FS6338: Playlist playing time

Originally by Stephane Doyon.
Updated by Alex Wallis, Igor Poretsky, and myself.

Change-Id: I15a06f7774c886cefd9c2cb93230d67de3e5f9a9

apps/lang/english.lang

@@ -237,7 +237,7 @@
     *: "Loading... %d%% done (%s)"
   </dest>
   <voice>
-    *: ""
+    *: "Loading"
   </voice>
 </phrase>
 <phrase>
@@ -13829,3 +13829,157 @@
     *: "Never"
   </voice>
 </phrase>
+<phrase>
+  id: LANG_PLAYTIME_ELAPSED
+  desc: playing time screen
+  user: core
+  <source>
+    *: "Playlist elapsed: %s / %s %ld%%"
+  </source>
+  <dest>
+    *: "Playlist elapsed: %s / %s %ld%%"
+  </dest>
+  <voice>
+    *: "Playlist elapsed"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_PLAYTIME_TRK_ELAPSED
+  desc: playing time screen
+  user: core
+  <source>
+    *: "Track elapsed: %s / %s %ld%%"
+  </source>
+  <dest>
+    *: "Track elapsed: %s / %s %ld%%"
+  </dest>
+  <voice>
+    *: "Track elapsed"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_PLAYTIME_REMAINING
+  desc: playing time screen
+  user: core
+  <source>
+    *: "Playlist remaining: %s"
+  </source>
+  <dest>
+    *: "Playlist remaining: %s"
+  </dest>
+  <voice>
+    *: "Playlist remaining"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_PLAYTIME_TRK_REMAINING
+  desc: playing time screen
+  user: core
+  <source>
+    *: "Track remaining: %s"
+  </source>
+  <dest>
+    *: "Track remaining: %s"
+  </dest>
+  <voice>
+    *: "Track remaining"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_PLAYTIME_TRACK
+  desc: playing time screen
+  user: core
+  <source>
+    *: "Track %d / %d %d%%"
+  </source>
+  <dest>
+    *: "Track %d / %d %d%%"
+  </dest>
+  <voice>
+    *: "Track"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_PLAYTIME_STORAGE
+  desc: playing time screen
+  user: core
+  <source>
+    *: "Storage: %s (done %s, remaining %s)"
+  </source>
+  <dest>
+    *: "Storage: %s (done %s, remaining %s)"
+  </dest>
+  <voice>
+    *: "Storage"
+  </voice>
+</phrase>
+<phrase>
+  id: VOICE_PLAYTIME_DONE
+  desc: playing time screen
+  user: core
+  <source>
+    *: ""
+  </source>
+  <dest>
+    *: ""
+  </dest>
+  <voice>
+    *: "Done"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_PLAYTIME_AVG_TRACK_SIZE
+  desc: playing time screen
+  user: core
+  <source>
+    *: "Average track size: %s"
+  </source>
+  <dest>
+    *: "Average track size: %s"
+  </dest>
+  <voice>
+    *: "Average track size"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_PLAYTIME_AVG_BITRATE
+  desc: playing time screen
+  user: core
+  <source>
+    *: "Average bitrate: %ld kbps"
+  </source>
+  <dest>
+    *: "Average bitrate: %ld kbps"
+  </dest>
+  <voice>
+    *: "Average bit rate"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_PLAYTIME_ERROR
+  desc: playing time screen
+  user: core
+  <source>
+    *: "Error while gathering info"
+  </source>
+  <dest>
+    *: "Error while gathering info"
+  </dest>
+  <voice>
+    *: "Error while gathering info"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_PLAYING_TIME
+  desc: onplay menu
+  user: core
+  <source>
+    *: "Playing time"
+  </source>
+  <dest>
+    *: "Playing time"
+  </dest>
+  <voice>
+    *: "Playing time"
+  </voice>
+</phrase>

apps/onplay.c

@@ -192,6 +192,263 @@ static int bookmark_menu_callback(int action,
     return action;
 }
 
+/* playing_time screen context */
+struct playing_time_info {
+    int curr_playing; /* index of currently playing track in playlist */
+    int nb_tracks; /* how many tracks in playlist */
+    /* seconds before and after current position, and total.  Datatype
+       allows for values up to 68years.  If I had kept it in ms
+       though, it would have overflowed at 24days, which takes
+       something like 8.5GB at 32kbps, and so we could conceivably
+       have playlists lasting longer than that. */
+    long secs_bef, secs_aft, secs_ttl;
+    long trk_secs_bef, trk_secs_aft, trk_secs_ttl;
+    /* kilobytes played before and after current pos, and total.
+       Kilobytes because bytes would overflow. Data type range is up
+       to 2TB. */
+    long kbs_bef, kbs_aft, kbs_ttl;
+};
+
+/* list callback for playing_time screen */
+static const char * playing_time_get_or_speak_info(int selected_item, void * data,
+                                                   char *buf, size_t buffer_len,
+                                                   bool say_it)
+{
+    struct playing_time_info *pti = (struct playing_time_info *)data;
+    switch(selected_item) {
+    case 0: { /* elapsed and total time */
+        char timestr1[25], timestr2[25];
+        format_time_auto(timestr1, sizeof(timestr1), pti->secs_bef,
+                         UNIT_SEC, false);
+        format_time_auto(timestr2, sizeof(timestr2), pti->secs_ttl,
+                         UNIT_SEC, false);
+        long elapsed_perc; /* percentage of duration elapsed */
+        if (pti->secs_ttl == 0)
+            elapsed_perc = 0;
+        else if (pti->secs_ttl <= 0xFFFFFF)
+            elapsed_perc = pti->secs_bef *100 / pti->secs_ttl;
+        else /* sacrifice some precision to avoid overflow */
+            elapsed_perc = (pti->secs_bef>>7) *100 /(pti->secs_ttl>>7);
+        snprintf(buf, buffer_len, str(LANG_PLAYTIME_ELAPSED),
+                 timestr1, timestr2, elapsed_perc);
+        if (say_it)
+            talk_ids(false, LANG_PLAYTIME_ELAPSED,
+                     TALK_ID(pti->secs_bef, UNIT_TIME),
+                     VOICE_OF,
+                     TALK_ID(pti->secs_ttl, UNIT_TIME),
+                     VOICE_PAUSE,
+                     TALK_ID(elapsed_perc, UNIT_PERCENT));
+        break;
+    }
+    case 1: { /* playlist remaining time */
+        char timestr[25];
+        format_time_auto(timestr, sizeof(timestr), pti->secs_aft,
+			 UNIT_SEC, false);
+        snprintf(buf, buffer_len, str(LANG_PLAYTIME_REMAINING),
+                 timestr);
+        if (say_it)
+          talk_ids(false, LANG_PLAYTIME_REMAINING,
+                     TALK_ID(pti->secs_aft, UNIT_TIME));
+        break;
+    }
+    case 2: { /* track elapsed and duration */
+        char timestr1[25], timestr2[25];
+        format_time_auto(timestr1, sizeof(timestr1), pti->trk_secs_bef,
+			 UNIT_SEC, false);
+        format_time_auto(timestr2, sizeof(timestr2), pti->trk_secs_ttl,
+			 UNIT_SEC, false);
+        long elapsed_perc; /* percentage of duration elapsed */
+        if (pti->trk_secs_ttl == 0)
+            elapsed_perc = 0;
+        else if (pti->trk_secs_ttl <= 0xFFFFFF)
+            elapsed_perc = pti->trk_secs_bef *100 / pti->trk_secs_ttl;
+        else /* sacrifice some precision to avoid overflow */
+            elapsed_perc = (pti->trk_secs_bef>>7) *100 /(pti->trk_secs_ttl>>7);
+        snprintf(buf, buffer_len, str(LANG_PLAYTIME_TRK_ELAPSED),
+                 timestr1, timestr2, elapsed_perc);
+        if (say_it)
+            talk_ids(false, LANG_PLAYTIME_TRK_ELAPSED,
+                     TALK_ID(pti->trk_secs_bef, UNIT_TIME),
+                     VOICE_OF,
+                     TALK_ID(pti->trk_secs_ttl, UNIT_TIME),
+                     VOICE_PAUSE,
+                     TALK_ID(elapsed_perc, UNIT_PERCENT));
+        break;
+    }
+    case 3: { /* track remaining time */
+        char timestr[25];
+        format_time_auto(timestr, sizeof(timestr), pti->trk_secs_aft,
+			 UNIT_SEC, false);
+        snprintf(buf, buffer_len, str(LANG_PLAYTIME_TRK_REMAINING),
+                 timestr);
+        if (say_it)
+          talk_ids(false, LANG_PLAYTIME_TRK_REMAINING,
+                     TALK_ID(pti->trk_secs_aft, UNIT_TIME));
+        break;
+    }
+    case 4: { /* track index */
+        int track_perc = (pti->curr_playing+1) *100 / pti->nb_tracks;
+        snprintf(buf, buffer_len, str(LANG_PLAYTIME_TRACK),
+                 pti->curr_playing, pti->nb_tracks, track_perc);
+        if (say_it)
+          talk_ids(false, LANG_PLAYTIME_TRACK,
+                     TALK_ID(pti->curr_playing+1, UNIT_INT),
+                     VOICE_OF,
+                     TALK_ID(pti->nb_tracks, UNIT_INT),
+                     VOICE_PAUSE,
+                     TALK_ID(track_perc, UNIT_PERCENT));
+        break;
+    }
+    case 5: { /* storage size */
+        char str1[10], str2[10], str3[10];
+        output_dyn_value(str1, sizeof(str1), pti->kbs_ttl, kibyte_units, 3, true);
+        output_dyn_value(str2, sizeof(str2), pti->kbs_bef, kibyte_units, 3, true);
+        output_dyn_value(str3, sizeof(str3), pti->kbs_aft, kibyte_units, 3, true);
+        snprintf(buf, buffer_len, str(LANG_PLAYTIME_STORAGE),
+                 str1,str2,str3);
+        if (say_it) {
+            talk_id(LANG_PLAYTIME_STORAGE, false);
+            output_dyn_value(NULL, 0, pti->kbs_ttl, kibyte_units, 3, true);
+            talk_ids(true, VOICE_PAUSE, VOICE_PLAYTIME_DONE);
+            output_dyn_value(NULL, 0, pti->kbs_bef, kibyte_units, 3, true);
+            talk_id(LANG_PLAYTIME_REMAINING, true);
+            output_dyn_value(NULL, 0, pti->kbs_aft, kibyte_units, 3, true);
+        }
+        break;
+    }
+    case 6: { /* Average track file size */
+        char str[10];
+        long avg_track_size = pti->kbs_ttl /pti->nb_tracks;
+        output_dyn_value(str, sizeof(str), avg_track_size, kibyte_units, 3, true);
+        snprintf(buf, buffer_len, str(LANG_PLAYTIME_AVG_TRACK_SIZE),
+                 str);
+        if (say_it) {
+            talk_id(LANG_PLAYTIME_AVG_TRACK_SIZE, false);
+            output_dyn_value(NULL, 0, avg_track_size, kibyte_units, 3, true);
+        }
+        break;
+    }
+    case 7: { /* Average bitrate */
+        /* Convert power of 2 kilobytes to power of 10 kilobits */
+        long avg_bitrate = pti->kbs_ttl / pti->secs_ttl *1024 *8 /1000;
+        snprintf(buf, buffer_len, str(LANG_PLAYTIME_AVG_BITRATE),
+                 avg_bitrate);
+        if (say_it)
+          talk_ids(false, LANG_PLAYTIME_AVG_BITRATE,
+                   TALK_ID(avg_bitrate, UNIT_KBIT));
+        break;
+    }
+    }
+    return buf;
+}
+
+static const char * playing_time_get_info(int selected_item, void * data,
+                                          char *buffer, size_t buffer_len)
+{
+    return playing_time_get_or_speak_info(selected_item, data,
+                                          buffer, buffer_len, false);
+}
+
+static int playing_time_speak_info(int selected_item, void * data)
+{
+    static char buffer[MAX_PATH];
+    playing_time_get_or_speak_info(selected_item, data,
+                                   buffer, MAX_PATH, true);
+    return 0;
+}
+
+/* playing time screen: shows total and elapsed playlist duration and
+   other stats */
+static bool playing_time(void)
+{
+    unsigned long talked_tick = current_tick;
+    struct playing_time_info pti;
+    struct playlist_track_info pltrack;
+    struct mp3entry id3;
+    int i, fd, ret;
+
+    pti.nb_tracks = playlist_amount();
+    playlist_get_resume_info(&pti.curr_playing);
+    struct mp3entry *curr_id3 = audio_current_track();
+    if (pti.curr_playing == -1 || !curr_id3)
+        return false;
+    pti.secs_bef = pti.trk_secs_bef = curr_id3->elapsed/1000;
+    pti.secs_aft = pti.trk_secs_aft
+        = (curr_id3->length -curr_id3->elapsed)/1000;
+    pti.kbs_bef = curr_id3->offset/1024;
+    pti.kbs_aft = (curr_id3->filesize -curr_id3->offset)/1024;
+
+    splash(0, ID2P(LANG_WAIT));
+
+    /* Go through each file in the playlist and get its stats. For
+       huge playlists this can take a while... The reference position
+       is the position at the moment this function was invoked,
+       although playback continues forward. */
+    for (i = 0; i < pti.nb_tracks; i++) {
+        /* Show a splash while we are loading. */
+        splashf(0, str(LANG_LOADING_PERCENT),
+                i*100/pti.nb_tracks, str(LANG_OFF_ABORT));
+        /* Voice equivalent */
+        if (TIME_AFTER(current_tick, talked_tick+5*HZ)) {
+            talked_tick = current_tick;
+            talk_ids(false, LANG_LOADING_PERCENT,
+                     TALK_ID(i*100/pti.nb_tracks, UNIT_PERCENT));
+        }
+        if (action_userabort(TIMEOUT_NOBLOCK))
+            goto exit;
+
+        if (i == pti.curr_playing)
+            continue;
+
+        if (playlist_get_track_info(NULL, i, &pltrack) < 0)
+            goto error;
+        if ((fd = open(pltrack.filename, O_RDONLY)) < 0)
+            goto error;
+        ret = get_metadata(&id3, fd, pltrack.filename);
+        close(fd);
+        if (!ret)
+            goto error;
+
+        if (i < pti.curr_playing) {
+            pti.secs_bef += id3.length/1000;
+            pti.kbs_bef += id3.filesize/1024;
+        } else {
+            pti.secs_aft += id3.length/1000;
+            pti.kbs_aft += id3.filesize/1024;
+        }
+    }
+
+    pti.secs_ttl = pti.secs_bef +pti.secs_aft;
+    pti.trk_secs_ttl = pti.trk_secs_bef +pti.trk_secs_aft;
+    pti.kbs_ttl = pti.kbs_bef +pti.kbs_aft;
+
+    struct gui_synclist pt_lists;
+    int key;
+
+    gui_synclist_init(&pt_lists, &playing_time_get_info, &pti, true, 1, NULL);
+    if (global_settings.talk_menu)
+        gui_synclist_set_voice_callback(&pt_lists, playing_time_speak_info);
+    gui_synclist_set_nb_items(&pt_lists, 8);
+    gui_synclist_draw(&pt_lists);
+    gui_syncstatusbar_draw(&statusbars, true);
+    gui_synclist_speak_item(&pt_lists);
+    while (true) {
+        gui_syncstatusbar_draw(&statusbars, false);
+        if (list_do_action(CONTEXT_LIST, HZ/2,
+                          &pt_lists, &key, LIST_WRAP_UNLESS_HELD) == 0
+           && key!=ACTION_NONE && key!=ACTION_UNKNOWN)
+        {
+            talk_force_shutup();
+            return(default_event_handler(key) == SYS_USB_CONNECTED);
+        }
+    }
+ error:
+    splash(HZ, ID2P(LANG_PLAYTIME_ERROR));
+ exit:
+    return false;
+}
+
+
 /* CONTEXT_WPS playlist options */
 static bool shuffle_playlist(void)
 {
@@ -213,10 +470,12 @@ MENUITEM_FUNCTION(playlist_save_item, 0, ID2P(LANG_SAVE_DYNAMIC_PLAYLIST),
                   save_playlist, NULL, NULL, Icon_Playlist);
 MENUITEM_FUNCTION(reshuffle_item, 0, ID2P(LANG_SHUFFLE_PLAYLIST),
                   shuffle_playlist, NULL, NULL, Icon_Playlist);
+MENUITEM_FUNCTION(playing_time_item, 0, ID2P(LANG_PLAYING_TIME),
+                  playing_time, NULL, NULL, Icon_Playlist);
 MAKE_ONPLAYMENU( wps_playlist_menu, ID2P(LANG_PLAYLIST),
                  NULL, Icon_Playlist,
                  &view_cur_playlist, &search_playlist_item,
-                 &playlist_save_item, &reshuffle_item
+                 &playlist_save_item, &reshuffle_item, &playing_time_item
                );
 
 /* CONTEXT_[TREE|ID3DB] playlist options */
@@ -381,18 +640,18 @@ MENUITEM_FUNCTION(view_playlist_item, 0, ID2P(LANG_VIEW),
 
 MAKE_ONPLAYMENU( tree_playlist_menu, ID2P(LANG_CURRENT_PLAYLIST),
                  treeplaylist_callback, Icon_Playlist,
-                 
+
                  /* view */
                  &view_playlist_item,
-                 
+
                  /* insert */
                  &i_pl_item, &i_first_pl_item, &i_last_pl_item,
                  &i_shuf_pl_item, &i_last_shuf_pl_item,
                  /* queue */
-                 
+
                  &q_pl_item, &q_first_pl_item, &q_last_pl_item,
                  &q_shuf_pl_item, &q_last_shuf_pl_item,
-                 
+
                  /* replace */
                  &replace_pl_item
                );
@@ -941,7 +1200,7 @@ static int clipboard_pastedirectory(struct dirrecurse_params *src,
                        a move instead */
                     flags |= PASTE_EXDEV;
                     break;
-                }                
+                }
             #endif /* HAVE_MULTIVOLUME */
             }
         }
@@ -999,7 +1258,7 @@ static int clipboard_pastedirectory(struct dirrecurse_params *src,
             rc = OPRC_CANCELLED;
             break;
         }
- 
+
         DEBUGF("Copy %s to %s\n", src->path, target->path);
 
         if (info.attribute & ATTR_DIRECTORY) {
@@ -1151,16 +1410,16 @@ static int ratingitem_callback(int action,const struct menu_item_ex *this_item)
 MENUITEM_FUNCTION(rating_item, 0, ID2P(LANG_MENU_SET_RATING),
                   set_rating_inline, NULL,
                   ratingitem_callback, Icon_Questionmark);
-#endif                  
+#endif
-#ifdef HAVE_PICTUREFLOW_INTEGRATION                  
+#ifdef HAVE_PICTUREFLOW_INTEGRATION
-MENUITEM_RETURNVALUE(pictureflow_item, ID2P(LANG_ONPLAY_PICTUREFLOW), 
+MENUITEM_RETURNVALUE(pictureflow_item, ID2P(LANG_ONPLAY_PICTUREFLOW),
-                  GO_TO_PICTUREFLOW, NULL, Icon_NOICON);                  
+                  GO_TO_PICTUREFLOW, NULL, Icon_NOICON);
 #endif
 
 static bool view_cue(void)
 {
     struct mp3entry* id3 = audio_current_track();
-    if(id3 && id3->cuesheet)
+    if (id3 && id3->cuesheet)
     {
         browse_cuesheet(id3->cuesheet);
     }
@@ -1274,7 +1533,7 @@ MENUITEM_FUNCTION(set_recdir_item, 0, ID2P(LANG_SET_AS_REC_DIR),
 #endif
 static bool set_startdir(void)
 {
-    snprintf(global_settings.start_directory, 
+    snprintf(global_settings.start_directory,
              sizeof(global_settings.start_directory),
              "%s/", selected_file);
     settings_save();
@@ -1375,10 +1634,10 @@ MAKE_ONPLAYMENU( wps_onplay_menu, ID2P(LANG_ONPLAY_MENU_TITLE),
 #ifdef HAVE_TAGCACHE
            &rating_item,
 #endif
-           &bookmark_menu, 
+           &bookmark_menu,
 #ifdef HAVE_PICTUREFLOW_INTEGRATION
            &pictureflow_item,
-#endif           
+#endif
            &browse_id3_item, &list_viewers_item,
            &delete_file_item, &view_cue_item,
 #ifdef HAVE_PITCHCONTROL
@@ -1451,7 +1710,7 @@ static int playlist_insert_shuffled(void)
         playlist_insert_func((intptr_t*)PLAYLIST_INSERT_SHUFFLED);
         return ONPLAY_START_PLAY;
     }
-    
+
     return ONPLAY_RELOAD_DIR;
 }
 
@@ -1465,7 +1724,7 @@ struct hotkey_assignment {
 #define HOTKEY_FUNC(func, param) {{(void *)func}, param}
 
 /* Any desired hotkey functions go here, in the enum in onplay.h,
-   and in the settings menu in settings_list.c.  The order here 
+   and in the settings menu in settings_list.c.  The order here
    is not important. */
 static struct hotkey_assignment hotkey_items[] = {
     { HOTKEY_VIEW_PLAYLIST,     LANG_VIEW_DYNAMIC_PLAYLIST,
@@ -1510,7 +1769,7 @@ int get_hotkey_lang_id(int action)
         if (hotkey_items[i].action == action)
             return hotkey_items[i].lang_id;
     }
-    
+
     return LANG_OFF;
 }
 
@@ -1521,7 +1780,7 @@ static int execute_hotkey(bool is_wps)
     struct hotkey_assignment *this_item;
     const int action = (is_wps ? global_settings.hotkey_wps :
         global_settings.hotkey_tree);
-    
+
     /* search assignment struct for a match for the hotkey setting */
     while (i--)
     {
@@ -1546,7 +1805,7 @@ static int execute_hotkey(bool is_wps)
             return return_code;
         }
     }
-    
+
     /* no valid hotkey set, ignore hotkey */
     return ONPLAY_RELOAD_DIR;
 }

docs/CREDITS

@@ -673,6 +673,8 @@ Malik Enes Şafak
 Roman Levkin-Taymenev
 Nathan Follens
 Gergely Békési
+Stephane Doyon
+Alex Wallis
 
 The libmad team
 The wavpack team

manual/rockbox_interface/wps.tex

@@ -213,20 +213,20 @@ your WPS (While Playing Screen).
   \end{description}
 }
 \subsection{\label{sec:contextmenu}The WPS Context Menu}
-Like the context menu for the \setting{File Browser}, the \setting{WPS Context Menu} 
+Like the context menu for the \setting{File Browser}, the \setting{WPS Context Menu}
 allows you quick access to some often used functions.
 
 \subsubsection{Playlist}
-The \setting{Playlist} submenu allows you to view, save, search and
+The \setting{Playlist} submenu allows you to view, save, search, reshuffle,
-reshuffle the current playlist. These and other operations are detailed in
+and display the play time of the current playlist. These and other operations
-\reference{ref:working_with_playlists}. To change settings for the
+are detailed in \reference{ref:working_with_playlists}. To change settings for
-\setting{Playlist Viewer} press \ActionStdContext{} while viewing the current
+the \setting{Playlist Viewer} press \ActionStdContext{} while viewing the
-playlist to bring up the \setting{Playlist Viewer Menu}. In this menu, you
+current playlist to bring up the \setting{Playlist Viewer Menu}. In this
-can find the \setting{Playlist Viewer Settings}.
+menu, you can find the \setting{Playlist Viewer Settings}.
 
 \paragraph{Playlist Viewer Settings}
   \begin{description}
-    \item[Show Icons.] This toggles display of the icon for the currently 
+    \item[Show Icons.] This toggles display of the icon for the currently
     selected playlist entry and the icon for moving a playlist entry
     \item[Show Indices.] This toggles display of the line numbering for
        the playlist

manual/working_with_playlists/main.tex

@@ -137,10 +137,11 @@ playlist.
 Dynamic playlists are saved so resume will restore them exactly as they
 were before shutdown.
 
-\note{To view, save or reshuffle the current dynamic playlist use the
+\note{To view, save, reshuffle, or display the play time of the current
+  dynamic playlist use the
   \setting{Playlist} sub menu in the WPS context menu or in the
   \setting{Main Menu}.}
-  
+
 \subsection{Modifying playlists}
 \subsubsection{Reshuffling}
 Reshuffling the current playlist is easily done from the \setting{Playlist}