зеркало из https://github.com/mozilla/gecko-dev.git
91 строка
3.0 KiB
C
91 строка
3.0 KiB
C
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/* -*- 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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* MPD.h
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*****************************************************************************
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* Copyright(C) 2010 - 2011 Klagenfurt University
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*
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* Created on: Aug 10, 2010
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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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* |MPD| - Media Presentation Description
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*
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* Describes the media presentation. Top of the hierarchy in an MPD file.
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* Contains one or a series of contiguous |Period|s, which contain 1+ available
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* pieces of media, available during that time period, e.g. audio in various
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* languages, a video component.
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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 MPD_H_
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#define MPD_H_
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#include "nsTArray.h"
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#include "nsString.h"
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#include "Period.h"
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namespace mozilla {
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namespace net {
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class MPD
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{
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public:
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MPD()
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{
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MOZ_COUNT_CTOR(MPD);
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}
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virtual ~MPD() {
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MOZ_COUNT_DTOR(MPD);
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}
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// At least one media content |Period|s per Media Presentation. The |MPD|
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// contains 1+ available pieces of media, available during that time period
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// e.g. audio in various languages, a video component.
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// |MPD| takes ownership of |Period| in |AddPeriod| and will manage deletion.
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void AddPeriod(Period* aPeriod);
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Period const * GetPeriod(uint32_t aIndex) const;
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uint32_t const GetNumPeriods() const;
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// Adds/Gets an absolute/relative |BaseURL| for the whole document.
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// Note: A relative |BaseURL| for the whole document will use the URL for the
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// MPD file itself as base.
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void AddBaseUrl(nsAString const& aUrl);
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nsAString const& GetBaseUrl(uint32_t aIndex) const;
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bool HasBaseUrls() { return !mBaseUrls.IsEmpty(); }
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private:
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// List of media content |Period|s in this media presentation.
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nsTArray<nsAutoPtr<Period> > mPeriods;
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// List of |BaseURL|s which can be used to access the media.
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nsTArray<nsString> mBaseUrls;
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};
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}//namespace net
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}//namespace mozilla
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#endif /* MPD_H_ */
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