3f81fcd2e8
If the specification for the speech encoder hasn't changed, we should reuse it instead of recreating it. Otherwise, we lose its state. (This problem was originally discovered because AudioEncoderOpus instances would forget that they were supposed to be using DTX.) BUG=webrtc:6020, chromium:622647 Review-Url: https://codereview.webrtc.org/2089183002 Cr-Commit-Position: refs/heads/master@{#13273}