Added resume. Works in dirs and playlists, shuffled or not. Resumes mid-song, but press pause on players before you shutdown so they get a chance to store the position on disk. Recorders use RTC ram. Todo: Time display is wrong after mid-track resume and ffd/rew is not handled.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1787 a1c6a512-1295-4272-9138-f99709370657

12 files changed, 377 insertions, 142 deletions

diff --git a/apps/playlist.c b/apps/playlist.c
index 0cb9d09..f308139 100644
--- a/apps/playlist.c
+++ b/apps/playlist.c
@@ -66,7 +66,7 @@ int playlist_add(char *filename)
     return 0;
 }
 
-char* playlist_next(int steps)
+char* playlist_next(int steps, int* index)
 {
     int seek;
     int max;
@@ -103,7 +103,9 @@ char* playlist_next(int steps)
         else
             return NULL;
     }
-    
+
+    if (index)
+        *index = playlist.index;
 
     /* Zero-terminate the file name */
     seek=0;
@@ -165,7 +167,11 @@ char* playlist_next(int steps)
     }
 }
 
-void play_list(char *dir, char *file, int start_index)
+void play_list(char *dir,
+               char *file, 
+               int start_index, 
+               int start_offset, 
+               int random_seed )
 {
     char *sep="";
     int dirlen;
@@ -211,7 +217,7 @@ void play_list(char *dir, char *file, int start_index)
             status_draw();
             lcd_update();
         }
-        randomise_playlist( current_tick );
+        randomise_playlist( random_seed );
     }
 
     if(!playlist.in_ram) {
@@ -220,7 +226,7 @@ void play_list(char *dir, char *file, int start_index)
         lcd_update();
     }
     /* also make the first song get playing */
-    mpeg_play(playlist_next(0));
+    mpeg_play(start_offset);
 }
 
 /*
diff --git a/apps/playlist.h b/apps/playlist.h
index 312964f..e0c0841 100644
--- a/apps/playlist.h
+++ b/apps/playlist.h
@@ -40,8 +40,9 @@ typedef struct
 extern playlist_info_t playlist;
 extern bool playlist_shuffle;
 
-void play_list(char *dir, char *file, int start_index);
-char* playlist_next(int steps);
+void play_list(char *dir, char *file, int start_index, 
+               int start_offset, int random_seed );
+char* playlist_next(int steps, int* id);
 void randomise_playlist( unsigned int seed );
 void sort_playlist(void);
 void empty_playlist(void);
diff --git a/apps/settings.c b/apps/settings.c
index f8b6870..41d04c2 100644
--- a/apps/settings.c
+++ b/apps/settings.c
@@ -37,10 +37,9 @@
 
 struct user_settings global_settings;
 
-static unsigned short last_checksum = 0;
-
 #define CONFIG_BLOCK_VERSION 1
-#define CONFIG_BLOCK_SIZE 44
+#define CONFIG_BLOCK_SIZE 512
+#define RTC_BLOCK_SIZE 44
 
 /********************************************
 
@@ -64,6 +63,8 @@ offset  abs
 0x0f    0x23    <scroll speed & WPS display byte>
 0x10    0x24    <playlist options byte>
 0x11    0x25    <AVC byte>
+0x12    0x26    <(int) Resume playlist index, or -1 if no playlist resume>
+0x16    0x2b    <(int) Byte offset into resume file>
 
         <all unused space filled with 0xff>
 
@@ -81,24 +82,30 @@ location used, and reset the setting in question with a factory default if
 needed. Memory locations not used by a given version should not be
 modified unless the header & checksum test fails.
 
+
+Rest of config block, only saved to disk:
+
+0xF8  (int) Playlist shuffle seed
+0xFC  (char[260]) Resume playlist (path/to/dir or path/to/playlist.m3u)
+
 *************************************/
 
 #include "rtc.h"
-static unsigned char rtc_config_block[CONFIG_BLOCK_SIZE];
+static unsigned char config_block[CONFIG_BLOCK_SIZE];
 
 /*
- * Calculates the checksum for the config block and places it in the given 2-byte buffer
+ * Calculates the checksum for the config block and returns it
  */
 
-static unsigned short calculate_config_checksum(void)
+static unsigned short calculate_config_checksum(unsigned char* buf)
 {
     unsigned int i;
     unsigned char cksum[2];
     cksum[0] = cksum[1] = 0;
     
-    for (i=0; i < CONFIG_BLOCK_SIZE - 2; i+=2 ) {
-        cksum[0] ^= rtc_config_block[i];
-        cksum[1] ^= rtc_config_block[i+1];
+    for (i=0; i < RTC_BLOCK_SIZE - 2; i+=2 ) {
+        cksum[0] ^= buf[i];
+        cksum[1] ^= buf[i+1];
     }
 
     return (cksum[0] << 8) | cksum[1];
@@ -112,12 +119,12 @@ static void init_config_buffer( void )
     DEBUGF( "init_config_buffer()\n" );
     
     /* reset to 0xff - all unused */
-    memset(rtc_config_block, 0xff, CONFIG_BLOCK_SIZE);
+    memset(config_block, 0xff, CONFIG_BLOCK_SIZE);
     /* insert header */
-    rtc_config_block[0] = 'R';
-    rtc_config_block[1] = 'o';
-    rtc_config_block[2] = 'c';
-    rtc_config_block[3] = CONFIG_BLOCK_VERSION;
+    config_block[0] = 'R';
+    config_block[1] = 'o';
+    config_block[2] = 'c';
+    config_block[3] = CONFIG_BLOCK_VERSION;
 }
 
 /*
@@ -126,7 +133,6 @@ static void init_config_buffer( void )
 static int save_config_buffer( void )
 {
     unsigned short chksum;
-
 #ifdef HAVE_RTC
     unsigned int i;
 #endif
@@ -134,36 +140,29 @@ static int save_config_buffer( void )
     DEBUGF( "save_config_buffer()\n" );
     
     /* update the checksum in the end of the block before saving */
-    chksum = calculate_config_checksum();
-    rtc_config_block[ CONFIG_BLOCK_SIZE - 2 ] = chksum >> 8;
-    rtc_config_block[ CONFIG_BLOCK_SIZE - 1 ] = chksum & 0xff;
-
-    /* don't save if no changes were made */
-    if ( chksum == last_checksum )
-        return 0;
-    last_checksum = chksum;
+    chksum = calculate_config_checksum(config_block);
+    config_block[ RTC_BLOCK_SIZE - 2 ] = chksum >> 8;
+    config_block[ RTC_BLOCK_SIZE - 1 ] = chksum & 0xff;
 
 #ifdef HAVE_RTC    
     /* FIXME: okay, it _would_ be cleaner and faster to implement rtc_write so
        that it would write a number of bytes at a time since the RTC chip
        supports that, but this will have to do for now 8-) */
-    for (i=0; i < CONFIG_BLOCK_SIZE; i++ ) {
-        int r = rtc_write(0x14+i, rtc_config_block[i]);
+    for (i=0; i < RTC_BLOCK_SIZE; i++ ) {
+        int r = rtc_write(0x14+i, config_block[i]);
         if (r) {
             DEBUGF( "save_config_buffer: rtc_write failed at addr 0x%02x: %d\n", 14+i, r );
             return r;
         }
     }
 
-#else
+#endif
 
-    if(battery_level_safe() && (fat_startsector()!=0))
-        ata_delayed_write( 61, rtc_config_block);
+    if (fat_startsector() != 0)
+        ata_delayed_write( 61, config_block);
     else
         return -1;
 
-#endif
-
     return 0;
 }
 
@@ -173,40 +172,61 @@ static int save_config_buffer( void )
 static int load_config_buffer( void )
 {
     unsigned short chksum;
+    bool correct = false;
 
 #ifdef HAVE_RTC
     unsigned int i;
+    unsigned char rtc_block[RTC_BLOCK_SIZE];
 #endif
     
     DEBUGF( "load_config_buffer()\n" );
 
+    if (fat_startsector() != 0) {
+        ata_read_sectors( 61, 1,  config_block);
+
+        /* calculate the checksum, check it and the header */
+        chksum = calculate_config_checksum(config_block);
+        
+        if (config_block[0] == 'R' &&
+            config_block[1] == 'o' &&
+            config_block[2] == 'c' &&
+            config_block[3] == CONFIG_BLOCK_VERSION &&
+            (chksum >> 8) == config_block[RTC_BLOCK_SIZE - 2] &&
+            (chksum & 0xff) == config_block[RTC_BLOCK_SIZE - 1])
+        {
+            DEBUGF( "load_config_buffer: header & checksum test ok\n" );
+            correct = true;
+        }
+    }
+
 #ifdef HAVE_RTC    
-    /* FIXME: the same comment applies here as for rtc_write */
-    for (i=0; i < CONFIG_BLOCK_SIZE; i++ )
-        rtc_config_block[i] = rtc_read(0x14+i);
-#else
-    ata_read_sectors( 61, 1,  rtc_config_block);
-#endif
-    
-    /* calculate the checksum, check it and the header */
-    chksum = calculate_config_checksum();
+    /* read rtc block */
+    for (i=0; i < RTC_BLOCK_SIZE; i++ )
+        rtc_block[i] = rtc_read(0x14+i);
+
+    chksum = calculate_config_checksum(rtc_block);
     
-    if (rtc_config_block[0] == 'R' &&
-        rtc_config_block[1] == 'o' &&
-        rtc_config_block[2] == 'c' &&
-        rtc_config_block[3] == CONFIG_BLOCK_VERSION &&
-        (chksum >> 8) == rtc_config_block[CONFIG_BLOCK_SIZE - 2] &&
-        (chksum & 0xff) == rtc_config_block[CONFIG_BLOCK_SIZE - 1])
+    /* if rtc block is ok, use that */
+    if (rtc_block[0] == 'R' &&
+        rtc_block[1] == 'o' &&
+        rtc_block[2] == 'c' &&
+        rtc_block[3] == CONFIG_BLOCK_VERSION &&
+        (chksum >> 8) == rtc_block[RTC_BLOCK_SIZE - 2] &&
+        (chksum & 0xff) == rtc_block[RTC_BLOCK_SIZE - 1])
     {
-        DEBUGF( "load_config_buffer: header & checksum test ok\n" );
-        last_checksum = chksum;
-        return 0; /* header and checksum is valid */
+        memcpy(config_block, rtc_block, RTC_BLOCK_SIZE);
+        correct = true;
     }
+#endif
     
-    /* if checksum is not valid, initialize the config buffer to all-unused */
-    DEBUGF( "load_config_buffer: header & checksum test failed\n" );
-    init_config_buffer();
-    return 1;
+    if ( !correct ) {
+        /* if checksum is not valid, clear the config buffer */
+        DEBUGF( "load_config_buffer: header & checksum test failed\n" );
+        init_config_buffer();
+        return -1;
+    }
+
+    return 0;
 }
 
 /*
@@ -218,33 +238,47 @@ int settings_save( void )
     
     /* update the config block buffer with current
        settings and save the block in the RTC */
-    rtc_config_block[0x4] = (unsigned char)global_settings.volume;
-    rtc_config_block[0x5] = (unsigned char)global_settings.balance;
-    rtc_config_block[0x6] = (unsigned char)global_settings.bass;
-    rtc_config_block[0x7] = (unsigned char)global_settings.treble;
-    rtc_config_block[0x8] = (unsigned char)global_settings.loudness;
-    rtc_config_block[0x9] = (unsigned char)global_settings.bass_boost;
+    config_block[0x4] = (unsigned char)global_settings.volume;
+    config_block[0x5] = (unsigned char)global_settings.balance;
+    config_block[0x6] = (unsigned char)global_settings.bass;
+    config_block[0x7] = (unsigned char)global_settings.treble;
+    config_block[0x8] = (unsigned char)global_settings.loudness;
+    config_block[0x9] = (unsigned char)global_settings.bass_boost;
     
-    rtc_config_block[0xa] = (unsigned char)global_settings.contrast;
-    rtc_config_block[0xb] = (unsigned char)global_settings.backlight;
-    rtc_config_block[0xc] = (unsigned char)global_settings.poweroff;
-    rtc_config_block[0xd] = (unsigned char)global_settings.resume;
+    config_block[0xa] = (unsigned char)global_settings.contrast;
+    config_block[0xb] = (unsigned char)global_settings.backlight;
+    config_block[0xc] = (unsigned char)global_settings.poweroff;
+    config_block[0xd] = (unsigned char)global_settings.resume;
     
-    rtc_config_block[0xe] = (unsigned char)
+    config_block[0xe] = (unsigned char)
         ((global_settings.playlist_shuffle & 1) |
          ((global_settings.mp3filter & 1) << 1) |
          ((global_settings.sort_case & 1) << 2) |
          ((global_settings.discharge & 1) << 3) |
          ((global_settings.statusbar & 1) << 4));
 
-    rtc_config_block[0xf] = (unsigned char)
+    config_block[0xf] = (unsigned char)
         ((global_settings.scroll_speed << 3) |
          (global_settings.wps_display & 7));
     
-    rtc_config_block[0x11] = (unsigned char)global_settings.avc;
+    config_block[0x10] = (unsigned char)global_settings.ff_rewind;
+    config_block[0x11] = (unsigned char)global_settings.avc;
     
-    memcpy(&rtc_config_block[0x24], &global_settings.total_uptime, 4);
+    memcpy(&config_block[0x12], &global_settings.resume_index, 4);
+    memcpy(&config_block[0x16], &global_settings.resume_offset, 4);
+    memcpy(&config_block[0xF8], &global_settings.resume_seed, 4);
+
+    memcpy(&config_block[0x24], &global_settings.total_uptime, 4);
+    strncpy(&config_block[0xFC], global_settings.resume_file, MAX_PATH);
     
+    DEBUGF("+Resume file %s\n",global_settings.resume_file);
+    DEBUGF("+Resume index %X offset %X\n",
+           global_settings.resume_index,
+           global_settings.resume_offset);
+    DEBUGF("+Resume shuffle %s seed %X\n",
+           global_settings.playlist_shuffle?"on":"off",
+           global_settings.resume_seed);
+
     if(save_config_buffer())
     {
         lcd_clear_display();
@@ -277,51 +311,65 @@ void settings_load(void)
     /* load the buffer from the RTC (resets it to all-unused if the block
        is invalid) and decode the settings which are set in the block */
     if (!load_config_buffer()) {
-        if (rtc_config_block[0x4] != 0xFF)
-            global_settings.volume = rtc_config_block[0x4];
-        if (rtc_config_block[0x5] != 0xFF)
-            global_settings.balance = rtc_config_block[0x5];
-        if (rtc_config_block[0x6] != 0xFF)
-            global_settings.bass = rtc_config_block[0x6];
-        if (rtc_config_block[0x7] != 0xFF)
-            global_settings.treble = rtc_config_block[0x7];
-        if (rtc_config_block[0x8] != 0xFF)
-            global_settings.loudness = rtc_config_block[0x8];
-        if (rtc_config_block[0x9] != 0xFF)
-            global_settings.bass_boost = rtc_config_block[0x9];
+        if (config_block[0x4] != 0xFF)
+            global_settings.volume = config_block[0x4];
+        if (config_block[0x5] != 0xFF)
+            global_settings.balance = config_block[0x5];
+        if (config_block[0x6] != 0xFF)
+            global_settings.bass = config_block[0x6];
+        if (config_block[0x7] != 0xFF)
+            global_settings.treble = config_block[0x7];
+        if (config_block[0x8] != 0xFF)
+            global_settings.loudness = config_block[0x8];
+        if (config_block[0x9] != 0xFF)
+            global_settings.bass_boost = config_block[0x9];
     
-        if (rtc_config_block[0xa] != 0xFF) {
-            global_settings.contrast = rtc_config_block[0xa];
+        if (config_block[0xa] != 0xFF) {
+            global_settings.contrast = config_block[0xa];
             if ( global_settings.contrast < MIN_CONTRAST_SETTING )
                 global_settings.contrast = DEFAULT_CONTRAST_SETTING;
         }
-        if (rtc_config_block[0xb] != 0xFF)
-            global_settings.backlight = rtc_config_block[0xb];
-        if (rtc_config_block[0xc] != 0xFF)
-            global_settings.poweroff = rtc_config_block[0xc];
-        if (rtc_config_block[0xd] != 0xFF)
-            global_settings.resume = rtc_config_block[0xd];
-        if (rtc_config_block[0xe] != 0xFF) {
-            global_settings.playlist_shuffle = rtc_config_block[0xe] & 1;
-            global_settings.mp3filter = (rtc_config_block[0xe] >> 1) & 1;
-            global_settings.sort_case = (rtc_config_block[0xe] >> 2) & 1;
-            global_settings.discharge = (rtc_config_block[0xe] >> 3) & 1;
-            global_settings.statusbar = (rtc_config_block[0xe] >> 4) & 1;
+        if (config_block[0xb] != 0xFF)
+            global_settings.backlight = config_block[0xb];
+        if (config_block[0xc] != 0xFF)
+            global_settings.poweroff = config_block[0xc];
+        if (config_block[0xd] != 0xFF)
+            global_settings.resume = config_block[0xd];
+        if (config_block[0xe] != 0xFF) {
+            global_settings.playlist_shuffle = config_block[0xe] & 1;
+            global_settings.mp3filter = (config_block[0xe] >> 1) & 1;
+            global_settings.sort_case = (config_block[0xe] >> 2) & 1;
+            global_settings.discharge = (config_block[0xe] >> 3) & 1;
+            global_settings.statusbar = (config_block[0xe] >> 4) & 1;
         }
         
-        c = rtc_config_block[0xf] >> 3;
+        c = config_block[0xf] >> 3;
         if (c != 31)
             global_settings.scroll_speed = c;
 
-        c = rtc_config_block[0xf] & 7;
+        c = config_block[0xf] & 7;
         if (c != 7)
             global_settings.wps_display = c;
         
-        if (rtc_config_block[0x11] != 0xFF)
-            global_settings.avc = rtc_config_block[0x11];
+        if (config_block[0x10] != 0xFF)
+            global_settings.ff_rewind = config_block[0x10];
+
+        if (config_block[0x11] != 0xFF)
+            global_settings.avc = config_block[0x11];
+
+        if (config_block[0x12] != 0xFF)
+            memcpy(&global_settings.resume_index, &config_block[0x12], 4);
+
+        if (config_block[0x16] != 0xFF)
+            memcpy(&global_settings.resume_offset, &config_block[0x16], 4);
+
+        memcpy(&global_settings.resume_seed, &config_block[0xF8], 4);
+
+        if (config_block[0x24] != 0xFF)
+            memcpy(&global_settings.total_uptime, &config_block[0x24], 4);
 
-        if (rtc_config_block[0x24] != 0xFF)
-            memcpy(&global_settings.total_uptime, &rtc_config_block[0x24], 4);
+        strncpy(global_settings.resume_file, &config_block[0xFC], MAX_PATH);
+        global_settings.resume_file[MAX_PATH]=0;
     }
     lcd_set_contrast(global_settings.contrast);
     lcd_scroll_speed(global_settings.scroll_speed);
@@ -345,6 +393,7 @@ void settings_reset(void) {
     global_settings.loudness    = mpeg_sound_default(SOUND_LOUDNESS);
     global_settings.bass_boost  = mpeg_sound_default(SOUND_SUPERBASS);
     global_settings.avc         = mpeg_sound_default(SOUND_AVC);
+    global_settings.resume      = true;
     global_settings.contrast    = DEFAULT_CONTRAST_SETTING;
     global_settings.poweroff    = DEFAULT_POWEROFF_SETTING;
     global_settings.backlight   = DEFAULT_BACKLIGHT_SETTING;
@@ -358,6 +407,8 @@ void settings_reset(void) {
     global_settings.total_uptime = 0;
     global_settings.scroll_speed = 8;
     global_settings.ff_rewind    = DEFAULT_FF_REWIND_SETTING;
+    global_settings.resume_index = -1;
+    global_settings.resume_offset = -1;
 }
 
 
diff --git a/apps/settings.h b/apps/settings.h
index ba2a109..f3f6d84 100644
--- a/apps/settings.h
+++ b/apps/settings.h
@@ -21,6 +21,7 @@
 #define __SETTINGS_H__
 
 #include <stdbool.h>
+#include "file.h"
 
 /* data structures */
 
@@ -49,8 +50,11 @@ struct user_settings
 
     /* resume settings */
 
-    int resume;     /* power-on song resume: 0=no. 1=yes song. 2=yes pl   */
-    int track_time; /* number of seconds into the track to resume         */
+    bool resume;       /* resume option on/off */
+    int resume_index;  /* index in playlist (-1 for no active resume) */
+    int resume_offset; /* byte offset in mp3 file */
+    int resume_seed;   /* random seed for playlist shuffle */
+    unsigned char resume_file[MAX_PATH+1]; /* playlist name (or dir) */
 
     /* misc options */
 
diff --git a/apps/settings_menu.c b/apps/settings_menu.c
index 0de99b0..e66d0f3 100644
--- a/apps/settings_menu.c
+++ b/apps/settings_menu.c
@@ -57,6 +57,11 @@ static void sort_case(void)
     set_bool( "[Sort case sensitive]", &global_settings.sort_case );
 }
 
+static void resume(void)
+{
+    set_bool( "[Resume]", &global_settings.resume );
+}
+
 static void backlight_timer(void)
 {
     char* names[] = { "off", "on ",
@@ -153,13 +158,13 @@ void settings_menu(void)
         { "Time/Date",       timedate_set    },
 #endif
         { "FF/Rewind",       ff_rewind       },
+        { "Resume",          resume          },
     };
     bool old_shuffle = global_settings.playlist_shuffle;
     
     m=menu_init( items, sizeof items / sizeof(struct menu_items) );
     menu_run(m);
     menu_exit(m);
-    settings_save();
 
     if (old_shuffle != global_settings.playlist_shuffle)
     {
diff --git a/apps/tree.c b/apps/tree.c
index d266051..5312885 100644
--- a/apps/tree.c
+++ b/apps/tree.c
@@ -102,12 +102,14 @@ extern unsigned char bitmap_icons_6x8[LastIcon][6];
 #define TREE_EXIT  BUTTON_LEFT
 #define TREE_ENTER BUTTON_RIGHT
 #define TREE_MENU  BUTTON_F1
+#define RELEASE_MASK (BUTTON_OFF)
 #else
 #define TREE_NEXT  BUTTON_RIGHT
 #define TREE_PREV  BUTTON_LEFT
 #define TREE_EXIT  BUTTON_STOP
 #define TREE_ENTER BUTTON_PLAY
 #define TREE_MENU  BUTTON_MENU
+#define RELEASE_MASK (BUTTON_STOP)
 #endif /* HAVE_RECORDER_KEYPAD */
 
 #define TREE_ATTR_M3U 0x80 /* unused by FAT attributes */
@@ -292,6 +294,98 @@ static int showdir(char *path, int start)
     return filesindir;
 }
 
+bool ask_resume(void)
+{
+    lcd_clear_display();
+    lcd_puts(0,0,"Resume?");
+#ifdef HAVE_LCD_CHARCELLS
+    lcd_puts(0,1,"(Play/Stop)");
+#else
+    lcd_puts(0,1,"Play = Yes");
+    lcd_puts(0,2,"Any other = No");
+#endif
+    lcd_update();
+    if (button_get(true) == BUTTON_PLAY)
+        return true;
+    return false;
+}
+
+void start_resume(void)
+{
+    if ( global_settings.resume &&
+         global_settings.resume_index != -1 ) {
+        int len = strlen(global_settings.resume_file);
+
+        DEBUGF("Resume file %s\n",global_settings.resume_file);
+        DEBUGF("Resume index %X offset %X\n",
+               global_settings.resume_index,
+               global_settings.resume_offset);
+        DEBUGF("Resume shuffle %s seed %X\n",
+               global_settings.playlist_shuffle?"on":"off",
+               global_settings.resume_seed);
+
+        /* playlist? */
+        if (!strcasecmp(&global_settings.resume_file[len-4], ".m3u")) {
+            char* slash;
+
+            /* check that the file exists */
+            int fd = open(global_settings.resume_file, O_RDONLY);
+            if(fd<0)
+                return;
+            close(fd);
+
+            if (!ask_resume())
+                return;
+            
+            slash = strrchr(global_settings.resume_file,'/');
+            if (slash) {
+                *slash=0;
+                play_list(global_settings.resume_file,
+                          slash+1,
+                          global_settings.resume_index,
+                          global_settings.resume_offset,
+                          global_settings.resume_seed );
+                *slash='/';
+            }
+            else {
+                /* check that the dir exists */
+                DIR* dir = opendir(global_settings.resume_file);
+                if(!dir)
+                    return;
+                closedir(dir);
+
+                if (!ask_resume())
+                    return;
+
+                play_list("/",
+                          global_settings.resume_file,
+                          global_settings.resume_index,
+                          global_settings.resume_offset,
+                          global_settings.resume_seed );
+            }
+        }
+        else {
+            int start_index;
+
+            if (!ask_resume())
+                return;
+
+            if (showdir(global_settings.resume_file, 0) < 0 )
+                return;
+            start_index = build_playlist(global_settings.resume_index);
+            play_list(global_settings.resume_file,
+                      NULL, 
+                      start_index, 
+                      global_settings.resume_offset,
+                      global_settings.resume_seed);
+        }
+
+        status_set_playmode(STATUS_PLAY);
+        status_draw();
+        wps_show();
+    }
+}
+
 bool dirbrowse(char *root)
 {
     int numentries=0;
@@ -317,6 +411,9 @@ bool dirbrowse(char *root)
     tree_max_on_screen = TREE_MAX_ON_SCREEN;
 #endif
 
+    start_resume();
+    button_set_release(RELEASE_MASK);
+
     memcpy(currdir,root,sizeof(currdir));
     numentries = showdir(root, start);
     if (numentries == -1) 
@@ -350,6 +447,7 @@ bool dirbrowse(char *root)
                     restore = true;
                 }
                 break;
+
 #ifdef HAVE_RECORDER_KEYPAD
             case BUTTON_OFF:
                 mpeg_stop();
@@ -357,7 +455,15 @@ bool dirbrowse(char *root)
                 status_draw();
                 restore = true;
                 break;
+
+            case BUTTON_OFF | BUTTON_REL:
+#else
+            case BUTTON_STOP | BUTTON_REL:
 #endif
+                global_settings.resume_index = -1;
+                settings_save();
+                break;
+                
 
             case TREE_ENTER:
 #ifdef HAVE_RECORDER_KEYPAD
@@ -383,16 +489,34 @@ bool dirbrowse(char *root)
                     dircursor=0;
                     start=0;
                 } else {
+                    int seed = current_tick;
                     lcd_stop_scroll();
                     if(dircache[dircursor+start].attr & TREE_ATTR_M3U )
                     {
+                        if ( global_settings.resume )
+                            snprintf(global_settings.resume_file,
+                                     MAX_PATH, "%s/%s",
+                                     currdir,
+                                     dircache[dircursor+start].name);
                         play_list(currdir,
-                                  dircache[dircursor+start].name, 0);
+                                  dircache[dircursor+start].name, 
+                                  0, 0, seed );
                     }
                     else {
+                        if ( global_settings.resume )
+                            strncpy(global_settings.resume_file,
+                                    currdir, MAX_PATH);
                         start_index = build_playlist(dircursor+start);
-                        play_list(currdir, NULL, start_index);
+                        play_list(currdir, NULL, start_index, 0, seed);
                     }
+
+                    if ( global_settings.resume ) {
+                        global_settings.resume_index = 0;
+                        global_settings.resume_offset = 0;
+                        global_settings.resume_seed = seed;
+                        settings_save();
+                    }
+
                     status_set_playmode(STATUS_PLAY);
                     status_draw();
                     lcd_stop_scroll();
@@ -405,6 +529,7 @@ bool dirbrowse(char *root)
                         dirlevel = 0;
                         dircursor = 0;
                         start = 0;
+                        global_settings.resume_index = -1;
                     }
                 }
                 restore = true;
diff --git a/apps/wps.c b/apps/wps.c
index 240bc96..5b30d2b 100644
--- a/apps/wps.c
+++ b/apps/wps.c
@@ -34,6 +34,7 @@
 #include "powermgmt.h"
 #include "status.h"
 #include "main_menu.h"
+#include "ata.h"
 #ifdef HAVE_LCD_BITMAP
 #include "icons.h"
 #include "widgets.h"
@@ -462,6 +463,13 @@ int wps_show(void)
                 {
                     mpeg_pause();
                     status_set_playmode(STATUS_PAUSE);
+                    if (global_settings.resume) {
+                        status_draw();
+                        settings_save();
+#ifndef HAVE_RTC
+                        ata_flush();
+#endif
+                    }
                 }
                 else
                 {
@@ -577,7 +585,6 @@ int wps_show(void)
                         mpeg_ff_rewind(ff_rewind_count);
                         ff_rewind_count = 0;
                         ff_rewind = false;
-                        status_set_playmode(STATUS_PLAY);
 #ifdef HAVE_LCD_CHARCELLS
                         draw_screen(id3);
 #endif
@@ -589,7 +596,6 @@ int wps_show(void)
 #endif
                     {
                         mpeg_prev();
-                        status_set_playmode(STATUS_PLAY);
                     }
                 }
 #ifdef HAVE_PLAYER_KEYPAD
@@ -612,7 +618,6 @@ int wps_show(void)
                         mpeg_ff_rewind(ff_rewind_count);
                         ff_rewind_count = 0;
                         ff_rewind = false;
-                        status_set_playmode(STATUS_PLAY);
 #ifdef HAVE_LCD_CHARCELLS
                         draw_screen(id3);
 #endif
@@ -624,7 +629,6 @@ int wps_show(void)
 #endif
                     {
                         mpeg_next();
-                        status_set_playmode(STATUS_PLAY);
                     }
                 }
 #ifdef HAVE_PLAYER_KEYPAD
@@ -862,6 +866,16 @@ int wps_show(void)
                 if (mpeg_is_playing() && id3)
                     display_file_time(id3->elapsed, id3->length);
                 
+                /* save resume data */
+                if ( id3 && 
+                     global_settings.resume &&
+                     global_settings.resume_offset != id3->offset ) {
+                    DEBUGF("R%X,%X (%X)\n",global_settings.resume_offset,id3->offset,id3);
+                    global_settings.resume_index = id3->index;
+                    global_settings.resume_offset = id3->offset;
+                    settings_save();
+                }
+
                 status_draw();
                 break;
         }
diff --git a/firmware/drivers/ata.c b/firmware/drivers/ata.c
index 5c8ba2d..620f629 100644
--- a/firmware/drivers/ata.c
+++ b/firmware/drivers/ata.c
@@ -304,6 +304,7 @@ extern void ata_delayed_write(unsigned long sector, void* buf)
 extern void ata_flush(void)
 {
     if ( delayed_write ) {
+        DEBUGF("ata_flush()\n");
         delayed_write = false;
         ata_write_sectors(delayed_sector_num, 1, delayed_sector);
     }
diff --git a/firmware/id3.h b/firmware/id3.h
index 1a5bc74..d76614f 100644
--- a/firmware/id3.h
+++ b/firmware/id3.h
@@ -47,6 +47,10 @@ struct mp3entry {
     /* these following two fields are used for local buffering */
     char id3v2buf[300];
     char id3v1buf[3][32];
+
+    /* resume related */
+    int offset;            /* bytes played */
+    int index;             /* playlist index */
 };
 
 #define VBR_FRAMES_FLAG 0x01
diff --git a/firmware/mpeg.c b/firmware/mpeg.c
index a8442f2..1356219 100644
--- a/firmware/mpeg.c
+++ b/firmware/mpeg.c
@@ -52,7 +52,8 @@
 #define MPEG_SWAP_DATA    101
 #define MPEG_TRACK_CHANGE 102
 
-extern char* playlist_next(int steps);
+extern char* playlist_next(int steps, int* id);
+extern void update_file_pos( int id, int pos );
 
 static char *units[] =
 {
@@ -243,6 +244,7 @@ static void remove_all_tags(void)
 }
 #endif
 
+static bool paused; /* playback is paused */
 #ifdef SIMULATOR
 static bool playing = false;
 static bool play_pending = false;
@@ -502,7 +504,7 @@ static void stop_dma(void)
 
 static void dma_tick(void)
 {
-    if(playing)
+    if(playing && !paused)
     {
         /* Start DMA if it is disabled and the DEMAND pin is high */
         if(!dma_on && (PBDR & 0x4000))
@@ -594,6 +596,7 @@ void DEI3(void)
 
             DTCR3 = last_dma_chunk_size & 0xffff;
             SAR3 = (unsigned int)mp3buf + mp3buf_read;
+            id3tags[tag_read_idx]->id3.offset += last_dma_chunk_size;
         }
         else
         {
@@ -646,10 +649,11 @@ static void add_track_to_tag_list(char *filename)
 /* If next_track is true, opens the next track, if false, opens prev track */
 static int new_file(int steps)
 {
-    char *trackname;
-
     do {
-        trackname = playlist_next( steps );
+        char *trackname;
+        int index;
+
+        trackname = playlist_next( steps, &index );
         if ( !trackname )
             return -1;
         
@@ -666,6 +670,8 @@ static int new_file(int steps)
             lseek(mpeg_file, 
                   id3tags[tag_read_idx]->id3.id3v2len & ~1, 
                   SEEK_SET);
+            id3tags[tag_read_idx]->id3.index = index;
+            id3tags[tag_read_idx]->id3.offset = 0;
         }
     } while ( mpeg_file < 0 );
 
@@ -706,6 +712,7 @@ static void mpeg_thread(void)
     int amount_to_read;
     int amount_to_swap;
     int t1, t2;
+    int start_offset;
 
     play_pending = false;
     playing = false;
@@ -720,7 +727,7 @@ static void mpeg_thread(void)
         switch(ev.id)
         {
             case MPEG_PLAY:
-                DEBUGF("MPEG_PLAY %s\n",ev.data);
+                DEBUGF("MPEG_PLAY\n");
                 /* Stop the current stream */
                 play_pending = false;
                 playing = false;
@@ -732,18 +739,21 @@ static void mpeg_thread(void)
                 if(mpeg_file >= 0)
                     close(mpeg_file);
 
-                mpeg_file = open((char*)ev.data, O_RDONLY);
-                while (mpeg_file < 0) {
-                    DEBUGF("Couldn't open file: %s\n",ev.data);
-                    if ( new_file(1) == -1 )
-                        return;
+                if ( new_file(0) == -1 )
+                    return;
+
+                start_offset = (int)ev.data;
+                if (start_offset) {
+                    lseek(mpeg_file, start_offset, SEEK_SET);
+                    id3tags[tag_read_idx]->id3.offset = start_offset;
                 }
+                else {
+                    /* skip past id3v2 tag (to an even byte) */
+                    lseek(mpeg_file, 
+                          id3tags[tag_read_idx]->id3.id3v2len & ~1, 
+                          SEEK_SET);
 
-                add_track_to_tag_list((char *)ev.data);
-                /* skip past id3v2 tag (to an even byte) */
-                lseek(mpeg_file, 
-                      id3tags[tag_read_idx]->id3.id3v2len & ~1, 
-                      SEEK_SET);
+                }
 
                 /* Make it read more data */
                 filling = true;
@@ -752,6 +762,7 @@ static void mpeg_thread(void)
                 /* Tell the file loading code that we want to start playing
                    as soon as we have some data */
                 play_pending = true;
+                paused = false;
 
                 current_track_counter++;
                 break;
@@ -764,6 +775,7 @@ static void mpeg_thread(void)
             case MPEG_PAUSE:
                 DEBUGF("MPEG_PAUSE\n");
                 /* Stop the current stream */
+                paused = true;
                 playing = false;
                 pause_tick = current_tick;
                 stop_dma();
@@ -775,6 +787,7 @@ static void mpeg_thread(void)
                 playing = true;
                 last_dma_tick += current_tick - pause_tick;
                 pause_tick = 0;
+                paused = false;
                 start_dma();
                 break;
 
@@ -799,7 +812,8 @@ static void mpeg_thread(void)
                         play_pending = true;
                     } else {
                         playing = true;
-                        start_dma();
+                        if (!paused)
+                            start_dma();
                     }
                     
                     track_change();
@@ -931,7 +945,8 @@ static void mpeg_thread(void)
                     playing = true;
                     last_dma_tick = current_tick;
                     init_dma();
-                    start_dma();
+                    if (!paused)
+                        start_dma();
                 }
                 else
                 {
@@ -1016,7 +1031,8 @@ static void mpeg_thread(void)
 			
                         last_dma_tick = current_tick;
                         init_dma();
-                        start_dma();
+                        if (!paused)
+                            start_dma();
 
                         /* Tell ourselves that we need more data */
                         queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
@@ -1188,7 +1204,7 @@ static void setup_sci0(void)
 static struct mp3entry taginfo;
 #endif
 
-struct mp3entry* mpeg_current_track(void)
+struct mp3entry* mpeg_current_track()
 {
 #ifdef SIMULATOR
     return &taginfo;
@@ -1210,13 +1226,17 @@ bool mpeg_has_changed_track(void)
     return false;
 }
 
-void mpeg_play(char* trackname)
+void mpeg_play(int offset)
 {
 #ifdef SIMULATOR
-    mp3info(&taginfo, trackname);
-    playing = true;
+    char* trackname = playlist_next( 0, NULL );
+    if ( trackname ) {
+        mp3info(&taginfo, trackname);
+        playing = true;
+    }
+    (void)offset;
 #else
-    queue_post(&mpeg_queue, MPEG_PLAY, trackname);
+    queue_post(&mpeg_queue, MPEG_PLAY, (void*)offset);
 #endif
 }
 
@@ -1252,7 +1272,7 @@ void mpeg_next(void)
 #ifndef SIMULATOR
     queue_post(&mpeg_queue, MPEG_NEXT, NULL);
 #else
-    char* file = playlist_next(1);
+    char* file = playlist_next(1,NULL);
     mp3info(&taginfo, file);
     current_track_counter++;
     playing = true;
@@ -1264,7 +1284,7 @@ void mpeg_prev(void)
 #ifndef SIMULATOR
     queue_post(&mpeg_queue, MPEG_PREV, NULL);
 #else
-    char* file = playlist_next(-1);
+    char* file = playlist_next(-1,NULL);
     mp3info(&taginfo, file);
     current_track_counter--;
     playing = true;
@@ -1282,7 +1302,7 @@ void mpeg_ff_rewind(int change)
 
 bool mpeg_is_playing(void)
 {
-    return playing || play_pending;
+    return (playing || play_pending) && (!paused) ;
 }
 
 #ifndef SIMULATOR
diff --git a/firmware/mpeg.h b/firmware/mpeg.h
index 4836731..69110b3 100644
--- a/firmware/mpeg.h
+++ b/firmware/mpeg.h
@@ -22,7 +22,7 @@
 #include <stdbool.h>
 
 void mpeg_init(int volume, int bass, int treble, int balance, int loudness, int bass_boost, int avc);
-void mpeg_play(char* trackname);
+void mpeg_play(int offset);
 void mpeg_stop(void);
 void mpeg_pause(void);
 void mpeg_resume(void);
diff --git a/uisimulator/common/stubs.c b/uisimulator/common/stubs.c
index 22623dc..1446b82 100644
--- a/uisimulator/common/stubs.c
+++ b/uisimulator/common/stubs.c
@@ -80,3 +80,7 @@ void ata_delayed_write(unsigned long sector, void* buf)
 {
     ata_write_sectors(sector,1,buf);
 }
+
+void ata_flush(void)
+{
+}