getConvolver 获取卷积器

getConvolver

类型: MethodDeclaration

所属类: AudioReverb

定义位置: audio.ts

描述

获取卷积器

返回值:卷积器节点

返回值

类型: ConvolverNode

卷积器节点

源代码

位置: 第 729 行

public static getConvolver(): ConvolverNode {
    if (!AudioReverb.convolver) {
      const PREDELAY = 0.1
      const DECAYTIME = 2
      const context = AudioManager.context
      const duration = PREDELAY + DECAYTIME
      const sampleRate = context.sampleRate
      const sampleCount = Math.round(sampleRate * duration)
      const convolver = context.createConvolver()
      const filter = context.createBiquadFilter()
      const buffer = context.createBuffer(2, sampleCount, sampleRate)
      const bufferLength = buffer.length
      const delayLength = Math.round(bufferLength * PREDELAY / duration)
      const decayLength = Math.round(bufferLength * DECAYTIME / duration)
      const random = Math.random
      for (let i = 0; i < buffer.numberOfChannels; i++) {
        const samples = buffer.getChannelData(i)
        for (let i = 0; i < delayLength; i++) {
          samples[i] = (random() * 2 - 1) * i / delayLength
        }
        for (let i = delayLength; i < bufferLength; i++) {
          const time = (bufferLength - i) / decayLength
          samples[i] = (random() * 2 - 1) * time
        }
      }
      convolver.buffer = buffer
      filter.type = 'lowpass'
      filter.frequency.value = 3000
      convolver.connect(filter)
      filter.connect(context.destination)
      AudioReverb.convolver = convolver
    }
    return AudioReverb.convolver
  }

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文档生成时间：2025/7/21 20:53:39