various fixes to named selection mgmt and display, plus fixes for xfade mgmt and...
[ardour.git] / libs / ardour / session_process.cc
index 01e75a4749e3e77e8598782c022419c97117ee00..06ba4e304ec5ba67cc3c8b5e39ecad4a6c5438d3 100644 (file)
 #include <algorithm>
 #include <unistd.h>
 
-#include <ardour/timestamps.h>
-
 #include <pbd/error.h>
-#include <pbd/atomic.h>
-#include <pbd/lockmonitor.h>
+#include <glibmm/thread.h>
 
 #include <ardour/ardour.h>
 #include <ardour/session.h>
-#include <ardour/diskstream.h>
+#include <ardour/timestamps.h>
+#include <ardour/audio_diskstream.h>
 #include <ardour/audioengine.h>
 #include <ardour/slave.h>
 #include <ardour/auditioner.h>
 #include "i18n.h"
 
 using namespace ARDOUR;
-//using namespace sigc;
+using namespace PBD;
 using namespace std;
 
 void
-Session::process (jack_nframes_t nframes)
+Session::process (nframes_t nframes)
 {
        if (synced_to_jack() && waiting_to_start) {
                if ( _engine.transport_state() == AudioEngine::TransportRolling) {
@@ -54,45 +53,45 @@ Session::process (jack_nframes_t nframes)
        }
 
        if (non_realtime_work_pending()) {
-               if (atomic_read (&butler_should_do_transport_work) == 0) {
+               if (!transport_work_requested ()) {
                        post_transport ();
                } 
        } 
        
        (this->*process_function) (nframes);
+
+       SendFeedback (); /* EMIT SIGNAL */
 }
 
 void
 Session::prepare_diskstreams ()
 {
-       for (DiskStreamList::iterator i = diskstreams.begin(); i != diskstreams.end(); ++i) {
+       boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
+       for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
                (*i)->prepare ();
        }
 }
 
 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;
+       nframes_t end_frame = _transport_frame + nframes;
        int ret = 0;
        bool declick = get_transport_declick_required();
+       boost::shared_ptr<RouteList> r = routes.reader ();
 
        if (_click_io) {
                _click_io->silence (nframes, offset);
        }
 
-       /* XXX we're supposed to have the route_lock while doing this.
-          this is really bad ...
-       */
-
-       if (atomic_read (&processing_prohibited)) {
-               for (RouteList::iterator i = routes.begin(); i != routes.end(); ++i) {
+       if (g_atomic_int_get (&processing_prohibited)) {
+               for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
                        (*i)->silence (nframes, offset);
                }
                return 0;
        }
 
-       for (RouteList::iterator i = routes.begin(); i != routes.end(); ++i) {
+       for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
                
                if ((*i)->hidden()) {
                        continue;
@@ -112,11 +111,12 @@ 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();
        bool rec_monitors = get_rec_monitors_input();
+       boost::shared_ptr<RouteList> r = routes.reader ();
 
        if (transport_sub_state & StopPendingCapture) {
                /* force a declick out */
@@ -125,7 +125,7 @@ Session::process_routes (jack_nframes_t nframes, jack_nframes_t offset)
 
        record_active = actively_recording(); // || (get_record_enabled() && get_punch_in());
 
-       for (RouteList::iterator i = routes.begin(); i != routes.end(); ++i) {
+       for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
 
                int ret;
 
@@ -137,12 +137,13 @@ Session::process_routes (jack_nframes_t nframes, jack_nframes_t offset)
 
                if ((ret = (*i)->roll (nframes, _transport_frame, _transport_frame + nframes, offset, declick, record_active, rec_monitors)) < 0) {
 
-                       /* we have to do this here. Route::roll() for an AudioTrack will have called DiskStream::process(),
-                          and the DS will expect DiskStream::commit() to be called. but we're aborting from that
+                       /* we have to do this here. Route::roll() for an AudioTrack will have called AudioDiskstream::process(),
+                          and the DS will expect AudioDiskstream::commit() to be called. but we're aborting from that
                           call path, so make sure we release any outstanding locks here before we return failure.
                        */
 
-                       for (DiskStreamList::iterator ids = diskstreams.begin(); ids != diskstreams.end(); ++ids) {
+                       boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
+                       for (DiskstreamList::iterator ids = dsl->begin(); ids != dsl->end(); ++ids) {
                                (*ids)->recover ();
                        }
 
@@ -155,18 +156,19 @@ 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();
        bool rec_monitors = get_rec_monitors_input();
+       boost::shared_ptr<RouteList> r = routes.reader ();
 
        if (transport_sub_state & StopPendingCapture) {
                /* force a declick out */
                declick = -1;
        }
 
-       for (RouteList::iterator i = routes.begin(); i != routes.end(); ++i) {
+       for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
 
                int ret;
 
@@ -176,12 +178,13 @@ Session::silent_process_routes (jack_nframes_t nframes, jack_nframes_t offset)
 
                if ((ret = (*i)->silent_roll (nframes, _transport_frame, _transport_frame + nframes, offset, record_active, rec_monitors)) < 0) {
                        
-                       /* we have to do this here. Route::roll() for an AudioTrack will have called DiskStream::process(),
-                          and the DS will expect DiskStream::commit() to be called. but we're aborting from that
+                       /* we have to do this here. Route::roll() for an AudioTrack will have called AudioDiskstream::process(),
+                          and the DS will expect AudioDiskstream::commit() to be called. but we're aborting from that
                           call path, so make sure we release any outstanding locks here before we return failure.
                        */
 
-                       for (DiskStreamList::iterator ids = diskstreams.begin(); ids != diskstreams.end(); ++ids) {
+                       boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
+                       for (DiskstreamList::iterator ids = dsl->begin(); ids != dsl->end(); ++ids) {
                                (*ids)->recover ();
                        }
 
@@ -194,13 +197,14 @@ 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;
        float cworst = 1.0f;
 
-       for (DiskStreamList::iterator i = diskstreams.begin(); i != diskstreams.end(); ++i) {
+       boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
+       for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
 
                if ((*i)->hidden()) {
                        continue;
@@ -222,15 +226,15 @@ Session::commit_diskstreams (jack_nframes_t nframes, bool &needs_butler)
                cworst = min (cworst, (*i)->capture_buffer_load());
        }
 
-       uint32_t pmin = atomic_read (&_playback_load);
-       uint32_t pminold = atomic_read (&_playback_load_min);
-       uint32_t cmin = atomic_read (&_capture_load);
-       uint32_t cminold = atomic_read (&_capture_load_min);
+       uint32_t pmin = g_atomic_int_get (&_playback_load);
+       uint32_t pminold = g_atomic_int_get (&_playback_load_min);
+       uint32_t cmin = g_atomic_int_get (&_capture_load);
+       uint32_t cminold = g_atomic_int_get (&_capture_load_min);
 
-       atomic_set (&_playback_load, (uint32_t) floor (pworst * 100.0f));
-       atomic_set (&_capture_load, (uint32_t) floor (cworst * 100.0f));
-       atomic_set (&_playback_load_min, min (pmin, pminold));
-       atomic_set (&_capture_load_min, min (cmin, cminold));
+       g_atomic_int_set (&_playback_load, (uint32_t) floor (pworst * 100.0f));
+       g_atomic_int_set (&_capture_load, (uint32_t) floor (cworst * 100.0f));
+       g_atomic_int_set (&_playback_load_min, min (pmin, pminold));
+       g_atomic_int_set (&_capture_load_min, min (cmin, cminold));
 
        if (actively_recording()) {
                set_dirty();
@@ -238,20 +242,24 @@ 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;
+       nframes_t this_nframes;
+       nframes_t end_frame;
+       nframes_t offset;
        bool session_needs_butler = false;
-       jack_nframes_t stop_limit;
+       nframes_t stop_limit;
        long           frames_moved;
 
+       /* make sure the auditioner is silent */
+
        if (auditioner) {
                auditioner->silence (nframes, 0);
        }
 
+       /* handle any pending events */
+
        while (pending_events.read (&ev, 1) == 1) {
                merge_event (ev);
        }
@@ -280,11 +288,10 @@ Session::process_with_events (jack_nframes_t nframes)
        end_frame = _transport_frame + nframes;
 
        {
-               TentativeLockMonitor rm (route_lock, __LINE__, __FILE__);
                Event* this_event;
                Events::iterator the_next_one;
-
-               if (!rm.locked() || (post_transport_work & (PostTransportLocate|PostTransportStop))) {
+               
+               if (post_transport_work & (PostTransportLocate|PostTransportStop)) {
                        no_roll (nframes, 0);
                        return;
                }
@@ -356,7 +363,7 @@ Session::process_with_events (jack_nframes_t nframes)
                                nframes -= this_nframes;
                                offset += this_nframes;
                                
-                               frames_moved = (jack_nframes_t) floor (_transport_speed * this_nframes);
+                               frames_moved = (nframes_t) floor (_transport_speed * this_nframes);
                        
                                if (frames_moved < 0) {
                                        decrement_transport_position (-frames_moved);
@@ -403,7 +410,7 @@ Session::process_with_events (jack_nframes_t nframes)
                summon_butler ();
        } 
        
-       if (!_engine.freewheeling() && send_mtc) {
+       if (!_engine.freewheeling() && session_send_mtc) {
                send_midi_time_code_in_another_thread ();
        }
 
@@ -420,17 +427,29 @@ Session::reset_slave_state ()
 }
 
 bool
-Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
+Session::transport_locked () const
+{
+       Slave* sl = _slave;
+
+       if (!locate_pending() && ((Config->get_slave_source() == None) || (sl && sl->ok() && sl->locked()))) {
+               return true;
+       }
+
+       return false;
+}
+
+bool
+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;
        }
        
@@ -521,9 +540,9 @@ 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) {
@@ -543,15 +562,18 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
                if (slave_state == Waiting) {
 
                        // cerr << "waiting at " << slave_transport_frame << endl;
-
+                       
                        if (slave_transport_frame >= slave_wait_end) {
                                // cerr << "\tstart at " << _transport_frame << endl;
+
                                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();
                                
-                               for (DiskStreamList::iterator i = diskstreams.begin(); i != diskstreams.end(); ++i) {
+                               for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
                                        if (!(*i)->can_internal_playback_seek (frame_delta)) {
                                                ok = false;
                                                break;
@@ -559,7 +581,7 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
                                }
 
                                if (ok) {
-                                       for (DiskStreamList::iterator i = diskstreams.begin(); i != diskstreams.end(); ++i) {
+                                       for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
                                                (*i)->internal_playback_seek (frame_delta);
                                        }
                                        _transport_frame += frame_delta;
@@ -569,7 +591,7 @@ 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;
                        }
@@ -592,7 +614,7 @@ 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;
                        }
 
@@ -640,7 +662,7 @@ 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;
                        }
@@ -662,7 +684,7 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
                */
 
                bool need_butler;
-
+               
                prepare_diskstreams ();
                silent_process_routes (nframes, offset);
                commit_diskstreams (nframes, need_butler);
@@ -671,7 +693,7 @@ Session::follow_slave (jack_nframes_t nframes, jack_nframes_t offset)
                        summon_butler ();
                }
                
-               jack_nframes_t frames_moved = (long) floor (_transport_speed * nframes);
+               int32_t frames_moved = (int32_t) floor (_transport_speed * nframes);
                
                if (frames_moved < 0) {
                        decrement_transport_position (-frames_moved);
@@ -679,7 +701,7 @@ 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;
@@ -701,16 +723,15 @@ 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;
-       
-       {
-               TentativeLockMonitor rm (route_lock, __LINE__, __FILE__);
+       nframes_t offset = 0;
 
-               if (!rm.locked() || (post_transport_work & (PostTransportLocate|PostTransportStop))) {
+       {
+               if (post_transport_work & (PostTransportLocate|PostTransportStop)) {
                        no_roll (nframes, 0);
                        return;
                }
@@ -741,16 +762,20 @@ 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);
 
@@ -759,7 +784,7 @@ Session::process_without_events (jack_nframes_t nframes)
                } else {
                        increment_transport_position (frames_moved);
                }
-               
+
                maybe_stop (stop_limit);
                check_declick_out ();
 
@@ -769,7 +794,7 @@ Session::process_without_events (jack_nframes_t nframes)
                summon_butler ();
        } 
        
-       if (!_engine.freewheeling() && send_mtc) {
+       if (!_engine.freewheeling() && session_send_mtc) {
                send_midi_time_code_in_another_thread ();
        }
 
@@ -777,23 +802,25 @@ Session::process_without_events (jack_nframes_t nframes)
 }              
 
 void
-Session::process_audition (jack_nframes_t nframes)
+Session::process_audition (nframes_t nframes)
 {
-       TentativeLockMonitor rm (route_lock, __LINE__, __FILE__);
        Event* ev;
+       boost::shared_ptr<RouteList> r = routes.reader ();
 
-       if (rm.locked()) {
-               for (RouteList::iterator i = routes.begin(); i != routes.end(); ++i) {
-                       if (!(*i)->hidden()) {
-                               (*i)->silence (nframes, 0);
-                       }
+       for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+               if (!(*i)->hidden()) {
+                       (*i)->silence (nframes, 0);
                }
        }
+
+       /* run the auditioner, and if it says we need butler service, ask for it */
        
        if (auditioner->play_audition (nframes) > 0) {
                summon_butler ();
        } 
 
+       /* handle pending events */
+
        while (pending_events.read (&ev, 1) == 1) {
                merge_event (ev);
        }
@@ -814,3 +841,31 @@ 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;
+}
+