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feat: popular page add quality filter, dimension filter
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| import { IVideoSubFilter } from '../core' | ||
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| class DimensionFilter implements IVideoSubFilter { | ||
| isEnable = false | ||
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| setStatus(status: boolean) { | ||
| this.isEnable = status | ||
| } | ||
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| check(dimension: boolean): Promise<string> { | ||
| return new Promise<string>((resolve, reject) => { | ||
| if (!this.isEnable) { | ||
| resolve(`Dimension filter disable`) | ||
| } else { | ||
| if (dimension) { | ||
| resolve(`Dimension is horizontal`) | ||
| } else { | ||
| reject(`Dimension is vertical`) | ||
| } | ||
| } | ||
| }) | ||
| } | ||
| } | ||
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| // 单例 | ||
| const dimensionFilterInstance = new DimensionFilter() | ||
| export default dimensionFilterInstance |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| import { IVideoSubFilter } from '../core' | ||
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| class QualityFilter implements IVideoSubFilter { | ||
| // 质量过滤阈值 | ||
| private threshold = 0 | ||
| isEnable = false | ||
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| setStatus(status: boolean) { | ||
| this.isEnable = status | ||
| } | ||
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| setParams(threshold: number) { | ||
| this.threshold = threshold | ||
| } | ||
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| // 根据coinLikeRatio计算视频质量, 参数源于爬虫数据拟合 | ||
| calcQuality = (ratio: number): number => { | ||
| const A = -1.201e1 | ||
| const B = 6.861e-1 | ||
| const C = 7.369e-2 | ||
| const D = 1.192e2 | ||
| const ans = (A - D) / (1 + Math.pow(ratio / C, B)) + D | ||
| return ans > 0 ? ans : 0 | ||
| } | ||
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| check(ratio: number): Promise<string> { | ||
| return new Promise<string>((resolve, reject) => { | ||
| if (!this.isEnable || this.threshold === 0) { | ||
| resolve(`Quality resolve, disable or 0`) | ||
| } else { | ||
| const score = this.calcQuality(ratio) | ||
| if (score > 0 && score > this.threshold) { | ||
| resolve(`Quality OK`) | ||
| } else { | ||
| reject(`Quality too bad`) | ||
| } | ||
| } | ||
| }) | ||
| } | ||
| } | ||
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| // 单例 | ||
| const qualityFilterInstance = new QualityFilter() | ||
| export default qualityFilterInstance |
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