/*
    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>

    This program 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.

    This program 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 more 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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <libcxml/cxml.h>
#include "audio_content.h"
#include "analyse_audio_job.h"
#include "job_manager.h"
#include "film.h"
#include "exceptions.h"
#include "config.h"

#include "i18n.h"

using std::string;
using std::vector;
using boost::shared_ptr;
using boost::lexical_cast;
using boost::dynamic_pointer_cast;

int const AudioContentProperty::AUDIO_CHANNELS = 200;
int const AudioContentProperty::AUDIO_LENGTH = 201;
int const AudioContentProperty::AUDIO_FRAME_RATE = 202;
int const AudioContentProperty::AUDIO_GAIN = 203;
int const AudioContentProperty::AUDIO_DELAY = 204;
int const AudioContentProperty::AUDIO_MAPPING = 205;

AudioContent::AudioContent (shared_ptr<const Film> f, Time s)
	: Content (f, s)
	, _audio_gain (0)
	, _audio_delay (Config::instance()->default_audio_delay ())
{

}

AudioContent::AudioContent (shared_ptr<const Film> f, boost::filesystem::path p)
	: Content (f, p)
	, _audio_gain (0)
	, _audio_delay (Config::instance()->default_audio_delay ())
{

}

AudioContent::AudioContent (shared_ptr<const Film> f, shared_ptr<const cxml::Node> node)
	: Content (f, node)
{
	LocaleGuard lg;
	
	_audio_gain = node->number_child<float> ("AudioGain");
	_audio_delay = node->number_child<int> ("AudioDelay");
}

AudioContent::AudioContent (shared_ptr<const Film> f, vector<shared_ptr<Content> > c)
	: Content (f, c)
{
	shared_ptr<AudioContent> ref = dynamic_pointer_cast<AudioContent> (c[0]);
	assert (ref);
	
	for (size_t i = 0; i < c.size(); ++i) {
		shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (c[i]);

		if (ac->audio_gain() != ref->audio_gain()) {
			throw JoinError (_("Content to be joined must have the same audio gain."));
		}

		if (ac->audio_delay() != ref->audio_delay()) {
			throw JoinError (_("Content to be joined must have the same audio delay."));
		}
	}

	_audio_gain = ref->audio_gain ();
	_audio_delay = ref->audio_delay ();
}

void
AudioContent::as_xml (xmlpp::Node* node) const
{
	LocaleGuard lg;
	
	boost::mutex::scoped_lock lm (_mutex);
	node->add_child("AudioGain")->add_child_text (lexical_cast<string> (_audio_gain));
	node->add_child("AudioDelay")->add_child_text (lexical_cast<string> (_audio_delay));
}


void
AudioContent::set_audio_gain (float g)
{
	{
		boost::mutex::scoped_lock lm (_mutex);
		_audio_gain = g;
	}
	
	signal_changed (AudioContentProperty::AUDIO_GAIN);
}

void
AudioContent::set_audio_delay (int d)
{
	{
		boost::mutex::scoped_lock lm (_mutex);
		_audio_delay = d;
	}
	
	signal_changed (AudioContentProperty::AUDIO_DELAY);
}

boost::signals2::connection
AudioContent::analyse_audio (boost::function<void()> finished)
{
	shared_ptr<const Film> film = _film.lock ();
	assert (film);
	
	shared_ptr<AnalyseAudioJob> job (new AnalyseAudioJob (film, dynamic_pointer_cast<AudioContent> (shared_from_this())));
	boost::signals2::connection c = job->Finished.connect (finished);
	JobManager::instance()->add (job);

	return c;
}

boost::filesystem::path
AudioContent::audio_analysis_path () const
{
	shared_ptr<const Film> film = _film.lock ();
	if (!film) {
		return boost::filesystem::path ();
	}

	return film->audio_analysis_path (dynamic_pointer_cast<const AudioContent> (shared_from_this ()));
}

string
AudioContent::technical_summary () const
{
	return String::compose ("audio: channels %1, length %2, raw rate %3, out rate %4", audio_channels(), audio_length(), content_audio_frame_rate(), output_audio_frame_rate());
}