Added first layer of the echo canceller 3 functionality

webrtc/modules/audio_processing/aec3/block_processor_unittest.cc

+/*
+ *  Copyright (c) 2016 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 <memory>
+#include <string>
+#include <vector>
+
+#include "webrtc/modules/audio_processing/aec3/aec3_constants.h"
+#include "webrtc/modules/audio_processing/aec3/block_processor.h"

[hlundin-webrtc, 2016/12/22 10:23:56]

This goes at the top.

[peah-webrtc, 2016/12/22 16:40:03]

Done.

+#include "webrtc/test/gtest.h"
+
+namespace webrtc {
+namespace {
+
+// Verifies that the basic BlockProcessor functionality works and that the API
+// methods are callable.
+void RunBasicSetupAndApiCallTest(int sample_rate_hz, size_t num_bands) {
+  std::unique_ptr<BlockProcessor> block_processor(
+      BlockProcessor::Create(sample_rate_hz, num_bands));
+  std::vector<std::vector<float>> block(num_bands,
+                                        std::vector<float>(kBlockSize, 0.f));
+
+  EXPECT_FALSE(block_processor->BufferRender(&block));
+  block_processor->ProcessCapture(false, false, &block);
+  block_processor->ReportEchoLeakage(false);
+}
+
+}  // namespace
+
+TEST(BlockProcessor, BasicSetupAndApiCalls) {
+  for (auto rate : {8000, 16000, 32000, 48000}) {
+    std::ostringstream ss;
+    ss << "Sample rate: " << rate;
+    SCOPED_TRACE(ss.str());
+    RunBasicSetupAndApiCallTest(rate, NumBandsForRate(rate));
+  }
+}
+
+}  // namespace webrtc