Reworked use of Plugin class in engine slightly (more RAII-ey)

git-svn-id: http://svn.drobilla.net/lad/grauph@56 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 338 insertions, 0 deletions

diff --git a/src/libs/engine/DSSINode.cpp b/src/libs/engine/DSSINode.cpp
new file mode 100644
index 00000000..2eb72361
--- /dev/null
+++ b/src/libs/engine/DSSINode.cpp
@@ -0,0 +1,338 @@
+/* This file is part of Om.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Om is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ * 
+ * Om is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "DSSINode.h"
+#include <map>
+#include <set>
+#include "Om.h"
+#include "OmApp.h"
+#include "ClientBroadcaster.h"
+#include "interface/ClientInterface.h"
+#include "InputPort.h"
+
+using namespace std;
+
+namespace Om {
+
+
+DSSINode::DSSINode(const Plugin* plugin, const string& name, size_t poly, Patch* parent, DSSI_Descriptor* descriptor, samplerate srate, size_t buffer_size)
+: LADSPANode(plugin, name, 1, parent, descriptor->LADSPA_Plugin, srate, buffer_size),
+  _dssi_descriptor(descriptor),
+  _ui_addr(NULL),
+  _bank(-1),
+  _program(-1),
+  _midi_in_port(NULL),
+  _alsa_events(new snd_seq_event_t[_buffer_size]),
+  _alsa_encoder(NULL)
+{
+	snd_midi_event_new(3, &_alsa_encoder);
+}
+
+
+DSSINode::~DSSINode()
+{
+	if (_ui_addr != NULL)
+		lo_address_free(_ui_addr);
+
+	snd_midi_event_free(_alsa_encoder);
+	delete [] _alsa_events;
+}
+
+
+/** This needs to be overridden here because LADSPANode::instantiate()
+ *  allocates the port array, and we want to add the MIDI input port to that
+ *  array.
+ */
+bool
+DSSINode::instantiate()
+{
+	assert(!_ports);
+	
+	if (has_midi_input()) {
+		_ports = new Array<Port*>(_descriptor->PortCount + 1);
+		_midi_in_port = new InputPort<MidiMessage>(this, "MIDI In", _ports->size()-1, 1, DataType::MIDI, _buffer_size);
+		_ports->at(_ports->size()-1) = _midi_in_port;
+	}	
+
+	// LADSPANode::instantiate checks if _ports is already allocated
+	if (!LADSPANode::instantiate()) {
+		delete _ports;
+		return false;
+	}
+	
+	return true;
+}
+
+
+void
+DSSINode::activate()
+{
+	LADSPANode::activate();
+	
+	update_programs(false);
+	set_default_program();
+	
+	snd_midi_event_reset_encode(_alsa_encoder);
+}
+
+
+void
+DSSINode::set_ui_url(const string& url)
+{
+	if (_ui_addr != NULL)
+		lo_address_free(_ui_addr);
+	
+	_ui_url = url;
+	_ui_addr = lo_address_new_from_url(url.c_str());
+	char* base_path = lo_url_get_path(url.c_str());
+	_ui_base_path = base_path;
+	free(base_path);
+	cerr << "Set UI base path to " << _ui_base_path << endl;
+}
+
+
+void
+DSSINode::set_control(size_t port_num, sample val)
+{
+	assert(port_num < _descriptor->PortCount);
+	((PortBase<sample>*)_ports->at(port_num))->set_value(val, 0);
+}
+
+
+void
+DSSINode::configure(const string& key, const string& val)
+{
+	_dssi_descriptor->configure(_instances[0], key.c_str(), val.c_str());
+	_configures[key] = val;
+	update_programs(true);
+}
+
+
+void
+DSSINode::program(int bank, int program)
+{
+	if (_dssi_descriptor->select_program)
+		_dssi_descriptor->select_program(_instances[0], bank, program);
+
+	_bank = bank;
+	_program = program;
+}
+
+
+void
+DSSINode::convert_events()
+{
+	assert(has_midi_input());
+	assert(_midi_in_port != NULL);
+	
+	Buffer<MidiMessage>& buffer = *_midi_in_port->buffer(0);
+	_encoded_events = 0;
+
+	for (size_t i = 0; i < buffer.filled_size(); ++i) {
+		snd_midi_event_encode(_alsa_encoder, buffer.value_at(i).buffer,
+			buffer.value_at(i).size, 
+			&_alsa_events[_encoded_events]);
+		_alsa_events[_encoded_events].time.tick = buffer.value_at(i).time;
+		if (_alsa_events[_encoded_events].type != SND_SEQ_EVENT_NONE)
+			++_encoded_events;
+	}
+}
+
+
+bool
+DSSINode::has_midi_input() const
+{
+	return (_dssi_descriptor->run_synth || _dssi_descriptor->run_multiple_synths);
+}
+
+
+void
+DSSINode::run(size_t nframes)
+{
+	NodeBase::run(nframes);
+
+	if (_dssi_descriptor->run_synth) {
+		convert_events();
+		_dssi_descriptor->run_synth(_instances[0], nframes,
+					     _alsa_events, _encoded_events);
+	} else if (_dssi_descriptor->run_multiple_synths) {
+		convert_events();
+		// I hate this stupid function
+		snd_seq_event_t* events[1]       = { _alsa_events };
+		long unsigned    events_sizes[1] = { _encoded_events };
+		_dssi_descriptor->run_multiple_synths(1, _instances, nframes,
+			events, events_sizes);
+	} else {
+		LADSPANode::run(nframes);
+	}
+}
+
+
+void
+DSSINode::send_control(int port_num, float value)
+{
+	string path = _ui_base_path + "/control";
+	lo_send(_ui_addr, path.c_str(), "if", port_num, value);
+}
+
+
+void
+DSSINode::send_program(int bank, int value)
+{
+	string path = _ui_base_path + "/program";
+	lo_send(_ui_addr, path.c_str(), "ii", bank, value);
+}
+
+
+void
+DSSINode::send_configure(const string& key, const string& val)
+{
+	string path = _ui_base_path + "/configure";
+	lo_send(_ui_addr, path.c_str(), "ss", key.c_str(), val.c_str());
+}
+
+	
+void
+DSSINode::send_show()
+{
+	string path = _ui_base_path + "/show";
+	lo_send(_ui_addr, path.c_str(), NULL);
+}
+
+
+void
+DSSINode::send_hide()
+{
+	string path = _ui_base_path + "/hide";
+	lo_send(_ui_addr, path.c_str(), NULL);
+}
+
+
+void
+DSSINode::send_quit()
+{
+	string path = _ui_base_path + "/quit";
+	lo_send(_ui_addr, path.c_str(), NULL);
+}
+
+
+void
+DSSINode::send_update()
+{
+	// send "configure"s
+	for (map<string, string>::iterator i = _configures.begin(); i != _configures.end(); ++i)
+		send_configure((*i).first, (*i).second);
+
+	// send "program"
+	send_program(_bank, _program);
+
+	// send "control"s
+	for (size_t i=0; i < _ports->size(); ++i)
+		if (_ports->at(i)->type() == DataType::FLOAT && _ports->at(i)->buffer_size() == 1)
+			send_control(_ports->at(i)->num(), ((PortBase<sample>*)_ports->at(i))->buffer(0)->value_at(0));
+
+	// send "show" FIXME: not to spec
+	send_show();
+}
+
+
+bool
+DSSINode::update_programs(bool send_events)
+{
+	// remember all old banks and programs
+	set<pair<int, int> > to_be_deleted;
+	map<int, Bank>::const_iterator iter;
+	Bank::const_iterator iter2;
+	for (iter = _banks.begin(); iter != _banks.end(); ++iter) {
+	  for (iter2 = iter->second.begin(); iter2 != iter->second.end(); ++iter2) {
+	  	to_be_deleted.insert(make_pair(iter->first, iter2->first));
+	  }
+	}
+  
+	// iterate over all programs
+	if (_dssi_descriptor->get_program) {
+		for (int i = 0; true; ++i) {
+			const DSSI_Program_Descriptor* descriptor =
+			  _dssi_descriptor->get_program(_instances[0], i);
+			if (!descriptor)
+			  break;
+			
+			iter = _banks.find(descriptor->Bank);
+			if (iter == _banks.end() || 
+			    iter->second.find(descriptor->Program) == iter->second.end() ||
+			    iter->second.find(descriptor->Program)->second != descriptor->Name) {
+				_banks[descriptor->Bank][descriptor->Program] = descriptor->Name;
+				if (send_events) {
+					om->client_broadcaster()->send_program_add(path(), descriptor->Bank,
+									   descriptor->Program, 
+									   descriptor->Name);
+				}
+				to_be_deleted.erase(make_pair(descriptor->Bank, descriptor->Program));
+			}
+		}
+	}
+	
+	// remove programs that has disappeared from the plugin
+	set<pair<int, int> >::const_iterator set_iter;
+	for (set_iter = to_be_deleted.begin(); 
+	     set_iter != to_be_deleted.end(); ++set_iter) {
+		_banks[set_iter->first].erase(set_iter->second);
+		if (send_events)
+			om->client_broadcaster()->send_program_remove(path(), set_iter->first, set_iter->second);
+		if (_banks[set_iter->first].size() == 0)
+			_banks.erase(set_iter->first);
+	}
+	
+	return true;
+}
+
+
+void
+DSSINode::set_default_program()
+{
+	map<int, Bank>::const_iterator iter = _banks.begin();
+	if (iter != _banks.end()) {
+		Bank::const_iterator iter2 = iter->second.begin();
+		if (iter2 != iter->second.end())
+			program(iter->first, iter2->first);
+	}
+}
+
+
+const map<int, DSSINode::Bank>&
+DSSINode::get_programs() const
+{
+	return _banks;
+}
+
+
+/*
+void
+DSSINode::send_creation_messages(ClientInterface* client) const
+{
+	LADSPANode::send_creation_messages(client);
+	
+	for (map<int, Bank>::const_iterator i = get_programs().begin();
+			i != get_programs().end(); ++i) {
+		
+		for (Bank::const_iterator j = i->second.begin(); j != i->second.end(); ++j)
+		  client->program_add(path(), 
+			i->first, j->first, j->second);
+	}
+}
+*/
+
+} // namespace Om