Normalize waveform values to 0-100 range for better visibility

Author: ffigueroa

src/api/integrations/channel/whatsapp/whatsapp.baileys.service.ts

@@ -3060,7 +3060,8 @@ export class BaileysStartupService extends ChannelStartupService {
       const waveformLength = 64;
       const samplesPerWaveform = Math.floor(samples.length / waveformLength);
 
-      const waveform = new Uint8Array(waveformLength);
+      // First pass: calculate raw averages
+      const rawValues: number[] = [];
       for (let i = 0; i < waveformLength; i++) {
         const start = i * samplesPerWaveform;
         const end = start + samplesPerWaveform;
@@ -3069,9 +3070,24 @@ export class BaileysStartupService extends ChannelStartupService {
           sum += Math.abs(samples[j]);
         }
         const avg = sum / samplesPerWaveform;
-        // Convert to 0-100 range and clamp values
-        const value = Math.min(100, Math.max(0, Math.floor(avg * 100)));
-        waveform[i] = value;
+        rawValues.push(avg);
+      }
+
+      // Find max value for normalization
+      const maxValue = Math.max(...rawValues);
+      this.logger.info(`Raw waveform max value: ${maxValue}`);
+
+      // Second pass: normalize to 0-100 range
+      const waveform = new Uint8Array(waveformLength);
+      if (maxValue > 0) {
+        for (let i = 0; i < waveformLength; i++) {
+          // Normalize: (value / max) * 100, ensure minimum of 5 for non-zero values
+          const normalized = Math.floor((rawValues[i] / maxValue) * 100);
+          waveform[i] = rawValues[i] > 0 ? Math.max(5, Math.min(100, normalized)) : 0;
+        }
+      } else {
+        // If all values are zero, create a flat waveform at 50
+        waveform.fill(50);
       }
 
       // Log first 10 values for debugging