gecko-dev/netwerk/dash/mpd/AdaptationSet.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/*
* AdaptationSet.h
*****************************************************************************
* Copyright(C) 2010 - 2012 Klagenfurt University
*
* Created on: Jan 27, 2012
* Authors: Christopher Mueller <christopher.mueller@itec.uni-klu.ac.at>
* Christian Timmerer <christian.timmerer@itec.uni-klu.ac.at>
* Contributors:
* Steve Workman <sworkman@mozilla.com>
*
* This Source Code Form Is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/.
*****************************************************************************/
/* DASH - Dynamic Adaptive Streaming over HTTP
*
* DASH is an adaptive bitrate streaming technology where a multimedia file is
* partitioned into one or more segments and delivered to a client using HTTP.
*
* |AdaptationSet|
*
* Describes a type of media in a |Period| of time in the media presentation,
* e.g. an audio or video stream. Direct child of |Period|, which contains 1+
* available pieces of media, available during that time period.
* |AdaptationSet| itself contains one or more |Representations| which describe
* different versions of the media, most commonly different bitrate encodings.
*
* Common class used by all DASH Profiles.
* Populated by implementation of MPD Parser.
* Used as data source by implementation of MPD Manager.
*
* |MPD|
* --> |Period|s of time.
* --> |AdaptationSet|s for each type or group of media content.
* --> |Representation|s of media, encoded with different bitrates.
* --> |Segment|s of media, identified by URL (+optional byte
* range.
*/
#ifndef ADAPTATIONSET_H_
#define ADAPTATIONSET_H_
#include "nsAutoPtr.h"
#include "nsString.h"
#include "nsTArray.h"
#include "Representation.h"
namespace mozilla {
namespace net {
class AdaptationSet
{
public:
AdaptationSet() :
mWidth(0),
mHeight(0),
mIsBitstreamSwitching(false)
{
MOZ_COUNT_CTOR(AdaptationSet);
}
virtual ~AdaptationSet() {
MOZ_COUNT_DTOR(AdaptationSet);
}
// Setters and getters for @width, @height and @mimetype.
int32_t GetWidth() const;
void SetWidth(int32_t const aWidth);
int32_t GetHeight() const;
void SetHeight(int32_t const aHeight);
void GetMIMEType(nsAString& aMIMEType) const;
void SetMIMEType(nsAString const &aMIMEType);
// Gets a list of media |Representation| objects for this |AdaptationSet|.
Representation const * GetRepresentation(uint32_t) const;
// Adds a media |Representation| to this |AdaptationSet|. Takes ownership to
// manage deletion.
void AddRepresentation(Representation* aRep);
// Returns the number of media |Representations|.
uint16_t GetNumRepresentations() const;
// En/Dis-ables switching between media |Representation|s.
void EnableBitstreamSwitching(bool const aEnable);
bool IsBitstreamSwitchingEnabled() const;
private:
// Array of media |Representations| to switch between.
nsTArray<nsAutoPtr<Representation> > mRepresentations;
// @width, height and @mimetype of this media stream.
int32_t mWidth;
int32_t mHeight;
nsString mMIMEType;
// If true, switching between media |Representation|s is allowed.
bool mIsBitstreamSwitching;
};
}
}
#endif /* ADAPTATIONSET_H_ */