Added caption backlight: Turns on backlight briefly at the start and end of each track.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3585 a1c6a512-1295-4272-9138-f99709370657

apps/lang/english.lang

@@ -1482,3 +1482,8 @@ id: LANG_SCROLL_BAR
 desc: display menu, F3 substitute
 eng: "Scroll Bar"
 new:
+
+id: LANG_CAPTION_BACKLIGHT
+desc: in settings_menu
+eng: "Caption backlight"
+new:

apps/settings.c

@@ -125,6 +125,7 @@ modified unless the header & checksum test fails.
 
 Rest of config block, only saved to disk:
 0xAE  fade on pause/unpause/stop setting (bit 0)
+      caption backlight (bit 1)
 0xB0  peak meter clip hold timeout (bit 0-4), peak meter performance (bit 7)
 0xB1  peak meter release step size, peak_meter_dbfs (bit 7)
 0xB2  peak meter min either in -db or in percent
@@ -376,7 +377,9 @@ int settings_save( void )
         config_block[0x29]=(unsigned char)(global_settings.topruntime >> 8);
     }
     
-    config_block[0xae] = (unsigned char)global_settings.fade_on_stop;
+    config_block[0xae] = (unsigned char)
+        ((global_settings.fade_on_stop & 1) |
+         ((global_settings.caption_backlight & 1) << 1));
     config_block[0xb0] = (unsigned char)global_settings.peak_meter_clip_hold |
         (global_settings.peak_meter_performance ? 0x80 : 0);
     config_block[0xb1] = global_settings.peak_meter_release |
@@ -663,7 +666,8 @@ void settings_load(void)
             global_settings.topruntime =
                 config_block[0x28] | (config_block[0x29] << 8);
 
-        global_settings.fade_on_stop=config_block[0xae];
+        global_settings.fade_on_stop = config_block[0xae] & 1;
+        global_settings.caption_backlight = config_block[0xae] & 2;
 
         global_settings.peak_meter_clip_hold = (config_block[0xb0]) & 0x1f;
         global_settings.peak_meter_performance = 

apps/settings.h

@@ -153,6 +153,7 @@ struct user_settings
     int scroll_step;   /* pixels to advance per update */
 
     bool fade_on_stop; /* fade on pause/unpause/stop */
+    bool caption_backlight; /* turn on backlight at end and start of track */
 };
 
 /* prototypes */

apps/settings_menu.c

@@ -67,6 +67,13 @@ static bool invert_cursor(void)
     return rc;
 }
 
+static bool caption_backlight(void)
+{
+    bool rc = set_bool( str(LANG_CAPTION_BACKLIGHT),
+                        &global_settings.caption_backlight);
+
+    return rc;
+}
 /**
  * Menu to configure the battery display on status bar
  */
@@ -752,6 +759,7 @@ static bool display_settings_menu(void)
         { str(LANG_PM_MENU),         peak_meter_menu },  
         { str(LANG_VOLUME_DISPLAY),  volume_type },
         { str(LANG_BATTERY_DISPLAY), battery_type },
+        { str(LANG_CAPTION_BACKLIGHT), caption_backlight },
 #endif
     };
     

apps/wps-display.c

@@ -42,6 +42,7 @@
 #include "lang.h"
 #include "powermgmt.h"
 #include "sprintf.h"
+#include "backlight.h"
 
 #ifdef HAVE_LCD_BITMAP
 #include "icons.h"
@@ -768,6 +769,21 @@ bool wps_refresh(struct mp3entry* id3, int ffwd_offset, unsigned char refresh_mo
     peak_meter_enabled = enable_pm;
 #endif
 
+#ifndef SIMULATOR
+    if (global_settings.caption_backlight && id3) {
+        /* turn on backlight n seconds before track ends, and turn it off n
+           seconds into the new track. n == backlight_timeout, or 5s */
+        int n = 
+            backlight_timeout_value[global_settings.backlight_timeout] * 1000;
+
+        if ( n < 1000 )
+            n = 5000; /* use 5s if backlight is always on or off */
+ 
+        if ((id3->elapsed < 1000) ||
+            ((id3->length - id3->elapsed) < (unsigned)n))
+            backlight_on();
+    }
+#endif
     return true;
 }
 

firmware/backlight.c

@@ -41,7 +41,7 @@ static bool backlight_on_when_charging = 0;
 static int backlight_timer;
 static int backlight_timeout = 5;
 
-static char timeout_value[19] =
+const char backlight_timeout_value[19] =
 {
     -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 45, 60, 90
 };
@@ -63,7 +63,7 @@ void backlight_thread(void)
                 }
                 else
                 {
-                    backlight_timer = HZ*timeout_value[backlight_timeout];
+                    backlight_timer = HZ*backlight_timeout_value[backlight_timeout];
                 }
 
                 if(backlight_timer < 0)

firmware/export/backlight.h

@@ -27,5 +27,6 @@ int  backlight_get_timeout(void);
 void backlight_set_timeout(int seconds);
 bool backlight_get_on_when_charging(void);
 void backlight_set_on_when_charging(bool yesno);
+extern const char backlight_timeout_value[];
 
 #endif