/*
 * Copyright (c) 2012 Yoann Blein
 * Licensed under the simplified BSD license.
 * See Documentation/Licenses/BSD-simplified.txt for more information.
 */

#include "RTPPayloadTypeParser.h"

#include <boost/optional.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/numeric/conversion/cast.hpp>

namespace Swift {

RTPPayloadTypeParser::RTPPayloadTypeParser() : level(0) {

}

void RTPPayloadTypeParser::handleStartElement(const std::string& element, const std::string&, const AttributeMap& attributes) {
	if (level == 0) {
		// channels
		try {
			getPayloadInternal()->setChannels(boost::lexical_cast<boost::uint32_t>(attributes.getAttributeValue("channels").get_value_or("1")));
		} catch (boost::bad_lexical_cast &) {
			getPayloadInternal()->setChannels(1);
		}
		// clockrate
		try {
			getPayloadInternal()->setClockrate(boost::lexical_cast<boost::uint32_t>(attributes.getAttributeValue("clockrate").get_value_or("0")));
		} catch (boost::bad_lexical_cast &) {
			getPayloadInternal()->setClockrate(0);
		}
		// ID
		try {
			getPayloadInternal()->setID(boost::numeric_cast<boost::uint8_t>(boost::lexical_cast<int>(attributes.getAttributeValue("id").get_value_or("0"))));
		} catch (boost::bad_lexical_cast &) {
			getPayloadInternal()->setID(151);
		}
		// maxptime
		try {
			getPayloadInternal()->setMaxptime(boost::lexical_cast<boost::uint32_t>(attributes.getAttributeValue("maxptime").get_value_or("0")));
		} catch (boost::bad_lexical_cast &) {
			getPayloadInternal()->setMaxptime(0);
		}
		// name
		getPayloadInternal()->setName(attributes.getAttributeValue("name").get_value_or(""));
		// ptime
		try {
			getPayloadInternal()->setPTime(boost::lexical_cast<boost::uint32_t>(attributes.getAttributeValue("ptime").get_value_or("0")));
		} catch (boost::bad_lexical_cast &) {
			getPayloadInternal()->setPTime(0);
		}
	} else if (level == 1 && element == "parameter") {
		getPayloadInternal()->addParameter(attributes.getAttributeValue("name").get_value_or(""),
				attributes.getAttributeValue("value").get_value_or(""));
	}
	++level;
}

void RTPPayloadTypeParser::handleEndElement(const std::string&, const std::string&) {
	--level;
}

}