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update with various deepgram fixes, including for #700

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This commit is contained in:
Dave Horton
2024-04-01 13:03:52 -04:00
parent ec58232b61
commit e1497f90a8
1 changed files with 80 additions and 21 deletions
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89
lib/tasks/transcribe.js
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@@ -303,12 +303,12 @@ class TaskTranscribe extends SttTask {
async _onTranscription(cs, ep, channel, evt, fsEvent) {
// make sure this is not a transcript from answering machine detection
const bugname = fsEvent.getHeader('media-bugname');
const finished = fsEvent.getHeader('transcription-session-finished');
if (bugname && this.bugname !== bugname) return;
if (this.paused) {
this.logger.debug({evt}, 'TaskTranscribe:_onTranscription - paused, ignoring transcript');
}
if (this.vendor === 'ibm' && evt?.state === 'listening') return;
if (this.vendor === 'deepgram' && evt.type === 'UtteranceEnd') {
@@ -319,8 +319,9 @@ class TaskTranscribe extends SttTask {
else {
this.logger.debug('Gather:_onTranscription - got UtteranceEnd event from deepgram, return buffered transcript');
evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language, this.vendor);
evt.is_final = true;
this._bufferedTranscripts = [];
this._resolve('speech', evt);
this._resolve(channel, evt);
}
return;
}
@@ -334,31 +335,89 @@ class TaskTranscribe extends SttTask {
return;
}
if (evt.alternatives[0]?.transcript === '' && !cs.callGone && !this.killed) {
if (['microsoft', 'deepgram'].includes(this.vendor)) {
this.logger.info({evt}, 'TaskTranscribe:_onTranscription - got empty transcript, continue listening');
}
else {
this.logger.info({evt}, 'TaskTranscribe:_onTranscription - got empty transcript, listen again');
this._transcribe(ep);
}
let emptyTranscript = false;
if (evt.is_final) {
if (evt.alternatives[0].transcript === '' && !cs.callGone && !this.killed) {
emptyTranscript = true;
if (finished === 'true' &&
['microsoft', 'deepgram'].includes(this.vendor) &&
this._bufferedTranscripts.length === 0) {
this.logger.debug({evt}, 'TaskGather:_onTranscription - got empty transcript from old gather, disregarding');
return;
}
else if (this.vendor !== 'deepgram') {
this.logger.info({evt}, 'TaskGather:_onTranscription - got empty transcript, continue listening');
return;
}
else if (this.isContinuousAsr) {
this.logger.info({evt},
'TaskGather:_onTranscription - got empty deepgram transcript during continous asr, continue listening');
return;
}
else if (this.vendor === 'deepgram' && this._bufferedTranscripts.length > 0) {
this.logger.info({evt},
'TaskGather:_onTranscription - got empty transcript from deepgram, return the buffered transcripts');
}
}
if (this.isContinuousAsr) {
/* append the transcript and start listening again for asrTimeout */
const t = evt.alternatives[0].transcript;
if (t) {
/* remove trailing punctuation */
if (/[,;:\.!\?]$/.test(t)) {
this.logger.debug('TaskGather:_onTranscription - removing trailing punctuation');
evt.alternatives[0].transcript = t.slice(0, -1);
}
}
this.logger.info({evt}, 'TaskGather:_onTranscription - got transcript during continous asr');
this._bufferedTranscripts.push(evt);
this._startAsrTimer(channel);
/* some STT engines will keep listening after a final response, so no need to restart */
if (!['soniox', 'aws', 'microsoft', 'deepgram', 'google']
.includes(this.vendor)) this._startTranscribing(cs, ep, channel);
}
else {
if (this.vendor === 'soniox') {
/* compile transcripts into one */
this._sonioxTranscripts.push(evt.vendor.finalWords);
if (evt.is_final) {
evt = this.compileSonioxTranscripts(this._sonioxTranscripts, 1, this.language);
this._sonioxTranscripts = [];
}
else if (this.vendor === 'deepgram') {
/* compile transcripts into one */
if (!emptyTranscript) this._bufferedTranscripts.push(evt);
/* deepgram can send an empty and final transcript; only if we have any buffered should we resolve */
if (this._bufferedTranscripts.length === 0) return;
evt = this.consolidateTranscripts(this._bufferedTranscripts, channel, this.language);
this._bufferedTranscripts = [];
}
if (this.isContinuousAsr && evt.is_final) {
/* here is where we return a final transcript */
this.logger.debug({evt}, 'TaskTranscribe:_onTranscription - sending final transcript');
this._resolve(channel, evt);
/* some STT engines will keep listening after a final response, so no need to restart */
if (!['soniox', 'aws', 'microsoft', 'deepgram', 'google']
.includes(this.vendor)) this._startTranscribing(cs, ep, channel);
}
}
else {
/* interim transcript */
/* deepgram can send a non-final transcript but with words that are final, so we need to buffer */
if (this.vendor === 'deepgram') {
const originalEvent = evt.vendor.evt;
if (originalEvent.is_final && evt.alternatives[0].transcript !== '') {
this.logger.debug({evt}, 'Gather:_onTranscription - buffering a completed (partial) deepgram transcript');
this._bufferedTranscripts.push(evt);
this._startAsrTimer(channel);
} else {
await this._resolve(channel, evt);
}
}
if (this.interim) {
this.logger.debug({evt}, 'TaskTranscribe:_onTranscription - sending interim transcript');
this._resolve(channel, evt);
}
}
}