add code.

VocieProcess/api/audio/echo_canceller3_factory.cc

@@ -0,0 +1,35 @@
+/*
+ *  Copyright (c) 2018 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 "api/audio/echo_canceller3_factory.h"
+
+#include <memory>
+
+#include "absl/types/optional.h"
+#include "api/audio/echo_canceller3_config.h"
+#include "api/audio/echo_control.h"
+#include "modules/audio_processing/aec3/echo_canceller3.h"
+
+namespace webrtc {
+
+EchoCanceller3Factory::EchoCanceller3Factory() {}
+
+EchoCanceller3Factory::EchoCanceller3Factory(const EchoCanceller3Config& config)
+    : config_(config) {}
+
+std::unique_ptr<EchoControl> EchoCanceller3Factory::Create(
+    int sample_rate_hz,
+    int num_render_channels,
+    int num_capture_channels) {
+  return std::make_unique<EchoCanceller3>(
+      config_, /*multichannel_config=*/absl::nullopt, sample_rate_hz,
+      num_render_channels, num_capture_channels);
+}
+
+}  // namespace webrtc

VocieProcess/api/audio/echo_canceller3_factory.h

@@ -0,0 +1,41 @@
+/*
+ *  Copyright (c) 2018 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.
+ */
+
+#ifndef API_AUDIO_ECHO_CANCELLER3_FACTORY_H_
+#define API_AUDIO_ECHO_CANCELLER3_FACTORY_H_
+
+#include <memory>
+
+#include "api/audio/echo_canceller3_config.h"
+#include "api/audio/echo_control.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+class RTC_EXPORT EchoCanceller3Factory : public EchoControlFactory {
+ public:
+  // Factory producing EchoCanceller3 instances with the default configuration.
+  EchoCanceller3Factory();
+
+  // Factory producing EchoCanceller3 instances with the specified
+  // configuration.
+  explicit EchoCanceller3Factory(const EchoCanceller3Config& config);
+
+  // Creates an EchoCanceller3 with a specified channel count and sampling rate.
+  std::unique_ptr<EchoControl> Create(int sample_rate_hz,
+                                      int num_render_channels,
+                                      int num_capture_channels) override;
+
+ private:
+  const EchoCanceller3Config config_;
+};
+}  // namespace webrtc
+
+#endif  // API_AUDIO_ECHO_CANCELLER3_FACTORY_H_