Fold AudioEncoderMutable into AudioEncoder

webrtc/common_audio/vad/vad.cc

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/common_audio/vad/include/vad.h"
 
 #include "webrtc/base/checks.h"
 
 namespace webrtc {
 
-Vad::Vad(enum Aggressiveness mode) {
-  handle_ = WebRtcVad_Create();
-  CHECK(handle_);
-  CHECK_EQ(WebRtcVad_Init(handle_), 0);
-  CHECK_EQ(WebRtcVad_set_mode(handle_, mode), 0);
+Vad::Vad(enum Aggressiveness mode) : handle_(nullptr), aggressiveness_(mode) {
+  Reset();
 }
 
 Vad::~Vad() {
   WebRtcVad_Free(handle_);
 }
 
 enum Vad::Activity Vad::VoiceActivity(const int16_t* audio,
                                       size_t num_samples,
                                       int sample_rate_hz) {
   int ret = WebRtcVad_Process(handle_, sample_rate_hz, audio, num_samples);
   switch (ret) {
     case 0:
       return kPassive;
     case 1:
       return kActive;
     default:
       DCHECK(false) << "WebRtcVad_Process returned an error.";
       return kError;
   }
 }
 
+void Vad::Reset() {
+  if (handle_)
+    WebRtcVad_Free(handle_);
+  handle_ = WebRtcVad_Create();
+  CHECK(handle_);
+  CHECK_EQ(WebRtcVad_Init(handle_), 0);
+  CHECK_EQ(WebRtcVad_set_mode(handle_, aggressiveness_), 0);
+}
+
 }  // namespace webrtc