Early stopping checks for CLI

[ZachNagengast]

Similar to the example app, we should bring over the options for early stopping and add CLI arguments for setting them.

WhisperKit/Examples/WhisperAX/WhisperAX/Views/ContentView.swift

Lines 1040 to 1069 in 0f19f7e

	// Early stopping checks
	let decodingCallback: ((TranscriptionProgress) -> Bool?) = { progress in
	DispatchQueue.main.async {
	let fallbacks = Int(progress.timings.totalDecodingFallbacks)
	if progress.text.count < currentText.count {
	if fallbacks == self.currentFallbacks {
	self.unconfirmedText.append(currentText)
	} else {
	print("Fallback occured: \(fallbacks)")
	}
	}
	self.currentText = progress.text
	self.currentFallbacks = fallbacks
	}
	// Check early stopping
	let currentTokens = progress.tokens
	let checkWindow = Int(compressionCheckWindow)
	if currentTokens.count > checkWindow {
	let checkTokens: [Int] = currentTokens.suffix(checkWindow)
	let compressionRatio = compressionRatio(of: checkTokens)
	if compressionRatio > options.compressionRatioThreshold! {
	return false
	}
	}
	if progress.avgLogprob! < options.logProbThreshold! {
	return false
	}
	return nil
	}

[atiorh]

Indeed, we will aim for parity between the WhisperAX sample app and the CLI before the stable release.