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feat: (xgplayer-flv) update download speed evaluate strategy
feat: (xgplayer-flv) export configuration for speed evaluate fix: (xgplayer-flv) seamless switch error case canplay、playing event emit again feat: (xgplayer-flv) export totalSize、 totalCost for speedInfo()
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98 changes: 88 additions & 10 deletions
98
packages/xgplayer-streaming-shared/src/services/bandwidth.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,37 +1,115 @@ | ||
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| const SKIP_SMALL_CHUNK = 1000 | ||
| const MAX_CHUNK_SAVE_SIZE = 50 | ||
| const MAX_SEGMENT_SAVE_SIZE = 3 | ||
| const LONGTIME_NO_RECEIVE = 3000 | ||
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| export class BandwidthService { | ||
| _chunkSpeeds = [] // bps | ||
| _chunkSpeed = 0 // bps | ||
| _chunkCache = [] | ||
| _speeds = [] // bps | ||
| _totalSize = 0 | ||
| _totalCost = 0 | ||
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| /** | ||
| * @typedef {{ | ||
| * chunkCountForSpeed?: number, | ||
| * skipChunkSize?: number, | ||
| * longtimeNoReceived?: number | ||
| * }} Opts | ||
| * | ||
| * @param {Opts} opts | ||
| */ | ||
| constructor (opts) { | ||
| this._opts = opts || {} | ||
| } | ||
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| addRecord (totalByte, ms) { | ||
| if (!totalByte || !ms) return | ||
| this._speeds.push(8000 * totalByte / ms) | ||
| this._speeds = this._speeds.slice(-3) | ||
| this._speeds = this._speeds.slice(-MAX_SEGMENT_SAVE_SIZE) | ||
| } | ||
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| addChunkRecord (totalByte, ms) { | ||
| if (!totalByte || !ms) return | ||
| this._chunkSpeeds.push(8000 * totalByte / ms) | ||
| this._chunkSpeeds = this._chunkSpeeds.slice(-100) | ||
| if (!totalByte || !ms || totalByte < (this._opts?.skipChunkSize || SKIP_SMALL_CHUNK)) return | ||
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| this._totalSize += totalByte | ||
| this._totalCost += ms | ||
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| this._chunkSpeed = 8000 * totalByte / ms | ||
| this._chunkCache.push({ | ||
| size: totalByte, | ||
| duration: ms, | ||
| timestamp: performance.now() | ||
| }) | ||
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| const size = this._opts?.chunkCountForSpeed || MAX_CHUNK_SAVE_SIZE | ||
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| if (this._chunkCache.length > size) { | ||
| this._chunkCache = this._chunkCache.slice(-size) | ||
| } | ||
| } | ||
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| /** | ||
| * | ||
| * @returns { number } | ||
| */ | ||
| getAvgSpeed () { | ||
| if (!this._chunkSpeeds.length && !this._speeds.length) return 0 | ||
| if (!this._chunkCache.length && !this._speeds.length) return 0 | ||
| if (this._speeds.length) { | ||
| return this._speeds.reduce((a, c) => (a += c)) / this._speeds.length | ||
| } | ||
| return this._chunkSpeeds.reduce((a, c) => (a += c)) / this._chunkSpeeds.length | ||
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| // for long time no chunk received, append 0 size chunk | ||
| const lastSample = this._chunkCache[this._chunkCache.length - 1] | ||
| const cost = performance.now() - lastSample.timestamp | ||
| if ( cost > (this._opts?.longtimeNoReceived || LONGTIME_NO_RECEIVE)) { | ||
| this._chunkCache.push({ | ||
| size: 0, | ||
| duration: cost, | ||
| timestamp: performance.now() | ||
| }) | ||
| } | ||
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| const totalSize = this._chunkCache.reduce((a, c) => a += c.size, 0) | ||
| const totalDuration = this._chunkCache.reduce((a, c) => a += c.duration, 0) | ||
| return 8000 * totalSize / totalDuration | ||
| } | ||
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| /** | ||
| * | ||
| * @returns { number } | ||
| */ | ||
| getLatestSpeed () { | ||
| if (!this._chunkSpeeds.length && !this._speeds.length) return 0 | ||
| if (!this._chunkCache.length && !this._speeds.length) return 0 | ||
| if (this._speeds.length) { | ||
| return this._speeds[this._speeds.length - 1] | ||
| } | ||
| return this._chunkSpeeds[this._chunkSpeeds.length - 1] | ||
| return this._chunkSpeed | ||
| } | ||
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| /** | ||
| * | ||
| * @returns { number } | ||
| */ | ||
| getTotalSize () { | ||
| return this._totalSize | ||
| } | ||
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| /** | ||
| * | ||
| * @returns { number } | ||
| */ | ||
| getTotalCost () { | ||
| return this._totalCost | ||
| } | ||
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| reset () { | ||
| this._chunkSpeeds = [] | ||
| this._chunkCache = [] | ||
| this._speeds = [] | ||
| this._totalSize = 0 | ||
| this._totalCost = 0 | ||
| } | ||
| } | ||
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