Move VoiceEngineObserver into AudioSendStream so that we detect typing noises and return properly i…

webrtc/audio/typing_noise_observer.cc

+/*
+ *  Copyright (c) 2015 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/audio/typing_noise_observer.h"
+
+#include "webrtc/base/checks.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/voice_engine/include/voe_errors.h"
+
+namespace webrtc {
+namespace internal {
+
+void TypingNoiseObserver::CallbackOnError(int channel_id, int err_code) {
+  // All call sites in VoE, as of this writing, specify -1 as channel_id.
+  RTC_DCHECK(channel_id == -1);
+  LOG(LS_INFO) << "VoiceEngine error " << err_code << " reported on channel "
+                  << channel_id << ".";
+  if (err_code == VE_TYPING_NOISE_WARNING) {
+    typing_noise_detected_ = true;
+  } else if (err_code == VE_TYPING_NOISE_OFF_WARNING) {
+    typing_noise_detected_ = false;
+  }
+}
+}  // namespace internal
+}  // namespace webrtc