Mixbus enforces output port count
[ardour.git] / libs / ardour / route.cc
index c0cbcf21dcf472547530ca10792db86aec4810d3..1db571385fbd98de2427b63fba3dbb148f013394 100644 (file)
@@ -79,6 +79,7 @@ using namespace PBD;
 PBD::Signal0<void> Route::SyncOrderKeys;
 PBD::Signal0<void> Route::RemoteControlIDChange;
 
+/** Base class for all routable/mixable objects (tracks and busses) */
 Route::Route (Session& sess, string name, Flag flg, DataType default_type)
        : SessionObject (sess, name)
        , Automatable (sess)
@@ -115,6 +116,7 @@ Route::Route (Session& sess, string name, Flag flg, DataType default_type)
        , _track_number (0)
        , _in_configure_processors (false)
        , _initial_io_setup (false)
+       , _in_sidechain_setup (false)
        , _strict_io (false)
        , _custom_meter_position_noted (false)
 {
@@ -1464,7 +1466,6 @@ Route::add_processors (const ProcessorList& others, boost::shared_ptr<Processor>
                        boost::shared_ptr<PluginInsert> pi;
 
                        if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
-                               pi->set_count (1); // why? configure_processors_unlocked() will re-do this
                                pi->set_strict_io (_strict_io);
                        }
 
@@ -1769,9 +1770,15 @@ Route::remove_processor (boost::shared_ptr<Processor> processor, ProcessorStream
                                   run.
                                */
 
-                               boost::shared_ptr<IOProcessor> iop;
+                               boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor> (*i);
+                               boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(*i);
 
-                               if ((iop = boost::dynamic_pointer_cast<IOProcessor> (*i)) != 0) {
+                               if (pi != 0) {
+                                       assert (iop == 0);
+                                       iop = pi->sidechain();
+                               }
+
+                               if (iop != 0) {
                                        iop->disconnect ();
                                }
 
@@ -1963,9 +1970,14 @@ Route::remove_processors (const ProcessorList& to_be_deleted, ProcessorStreams*
                           run.
                        */
 
-                       boost::shared_ptr<IOProcessor> iop;
+                       boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor>(processor);
+                       boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(processor);
+                       if (pi != 0) {
+                               assert (iop == 0);
+                               iop = pi->sidechain();
+                       }
 
-                       if ((iop = boost::dynamic_pointer_cast<IOProcessor> (processor)) != 0) {
+                       if (iop != 0) {
                                iop->disconnect ();
                        }
 
@@ -2068,6 +2080,34 @@ Route::try_configure_processors_unlocked (ChanCount in, ProcessorStreams* err)
        for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p, ++index) {
 
                if ((*p)->can_support_io_configuration(in, out)) {
+
+                       if (boost::dynamic_pointer_cast<Delivery> (*p)
+                                       && boost::dynamic_pointer_cast<Delivery> (*p)->role() == Delivery::Main
+#ifndef MIXBUS
+                                       && _strict_io
+#endif
+                                       ) {
+                               /* with strict I/O the panner + output are forced to
+                                * follow the last processor's output.
+                                *
+                                * Delivery::can_support_io_configuration() will only add ports,
+                                * but not remove excess ports.
+                                *
+                                * This works because the delivery only requires
+                                * as many outputs as there are inputs.
+                                * Delivery::configure_io() will do the actual removal
+                                * by calling _output->ensure_io()
+                                */
+                               if (!is_master() && _session.master_out ()) {
+                                       /* ..but at least as many as there are master-inputs */
+                                       // XXX this may need special-casing for mixbus (master-outputs)
+                                       // and should maybe be a preference anyway ?!
+                                       out = ChanCount::max (in, _session.master_out ()->n_inputs ());
+                               } else {
+                                       out = in;
+                               }
+                       }
+
                        DEBUG_TRACE (DEBUG::Processors, string_compose ("\t%1 ID=%2 in=%3 out=%4\n",(*p)->name(), (*p)->id(), in, out));
                        configuration.push_back(make_pair(in, out));
 
@@ -2162,16 +2202,18 @@ Route::configure_processors_unlocked (ProcessorStreams* err)
                processor_max_streams = ChanCount::max(processor_max_streams, c->first);
                processor_max_streams = ChanCount::max(processor_max_streams, c->second);
 
+               boost::shared_ptr<IOProcessor> iop;
                boost::shared_ptr<PluginInsert> pi;
                if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*p)) != 0) {
                        /* plugins connected via Split or Hide Match may have more channels.
                         * route/scratch buffers are needed for all of them
                         * The configuration may only be a subset (both input and output)
                         */
-                       processor_max_streams = ChanCount::max(processor_max_streams, pi->input_streams());
-                       processor_max_streams = ChanCount::max(processor_max_streams, pi->output_streams());
-                       processor_max_streams = ChanCount::max(processor_max_streams, pi->natural_input_streams() * pi->get_count());
-                       processor_max_streams = ChanCount::max(processor_max_streams, pi->natural_output_streams() * pi->get_count());
+                       processor_max_streams = ChanCount::max(processor_max_streams, pi->required_buffers());
+               }
+               else if ((iop = boost::dynamic_pointer_cast<IOProcessor>(*p)) != 0) {
+                       processor_max_streams = ChanCount::max(processor_max_streams, iop->natural_input_streams());
+                       processor_max_streams = ChanCount::max(processor_max_streams, iop->natural_output_streams());
                }
                out = c->second;
 
@@ -2404,6 +2446,68 @@ Route::reorder_processors (const ProcessorList& new_order, ProcessorStreams* err
        return 0;
 }
 
+bool
+Route::add_remove_sidechain (boost::shared_ptr<Processor> proc, bool add)
+{
+       boost::shared_ptr<PluginInsert> pi;
+       if ((pi = boost::dynamic_pointer_cast<PluginInsert>(proc)) == 0) {
+               return false;
+       }
+
+       if (pi->has_sidechain () == add) {
+               return true; // ?? call failed, but result is as expected.
+       }
+
+       {
+               Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
+               ProcessorList::iterator i = find (_processors.begin(), _processors.end(), proc);
+               if (i == _processors.end ()) {
+                       return false;
+               }
+       }
+
+       {
+               Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ()); // take before Writerlock to avoid deadlock
+               Glib::Threads::RWLock::WriterLock lm (_processor_lock);
+               PBD::Unwinder<bool> uw (_in_sidechain_setup, true);
+
+               lx.release (); // IO::add_port() and ~IO takes process lock  - XXX check if this is safe
+               if (add) {
+                       if (!pi->add_sidechain ()) {
+                               return false;
+                       }
+               } else {
+                       if (!pi->del_sidechain ()) {
+                               return false;
+                       }
+               }
+
+               lx.acquire ();
+               list<pair<ChanCount, ChanCount> > c = try_configure_processors_unlocked (n_inputs (), 0);
+               lx.release ();
+
+               if (c.empty()) {
+                       if (add) {
+                               pi->del_sidechain ();
+                       } else {
+                               pi->add_sidechain ();
+                               // TODO restore side-chain's state.
+                       }
+                       return false;
+               }
+               lx.acquire ();
+               configure_processors_unlocked (0);
+       }
+
+       if (pi->has_sidechain ()) {
+               pi->sidechain_input ()->changed.connect_same_thread (*this, boost::bind (&Route::sidechain_change_handler, this, _1, _2));
+       }
+
+       processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
+       _session.set_dirty ();
+       return true;
+}
+
 bool
 Route::reset_plugin_insert (boost::shared_ptr<Processor> proc)
 {
@@ -2420,15 +2524,9 @@ Route::customize_plugin_insert (boost::shared_ptr<Processor> proc, uint32_t coun
        }
 
        {
-               bool found = false;
                Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
-               for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p) {
-                       if (*p == proc) {
-                               found = true;
-                               break;
-                       }
-               }
-               if (!found) {
+               ProcessorList::iterator i = find (_processors.begin(), _processors.end(), proc);
+               if (i == _processors.end ()) {
                        return false;
                }
        }
@@ -2436,7 +2534,6 @@ Route::customize_plugin_insert (boost::shared_ptr<Processor> proc, uint32_t coun
        {
                Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
                Glib::Threads::RWLock::WriterLock lm (_processor_lock);
-               ProcessorState pstate (this);
 
                bool      old_cust = pi->custom_cfg ();
                uint32_t  old_cnt  = pi->get_count ();
@@ -3238,6 +3335,12 @@ Route::set_processor_state (const XMLNode& node)
                                        processor.reset (new UnknownProcessor (_session, **niter));
                                }
 
+                               /* subscribe to Sidechain IO changes */
+                               boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert> (processor);
+                               if (pi && pi->has_sidechain ()) {
+                                       pi->sidechain_input ()->changed.connect_same_thread (*this, boost::bind (&Route::sidechain_change_handler, this, _1, _2));
+                               }
+
                                /* we have to note the monitor send here, otherwise a new one will be created
                                   and the state of this one will be lost.
                                */
@@ -3527,12 +3630,53 @@ Route::feeds (boost::shared_ptr<Route> other, bool* via_sends_only)
        return false;
 }
 
+IOVector
+Route::all_inputs () const
+{
+       /* TODO, if this works as expected,
+        * cache the IOVector and maintain it via
+        * input_change_handler(), sidechain_change_handler() etc
+        */
+       IOVector ios;
+       ios.push_back (_input);
+
+       Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
+       for (ProcessorList::const_iterator r = _processors.begin(); r != _processors.end(); ++r) {
+
+               boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor>(*r);
+               boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(*r);
+               if (pi != 0) {
+                       assert (iop == 0);
+                       iop = pi->sidechain();
+               }
+
+               if (iop != 0 && iop->input()) {
+                       ios.push_back (iop->input());
+               }
+       }
+       return ios;
+}
+
+IOVector
+Route::all_outputs () const
+{
+       IOVector ios;
+       // _output is included via Delivery
+       Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
+       for (ProcessorList::const_iterator r = _processors.begin(); r != _processors.end(); ++r) {
+               boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor>(*r);
+               if (iop != 0 && iop->output()) {
+                       ios.push_back (iop->output());
+               }
+       }
+       return ios;
+}
+
 bool
 Route::direct_feeds_according_to_reality (boost::shared_ptr<Route> other, bool* via_send_only)
 {
        DEBUG_TRACE (DEBUG::Graph, string_compose ("Feeds? %1\n", _name));
-
-       if (_output->connected_to (other->input())) {
+       if (other->all_inputs().fed_by (_output)) {
                DEBUG_TRACE (DEBUG::Graph, string_compose ("\tdirect FEEDS %2\n", other->name()));
                if (via_send_only) {
                        *via_send_only = false;
@@ -3542,12 +3686,19 @@ Route::direct_feeds_according_to_reality (boost::shared_ptr<Route> other, bool*
        }
 
 
+       Glib::Threads::RWLock::ReaderLock lm (_processor_lock); // XXX
        for (ProcessorList::iterator r = _processors.begin(); r != _processors.end(); ++r) {
 
-               boost::shared_ptr<IOProcessor> iop;
+               boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor>(*r);
+               boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(*r);
+               if (pi != 0) {
+                       assert (iop == 0);
+                       iop = pi->sidechain();
+               }
 
-               if ((iop = boost::dynamic_pointer_cast<IOProcessor>(*r)) != 0) {
-                       if (iop->feeds (other)) {
+               if (iop != 0) {
+                       boost::shared_ptr<const IO> iop_out = iop->output();
+                       if ((iop_out && other->all_inputs().fed_by (iop_out)) || iop->feeds (other)) {
                                DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tIOP %1 does feed %2\n", iop->name(), other->name()));
                                if (via_send_only) {
                                        *via_send_only = true;
@@ -3572,6 +3723,12 @@ Route::direct_feeds_according_to_graph (boost::shared_ptr<Route> other, bool* vi
        return _session._current_route_graph.has (shared_from_this (), other, via_send_only);
 }
 
+bool
+Route::feeds_according_to_graph (boost::shared_ptr<Route> other)
+{
+       return _session._current_route_graph.feeds (shared_from_this (), other);
+}
+
 /** Called from the (non-realtime) butler thread when the transport is stopped */
 void
 Route::nonrealtime_handle_transport_stopped (bool /*abort_ignored*/, bool /*did_locate*/, bool can_flush_processors)
@@ -3741,6 +3898,21 @@ Route::output_change_handler (IOChange change, void * /*src*/)
        }
 }
 
+void
+Route::sidechain_change_handler (IOChange change, void * /*src*/)
+{
+       if (_initial_io_setup || _in_sidechain_setup) {
+               return;
+       }
+
+       if ((change.type & IOChange::ConfigurationChanged)) {
+               /* This is called with the process lock held if change
+                  contains ConfigurationChanged
+               */
+               configure_processors (0);
+       }
+}
+
 uint32_t
 Route::pans_required () const
 {
@@ -4589,6 +4761,9 @@ Route::input_port_count_changing (ChanCount to)
 bool
 Route::output_port_count_changing (ChanCount to)
 {
+       if (_strict_io && !_in_configure_processors) {
+               return true;
+       }
        for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                if (processor_out_streams.get(*t) > to.get(*t)) {
                        return true;