Merged with trunk R1705.
[ardour.git] / libs / ardour / session_process.cc
index e99478e0b40e73aa63f3ab353ef955e1754bdf36..f0c4a29aa9da18a7f4d4c8870e96b8b300edc666 100644 (file)
@@ -15,7 +15,6 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id$
 */
 
 #include <cmath>
@@ -46,7 +45,7 @@ using namespace PBD;
 using namespace std;
 
 void
-Session::process (jack_nframes_t nframes)
+Session::process (nframes_t nframes)
 {
        MIDI::Manager::instance()->cycle_start(nframes);
 
@@ -57,7 +56,7 @@ Session::process (jack_nframes_t nframes)
        }
 
        if (non_realtime_work_pending()) {
-               if (g_atomic_int_get (&butler_should_do_transport_work) == 0) {
+               if (!transport_work_requested ()) {
                        post_transport ();
                } 
        } 
@@ -79,9 +78,9 @@ Session::prepare_diskstreams ()
 }
 
 int
-Session::no_roll (jack_nframes_t nframes, jack_nframes_t offset)
+Session::no_roll (nframes_t nframes, nframes_t offset)
 {
-       jack_nframes_t end_frame = _transport_frame + nframes; // FIXME: varispeed + no_roll ??
+       nframes_t end_frame = _transport_frame + nframes; // FIXME: varispeed + no_roll ??
        int ret = 0;
        bool declick = get_transport_declick_required();
        boost::shared_ptr<RouteList> r = routes.reader ();
@@ -117,7 +116,7 @@ Session::no_roll (jack_nframes_t nframes, jack_nframes_t offset)
 }
 
 int
-Session::process_routes (jack_nframes_t nframes, jack_nframes_t offset)
+Session::process_routes (nframes_t nframes, nframes_t offset)
 {
        bool record_active;
        int  declick = get_transport_declick_required();
@@ -165,7 +164,7 @@ Session::process_routes (jack_nframes_t nframes, jack_nframes_t offset)
 }
 
 int
-Session::silent_process_routes (jack_nframes_t nframes, jack_nframes_t offset)
+Session::silent_process_routes (nframes_t nframes, nframes_t offset)
 {
        bool record_active = actively_recording();
        int  declick = get_transport_declick_required();
@@ -209,7 +208,7 @@ Session::silent_process_routes (jack_nframes_t nframes, jack_nframes_t offset)
 }
 
 void
-Session::commit_diskstreams (jack_nframes_t nframes, bool &needs_butler)
+Session::commit_diskstreams (nframes_t nframes, bool &needs_butler)
 {
        int dret;
        float pworst = 1.0f;
@@ -223,6 +222,9 @@ Session::commit_diskstreams (jack_nframes_t nframes, bool &needs_butler)
                }
                
                /* force all diskstreams not handled by a Route to call do their stuff.
+                  Note: the diskstreams that were handled by a route will just return zero
+                  from this call, because they know they were processed. So in fact, this
+                  also runs commit() for every diskstream.
                 */
 
                if ((dret = (*i)->process (_transport_frame, nframes, 0, actively_recording(), get_rec_monitors_input())) == 0) {
@@ -255,13 +257,13 @@ Session::commit_diskstreams (jack_nframes_t nframes, bool &needs_butler)
 
 
 void
-Session::process_with_events (jack_nframes_t nframes)
+Session::process_with_events (nframes_t nframes)
 {
        Event*         ev;
-       jack_nframes_t this_nframes;
-       jack_nframes_t end_frame;
-       jack_nframes_t offset;
-       jack_nframes_t stop_limit;
+       nframes_t this_nframes;
+       nframes_t end_frame;
+       nframes_t offset;
+       nframes_t stop_limit;
        long           frames_moved;
        bool           session_needs_butler = false;
 
@@ -306,7 +308,7 @@ Session::process_with_events (jack_nframes_t nframes)
                return;
        }
 
-       end_frame = _transport_frame + nframes;
+       end_frame = _transport_frame + (nframes_t)abs(floor(nframes * _transport_speed));
 
        {
                Event* this_event;
@@ -354,20 +356,15 @@ Session::process_with_events (jack_nframes_t nframes)
 
                while (nframes) {
 
-                       if (this_event == 0 || this_event->action_frame > end_frame || this_event->action_frame < _transport_frame) {
+                       this_nframes = nframes; /* real (jack) time relative */
+                       frames_moved = (long) floor (_transport_speed * nframes); /* transport relative */
 
-                               this_nframes = nframes;
-                               
-                       } else {
-                               
-                               /* compute nframes to next event */
-
-                               if (this_event->action_frame < end_frame) {
-                                       this_nframes = nframes - (end_frame - this_event->action_frame);
-                               } else {
-                                       this_nframes = nframes;
-                               }
-                       }
+                       /* running an event, position transport precisely to its time */
+                       if (this_event && this_event->action_frame <= end_frame && this_event->action_frame >= _transport_frame) {
+                               /* this isn't quite right for reverse play */
+                               frames_moved = (long) (this_event->action_frame - _transport_frame);
+                               this_nframes = (nframes_t) abs( floor(frames_moved / _transport_speed) );
+                       } 
 
                        if (this_nframes) {
                                
@@ -386,8 +383,6 @@ Session::process_with_events (jack_nframes_t nframes)
                                nframes -= this_nframes;
                                offset += this_nframes;
                                
-                               frames_moved = (jack_nframes_t) floor (_transport_speed * this_nframes);
-                       
                                if (frames_moved < 0) {
                                        decrement_transport_position (-frames_moved);
                                } else {
@@ -419,8 +414,7 @@ Session::process_with_events (jack_nframes_t nframes)
                        }
 
                        /* this is necessary to handle the case of seamless looping */
-                       /* not sure if it will work in conjuction with varispeed */
-                       end_frame = _transport_frame + nframes;
+                       end_frame = _transport_frame + (nframes_t) floor (nframes * _transport_speed);
                        
                }
 
@@ -446,7 +440,7 @@ Session::transport_locked () const
 {
        Slave* sl = _slave;
 
-       if (!locate_pending() && ((_slave_type == None) || (sl && sl->ok() && sl->locked()))) {
+       if (!locate_pending() && ((Config->get_slave_source() == None) || (sl && sl->ok() && sl->locked()))) {
                return true;
        }
 
@@ -454,17 +448,17 @@ Session::transport_locked () const
 }
 
 bool
-Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
+Session::follow_slave (nframes_t nframes, nframes_t offset)
 {
        float slave_speed;
-       jack_nframes_t slave_transport_frame;
-       jack_nframes_t this_delta;
+       nframes_t slave_transport_frame;
+       nframes_t this_delta;
        int dir;
        bool starting;
 
        if (!_slave->ok()) {
                stop_transport ();
-               set_slave_source (None, 0);
+               Config->set_slave_source (None);
                goto noroll;
        }
        
@@ -555,9 +549,9 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
 
                                Location* al = _locations.auto_loop_location();
 
-                               if (al && auto_loop && (slave_transport_frame < al->start() || slave_transport_frame > al->end())) {
+                               if (al && play_loop && (slave_transport_frame < al->start() || slave_transport_frame > al->end())) {
                                        // cancel looping
-                                       request_auto_loop(false);
+                                       request_play_loop(false);
                                }
 
                                if (slave_transport_frame != _transport_frame) {
@@ -583,7 +577,7 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
                                slave_state = Running;
 
                                bool ok = true;
-                               jack_nframes_t frame_delta = slave_transport_frame - _transport_frame;
+                               nframes_t frame_delta = slave_transport_frame - _transport_frame;
 
                                boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
                                
@@ -605,7 +599,7 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
                                        /* XXX what? */
                                }
 
-                               memset (delta_accumulator, 0, sizeof (jack_nframes_t) * delta_accumulator_size);
+                               memset (delta_accumulator, 0, sizeof (nframes_t) * delta_accumulator_size);
                                average_slave_delta = 0;
                                this_delta = 0;
                        }
@@ -628,7 +622,7 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
                        // << " tf = " << _transport_frame
                        // << endl;
                        
-                       if (_slave_type == JACK) {
+                       if (Config->get_slave_source() == JACK) {
                                last_stop_frame = _transport_frame;
                        }
 
@@ -676,7 +670,7 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
                        request_transport_speed (adjusted_speed);
                        
 #if 1
-                       if ((jack_nframes_t) average_slave_delta > _slave->resolution()) {
+                       if ((nframes_t) average_slave_delta > _slave->resolution()) {
                                // cerr << "not locked\n";
                                goto silent_motion;
                        }
@@ -715,7 +709,7 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
                        increment_transport_position (frames_moved);
                }
                
-               jack_nframes_t stop_limit;
+               nframes_t stop_limit;
                
                if (actively_recording()) {
                        stop_limit = max_frames;
@@ -737,12 +731,13 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
 }
 
 void
-Session::process_without_events (jack_nframes_t nframes)
+Session::process_without_events (nframes_t nframes)
 {
        bool session_needs_butler = false;
-       jack_nframes_t stop_limit;
+       nframes_t stop_limit;
        long frames_moved;
-       
+       nframes_t offset = 0;
+
        {
                if (post_transport_work & (PostTransportLocate|PostTransportStop)) {
                        no_roll (nframes, 0);
@@ -777,16 +772,20 @@ Session::process_without_events (jack_nframes_t nframes)
                        return;
                } 
 
-               click (_transport_frame, nframes, 0);
+               if (maybe_sync_start (nframes, offset)) {
+                       return;
+               }
+
+               click (_transport_frame, nframes, offset);
 
                prepare_diskstreams ();
        
                frames_moved = (long) floor (_transport_speed * nframes);
 
-               if (process_routes (nframes, 0)) {
-                       no_roll (nframes, 0);
-                       return;
-               }
+               if (process_routes (nframes, offset)) {
+                       no_roll (nframes, offset);
+                       return;
+               }
 
                commit_diskstreams (nframes, session_needs_butler);
 
@@ -795,7 +794,7 @@ Session::process_without_events (jack_nframes_t nframes)
                } else {
                        increment_transport_position (frames_moved);
                }
-               
+
                maybe_stop (stop_limit);
                check_declick_out ();
 
@@ -806,7 +805,7 @@ Session::process_without_events (jack_nframes_t nframes)
 }
 
 void
-Session::process_audition (jack_nframes_t nframes)
+Session::process_audition (nframes_t nframes)
 {
        Event* ev;
        boost::shared_ptr<RouteList> r = routes.reader ();
@@ -845,3 +844,31 @@ Session::process_audition (jack_nframes_t nframes)
        }
 }
 
+bool
+Session::maybe_sync_start (nframes_t& nframes, nframes_t& offset)
+{
+       nframes_t sync_offset;
+       
+       if (!waiting_for_sync_offset) {
+               return false;
+       }
+
+       if (_engine.get_sync_offset (sync_offset) && sync_offset < nframes) {
+
+               no_roll (sync_offset, 0);
+               nframes -= sync_offset;
+               offset += sync_offset;
+               waiting_for_sync_offset = false;
+               
+               if (nframes == 0) {
+                       return true; // done
+               }
+               
+       } else {
+               no_roll (nframes, 0);
+               return true; // done
+       }
+
+       return false;
+}
+