/* This file is part of Patchage.
 * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
 * 
 * Patchage 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.
 * 
 * Patchage 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 JACKDRIVER_H
#define JACKDRIVER_H

#include <iostream>
#include <string>
#include <boost/shared_ptr.hpp>
#include <jack/jack.h>
#include <jack/statistics.h>
#include <raul/SRSWQueue.h>
#include <raul/Mutex.h>
#include <raul/AtomicPtr.h>
#include "Driver.h"
class Patchage;
class PatchageEvent;
class PatchageFlowCanvas;
class PatchagePort;
class PatchageModule;

using std::string;


/** Handles all externally driven functionality, registering ports etc.
 *
 * Jack callbacks and connect methods and things like that live here.
 * Right now just for jack ports, but that will change...
 */
class JackDriver : public Driver
{
public:
	JackDriver(Patchage* app);
	~JackDriver();
	
	void attach(bool launch_daemon);
	void detach();

	bool is_attached() const { return (_client != NULL); }
	bool is_realtime() const { return _client && jack_is_realtime(_client); }
	
	Raul::SRSWQueue<PatchageEvent>& events() { return _events; }

	void refresh();

	bool connect(boost::shared_ptr<PatchagePort> src,
	             boost::shared_ptr<PatchagePort> dst);

	bool disconnect(boost::shared_ptr<PatchagePort> src,
	                boost::shared_ptr<PatchagePort> dst);

	void start_transport() { jack_transport_start(_client); }
	void stop_transport()  { jack_transport_stop(_client); }
	
	void reset_xruns();
	void reset_delay() { jack_reset_max_delayed_usecs(_client); }

	void rewind_transport() {
		jack_position_t zero;
		zero.frame = 0;
		zero.valid = (jack_position_bits_t)0;
		jack_transport_reposition(_client, &zero);
	}
	
	jack_client_t* client() { return _client; }
	
	jack_nframes_t buffer_size();
	bool           set_buffer_size(jack_nframes_t size);

	inline float sample_rate() { return jack_get_sample_rate(_client); }

	inline size_t xruns() { return _xruns; }

	inline float max_delay() { return jack_get_max_delayed_usecs(_client); }

	boost::shared_ptr<PatchagePort> create_port(boost::shared_ptr<PatchageModule> parent,
		jack_port_t* port);

private:

	static void error_cb(const char* msg);

	void destroy_all_ports();
	void shutdown();

	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_buffer_size_cb(jack_nframes_t buffer_size, void* me);
	static int  jack_xrun_cb(void* me);
	static void jack_shutdown_cb(void* me);

	Patchage*      _app;
	jack_client_t* _client;

	Raul::SRSWQueue<PatchageEvent> _events;

	Raul::Mutex _mutex;
	
	bool            _is_activated;
	jack_position_t _last_pos;
	jack_nframes_t  _buffer_size;
	size_t          _xruns;
	float           _xrun_delay;
};


#endif // JACKDRIVER_H