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feat(webcam): add support for go2rtc webrtc (#1651)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,247 @@ | ||
| <template> | ||
| <div> | ||
| <video | ||
| v-show="status === 'connected'" | ||
| ref="video" | ||
| :style="webcamStyle" | ||
| class="webcamImage" | ||
| autoplay | ||
| playsinline | ||
| muted /> | ||
| <v-row v-if="status !== 'connected'"> | ||
| <v-col class="_webcam_webrtc_output text-center d-flex flex-column justify-center align-center"> | ||
| <v-progress-circular v-if="status === 'connecting'" indeterminate color="primary" class="mb-3" /> | ||
| <span class="mt-3">{{ status }}</span> | ||
| </v-col> | ||
| </v-row> | ||
| </div> | ||
| </template> | ||
|
|
||
| <script lang="ts"> | ||
| import { Component, Mixins, Prop, Ref, Watch } from 'vue-property-decorator' | ||
| import BaseMixin from '@/components/mixins/base' | ||
| import { GuiWebcamStateWebcam } from '@/store/gui/webcams/types' | ||
| import WebcamMixin from '@/components/mixins/webcam' | ||
| @Component | ||
| export default class WebrtcGo2rtc extends Mixins(BaseMixin, WebcamMixin) { | ||
| @Prop({ required: true }) readonly camSettings!: GuiWebcamStateWebcam | ||
| @Prop({ default: null }) readonly printerUrl!: string | null | ||
| @Ref() declare video: HTMLVideoElement | ||
| pc: RTCPeerConnection | null = null | ||
| ws: WebSocket | null = null | ||
| restartPause = 2000 | ||
| restartTimeout: any = null | ||
| status: string = 'connecting' | ||
| mounted() { | ||
| this.start() | ||
| } | ||
| // stop the video and close the streams if the component is going to be destroyed so we don't leave hanging streams | ||
| beforeDestroy() { | ||
| this.terminate() | ||
| // clear any potentially open restart timeout | ||
| if (this.restartTimeout) clearTimeout(this.restartTimeout) | ||
| } | ||
| get webcamStyle() { | ||
| return { | ||
| transform: this.generateTransform( | ||
| this.camSettings.flip_horizontal ?? false, | ||
| this.camSettings.flip_vertical ?? false, | ||
| this.camSettings.rotation ?? 0 | ||
| ), | ||
| } | ||
| } | ||
| get url() { | ||
| let urlSearch = '' | ||
| let url = new URL(location.href) | ||
| try { | ||
| urlSearch = new URL(this.camSettings.stream_url).search.toString() | ||
| url = new URL('api/ws' + urlSearch, this.camSettings.stream_url) | ||
| } catch (e) { | ||
| this.log('invalid url', this.camSettings.stream_url) | ||
| } | ||
| // create media types array | ||
| const media = ['video'] | ||
| if (this.enableAudio) media.push('audio') | ||
| url.searchParams.set('media', media.join('+')) | ||
| // change protocol to ws | ||
| url.protocol = this.$store.state.socket.protocol + ':' | ||
| // output a warning, if no src is set in the url | ||
| if (!url.searchParams.has('src')) { | ||
| this.log('no src set in url') | ||
| } | ||
| return this.convertUrl(url.toString(), this.printerUrl) | ||
| } | ||
| get enableAudio() { | ||
| return this.camSettings.extra_data?.enableAudio ?? false | ||
| } | ||
| // stop and restart the video if the url changes | ||
| @Watch('url') | ||
| changedUrl() { | ||
| this.terminate() | ||
| this.start() | ||
| } | ||
| // stop and restart the video if enableAudio changes | ||
| @Watch('enableAudio') | ||
| changedEnableAudio() { | ||
| this.terminate() | ||
| this.start() | ||
| } | ||
| get expanded(): boolean { | ||
| return this.$store.getters['gui/getPanelExpand']('webcam-panel', this.viewport) ?? false | ||
| } | ||
| // start or stop the video when the expand state changes | ||
| @Watch('expanded', { immediate: true }) | ||
| expandChanged(newExpanded: boolean): void { | ||
| if (!newExpanded) { | ||
| this.terminate() | ||
| return | ||
| } | ||
| this.start() | ||
| } | ||
| log(msg: string, obj?: any) { | ||
| if (obj) { | ||
| window.console.log(`[WebRTC go2rtc] ${msg}`, obj) | ||
| return | ||
| } | ||
| window.console.log(`[WebRTC go2rtc] ${msg}`) | ||
| } | ||
| // webrtc player methods | ||
| // adapted from https://github.com/AlexxIT/go2rtc/blob/master/www/webrtc.html | ||
| start() { | ||
| if (!this.video) { | ||
| this.scheduleRestart() | ||
| return | ||
| } | ||
| this.log('connecting to ' + this.url) | ||
| this.status = 'connecting' | ||
| this.pc = new RTCPeerConnection({ | ||
| iceServers: [{ urls: 'stun:stun.l.google.com:19302' }], | ||
| }) | ||
| let localTracks: MediaStreamTrack[] = [] | ||
| const kinds = ['video', 'audio'] | ||
| kinds.forEach((kind: string) => { | ||
| const track = this.pc?.addTransceiver(kind, { direction: 'recvonly' }).receiver.track | ||
| if (track) localTracks.push(track) | ||
| }) | ||
| this.video.srcObject = new MediaStream(localTracks) | ||
| this.ws = new WebSocket(this.url) | ||
| this.ws.addEventListener('open', () => this.onWebSocketOpen()) | ||
| this.ws.addEventListener('message', (ev) => this.onWebSocketMessage(ev)) | ||
| this.ws.addEventListener('close', (ev) => this.onWebSocketClose(ev)) | ||
| } | ||
| onWebSocketOpen() { | ||
| this.log('open') | ||
| if (this.restartTimeout !== null) { | ||
| clearTimeout(this.restartTimeout) | ||
| this.restartTimeout = null | ||
| } | ||
| this.pc?.addEventListener('icecandidate', (ev) => { | ||
| if (!ev.candidate) return | ||
| const msg = { type: 'webrtc/candidate', value: ev.candidate.candidate } | ||
| this.ws?.send(JSON.stringify(msg)) | ||
| }) | ||
| this.pc?.addEventListener('connectionstatechange', () => { | ||
| this.status = (this.pc?.connectionState ?? '').toString() | ||
| this.log('connection state changed', this.status) | ||
| if (['failed', 'disconnected'].includes(this.status)) { | ||
| this.scheduleRestart() | ||
| } | ||
| }) | ||
| this.pc | ||
| ?.createOffer() | ||
| .then((offer) => this.pc?.setLocalDescription(offer)) | ||
| .then(() => { | ||
| const msg = { type: 'webrtc/offer', value: this.pc?.localDescription?.sdp } | ||
| this.ws?.send(JSON.stringify(msg)) | ||
| }) | ||
| } | ||
| onWebSocketMessage(ev: MessageEvent) { | ||
| const msg = JSON.parse(ev.data) | ||
| if (msg.type === 'webrtc/candidate') { | ||
| this.pc?.addIceCandidate({ candidate: msg.value, sdpMid: '0' }) | ||
| } else if (msg.type === 'webrtc/answer') { | ||
| this.pc?.setRemoteDescription({ type: 'answer', sdp: msg.value }) | ||
| } | ||
| } | ||
| onWebSocketClose(ev: CloseEvent) { | ||
| this.log('close') | ||
| this.status = 'disconnected' | ||
| if (!ev.wasClean) this.scheduleRestart() | ||
| } | ||
| terminate() { | ||
| this.log('terminating') | ||
| if (this.pc !== null) { | ||
| this.pc.close() | ||
| this.pc = null | ||
| } | ||
| if (this.ws !== null) { | ||
| this.ws.close() | ||
| this.ws = null | ||
| } | ||
| } | ||
| scheduleRestart() { | ||
| if (this.restartTimeout !== null) return | ||
| this.terminate() | ||
| this.restartTimeout = window.setTimeout(() => { | ||
| this.restartTimeout = null | ||
| this.start() | ||
| }, this.restartPause) | ||
| } | ||
| } | ||
| </script> | ||
|
|
||
| <style scoped> | ||
| .webcamImage { | ||
| width: 100%; | ||
| } | ||
| ._webcam_webrtc_output { | ||
| aspect-ratio: calc(3 / 2); | ||
| } | ||
| video { | ||
| width: 100%; | ||
| } | ||
| </style> |
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