Creating a C++ wrapper class for VAD
Also adding a mock. This work is part of an ongoing effort to
encapsulate encoders in AudioEncoder classes. The CNG encoder will also
be implemented as an AudioEncoder class, and will also contain a VAD
C++ wrapper.
BUG=3926
R=bjornv@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/27839004
git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@7570 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/common_audio/vad/vad.cc b/common_audio/vad/vad.cc
new file mode 100644
index 0000000..9cc0c19
--- /dev/null
+++ b/common_audio/vad/vad.cc
@@ -0,0 +1,43 @@
+/*
+ * 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) {
+ CHECK_EQ(WebRtcVad_Create(&handle_), 0);
+ CHECK_EQ(WebRtcVad_Init(handle_), 0);
+ CHECK_EQ(WebRtcVad_set_mode(handle_, mode), 0);
+}
+
+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, static_cast<int>(num_samples));
+ switch (ret) {
+ case 0:
+ return kPassive;
+ case 1:
+ return kActive;
+ default:
+ DCHECK(false) << "WebRtcVad_Process returned an error.";
+ return kError;
+ }
+}
+
+} // namespace webrtc
