Mercurial
annotate dictation/web/dictation.js @ 275:78699f810817
Add Qwen3-VL and WebRTC dictation services
Add Bazel targets for the CUDA-backed Qwen3-VL server and a local WebRTC faster-whisper dictation service.
Co-authored-by: Copilot <[email protected]>
Copilot-Session: e3d8cb06-6c95-4ae0-9757-651d3796ab00
| author | MrJuneJune <me@mrjunejune.com> |
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| date | Mon, 17 Aug 2026 10:58:47 -0700 |
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| children | 49e9e591c9bb |
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1 const startButton = document.querySelector("[data-start]"); |
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2 const stopButton = document.querySelector("[data-stop]"); |
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3 const status = document.querySelector("[data-status]"); |
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4 const partial = document.querySelector("[data-partial]"); |
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5 const finalText = document.querySelector("[data-final]"); |
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6 |
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7 let peer = null; |
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8 let channel = null; |
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9 let stream = null; |
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10 let sessionId = null; |
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11 let stopResolver = null; |
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12 |
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13 function setStatus(message, state = "") { |
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14 status.textContent = message; |
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15 status.dataset.state = state; |
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16 } |
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17 |
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18 function waitForIceGathering(connection) { |
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19 if (connection.iceGatheringState === "complete") return Promise.resolve(); |
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20 return new Promise(resolve => { |
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21 const listener = () => { |
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22 if (connection.iceGatheringState !== "complete") return; |
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23 connection.removeEventListener("icegatheringstatechange", listener); |
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24 resolve(); |
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25 }; |
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26 connection.addEventListener("icegatheringstatechange", listener); |
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27 }); |
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28 } |
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29 |
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30 function handleTranscript(message) { |
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31 let event; |
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32 try { |
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33 event = JSON.parse(message.data); |
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34 } catch { |
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35 setStatus("Received an invalid server event", "error"); |
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36 return; |
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37 } |
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38 switch (event.type) { |
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39 case "ready": |
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40 setStatus("Listening", "ready"); |
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41 break; |
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42 case "speech.started": |
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43 setStatus("Speech detected", "working"); |
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44 break; |
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45 case "transcript.partial": |
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46 partial.textContent = event.text; |
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47 break; |
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48 case "transcript.final": |
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49 finalText.value += `${finalText.value ? " " : ""}${event.text}`; |
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50 partial.textContent = "Waiting for speech..."; |
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51 break; |
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52 case "speech.ended": |
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53 setStatus("Listening", "ready"); |
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54 stopResolver?.(); |
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55 stopResolver = null; |
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56 break; |
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57 case "error": |
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58 setStatus(event.message || "Transcription failed", "error"); |
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59 break; |
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60 } |
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61 } |
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62 |
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63 async function start() { |
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64 if (peer) return; |
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65 startButton.disabled = true; |
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66 setStatus("Requesting microphone access...", "working"); |
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67 try { |
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68 stream = await navigator.mediaDevices.getUserMedia({ |
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69 audio: { |
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70 channelCount: 1, |
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71 echoCancellation: true, |
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72 noiseSuppression: true, |
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73 }, |
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74 video: false, |
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75 }); |
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76 peer = new RTCPeerConnection(); |
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77 channel = peer.createDataChannel("transcripts", { ordered: true }); |
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78 channel.addEventListener("message", handleTranscript); |
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79 channel.addEventListener("close", () => { |
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80 if (peer) setStatus("Transcript channel closed", "error"); |
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81 }); |
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82 peer.addEventListener("connectionstatechange", () => { |
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83 if (peer?.connectionState === "failed") { |
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84 setStatus("WebRTC connection failed", "error"); |
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85 void stop(); |
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86 } |
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87 }); |
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88 for (const track of stream.getTracks()) peer.addTrack(track, stream); |
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89 |
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90 const offer = await peer.createOffer(); |
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91 await peer.setLocalDescription(offer); |
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92 await waitForIceGathering(peer); |
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93 const response = await fetch("/api/webrtc/offer", { |
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94 method: "POST", |
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95 headers: { "Content-Type": "application/json" }, |
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96 body: JSON.stringify(peer.localDescription), |
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97 }); |
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98 if (!response.ok) { |
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99 const detail = await response.text(); |
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100 throw new Error(`Signaling failed (${response.status}): ${detail}`); |
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101 } |
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102 const answer = await response.json(); |
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103 sessionId = answer.sessionId; |
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104 await peer.setRemoteDescription({ |
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105 sdp: answer.sdp, |
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106 type: answer.type, |
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107 }); |
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108 stopButton.disabled = false; |
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109 setStatus("Connecting...", "working"); |
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110 } catch (error) { |
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111 setStatus(error.message || "Unable to start dictation", "error"); |
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112 await stop(); |
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113 } |
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114 } |
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115 |
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116 async function stop(waitForFinal = true) { |
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117 const closingSession = sessionId; |
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118 sessionId = null; |
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119 const tracks = stream?.getTracks() || []; |
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120 if (channel?.readyState === "open" && waitForFinal) { |
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121 const ended = new Promise(resolve => { |
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122 stopResolver = resolve; |
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123 }); |
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124 channel.send("stop"); |
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125 for (const track of tracks) track.enabled = false; |
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126 await Promise.race([ |
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127 ended, |
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128 new Promise(resolve => window.setTimeout(resolve, 10000)), |
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129 ]); |
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130 stopResolver = null; |
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131 } |
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132 for (const track of tracks) track.stop(); |
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133 stream = null; |
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134 channel?.close(); |
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135 channel = null; |
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136 peer?.close(); |
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137 peer = null; |
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138 if (closingSession) { |
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139 await fetch(`/api/webrtc/session/${encodeURIComponent(closingSession)}/close`, { |
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140 method: "POST", |
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141 keepalive: true, |
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142 }).catch(() => {}); |
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143 } |
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144 startButton.disabled = false; |
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145 stopButton.disabled = true; |
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146 setStatus("Idle"); |
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147 } |
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148 |
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149 startButton.addEventListener("click", () => void start()); |
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150 stopButton.addEventListener("click", () => void stop()); |
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151 window.addEventListener("pagehide", () => void stop(false)); |