fix(gateway): preserve qualification wire pacing

gateway/qualification_harness_test.go

@@ -762,7 +762,7 @@ func (f *qualificationApolloFixture) sendVideo(ctx context.Context, packets [][]
 	if len(packets) == 0 {
 		return nil
 	}
-	packetsPerMillisecond, batchSize := qualificationApolloVideoPacing(len(packets[0]))
+	packetsPerMillisecond, batchSize := qualificationApolloVideoPacing(apolloVideoRawPacketSize)
 	if packetsPerMillisecond == 0 || batchSize == 0 {
 		return ErrProviderMalformed
 	}
@@ -773,14 +773,11 @@ func (f *qualificationApolloFixture) sendVideo(ctx context.Context, packets [][]
 	if f.videoNext.After(frameStart) {
 		frameStart = f.videoNext
 	}
-	framePackets, groupPackets := 0, 0
+	framePackets := 0
 	for batchStart := 0; batchStart < len(packets); batchStart += batchSize {
-		if framePackets == 0 || groupPackets >= packetsPerMillisecond {
-			due := frameStart.Add(time.Millisecond * time.Duration(framePackets) / time.Duration(packetsPerMillisecond))
-			if err := qualificationWaitContext(ctx, due); err != nil {
-				return err
-			}
-			groupPackets = 0
+		due := frameStart.Add(qualificationApolloVideoOffset(framePackets, packetsPerMillisecond))
+		if err := qualificationWaitContext(ctx, due); err != nil {
+			return err
 		}
 		batchEnd := min(batchStart+batchSize, len(packets))
 		for _, packet := range packets[batchStart:batchEnd] {
@@ -794,9 +791,8 @@ func (f *qualificationApolloFixture) sendVideo(ctx context.Context, packets [][]
 		}
 		currentBatch := batchEnd - batchStart
 		framePackets += currentBatch
-		groupPackets += currentBatch
 	}
-	f.videoNext = frameStart.Add(time.Millisecond * time.Duration(framePackets) / time.Duration(packetsPerMillisecond))
+	f.videoNext = frameStart.Add(qualificationApolloVideoOffset(framePackets, packetsPerMillisecond))
 	return nil
 }
 
@@ -809,6 +805,10 @@ func qualificationApolloVideoPacing(packetBytes int) (packetsPerMillisecond, bat
 	return packetsPerMillisecond, batchSize
 }
 
+func qualificationApolloVideoOffset(packets, packetsPerMillisecond int) time.Duration {
+	return time.Millisecond * time.Duration(packets) / time.Duration(packetsPerMillisecond)
+}
+
 func qualificationWaitContext(ctx context.Context, due time.Time) error {
 	delay := time.Until(due)
 	if delay <= 0 {