player_control *pc)
 {
-	g_cond_signal(pc.cond);
+	g_cond_signal(pc->cond);
 }
 /**
@@ -176,11 +176,11 @@ player_signal(void)
 * locked by this function.
 */
 static inline void
-player_lock_signal(void)
+player_lock_signal(struct player_control *pc)
 {
-	player_lock();
+	player_lock(pc);
-	player_signal();
+	player_signal(pc);
-	player_unlock();
+	player_unlock(pc);
 }
 /**
@@ -189,33 +189,34 @@ player_lock_signal(void)
 * not point to an invalid pointer.
 */
 void
-pc_song_deleted(const struct song *song);
+pc_song_deleted(struct player_control *pc, const struct song *song);
 void
-pc_play(struct song *song);
+pc_play(struct player_control *pc, struct song *song);
 /**
 * see PLAYER_COMMAND_CANCEL
 */
-void pc_cancel(void);
+void
+pc_cancel(struct player_control *pc);
 void
-pc_set_pause(bool pause_flag);
+pc_set_pause(struct player_control *pc, bool pause_flag);
 void
-pc_pause(void);
+pc_pause(struct player_control *pc);
 void
-pc_kill(void);
+pc_kill(struct player_control *pc);
 void
-pc_get_status(struct player_status *status);
+pc_get_status(struct player_control *pc, struct player_status *status);
 enum player_state
-pc_get_state(void);
+pc_get_state(struct player_control *pc);
 void
-pc_clear_error(void);
+pc_clear_error(struct player_control *pc);
 /**
 * Returns the human-readable message describing the last error during
@@ -223,19 +224,19 @@ pc_clear_error(void);
 * returned string.
 */
 char *
-pc_get_error_message(void);
+pc_get_error_message(struct player_control *pc);
 enum player_error
-pc_get_error(void);
+pc_get_error(struct player_control *pc);
 void
-pc_stop(void);
+pc_stop(struct player_control *pc);
 void
-pc_update_audio(void);
+pc_update_audio(struct player_control *pc);
 void
-pc_enqueue_song(struct song *song);
+pc_enqueue_song(struct player_control *pc, struct song *song);
 /**
 * Makes the player thread seek the specified song to a position.
@@ -244,27 +245,27 @@ pc_enqueue_song(struct song *song);
 * playing currently)
 */
 bool
-pc_seek(struct song *song, float seek_time);
+pc_seek(struct player_control *pc, struct song *song, float seek_time);
 void
-pc_set_cross_fade(float cross_fade_seconds);
+pc_set_cross_fade(struct player_control *pc, float cross_fade_seconds);
 float
-pc_get_cross_fade(void);
+pc_get_cross_fade(const struct player_control *pc);
 void
-pc_set_mixramp_db(float mixramp_db);
+pc_set_mixramp_db(struct player_control *pc, float mixramp_db);
 float
-pc_get_mixramp_db(void);
+pc_get_mixramp_db(const struct player_control *pc);
 void
-pc_set_mixramp_delay(float mixramp_delay_seconds);
+pc_set_mixramp_delay(struct player_control *pc, float mixramp_delay_seconds);
 float
-pc_get_mixramp_delay(void);
+pc_get_mixramp_delay(const struct player_control *pc);
 double
-pc_get_total_play_time(void);
+pc_get_total_play_time(const struct player_control *pc);
 #endif
--- a/src/player_thread.c
+++ b/src/player_thread.c
--- a/src/player_thread.h
+++ b/src/player_thread.h
@@ -37,6 +37,9 @@
 #ifndef MPD_PLAYER_THREAD_H
 #define MPD_PLAYER_THREAD_H
-void player_create(void);
+struct player_control;
+void
+player_create(struct player_control *pc);
 #endif
--- a/src/playlist.c
+++ b/src/playlist.c
@@ -75,7 +75,8 @@ playlist_finish(struct playlist *playlist)
 * Queue a song, addressed by its order number.
 */
 static void
-playlist_queue_song_order(struct playlist *playlist, unsigned order)
+playlist_queue_song_order(struct playlist *playlist, struct player_control *pc,
+			  unsigned order)
 {
 	struct song *song;
 	char *uri;
@@ -89,16 +90,16 @@ playlist_queue_song_order(struct playlist *playlist, unsigned order)
 	g_debug("queue song %i:\"%s\"", playlist->queued, uri);
 	g_free(uri);
-	pc_enqueue_song(song);
+	pc_enqueue_song(pc, song);
 }
 /**
 * Called if the player thread has started playing the "queued" song.
 */
 static void
-playlist_song_started(struct playlist *playlist)
+playlist_song_started(struct playlist *playlist, struct player_control *pc)
 {
-	assert(pc.next_song == NULL);
+	assert(pc->next_song == NULL);
 	assert(playlist->queued >= -1);
 	/* queued song has started: copy queued to current,
@@ -110,11 +111,13 @@ playlist_song_started(struct playlist *playlist)
 	/* Pause if we are in single mode. */
 	if(playlist->queue.single && !playlist->queue.repeat) {
-		pc_set_pause(true);
+		pc_set_pause(pc, true);
 	}
 	if(playlist->queue.consume)
-		playlist_delete(playlist, queue_order_to_position(&playlist->queue, current));
+		playlist_delete(playlist, pc,
+				queue_order_to_position(&playlist->queue,
+							current));
 	idle_add(IDLE_PLAYER);
 }
@@ -129,7 +132,9 @@ playlist_get_queued_song(struct playlist *playlist)
 }
 void
-playlist_update_queued_song(struct playlist *playlist, const struct song *prev)
+playlist_update_queued_song(struct playlist *playlist,
+			    struct player_control *pc,
+			    const struct song *prev)
 {
 	int next_order;
 	const struct song *next_song;
@@ -170,20 +175,21 @@ playlist_update_queued_song(struct playlist *playlist, const struct song *prev)
 	if (prev != NULL && next_song != prev) {
 		/* clear the currently queued song */
-		pc_cancel();
+		pc_cancel(pc);
 		playlist->queued = -1;
 	}
 	if (next_order >= 0) {
 		if (next_song != prev)
-			playlist_queue_song_order(playlist, next_order);
+			playlist_queue_song_order(playlist, pc, next_order);
 		else
 			playlist->queued = next_order;
 	}
 }
 void
-playlist_play_order(struct playlist *playlist, int orderNum)
+playlist_play_order(struct playlist *playlist, struct player_control *pc,
+		    int orderNum)
 {
 	struct song *song;
 	char *uri;
@@ -197,46 +203,46 @@ playlist_play_order(struct playlist *playlist, int orderNum)
 	g_debug("play %i:\"%s\"", orderNum, uri);
 	g_free(uri);
-	pc_play(song);
+	pc_play(pc, song);
 	playlist->current = orderNum;
 }
 static void
-playlist_resume_playback(struct playlist *playlist);
+playlist_resume_playback(struct playlist *playlist, struct player_control *pc);
 /**
 * 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
-playlist_sync(struct playlist *playlist)
+playlist_sync(struct playlist *playlist, struct player_control *pc)
 {
 	if (!playlist->playing)
 		/* this event has reached us out of sync: we aren't
 		   playing anymore; ignore the event */
 		return;
-	player_lock();
+	player_lock(pc);
-	enum player_state pc_state = pc_get_state();
+	enum player_state pc_state = pc_get_state(pc);
-	const struct song *pc_next_song = pc.next_song;
+	const struct song *pc_next_song = pc->next_song;
-	player_unlock();
+	player_unlock(pc);
 	if (pc_state == PLAYER_STATE_STOP)
 		/* the player thread has stopped: check if playback
 		   should be restarted with the next song.  That can
 		   happen if the playlist isn't filling the queue fast
 		   enough */
-		playlist_resume_playback(playlist);
+		playlist_resume_playback(playlist, pc);
 	else {
 		/* check if the player thread has already started
 		   playing the queued song */
 		if (pc_next_song == NULL && playlist->queued != -1)
-			playlist_song_started(playlist);
+			playlist_song_started(playlist, pc);
 		/* make sure the queued song is always set (if
 		   possible) */
-		if (pc.next_song == NULL && playlist->queued < 0)
+		if (pc->next_song == NULL && playlist->queued < 0)
-			playlist_update_queued_song(playlist, NULL);
+			playlist_update_queued_song(playlist, pc, NULL);
 	}
 }
@@ -245,14 +251,14 @@ playlist_sync(struct playlist *playlist)
 * decide whether to re-start playback
 */
 static void
-playlist_resume_playback(struct playlist *playlist)
+playlist_resume_playback(struct playlist *playlist, struct player_control *pc)
 {
 	enum player_error error;
 	assert(playlist->playing);
-	assert(pc_get_state() == PLAYER_STATE_STOP);
+	assert(pc_get_state(pc) == PLAYER_STATE_STOP);
-	error = pc_get_error();
+	error = pc_get_error(pc);
 	if (error == PLAYER_ERROR_NOERROR)
 		playlist->error_count = 0;
 	else
@@ -263,10 +269,10 @@ playlist_resume_playback(struct playlist *playlist)
 	    playlist->error_count >= queue_length(&playlist->queue))
 		/* too many errors, or critical error: stop
 		   playback */
-		playlist_stop(playlist);
+		playlist_stop(playlist, pc);
 	else
 		/* continue playback at the next song */
-		playlist_next(playlist);
+		playlist_next(playlist, pc);
 }
 bool
@@ -294,7 +300,8 @@ playlist_get_consume(const struct playlist *playlist)
 }
 void
-playlist_set_repeat(struct playlist *playlist, bool status)
+playlist_set_repeat(struct playlist *playlist, struct player_control *pc,
+		    bool status)
 {
 	if (status == playlist->queue.repeat)
 		return;
@@ -303,7 +310,7 @@ playlist_set_repeat(struct playlist *playlist, bool status)
 	/* if the last song is currently being played, the "next song"
 	   might change when repeat mode is toggled */
-	playlist_update_queued_song(playlist,
+	playlist_update_queued_song(playlist, pc,
 				    playlist_get_queued_song(playlist));
 	idle_add(IDLE_OPTIONS);
@@ -321,7 +328,8 @@ playlist_order(struct playlist *playlist)
 }
 void
-playlist_set_single(struct playlist *playlist, bool status)
+playlist_set_single(struct playlist *playlist, struct player_control *pc,
+		    bool status)
 {
 	if (status == playlist->queue.single)
 		return;
@@ -330,7 +338,7 @@ playlist_set_single(struct playlist *playlist, bool status)
 	/* if the last song is currently being played, the "next song"
 	   might change when single mode is toggled */
-	playlist_update_queued_song(playlist,
+	playlist_update_queued_song(playlist, pc,
 				    playlist_get_queued_song(playlist));
 	idle_add(IDLE_OPTIONS);
@@ -347,7 +355,8 @@ playlist_set_consume(struct playlist *playlist, bool status)
 }
 void
-playlist_set_random(struct playlist *playlist, bool status)
+playlist_set_random(struct playlist *playlist, struct player_control *pc,
+		    bool status)
 {
 	const struct song *queued;
@@ -384,7 +393,7 @@ playlist_set_random(struct playlist *playlist, bool status)
 	} else
 		playlist_order(playlist);
-	playlist_update_queued_song(playlist, queued);
+	playlist_update_queued_song(playlist, pc, queued);
 	idle_add(IDLE_OPTIONS);
 }

--- a/src/playlist.h
+++ b/src/playlist.h
@@ -26,6 +26,8 @@
 #define PLAYLIST_COMMENT	'#'
+struct player_control;
 enum playlist_result {
 	PLAYLIST_RESULT_SUCCESS,
 	PLAYLIST_RESULT_ERRNO,
@@ -111,7 +113,7 @@ playlist_get_queue(const struct playlist *playlist)
 }
 void
-playlist_clear(struct playlist *playlist);
+playlist_clear(struct playlist *playlist, struct player_control *pc);
 #ifndef WIN32
 /**
@@ -119,20 +121,21 @@ playlist_clear(struct playlist *playlist);
 * but only if the file's owner is equal to the specified uid.
 */
 enum playlist_result
-playlist_append_file(struct playlist *playlist, const char *path, int uid,
+playlist_append_file(struct playlist *playlist, struct player_control *pc,
-		     unsigned *added_id);
+		     const char *path, int uid, unsigned *added_id);
 #endif
 enum playlist_result
-playlist_append_uri(struct playlist *playlist, const char *file,
+playlist_append_uri(struct playlist *playlist, struct player_control *pc,
-		    unsigned *added_id);
+		    const char *file, unsigned *added_id);
 enum playlist_result
-playlist_append_song(struct playlist *playlist,
+playlist_append_song(struct playlist *playlist, struct player_control *pc,
 		  struct song *song, unsigned *added_id);
 enum playlist_result
-playlist_delete(struct playlist *playlist, unsigned song);
+playlist_delete(struct playlist *playlist, struct player_control *pc,
+		unsigned song);
 /**
 * Deletes a range of songs from the playlist.
@@ -141,64 +144,77 @@ playlist_delete(struct playlist *playlist, unsigned song);
 * @param end the position after the last song to delete
 */
 enum playlist_result
-playlist_delete_range(struct playlist *playlist, unsigned start, unsigned end);
+playlist_delete_range(struct playlist *playlist, struct player_control *pc,
+		      unsigned start, unsigned end);
 enum playlist_result
-playlist_delete_id(struct playlist *playlist, unsigned song);
+playlist_delete_id(struct playlist *playlist, struct player_control *pc,
+		   unsigned song);
 void
-playlist_stop(struct playlist *playlist);
+playlist_stop(struct playlist *playlist, struct player_control *pc);
 enum playlist_result
-playlist_play(struct playlist *playlist, int song);
+playlist_play(struct playlist *playlist, struct player_control *pc,
+	      int song);
 enum playlist_result
-playlist_play_id(struct playlist *playlist, int song);
+playlist_play_id(struct playlist *playlist, struct player_control *pc,
+		 int song);
 void
-playlist_next(struct playlist *playlist);
+playlist_next(struct playlist *playlist, struct player_control *pc);
 void
-playlist_sync(struct playlist *playlist);
+playlist_sync(struct playlist *playlist, struct player_control *pc);
 void
-playlist_previous(struct playlist *playlist);
+playlist_previous(struct playlist *playlist, struct player_control *pc);
 void
-playlist_shuffle(struct playlist *playlist, unsigned start, unsigned end);
+playlist_shuffle(struct playlist *playlist, struct player_control *pc,
+		 unsigned start, unsigned end);
 void
-playlist_delete_song(struct playlist *playlist, const struct song *song);
+playlist_delete_song(struct playlist *playlist, struct player_control *pc,
+		     const struct song *song);
 enum playlist_result
-playlist_move_range(struct playlist *playlist, unsigned start, unsigned end, int to);
+playlist_move_range(struct playlist *playlist, struct player_control *pc,
+		    unsigned start, unsigned end, int to);
 enum playlist_result
-playlist_move_id(struct playlist *playlist, unsigned id, int to);
+playlist_move_id(struct playlist *playlist, struct player_control *pc,
+		 unsigned id, int to);
 enum playlist_result
-playlist_swap_songs(struct playlist *playlist, unsigned song1, unsigned song2);
+playlist_swap_songs(struct playlist *playlist, struct player_control *pc,
+		    unsigned song1, unsigned song2);
 enum playlist_result
-playlist_swap_songs_id(struct playlist *playlist, unsigned id1, unsigned id2);
+playlist_swap_songs_id(struct playlist *playlist, struct player_control *pc,
+		       unsigned id1, unsigned id2);
 bool
 playlist_get_repeat(const struct playlist *playlist);
 void
-playlist_set_repeat(struct playlist *playlist, bool status);
+playlist_set_repeat(struct playlist *playlist, struct player_control *pc,
+		    bool status);
 bool
 playlist_get_random(const struct playlist *playlist);
 void
-playlist_set_random(struct playlist *playlist, bool status);
+playlist_set_random(struct playlist *playlist, struct player_control *pc,
+		    bool status);
 bool
 playlist_get_single(const struct playlist *playlist);
 void
-playlist_set_single(struct playlist *playlist, bool status);
+playlist_set_single(struct playlist *playlist, struct player_control *pc,
+		    bool status);
 bool
 playlist_get_consume(const struct playlist *playlist);
@@ -222,10 +238,11 @@ unsigned long
 playlist_get_version(const struct playlist *playlist);
 enum playlist_result
-playlist_seek_song(struct playlist *playlist, unsigned song, float seek_time);
+playlist_seek_song(struct playlist *playlist, struct player_control *pc,
+		   unsigned song, float seek_time);
 enum playlist_result
-playlist_seek_song_id(struct playlist *playlist,
+playlist_seek_song_id(struct playlist *playlist, struct player_control *pc,
 		       unsigned id, float seek_time);
 void

--- a/src/playlist_control.c
+++ b/src/playlist_control.c
@@ -32,7 +32,8 @@
 #undef G_LOG_DOMAIN
 #define G_LOG_DOMAIN "playlist"
-void playlist_stop(struct playlist *playlist)
+void
+playlist_stop(struct playlist *playlist, struct player_control *pc)
 {
 	if (!playlist->playing)
 		return;
@@ -40,7 +41,7 @@ void playlist_stop(struct playlist *playlist)
 	assert(playlist->current >= 0);
 	g_debug("stop");
-	pc_stop();
+	pc_stop(pc);
 	playlist->queued = -1;
 	playlist->playing = false;
@@ -62,11 +63,13 @@ void playlist_stop(struct playlist *playlist)
 	}
 }
-enum playlist_result playlist_play(struct playlist *playlist, int song)
+enum playlist_result
+playlist_play(struct playlist *playlist, struct player_control *pc,
+	      int song)
 {
 	unsigned i = song;
-	pc_clear_error();
+	pc_clear_error(pc);
 	if (song == -1) {
 		/* play any song ("current" song, or the first song */
@@ -77,7 +80,7 @@ enum playlist_result playlist_play(struct playlist *playlist, int song)
 		if (playlist->playing) {
 			/* already playing: unpause playback, just in
 			   case it was paused, and return */
-			pc_set_pause(false);
+			pc_set_pause(pc, false);
 			return PLAYLIST_RESULT_SUCCESS;
 		}
@@ -109,28 +112,29 @@ enum playlist_result playlist_play(struct playlist *playlist, int song)
 	playlist->stop_on_error = false;
 	playlist->error_count = 0;
-	playlist_play_order(playlist, i);
+	playlist_play_order(playlist, pc, i);
 	return PLAYLIST_RESULT_SUCCESS;
 }
 enum playlist_result
-playlist_play_id(struct playlist *playlist, int id)
+playlist_play_id(struct playlist *playlist, struct player_control *pc,
+		 int id)
 {
 	int song;
 	if (id == -1) {
-		return playlist_play(playlist, id);
+		return playlist_play(playlist, pc, id);
 	}
 	song = queue_id_to_position(&playlist->queue, id);
 	if (song < 0)
 		return PLAYLIST_RESULT_NO_SUCH_SONG;
-	return playlist_play(playlist, song);
+	return playlist_play(playlist, pc, song);
 }
 void
-playlist_next(struct playlist *playlist)
+playlist_next(struct playlist *playlist, struct player_control *pc)
 {
 	int next_order;
 	int current;
@@ -149,7 +153,7 @@ playlist_next(struct playlist *playlist)
 	next_order = queue_next_order(&playlist->queue, playlist->current);
 	if (next_order < 0) {
 		/* no song after this one: stop playback */
-		playlist_stop(playlist);
+		playlist_stop(playlist, pc);
 		/* reset "current song" */
 		playlist->current = -1;
@@ -170,15 +174,18 @@ playlist_next(struct playlist *playlist)
 			   discard them anyway */
 		}
-		playlist_play_order(playlist, next_order);
+		playlist_play_order(playlist, pc, next_order);
 	}
 	/* Consume mode removes each played songs. */
 	if(playlist->queue.consume)
-		playlist_delete(playlist, queue_order_to_position(&playlist->queue, current));
+		playlist_delete(playlist, pc,
+				queue_order_to_position(&playlist->queue,
+							current));
 }
-void playlist_previous(struct playlist *playlist)
+void
+playlist_previous(struct playlist *playlist, struct player_control *pc)
 {
 	if (!playlist->playing)
 		return;
@@ -187,21 +194,22 @@ void playlist_previous(struct playlist *playlist)
 	if (playlist->current > 0) {
 		/* play the preceding song */
-		playlist_play_order(playlist,
+		playlist_play_order(playlist, pc,
 				    playlist->current - 1);
 	} else if (playlist->queue.repeat) {
 		/* play the last song in "repeat" mode */
-		playlist_play_order(playlist,
+		playlist_play_order(playlist, pc,
 				    queue_length(&playlist->queue) - 1);
 	} else {
 		/* re-start playing the current song if it's
 		   the first one */
-		playlist_play_order(playlist, playlist->current);
+		playlist_play_order(playlist, pc, playlist->current);
 	}
 }
 enum playlist_result
-playlist_seek_song(struct playlist *playlist, unsigned song, float seek_time)
+playlist_seek_song(struct playlist *playlist, struct player_control *pc,
+		   unsigned song, float seek_time)
 {
 	const struct song *queued;
 	unsigned i;
@@ -217,7 +225,7 @@ playlist_seek_song(struct playlist *playlist, unsigned song, float seek_time)
 	else
 		i = song;
-	pc_clear_error();
+	pc_clear_error(pc);
 	playlist->stop_on_error = true;
 	playlist->error_count = 0;
@@ -225,29 +233,30 @@ playlist_seek_song(struct playlist *playlist, unsigned song, float seek_time)
 		/* seeking is not within the current song - first
 		   start playing the new song */
-		playlist_play_order(playlist, i);
+		playlist_play_order(playlist, pc, i);
 		queued = NULL;
 	}
-	success = pc_seek(queue_get_order(&playlist->queue, i), seek_time);
+	success = pc_seek(pc, queue_get_order(&playlist->queue, i), seek_time);
 	if (!success) {
-		playlist_update_queued_song(playlist, queued);
+		playlist_update_queued_song(playlist, pc, queued);
 		return PLAYLIST_RESULT_NOT_PLAYING;
 	}
 	playlist->queued = -1;
-	playlist_update_queued_song(playlist, NULL);
+	playlist_update_queued_song(playlist, pc, NULL);
 	return PLAYLIST_RESULT_SUCCESS;
 }
 enum playlist_result
-playlist_seek_song_id(struct playlist *playlist, unsigned id, float seek_time)
+playlist_seek_song_id(struct playlist *playlist, struct player_control *pc,
+		      unsigned id, float seek_time)
 {
 	int song = queue_id_to_position(&playlist->queue, id);
 	if (song < 0)
 		return PLAYLIST_RESULT_NO_SUCH_SONG;
-	return playlist_seek_song(playlist, song, seek_time);
+	return playlist_seek_song(playlist, pc, song, seek_time);
 }
--- a/src/playlist_edit.c
+++ b/src/playlist_edit.c
@@ -43,16 +43,17 @@ static void playlist_increment_version(struct playlist *playlist)
 	idle_add(IDLE_PLAYLIST);
 }
-void playlist_clear(struct playlist *playlist)
+void
+playlist_clear(struct playlist *playlist, struct player_control *pc)
 {
-	playlist_stop(playlist);
+	playlist_stop(playlist, pc);
 	/* make sure there are no references to allocated songs
 	   anymore */
 	for (unsigned i = 0; i < queue_length(&playlist->queue); i++) {
 		const struct song *song = queue_get(&playlist->queue, i);
 		if (!song_in_database(song))
-			pc_song_deleted(song);
+			pc_song_deleted(pc, song);
 	}
 	queue_clear(&playlist->queue);
@@ -64,8 +65,8 @@ void playlist_clear(struct playlist *playlist)
 #ifndef WIN32
 enum playlist_result
-playlist_append_file(struct playlist *playlist, const char *path, int uid,
+playlist_append_file(struct playlist *playlist, struct player_control *pc,
-		     unsigned *added_id)
+		     const char *path, int uid, unsigned *added_id)
 {
 	int ret;
 	struct stat st;
@@ -87,12 +88,12 @@ playlist_append_file(struct playlist *playlist, const char *path, int uid,
 	if (song == NULL)
 		return PLAYLIST_RESULT_NO_SUCH_SONG;
-	return playlist_append_song(playlist, song, added_id);
+	return playlist_append_song(playlist, pc, song, added_id);
 }
 #endif
 enum playlist_result
-playlist_append_song(struct playlist *playlist,
+playlist_append_song(struct playlist *playlist, struct player_control *pc,
 		  struct song *song, unsigned *added_id)
 {
 	const struct song *queued;
@@ -121,7 +122,7 @@ playlist_append_song(struct playlist *playlist,
 	playlist_increment_version(playlist);
-	playlist_update_queued_song(playlist, queued);
+	playlist_update_queued_song(playlist, pc, queued);
 	if (added_id)
 		*added_id = id;
@@ -145,8 +146,8 @@ song_by_uri(const char *uri)
 }
 enum playlist_result
-playlist_append_uri(struct playlist *playlist, const char *uri,
+playlist_append_uri(struct playlist *playlist, struct player_control *pc,
-		    unsigned *added_id)
+		    const char *uri, unsigned *added_id)
 {
 	struct song *song;
@@ -156,11 +157,12 @@ playlist_append_uri(struct playlist *playlist, const char *uri,
 	if (song == NULL)
 		return PLAYLIST_RESULT_NO_SUCH_SONG;
-	return playlist_append_song(playlist, song, added_id);
+	return playlist_append_song(playlist, pc, song, added_id);
 }
 enum playlist_result
-playlist_swap_songs(struct playlist *playlist, unsigned song1, unsigned song2)
+playlist_swap_songs(struct playlist *playlist, struct player_control *pc,
+		    unsigned song1, unsigned song2)
 {
 	const struct song *queued;
@@ -192,13 +194,14 @@ playlist_swap_songs(struct playlist *playlist, unsigned song1, unsigned song2)
 	playlist_increment_version(playlist);
-	playlist_update_queued_song(playlist, queued);
+	playlist_update_queued_song(playlist, pc, queued);
 	return PLAYLIST_RESULT_SUCCESS;
 }
 enum playlist_result
-playlist_swap_songs_id(struct playlist *playlist, unsigned id1, unsigned id2)
+playlist_swap_songs_id(struct playlist *playlist, struct player_control *pc,
+		       unsigned id1, unsigned id2)
 {
 	int song1 = queue_id_to_position(&playlist->queue, id1);
 	int song2 = queue_id_to_position(&playlist->queue, id2);
@@ -206,12 +209,12 @@ playlist_swap_songs_id(struct playlist *playlist, unsigned id1, unsigned id2)
 	if (song1 < 0 || song2 < 0)
 		return PLAYLIST_RESULT_NO_SUCH_SONG;
-	return playlist_swap_songs(playlist, song1, song2);
+	return playlist_swap_songs(playlist, pc, song1, song2);
 }
 static void
-playlist_delete_internal(struct playlist *playlist, unsigned song,
+playlist_delete_internal(struct playlist *playlist, struct player_control *pc,
-			 const struct song **queued_p)
+			 unsigned song, const struct song **queued_p)
 {
 	unsigned songOrder;
@@ -220,11 +223,11 @@ playlist_delete_internal(struct playlist *playlist, unsigned song,
 	songOrder = queue_position_to_order(&playlist->queue, song);
 	if (playlist->playing && playlist->current == (int)songOrder) {
-		bool paused = pc_get_state() == PLAYER_STATE_PAUSE;
+		bool paused = pc_get_state(pc) == PLAYER_STATE_PAUSE;
 		/* the current song is going to be deleted: stop the player */
-		pc_stop();
+		pc_stop(pc);
 		playlist->playing = false;
 		/* see which song is going to be played instead */
@@ -236,11 +239,11 @@ playlist_delete_internal(struct playlist *playlist, unsigned song,
 		if (playlist->current >= 0 && !paused)
 			/* play the song after the deleted one */
-			playlist_play_order(playlist, playlist->current);
+			playlist_play_order(playlist, pc, playlist->current);
 		else
 			/* no songs left to play, stop playback
 			   completely */
-			playlist_stop(playlist);
+			playlist_stop(playlist, pc);
 		*queued_p = NULL;
 	} else if (playlist->current == (int)songOrder)
@@ -251,7 +254,7 @@ playlist_delete_internal(struct playlist *playlist, unsigned song,
 	/* now do it: remove the song */
 	if (!song_in_database(queue_get(&playlist->queue, song)))
-		pc_song_deleted(queue_get(&playlist->queue, song));
+		pc_song_deleted(pc, queue_get(&playlist->queue, song));
 	queue_delete(&playlist->queue, song);
@@ -263,7 +266,8 @@ playlist_delete_internal(struct playlist *playlist, unsigned song,
 }
 enum playlist_result
-playlist_delete(struct playlist *playlist, unsigned song)
+playlist_delete(struct playlist *playlist, struct player_control *pc,
+		unsigned song)
 {
 	const struct song *queued;
@@ -272,16 +276,17 @@ playlist_delete(struct playlist *playlist, unsigned song)
 	queued = playlist_get_queued_song(playlist);
-	playlist_delete_internal(playlist, song, &queued);
+	playlist_delete_internal(playlist, pc, song, &queued);
 	playlist_increment_version(playlist);
-	playlist_update_queued_song(playlist, queued);
+	playlist_update_queued_song(playlist, pc, queued);
 	return PLAYLIST_RESULT_SUCCESS;
 }
 enum playlist_result
-playlist_delete_range(struct playlist *playlist, unsigned start, unsigned end)
+playlist_delete_range(struct playlist *playlist, struct player_control *pc,
+		      unsigned start, unsigned end)
 {
 	const struct song *queued;
@@ -297,37 +302,39 @@ playlist_delete_range(struct playlist *playlist, unsigned start, unsigned end)
 	queued = playlist_get_queued_song(playlist);
 	do {
-		playlist_delete_internal(playlist, --end, &queued);
+		playlist_delete_internal(playlist, pc, --end, &queued);
 	} while (end != start);
 	playlist_increment_version(playlist);
-	playlist_update_queued_song(playlist, queued);
+	playlist_update_queued_song(playlist, pc, queued);
 	return PLAYLIST_RESULT_SUCCESS;
 }
 enum playlist_result
-playlist_delete_id(struct playlist *playlist, unsigned id)
+playlist_delete_id(struct playlist *playlist, struct player_control *pc,
+		   unsigned id)
 {
 	int song = queue_id_to_position(&playlist->queue, id);
 	if (song < 0)
 		return PLAYLIST_RESULT_NO_SUCH_SONG;
-	return playlist_delete(playlist, song);
+	return playlist_delete(playlist, pc, song);
 }
 void
-playlist_delete_song(struct playlist *playlist, const struct song *song)
+playlist_delete_song(struct playlist *playlist, struct player_control *pc,
+		     const struct song *song)
 {
 	for (int i = queue_length(&playlist->queue) - 1; i >= 0; --i)
 		if (song == queue_get(&playlist->queue, i))
-			playlist_delete(playlist, i);
+			playlist_delete(playlist, pc, i);
-	pc_song_deleted(song);
+	pc_song_deleted(pc, song);
 }
 enum playlist_result
-playlist_move_range(struct playlist *playlist,
+playlist_move_range(struct playlist *playlist, struct player_control *pc,
 		    unsigned start, unsigned end, int to)
 {
 	const struct song *queued;
@@ -382,23 +389,25 @@ playlist_move_range(struct playlist *playlist,
 	playlist_increment_version(playlist);
-	playlist_update_queued_song(playlist, queued);
+	playlist_update_queued_song(playlist, pc, queued);
 	return PLAYLIST_RESULT_SUCCESS;
 }
 enum playlist_result
-playlist_move_id(struct playlist *playlist, unsigned id1, int to)
+playlist_move_id(struct playlist *playlist, struct player_control *pc,
+		 unsigned id1, int to)
 {
 	int song = queue_id_to_position(&playlist->queue, id1);
 	if (song < 0)
 		return PLAYLIST_RESULT_NO_SUCH_SONG;
-	return playlist_move_range(playlist, song, song+1, to);
+	return playlist_move_range(playlist, pc, song, song+1, to);
 }
 void
-playlist_shuffle(struct playlist *playlist, unsigned start, unsigned end)
+playlist_shuffle(struct playlist *playlist, struct player_control *pc,
+		 unsigned start, unsigned end)
 {
 	const struct song *queued;
@@ -440,5 +449,5 @@ playlist_shuffle(struct playlist *playlist, unsigned start, unsigned end)
 	playlist_increment_version(playlist);
-	playlist_update_queued_song(playlist, queued);
+	playlist_update_queued_song(playlist, pc, queued);
 }
--- a/src/playlist_global.c
+++ b/src/playlist_global.c
@@ -26,6 +26,7 @@
 #include "playlist.h"
 #include "playlist_state.h"
 #include "event_pipe.h"
+#include "main.h"
 struct playlist g_playlist;
@@ -38,7 +39,7 @@ playlist_tag_event(void)
 static void
 playlist_event(void)
 {
-	playlist_sync(&g_playlist);
+	playlist_sync(&g_playlist, global_player_control);
 }
 void

--- a/src/playlist_internal.h
+++ b/src/playlist_internal.h
@@ -27,6 +27,8 @@
 #include "playlist.h"
+struct player_control;
 /**
 * Returns the song object which is currently queued.  Returns none if
 * there is none (yet?) or if MPD isn't playing.
@@ -44,9 +46,11 @@ playlist_get_queued_song(struct playlist *playlist);
 */
 void
 playlist_update_queued_song(struct playlist *playlist,
+			    struct player_control *pc,
 			    const struct song *prev);
 void
-playlist_play_order(struct playlist *playlist, int orderNum);
+playlist_play_order(struct playlist *playlist, struct player_control *pc,
+		    int orderNum);
 #endif
--- a/src/playlist_queue.c
+++ b/src/playlist_queue.c
@@ -27,7 +27,8 @@
 enum playlist_result
 playlist_load_into_queue(const char *uri, struct playlist_provider *source,
-			 struct playlist *dest, bool secure)
+			 struct playlist *dest, struct player_control *pc,
+			 bool secure)
 {
 	enum playlist_result result;
 	struct song *song;
@@ -38,7 +39,7 @@ playlist_load_into_queue(const char *uri, struct playlist_provider *source,
 		if (song == NULL)
 			continue;
-		result = playlist_append_song(dest, song, NULL);
+		result = playlist_append_song(dest, pc, song, NULL);
 		if (result != PLAYLIST_RESULT_SUCCESS) {
 			if (!song_in_database(song))
 				song_free(song);
@@ -53,7 +54,9 @@ playlist_load_into_queue(const char *uri, struct playlist_provider *source,
 }
 enum playlist_result
-playlist_open_into_queue(const char *uri, struct playlist *dest, bool secure)
+playlist_open_into_queue(const char *uri,
+			 struct playlist *dest, struct player_control *pc,
+			 bool secure)
 {
 	struct input_stream *is;
 	struct playlist_provider *playlist = playlist_open_any(uri, &is);
@@ -61,7 +64,7 @@ playlist_open_into_queue(const char *uri, struct playlist *dest, bool secure)
 		return PLAYLIST_RESULT_NO_SUCH_LIST;
 	enum playlist_result result =
-		playlist_load_into_queue(uri, playlist, dest, secure);
+		playlist_load_into_queue(uri, playlist, dest, pc, secure);
 	playlist_plugin_close(playlist);
 	if (is != NULL)

--- a/src/playlist_queue.h
+++ b/src/playlist_queue.h
@@ -40,14 +40,17 @@ struct playlist;
 */
 enum playlist_result
 playlist_load_into_queue(const char *uri, struct playlist_provider *source,
-			 struct playlist *dest, bool secure);
+			 struct playlist *dest, struct player_control *pc,
+			 bool secure);
 /**
 * Opens a playlist with a playlist plugin and append to the specified
 * play queue.
 */
 enum playlist_result
-playlist_open_into_queue(const char *uri, struct playlist *dest, bool secure);
+playlist_open_into_queue(const char *uri,
+			 struct playlist *dest, struct player_control *pc,
+			 bool secure);
 #endif
--- a/src/playlist_save.c
+++ b/src/playlist_save.c
@@ -109,7 +109,8 @@ spl_save_playlist(const char *name_utf8, const struct playlist *playlist)
 }
 enum playlist_result
-playlist_load_spl(struct playlist *playlist, const char *name_utf8)
+playlist_load_spl(struct playlist *playlist, struct player_control *pc,
+		  const char *name_utf8)
 {
 	GPtrArray *list;
@@ -119,7 +120,7 @@ playlist_load_spl(struct playlist *playlist, const char *name_utf8)
 	for (unsigned i = 0; i < list->len; ++i) {
 		const char *temp = g_ptr_array_index(list, i);
-		if ((playlist_append_uri(playlist, temp, NULL)) != PLAYLIST_RESULT_SUCCESS) {
+		if ((playlist_append_uri(playlist, pc, temp, NULL)) != PLAYLIST_RESULT_SUCCESS) {
 			/* for windows compatibility, convert slashes */
 			char *temp2 = g_strdup(temp);
 			char *p = temp2;
@@ -128,7 +129,7 @@ playlist_load_spl(struct playlist *playlist, const char *name_utf8)
 					*p = '/';
 				p++;
 			}
-			if ((playlist_append_uri(playlist, temp, NULL)) != PLAYLIST_RESULT_SUCCESS) {
+			if ((playlist_append_uri(playlist, pc, temp, NULL)) != PLAYLIST_RESULT_SUCCESS) {
 				g_warning("can't add file \"%s\"", temp2);
 			}
 			g_free(temp2);

--- a/src/playlist_save.h
+++ b/src/playlist_save.h
@@ -49,6 +49,7 @@ spl_save_playlist(const char *name_utf8, const struct playlist *playlist);
 * playlist.
 */
 enum playlist_result
-playlist_load_spl(struct playlist *playlist, const char *name_utf8);
+playlist_load_spl(struct playlist *playlist, struct player_control *pc,
+		  const char *name_utf8);
 #endif
--- a/src/playlist_state.c
+++ b/src/playlist_state.c
@@ -53,11 +53,12 @@
 #define PLAYLIST_BUFFER_SIZE	2*MPD_PATH_MAX
 void
-playlist_state_save(FILE *fp, const struct playlist *playlist)
+playlist_state_save(FILE *fp, const struct playlist *playlist,
+		    struct player_control *pc)
 {
 	struct player_status player_status;
-	pc_get_status(&player_status);
+	pc_get_status(pc, &player_status);
 	fputs(PLAYLIST_STATE_FILE_STATE, fp);
@@ -89,10 +90,11 @@ playlist_state_save(FILE *fp, const struct playlist *playlist)
 	fprintf(fp, PLAYLIST_STATE_FILE_CONSUME "%i\n",
 		playlist->queue.consume);
 	fprintf(fp, PLAYLIST_STATE_FILE_CROSSFADE "%i\n",
-		(int)(pc_get_cross_fade()));
+		(int)(pc_get_cross_fade(pc)));
-	fprintf(fp, PLAYLIST_STATE_FILE_MIXRAMPDB "%f\n", pc_get_mixramp_db());
+	fprintf(fp, PLAYLIST_STATE_FILE_MIXRAMPDB "%f\n",
+		pc_get_mixramp_db(pc));
 	fprintf(fp, PLAYLIST_STATE_FILE_MIXRAMPDELAY "%f\n",
-		pc_get_mixramp_delay());
+		pc_get_mixramp_delay(pc));
 	fputs(PLAYLIST_STATE_FILE_PLAYLIST_BEGIN "\n", fp);
 	queue_save(fp, &playlist->queue);
 	fputs(PLAYLIST_STATE_FILE_PLAYLIST_END "\n", fp);
@@ -123,7 +125,7 @@ playlist_state_load(FILE *fp, GString *buffer, struct playlist *playlist)
 bool
 playlist_state_restore(const char *line, FILE *fp, GString *buffer,
-		       struct playlist *playlist)
+		       struct playlist *playlist, struct player_control *pc)
 {
 	int current = -1;
 	int seek_time = 0;
@@ -148,16 +150,16 @@ playlist_state_restore(const char *line, FILE *fp, GString *buffer,
 			if (strcmp
 			    (&(line[strlen(PLAYLIST_STATE_FILE_REPEAT)]),
 			     "1") == 0) {
-				playlist_set_repeat(playlist, true);
+				playlist_set_repeat(playlist, pc, true);
 			} else
-				playlist_set_repeat(playlist, false);
+				playlist_set_repeat(playlist, pc, false);
 		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_SINGLE)) {
 			if (strcmp
 			    (&(line[strlen(PLAYLIST_STATE_FILE_SINGLE)]),
 			     "1") == 0) {
-				playlist_set_single(playlist, true);
+				playlist_set_single(playlist, pc, true);
 			} else
-				playlist_set_single(playlist, false);
+				playlist_set_single(playlist, pc, false);
 		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_CONSUME)) {
 			if (strcmp
 			    (&(line[strlen(PLAYLIST_STATE_FILE_CONSUME)]),
@@ -166,11 +168,14 @@ playlist_state_restore(const char *line, FILE *fp, GString *buffer,
 			} else
 				playlist_set_consume(playlist, false);
 		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_CROSSFADE)) {
-			pc_set_cross_fade(atoi(line + strlen(PLAYLIST_STATE_FILE_CROSSFADE)));
+			pc_set_cross_fade(pc,
+					  atoi(line + strlen(PLAYLIST_STATE_FILE_CROSSFADE)));
 		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_MIXRAMPDB)) {
-			pc_set_mixramp_db(atof(line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDB)));
+			pc_set_mixramp_db(pc,
+					  atof(line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDB)));
 		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_MIXRAMPDELAY)) {
-			pc_set_mixramp_delay(atof(line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDELAY)));
+			pc_set_mixramp_delay(pc,
+					     atof(line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDELAY)));
 		} else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_RANDOM)) {
 			random_mode =
 				strcmp(line + strlen(PLAYLIST_STATE_FILE_RANDOM),
@@ -185,7 +190,7 @@ playlist_state_restore(const char *line, FILE *fp, GString *buffer,
 		}
 	}
-	playlist_set_random(playlist, random_mode);
+	playlist_set_random(playlist, pc, random_mode);
 	if (!queue_is_empty(&playlist->queue)) {
 		if (!queue_valid_position(&playlist->queue, current))
@@ -195,28 +200,29 @@ playlist_state_restore(const char *line, FILE *fp, GString *buffer,
 		   called here, after the audio output states were
 		   restored, before playback begins */
 		if (state != PLAYER_STATE_STOP)
-			pc_update_audio();
+			pc_update_audio(pc);
 		if (state == PLAYER_STATE_STOP /* && config_option */)
 			playlist->current = current;
 		else if (seek_time == 0)
-			playlist_play(playlist, current);
+			playlist_play(playlist, pc, current);
 		else
-			playlist_seek_song(playlist, current, seek_time);
+			playlist_seek_song(playlist, pc, current, seek_time);
 		if (state == PLAYER_STATE_PAUSE)
-			pc_pause();
+			pc_pause(pc);
 	}
 	return true;
 }
 unsigned
-playlist_state_get_hash(const struct playlist *playlist)
+playlist_state_get_hash(const struct playlist *playlist,
+			struct player_control *pc)
 {
 	struct player_status player_status;
-	pc_get_status(&player_status);
+	pc_get_status(pc, &player_status);
 	return playlist->queue.version ^
 		(player_status.state != PLAYER_STATE_STOP
@@ -226,7 +232,7 @@ playlist_state_get_hash(const struct playlist *playlist)
 		 ? (queue_order_to_position(&playlist->queue,
 					    playlist->current) << 16)
 		 : 0) ^
-		((int)pc_get_cross_fade() << 20) ^
+		((int)pc_get_cross_fade(pc) << 20) ^
 		(player_status.state << 24) ^
 		(playlist->queue.random << 27) ^
 		(playlist->queue.repeat << 28) ^

--- a/src/playlist_state.h
+++ b/src/playlist_state.h
@@ -30,13 +30,15 @@
 #include <stdio.h>
 struct playlist;
+struct player_control;
 void
-playlist_state_save(FILE *fp, const struct playlist *playlist);
+playlist_state_save(FILE *fp, const struct playlist *playlist,
+		    struct player_control *pc);
 bool
 playlist_state_restore(const char *line, FILE *fp, GString *buffer,
-		       struct playlist *playlist);
+		       struct playlist *playlist, struct player_control *pc);
 /**
 * Generates a hash number for the current state of the playlist and
@@ -45,6 +47,7 @@ playlist_state_restore(const char *line, FILE *fp, GString *buffer,
 * be saved.
 */
 unsigned
-playlist_state_get_hash(const struct playlist *playlist);
+playlist_state_get_hash(const struct playlist *playlist,
+			struct player_control *pc);
 #endif
--- a/src/state_file.c
+++ b/src/state_file.c
@@ -47,7 +47,7 @@ static unsigned prev_volume_version, prev_output_version,
 	prev_playlist_version;
 static void
-state_file_write(void)
+state_file_write(struct player_control *pc)
 {
 	FILE *fp;
@@ -64,17 +64,17 @@ state_file_write(void)
 	save_sw_volume_state(fp);
 	audio_output_state_save(fp);
-	playlist_state_save(fp, &g_playlist);
+	playlist_state_save(fp, &g_playlist, pc);
 	fclose(fp);
 	prev_volume_version = sw_volume_state_get_hash();
 	prev_output_version = audio_output_state_get_version();
-	prev_playlist_version = playlist_state_get_hash(&g_playlist);
+	prev_playlist_version = playlist_state_get_hash(&g_playlist, pc);
 }
 static void
-state_file_read(void)
+state_file_read(struct player_control *pc)
 {
 	FILE *fp;
 	bool success;
@@ -95,7 +95,8 @@ state_file_read(void)
 	while ((line = read_text_line(fp, buffer)) != NULL) {
 		success = read_sw_volume_state(line) ||
 			audio_output_state_read(line) ||
-			playlist_state_restore(line, fp, buffer, &g_playlist);
+			playlist_state_restore(line, fp, buffer,
+					       &g_playlist, pc);
 		if (!success)
 			g_warning("Unrecognized line in state file: %s", line);
 	}
@@ -104,7 +105,7 @@ state_file_read(void)
 	prev_volume_version = sw_volume_state_get_hash();
 	prev_output_version = audio_output_state_get_version();
-	prev_playlist_version = playlist_state_get_hash(&g_playlist);
+	prev_playlist_version = playlist_state_get_hash(&g_playlist, pc);
 	g_string_free(buffer, true);
@@ -115,21 +116,23 @@ state_file_read(void)
 * saves the state file.
 */
 static gboolean
-timer_save_state_file(G_GNUC_UNUSED gpointer data)
+timer_save_state_file(gpointer data)
 {
+	struct player_control *pc = data;
 	if (prev_volume_version == sw_volume_state_get_hash() &&
 	    prev_output_version == audio_output_state_get_version() &&
-	    prev_playlist_version == playlist_state_get_hash(&g_playlist))
+	    prev_playlist_version == playlist_state_get_hash(&g_playlist, pc))
 		/* nothing has changed - don't save the state file,
 		   don't spin up the hard disk */
 		return true;
-	state_file_write();
+	state_file_write(pc);
 	return true;
 }
 void
-state_file_init(const char *path)
+state_file_init(const char *path, struct player_control *pc)
 {
 	assert(state_file_path == NULL);
@@ -137,15 +140,15 @@ state_file_init(const char *path)
 		return;
 	state_file_path = g_strdup(path);
-	state_file_read();
+	state_file_read(pc);
 	save_state_source_id = g_timeout_add_seconds(5 * 60,
 						     timer_save_state_file,
-						     NULL);
+						     pc);
 }
 void
-state_file_finish(void)
+state_file_finish(struct player_control *pc)
 {
 	if (state_file_path == NULL)
 		/* no state file configured, no cleanup required */
@@ -154,7 +157,7 @@ state_file_finish(void)
 	if (save_state_source_id != 0)
 		g_source_remove(save_state_source_id);
-	state_file_write();
+	state_file_write(pc);
 	g_free(state_file_path);
 }
--- a/src/state_file.h
+++ b/src/state_file.h
@@ -20,11 +20,13 @@
 #ifndef MPD_STATE_FILE_H
 #define MPD_STATE_FILE_H
+struct player_control;
 void
-state_file_init(const char *path);
+state_file_init(const char *path, struct player_control *pc);
 void
-state_file_finish(void);
+state_file_finish(struct player_control *pc);
 void write_state_file(void);

--- a/src/stats.c
+++ b/src/stats.c
@@ -25,6 +25,7 @@
 #include "client.h"
 #include "player_control.h"
 #include "strset.h"
+#include "client_internal.h"
 struct stats stats;
@@ -114,7 +115,7 @@ int stats_print(struct client *client)
 		      stats.album_count,
 		      stats.song_count,
 		      (long)g_timer_elapsed(stats.timer, NULL),
-		      (long)(pc_get_total_play_time() + 0.5),
+		      (long)(pc_get_total_play_time(client->player_control) + 0.5),
 		      stats.song_duration,
 		      db_get_mtime());
 	return 0;

--- a/src/update_remove.c
+++ b/src/update_remove.c
@@ -23,6 +23,7 @@
 #include "event_pipe.h"
 #include "song.h"
 #include "playlist.h"
+#include "main.h"
 #ifdef ENABLE_SQLITE
 #include "sticker.h"
@@ -58,7 +59,7 @@ song_remove_event(void)
 		sticker_song_delete(removed_song);
 #endif
-	playlist_delete_song(&g_playlist, removed_song);
+	playlist_delete_song(&g_playlist, global_player_control, removed_song);
 	removed_song = NULL;
 	notify_signal(&remove_notify);

--- a/test/run_output.c
+++ b/test/run_output.c
@@ -28,6 +28,7 @@
 #include "event_pipe.h"
 #include "idle.h"
 #include "playlist.h"
+#include "player_control.h"
 #include "stdbin.h"
 #include <glib.h>
@@ -104,7 +105,9 @@ load_audio_output(struct audio_output *ao, const char *name)
 		return false;
 	}
-	success = audio_output_init(ao, param, &error);
+	static struct player_control dummy_player_control;
+	success = audio_output_init(ao, param, &dummy_player_control, &error);
 	if (!success) {
 		g_printerr("%s\n", error->message);
 		g_error_free(error);