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/**
* @class dash::mpd::ISubset
* @brief This interface is needed for accessing the attributes of the <tt><b>Subset</b></tt> element as specified in <em>ISO/IEC 23009-1, Part 1, 2012</em>, section 5.3.8.2, table 10
* @details Subsets are described by the <tt><b>Subset</b></tt> element contained in the <tt><b>Period</b></tt> element. \n
* Subsets provide a mechanism to restrict the combination of active Adaptation Sets where an active Adaptation Set is one
* for which the DASH client is presenting at least one of the contained Representations.\n
* A Subset defines a set of one or more Adaptation Sets. The presence of a <tt><b>Subset</b></tt> element within a <tt><b>Period</b></tt> element expresses
* the intention of the creator of the Media Presentation that a client should act as follows:
* At any time, the set of active Adaptation Sets shall be a subset of the Adaptation Sets of one of the specified Subsets.
* Any Adaptation Set not explicitly contained in any Subset element is implicitly contained in all specified Subsets.\n
* This implies that
* <ul>
* <li>Empty Subsets are not allowed.
* <li>No Subset should contain all the Adaptation Sets.
* </ul>
* Each Adaptation Set for which the value of the \c \@id is provided in the \c \@contains attribute is contained in this Subset.
* @see dash::mpd::IMPDElement
*
* @author bitmovin Softwareentwicklung OG \n
* Email: libdash-dev@vicky.bitmovin.net
* @version 2.1
* @date 2013
* @copyright bitmovin Softwareentwicklung OG, All Rights Reserved \n\n
* This source code and its use and distribution, is subject to the terms
* and conditions of the applicable license agreement.
*/
#ifndef ISUBSET_H_
#define ISUBSET_H_
#include "config.h"
#include "IMPDElement.h"
namespace dash
{
namespace mpd
{
class ISubset : public virtual IMPDElement
{
public:
virtual ~ISubset(){}
/**
* Returns a reference to a vector of unsigned integers specifying the Adaptation Sets contained in a Subset by providing
* the \c \@id values of the contained Adaptation Sets.
* @return a reference to a vector of unsigned integers
*/
virtual const std::vector<uint32_t>& Contains () const = 0;
};
}
}
#endif /* ISUBSET_H_ */
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