Patch #868645 by Philipp Pertermann, volume triggered recording for the Archos recording devices

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6243 a1c6a512-1295-4272-9138-f99709370657

3 files changed, 573 insertions, 92 deletions

diff --git a/apps/recorder/peakmeter.c b/apps/recorder/peakmeter.c
index 41d375e076..0481e25acd 100644
--- a/apps/recorder/peakmeter.c
+++ b/apps/recorder/peakmeter.c
@@ -22,6 +22,7 @@
 #include "kernel.h"
 #include "settings.h"
 #include "lcd.h"
+#include "widgets.h"
 #include "wps-display.h"
 #include "sprintf.h"
 #include "button.h"
@@ -67,6 +68,24 @@ static unsigned short db_min = 0;
 static unsigned short db_max = 9000;
 static unsigned short db_range = 9000;
 
+static unsigned short trig_strt_threshold;
+static long trig_strt_duration;
+static long trig_strt_dropout;
+static unsigned short trig_stp_threshold;
+static long trig_stp_hold;
+static long trig_rstrt_gap;
+
+/* point in time when the threshold was exceeded */
+static long trig_hightime;
+
+/* point in time when the volume fell below the threshold*/
+static long trig_lowtime;
+
+/* The output value of the trigger. See TRIG_XXX constants vor valid values */
+static int trig_status = TRIG_OFF;
+
+static void (*trigger_listener)(int) = NULL;
+
 #if CONFIG_HWCODEC == MASNONE
 #define MAS_REG_DQPEAK_L 0
 #define MAS_REG_DQPEAK_R 0
@@ -124,7 +143,7 @@ static const long clip_time_out[] = {
 
 /* precalculated peak values that represent magical
    dBfs values. Used to draw the scale */
-#define DB_SCALE_SRC_VALUES_SIZE 11
+#define DB_SCALE_SRC_VALUES_SIZE 12
 #if 0
 static const int db_scale_src_values[DB_SCALE_SRC_VALUES_SIZE] = {
     32767, /*   0 db */
@@ -138,6 +157,7 @@ static const int db_scale_src_values[DB_SCALE_SRC_VALUES_SIZE] = {
     328,   /* -40 db */
     104,   /* -50 db */
     33,    /* -60 db */
+    1,     /* -inf   */
 };
 #else
 static const int db_scale_src_values[DB_SCALE_SRC_VALUES_SIZE] = {
@@ -152,9 +172,25 @@ static const int db_scale_src_values[DB_SCALE_SRC_VALUES_SIZE] = {
     373,   /* -40 db */
     102,   /* -50 db */
     33,    /* -60 db */
+    0,     /* -inf   */
 };
 #endif
 
+const char* peak_meter_dbnames[DB_SCALE_SRC_VALUES_SIZE] = {
+    "0 db",
+    "-3 db",
+    "-6 db",
+    "-9 db",
+    "-12 db",
+    "-18 db",
+    "-24 db",
+    "-30 db",
+    "-40 db",
+    "-50 db",
+    "-60 db",
+    "-inf",
+};
+
 static int db_scale_count = DB_SCALE_SRC_VALUES_SIZE;
 
 /* if db_scale_valid is false the content of 
@@ -275,8 +311,8 @@ int calc_db (int isample) {
 
 
 /**
- * A helper function for db_to_sample. Don't call it separately but
- * use db_to_sample. If one or both of min and max are outside the 
+ * A helper function for peak_meter_db2sample. Don't call it separately but
+ * use peak_meter_db2sample. If one or both of min and max are outside the
  * range 0 <= min (or max) < 8961 the behaviour of this function is
  * undefined. It may not return.
  * @param int min - The minimum of the value range that is searched.
@@ -312,7 +348,7 @@ static int db_to_sample_bin_search(int min, int max, int db){
  * @return int - The return value is in the range of
  *               0 <= return value < MAX_PEAK
  */
-static int db_to_sample(int db) {
+int peak_meter_db2sample(int db) {
     int retval = 0;
 
     /* what is the maximum pseudo db value */
@@ -351,7 +387,7 @@ static int db_to_sample(int db) {
  */
 void peak_meter_set_min(int newmin) {
     if (peak_meter_use_dbfs) {
-        peak_meter_range_min = db_to_sample(newmin);
+        peak_meter_range_min = peak_meter_db2sample(newmin);
 
     } else {
         if (newmin < peak_meter_range_max) {
@@ -392,7 +428,7 @@ int peak_meter_get_min(void) {
  */
 void peak_meter_set_max(int newmax) {
     if (peak_meter_use_dbfs) {
-        peak_meter_range_max = db_to_sample(newmax);
+        peak_meter_range_max = peak_meter_db2sample(newmax);
     } else {
         if (newmax > peak_meter_range_min) {
             peak_meter_range_max = newmax * MAX_PEAK / 100;
@@ -504,6 +540,15 @@ void peak_meter_playback(bool playback)
 #endif
 }
 
+static void set_trig_status(int new_state) {
+    if (trig_status != new_state) {
+        trig_status = new_state;
+        if (trigger_listener != NULL) {
+            trigger_listener(trig_status);
+        }
+    }
+}
+
 /**
  * Reads peak values from the MAS, and detects clips. The 
  * values are stored in peak_meter_l peak_meter_r for later 
@@ -546,6 +591,121 @@ inline void peak_meter_peek(void)
             current_tick + clip_time_out[peak_meter_clip_hold];
     }
 
+    switch (trig_status) {
+        case TRIG_READY:
+            /* no more changes, if trigger was activated as release trigger */
+            /* threshold exceeded? */
+            if ((left > trig_strt_threshold) || (right > trig_strt_threshold)) {
+                if (trig_strt_duration) {
+                    /* reset trigger duration */
+                    trig_hightime = current_tick;
+
+                    /* reset dropout duration */
+                    trig_lowtime = current_tick;
+
+                    /* if trig_duration is set to 0 the user wants to start
+                     recording immediately */
+                    set_trig_status(TRIG_STEADY);
+                } else {
+                    set_trig_status(TRIG_GO);
+                }
+            }
+            break;
+
+        case TRIG_STEADY:
+        case TRIG_RETRIG:
+            /* trigger duration exceeded */
+            if (current_tick - trig_hightime > trig_strt_duration) {
+                set_trig_status(TRIG_GO);
+            } else {
+                /* threshold exceeded? */
+                if ((left > trig_strt_threshold) ||
+                    (right > trig_strt_threshold)) {
+                    /* reset lowtime */
+                    trig_lowtime = current_tick;
+                }
+                /* volume is below threshold */
+                else {
+                    /* dropout occurred? */
+                    if (current_tick - trig_lowtime > trig_strt_dropout){
+                        if (trig_status == TRIG_STEADY){
+                            set_trig_status(TRIG_READY);
+                        }
+                        /* trig_status == TRIG_RETRIG */
+                        else {
+                            /* the gap has already expired */
+                            trig_lowtime = current_tick - trig_rstrt_gap - 1;
+                            set_trig_status(TRIG_POSTREC);
+                        }
+                    }
+                }
+            }
+            break;
+
+        case TRIG_GO:
+        case TRIG_CONTINUE:
+            /* threshold exceeded? */
+            if ((left > trig_stp_threshold) || (right > trig_stp_threshold)) {
+                /* restart hold time countdown */
+                trig_lowtime = current_tick;
+            } else {
+                set_trig_status(TRIG_POSTREC);
+                trig_hightime = current_tick;
+            }
+            break;
+
+        case TRIG_POSTREC:
+            /* gap time expired? */
+            if (current_tick - trig_lowtime > trig_rstrt_gap){
+                /* start threshold exceeded? */
+                if ((left > trig_strt_threshold) ||
+                    (right > trig_strt_threshold)) {
+
+                    set_trig_status(TRIG_RETRIG);
+                    trig_hightime = current_tick;
+                }
+                else
+
+                /* stop threshold exceeded */
+                if ((left > trig_stp_threshold) ||
+                    (right > trig_stp_threshold)) {
+                    if (current_tick - trig_hightime > trig_stp_hold){
+                        trig_lowtime = current_tick;
+                        set_trig_status(TRIG_CONTINUE);
+                    } else {
+                        trig_lowtime = current_tick - trig_rstrt_gap - 1;
+                    }
+                }
+
+                /* below any threshold */
+                else {
+                    if (current_tick - trig_lowtime > trig_stp_hold){
+                        set_trig_status(TRIG_READY);
+                    } else {
+                        trig_hightime = current_tick;
+                    }
+                }
+            }
+
+            /* still within the gap time */
+            else {
+                /* stop threshold exceeded */
+                if ((left > trig_stp_threshold) ||
+                    (right > trig_stp_threshold)) {
+                    set_trig_status(TRIG_CONTINUE);
+                    trig_lowtime = current_tick;
+                }
+
+                /* hold time expired */
+                else if (current_tick - trig_lowtime > trig_stp_hold){
+                    trig_hightime = current_tick;
+                    trig_lowtime = current_tick;
+                    set_trig_status(TRIG_READY);
+                }
+            }
+            break;
+    }
+
     /* peaks are searched -> we have to find the maximum. When
        many calls of peak_meter_peek the maximum value will be
        stored in peak_meter_x. This maximum is reset by the
@@ -558,37 +718,6 @@ inline void peak_meter_peek(void)
 #endif
 }
 
-
-/**
- * The thread function for the peak meter calls peak_meter_peek 
- * to reas out the mas and find maxima, clips, etc. No display
- * is performed.
- */
-/*
-void peak_meter_thread(void) {
-    sleep(5000);
-    while (1) {
-        if (peak_meter_enabled && peak_meter_use_thread){
-            peak_meter_peek();
-        }
-        yield();
-    }
-}
-*/
-
-/**
- * Creates the peak meter thread 
- */
-/*
-void peak_meter_init(void) {
-    create_thread(
-        peak_meter_thread, 
-        peak_meter_stack, 
-        sizeof peak_meter_stack, 
-        "peakmeter");
-}
-*/
-
 /**
  * Reads out the peak volume of the left channel.
  * @return int - The maximum value that has been detected
@@ -842,6 +971,22 @@ void peak_meter_draw(int x, int y, int width, int height) {
         lcd_invertpixel(db_scale_lcd_coord[i], y + height / 2 - 1);
     }
 
+    if (trig_status != TRIG_OFF) {
+        int start_trigx, stop_trigx, ycenter;
+
+        ycenter = y + height / 2;
+        /* display threshold value */
+        start_trigx = x+peak_meter_scale_value(trig_strt_threshold,meterwidth);
+        lcd_drawline(start_trigx, ycenter - 2, start_trigx, ycenter);
+        start_trigx ++;
+        if (start_trigx < LCD_WIDTH) lcd_drawpixel(start_trigx, ycenter - 1);
+
+        stop_trigx = x + peak_meter_scale_value(trig_stp_threshold,meterwidth);
+        lcd_drawline(stop_trigx, ycenter - 2, stop_trigx, ycenter);
+        if (stop_trigx > 0) lcd_drawpixel(stop_trigx - 1, ycenter - 1);
+
+    }
+
 #ifdef PM_DEBUG
     /* display a bar to show how many calls to peak_meter_peek 
        have ocurred since the last display */
@@ -866,6 +1011,161 @@ void peak_meter_draw(int x, int y, int width, int height) {
     last_right = right;
 }
 
+/**
+ * Defines the parameters of the trigger. After these parameters are defined
+ * the trigger can be started either by peak_meter_attack_trigger or by
+ * peak_meter_release_trigger. Note that you can pass either linear (%) or
+ * logarithmic (db) values to the thresholds. Positive values are intepreted as
+ * percent (0 is 0% .. 100 is 100%). Negative values are interpreted as db.
+ * To avoid ambiguosity of the value 0 the negative values are shifted by -1.
+ * Thus -75 is -74db .. -1 is 0db.
+ * @param start_threshold - The threshold used for attack trigger. Negative
+ *                          values are interpreted as db -1, positive as %.
+ * @param start_duration - The minimum time span within which start_threshold
+ *                         must be exceeded to fire the attack trigger.
+ * @param start_dropout - The maximum time span the level may fall below
+ *                        start_threshold without releasing the attack trigger.
+ * @param stop_threshold - The threshold the volume must fall below to release
+ *                         the release trigger.Negative values are
+ *                         interpreted as db -1, positive as %.
+ * @param stop_hold - The minimum time the volume must fall below the
+ *                    stop_threshold to release the trigger.
+ * @param
+ */
+void peak_meter_define_trigger(
+    int start_threshold,
+    long start_duration,
+    long start_dropout,
+    int stop_threshold,
+    long stop_hold_time,
+    long restart_gap
+    )
+{
+    if (start_threshold < 0) {
+        /* db */
+        if (start_threshold < -89) {
+            trig_strt_threshold = 0;
+        } else {
+            trig_strt_threshold =peak_meter_db2sample((start_threshold+1)*100);
+        }
+    } else {
+        /* linear percent */
+        trig_strt_threshold = start_threshold * MAX_PEAK / 100;
+    }
+    trig_strt_duration = start_duration;
+    trig_strt_dropout = start_dropout;
+    if (stop_threshold < 0) {
+        /* db */
+        trig_stp_threshold = peak_meter_db2sample((stop_threshold + 1) * 100);
+    } else {
+        /* linear percent */
+        trig_stp_threshold = stop_threshold * MAX_PEAK / 100;
+    }
+    trig_stp_hold = stop_hold_time;
+    trig_rstrt_gap = restart_gap;
+}
+
+/**
+ * Enables or disables the trigger.
+ * @param on - If true the trigger is turned on.
+ */
+void peak_meter_trigger(bool on) {
+    /* don't use set_trigger here as that would fire an undesired event */
+    trig_status = on ? TRIG_READY : TRIG_OFF;
+}
+
+/**
+ * Registers the listener function that listenes on trig_status changes.
+ * @param listener - The function that is called with each change of
+ *                   trig_status. May be set to NULL if no callback is desired.
+ */
+void peak_meter_set_trigger_listener(void (*listener)(int status)) {
+    trigger_listener = listener;
+}
+
+/**
+ * Fetches the status of the trigger.
+ * TRIG_OFF: the trigger is inactive
+ * TRIG_RELEASED:  The volume level is below the threshold
+ * TRIG_ACTIVATED: The volume level has exceeded the threshold, but the trigger
+ *                 hasn't been fired yet.
+ * TRIG_FIRED:     The volume exceeds the threshold
+ *
+ * To activate the trigger call either peak_meter_attack_trigger or
+ * peak_meter_release_trigger. To turn the trigger off call
+ * peak_meter_trigger_off.
+ */
+int peak_meter_trigger_status(void) {
+   return trig_status; /* & TRIG_PIT_MASK;*/
+}
+
+void peak_meter_draw_trig(int xpos, int ypos) {
+    int x = xpos + ICON_PLAY_STATE_WIDTH + 1;
+    switch (trig_status) {
+        long time_left;
+
+        case TRIG_READY:
+            scrollbar(x, ypos + 1, TRIGBAR_WIDTH, TRIG_HEIGHT - 2,
+                      TRIGBAR_WIDTH, 0, 0, HORIZONTAL);
+            lcd_bitmap(bitmap_icons_7x8[Icon_Stop], xpos, ypos,
+                       ICON_PLAY_STATE_WIDTH, STATUSBAR_HEIGHT, false);
+            break;
+
+        case TRIG_STEADY:
+        case TRIG_RETRIG:
+            time_left = trig_strt_duration - (current_tick - trig_hightime);
+            time_left = time_left * TRIGBAR_WIDTH / trig_strt_duration;
+            scrollbar(x, ypos + 1, TRIGBAR_WIDTH, TRIG_HEIGHT - 2,
+                      TRIGBAR_WIDTH, 0, TRIGBAR_WIDTH - time_left, HORIZONTAL);
+            lcd_bitmap(bitmap_icons_7x8[Icon_Stop], xpos, ypos,
+                       ICON_PLAY_STATE_WIDTH, STATUSBAR_HEIGHT, false);
+            break;
+
+        case TRIG_GO:
+        case TRIG_CONTINUE:
+            scrollbar(x, ypos + 1, TRIGBAR_WIDTH, TRIG_HEIGHT - 2,
+                      TRIGBAR_WIDTH, TRIGBAR_WIDTH, TRIGBAR_WIDTH, HORIZONTAL);
+            lcd_bitmap(bitmap_icons_7x8[Icon_Record],
+                       TRIG_WIDTH - ICON_PLAY_STATE_WIDTH, ypos,
+                       ICON_PLAY_STATE_WIDTH, STATUSBAR_HEIGHT, false);
+            break;
+
+        case TRIG_POSTREC:
+            time_left = trig_stp_hold - (current_tick - trig_lowtime);
+            time_left = time_left * TRIGBAR_WIDTH / trig_stp_hold;
+            scrollbar(x, ypos + 1, TRIGBAR_WIDTH, TRIG_HEIGHT - 2,
+                      TRIGBAR_WIDTH, time_left, TRIGBAR_WIDTH, HORIZONTAL);
+            lcd_bitmap(bitmap_icons_7x8[Icon_Record],
+                       TRIG_WIDTH - ICON_PLAY_STATE_WIDTH, ypos,
+                       ICON_PLAY_STATE_WIDTH, STATUSBAR_HEIGHT, false);
+            break;
+    }
+
+}
+
+int peak_meter_draw_get_btn(int x, int y, int width, int height)
+{
+    int button;
+    long next_refresh = current_tick;
+    long next_big_refresh = current_tick + HZ / 10;
+    button = BUTTON_NONE;
+    while (!TIME_AFTER(current_tick, next_big_refresh)) {
+        button = button_get(false);
+        if (button != BUTTON_NONE) {
+            break;
+        }
+        peak_meter_peek();
+        yield();
+
+        if (TIME_AFTER(current_tick, next_refresh)) {
+            peak_meter_draw(x, y, width, height);
+            lcd_update_rect(x, y, width, height);
+            next_refresh = current_tick + HZ / peak_meter_fps;
+        }
+    }
+    return button;
+}
+
 #ifdef PM_DEBUG
 static void peak_meter_clear_histogram(void) {
     int i = 0;
diff --git a/apps/recorder/peakmeter.h b/apps/recorder/peakmeter.h
index db419a0afa..3c0a28bf3b 100644
--- a/apps/recorder/peakmeter.h
+++ b/apps/recorder/peakmeter.h
@@ -24,12 +24,12 @@
 extern bool peak_meter_histogram(void);
 #endif
 
-
 extern bool peak_meter_enabled;
 extern int  peak_meter_fps;
 
 extern void peak_meter_playback(bool playback);
 extern void peak_meter_draw(int x, int y, int width, int height);
+extern int  peak_meter_draw_get_btn(int x, int y, int width, int height);
 extern void peak_meter_set_clip_hold(int time);
 extern void peak_meter_peek(void);
 extern void peak_meter_init_range( bool dbfs, int range_min, int range_max);
@@ -42,8 +42,40 @@ extern int  peak_meter_get_max(void);
 extern void peak_meter_set_use_dbfs(int use);
 extern int  peak_meter_get_use_dbfs(void);
 extern int  calc_db (int isample);
+extern int  peak_meter_db2sample(int db);
 extern unsigned short peak_meter_scale_value(unsigned short val, int meterwidth);
 
+/* valid values for trigger_status */
+#define TRIG_OFF            0x00
+#define TRIG_READY          0x01
+#define TRIG_STEADY         0x02
+#define TRIG_GO             0x03
+#define TRIG_POSTREC        0x04
+#define TRIG_RETRIG         0x05
+#define TRIG_CONTINUE       0x06
+
+extern void peak_meter_define_trigger(
+    int start_threshold,
+    long start_duration,
+    long start_dropout,
+    int stop_threshold,
+    long stop_hold_time,
+    long restart_gap
+    );
+
+extern void peak_meter_trigger(bool on);
+extern int peak_meter_trigger_status(void);
+extern void peak_meter_set_trigger_listener(void (*listener)(int status));
+
+//#define TRIG_WIDTH 12
+//#define TRIG_HEIGHT 14
+
+#define TRIG_WIDTH 112
+#define TRIG_HEIGHT 8
+#define TRIGBAR_WIDTH (TRIG_WIDTH - (2 * (ICON_PLAY_STATE_WIDTH + 1)))
+
+extern void peak_meter_draw_trig(int x, int y);
+
 extern unsigned short peak_meter_range_min;
 extern unsigned short peak_meter_range_max;
 
diff --git a/apps/recorder/recording.c b/apps/recorder/recording.c
index 7aa6aba98c..39e94739b5 100644
--- a/apps/recorder/recording.c
+++ b/apps/recorder/recording.c
@@ -50,6 +50,7 @@
 #include "talk.h"
 #include "atoi.h"
 #include "sound.h"
+#include "ata.h"
 
 #ifdef HAVE_RECORDING
 
@@ -240,6 +241,56 @@ int rec_create_directory(void)
     return 0;
 }
 
+static char path_buffer[MAX_PATH];
+
+/* used in trigger_listerner and recording_screen */
+static unsigned int last_seconds = 0;
+
+/**
+ * Callback function so that the peak meter code can send an event
+ * to this application. This function can be passed to
+ * peak_meter_set_trigger_listener in order to activate the trigger.
+ */
+static void trigger_listener(int trigger_status)
+{
+    switch (trigger_status)
+    {
+        case TRIG_GO:
+            if((mpeg_status() & MPEG_STATUS_RECORD) != MPEG_STATUS_RECORD)
+            {
+              talk_buffer_steal(); /* we use the mp3 buffer */
+              mpeg_record(rec_create_filename(path_buffer));
+
+              /* give control to mpeg thread so that it can start recording */
+              yield(); yield(); yield();
+            }
+
+            /* if we're already recording this is a retrigger */
+            else
+            {
+                mpeg_new_file(rec_create_filename(path_buffer));
+                /* tell recording_screen to reset the time */
+                last_seconds = 0;
+            }
+            break;
+
+        /* A _change_ to TRIG_READY means the current recording has stopped */
+        case TRIG_READY:
+            if(mpeg_status() & MPEG_STATUS_RECORD)
+            {
+                mpeg_stop();
+                if (global_settings.rec_trigger_mode != TRIG_MODE_REARM)
+                {
+                    peak_meter_set_trigger_listener(NULL);
+                    peak_meter_trigger(false);
+                }
+            }
+            break;
+    }
+}
+
+#define BLINK_MASK 0x10
+
 bool recording_screen(void)
 {
     long button;
@@ -252,12 +303,11 @@ bool recording_screen(void)
     int update_countdown = 1;
     bool have_recorded = false;
     unsigned int seconds;
-    unsigned int last_seconds = 0;
     int hours, minutes;
     char path_buffer[MAX_PATH];
     bool been_in_usb_mode = false;
-    bool led_state;
-    int led_delay;
+    int last_mpeg_stat = -1;
+    bool last_led_stat = false;
 
     const unsigned char *byte_units[] = {
         ID2P(LANG_BYTE),
@@ -267,6 +317,9 @@ bool recording_screen(void)
     };
 
     cursor = 0;
+#ifndef SIMULATOR
+    ata_set_led_enabled(false);
+#endif
     mpeg_init_recording();
 
     sound_set(SOUND_VOLUME, global_settings.volume);
@@ -288,6 +341,8 @@ bool recording_screen(void)
 
     set_gain();
 
+    settings_apply_trigger();
+
     lcd_setfont(FONT_SYSFIXED);
     lcd_getstringsize("M", &w, &h);
     lcd_setmargins(global_settings.invert_cursor ? 0 : w, 8);
@@ -295,45 +350,93 @@ bool recording_screen(void)
     if(rec_create_directory() > 0)
         have_recorded = true;
 
-    led_state = false;
-    led_delay = 0;
-    
     while(!done)
     {
+        int mpeg_stat = mpeg_status();
+
         /*
          * Flash the LED while waiting to record.  Turn it on while
          * recording.
          */
-        if(mpeg_status() != MPEG_STATUS_RECORD)
+        if(mpeg_stat & MPEG_STATUS_RECORD)
         {
-            if(led_delay++ >= 4)
+            if (mpeg_stat & MPEG_STATUS_PAUSE)
+            {
+                /*
+                This is supposed to be the same as
+                  led(current_tick & BLINK_MASK)
+                But we do this hubub to prevent unnecessary hardware
+                communication when the led already has the desired state.
+                */
+                if (last_led_stat != ((current_tick & BLINK_MASK) == BLINK_MASK))
+                {
+                    /* trigger is on in status TRIG_READY (no check needed) */
+                    last_led_stat = !last_led_stat;
+                    led(last_led_stat);
+                }
+            }
+            else
             {
-                led_state = !led_state;
-                invert_led(led_state);
-                led_delay = 0;
+                /* trigger is on in status TRIG_READY (no check needed) */
+                led(true);
             }
         }
         else
         {
-            if(!led_state)
+            int trigStat = peak_meter_trigger_status();
+
+            // other trigger stati than trig_off and trig_steady
+            // already imply that we are recording.
+            if (trigStat == TRIG_STEADY)
             {
-                led_state = true;
-                invert_led(true);
+                /* This is supposed to be the same as
+                   led(current_tick & BLINK_MASK)
+                   But we do this hubub to prevent unnecessary hardware
+                   communication when the led already has the desired state.
+                */
+                if (last_led_stat != ((current_tick & BLINK_MASK) == BLINK_MASK))
+                {
+                    /* trigger is on in status TRIG_READY (no check needed) */
+                    last_led_stat = !last_led_stat;
+                    led(last_led_stat);
+                }
+            }
+            else
+            {
+                /* trigger is on in status TRIG_READY (no check needed) */
+                led(false);
             }
         }
 
-        button = button_get_w_tmo(HZ / peak_meter_fps);
+        /* Wait for a button while drawing the peak meter */
+        button = peak_meter_draw_get_btn(0, 8 + h*2, LCD_WIDTH, h);
+
+        if (last_mpeg_stat != mpeg_stat)
+        {
+            if (mpeg_stat == MPEG_STATUS_RECORD)
+            {
+                have_recorded = true;
+            }
+            last_mpeg_stat = mpeg_stat;
+        }
+
         switch(button)
         {
             case REC_STOPEXIT:
-                if(mpeg_status() & MPEG_STATUS_RECORD)
+                if(mpeg_stat & MPEG_STATUS_RECORD)
                 {
+                    /* turn off the trigger */
+                    peak_meter_trigger(false);
+                    peak_meter_set_trigger_listener(NULL);
                     mpeg_stop();
                 }
                 else
                 {
                     peak_meter_playback(true);
                     peak_meter_enabled = false;
+                    /* turn off the trigger */
+                    peak_meter_set_trigger_listener(NULL);
+                    peak_meter_trigger(false);
                     done = true;
                 }
                 update_countdown = 1; /* Update immediately */
@@ -341,8 +444,13 @@ bool recording_screen(void)
 
             case REC_RECPAUSE:
                 /* Only act if the mpeg is stopped */
-                if(!(mpeg_status() & MPEG_STATUS_RECORD))
+                if(!(mpeg_stat & MPEG_STATUS_RECORD))
+                {
+                    /* is this manual or triggered recording? */
+                    if ((global_settings.rec_trigger_mode == TRIG_MODE_OFF) ||
+                        (peak_meter_trigger_status() != TRIG_OFF))
                 {
+                        /* manual recording */
                     have_recorded = true;
                     talk_buffer_steal(); /* we use the mp3 buffer */
                     mpeg_record(rec_create_filename(path_buffer));
@@ -353,9 +461,22 @@ bool recording_screen(void)
                         mpeg_beep(HZ/2); /* longer beep on start */
                     }
                 }
+
+                    /* this is triggered recording */
+                else
+                {
+                        update_countdown = 1; /* Update immediately */
+
+                        /* we don't start recording now, but enable the
+                           trigger and let the callback function
+                           trigger_listener control when the recording starts */
+                        peak_meter_trigger(true);
+                        peak_meter_set_trigger_listener(&trigger_listener);
+                    }
+                }
                 else
                 {
-                    if(mpeg_status() & MPEG_STATUS_PAUSE)
+                    if(mpeg_stat & MPEG_STATUS_PAUSE)
                     {
                         mpeg_resume_recording();
                         if (global_settings.talk_menu)
@@ -473,11 +594,14 @@ bool recording_screen(void)
                 
 #ifdef REC_SETTINGS
             case REC_SETTINGS:
-                if(mpeg_status() != MPEG_STATUS_RECORD)
+                if(mpeg_stat != MPEG_STATUS_RECORD)
                 {
-                    invert_led(false);
+                    /* led is restored at begin of loop / end of function */
+                    led(false);
                     if (recording_menu(false))
+                    {
                         return SYS_USB_CONNECTED;
+                    }
                     settings_save();
 
                     if (global_settings.rec_prerecord_time)
@@ -491,7 +615,6 @@ bool recording_screen(void)
                                                global_settings.rec_prerecord_time);
                 
                     set_gain();
-
                     update_countdown = 1; /* Update immediately */
 
                     lcd_setfont(FONT_SYSFIXED);
@@ -502,9 +625,10 @@ bool recording_screen(void)
 
 #ifdef REC_F2
             case REC_F2:
-                if(mpeg_status() != MPEG_STATUS_RECORD)
+                if(mpeg_stat != MPEG_STATUS_RECORD)
                 {
-                    invert_led(false);
+                    /* led is restored at begin of loop / end of function */
+                    led(false);
                     if (f2_rec_screen())
                     {
                         have_recorded = true;
@@ -518,16 +642,17 @@ bool recording_screen(void)
 
 #ifdef REC_F3
             case REC_F3:
-                if(mpeg_status() & MPEG_STATUS_RECORD)
+                if(mpeg_stat & MPEG_STATUS_RECORD)
                 {
                     mpeg_new_file(rec_create_filename(path_buffer));
                     last_seconds = 0;
                 }
                 else
                 {
-                    if(mpeg_status() != MPEG_STATUS_RECORD)
+                    if(mpeg_stat != MPEG_STATUS_RECORD)
                     {
-                        invert_led(false);
+                        /* led is restored at begin of loop / end of function */
+                        led(false);
                         if (f3_rec_screen())
                         {
                             have_recorded = true;
@@ -542,7 +667,7 @@ bool recording_screen(void)
 
             case SYS_USB_CONNECTED:
                 /* Only accept USB connection when not recording */
-                if(mpeg_status() != MPEG_STATUS_RECORD)
+                if(mpeg_stat != MPEG_STATUS_RECORD)
                 {
                     default_event_handler(SYS_USB_CONNECTED);
                     done = true;
@@ -555,8 +680,6 @@ bool recording_screen(void)
                 break;
         }
 
-        peak_meter_peek();
-        
         if(TIME_AFTER(current_tick, timeout))
         {
             lcd_setfont(FONT_SYSFIXED);
@@ -585,7 +708,7 @@ bool recording_screen(void)
 
                 dseconds = rec_timesplit_seconds(); 
 
-                if(mpeg_status() & MPEG_STATUS_PRERECORD)
+                if(mpeg_stat & MPEG_STATUS_PRERECORD)
                 {
                     snprintf(buf, 32, "%s...", str(LANG_RECORD_PRERECORD));
                 }
@@ -618,15 +741,13 @@ bool recording_screen(void)
                 /* We will do file splitting regardless, since the OFF
                    setting really means 24 hours. This is to make sure
                    that the recorded files don't get too big. */
-                if (mpeg_status() && (seconds >= dseconds))
+                if (mpeg_stat && (seconds >= dseconds))
                 {
                     mpeg_new_file(rec_create_filename(path_buffer));
                     update_countdown = 1;
                     last_seconds = 0;
                 }
 
-                peak_meter_draw(0, 8 + h*2, LCD_WIDTH, h);
-
                 /* Show mic gain if input source is Mic */
                 if(global_settings.rec_source == 0)
                 {
@@ -635,9 +756,9 @@ bool recording_screen(void)
                                       global_settings.rec_mic_gain,
                                       buf2, sizeof(buf2)));
                     if (global_settings.invert_cursor && (pos++ == cursor))
-                        lcd_puts_style(0, 3, buf, STYLE_INVERT);
+                        lcd_puts_style(0, 4, buf, STYLE_INVERT);
                     else
-                        lcd_puts(0, 3, buf);
+                        lcd_puts(0, 4, buf);
                 }
                 else
                 {
@@ -650,53 +771,58 @@ bool recording_screen(void)
                                  fmt_gain(SOUND_LEFT_GAIN, gain,
                                           buf2, sizeof(buf2)));
                         if (global_settings.invert_cursor && (pos++ == cursor))
-                            lcd_puts_style(0, 3, buf, STYLE_INVERT);
+                            lcd_puts_style(0, 4, buf, STYLE_INVERT);
                         else
-                            lcd_puts(0, 3, buf);
+                            lcd_puts(0, 4, buf);
                         
                         snprintf(buf, 32, "%s: %s", str(LANG_RECORDING_LEFT),
                                  fmt_gain(SOUND_LEFT_GAIN,
                                           global_settings.rec_left_gain,
                                           buf2, sizeof(buf2)));
                         if (global_settings.invert_cursor && (pos++ == cursor))
-                            lcd_puts_style(0, 4, buf, STYLE_INVERT);
+                            lcd_puts_style(0, 5, buf, STYLE_INVERT);
                         else
-                            lcd_puts(0, 4, buf);
+                            lcd_puts(0, 5, buf);
                         
                         snprintf(buf, 32, "%s: %s", str(LANG_RECORDING_RIGHT),
                                  fmt_gain(SOUND_RIGHT_GAIN,
                                           global_settings.rec_right_gain,
                                           buf2, sizeof(buf2)));
                         if (global_settings.invert_cursor && (pos++ == cursor))
-                            lcd_puts_style(0, 5, buf, STYLE_INVERT);
+                            lcd_puts_style(0, 6, buf, STYLE_INVERT);
                         else
-                            lcd_puts(0, 5, buf);
+                            lcd_puts(0, 6, buf);
                     }
                 }
 
                 if(global_settings.rec_source != SOURCE_SPDIF)
-                    put_cursorxy(0, 3 + cursor, true);
-
-                snprintf(buf, 32, "%s %s [%d]",
-                         freq_str[global_settings.rec_frequency],
-                         global_settings.rec_channels?
-                         str(LANG_CHANNEL_MONO):str(LANG_CHANNEL_STEREO),
-                         global_settings.rec_quality);
-                lcd_puts(0, 6, buf);
+                    put_cursorxy(0, 4 + cursor, true);
+
+                if (global_settings.rec_source != SOURCE_LINE) {
+                    snprintf(buf, 32, "%s %s [%d]",
+                             freq_str[global_settings.rec_frequency],
+                             global_settings.rec_channels?
+                             str(LANG_CHANNEL_MONO):str(LANG_CHANNEL_STEREO),
+                             global_settings.rec_quality);
+                    lcd_puts(0, 6, buf);
+                }
 
                 status_draw(true);
+                peak_meter_draw(0, 8 + h*2, LCD_WIDTH, h);
 
                 lcd_update();
             }
-            else
+
+            /* draw the trigger status */
+            if (peak_meter_trigger_status() != TRIG_OFF)
             {
-                lcd_clearrect(0, 8 + h*2, LCD_WIDTH, h);
-                peak_meter_draw(0, 8 + h*2, LCD_WIDTH, h);
-                lcd_update_rect(0, 8 + h*2, LCD_WIDTH, h);
+                peak_meter_draw_trig(LCD_WIDTH - TRIG_WIDTH, 4 * h);
+                lcd_update_rect(LCD_WIDTH - (TRIG_WIDTH + 2), 4 * h,
+                                TRIG_WIDTH + 2, TRIG_HEIGHT);
             }
         }
 
-        if(mpeg_status() & MPEG_STATUS_ERROR)
+        if(mpeg_stat & MPEG_STATUS_ERROR)
         {
             done = true;
         }
@@ -721,6 +847,10 @@ bool recording_screen(void)
     
     mpeg_init_playback();
 
+    /* make sure the trigger is really turned off */
+    peak_meter_trigger(false);
+    peak_meter_set_trigger_listener(NULL);
+
     sound_settings_apply();
 
     lcd_setfont(FONT_UI);
@@ -728,6 +858,9 @@ bool recording_screen(void)
     if (have_recorded)
         reload_directory();
 
+#ifndef SIMULATOR
+    ata_set_led_enabled(true);
+#endif
     return been_in_usb_mode;
 /*
 #endif
@@ -883,10 +1016,26 @@ bool f3_rec_screen(void)
         lcd_bitmap(bitmap_icons_7x8[Icon_FastBackward], 
                    LCD_WIDTH/2 - 16, LCD_HEIGHT/2 - 4, 7, 8, true);
 
+        /* trigger setup */
+        ptr = str(LANG_RECORD_TRIGGER);
+        lcd_getstringsize(ptr,&w,&h);
+        lcd_putsxy((LCD_WIDTH-w)/2, LCD_HEIGHT - h*2, ptr);
+        lcd_bitmap(bitmap_icons_7x8[Icon_DownArrow],
+                   LCD_WIDTH/2 - 3, LCD_HEIGHT - h*3, 7, 8, true);
+
         lcd_update();
 
         button = button_get(true);
         switch (button) {
+            case BUTTON_DOWN:
+            case BUTTON_F3 | BUTTON_DOWN:
+#ifndef SIMULATOR
+                rectrigger();
+                settings_apply_trigger();
+#endif
+                exit = true;
+                break;
+
             case BUTTON_LEFT:
             case BUTTON_F3 | BUTTON_LEFT:
                 global_settings.rec_source++;