Class: shaka.util.CmcdManager

A CmcdManager maintains CMCD state as well as a collection of utility functions.

Constructor

new CmcdManager(playerInterface, config)

A CmcdManager maintains CMCD state as well as a collection of utility functions.

Parameters:
Name Type Description
playerInterface shaka.util.CmcdManager.PlayerInterface
config shaka.extern.CmcdConfiguration
Source:

Members

ObjectType :string

Type:
  • string
Properties:
Name Value Type Description
MANIFEST m string
AUDIO a string
VIDEO v string
MUXED av string
INIT i string
CAPTION c string
TIMED_TEXT tt string
KEY k string
OTHER o string
Source:

StreamingFormat :string

Type:
  • string
Properties:
Name Value Type Description
DASH d string
LOW_LATENCY_DASH ld string
HLS h string
LOW_LATENCY_HLS lh string
SMOOTH s string
OTHER o string
Source:

StreamType :string

Type:
  • string
Properties:
Name Value Type Description
VOD v string
LIVE l string
Source:

Version :number

Type:
  • number
Properties:
Name Value Type Description
VERSION_1 1 number
VERSION_2 2 number
Source:

buffering_ :boolean

Type:
  • boolean
Source:

config_ :shaka.extern.CmcdConfiguration

Type:
Source:

eventManager_ :shaka.util.EventManager

Type:
Source:

lowLatency_ :boolean

Type:
  • boolean
Source:

msdSent_ :boolean

Type:
  • boolean
Source:

playbackPlayingTime_ :number|undefined

Type:
  • number | undefined
Source:

playbackPlayTime_ :number|undefined

Type:
  • number | undefined
Source:

playbackStarted_ :boolean

Type:
  • boolean
Source:

playerInterface_ :shaka.util.CmcdManager.PlayerInterface

Type:
Source:

sf_ :shaka.util.CmcdManager.StreamingFormat|undefined

Streaming format
Type:
Source:

startTimeOfLoad_ :number

Type:
  • number
Source:

starved_ :boolean

Type:
  • boolean
Source:

video_ :HTMLMediaElement

Type:
Source:

Methods

appendQueryToUri(uri, query) → {string}

Append query args to a uri.
Parameters:
Name Type Description
uri string
query string
Source:
Returns:
Type
string

serialize(data) → {string}

Serialize a CMCD data object according to the rules defined in the section 3.2 of [CTA-5004](https://cdn.cta.tech/cta/media/media/resources/standards/pdfs/cta-5004-final.pdf).
Parameters:
Name Type Description
data CmcdData The CMCD data object
Source:
Returns:
Type
string

toHeaders(data) → {Object}

Convert a CMCD data object to request headers according to the rules defined in the section 2.1 and 3.2 of [CTA-5004](https://cdn.cta.tech/cta/media/media/resources/standards/pdfs/cta-5004-final.pdf).
Parameters:
Name Type Description
data CmcdData The CMCD data object
Source:
Returns:
Type
Object

toQuery(data) → {string}

Convert a CMCD data object to query args according to the rules defined in the section 2.2 and 3.2 of [CTA-5004](https://cdn.cta.tech/cta/media/media/resources/standards/pdfs/cta-5004-final.pdf).
Parameters:
Name Type Description
data CmcdData The CMCD data object
Source:
Returns:
Type
string

appendSrcData(uri, mimeType) → {string}

Apply CMCD data to streams loaded via src=.
Parameters:
Name Type Description
uri string
mimeType string
Source:
Returns:
Type
string

appendTextTrackData(uri) → {string}

Apply CMCD data to side car text track uri.
Parameters:
Name Type Description
uri string
Source:
Returns:
Type
string

apply_(requestnon-null, datanon-null, useHeaders)

Apply CMCD data to a request.
Parameters:
Name Type Description
request shaka.extern.Request The request to apply CMCD data to
data CmcdData The data object
useHeaders boolean Send data via request headers
Source:

applyData(typenon-null, requestnon-null, contextopt)

Apply CMCD data to a request.
Parameters:
Name Type Attributes Description
type shaka.net.NetworkingEngine.RequestType The request type
request shaka.extern.Request The request to apply CMCD data to
context shaka.extern.RequestContext <optional>
 The request context
Source:

applyManifestData(requestnon-null, context)

Apply CMCD data to a manifest request.
Parameters:
Name Type Description
request shaka.extern.Request The request to apply CMCD data to
context shaka.extern.RequestContext The request context
Source:

applySegmentData(requestnon-null, context)

Apply CMCD data to a segment request
Parameters:
Name Type Description
request shaka.extern.Request
context shaka.extern.RequestContext The request context
Source:

applyTextData(requestnon-null)

Apply CMCD data to a text request
Parameters:
Name Type Description
request shaka.extern.Request
Source:

calculateMSD_() → {number|undefined}

Calculate messured start delay
Source:
Returns:
Type
number | undefined

calculateRtp_(stream, segment) → {number}

Calculate requested maximun throughput
Parameters:
Name Type Description
stream shaka.extern.Stream
segment shaka.media.SegmentReference
Source:
Returns:
Type
number

configure(config)

Called by the Player to provide an updated configuration any time it changes.
Parameters:
Name Type Description
config shaka.extern.CmcdConfiguration
Source:

createData_() → {CmcdData}

Create baseline CMCD data
Source:
Returns:
Type
CmcdData

filterKeys_(data) → {CmcdData}

Filter the CMCD data object to include only the keys specified in the configuration.
Parameters:
Name Type Description
data CmcdData
Source:
Returns:
Type
CmcdData

getBufferLength_(type) → {number}

Get the buffer length for a media type in milliseconds
Parameters:
Name Type Description
type string
Source:
Returns:
Type
number

getObjectType_(context)

The CMCD object type.
Parameters:
Name Type Description
context shaka.extern.RequestContext The request context
Source:

getObjectTypeFromMimeType_(mimeTypenon-null) → {shaka.util.CmcdManager.ObjectType|undefined}

The CMCD object type from mimeType.
Parameters:
Name Type Description
mimeType string
Source:
Returns:
Type
shaka.util.CmcdManager.ObjectType | undefined

getRemainingBufferLength_(type) → {number}

Get the remaining buffer length for a media type in milliseconds
Parameters:
Name Type Description
type string
Source:
Returns:
Type
number

getStreamFormat_(type) → {shaka.util.CmcdManager.StreamingFormat|undefined}

Get the stream format
Parameters:
Name Type Description
type shaka.net.NetworkingEngine.AdvancedRequestType The request's advanced type
Source:
Returns:
Type
shaka.util.CmcdManager.StreamingFormat | undefined

getStreamType_() → {shaka.util.CmcdManager.StreamType}

Get the stream type
Source:
Returns:
Type
shaka.util.CmcdManager.StreamType

getTopBandwidth_(type) → {number}

Get the highest bandwidth for a given type.
Parameters:
Name Type Description
type string
Source:
Returns:
Type
number

onPlaybackPlay_()

Set playbackPlayTime_ when the play event is triggered
Source:

onPlaybackPlaying_()

Set playbackPlayingTime_
Source:

reset()

Resets the CmcdManager.
Source:

setBuffering(buffering)

Set the buffering state
Parameters:
Name Type Description
buffering boolean
Source:

setLowLatency(lowLatency)

Set the low latency
Parameters:
Name Type Description
lowLatency boolean
Source:

setMediaElement(mediaElement)

Set media element and setup event listeners
Parameters:
Name Type Description
mediaElement HTMLMediaElement The video element
Source:

setStartTimeOfLoad(startTimeOfLoad)

Set start time of load if autoplay is enabled
Parameters:
Name Type Description
startTimeOfLoad number
Source:

setupMSDEventListeners_()

Setup event listeners for msd calculation
Source:

urlToRelativePath_(url, base) → {string}

Constructs a relative path from a URL
Parameters:
Name Type Description
url string
base string
Source:
Returns:
Type
string

Type Definitions

PlayerInterface

Type:
  • {getBandwidthEstimate: function(): number, getBufferedInfo: function(): shaka.extern.BufferedInfo, getCurrentTime: function(): number, getPlaybackRate: function(): number, getVariantTracks: function(): Array.<shaka.extern.Track>, isLive: function(): boolean, getLiveLatency: function(): number}
Properties:
Name Type Description
getBandwidthEstimate function Get the estimated bandwidth in bits per second.
getBufferedInfo function Get information about what the player has buffered.
getCurrentTime function Get the current time
getPlaybackRate function Get the playback rate
getVariantTracks function Get the variant tracks
isLive function Get if the player is playing live content.
getLiveLatency function Get latency in milliseconds between the live edge and what's currently playing.
Source: