Keep export progress monotonic during resampling

Author: entrepeneur4lyf

web/app.js

@@ -1419,24 +1419,24 @@ async function processAudio() {
           throw new Error('Cancelled');
         }
 
+        const needsResample = result.audioBuffer.sampleRate !== parsedSampleRate;
         let exportBuffer = result.audioBuffer;
-        if (exportBuffer.sampleRate !== parsedSampleRate) {
-          updateProgress(83, `Resampling to ${parsedSampleRate / 1000}kHz...`);
-        let exportBuffer = result.audioBuffer;
-        if (exportBuffer.sampleRate !== parsedSampleRate) {
+        if (needsResample) {
           updateProgress(86, `Resampling to ${parsedSampleRate / 1000}kHz...`);
           exportBuffer = await resampleAudioBuffer(exportBuffer, parsedSampleRate);
         }
         if (processingCancelled) {
           throw new Error('Cancelled');
         }
 
-        updateProgress(88, 'Encoding WAV...');
+        const encodeProgressStart = needsResample ? 86 : 85;
+        const encodeProgressSpan = needsResample ? 9 : 10;
+        updateProgress(encodeProgressStart, 'Encoding WAV...');
         // Yield so the UI can repaint before encoding begins.
         await new Promise(resolve => setTimeout(resolve, 0));
 
         outputData = await encodeWAVAsync(exportBuffer, parsedSampleRate, parsedBitDepth, {
-          onProgress: (p) => updateProgress(Math.round(88 + p * 10), 'Encoding WAV...'),
+          onProgress: (p) => updateProgress(Math.round(encodeProgressStart + p * encodeProgressSpan), 'Encoding WAV...'),
           shouldCancel: () => processingCancelled
         });
       } catch (workerErr) {