97 lines
3.5 KiB
C++
97 lines
3.5 KiB
C++
// Copyright 2014 Google LLC. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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//
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// Funtions used by MpdBuilder class to generate an MPD file.
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#ifndef MPD_BASE_MPD_UTILS_H_
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#define MPD_BASE_MPD_UTILS_H_
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#include <libxml/tree.h>
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#include <list>
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#include <string>
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namespace shaka {
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class AdaptationSet;
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class MediaInfo;
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class Representation;
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struct ContentProtectionElement;
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struct SegmentInfo;
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const char kEncryptedMp4Scheme[] = "urn:mpeg:dash:mp4protection:2011";
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const char kPsshElementName[] = "cenc:pssh";
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const char kMsproElementName[] = "mspr:pro";
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const uint32_t kTransferFunctionPQ = 16;
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bool HasVODOnlyFields(const MediaInfo& media_info);
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bool HasLiveOnlyFields(const MediaInfo& media_info);
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// If |content_protection_element| has 'value' or 'schemeIdUri' set but it's
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// also in the map, then this removes them from the map.
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// |content_protection_element| cannot be NULL.
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void RemoveDuplicateAttributes(
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ContentProtectionElement* content_protection_element);
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// Returns a language in ISO-639 shortest form. May be blank for video.
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std::string GetLanguage(const MediaInfo& media_info);
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// Returns a 'codecs' string that has all the video and audio codecs joined with
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// comma.
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std::string GetCodecs(const MediaInfo& media_info);
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// Returns a codec string without variants. For example, "mp4a" instead of
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// "mp4a.40.2". May return a format for text streams.
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std::string GetBaseCodec(const MediaInfo& media_info);
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// Returns a key made from the characteristics that separate AdaptationSets.
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std::string GetAdaptationSetKey(const MediaInfo& media_info, bool ignore_codec);
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std::string FloatToXmlString(double number);
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std::string SecondsToXmlDuration(double seconds);
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// Tries to get "duration" attribute from |node|. On success |duration| is set.
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bool GetDurationAttribute(xmlNodePtr node, float* duration);
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bool MoreThanOneTrue(bool b1, bool b2, bool b3);
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bool AtLeastOneTrue(bool b1, bool b2, bool b3);
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bool OnlyOneTrue(bool b1, bool b2, bool b3);
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/// Converts hex data to UUID format. Hex data must be size 16.
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/// @param data input hex data.
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/// @param uuid_format is the UUID format of the input.
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bool HexToUUID(const std::string& data, std::string* uuid_format);
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// Update the <cenc:pssh> element for |drm_uuid| ContentProtection element.
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// If the element does not exist, this will add one.
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void UpdateContentProtectionPsshHelper(
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const std::string& drm_uuid,
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const std::string& pssh,
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std::list<ContentProtectionElement>* content_protection_elements);
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/// Adds <ContentProtection> elements specified by @a media_info to
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/// @a adaptation_set.
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/// Note that this will add the elements as direct chlidren of AdaptationSet.
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/// @param media_info may or may not have protected_content field.
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/// @param adaptation_set is the parent element that owns the ContentProtection
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/// elements.
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void AddContentProtectionElements(const MediaInfo& media_info,
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Representation* parent);
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/// Adds <ContentProtection> elements specified by @a media_info to
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/// @a representation.
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/// @param media_info may or may not have protected_content field.
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/// @param representation is the parent element that owns the ContentProtection
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/// elements.
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void AddContentProtectionElements(const MediaInfo& media_info,
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AdaptationSet* parent);
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} // namespace shaka
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#endif // MPD_BASE_MPD_UTILS_H_
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