1 files changed, 66 insertions, 0 deletions
diff --git a/third_party/libwebrtc/common_audio/vad/vad.cc b/third_party/libwebrtc/common_audio/vad/vad.cc
new file mode 100644
index 0000000000..1647246590
--- /dev/null
+++ b/third_party/libwebrtc/common_audio/vad/vad.cc
@@ -0,0 +1,66 @@
+/*
+ *  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 "common_audio/vad/include/vad.h"
+
+#include <memory>
+
+#include "common_audio/vad/include/webrtc_vad.h"
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+namespace {
+
+class VadImpl final : public Vad {
+ public:
+  explicit VadImpl(Aggressiveness aggressiveness)
+      : handle_(nullptr), aggressiveness_(aggressiveness) {
+    Reset();
+  }
+
+  ~VadImpl() override { WebRtcVad_Free(handle_); }
+
+  Activity VoiceActivity(const int16_t* audio,
+                         size_t num_samples,
+                         int sample_rate_hz) override {
+    int ret = WebRtcVad_Process(handle_, sample_rate_hz, audio, num_samples);
+    switch (ret) {
+      case 0:
+        return kPassive;
+      case 1:
+        return kActive;
+      default:
+        RTC_DCHECK_NOTREACHED() << "WebRtcVad_Process returned an error.";
+        return kError;
+    }
+  }
+
+  void Reset() override {
+    if (handle_)
+      WebRtcVad_Free(handle_);
+    handle_ = WebRtcVad_Create();
+    RTC_CHECK(handle_);
+    RTC_CHECK_EQ(WebRtcVad_Init(handle_), 0);
+    RTC_CHECK_EQ(WebRtcVad_set_mode(handle_, aggressiveness_), 0);
+  }
+
+ private:
+  VadInst* handle_;
+  Aggressiveness aggressiveness_;
+};
+
+}  // namespace
+
+std::unique_ptr<Vad> CreateVad(Vad::Aggressiveness aggressiveness) {
+  return std::unique_ptr<Vad>(new VadImpl(aggressiveness));
+}
+
+}  // namespace webrtc