Remove JACK dependence from RAUL.

git-svn-id: http://svn.drobilla.net/lad/trunk/machina@1596 a436a847-0d15-0410-975c-d299462d15a1

2 files changed, 368 insertions, 0 deletions

diff --git a/src/engine/RaulJackDriver.cpp b/src/engine/RaulJackDriver.cpp
new file mode 100644
index 0000000..b6bbd27
--- /dev/null
+++ b/src/engine/RaulJackDriver.cpp
@@ -0,0 +1,248 @@
+/* This file is part of Raul.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Raul 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.
+ * 
+ * Raul 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 <cassert>
+#include <cstring>
+#include <string>
+#include <iostream>
+#include <jack/jack.h>
+#include <jack/statistics.h>
+#include <jack/thread.h>
+#include <raul/JackDriver.hpp>
+
+using std::cerr; using std::endl;
+using std::string;
+
+namespace Raul {
+
+
+JackDriver::JackDriver()
+: _client(NULL)
+, _is_activated(false)
+, _xruns(0)
+, _xrun_delay(0)
+{
+	_last_pos.frame = 0;
+	_last_pos.valid = (jack_position_bits_t)0;
+}
+
+
+JackDriver::~JackDriver() 
+{
+	detach();
+}
+
+
+/** Connect to Jack.
+ */
+void
+JackDriver::attach(const string& client_name, string server_name) 
+{
+	// Already connected
+	if (_client)
+		return;
+	
+	jack_set_error_function(error_cb);
+
+	if (server_name.length() > 0)
+		_client = jack_client_open(client_name.c_str(), JackServerName, NULL,
+			server_name.c_str(), NULL);
+	else
+		_client = jack_client_open(client_name.c_str(), JackNullOption, NULL, NULL);
+
+	if (_client == NULL) {
+		//_app->status_message("[JACK] Unable to create client");
+		_is_activated = false;
+	} else {
+		jack_set_error_function(error_cb);
+		jack_on_shutdown(_client, jack_shutdown_cb, this);
+		jack_set_port_registration_callback(_client, jack_port_registration_cb, this);
+		jack_set_graph_order_callback(_client, jack_graph_order_cb, this);
+		jack_set_buffer_size_callback(_client, jack_buffer_size_cb, this);
+		jack_set_xrun_callback(_client, jack_xrun_cb, this);
+		jack_set_process_callback(_client, jack_process_cb, this);
+	
+		//_is_dirty = true;
+		_buffer_size = jack_get_buffer_size(_client);
+		}
+}
+
+
+void
+JackDriver::detach() 
+{
+	if (_client) {
+		deactivate();
+		jack_client_close(_client);
+		_client = NULL;
+		_is_activated = false;
+		//signal_detached.emit();
+	}
+}
+
+
+void
+JackDriver::activate()
+{
+	if (!jack_activate(_client)) {
+		_is_activated = true;
+		//signal_attached.emit();
+		//_app->status_message("[JACK] Attached");
+	} else {
+		//_app->status_message("[JACK] ERROR: Failed to attach");
+		_is_activated = false;
+	}
+}
+
+
+void
+JackDriver::deactivate()
+{
+	if (_client)
+		jack_deactivate(_client);
+
+	_is_activated = false;
+}
+
+
+void
+JackDriver::jack_port_registration_cb(jack_port_id_t /*port_id*/, int /*registered*/, void* /*jack_driver*/) 
+{
+	/* whatever. */
+}
+
+
+int
+JackDriver::jack_graph_order_cb(void* jack_driver) 
+{
+	JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+	
+	assert(me);
+	me->on_graph_order_changed();
+
+	return 0;
+}
+
+
+int
+JackDriver::jack_xrun_cb(void* jack_driver)
+{
+	JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+	
+	assert(me);
+
+	me->_xruns++;
+	me->_xrun_delay = jack_get_xrun_delayed_usecs(me->_client);
+	me->reset_delay();
+
+	me->on_xrun();
+	
+	return 0;
+}
+
+
+int
+JackDriver::jack_buffer_size_cb(jack_nframes_t buffer_size, void* jack_driver) 
+{
+	JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+	
+	assert(me);
+	me->reset_xruns();
+	me->reset_delay();
+	me->on_buffer_size_changed(buffer_size);
+	me->_buffer_size = buffer_size;
+
+	return 0;
+}
+
+	
+int
+JackDriver::jack_process_cb(jack_nframes_t nframes, void* jack_driver)
+{
+	JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+	
+	assert(me);
+
+	me->on_process(nframes);
+	
+	return 0;
+}
+
+
+void
+JackDriver::jack_shutdown_cb(void* jack_driver)
+{
+	JackDriver* me = reinterpret_cast<JackDriver*>(jack_driver);
+	assert(me);
+
+	me->reset_delay();
+	me->reset_xruns();
+
+	me->on_shutdown();
+
+	me->_client = NULL;
+}
+
+
+void
+JackDriver::error_cb(const char* msg)
+{
+	cerr << "JACK ERROR: " << msg << endl;
+}
+
+
+jack_nframes_t
+JackDriver::buffer_size()
+{
+	if (_is_activated)
+		return _buffer_size;
+	else
+		return jack_get_buffer_size(_client);
+}
+
+
+void
+JackDriver::reset_xruns()
+{
+	_xruns = 0;
+	_xrun_delay = 0;
+}
+
+
+bool
+JackDriver::set_buffer_size(jack_nframes_t size)
+{
+	if (buffer_size() == size) {
+		return true;
+	}
+
+	if (!_client) {
+		_buffer_size = size;
+		return true;
+	}
+	
+	if (jack_set_buffer_size(_client, size)) {
+		//_app->status_message("[JACK] ERROR: Unable to set buffer size");
+		return false;
+	} else {
+		return true;
+	}
+}
+
+
+} // namespace Raul
+
diff --git a/src/engine/RaulJackDriver.hpp b/src/engine/RaulJackDriver.hpp
new file mode 100644
index 0000000..f1b92f1
--- /dev/null
+++ b/src/engine/RaulJackDriver.hpp
@@ -0,0 +1,120 @@
+/* This file is part of Raul.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Raul 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.
+ * 
+ * Raul 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
+ */
+
+#ifndef RAUL_JACK_DRIVER_HPP
+#define RAUL_JACK_DRIVER_HPP
+
+#include <iostream>
+#include <string>
+#include <jack/jack.h>
+#include <jack/statistics.h>
+
+namespace Raul {
+
+
+/** Jack based driver for an audio context.
+ *
+ * Apps can override the  on_* methods of this class to implement reactions
+ * to Jack events (e.g. new port, process callback, etc).
+ */
+class JackDriver
+{
+public:
+	JackDriver();
+	virtual ~JackDriver();
+	
+	void attach(const std::string& client_name, std::string server_name="");
+	void detach();
+
+	void activate();
+	void deactivate();
+
+	bool is_activated() const { return _is_activated; }
+	bool is_attached()  const { return (_client != NULL); }
+	bool is_realtime()  const { return _client && jack_is_realtime(_client); }
+	
+	void start_transport() { jack_transport_start(_client); }
+	void stop_transport()  { jack_transport_stop(_client); }
+	
+	void rewind_transport() {
+		jack_position_t zero;
+		zero.frame = 0;
+		zero.valid = (jack_position_bits_t)0;
+		jack_transport_reposition(_client, &zero);
+	}
+	
+	jack_nframes_t buffer_size();
+	bool           set_buffer_size(jack_nframes_t size);
+
+	inline jack_nframes_t sample_rate() { return jack_get_sample_rate(_client); }
+
+	inline size_t xruns() { return _xruns; }
+	void          reset_xruns();
+
+	inline float max_delay()   { return jack_get_max_delayed_usecs(_client); }
+	inline void  reset_delay() { jack_reset_max_delayed_usecs(_client); }
+
+	jack_client_t* jack_client() { return _client; }
+
+
+protected:
+	/** Process callback.  Derived classes should do all audio processing here. */
+	virtual void on_process(jack_nframes_t /*nframes*/) {}
+
+	/** Graph order change callback. */
+	virtual void on_graph_order_changed() {}
+
+	/** Buffer size changed callback.
+	 * At the time this is called, buffer_size() will still return the old
+	 * size.  Immediately afterwards, it will be set to the new value.
+	 */
+	virtual void on_buffer_size_changed(jack_nframes_t /*size*/) {}
+
+	virtual void on_xrun()     {}
+	virtual void on_shutdown() {}
+	virtual void on_error()    {}
+
+protected:
+	jack_client_t* _client;
+
+private:
+
+	static void error_cb(const char* msg);
+
+	void destroy_all_ports();
+
+	void update_time();
+
+	static void jack_port_registration_cb(jack_port_id_t port_id, int registered, void* me);
+	static int  jack_graph_order_cb(void* me);
+	static int  jack_xrun_cb(void* me);
+	static int  jack_buffer_size_cb(jack_nframes_t buffer_size, void* me);
+	static int  jack_process_cb(jack_nframes_t nframes, void* me);
+
+	static void jack_shutdown_cb(void* me);
+
+	bool            _is_activated;
+	jack_position_t _last_pos;
+	jack_nframes_t  _buffer_size;
+	size_t          _xruns;
+	float           _xrun_delay;
+};
+
+
+} // namespace Raul
+
+#endif // RAUL_JACK_DRIVER_HPP