1 files changed, 267 insertions, 0 deletions
diff --git a/src/engine/JackMidiDriver.cpp b/src/engine/JackMidiDriver.cpp
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+++ b/src/engine/JackMidiDriver.cpp
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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+() */
+
+#include <iostream>
+#include <cstdlib>
+#include <pthread.h>
+#include <raul/Maid.hpp>
+#include <raul/midi_events.h>
+#include "types.hpp"
+#include "JackMidiDriver.hpp"
+#include "JackAudioDriver.hpp"
+#include "ThreadManager.hpp"
+#include "AudioDriver.hpp"
+#include "EventBuffer.hpp"
+#include "DuplexPort.hpp"
+#include "ProcessContext.hpp"
+#include "jack_compat.h"
+using namespace std;
+
+namespace Ingen {
+
+	
+//// JackMidiPort ////
+
+JackMidiPort::JackMidiPort(JackMidiDriver* driver, DuplexPort* patch_port)
+	: DriverPort(patch_port)
+	, Raul::List<JackMidiPort*>::Node(this)
+	, _driver(driver)
+	, _jack_port(NULL)
+{
+	assert(patch_port->poly() == 1);
+
+	_jack_port = jack_port_register(_driver->jack_client(),
+		patch_port->path().c_str(), JACK_DEFAULT_MIDI_TYPE,
+		(patch_port->is_input()) ? JackPortIsInput : JackPortIsOutput,
+		0);
+	
+	if (_jack_port == NULL) {
+		cerr << "[JackMidiPort] ERROR: Failed to register port " << patch_port->path() << endl;
+		throw JackAudioDriver::PortRegistrationFailedException();
+	}
+
+	patch_port->buffer(0)->clear();
+}
+
+
+JackMidiPort::~JackMidiPort()
+{
+	jack_port_unregister(_driver->jack_client(), _jack_port);
+}
+
+
+/** Prepare input for a block before a cycle is run, in the audio thread.
+ *
+ * This is simple since Jack MIDI is in-band with audio.
+ */
+void
+JackMidiPort::pre_process(ProcessContext& context)
+{
+	if ( ! is_input() )
+		return;
+	
+	assert(_patch_port->poly() == 1);
+
+	EventBuffer* patch_buf = dynamic_cast<EventBuffer*>(_patch_port->buffer(0));
+	assert(patch_buf);
+
+	void*                jack_buffer = jack_port_get_buffer(_jack_port, context.nframes());
+	const jack_nframes_t event_count = jack_midi_get_event_count(jack_buffer);
+
+	patch_buf->prepare_write(context.start(), context.nframes());
+	
+	// Copy events from Jack port buffer into patch port buffer
+	for (jack_nframes_t i=0; i < event_count; ++i) {
+		jack_midi_event_t ev;
+		jack_midi_event_get(&ev, jack_buffer, i);
+
+		// FIXME: type is hardcoded for now, we should get it from
+		// the type map instead
+		const bool success = patch_buf->append(ev.time, 0, 1, ev.size, ev.buffer);
+		if (!success)
+			cerr << "WARNING: Failed to write MIDI to port buffer, event(s) lost!" << endl;
+	}
+
+	//if (event_count)
+	//	cerr << "Jack MIDI got " << event_count << " events." << endl;
+}
+
+
+/** Prepare output for a block after a cycle is run, in the audio thread.
+ *
+ * This is simple since Jack MIDI is in-band with audio.
+ */
+void
+JackMidiPort::post_process(ProcessContext& context)
+{
+	if (is_input())
+		return;
+
+	EventBuffer* patch_buf = dynamic_cast<EventBuffer*>(_patch_port->buffer(0));
+	void*        jack_buf  = jack_port_get_buffer(_jack_port, context.nframes());
+	
+	assert(_patch_port->poly() == 1);
+	assert(patch_buf);
+
+	patch_buf->prepare_read(context.start(), context.nframes());
+	jack_midi_clear_buffer(jack_buf);
+	
+	uint32_t frames = 0;
+	uint32_t subframes = 0;
+	uint16_t type = 0;
+	uint16_t size = 0;
+	uint8_t* data = NULL;
+
+	// Copy events from Jack port buffer into patch port buffer
+	for (patch_buf->rewind(); patch_buf->is_valid(); patch_buf->increment()) {
+		patch_buf->get_event(&frames, &subframes, &type, &size, &data);
+		jack_midi_event_write(jack_buf, frames, data, size);
+	}
+
+	//if (event_count)
+	//	cerr << "Jack MIDI wrote " << event_count << " events." << endl;
+}
+
+
+
+//// JackMidiDriver ////
+
+
+bool JackMidiDriver::_midi_thread_exit_flag = true;
+
+
+JackMidiDriver::JackMidiDriver(jack_client_t* client)
+	: _client(client)
+	, _is_activated(false)
+	, _is_enabled(false)
+{
+}
+
+
+JackMidiDriver::~JackMidiDriver()
+{
+	deactivate();
+}
+
+
+/** Launch and start the MIDI thread.
+ */
+void
+JackMidiDriver::activate() 
+{
+	_is_activated = true;
+}
+
+
+/** Terminate the MIDI thread.
+ */
+void
+JackMidiDriver::deactivate() 
+{
+	_is_activated = false;
+}
+
+
+/** Build flat arrays of events to be used as input for the given cycle.
+ */
+void
+JackMidiDriver::pre_process(ProcessContext& context)
+{
+	for (Raul::List<JackMidiPort*>::iterator i = _in_ports.begin(); i != _in_ports.end(); ++i)
+		(*i)->pre_process(context);
+}
+
+
+/** Write the output from any (top-level, exported) MIDI output ports to Jack ports.
+ */
+void
+JackMidiDriver::post_process(ProcessContext& context)
+{
+	for (Raul::List<JackMidiPort*>::iterator i = _out_ports.begin(); i != _out_ports.end(); ++i)
+		(*i)->post_process(context);
+}
+
+
+/** Add an Jack MIDI port.
+ *
+ * Realtime safe, this is to be called at the beginning of a process cycle to
+ * insert (and actually begin using) a new port.
+ * 
+ * See new_port() and remove_port().
+ */
+void
+JackMidiDriver::add_port(DriverPort* port)
+{
+	assert(ThreadManager::current_thread_id() == THREAD_PROCESS);
+	assert(dynamic_cast<JackMidiPort*>(port));
+
+	if (port->is_input())
+		_in_ports.push_back((JackMidiPort*)port);
+	else
+		_out_ports.push_back((JackMidiPort*)port);
+}
+
+
+/** Remove an Jack MIDI port.
+ *
+ * Realtime safe.  This is to be called at the beginning of a process cycle to
+ * remove the port from the lists read by the audio thread, so the port
+ * will no longer be used and can be removed afterwards.
+ *
+ * It is the callers responsibility to delete the returned port.
+ */
+DriverPort*
+JackMidiDriver::remove_port(const Path& path)
+{
+	assert(ThreadManager::current_thread_id() == THREAD_PROCESS);
+
+	// FIXME: duplex?
+
+	for (Raul::List<JackMidiPort*>::iterator i = _in_ports.begin(); i != _in_ports.end(); ++i)
+		if ((*i)->patch_port()->path() == path)
+			return _in_ports.erase(i)->elem(); // FIXME: LEAK
+
+	for (Raul::List<JackMidiPort*>::iterator i = _out_ports.begin(); i != _out_ports.end(); ++i)
+		if ((*i)->patch_port()->path() == path)
+			return _out_ports.erase(i)->elem(); // FIXME: LEAK
+
+	cerr << "[JackMidiDriver::remove_input] WARNING: Unable to find Jack port " << path << endl;
+	return NULL;
+}
+
+	
+DriverPort*
+JackMidiDriver::driver_port(const Path& path)
+{
+	assert(ThreadManager::current_thread_id() == THREAD_PROCESS);
+
+	// FIXME: duplex?
+
+	for (Raul::List<JackMidiPort*>::iterator i = _in_ports.begin(); i != _in_ports.end(); ++i)
+		if ((*i)->patch_port()->path() == path)
+			return (*i);
+
+	for (Raul::List<JackMidiPort*>::iterator i = _out_ports.begin(); i != _out_ports.end(); ++i)
+		if ((*i)->patch_port()->path() == path)
+			return (*i);
+
+	return NULL;
+}
+
+
+} // namespace Ingen
+