Change the way patterns are triggered in sequence mode.

Now patterns should be triggered properly even if we come in in the
middle of a phrase, as happens when randomly relocating the transport.

TODO.mu

@@ -5,7 +5,6 @@
 
 ; General
 
-* TODO: {3} fix transport seeking to the middle of a phrase/pattern in Sequence Mode.
 * TODO: {3} deal with dropped ticks from timebase master better when running as slave.
 * TODO: {2} move keybindings into menus for discoverability (like in Non-DAW)
 * TODO: {2} improve or get rid of the transport.valid test at initialization time.

src/jack.C

@@ -202,6 +202,48 @@ midi_all_sound_off ( void )
         }
 }
 
+static void
+stop_all_patterns ( void )
+{
+    for ( uint i = pattern::patterns(); i--; )
+    {
+        pattern *p = pattern::pattern_by_number( i + 1 );
+
+        p->stop();
+    }
+}
+
+static int
+sync ( jack_transport_state_t state, jack_position_t *pos, void * )
+{
+    static bool seeking = false;
+
+    switch ( state )
+    {
+        case JackTransportStopped:           /* new position requested */
+            /* JACK docs lie. This is only called when the transport
+               is *really* stopped, not when starting a slow-sync
+               cycle */
+            stop_all_patterns();
+            return 1;
+        case JackTransportStarting:          /* this means JACK is polling slow-sync clients */
+        {
+            stop_all_patterns();
+            return 1;
+        }
+        case JackTransportRolling:           /* JACK's timeout has expired */
+            /* FIXME: what's the right thing to do here? */
+//            request_locate( pos->frame );
+            return 1;
+            break;
+        default:
+            WARNING( "unknown transport state" );
+    }
+
+    return 0;
+}
+
+
 static int
 process ( jack_nframes_t nframes, void *arg )
 {
@@ -246,29 +288,12 @@ process ( jack_nframes_t nframes, void *arg )
     {
         case PATTERN:
         case TRIGGER:
-        {
-            // stop all patterns.
-            for ( uint i = pattern::patterns(); i--; )
-            {
-                pattern *p = pattern::pattern_by_number( i + 1 );
-
-                p->stop();
-            }
-
+            stop_all_patterns();
             break;
-        }
     }
     switch ( song.play_mode )
     {
         case SEQUENCE:
-            // first handle patterns already playing
-            for ( uint i = pattern::patterns(); i--; )
-            {
-                pattern *p = pattern::pattern_by_number( i + 1 );
-                if ( p && p->playing() )
-                    p->play( ph, nph );
-            }
-
             playlist->play( ph, nph );
             break;
         case PATTERN:
@@ -435,7 +460,7 @@ midi_init ( void )
 
 //1    jack_set_buffer_size_callback( client, bufsize, 0 );
     jack_set_process_callback( client, process, 0 );
-
+    jack_set_sync_callback( client, sync, 0 );
 
 /*     /\* initialize buffer size *\/ */
 /*     transport_poll(); */

src/pattern.C

@@ -300,8 +300,7 @@ pattern::draw_row_names ( Canvas *c ) const
 void
 pattern::trigger ( tick_t start, tick_t end )
 {
-    if ( start > end )
-        ASSERTION( "programming error: invalid loop trigger! (%lu-%lu)", start, end );
+    ASSERT( start <= end, "programming error: invalid loop trigger! (%lu-%lu)", start, end );
 
     _start = start;
     _end   = end;
@@ -402,8 +401,6 @@ pattern::play ( tick_t start, tick_t end ) const
     if ( end > _end )
         end = _end;
 
-    _playing = true;
-
     // where we are in the absolute time
     tick_t tick = start - _start;
     int num_played = tick / d->length;
@@ -415,13 +412,15 @@ pattern::play ( tick_t start, tick_t end ) const
 
     if ( _index < end - start )
     {
-        DMESSAGE( "Triggered pattern %d at tick %lu (ls: %lu, le: %lu, o: %lu)", number(), start, _start, _end, offset  );
+        DMESSAGE( "%s pattern %d at tick %lu (ls: %lu, le: %lu, o: %lu)", _playing ? "Looped" : "Triggered", number(), start, _start, _end, offset  );
 
         _cleared = false;
     }
 
+    _playing = true;
+
     if ( mode() == MUTE )
-        return;
+        goto done;
 
 try_again:
 
@@ -475,7 +474,15 @@ try_again:
 
     DMESSAGE( "out of events, resetting to satisfy loop" );
 
-done: ;
+done:
+
+    if ( _end == end )
+    {
+        /* we're doing playing this trigger */
+        DMESSAGE( "Pattern %d ended at tick %lu (ls: %lu, le: %lu, o: %lu)", number(), end, _start, _end, offset  );
+
+        stop();
+    }
 
 }
 

src/phrase.C

@@ -186,7 +186,6 @@ phrase::play ( tick_t start, tick_t end )
             // not ready yet
             return;
 
-
     if ( start < _start )
         start = _start;
 
@@ -203,7 +202,7 @@ phrase::play ( tick_t start, tick_t end )
     _index = tick % d->length;
 
     if ( _index < end - start )
-        MESSAGE( "Triggered phrase %d at tick %lu (ls: %lu, le: %lu, o: %lu)", number(), start, _start, _end, offset  );
+        DMESSAGE( "Triggered phrase %d at tick %lu (ls: %lu, le: %lu, o: %lu)", number(), start, _start, _end, offset  );
 
 try_again:
 
@@ -215,36 +214,27 @@ try_again:
     {
         //    MESSAGE( "s[%ld] -> t[%ld] : %ld, len %ld", start, end, e->timestamp(), _length ); // (*e).print();
 
-        tick_t ts = e->timestamp() + offset;
+        const tick_t ts = e->timestamp() + offset;
 
         if ( ts >= end )
             goto done;
 
-        if ( ts >= start )
+        if ( e->is_note_on() )
         {
-            event ne = *e;
-            if ( ne.is_note_on() || ne.is_note_off() )
+            const tick_t tse = offset + e->link()->timestamp();
+
+            if ( tse > start )
             {
-                int ev_note = e->note();
-
-//                d->mapping.translate( &ne );
-
-                pattern *p = pattern::pattern_by_number( 1 + note_to_y( ev_note ) );
-
-                if ( p )
-                {
-                    if ( e->is_note_on() )
-                    {
-                        p->trigger( ts, offset + e->link()->timestamp() );
-                        p->play( ts, end );
-                    }
-                    else
-                        if ( e->is_note_off() )
-                            p->stop();
-                }
+                pattern *p = pattern::pattern_by_number( 1 + note_to_y( e->note() ) );
+
+                if ( ! p->playing() )
+                    p->trigger( ts, offset + e->link()->timestamp() );
+
+                p->play( start, end );
             }
         }
     }
+
     // ran out of events, but there's still some loop left to play.
     offset += d->length;
     goto try_again;