Added dircache support to playlist. Now playlist filename pointers are

automatically accuired from dircache. WPS UI response with dircache
enabled should be instant.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7931 a1c6a512-1295-4272-9138-f99709370657

8 files changed, 336 insertions, 75 deletions

diff --git a/apps/filetree.c b/apps/filetree.c
index a873d85..a9670e1 100644
--- a/apps/filetree.c
+++ b/apps/filetree.c
@@ -340,6 +340,7 @@ int ft_enter(struct tree_context* c)
         int start_index=0;
 
         lcd_stop_scroll();
+        gui_syncsplash(0, true, str(LANG_WAIT));
         switch ( file->attr & TREE_ATTR_MASK ) {
             case TREE_ATTR_M3U:
                 if (bookmark_autoload(buf))
diff --git a/apps/lang/english.lang b/apps/lang/english.lang
index 4e712a2..6afcb57 100644
--- a/apps/lang/english.lang
+++ b/apps/lang/english.lang
@@ -3431,3 +3431,9 @@ eng: "Clear current presets?"
 voice: "Clear current presets?"
 new:
 
+id: LANG_WAIT
+desc: general please wait splash
+eng: "=== Please Wait ==="
+voice: "Please wait"
+new:
+
diff --git a/apps/playback.c b/apps/playback.c
index 7f28331..b68cb64 100644
--- a/apps/playback.c
+++ b/apps/playback.c
@@ -165,9 +165,6 @@ static volatile int buf_widx;
 /* Step count to the next unbuffered track. */
 static int last_peek_offset;
 
-/* Index of the last buffered track. */
-static int last_index;
-
 /* Track information (count in file buffer, read/write indexes for
    track ring structure. */
 int track_count;
@@ -589,7 +586,7 @@ static bool rebuffer_and_seek(int newpos)
 
     while (cur_ti->available == 0 && cur_ti->filerem > 0) {
         yield();
-        if (ci.stop_codec || ci.reload_codec)
+        if (ci.stop_codec || ci.reload_codec || !queue_empty(&audio_queue))
             return false;
     }
     
@@ -1048,8 +1045,6 @@ bool audio_load_track(int offset, bool start_play, int peek_offset)
     if (tracks[track_widx].filesize != 0)
         return false;
 
-    last_index = playlist_get_display_index();
-
     peek_again:
     /* Get track name from current playlist read position. */
     logf("Buffering track:%d/%d", track_widx, track_ridx);
@@ -1456,7 +1451,6 @@ void audio_update_trackinfo(void)
     } else {
         pcmbuf_add_event(codec_track_changed);
     }
-    last_index = playlist_get_display_index();
 }
 
 static void audio_stop_playback(void)
@@ -1519,8 +1513,8 @@ bool codec_request_next_track_callback(void)
 {
     if (current_codec == CODEC_IDX_VOICE) {
         voice_remaining = 0;
-        /* Terminate the codec if they are messages waiting on the queue or
-           core has been requested the codec to be terminated. */
+        /* Terminate the codec if there are messages waiting on the queue or
+           the core has been requested the codec to be terminated. */
         return !ci_voice.stop_codec && queue_empty(&voice_codec_queue);
     }
         
@@ -1531,12 +1525,7 @@ bool codec_request_next_track_callback(void)
 
     /* Advance to next track. */
     if (ci.reload_codec && new_track > 0) {
-        if (!playlist_check(new_track)) {
-            ci.reload_codec = false;
-            return false;
-        }
         last_peek_offset--;
-        playlist_next(new_track);
         if (++track_ridx == MAX_TRACK)
             track_ridx = 0;
         
@@ -1549,7 +1538,6 @@ bool codec_request_next_track_callback(void)
         if (tracks[track_ridx].filesize == 0) {
             logf("Loading from disk...");
             new_track = 0;
-            last_index = -1;
             queue_post(&audio_queue, AUDIO_PLAY, 0);
             return false;
         }
@@ -1557,12 +1545,7 @@ bool codec_request_next_track_callback(void)
     
     /* Advance to previous track. */
     else if (ci.reload_codec && new_track < 0) {
-        if (!playlist_check(new_track)) {
-            ci.reload_codec = false;
-            return false;
-        }
         last_peek_offset++;
-        playlist_next(new_track);
         if (--track_ridx < 0)
             track_ridx = MAX_TRACK-1;
         if (tracks[track_ridx].filesize == 0 || 
@@ -1570,7 +1553,6 @@ bool codec_request_next_track_callback(void)
             /*+ (off_t)tracks[track_ridx].codecsize*/ > filebuflen) {
             logf("Loading from disk...");
             new_track = 0;
-            last_index = -1;
             queue_post(&audio_queue, AUDIO_PLAY, 0);
             return false;
         }
@@ -1597,7 +1579,6 @@ bool codec_request_next_track_callback(void)
             logf("No more tracks [2]");
             ci.stop_codec = true;
             new_track = 0;
-            last_index = -1;
             queue_post(&audio_queue, AUDIO_PLAY, 0);
             return false;
         }
@@ -1652,7 +1633,6 @@ static void initiate_track_change(int peek_index)
 
     /* Detect if disk is spinning.. */
     if (filling) {
-        playlist_next(peek_index);
         queue_post(&audio_queue, AUDIO_PLAY, 0);
     } else {
         new_track = peek_index;
@@ -1677,35 +1657,49 @@ static void initiate_dir_change(int direction)
 void audio_thread(void)
 {
     struct event ev;
+    int last_tick = 0;
+    bool play_pending = false;
     
     while (1) {
-        yield_codecs();
-
-        audio_check_buffer();
+        if (!play_pending)
+        {
+            yield_codecs();
+            audio_check_buffer();
+        }
+        else
+        {
+            // ata_spin();
+            sleep(1);
+        }
         
         queue_wait_w_tmo(&audio_queue, &ev, 0);
+        if (ev.id == SYS_TIMEOUT && play_pending)
+        {
+            ev.id = AUDIO_PLAY;
+            ev.data = 0;
+        }
+        
         switch (ev.id) {
             case AUDIO_PLAY:
-                 /* Refuse to start playback if we are already playing
-                    the requested track. This is needed because when skipping
-                    tracks fast, AUDIO_PLAY commands will get queued with the
-                    the same track and playback will stutter. */
-                if (last_index == playlist_get_display_index() && playing
-                    && pcm_is_playing()) {
-                    logf("already playing req. track");
+                /* Don't start playing immediately if user is skipping tracks
+                 * fast to prevent UI lag. */
+                track_count = 0;
+                last_peek_offset = 0;
+                if (current_tick - last_tick < HZ/2)
+                {
+                    play_pending = true;
                     break ;
                 }
-                
+                play_pending = false;
+            
                 /* Do not start crossfading if audio is paused. */
-                if (paused) {
-                    audio_stop_playback();
-                    paused = false;
-                }
+                if (paused)
+                    pcmbuf_play_stop();
 
 #ifdef CONFIG_TUNER
                 /* check if radio is playing */
-                if(radio_get_status() != FMRADIO_OFF){
-		    radio_stop();
+                if (radio_get_status() != FMRADIO_OFF) {
+                    radio_stop();
                 }
 #endif
             
@@ -1751,15 +1745,13 @@ void audio_thread(void)
             
             case AUDIO_NEXT:
                 logf("audio_next");
-                if (global_settings.beep)
-                    pcmbuf_beep(5000, 100, 2500*global_settings.beep);
+                last_tick = current_tick;
                 initiate_track_change(1);
                 break ;
                 
             case AUDIO_PREV:
                 logf("audio_prev");
-                if (global_settings.beep)
-                    pcmbuf_beep(5000, 100, 2500*global_settings.beep);
+                last_tick = current_tick;
                 initiate_track_change(-1);
                 break;
                 
@@ -1793,7 +1785,7 @@ void audio_thread(void)
                 //    audio_change_track();
                 break ;
 
-#ifndef SIMULATOR                
+#ifndef SIMULATOR
             case SYS_USB_CONNECTED:
                 logf("USB: Audio core");
                 audio_stop_playback();
@@ -1973,12 +1965,28 @@ void voice_init(void)
 
 struct mp3entry* audio_current_track(void)
 {
-    // logf("audio_current_track");
+    const char *filename;
+    const char *p;
+    static struct mp3entry temp_id3;
     
     if (track_count > 0 && cur_ti->taginfo_ready)
         return (struct mp3entry *)&cur_ti->id3;
-    else
-        return NULL;
+    else {
+        filename = playlist_peek(0);
+        if (!filename)
+            filename = "No file!";
+        p = strrchr(filename, '/');
+        if (!p)
+            p = filename;
+        else
+            p++;
+        
+        memset(&temp_id3, 0, sizeof(struct mp3entry));
+        strncpy(temp_id3.path, p, sizeof(temp_id3.path)-1);
+        temp_id3.title = &temp_id3.path[0];
+
+        return &temp_id3;
+    }
 }
 
 struct mp3entry* audio_next_track(void)
@@ -1994,16 +2002,12 @@ struct mp3entry* audio_next_track(void)
     if (!tracks[next_idx].taginfo_ready)
         return NULL;
         
-    //logf("audio_next_track");
-    
     return &tracks[next_idx].id3;
 }
 
 bool audio_has_changed_track(void)
 {
-    if (track_changed && track_count > 0 && playing) {
-        if (!cur_ti->taginfo_ready)
-            return false;
+    if (track_changed) {
         track_changed = false;
         return true;
     }
@@ -2014,7 +2018,6 @@ bool audio_has_changed_track(void)
 void audio_play(int offset)
 {
     logf("audio_play");
-    last_index = -1;
     queue_post(&audio_queue, AUDIO_PLAY, (void *)offset);
 }
 
@@ -2043,11 +2046,37 @@ void audio_resume(void)
 
 void audio_next(void)
 {
+    /* Prevent UI lag and update the WPS immediately. */
+    if (global_settings.beep)
+        pcmbuf_beep(5000, 100, 2500*global_settings.beep);
+
+    if (!playlist_check(1))
+        return ;
+    playlist_next(1);
+    track_changed = true;
+    
+    /* Force WPS to update even if audio thread is blocked spinning. */
+    if (mutex_bufferfill.locked)
+        cur_ti->taginfo_ready = false;
+    
     queue_post(&audio_queue, AUDIO_NEXT, 0);
 }
 
 void audio_prev(void)
 {
+    /* Prevent UI lag and update the WPS immediately. */
+    if (global_settings.beep)
+        pcmbuf_beep(5000, 100, 2500*global_settings.beep);
+
+    if (!playlist_check(-1))
+        return ;
+    playlist_next(-1);
+    track_changed = true;
+    
+    /* Force WPS to update even if audio thread is blocked spinning. */
+    if (mutex_bufferfill.locked)
+        cur_ti->taginfo_ready = false;
+    
     queue_post(&audio_queue, AUDIO_PREV, 0);
 }
 
diff --git a/apps/playlist.c b/apps/playlist.c
index a2f46cf..ee09eec 100644
--- a/apps/playlist.c
+++ b/apps/playlist.c
@@ -86,6 +86,9 @@
 #include "button.h"
 #include "filetree.h"
 #include "abrepeat.h"
+#include "dircache.h"
+#include "thread.h"
+#include "usb.h"
 #ifdef HAVE_LCD_BITMAP
 #include "icons.h"
 #include "widgets.h"
@@ -162,7 +165,7 @@ static int get_next_index(const struct playlist_info* playlist, int steps,
 static void find_and_set_playlist_index(struct playlist_info* playlist,
                                         unsigned int seek);
 static int compare(const void* p1, const void* p2);
-static int get_filename(struct playlist_info* playlist, int seek,
+static int get_filename(struct playlist_info* playlist, int index, int seek,
                         bool control_file, char *buf, int buf_length);
 static int get_next_directory(char *dir);
 static int get_next_dir(char *dir, bool is_forward, bool recursion);
@@ -175,6 +178,14 @@ static void display_buffer_full(void);
 static int flush_pending_control(struct playlist_info* playlist);
 static int rotate_index(const struct playlist_info* playlist, int index);
 
+#ifdef HAVE_DIRCACHE
+#define PLAYLIST_LOAD_POINTERS 1
+
+static struct event_queue playlist_queue;
+static long playlist_stack[(DEFAULT_STACK_SIZE + 0x400)/sizeof(long)];
+static const char playlist_thread_name[] = "playlist cachectrl";
+#endif
+
 /*
  * remove any files and indices associated with the playlist
  */
@@ -394,11 +405,15 @@ static int add_indices_to_playlist(struct playlist_info* playlist,
                 {
                     /* Store a new entry */
                     playlist->indices[ playlist->amount ] = i+count;
-                    playlist->amount++;
+#ifdef HAVE_DIRCACHE
+                    if (playlist->filenames)
+                        playlist->filenames[ playlist->amount ] = NULL;
+#endif
                     if ( playlist->amount >= playlist->max_playlist_size ) {
                         display_buffer_full();
                         return -1;
                     }
+                    playlist->amount++;
                 }
             }
         }
@@ -406,6 +421,10 @@ static int add_indices_to_playlist(struct playlist_info* playlist,
         i+= count;
     }
 
+#ifdef HAVE_DIRCACHE
+    queue_post(&playlist_queue, PLAYLIST_LOAD_POINTERS, 0);
+#endif
+
     return 0;
 }
 
@@ -499,8 +518,14 @@ static int add_track_to_playlist(struct playlist_info* playlist,
 
     /* shift indices so that track can be added */
     for (i=playlist->amount; i>insert_position; i--)
+    {
         playlist->indices[i] = playlist->indices[i-1];
-
+#ifdef HAVE_DIRCACHE
+        if (playlist->filenames)
+            playlist->filenames[i] = playlist->filenames[i-1];
+#endif
+    }
+    
     /* update stored indices if needed */
     if (playlist->amount > 0 && insert_position <= playlist->index)
         playlist->index++;
@@ -554,6 +579,12 @@ static int add_track_to_playlist(struct playlist_info* playlist,
 
     playlist->indices[insert_position] = flags | seek_pos;
 
+#ifdef HAVE_DIRCACHE
+    if (playlist->filenames)
+        playlist->filenames[insert_position] = NULL;
+    queue_post(&playlist_queue, PLAYLIST_LOAD_POINTERS, 0);
+#endif
+
     playlist->amount++;
     playlist->num_inserted_tracks++;
 
@@ -693,7 +724,13 @@ static int remove_track_from_playlist(struct playlist_info* playlist,
 
     /* shift indices now that track has been removed */
     for (i=position; i<playlist->amount; i++)
+    {
         playlist->indices[i] = playlist->indices[i+1];
+#ifdef HAVE_DIRCACHE
+        if (playlist->filenames)
+            playlist->filenames[i] = playlist->filenames[i+1];
+#endif
+    }
 
     playlist->amount--;
 
@@ -780,6 +817,14 @@ static int randomise_playlist(struct playlist_info* playlist,
         store = playlist->indices[candidate];
         playlist->indices[candidate] = playlist->indices[count];
         playlist->indices[count] = store;
+#ifdef HAVE_DIRCACHE
+        if (playlist->filenames)
+        {
+            store = (int)playlist->filenames[candidate];
+            playlist->filenames[candidate] = playlist->filenames[count];
+            playlist->filenames[count] = (struct dircache_entry *)store;
+        }
+#endif
     }
 
     if (start_current)
@@ -817,6 +862,13 @@ static int sort_playlist(struct playlist_info* playlist, bool start_current,
         qsort(playlist->indices, playlist->amount,
             sizeof(playlist->indices[0]), compare);
 
+#ifdef HAVE_DIRCACHE
+    /** We need to re-check the song names from disk because qsort can't
+     * sort two arrays at once :/
+     * FIXME: Please implement a better way to do this. */
+    queue_post(&playlist_queue, PLAYLIST_LOAD_POINTERS, 0);
+#endif
+
     if (start_current)
         find_and_set_playlist_index(playlist, current);
 
@@ -1040,10 +1092,88 @@ static int compare(const void* p1, const void* p2)
         return *e1 - *e2;
 }
 
+#ifdef HAVE_DIRCACHE
+/**
+ * Thread to update filename pointers to dircache on background
+ * without affecting playlist load up performance.
+ */
+static void playlist_thread(void)
+{
+    struct event ev;
+    bool dirty_pointers = false;
+    static char tmp[MAX_PATH+1];
+
+    struct playlist_info *playlist;
+    int index;
+    int seek;
+    bool control_file;
+
+    while (1)
+    {
+        queue_wait_w_tmo(&playlist_queue, &ev, HZ*5);
+
+        switch (ev.id)
+        {
+            case PLAYLIST_LOAD_POINTERS:
+                dirty_pointers = true;
+                break ;
+
+            /* Start the background scanning after 5s. */
+            case SYS_TIMEOUT:
+                if (!dirty_pointers)
+                    break ;
+
+                playlist = &current_playlist;
+                if (!dircache_is_enabled() || !playlist->filenames
+                     || playlist->amount <= 0)
+                    break ;
+
+#ifdef HAVE_ADJUSTABLE_CPU_FREQ
+                cpu_boost(true);
+#endif
+                for (index = 0; index < playlist->amount
+                     && queue_empty(&playlist_queue); index++)
+                {
+                    /* Process only pointers that are not already loaded. */
+                    if (playlist->filenames[index])
+                        continue ;
+                    
+                    control_file = playlist->indices[index] & PLAYLIST_INSERT_TYPE_MASK;
+                    seek = playlist->indices[index] & PLAYLIST_SEEK_MASK;
+
+                    /* Load the filename from playlist file. */
+                    if (get_filename(playlist, index, seek, control_file, tmp,
+                        sizeof(tmp)) < 0)
+                        break ;
+
+                    /* Set the dircache entry pointer. */
+                    playlist->filenames[index] = dircache_get_entry_ptr(tmp);
+
+                    /* And be on background so user doesn't notice any delays. */
+                    yield();
+                }
+
+#ifdef HAVE_ADJUSTABLE_CPU_FREQ
+                cpu_boost(false);
+#endif
+                dirty_pointers = false;
+                break ;
+            
+#ifndef SIMULATOR
+            case SYS_USB_CONNECTED:
+                usb_acknowledge(SYS_USB_CONNECTED_ACK);
+                usb_wait_for_disconnect(&playlist_queue);
+                break ;
+#endif
+        }
+    }
+}
+#endif
+
 /*
  * gets pathname for track at seek index
  */
-static int get_filename(struct playlist_info* playlist, int seek,
+static int get_filename(struct playlist_info* playlist, int index, int seek,
                         bool control_file, char *buf, int buf_length)
 {
     int fd;
@@ -1054,13 +1184,26 @@ static int get_filename(struct playlist_info* playlist, int seek,
     if (buf_length > MAX_PATH+1)
         buf_length = MAX_PATH+1;
 
-    if (playlist->in_ram && !control_file)
+#ifdef HAVE_DIRCACHE
+    if (dircache_is_enabled() && playlist->filenames)
+    {
+        if (playlist->filenames[index] != NULL)
+        {
+            dircache_copy_path(playlist->filenames[index], tmp_buf, sizeof(tmp_buf)-1);
+            max = strlen(tmp_buf) + 1;
+        }
+    }
+#else
+    (void)index;
+#endif
+    
+    if (playlist->in_ram && !control_file && max < 0)
     {
         strncpy(tmp_buf, &playlist->buffer[seek], sizeof(tmp_buf));
         tmp_buf[MAX_PATH] = '\0';
         max = strlen(tmp_buf) + 1;
     }
-    else
+    else if (max < 0)
     {
         if (control_file)
             fd = playlist->control_fd;
@@ -1482,6 +1625,16 @@ void playlist_init(void)
     playlist->buffer = buffer_alloc(playlist->buffer_size);
     mutex_init(&playlist->control_mutex);
     empty_playlist(playlist, true);
+
+#ifdef HAVE_DIRCACHE
+    playlist->filenames = buffer_alloc(
+        playlist->max_playlist_size * sizeof(int));
+    memset(playlist->filenames, 0,
+           playlist->max_playlist_size * sizeof(int));
+    create_thread(playlist_thread, playlist_stack, sizeof(playlist_stack),
+                  playlist_thread_name);
+    queue_init(&playlist_queue);
+#endif
 }
 
 /*
@@ -1906,8 +2059,9 @@ int playlist_add(const char *filename)
         return -1;
     }
 
-    playlist->indices[playlist->amount++] = playlist->buffer_end_pos;
-
+    playlist->indices[playlist->amount] = playlist->buffer_end_pos;
+    playlist->amount++;
+    
     strcpy(&playlist->buffer[playlist->buffer_end_pos], filename);
     playlist->buffer_end_pos += len;
     playlist->buffer[playlist->buffer_end_pos++] = '\0';
@@ -1991,7 +2145,7 @@ char* playlist_peek(int steps)
     control_file = playlist->indices[index] & PLAYLIST_INSERT_TYPE_MASK;
     seek = playlist->indices[index] & PLAYLIST_SEEK_MASK;
 
-    if (get_filename(playlist, seek, control_file, now_playing,
+    if (get_filename(playlist, index, seek, control_file, now_playing,
             MAX_PATH+1) < 0)
         return NULL;
 
@@ -2003,11 +2157,21 @@ char* playlist_peek(int steps)
            (workaround for buggy playlist creation tools) */
         while (temp_ptr)
         {
-            fd = open(temp_ptr, O_RDONLY);
-            if (fd >= 0)
+#ifdef HAVE_DIRCACHE
+            if (dircache_is_enabled())
             {
-                close(fd);
-                break;
+                if (dircache_get_entry_ptr(temp_ptr))
+                    break;
+            }
+            else
+#endif
+            {
+                fd = open(temp_ptr, O_RDONLY);
+                if (fd >= 0)
+                {
+                    close(fd);
+                    break;
+                }
             }
             
             temp_ptr = strchr(temp_ptr+1, '/');
@@ -2278,16 +2442,26 @@ int playlist_create_ex(struct playlist_info* playlist,
         {
             int num_indices = index_buffer_size / sizeof(int);
 
+#ifdef HAVE_DIRCACHE
+            num_indices /= 2;
+#endif
             if (num_indices > global_settings.max_files_in_playlist)
                 num_indices = global_settings.max_files_in_playlist;
 
             playlist->max_playlist_size = num_indices;
             playlist->indices = index_buffer;
+#ifdef HAVE_DIRCACHE
+            playlist->filenames = (const struct dircache_entry **)
+                &playlist->indices[num_indices];
+#endif
         }
         else
         {
             playlist->max_playlist_size = current_playlist.max_playlist_size;
             playlist->indices = current_playlist.indices;
+#ifdef HAVE_DIRCACHE
+            playlist->filenames = current_playlist.filenames;
+#endif
         }
 
         playlist->buffer_size = 0;
@@ -2336,9 +2510,15 @@ int playlist_set_current(struct playlist_info* playlist)
     current_playlist.dirlen = playlist->dirlen;
 
     if (playlist->indices && playlist->indices != current_playlist.indices)
+    {
         memcpy(current_playlist.indices, playlist->indices,
-            playlist->max_playlist_size*sizeof(int));
-
+               playlist->max_playlist_size*sizeof(int));
+#ifdef HAVE_DIRCACHE
+        memcpy(current_playlist.filenames, playlist->filenames,
+               playlist->max_playlist_size*sizeof(int));
+#endif
+    }
+    
     current_playlist.first_index = playlist->first_index;
     current_playlist.amount = playlist->amount;
     current_playlist.last_insert_pos = playlist->last_insert_pos;
@@ -2620,7 +2800,7 @@ int playlist_move(struct playlist_info* playlist, int index, int new_index)
     queue = playlist->indices[index] & PLAYLIST_QUEUE_MASK;
     seek = playlist->indices[index] & PLAYLIST_SEEK_MASK;
 
-    if (get_filename(playlist, seek, control_file, filename,
+    if (get_filename(playlist, index, seek, control_file, filename,
             sizeof(filename)) < 0)
         return -1;
 
@@ -2812,7 +2992,7 @@ int playlist_get_track_info(struct playlist_info* playlist, int index,
     control_file = playlist->indices[index] & PLAYLIST_INSERT_TYPE_MASK;
     seek = playlist->indices[index] & PLAYLIST_SEEK_MASK;
 
-    if (get_filename(playlist, seek, control_file, info->filename,
+    if (get_filename(playlist, index, seek, control_file, info->filename,
             sizeof(info->filename)) < 0)
         return -1;
 
@@ -2883,7 +3063,7 @@ int playlist_save(struct playlist_info* playlist, char *filename)
         /* Don't save queued files */
         if (!queue)
         {
-            if (get_filename(playlist, seek, control_file, tmp_buf,
+            if (get_filename(playlist, index, seek, control_file, tmp_buf,
                     MAX_PATH+1) < 0)
             {
                 result = -1;
diff --git a/apps/playlist.h b/apps/playlist.h
index efac303..286823e 100644
--- a/apps/playlist.h
+++ b/apps/playlist.h
@@ -36,7 +36,8 @@ struct playlist_info
     int  control_fd;     /* descriptor of the open control file     */
     bool control_created; /* has control file been created?         */
     int  dirlen;         /* Length of the path to the playlist file */
-    unsigned long *indices; /* array of indices                      */
+    unsigned long *indices; /* array of indices                     */
+    const struct dircache_entry **filenames; /* Entries from dircache */
     int  max_playlist_size; /* Max number of files in playlist. Mirror of
                               global_settings.max_files_in_playlist */
     bool in_ram;         /* playlist stored in ram (dirplay)        */
diff --git a/apps/wps.c b/apps/wps.c
index 266c506..573444f 100644
--- a/apps/wps.c
+++ b/apps/wps.c
@@ -597,6 +597,7 @@ long wps_show(void)
 #endif
 #endif
                 left_lastclick = current_tick;
+                update_track = true;
 
 #ifdef AB_REPEAT_ENABLE
                 /* if we're in A/B repeat mode and the current position
@@ -604,7 +605,6 @@ long wps_show(void)
                 if ( ab_repeat_mode_enabled() && ab_after_A_marker(id3->elapsed) )
                 {
                     ab_jump_to_A_marker();
-                    update_track = true;
                     break;
                 }
                 /* ...otherwise, do it normally */
@@ -655,6 +655,7 @@ long wps_show(void)
 #endif
 #endif
                 right_lastclick = current_tick;
+                update_track = true;
 
 #ifdef AB_REPEAT_ENABLE
                 /* if we're in A/B repeat mode and the current position is
@@ -662,7 +663,6 @@ long wps_show(void)
                 if ( ab_repeat_mode_enabled() && ab_before_A_marker(id3->elapsed) )
                 {
                     ab_jump_to_A_marker();
-                    update_track = true;
                     break;
                 }
                 /* ...otherwise, do it normally */
diff --git a/firmware/common/dircache.c b/firmware/common/dircache.c
index fa24321..259c34c 100644
--- a/firmware/common/dircache.c
+++ b/firmware/common/dircache.c
@@ -77,6 +77,7 @@ static struct dircache_entry* allocate_entry(void)
     dircache_size += sizeof(struct dircache_entry);
     next_entry->name_len = 0;
     next_entry->d_name = NULL;
+    next_entry->up = NULL;
     next_entry->down = NULL;
     next_entry->next = NULL;
 
@@ -88,6 +89,7 @@ static struct dircache_entry* dircache_gen_next(struct dircache_entry *ce)
     struct dircache_entry *next_entry;
 
     next_entry = allocate_entry();
+    next_entry->up = ce->up;
     ce->next = next_entry;
     
     return next_entry;
@@ -98,6 +100,7 @@ static struct dircache_entry* dircache_gen_down(struct dircache_entry *ce)
     struct dircache_entry *next_entry;
 
     next_entry = allocate_entry();
+    next_entry->up = ce;
     ce->down = next_entry;
     
     return next_entry;
@@ -176,6 +179,7 @@ static int dircache_travel(struct fat_dir *dir, struct dircache_entry *ce)
     int depth = 0;
     int result;
 
+    memset(ce, 0, sizeof(struct dircache_entry));
     dir_recursion[0].dir = dir;
     dir_recursion[0].ce = ce;
     
@@ -517,6 +521,43 @@ void dircache_disable(void)
     logf("Cache released");
 }
 
+const struct dircache_entry *dircache_get_entry_ptr(const char *filename)
+{
+    if (!dircache_initialized || filename == NULL)
+        return NULL;
+    
+    return dircache_get_entry(filename, false, false);
+}
+
+void dircache_copy_path(const struct dircache_entry *entry, char *buf, int size)
+{
+    const struct dircache_entry *down[MAX_SCAN_DEPTH];
+    int depth = 0;
+    
+    if (size <= 0)
+        return ;
+    
+    buf[0] = '\0';
+    
+    if (entry == NULL)
+        return ;
+    
+    do {
+        down[depth] = entry;
+        entry = entry->up;
+        depth++;
+    } while (entry != NULL && depth < MAX_SCAN_DEPTH);
+    
+    while (--depth >= 0)
+    {
+        snprintf(buf, size, "/%s", down[depth]->d_name);
+        buf += down[depth]->name_len; /* '/' + d_name */
+        size -= down[depth]->name_len;
+        if (size <= 0)
+            break ;
+    }
+}
+
 /* --- Directory cache live updating functions --- */
 static struct dircache_entry* dircache_new_entry(const char *path, int attribute)
 {
diff --git a/firmware/include/dircache.h b/firmware/include/dircache.h
index 48b74e0..11d7335 100644
--- a/firmware/include/dircache.h
+++ b/firmware/include/dircache.h
@@ -47,6 +47,7 @@ struct dircache_maindata {
 /* Exported structures. */
 struct dircache_entry {
     struct dircache_entry *next;
+    struct dircache_entry *up;
     struct dircache_entry *down;
     int attribute;
     long size;
@@ -71,6 +72,8 @@ int dircache_build(int last_size);
 bool dircache_is_enabled(void);
 int dircache_get_cache_size(void);
 void dircache_disable(void);
+const struct dircache_entry *dircache_get_entry_ptr(const char *filename);
+void dircache_copy_path(const struct dircache_entry *entry, char *buf, int size);
 
 void dircache_bind(int fd, const char *path);
 void dircache_update_filesize(int fd, long newsize);