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fix: prevent integer overflow in AudioSourceFactory frame count calculation #813

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fix: prevent integer overflow in AudioSourceFactory frame count calculation #813

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4 changes: 3 additions & 1 deletion Sources/FluidAudio/Shared/AudioSourceFactory.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -135,7 +135,9 @@ public struct AudioSourceFactory {
}

do {
let remainingFrames = AVAudioFrameCount(audioFile.length - audioFile.framePosition)
// Clamp to AVAudioFrameCount.max to prevent overflow when casting from Int64
let remainingFramesInt64 = audioFile.length - audioFile.framePosition
let remainingFrames = AVAudioFrameCount(min(remainingFramesInt64, Int64(AVAudioFrameCount.max)))
let framesToRead = min(inputCapacity, remainingFrames)
if framesToRead > 0 {
try audioFile.read(into: capturedInputBuffer, frameCount: framesToRead)
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