feat(voice): reduce branching in send path

Author: abalabahaha

lib/voice/SharedStream.js

@@ -182,19 +182,13 @@ class SharedStream extends EventEmitter {
 
     _incrementSequences() {
         for(const vc of this.voiceConnections.values()) {
-            vc.sequence++;
-            if(vc.sequence >= 65536) {
-                vc.sequence -= 65536;
-            }
+            vc.sequence = (vc.sequence + 1) & 0xFFFF;
         }
     }
 
     _incrementTimestamps(val) {
         for(const vc of this.voiceConnections.values()) {
-            vc.timestamp += val;
-            if(vc.timestamp >= 4294967295) {
-                vc.timestamp -= 4294967295;
-            }
+            vc.timestamp = (vc.timestamp + val) & 0xFFFFFFFF;
         }
     }
 

lib/voice/VoiceConnection.js

@@ -641,14 +641,8 @@ class VoiceConnection extends EventEmitter {
     * @arg {Number} [frameSize] The size (in samples) of the Opus audio frame
     */
     sendAudioFrame(frame, frameSize = this.frameSize) {
-        this.timestamp += frameSize;
-        if(this.timestamp >= 4294967295) {
-            this.timestamp -= 4294967295;
-        }
-
-        if(++this.sequence >= 65536) {
-            this.sequence -= 65536;
-        }
+        this.timestamp = (this.timestamp + frameSize) & 0xFFFFFFFF;
+        this.sequence = (this.sequence + 1) & 0xFFFF;
 
         return this._sendAudioFrame(frame);
     }
@@ -796,10 +790,7 @@ class VoiceConnection extends EventEmitter {
                 this.setSpeaking(0);
             }
             this.current.pausedTime += 4 * this.current.options.frameDuration;
-            this.timestamp += 3 * this.current.options.frameSize;
-            if(this.timestamp >= 4294967295) {
-                this.timestamp -= 4294967295;
-            }
+            this.timestamp = (this.timestamp + 3 * this.current.options.frameSize) & 0xFFFFFFFF;
             this.current.timeout = setTimeout(this._send, 4 * this.current.options.frameDuration);
             return;
         } else {