Class: shaka.transmuxer.TransmuxerProxy

A proxy transmuxer that delegates transmux() calls to a Web Worker. Synchronous methods (isSupported, convertCodecs, getOriginalMimeType) are handled on the main thread by the inner transmuxer. Only the heavy transmux() work is offloaded to the worker. The worker URL must be supplied by the integrating application via the `mediaSource.transmuxWorkerUrl` config option. The library does not attempt to discover it. If the URL is empty or the worker cannot be created, the proxy falls back to main-thread transmuxing.

Constructor

new TransmuxerProxy(innerTransmuxernon-null, workerUrlopt)

A proxy transmuxer that delegates transmux() calls to a Web Worker. Synchronous methods (isSupported, convertCodecs, getOriginalMimeType) are handled on the main thread by the inner transmuxer. Only the heavy transmux() work is offloaded to the worker. The worker URL must be supplied by the integrating application via the `mediaSource.transmuxWorkerUrl` config option. The library does not attempt to discover it. If the URL is empty or the worker cannot be created, the proxy falls back to main-thread transmuxing.

Parameters:
Name Type Attributes Description
innerTransmuxer shaka.extern.Transmuxer The real transmuxer to use for sync methods and as fallback.
workerUrl string <optional>
 URL of the standalone transmuxer worker script. When empty, the proxy uses main-thread transmuxing.
Implements:
Source:

Members

activeInstances_ :Map<number, !shaka.transmuxer.TransmuxerProxy>

Map of active instances keyed by ID, for routing worker messages.
Type:
Source:

nextId_ :number

Type:
  • number
Source:

sharedWorker_ :Worker

Shared Worker instance used by all TransmuxerProxy instances.
Type:
  • Worker
Source:

TIMEOUT_MS_ :number

Timeout in milliseconds for a worker transmux response. If the worker does not respond within this time, the request is rejected and future calls fall back to the main thread.
Type:
  • number
Source:

attachedToWorker_ :boolean

Type:
  • boolean
Source:

id_ :number

Type:
  • number
Source:

innerTransmuxer_ :shaka.extern.Transmuxer

Type:
Source:

nextReqId_ :number

Type:
  • number
Source:

pendingRequests_ :Map<number, {resolve: function(*), reject: function(*), timer: shaka.util.Timer}>

Maps request IDs to pending promise resolvers and their timeout timers.
Type:
  • Map<number, {resolve: function(*), reject: function(*), timer: shaka.util.Timer}>
Source:

workerFailed_ :boolean

Type:
  • boolean
Source:

workerReady_ :boolean

Type:
  • boolean
Source:

workerUrl_ :string

Type:
  • string
Source:

Methods

getOrCreateWorker_(workerUrlOverride) → {Worker}

Gets or creates the shared worker. Returns null if the worker cannot be created (unsupported device, missing script URL, or creation error).
Parameters:
Name Type Description
workerUrlOverride string
Source:
Returns:
Type
Worker

terminateWorker_(message)

Marks all active instances as failed, rejects their pending requests, and shuts down the shared worker.
Parameters:
Name Type Description
message string Error message for rejected promises.
Source:

convertCodecs(contentType, mimeType) → {string}

For any stream, convert its codecs to MP4 codecs.
Parameters:
Name Type Description
contentType string
mimeType string
Implements:
Source:
Returns:
Type
string

destroy()

Destroy
Implements:
Source:

getOriginalMimeType() → {string}

Returns the original mimetype of the transmuxer.
Implements:
Source:
Returns:
Type
string

isSupported(mimeType, contentTypeopt) → {boolean}

Check if the mime type and the content type is supported.
Parameters:
Name Type Attributes Description
mimeType string
contentType string <optional>
Implements:
Source:
Returns:
Type
boolean

onWorkerMessage_(msgnon-null)

Handles messages from the shared worker for this instance.
Parameters:
Name Type Description
msg Object
Source:

transmux(data, stream, referencenullable, duration, contentType) → {Promise<(!Uint8Array|!shaka.extern.TransmuxerOutput)>}

Transmux a input data to MP4.
Parameters:
Name Type Attributes Description
data BufferSource
stream shaka.extern.Stream
reference shaka.media.SegmentReference <nullable>
 The segment reference, or null for init segments
duration number
contentType string
Implements:
Source:
Returns:
If you only want to return the result, use Uint8Array, if you want to separate the initialization segment and the data segment, you have to use shaka.extern.TransmuxerOutput
Type
Promise<(!Uint8Array|!shaka.extern.TransmuxerOutput)>