- initial import

src/engine/media/MT_WebRtc.cpp

@@ -0,0 +1,70 @@
+/* Copyright(C) 2007-2014 VoIP objects (voipobjects.com)
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "../config.h"
+#include "MT_WebRtc.h"
+#include "../helper/HL_Exception.h"
+
+#include <stdlib.h>
+
+static void checkResultCode(unsigned short code)
+{
+  if (code)
+    throw Exception(ERR_WEBRTC, code);
+}
+
+Vad::Vad(int sampleRate)
+:mSampleRate(sampleRate), mContext(NULL)
+{
+  checkResultCode(WebRtcVad_Create(&mContext));
+}
+
+Vad::~Vad()
+{
+  if (mContext)
+    WebRtcVad_Free(mContext);
+}
+
+bool Vad::isSilence(short* samplePtr, int nrOfSamples)
+{
+  short resultCode = WebRtcVad_Process(mContext, mSampleRate, samplePtr, nrOfSamples);
+  return !resultCode;
+}
+
+// -- Cng ---
+Cng::Cng()
+:mEncoder(NULL), mDecoder(NULL)
+{
+  checkResultCode(WebRtcCng_CreateEnc(&mEncoder));
+  checkResultCode(WebRtcCng_CreateDec(&mDecoder));
+}
+
+Cng::~Cng()
+{
+  if (mEncoder) 
+    WebRtcCng_FreeEnc(mEncoder);
+  if (mDecoder)
+    WebRtcCng_FreeDec(mDecoder);
+}
+
+void Cng::updateSid(unsigned char *sidPacket, int sidLength)
+{
+  WebRtcCng_UpdateSid(mDecoder, sidPacket, sidLength);
+}
+
+void Cng::generateSid(short* samples, int nrOfSamples, unsigned char* sidPacket, int* sidLength)
+{
+  WebRtc_Word16 produced = 0;
+  checkResultCode(WebRtcCng_Encode(mEncoder, (WebRtc_Word16*)samples, nrOfSamples, sidPacket, &produced, 1/*TRUE*/));  
+  
+  *sidLength = (int)produced;
+}
+
+void Cng::generateNoise(short* buffer, int nrOfSamples)
+{
+  checkResultCode(WebRtcCng_Generate(mDecoder, buffer, nrOfSamples, 1 /*Reset CNG history*/));
+}
+
+