The buffer level should not be converted back and forth between samples and packets in case of variable packet lengths. Bug: webrtc:10736 Change-Id: Ia08dcfac3d8104dc79fbad0704a5f6f12a050a01 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/142178 Reviewed-by: Minyue Li <minyue@webrtc.org> Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28368}