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