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#4094 - Fix crash on concurrent access to waveform audio samples.

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This commit is contained in:
Stefan Ceriu
2021-07-12 15:31:18 +03:00
parent 648eea312c
commit 9013fcb59f
1 changed files with 2 additions and 2 deletions
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Riot/Modules/Room/VoiceMessages/VoiceMessageWaveformView.swift
+2 -2
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@@ -82,7 +82,7 @@ class VoiceMessageWaveformView: UIView {
// MARK: - Private
private func computeWaveForm() {
renderingQueue.async {
renderingQueue.async { [samples] in // Capture the current samples as a way to provide atomicity
let path = UIBezierPath()
let drawMappingFactor = self.bounds.size.height
@@ -92,7 +92,7 @@ class VoiceMessageWaveformView: UIView {
var index = 0
while xOffset < self.bounds.width - self.lineWidth {
let sample = CGFloat(index >= self.samples.count ? 1 : self.samples[index])
let sample = CGFloat(index >= samples.count ? 1 : samples[index])
let invertedDbSample = 1 - sample // sample is in dB, linearly normalized to [0, 1] (1 -> -50 dB)
let drawingAmplitude = max(minimumGraphAmplitude, invertedDbSample * drawMappingFactor)