assemblyai/dist/assemblyai.streaming.umd.min.js

The AssemblyAI JavaScript SDK provides an easy-to-use interface for interacting with the AssemblyAI API, which supports async and real-time transcription, as well as the latest LeMUR models.

!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e="undefined"!=typeof globalThis?globalThis:e||self).assemblyai={})}(this,(function(e){"use strict";class t extends Error{constructor(e="DualChannelCapture requires a browser environment (AudioContext is undefined)."){super(e),this.name="BrowserOnlyError"}}function s(e,t,s,n){return new(s||(s=Promise))((function(i,r){function o(e){try{l(n.next(e))}catch(e){r(e)}}function a(e){try{l(n.throw(e))}catch(e){r(e)}}function l(e){var t;e.done?i(e.value):(t=e.value,t instanceof s?t:new s((function(e){e(t)}))).then(o,a)}l((n=n.apply(e,t||[])).next())}))}"function"==typeof SuppressedError&&SuppressedError;const{WritableStream:n}="undefined"!=typeof window?window:"undefined"!=typeof global?global:globalThis;var i,r;const o=null!==(r=null!==(i=null!==WebSocket&&void 0!==WebSocket?WebSocket:null===global||void 0===global?void 0:global.WebSocket)&&void 0!==i?i:null===window||void 0===window?void 0:window.WebSocket)&&void 0!==r?r:null===self||void 0===self?void 0:self.WebSocket,a=(e,t)=>t?new o(e,t):new o(e),l={[4e3]:"Sample rate must be a positive integer",[4001]:"Not Authorized",[4002]:"Insufficient funds",[4003]:"This feature is paid-only and requires you to add a credit card. Please visit https://app.assemblyai.com/ to add a credit card to your account.",[4004]:"Session ID does not exist",[4008]:"Session has expired",[4010]:"Session is closed",[4029]:"Rate limited",[4030]:"Unique session violation",[4031]:"Session Timeout",[4032]:"Audio too short",[4033]:"Audio too long",[4034]:"Audio too small to transcode",[4100]:"Bad JSON",[4101]:"Bad schema",[4102]:"Too many streams",[4103]:"This session has been reconnected. This WebSocket is no longer valid.",[1013]:"Reconnect attempts exhausted",[4104]:"Could not parse word boost parameter"};class c extends Error{}const h=4e3,d=4001,u=4002,m=4003,p=4101,f={[3005]:"Server error",[3006]:"Input validation error",[3007]:"Audio chunk duration violation",[3008]:"Session expired: maximum session duration exceeded",[3009]:"Too many concurrent sessions",[h]:"Sample rate must be a positive integer",[d]:"Not Authorized",[u]:"Insufficient funds",[m]:"This feature is paid-only and requires you to add a credit card. Please visit https://app.assemblyai.com/ to add a credit card to your account.",[4004]:"Session ID does not exist",[4008]:"Session has expired",[4010]:"Session is closed",[4029]:"Rate limited",[4030]:"Unique session violation",[4031]:"Session Timeout",[4032]:"Audio too short",[4033]:"Audio too long",[4034]:"Audio too small to transcode",[p]:"Bad schema",[4102]:"Too many streams",[4103]:"This session has been reconnected. This WebSocket is no longer valid."};class v extends Error{}const g='{"terminate_session":true}';class w{constructor(e){var t,s;if(this.listeners={},this.realtimeUrl=null!==(t=e.realtimeUrl)&&void 0!==t?t:"wss://api.assemblyai.com/v2/realtime/ws",this.sampleRate=null!==(s=e.sampleRate)&&void 0!==s?s:16e3,this.wordBoost=e.wordBoost,this.encoding=e.encoding,this.endUtteranceSilenceThreshold=e.endUtteranceSilenceThreshold,this.disablePartialTranscripts=e.disablePartialTranscripts,"token"in e&&e.token&&(this.token=e.token),"apiKey"in e&&e.apiKey&&(this.apiKey=e.apiKey),!this.token&&!this.apiKey)throw new Error("API key or temporary token is required.")}connectionUrl(){const e=new URL(this.realtimeUrl);if("wss:"!==e.protocol)throw new Error("Invalid protocol, must be wss");const t=new URLSearchParams;return this.token&&t.set("token",this.token),t.set("sample_rate",this.sampleRate.toString()),this.wordBoost&&this.wordBoost.length>0&&t.set("word_boost",JSON.stringify(this.wordBoost)),this.encoding&&t.set("encoding",this.encoding),t.set("enable_extra_session_information","true"),this.disablePartialTranscripts&&t.set("disable_partial_transcripts",this.disablePartialTranscripts.toString()),e.search=t.toString(),e}on(e,t){this.listeners[e]=t}connect(){return new Promise((e=>{if(this.socket)throw new Error("Already connected");const t=this.connectionUrl();this.token?this.socket=a(t.toString()):(console.warn("API key authentication is not supported for the RealtimeTranscriber in browser environment. Use temporary token authentication instead.\nLearn more at https://github.com/AssemblyAI/assemblyai-node-sdk/blob/main/docs/compat.md#browser-compatibility."),this.socket=a(t.toString(),{headers:{Authorization:this.apiKey}})),this.socket.binaryType="arraybuffer",this.socket.onopen=()=>{void 0!==this.endUtteranceSilenceThreshold&&null!==this.endUtteranceSilenceThreshold&&this.configureEndUtteranceSilenceThreshold(this.endUtteranceSilenceThreshold)},this.socket.onclose=({code:e,reason:t})=>{var s,n;t||e in l&&(t=l[e]),null===(n=(s=this.listeners).close)||void 0===n||n.call(s,e,t)},this.socket.onerror=e=>{var t,s,n,i;e.error?null===(s=(t=this.listeners).error)||void 0===s||s.call(t,e.error):null===(i=(n=this.listeners).error)||void 0===i||i.call(n,new Error(e.message))},this.socket.onmessage=({data:t})=>{var s,n,i,r,o,a,l,h,d,u,m,p,f,v,g;const w=JSON.parse(t.toString());if("error"in w)null===(n=(s=this.listeners).error)||void 0===n||n.call(s,new c(w.error));else switch(w.message_type){case"SessionBegins":{const t={sessionId:w.session_id,expiresAt:new Date(w.expires_at)};e(t),null===(r=(i=this.listeners).open)||void 0===r||r.call(i,t);break}case"PartialTranscript":w.created=new Date(w.created),null===(a=(o=this.listeners).transcript)||void 0===a||a.call(o,w),null===(h=(l=this.listeners)["transcript.partial"])||void 0===h||h.call(l,w);break;case"FinalTranscript":w.created=new Date(w.created),null===(u=(d=this.listeners).transcript)||void 0===u||u.call(d,w),null===(p=(m=this.listeners)["transcript.final"])||void 0===p||p.call(m,w);break;case"SessionInformation":null===(v=(f=this.listeners).session_information)||void 0===v||v.call(f,w);break;case"SessionTerminated":null===(g=this.sessionTerminatedResolve)||void 0===g||g.call(this)}}}))}sendAudio(e){this.send(e)}stream(){return new n({write:e=>{this.sendAudio(e)}})}forceEndUtterance(){this.send('{"force_end_utterance":true}')}configureEndUtteranceSilenceThreshold(e){this.send(`{"end_utterance_silence_threshold":${e}}`)}send(e){if(!this.socket||this.socket.readyState!==this.socket.OPEN)throw new Error("Socket is not open for communication");this.socket.send(e)}close(){return s(this,arguments,void 0,(function*(e=!0){var t;if(this.socket){if(this.socket.readyState===this.socket.OPEN)if(e){const e=new Promise((e=>{this.sessionTerminatedResolve=e}));this.socket.send(g),yield e}else this.socket.send(g);(null===(t=this.socket)||void 0===t?void 0:t.removeAllListeners)&&this.socket.removeAllListeners(),this.socket.close()}this.listeners={},this.socket=void 0}))}}class y{constructor(e={}){var t,s,n,i;this.hangoverRemaining=0,this.thresholdRatio=null!==(t=e.thresholdRatio)&&void 0!==t?t:3,this.noiseFloorAlpha=null!==(s=e.noiseFloorAlpha)&&void 0!==s?s:.05,this.hangoverFrames=null!==(n=e.hangoverFrames)&&void 0!==n?n:10,this.initialNoiseFloor=null!==(i=e.initialNoiseFloor)&&void 0!==i?i:1e-4,this.noiseFloor=this.initialNoiseFloor}process(e){let t=0;for(let s=0;s<e.length;s++)t+=e[s]*e[s];const s=e.length>0?Math.sqrt(t/e.length):0;let n=s>this.noiseFloor*this.thresholdRatio;return n?this.hangoverRemaining=this.hangoverFrames:this.hangoverRemaining>0?(this.hangoverRemaining--,n=!0):this.noiseFloor=this.noiseFloor*(1-this.noiseFloorAlpha)+s*this.noiseFloorAlpha,{active:n,energy:s}}reset(){this.noiseFloor=this.initialNoiseFloor,this.hangoverRemaining=0}}class k{constructor(e){this.windowMs=e,this.frames=[],this.head=0}pushFrame(e){this.frames.push(e);const t=e.ts-this.windowMs;for(;this.head<this.frames.length&&this.frames[this.head].ts<t;)this.head++;this.head>1024&&2*this.head>this.frames.length&&(this.frames=this.frames.slice(this.head),this.head=0)}framesInWindow(e,t){const s=[];for(let n=this.head;n<this.frames.length;n++){const i=this.frames[n];if(!(i.ts<e)){if(i.ts>t)break;s.push(i)}}return s}clear(){this.frames=[],this.head=0}}function b(e,t,s){const n=function(e){var t;const s=new Map;for(const n of e)n.active&&s.set(n.channel,(null!==(t=s.get(n.channel))&&void 0!==t?t:0)+n.rms);return s}(t.framesInWindow(e.start,e.end));if(0===n.size)return"unknown";const i=[...n.entries()].sort(((e,t)=>t[1]-e[1]));if(1===i.length)return i[0][0];const[r,o]=i[0],[a,l]=i[1];return o>=s.dominanceRatio*l||o>l?r:l>o?a:"unknown"}function S(e){var t;const s=new Map;for(const n of e){if(!n.channel||"unknown"===n.channel)continue;const e=Math.max(0,n.end-n.start);s.set(n.channel,(null!==(t=s.get(n.channel))&&void 0!==t?t:0)+e)}if(0===s.size)return"unknown";const n=[...s.entries()].sort(((e,t)=>t[1]-e[1]));if(1===n.length)return n[0][0];const[i,r]=n[0],[,o]=n[1];return r===o?"unknown":i}function _(e,t,s){for(const n of e.words)n.channel=b(n,t,s);e.channel=S(e.words)}const T='{"type":"Terminate"}',A=new Set([h,d,u,m,p]);function x(e){return 1e3!==e&&!A.has(e)}class P{constructor(e){var t,s,n,i,r,o,a,l,c;if(this.listeners={},this.isDualChannel=!1,this.vadFrameSamples=0,this.minChunkSamples=0,this.maxChunkSamples=0,this.params=Object.assign(Object.assign({},e),{websocketBaseUrl:e.websocketBaseUrl||"wss://streaming.assemblyai.com/v3/ws"}),"token"in e&&e.token&&(this.token=e.token),"apiKey"in e&&e.apiKey&&(this.apiKey=e.apiKey),!this.token&&!this.apiKey)throw new Error("API key or temporary token is required.");const h="opus"===e.encoding||"ogg_opus"===e.encoding||"aac"===e.encoding;if(void 0===e.sampleRate&&(!h||e.channels))throw new Error('`sampleRate` is required; it may only be omitted when `encoding` is "opus", "ogg_opus", or "aac" (these streams are self-describing) and dual-channel mode is not used.');if(e.channels){if(2!==e.channels.length)throw new Error("StreamingTranscriber.channels must have exactly 2 entries.");const h=e.channels.map((e=>e.name));if(new Set(h).size!==h.length)throw new Error("StreamingTranscriber.channels names must be unique.");this.isDualChannel=!0,this.channelNames=h;const d=null!==(t=e.channelAttribution)&&void 0!==t?t:{};this.attributionParams={dominanceRatio:null!==(s=d.dominanceRatio)&&void 0!==s?s:4,timelineWindowMs:null!==(n=d.timelineWindowMs)&&void 0!==n?n:3e4,createVad:null!==(i=d.createVad)&&void 0!==i?i:()=>new y,flushIntervalMs:null!==(r=d.flushIntervalMs)&&void 0!==r?r:50,resolveUnknownChannelsMethod:null!==(o=d.resolveUnknownChannelsMethod)&&void 0!==o?o:"window",resolutionWindowWords:null!==(a=d.resolutionWindowWords)&&void 0!==a?a:2,speakerHistoryMinRmsEvidence:null!==(l=d.speakerHistoryMinRmsEvidence)&&void 0!==l?l:.5,speakerHistoryDominanceRatio:null!==(c=d.speakerHistoryDominanceRatio)&&void 0!==c?c:3},"speaker-history"===this.attributionParams.resolveUnknownChannelsMethod&&(this.speakerHistory=new Map);const u=e.sampleRate;this.vadFrameSamples=Math.max(1,Math.round(.02*u)),this.minChunkSamples=Math.max(1,Math.round(.05*u)),this.maxChunkSamples=Math.max(this.minChunkSamples,Math.round(.2*u)),this.channelBuffers=new Map(h.map((e=>[e,[]]))),this.channelSamplesReceived=new Map(h.map((e=>[e,0]))),this.channelVadFloatBuffers=new Map(h.map((e=>[e,new Float32Array(this.vadFrameSamples)]))),this.channelVadBufferIdx=new Map(h.map((e=>[e,0]))),this.channelVads=new Map(h.map((e=>[e,this.attributionParams.createVad(e)]))),this.timeline=new k(this.attributionParams.timelineWindowMs)}}connectionUrl(){var e,t;const s=new URL(null!==(e=this.params.websocketBaseUrl)&&void 0!==e?e:"");if("wss:"!==s.protocol)throw new Error("Invalid protocol, must be wss");const n=new URLSearchParams;this.token&&n.set("token",this.token),void 0!==this.params.sampleRate&&n.set("sample_rate",this.params.sampleRate.toString()),this.params.endOfTurnConfidenceThreshold&&n.set("end_of_turn_confidence_threshold",this.params.endOfTurnConfidenceThreshold.toString()),void 0!==this.params.minEndOfTurnSilenceWhenConfident&&(void 0!==this.params.minTurnSilence?console.warn("[Deprecation Warning] Both `minEndOfTurnSilenceWhenConfident` and `minTurnSilence` are set. Using `minTurnSilence`; `minEndOfTurnSilenceWhenConfident` is deprecated."):console.warn("[Deprecation Warning] `minEndOfTurnSilenceWhenConfident` is deprecated and will be removed in a future release. Please use `minTurnSilence` instead."));const i=null!==(t=this.params.minTurnSilence)&&void 0!==t?t:this.params.minEndOfTurnSilenceWhenConfident;return void 0!==i&&n.set("min_turn_silence",i.toString()),this.params.maxTurnSilence&&n.set("max_turn_silence",this.params.maxTurnSilence.toString()),void 0!==this.params.vadThreshold&&n.set("vad_threshold",this.params.vadThreshold.toString()),this.params.formatTurns&&n.set("format_turns",this.params.formatTurns.toString()),void 0!==this.params.sessionHeartbeat&&n.set("session_heartbeat",this.params.sessionHeartbeat.toString()),this.params.encoding&&n.set("encoding",this.params.encoding.toString()),this.params.keytermsPrompt?n.set("keyterms_prompt",JSON.stringify(this.params.keytermsPrompt)):this.params.keyterms&&(console.warn("[Deprecation Warning] `keyterms` is deprecated and will be removed in a future release. Please use `keytermsPrompt` instead."),n.set("keyterms_prompt",JSON.stringify(this.params.keyterms))),this.params.prompt&&n.set("prompt",this.params.prompt),this.params.agentContext&&n.set("agent_context",this.params.agentContext),this.params.filterProfanity&&n.set("filter_profanity",this.params.filterProfanity.toString()),"u3-pro"===this.params.speechModel&&console.warn("[Deprecation Warning] The speech model `u3-pro` is deprecated and will be removed in a future release. Please use `u3-rt-pro` instead."),void 0!==this.params.speechModel&&n.set("speech_model",this.params.speechModel.toString()),void 0!==this.params.languageCode&&(console.warn("[Deprecation Warning] `languageCode` is deprecated and will be removed in a future release. Please use `languageCodes` instead."),n.set("language_code",this.params.languageCode)),void 0!==this.params.languageCodes&&n.set("language_codes",JSON.stringify(this.params.languageCodes)),void 0!==this.params.languageDetection&&n.set("language_detection",this.params.languageDetection.toString()),this.params.domain&&n.set("domain",this.params.domain),void 0!==this.params.inactivityTimeout&&n.set("inactivity_timeout",this.params.inactivityTimeout.toString()),void 0!==this.params.speakerLabels&&n.set("speaker_labels",this.params.speakerLabels.toString()),void 0!==this.params.maxSpeakers&&n.set("max_speakers",this.params.maxSpeakers.toString()),this.params.voiceFocus&&n.set("voice_focus",this.params.voiceFocus),void 0!==this.params.voiceFocusThreshold&&n.set("voice_focus_threshold",this.params.voiceFocusThreshold.toString()),void 0!==this.params.continuousPartials&&n.set("continuous_partials",this.params.continuousPartials.toString()),void 0!==this.params.interruptionDelay&&n.set("interruption_delay",this.params.interruptionDelay.toString()),void 0!==this.params.turnLeftPadMs&&n.set("turn_left_pad_ms",this.params.turnLeftPadMs.toString()),this.params.customerSupportAudioCapture&&(console.warn("`customerSupportAudioCapture=true` will record session audio. Only enable this when explicitly coordinating with AssemblyAI support."),n.set("_customer_support_audio_capture",this.params.customerSupportAudioCapture.toString())),this.params.webhookUrl&&n.set("webhook_url",this.params.webhookUrl),this.params.webhookAuthHeaderName&&n.set("webhook_auth_header_name",this.params.webhookAuthHeaderName),this.params.webhookAuthHeaderValue&&n.set("webhook_auth_header_value",this.params.webhookAuthHeaderValue),void 0!==this.params.includePartialTurns&&n.set("include_partial_turns",this.params.includePartialTurns.toString()),void 0!==this.params.redactPii&&n.set("redact_pii",this.params.redactPii.toString()),void 0!==this.params.redactPiiPolicies&&n.set("redact_pii_policies",JSON.stringify(this.params.redactPiiPolicies)),void 0!==this.params.redactPiiSub&&n.set("redact_pii_sub",this.params.redactPiiSub),void 0!==this.params.mode&&n.set("mode",this.params.mode),void 0!==this.params.llmGateway&&n.set("llm_gateway",JSON.stringify(this.params.llmGateway)),s.search=n.toString(),s}on(e,t){this.listeners[e]=t}connect(){return s(this,void 0,void 0,(function*(){var e,t;if(this.socket)throw new Error("Already connected");const s=null!==(e=this.params.maxConnectionRetries)&&void 0!==e?e:2,n=null!==(t=this.params.connectionRetryDelay)&&void 0!==t?t:500;let i;for(let e=0;e<=s;e++)try{return yield this.connectOnce()}catch(t){i=t;if(!(!0===t.retryable)||e===s)throw t;console.warn(`Streaming connect attempt ${e+1}/${s+1} failed (${t.message}); retrying`),n>0&&(yield new Promise((e=>setTimeout(e,n))))}throw null!=i?i:new Error("Failed to connect to streaming server")}))}connectOnce(){return new Promise(((e,t)=>{var s;const n=this.connectionUrl(),i=null!==(s=this.params.connectTimeout)&&void 0!==s?s:1e3;let r,o=!1;const l=e=>{o||(o=!0,r&&clearTimeout(r),this.discardPendingSocket(),t(e))};i>0&&(r=setTimeout((()=>{const e=new v(`Streaming connection timed out after ${i}ms`);e.retryable=!0,l(e)}),i)),this.token?this.socket=a(n.toString()):(console.warn("API key authentication is not supported for the StreamingTranscriber in browser environment. Use temporary token authentication instead.\nLearn more at https://github.com/AssemblyAI/assemblyai-node-sdk/blob/main/docs/compat.md#browser-compatibility."),this.socket=a(n.toString(),{headers:{Authorization:this.apiKey}})),this.socket.binaryType="arraybuffer",this.socket.onopen=()=>{},this.socket.onclose=({code:e,reason:t})=>{var s,n;if(t||e in f&&(t=f[e]),!o){const s=new v(t||`Streaming connection closed (code=${e})`);return s.code=e,s.retryable=x(e),void l(s)}this.flushTimer&&(clearInterval(this.flushTimer),this.flushTimer=void 0),null===(n=(s=this.listeners).close)||void 0===n||n.call(s,e,t)},this.socket.onerror=e=>{var t,s,n;const i=null!==(t=e.error)&&void 0!==t?t:new Error(e.message);if(!o)return i.retryable=!0,void l(i);null===(n=(s=this.listeners).error)||void 0===n||n.call(s,i)},this.socket.onmessage=({data:t})=>{var s,n,i,a,c,h,d,u,m,p,f,g,w,y,k,b,S;const T=JSON.parse(t.toString());if("error"in T){const e=new v(T.error);if("error_code"in T&&(e.code=T.error_code),!o){const t=e;return t.retryable=void 0===e.code||x(e.code),void l(t)}null===(n=(s=this.listeners).error)||void 0===n||n.call(s,e)}else{switch(T.type){case"Begin":A=T,o||(o=!0,r&&clearTimeout(r),e(A)),null===(a=(i=this.listeners).open)||void 0===a||a.call(i,T);break;case"Turn":if(this.isDualChannel&&this.timeline&&this.attributionParams)switch(_(T,this.timeline,{dominanceRatio:this.attributionParams.dominanceRatio}),this.attributionParams.resolveUnknownChannelsMethod){case"window":this.resolveUnknownChannelsByWindow(T);break;case"speaker-history":this.resolveUnknownChannelsBySpeakerHistory(T)}null===(h=(c=this.listeners).turn)||void 0===h||h.call(c,T);break;case"SpeechStarted":null===(u=(d=this.listeners).speechStarted)||void 0===u||u.call(d,T);break;case"LLMGatewayResponse":null===(p=(m=this.listeners).llmGatewayResponse)||void 0===p||p.call(m,T);break;case"SpeakerRevision":null===(g=(f=this.listeners).speakerRevision)||void 0===g||g.call(f,T);break;case"Warning":{const e=T;console.warn(`Streaming warning (code=${e.warning_code}): ${e.warning}`),null===(y=(w=this.listeners).warning)||void 0===y||y.call(w,e);break}case"Heartbeat":null===(b=(k=this.listeners).heartbeat)||void 0===b||b.call(k,T);break;case"Termination":null===(S=this.sessionTerminatedResolve)||void 0===S||S.call(this)}var A}}}))}discardPendingSocket(){if(this.socket){try{this.socket.removeAllListeners&&this.socket.removeAllListeners(),this.socket.close()}catch(e){}this.socket=void 0}}stream(){return new n({write:e=>{this.sendAudio(e)}})}sendAudio(e,t){if(this.isDualChannel){if(!(null==t?void 0:t.channel))throw new Error("StreamingTranscriber is in dual-channel mode; sendAudio requires { channel }.");if(!this.channelNames.includes(t.channel))throw new Error(`Unknown channel "${t.channel}"; declared channels: ${this.channelNames.join(", ")}.`);this.ingestChannelAudio(t.channel,e)}else this.send(e)}ingestChannelAudio(e,t){var s,n;const i=function(e){if(e instanceof Int16Array)return e;if(ArrayBuffer.isView(e)){const t=e;return new Int16Array(t.buffer,t.byteOffset,Math.floor(t.byteLength/2))}return new Int16Array(e)}(t),r=this.channelBuffers.get(e),o=this.channelVadFloatBuffers.get(e);let a=this.channelVadBufferIdx.get(e),l=this.channelSamplesReceived.get(e);const c=this.channelVads.get(e),h=this.params.sampleRate,d=this.vadFrameSamples;for(let t=0;t<i.length;t++){const u=i[t];if(r.push(u),o[a++]=u/32768,l++,a===d){const t=c.process(o),i={ts:l/h*1e3,channel:e,active:t.active,rms:t.energy};this.timeline.pushFrame(i),null===(n=(s=this.listeners).vad)||void 0===n||n.call(s,i),a=0}}this.channelVadBufferIdx.set(e,a),this.channelSamplesReceived.set(e,l),this.flushTimer||this.startFlushTimer()}startFlushTimer(){this.flushTimer=setInterval((()=>this.flushMix()),this.attributionParams.flushIntervalMs)}flushMix(e=!1){var t,s;if(!this.channelNames||!this.channelBuffers)return;const n=this.channelNames.map((e=>this.channelBuffers.get(e))),i=n.length;for(;;){let r=1/0;for(const e of n)e.length<r&&(r=e.length);if(!Number.isFinite(r)||0===r)return;if(!e&&r<this.minChunkSamples)return;r>this.maxChunkSamples&&(r=this.maxChunkSamples);const o=new Int16Array(r);for(let e=0;e<r;e++){let t=0;for(let s=0;s<i;s++)t+=n[s][e];const s=Math.round(t/i);o[e]=s<-32768?-32768:s>32767?32767:s}for(const e of n)e.splice(0,r);try{this.send(o.buffer)}catch(e){return void(null===(s=(t=this.listeners).error)||void 0===s||s.call(t,e))}}}resolveUnknownChannelsByWindow(e){var t;if(!this.attributionParams)return;const s=this.attributionParams.resolutionWindowWords,n=e.words;let i=!1;for(let e=0;e<n.length;e++){if("unknown"!==n[e].channel)continue;const r=new Map,o=Math.max(0,e-s),a=Math.min(n.length-1,e+s);for(let s=o;s<=a;s++){if(s===e)continue;const i=n[s].channel;i&&"unknown"!==i&&r.set(i,(null!==(t=r.get(i))&&void 0!==t?t:0)+1)}if(0===r.size)continue;let l,c=0,h=!1;for(const[e,t]of r)t>c?(l=e,c=t,h=!1):t===c&&(h=!0);l&&!h&&(n[e].channel=l,n[e].channelResolved=!0,i=!0)}i&&(e.channel=S(n))}resolveUnknownChannelsBySpeakerHistory(e){var t;if(!this.timeline||!this.attributionParams||!this.speakerHistory)return;const s=this.attributionParams.speakerHistoryMinRmsEvidence,n=this.attributionParams.speakerHistoryDominanceRatio;for(const s of e.words){if(!s.speaker)continue;const e=this.timeline.framesInWindow(s.start,s.end);let n=this.speakerHistory.get(s.speaker);n||(n=new Map,this.speakerHistory.set(s.speaker,n));for(const s of e)s.active&&n.set(s.channel,(null!==(t=n.get(s.channel))&&void 0!==t?t:0)+s.rms)}let i=!1;for(const t of e.words){if("unknown"!==t.channel||!t.speaker)continue;const e=this.speakerHistory.get(t.speaker);if(!e||0===e.size)continue;let r,o=0,a=0,l=0;for(const[t,s]of e)o+=s,s>a?(l=a,a=s,r=t):s>l&&(l=s);o<s||(l>0&&a<n*l||r&&(t.channel=r,t.channelResolved=!0,i=!0))}i&&(e.channel=S(e.words))}updateConfiguration(e){const{min_end_of_turn_silence_when_confident:t,min_turn_silence:s}=e,n=function(e,t){var s={};for(var n in e)Object.prototype.hasOwnProperty.call(e,n)&&t.indexOf(n)<0&&(s[n]=e[n]);if(null!=e&&"function"==typeof Object.getOwnPropertySymbols){var i=0;for(n=Object.getOwnPropertySymbols(e);i<n.length;i++)t.indexOf(n[i])<0&&Object.prototype.propertyIsEnumerable.call(e,n[i])&&(s[n[i]]=e[n[i]])}return s}(e,["min_end_of_turn_silence_when_confident","min_turn_silence"]);void 0!==t&&(void 0!==s?console.warn("[Deprecation Warning] Both `min_end_of_turn_silence_when_confident` and `min_turn_silence` are set. Using `min_turn_silence`; `min_end_of_turn_silence_when_confident` is deprecated."):console.warn("[Deprecation Warning] `min_end_of_turn_silence_when_confident` is deprecated and will be removed in a future release. Please use `min_turn_silence` instead."));const i=null!=s?s:t,r=Object.assign(Object.assign({type:"UpdateConfiguration"},n),void 0!==i?{min_turn_silence:i}:{});this.send(JSON.stringify(r))}forceEndpoint(){this.send(JSON.stringify({type:"ForceEndpoint"}))}keepAlive(){this.send(JSON.stringify({type:"KeepAlive"}))}send(e){if(!this.socket||this.socket.readyState!==this.socket.OPEN)throw new Error("Socket is not open for communication");this.socket.send(e)}close(){return s(this,arguments,void 0,(function*(e=!0){var t;if(this.flushTimer&&(clearInterval(this.flushTimer),this.flushTimer=void 0,this.flushMix(!0)),this.socket){if(this.socket.readyState===this.socket.OPEN)if(e){const e=new Promise((e=>{this.sessionTerminatedResolve=e}));this.socket.send(T),yield e}else this.socket.send(T);(null===(t=this.socket)||void 0===t?void 0:t.removeAllListeners)&&this.socket.removeAllListeners(),this.socket.close()}this.listeners={},this.socket=void 0}))}}const R={cache:"no-store"};let E="";"undefined"!=typeof navigator&&navigator.userAgent&&(E+=navigator.userAgent);const O={sdk:{name:"JavaScript",version:"4.36.4"}};"undefined"!=typeof process&&(process.versions.node&&-1===E.indexOf("Node")&&(O.runtime_env={name:"Node",version:process.versions.node}),process.versions.bun&&-1===E.indexOf("Bun")&&(O.runtime_env={name:"Bun",version:process.versions.bun})),"undefined"!=typeof Deno&&process.versions.bun&&-1===E.indexOf("Deno")&&(O.runtime_env={name:"Deno",version:Deno.version.deno});class M{constructor(e){var t;this.params=e,!1===e.userAgent?this.userAgent=void 0:this.userAgent=(t=e.userAgent||{},E+(!1===t?"":" AssemblyAI/1.0 ("+Object.entries(Object.assign(Object.assign({},O),t)).map((([e,t])=>t?`${e}=${t.name}/${t.version}`:"")).join(" ")+")"))}fetchResponse(e,t){return s(this,void 0,void 0,(function*(){t=Object.assign(Object.assign({},R),t);let s={Authorization:this.params.apiKey};return t.body instanceof FormData||(s["Content-Type"]="application/json"),(null==R?void 0:R.headers)&&(s=Object.assign(Object.assign({},s),R.headers)),(null==t?void 0:t.headers)&&(s=Object.assign(Object.assign({},s),t.headers)),this.userAgent&&(s["User-Agent"]=this.userAgent,"undefined"!=typeof window&&"chrome"in window&&(s["AssemblyAI-Agent"]=this.userAgent)),t.headers=s,e.startsWith("http")||(e=this.params.baseUrl+e),yield fetch(e,t)}))}fetch(e,t){return s(this,void 0,void 0,(function*(){const s=yield this.fetchResponse(e,t);if(s.status>=400){let e;const t=yield s.text();if(t){try{e=JSON.parse(t)}catch(e){}if(null==e?void 0:e.error)throw new Error(e.error);throw new Error(t)}throw new Error(`HTTP Error: ${s.status} ${s.statusText}`)}return s}))}fetchJson(e,t){return s(this,void 0,void 0,(function*(){return(yield this.fetch(e,t)).json()}))}}class C extends M{constructor(e){super(e),this.baseServiceParams=e}transcriber(e){const t=Object.assign({},e);return t.token||t.apiKey||(t.apiKey=this.baseServiceParams.apiKey),new P(t)}createTemporaryToken(e){return s(this,void 0,void 0,(function*(){const t=new URLSearchParams;Object.entries(e).forEach((([e,s])=>{null!=s&&t.append(e,String(s))}));const s=t.toString(),n=s?`/v3/token?${s}`:"/v3/token";return(yield this.fetchJson(n,{method:"GET"})).token}))}}e.BrowserOnlyError=t,e.DualChannelCapture=class{constructor(e){var s;if(this.running=!1,void 0===globalThis.AudioContext)throw new t;this.params={micStream:e.micStream,systemStream:e.systemStream,transcriber:e.transcriber,targetSampleRate:null!==(s=e.targetSampleRate)&&void 0!==s?s:16e3}}on(e,t){"error"===e&&(this.errorListener=t)}start(){return s(this,void 0,void 0,(function*(){if(this.running)throw new Error("DualChannelCapture already started");this.context=new AudioContext;const e=new Blob(['\nclass Pcm16EncoderProcessor extends AudioWorkletProcessor {\n  constructor(options) {\n    super();\n    const opts = (options && options.processorOptions) || {};\n    this.targetRate = opts.targetRate || 16000;\n    this.chunkMs = opts.chunkMs || 50;\n    this.ratio = sampleRate / this.targetRate;\n    this.chunkSize = Math.round(this.targetRate * this.chunkMs / 1000);\n    this.buffer = new Int16Array(this.chunkSize);\n    this.bufferIdx = 0;\n    this.samplesSent = 0;\n    this.lastSample = 0;\n    this.fractional = 0;\n  }\n\n  process(inputs) {\n    const input = inputs[0];\n    if (!input || input.length === 0 || !input[0] || input[0].length === 0) {\n      return true;\n    }\n    const mono = input[0];\n    let pos = this.fractional;\n    while (pos < mono.length) {\n      const i = Math.floor(pos);\n      const frac = pos - i;\n      const a = i === 0 ? this.lastSample : mono[i - 1];\n      const b = mono[i];\n      const sample = a + (b - a) * frac;\n      const clamped = sample < -1 ? -1 : sample > 1 ? 1 : sample;\n      this.buffer[this.bufferIdx++] = clamped < 0 ? clamped * 0x8000 : clamped * 0x7fff;\n      if (this.bufferIdx === this.chunkSize) {\n        const out = new Int16Array(this.chunkSize);\n        out.set(this.buffer);\n        this.samplesSent += this.chunkSize;\n        this.port.postMessage(\n          { pcm: out.buffer, samplesSent: this.samplesSent },\n          [out.buffer],\n        );\n        this.bufferIdx = 0;\n      }\n      pos += this.ratio;\n    }\n    this.lastSample = mono[mono.length - 1];\n    this.fractional = pos - mono.length;\n    return true;\n  }\n}\nregisterProcessor("aai-pcm16-encoder", Pcm16EncoderProcessor);\n'],{type:"application/javascript"}),t=URL.createObjectURL(e);try{yield this.context.audioWorklet.addModule(t)}finally{URL.revokeObjectURL(t)}this.micSource=this.context.createMediaStreamSource(this.params.micStream),this.sysSource=this.context.createMediaStreamSource(this.params.systemStream),this.micEncoder=this.makeEncoder("mic"),this.sysEncoder=this.makeEncoder("system"),this.micSource.connect(this.micEncoder),this.sysSource.connect(this.sysEncoder),this.running=!0}))}makeEncoder(e){const t=new AudioWorkletNode(this.context,"aai-pcm16-encoder",{numberOfInputs:1,numberOfOutputs:0,channelCount:1,channelCountMode:"explicit",channelInterpretation:"speakers",processorOptions:{targetRate:this.params.targetSampleRate,chunkMs:50}});return t.port.onmessage=t=>{var s;try{this.params.transcriber.sendAudio(t.data.pcm,{channel:e})}catch(e){null===(s=this.errorListener)||void 0===s||s.call(this,e)}},t}stop(){return s(this,void 0,void 0,(function*(){var e,t,s,n,i,r;if(this.running){this.running=!1;try{null===(e=this.micEncoder)||void 0===e||e.port.close(),null===(t=this.sysEncoder)||void 0===t||t.port.close(),null===(s=this.micEncoder)||void 0===s||s.disconnect(),null===(n=this.sysEncoder)||void 0===n||n.disconnect(),null===(i=this.micSource)||void 0===i||i.disconnect(),null===(r=this.sysSource)||void 0===r||r.disconnect()}catch(e){}this.context&&"closed"!==this.context.state&&(yield this.context.close()),this.context=void 0,this.micSource=void 0,this.sysSource=void 0,this.micEncoder=void 0,this.sysEncoder=void 0}}))}},e.EnergyVad=y,e.LinearResampler=class{constructor(e,t){if(this.sourceRate=e,this.targetRate=t,this.lastSample=0,this.fractional=0,e<=0||t<=0)throw new Error("sourceRate and targetRate must be positive");this.ratio=e/t}process(e){var t;if(this.sourceRate===this.targetRate)return e;const s=new Float32Array(Math.ceil(e.length/this.ratio)+1);let n=0,i=this.fractional;for(;i<e.length;){const t=Math.floor(i),r=i-t,o=0===t?this.lastSample:e[t-1],a=e[t];s[n++]=o+(a-o)*r,i+=this.ratio}return this.lastSample=null!==(t=e[e.length-1])&&void 0!==t?t:this.lastSample,this.fractional=i-e.length,s.subarray(0,n)}reset(){this.lastSample=0,this.fractional=0}},e.RealtimeService=class extends w{},e.RealtimeTranscriber=w,e.StreamingServiceFactory=class extends C{},e.StreamingTranscriber=P,e.StreamingTranscriberFactory=C,e.VadTimeline=k,e.attributeTurn=_,e.attributeWord=b,e.float32ToPcm16=function(e){const t=new ArrayBuffer(2*e.length),s=new DataView(t);for(let t=0;t<e.length;t++){const n=Math.max(-1,Math.min(1,e[t]));s.setInt16(2*t,n<0?32768*n:32767*n,!0)}return t},e.rollUpTurnChannel=S}));