fix crash when copy'ing latent plugins
[ardour.git] / libs / ardour / io_processor.cc
index 53fbda24c7fda7fd58277ecd2956db617a08149e..61bb97f0ad82a392721a4c6100dc562a697a6af6 100644 (file)
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2001 Paul Davis 
+    Copyright (C) 2001 Paul Davis
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
 
 */
 
-#include <fstream>
-#include <algorithm>
+#include <list>
 #include <string>
-#include <cerrno>
-#include <unistd.h>
-#include <sstream>
-
-#include <sigc++/bind.h>
 
 #include "pbd/xml++.h"
 #include "pbd/enumwriter.h"
 
-#include "ardour/io_processor.h"
-#include "ardour/session.h"
-#include "ardour/utils.h"
-#include "ardour/send.h"
-#include "ardour/port_insert.h"
-#include "ardour/plugin_insert.h"
+#include "ardour/chan_count.h"
+#include "ardour/data_type.h"
 #include "ardour/io.h"
+#include "ardour/io_processor.h"
+#include "ardour/processor.h"
+#include "ardour/route.h"
+#include "ardour/session_object.h"
+#include "ardour/types.h"
 
-#include "i18n.h"
+#include "pbd/i18n.h"
 
 using namespace std;
 using namespace ARDOUR;
 using namespace PBD;
 
-IOProcessor::IOProcessor (Session& s, const string& proc_name, const string io_name, DataType dtype)
+namespace ARDOUR { class Session; }
+
+/* create an IOProcessor that proxies to a new IO object */
+
+IOProcessor::IOProcessor (Session& s, bool with_input, bool with_output,
+                         const string& proc_name, const string io_name, DataType dtype, bool sendish)
        : Processor(s, proc_name)
-       , _io (new IO(s, io_name != "" ? io_name : proc_name, dtype))
 {
-       _active = false;
-       _sort_key = 0;
-       _gui = 0;
-       _extra_xml = 0;
+       /* these are true in this constructor whether we actually create the associated
+          IO objects or not.
+       */
+
+       _own_input = true;
+       _own_output = true;
+
+       if (with_input) {
+               _input.reset (new IO(s, io_name.empty() ? proc_name : io_name, IO::Input, dtype, sendish));
+       }
+
+       if (with_output) {
+               _output.reset (new IO(s, io_name.empty() ? proc_name : io_name, IO::Output, dtype, sendish));
+       }
 }
 
-IOProcessor::IOProcessor (Session& s, IO* io, const string& proc_name, DataType dtype)
+/* create an IOProcessor that proxies to an existing IO object */
+
+IOProcessor::IOProcessor (Session& s, boost::shared_ptr<IO> in, boost::shared_ptr<IO> out,
+                         const string& proc_name, DataType /*dtype*/)
        : Processor(s, proc_name)
-       , _io (io)
+       , _input (in)
+       , _output (out)
 {
-       _active = false;
-       _sort_key = 0;
-       _gui = 0;
-       _extra_xml = 0;
+       if (in) {
+               _own_input = false;
+       } else {
+               _own_input = true;
+       }
+
+       if (out) {
+               _own_output = false;
+       } else {
+               _own_output = true;
+       }
 }
 
 IOProcessor::~IOProcessor ()
 {
-       notify_callbacks ();
+}
+
+void
+IOProcessor::set_input (boost::shared_ptr<IO> io)
+{
+       /* CALLER MUST HOLD PROCESS LOCK */
+
+       _input = io;
+       _own_input = false;
+}
+
+void
+IOProcessor::set_output (boost::shared_ptr<IO> io)
+{
+       /* CALLER MUST HOLD PROCESS LOCK */
+
+       _output = io;
+       _own_output = false;
 }
 
 XMLNode&
 IOProcessor::state (bool full_state)
 {
-       XMLNode& node = Processor::state(full_state);
-       
-       node.add_child_nocopy (_io->state (full_state));
+       XMLNode& node (Processor::state (full_state));
+
+       if (_own_input) {
+               node.add_property ("own-input", "yes");
+               if (_input) {
+                       XMLNode& i (_input->state (full_state));
+                       // i.name() = X_("output");
+                       node.add_child_nocopy (i);
+               }
+       } else {
+               node.add_property ("own-input", "no");
+               if (_input) {
+                       node.add_property ("input", _input->name());
+               }
+       }
+
+       if (_own_output) {
+               node.add_property ("own-output", "yes");
+               if (_output) {
+                       XMLNode& o (_output->state (full_state));
+                       node.add_child_nocopy (o);
+               }
+       } else {
+               node.add_property ("own-output", "no");
+               if (_output) {
+                       node.add_property ("output", _output->name());
+               }
+       }
 
        return node;
 }
 
 int
-IOProcessor::set_state (const XMLNode& node)
+IOProcessor::set_state (const XMLNode& node, int version)
 {
-       const XMLProperty *prop;
+       if (version < 3000) {
+               return set_state_2X (node, version);
+       }
+
+       XMLProperty const * prop;
        const XMLNode *io_node = 0;
 
-       Processor::set_state(node);
+       Processor::set_state(node, version);
+
+
+       if ((prop = node.property ("own-input")) != 0) {
+               _own_input = string_is_affirmative (prop->value());
+       }
+
+       if ((prop = node.property ("own-output")) != 0) {
+               _own_output = string_is_affirmative (prop->value());
+       }
+
+       /* don't attempt to set state for a proxied IO that we don't own */
 
        XMLNodeList nlist = node.children();
        XMLNodeIterator niter;
+       const string instr = enum_2_string (IO::Input);
+       const string outstr = enum_2_string (IO::Output);
 
-       for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
-               if ((*niter)->name() == IO::state_node_name) {
-                       io_node = (*niter);
-                       break;
-               } else if ((*niter)->name() == "Redirect") {
-                       XMLNodeList rlist = (*niter)->children();
-                       XMLNodeIterator riter;
-
-                       for (riter = rlist.begin(); riter != rlist.end(); ++riter) {
-                               if ( (*riter)->name() == IO::state_node_name) {
-                                       warning << _("Found legacy IO in a redirect") << endmsg;
-                                       io_node = (*riter);
-                                       break;
+       if (_own_input && _input) {
+               for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
+                       XMLProperty const * prop;
+                       if ((prop = (*niter)->property ("name")) != 0) {
+                               if (_name == prop->value()) {
+                                       if ((prop = (*niter)->property ("direction")) != 0) {
+                                               if (prop->value() == instr) {
+                                                       io_node = (*niter);
+                                                       break;
+                                               }
+                                       }
                                }
                        }
                }
-       }
 
-       if (io_node) {
-               _io->set_state(*io_node);
+               if (io_node) {
+                       _input->set_state(*io_node, version);
+
+                       // legacy sessions: use IO name
+                       if ((prop = node.property ("name")) == 0) {
+                               set_name (_input->name());
+                       }
 
-               // legacy sessions: use IO name
-               if ((prop = node.property ("name")) == 0) {
-                       set_name(_io->name());
+               } else {
+                       /* no input, which is OK */
                }
 
-       } else {
-               error << _("XML node describing a redirect is missing an IO node") << endmsg;
-               return -1;
+       }
+
+       if (_own_output && _output) {
+               for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
+                       if ((*niter)->name() == "IO") {
+                               XMLProperty const * prop;
+                               if ((prop = (*niter)->property ("name")) != 0) {
+                                       if (_name == prop->value()) {
+                                               if ((prop = (*niter)->property ("direction")) != 0) {
+                                                       if (prop->value() == outstr) {
+                                                               io_node = (*niter);
+                                                               break;
+                                                       }
+                                               }
+                                       }
+                               }
+                       }
+               }
+
+               if (io_node) {
+                       _output->set_state(*io_node, version);
+
+                       // legacy sessions: use IO name
+                       if ((prop = node.property ("name")) == 0) {
+                               set_name (_output->name());
+                       }
+               } else {
+                       /* no output, which is OK */
+               }
        }
 
        return 0;
 }
 
-void
-IOProcessor::silence (nframes_t nframes)
+int
+IOProcessor::set_state_2X (const XMLNode& node, int version)
 {
-       _io->silence (nframes);
+       _own_input = _own_output = true;
+
+       Processor::set_state_2X (node, version);
+
+       return 0;
 }
 
-ChanCount
-IOProcessor::output_streams() const
+void
+IOProcessor::silence (framecnt_t nframes, framepos_t /* start_frame */)
 {
-       return _io->n_outputs();
+       if (_own_output && _output) {
+               _output->silence (nframes);
+       }
 }
 
-ChanCount
-IOProcessor::input_streams () const
+void
+IOProcessor::increment_port_buffer_offset (pframes_t offset)
 {
-       return _io->n_inputs();
+        if (_own_output && _output) {
+                _output->increment_port_buffer_offset (offset);
+        }
 }
 
 ChanCount
 IOProcessor::natural_output_streams() const
 {
-       return _io->n_outputs();
+       return _output ? _output->n_ports() : ChanCount::ZERO;
 }
 
 ChanCount
 IOProcessor::natural_input_streams () const
 {
-       return _io->n_inputs();
+       return _input ? _input->n_ports() : ChanCount::ZERO;
+}
+
+bool
+IOProcessor::set_name (const std::string& name)
+{
+       bool ret = SessionObject::set_name (name);
+
+       if (ret && _own_input && _input) {
+               ret = _input->set_name (name);
+       }
+
+       if (ret && _own_output && _output) {
+               ret = _output->set_name (name);
+       }
+
+       return ret;
+}
+
+bool
+IOProcessor::feeds (boost::shared_ptr<Route> other) const
+{
+       return _output && _output->connected_to (other->input());
 }
 
 void
-IOProcessor::automation_snapshot (nframes_t now, bool force)
+IOProcessor::disconnect ()
 {
-       _io->automation_snapshot(now, force);
+       if (_input) {
+               _input->disconnect (this);
+       }
+
+       if (_output) {
+               _output->disconnect (this);
+       }
 }
 
+/** Set up the XML description of a send so that we will not
+ *  reset its name or bitslot during ::set_state()
+ *  @param state XML send state.
+ *  @param session Session.
+ */
+void
+IOProcessor::prepare_for_reset (XMLNode &state, const std::string& name)
+{
+       state.add_property ("ignore-bitslot", "1");
+       state.add_property ("ignore-name", "1");
+
+       XMLNode* io_node = state.child (IO::state_node_name.c_str());
+
+       if (io_node) {
+               IO::prepare_for_reset (*io_node, name);
+       }
+}