Files
Vosklet/usage
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..
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2024-02-07 10:25:02 -08:00
2024-02-07 10:25:02 -08:00
2024-02-07 10:25:02 -08:00
2024-03-24 19:38:54 -07:00
2024-02-07 10:25:02 -08:00

API interface

JS' window object

Function/Object Description
Promise<Module> loadVosklet() Load Vosklet module interface

Shared interface

Function/Object Description
delete() Delete this object, see why this is neccessary.

Module object

Function/Object Description
Promise<Model> makeModel(path: string, url: string, id: string)

Promise<SpkModel> makeSpkModel(path: string, url: string, id: string)
Make a Model or SpkModel, model files must be directly under the model root, and compressed model must be in .tgz format. If:
- path contains valid model files and id is the same, there will not be a fetch from url.
- path doesn't contain valid model files, or if it contains valid model files but id is different, there will be a fetch from url, and the model is stored with id. Models are thread-safe, reuse them as much as possible!
Promise<Recognizer> makeRecognizer(model: Model, sampleRate: float)

Promise<Recognizer> makeRecognizerWithSpkModel(model: Model, spkModel: spkModel, sampleRate: float)

Promise<Recognizer> makeRecognizerWithGrm(model: Model, grammar: string, sampleRate: float)
Make a Recognizer, it will use model's thread if it's the first user of model, else it will use a new thread.
setLogLevel(lvl: int) Set Vosk's log level (default: 0: Info)
-2: Error
-1: Warning
1: Verbose
2: More verbose
3: Debug
cleanUp() A convenience function that call delete() on all objects and revoke all URLs. Put this at the end of your code!
epMode Endpointer modes (enum)

Recognizer object

Function/Object Description
Promise<AudioWorkletNode> getNode(ctx: AudioContext, channelIndex = 0: int) Get a node that process audio. It has 1 input and no output, channelIndex must point to a 16-bit mono channel of the input
recognize(buf: AudioBuffer, channelIndex = 0: int) Recognize an AudioBuffer, usually from something like BaseAudioContext.decodeAudioData(), channelIndex must point to a 16-bit mono channel of buf
setPartialWords(partialWords: bool) See Vosk's description (default: false)
setWords(words: bool) See Vosk's description (default: false)
setNLSML(nlsml: bool) See Vosk's description (default: false)
setMaxAlternatives(alts: int) See Vosk's description (default: false)
setGrm(grm: string) See Vosk's description (default: none)
setSpkModel(mdl: SpkModel) See Vosk's description (default: none)
setEndpointerMode(mode: epMode) See Vosk's description (default: ANSWER_DEFAULT)
setEndpointerDelays(tStartMax: float, tEnd: float, tMax: float) See Vosk's description
Event Description
partialResult There is a partial recognition result, check the event's detail property
result There is a full recognition result, check the event's detail property

User agent notes

SharedArrayBuffer

Vosklet require SharedArrayBuffer to share thread's data, so these response headers must be set:

  • Cross-Origin-Embedder-Policy ---> require-corp
  • Cross-Origin-Opener-Policy ---> same-origin

If you can't set them, you may use a hacky workaround at src/addCOI.js.

Compilation

Changing any option to non-default values requires recompilation

git clone --depth=1 https://github.com/msqr1/Vosklet &&
cd Vosklet/src &&
[Options] make
Option Description Default value
MAX_MEMORY Set max memory, valid suffixes: kb, mb, gb, tb or none (bytes) 300mb, as recommended
MAX_THREADS Set the max number of thread, this should be equal to the number of model or speaker model that is used in the program (>1) 1
COMPILE_JOBS Set the number of jobs (threads) when building $(nproc)
EMSDK Set EMSDK's path (will install EMSDK in root folder if unset) ../emsdk