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Always trigger the first amplitude capture from the worklet

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Fixes https://github.com/vector-im/element-web/issues/18587

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This commit is contained in:
Travis Ralston 2021-08-26 15:47:49 -06:00
parent 470bc0ffe7
commit 289b1c5ce0
1 changed files with 7 additions and 1 deletions
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8
src/audio/RecorderWorklet.ts
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@ -45,7 +45,13 @@ class MxVoiceWorklet extends AudioWorkletProcessor {
process(inputs, outputs, parameters) {
const currentSecond = roundTimeToTargetFreq(currentTime);
if (currentSecond === this.nextAmplitudeSecond) {
// We special case the first ping because there's a fairly good chance that we'll miss the zeroth
// update. Firefox for instance takes 0.06 seconds (roughly) to call this function for the first
// time. Edge and Chrome occasionally lag behind too, but for the most part are on time.
//
// When this doesn't work properly we end up producing a waveform of nulls and no live preview
// of the recorded message.
if (currentSecond === this.nextAmplitudeSecond || this.nextAmplitudeSecond === 0) {
// We're expecting exactly one mono input source, so just grab the very first frame of
// samples for the analysis.
const monoChan = inputs[0][0];