#include <representation.h>

Inheritance diagram for shaka::Representation:

Public Types
enum	SuppressFlag { kSuppressWidth = 1, kSuppressHeight = 2, kSuppressFrameRate = 4 }

Public Member Functions
bool	Init ()

virtual void	AddContentProtectionElement (const ContentProtectionElement &element)

virtual void	UpdateContentProtectionPssh (const std::string &drm_uuid, const std::string &pssh)

class	AdaptationSet

class	RepresentationTest

virtual void	AddNewSegment (uint64_t start_time, uint64_t duration, uint64_t size)

virtual void	SetSampleDuration (uint32_t sample_duration)

virtual const MediaInfo &	GetMediaInfo () const

xml::scoped_xml_ptr< xmlNode >	GetXml ()

void	SuppressOnce (SuppressFlag flag)

bool	GetEarliestTimestamp (double *timestamp_seconds) const

float	GetDurationSeconds () const

uint32_t	id () const

	Representation (const MediaInfo &media_info, const MpdOptions &mpd_options, uint32_t representation_id, std::unique_ptr< RepresentationStateChangeListener > state_change_listener)

	Representation (const Representation &representation, uint64_t presentation_time_offset, std::unique_ptr< RepresentationStateChangeListener > state_change_listener)

Detailed Description

Representation class contains references to a single media stream, as well as optional ContentProtection elements for that stream.

Definition at line 54 of file representation.h.

Constructor & Destructor Documentation

◆ Representation() [1/2]

shaka::Representation::Representation	(	const MediaInfo &	media_info,
		const MpdOptions &	mpd_options,
		uint32_t	representation_id,
		std::unique_ptr< RepresentationStateChangeListener >	state_change_listener
	)

protected

Parameters

media_info	is a MediaInfo containing information on the media. media_info.bandwidth is required for 'static' profile. If media_info.bandwidth is not present in 'dynamic' profile, this tries to estimate it using the info passed to AddNewSegment().
mpd_options	is options for the entire MPD.
representation_id	is the numeric ID for the <Representation>.
state_change_listener	is an event handler for state changes to the representation. If null, no event handler registered.

Definition at line 105 of file representation.cc.

◆ Representation() [2/2]

shaka::Representation::Representation	(	const Representation &	representation,
		uint64_t	presentation_time_offset,
		std::unique_ptr< RepresentationStateChangeListener >	state_change_listener
	)

protected

Parameters

representation	points to the original Representation to be cloned.
presentation_time_offset	is the presentation time offset for the new Representation.
state_change_listener	is an event handler for state changes to the representation. If null, no event handler registered.

Definition at line 118 of file representation.cc.

Member Function Documentation

◆ AddContentProtectionElement()

void shaka::Representation::AddContentProtectionElement ( const ContentProtectionElement & element )

virtual

Add a ContenProtection element to the representation. Representation does not add <ContentProtection> elements automatically to itself even if media_info passed to AdaptationSet::AddRepresentation() has media_info.protected_content populated. This is because some MPDs should have the elements at AdaptationSet level and some at Representation level.

Parameters

element contains the ContentProtection element contents. If element has {value, schemeIdUri} set and has {“value”, “schemeIdUri”} as key for additional_attributes, then the former is used.

Definition at line 180 of file representation.cc.

◆ AddNewSegment()

void shaka::Representation::AddNewSegment	(	uint64_t	start_time,
		uint64_t	duration,
		uint64_t	size
	)

virtual

Add a media (sub)segment to the representation. AdaptationSetsubsegmentAlignment,segmentAlignment} cannot be set if this is not called for all Representations.

Parameters

start_time	is the start time for the (sub)segment, in units of the stream's time scale.
duration	is the duration of the segment, in units of the stream's time scale.
size	of the segment in bytes.

Definition at line 192 of file representation.cc.

◆ GetDurationSeconds()

float shaka::Representation::GetDurationSeconds ( ) const

Returns: The duration of the Representation in seconds.

Definition at line 314 of file representation.cc.

◆ GetEarliestTimestamp()

bool shaka::Representation::GetEarliestTimestamp ( double * timestamp_seconds ) const

Gets the earliest, normalized segment timestamp.

Returns: true if successful, false otherwise.

Definition at line 303 of file representation.cc.

◆ GetMediaInfo()

const MediaInfo & shaka::Representation::GetMediaInfo ( ) const

virtual

Returns: MediaInfo for the Representation.

Definition at line 226 of file representation.cc.

◆ GetXml()

xml::scoped_xml_ptr< xmlNode > shaka::Representation::GetXml ( )

Returns: Copy of <Representation>.

Definition at line 236 of file representation.cc.

◆ id()

uint32_t shaka::Representation::id ( ) const

inline

Returns: ID number for <Representation>.

Definition at line 139 of file representation.h.

◆ Init()

bool shaka::Representation::Init ( )

Tries to initialize the instance. If this does not succeed, the instance should not be used.

Returns: true on success, false otherwise.

Definition at line 138 of file representation.cc.

◆ SetSampleDuration()

void shaka::Representation::SetSampleDuration ( uint32_t sample_duration )

virtual

Set the sample duration of this Representation. Sample duration is not available right away especially for live. This allows setting the sample duration after the Representation has been initialized.

Parameters

sample_duration is the duration of a sample.

Definition at line 216 of file representation.cc.

◆ SuppressOnce()

void shaka::Representation::SuppressOnce ( SuppressFlag flag )

By calling this methods, the next time GetXml() is called, the corresponding attributes will not be set. For example, if SuppressOnce(kSuppressWidth) is called, then GetXml() will return a <Representation> element without a attribute. Note that it only applies to the next call to GetXml(), calling GetXml() again without calling this methods will return a <Representation> element with the attribute. This may be called multiple times to set different (or the same) flags.

Definition at line 299 of file representation.cc.

◆ UpdateContentProtectionPssh()

void shaka::Representation::UpdateContentProtectionPssh	(	const std::string &	drm_uuid,
		const std::string &	pssh
	)

virtual

Update the 'cenc:pssh' element for drm_uuid ContentProtection element. If the element does not exist, this will add one.

Parameters

drm_uuid	is the UUID of the DRM for encryption.
pssh	is the content of <cenc:pssh> element. Note that DASH IF IOP mentions that this should be base64 encoded string of the whole pssh box.

Attention: This might get removed once DASH IF IOP specification makes a a clear guideline on how to handle key rotation. Also to get this working with shaka-player, this method DOES NOT update the PSSH element. Instead, it removes the element regardless of the content of pssh.

Definition at line 186 of file representation.cc.

The documentation for this class was generated from the following files:

packager/mpd/base/representation.h
packager/mpd/base/representation.cc

Public Types

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ Representation() [1/2]

◆ Representation() [2/2]

Member Function Documentation

◆ AddContentProtectionElement()

◆ AddNewSegment()

◆ GetDurationSeconds()

◆ GetEarliestTimestamp()

◆ GetMediaInfo()

◆ GetXml()

◆ id()

◆ Init()

◆ SetSampleDuration()

◆ SuppressOnce()

◆ UpdateContentProtectionPssh()