/* 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 <cassert>
#include <iostream>
#include <pthread.h>
#include "raul/SRSWQueue.hpp"
#include "events/SendPortValueEvent.hpp"
#include "Event.hpp"
#include "PostProcessor.hpp"
#include "Engine.hpp"
#include "AudioDriver.hpp"
#include "ProcessContext.hpp"

using namespace std;

namespace Ingen {


PostProcessor::PostProcessor(Engine& engine, size_t queue_size)
    : _engine(engine)
	, _max_time(0)
	, _events(queue_size)
	, _event_buffer_size(sizeof(SendPortValueEvent)) // FIXME: make generic
	, _event_buffer((uint8_t*)malloc(_event_buffer_size))
{
}


void
PostProcessor::process()
{
	const FrameTime end_time = _max_time.get();

	/* FIXME: The order here is a bit tricky: if the normal events are
	 * processed first, then a deleted port may still have a pending
	 * broadcast event which will segfault if executed afterwards.
	 * If it's the other way around, broadcasts will be sent for
	 * ports the client doesn't even know about yet... */
	
	/* FIXME: process events from all threads if parallel */

	/* Process audio thread generated events */
	while (true) {
		AudioDriver* driver = _engine.audio_driver();
		if (driver && driver->context().event_sink().read(_event_buffer_size, _event_buffer)) {
			if (((Event*)_event_buffer)->time() > end_time) {
				cerr << "WARNING: Lost event with time "
					<< ((Event*)_event_buffer)->time() << " > " << end_time << endl;
				break;
			}
			((Event*)_event_buffer)->post_process();
		} else {
			break;
		}
	}

	/* Process normal events */
	Raul::List<Event*>::Node* n = _events.head();
	while (n) {
		if (n->elem()->time() > end_time)
			break;
		Raul::List<Event*>::Node* next = n->next();
		n->elem()->post_process();
		_events.erase(_events.begin());
		delete n->elem();
		delete n;
		n = next;
	}
}


} // namespace Ingen