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<template> | ||
<div class="canvas-container"> | ||
<canvas ref="canvasRef" :width="width" :height="height"></canvas> | ||
</div> | ||
</template> | ||
|
||
<script lang="ts" setup> | ||
import { WebRTCStats } from '@peermetrics/webrtc-stats' | ||
import { onMounted, onUnmounted, ref, watch } from 'vue' | ||
import { useVideoStore } from '@/stores/video' | ||
import { WebRTCStatsEvent } from '@/types/video' | ||
const videoStore = useVideoStore() | ||
const props = defineProps({ | ||
width: { | ||
type: Number, | ||
default: 130, | ||
}, | ||
height: { | ||
type: Number, | ||
default: 200, | ||
}, | ||
updateInterval: { | ||
type: Number, | ||
default: 20, | ||
}, | ||
streamName: { | ||
type: String, | ||
default: '', | ||
}, | ||
}) | ||
const canvasRef = ref(null) | ||
const framerateData = ref([]) | ||
const bitrateData = ref([]) | ||
let animationFrameId = null | ||
let intervalId = null | ||
let bitrate = 0 | ||
// cumulative values | ||
let packetsLost = 0 | ||
let packetsReceived = 0 | ||
let totalProcessingDelay = 0 | ||
let nackCount = 0 | ||
let pliCount = 0 | ||
let firCount = 0 | ||
let framesReceived = 0 | ||
let connectionLost = false | ||
let processingDelayDelta = 0 | ||
let freezes = 0 | ||
let frozenTime = 0 | ||
let framedrops = 0 | ||
let packetLossPercentage = 0 | ||
let framerate = 0 | ||
let videoHeight = 0 | ||
const maxDataPoints = 100 | ||
let maxBitrateReceived = 1000 // max bitrate received, used for scaling the plot | ||
let maxFramerateReceived = 30 // max framerate received, used for scaling the plot | ||
let absoluteMaxFrameRate = 120 // Absolute maximum framerate, used for dealing with outliers | ||
const plotHeight = 60 // Height of the plot area | ||
/** | ||
* Normalize the value to fit the plot area | ||
* @param {number} value - The current value | ||
* @param {number} max - The maximum value currently in the plot | ||
* @returns {number} The normalized value | ||
*/ | ||
function normalizeValue(value: number, max: number): number { | ||
return (value / max) * plotHeight | ||
} | ||
/** | ||
* Draw the line plots and stats | ||
*/ | ||
function draw(): void { | ||
const canvas = canvasRef.value | ||
const ctx = canvas.getContext('2d') | ||
const { width, height } = props | ||
ctx.clearRect(0, 0, width, height) | ||
// Draw bitrate plot | ||
ctx.strokeStyle = 'rgb(255, 165, 0)' // Orange | ||
ctx.lineWidth = 1 | ||
ctx.beginPath() | ||
for (let i = 0; i < bitrateData.value.length; i++) { | ||
const x = (i / (maxDataPoints - 1)) * width | ||
const y = height - normalizeValue(bitrateData.value[i], maxBitrateReceived) | ||
if (i === 0) ctx.moveTo(x, y) | ||
else ctx.lineTo(x, y) | ||
} | ||
ctx.stroke() | ||
// Draw framerate plot | ||
ctx.strokeStyle = 'rgb(0, 255, 0)' // Green | ||
ctx.beginPath() | ||
for (let i = 0; i < framerateData.value.length; i++) { | ||
const x = (i / (maxDataPoints - 1)) * width | ||
const y = height - normalizeValue(framerateData.value[i], maxFramerateReceived) | ||
if (i === 0) ctx.moveTo(x, y) | ||
else ctx.lineTo(x, y) | ||
} | ||
ctx.stroke() | ||
// Print text stats | ||
const color = connectionLost ? 'red' : 'white' | ||
const stats = [ | ||
{ label: 'Stream', value: props.streamName, color: color }, | ||
{ label: 'Size', value: videoHeight ? `${videoHeight}p` : 'N/A', color: color }, | ||
{ label: 'Packets Lost', value: `${packetsLost} (${packetLossPercentage.toFixed(0)}%)`, color: color }, | ||
{ label: 'Frame drops', value: framedrops, color: color }, | ||
{ label: 'Nack', value: nackCount, color: color }, | ||
{ label: 'Pli', value: pliCount, color: color }, | ||
{ label: 'Fir', value: firCount, color: color }, | ||
{ label: 'Processing ', value: `${processingDelayDelta.toFixed(0)}ms`, color: color }, | ||
{ label: 'Freezes', value: `${freezes}(${frozenTime.toFixed(1)}s)`, color: color }, | ||
{ label: 'Bitrate', value: `${bitrate.toFixed(0)}kbps`, color: 'rgb(255, 165, 0)' }, | ||
{ label: 'FPS', value: framerate.toFixed(2), color: 'rgb(0, 255, 0)' }, | ||
] | ||
ctx.font = '10px Arial' | ||
stats.forEach((stat, index) => { | ||
ctx.fillStyle = stat.color | ||
ctx.fillText(`${stat.label}: ${stat.value}`, 5, 12 + index * 12) | ||
}) | ||
animationFrameId = requestAnimationFrame(draw) | ||
} | ||
const webrtcStats = new WebRTCStats({ getStatsInterval: 100 }) | ||
/** | ||
* Draws the lines and updates the stats | ||
*/ | ||
function update(): void { | ||
framerateData.value.push(framerate) | ||
bitrateData.value.push(bitrate) | ||
if (framerateData.value.length > maxDataPoints) framerateData.value.shift() | ||
if (bitrateData.value.length > maxDataPoints) bitrateData.value.shift() | ||
// Update max values | ||
maxBitrateReceived = Math.max(maxBitrateReceived, ...bitrateData.value) | ||
maxFramerateReceived = Math.max(maxFramerateReceived, ...framerateData.value) | ||
if (maxFramerateReceived > absoluteMaxFrameRate) maxFramerateReceived = absoluteMaxFrameRate | ||
} | ||
watch(videoStore.activeStreams, (streams): void => { | ||
Object.keys(streams).forEach((streamName) => { | ||
if (streamName !== props.streamName) return | ||
const session = streams[streamName]?.webRtcManager.session | ||
if (!session || !session.peerConnection) return | ||
if (webrtcStats.peersToMonitor[session.consumerId]) return | ||
webrtcStats.addConnection({ | ||
pc: session.peerConnection, | ||
peerId: session.consumerId, | ||
connectionId: session.id, | ||
remote: false, | ||
}) | ||
}) | ||
}) | ||
onMounted(() => { | ||
intervalId = setInterval(update, props.updateInterval) | ||
draw() | ||
webrtcStats.on('stats', (ev: WebRTCStatsEvent) => { | ||
try { | ||
const videoData = ev.data.video.inbound[0] | ||
if (videoData === undefined) return | ||
connectionLost = videoData.bitrate === 0 | ||
if (!isNaN(videoData.bitrate)) { | ||
const newBitrate = videoData.bitrate / 1000 | ||
bitrate = bitrate * 0.8 + newBitrate * 0.2 | ||
} | ||
packetsLost = videoData.packetsLost | ||
nackCount = videoData.nackCount | ||
pliCount = videoData.pliCount | ||
firCount = videoData.firCount | ||
packetsReceived = videoData.packetsReceived | ||
let totalProcessingDelayDelta = videoData.totalProcessingDelay - totalProcessingDelay | ||
let framesDelta = videoData.framesReceived - framesReceived | ||
processingDelayDelta = (1000 * totalProcessingDelayDelta) / framesDelta | ||
framesReceived = videoData.framesReceived | ||
totalProcessingDelay = videoData.totalProcessingDelay | ||
packetLossPercentage = (packetsLost / (packetsLost + packetsReceived)) * 100 | ||
freezes = videoData.freezeCount | ||
frozenTime = videoData.totalFreezesDuration | ||
framedrops = videoData.framesDropped | ||
framerate = videoData.framesPerSecond ?? 0 | ||
videoHeight = videoData.frameHeight | ||
} catch (e) { | ||
console.error(e) | ||
} | ||
}) | ||
}) | ||
onUnmounted(() => { | ||
clearInterval(intervalId) | ||
cancelAnimationFrame(animationFrameId) | ||
}) | ||
</script> | ||
|
||
<style scoped> | ||
.canvas-container { | ||
position: absolute; | ||
top: 50px; | ||
left: 10px; | ||
background-color: rgba(0, 0, 0, 0.5); | ||
z-index: 2; | ||
} | ||
</style> |
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