Move echo_control.h to api/audio
Bug: webrtc:8844
Change-Id: I5c2406c43ade786c26e12b3c847fed8424283df0
Reviewed-on: https://webrtc-review.googlesource.com/53700
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22031}diff --git a/api/audio/echo_control.h b/api/audio/echo_control.h
new file mode 100644
index 0000000..021bbf8
--- /dev/null
+++ b/api/audio/echo_control.h
@@ -0,0 +1,52 @@
+/*
+ * 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_CONTROL_H_
+#define API_AUDIO_ECHO_CONTROL_H_
+
+#include <memory>
+
+namespace webrtc {
+
+class AudioBuffer;
+
+// Interface for an acoustic echo cancellation (AEC) submodule.
+class EchoControl {
+ public:
+ // Analysis (not changing) of the render signal.
+ virtual void AnalyzeRender(AudioBuffer* render) = 0;
+
+ // Analysis (not changing) of the capture signal.
+ virtual void AnalyzeCapture(AudioBuffer* capture) = 0;
+
+ // Processes the capture signal in order to remove the echo.
+ virtual void ProcessCapture(AudioBuffer* capture, bool echo_path_change) = 0;
+
+ struct Metrics {
+ double echo_return_loss;
+ double echo_return_loss_enhancement;
+ int delay_ms;
+ };
+
+ // Collect current metrics from the echo controller.
+ virtual Metrics GetMetrics() const = 0;
+
+ virtual ~EchoControl() {}
+};
+
+// Interface for a factory that creates EchoControllers.
+class EchoControlFactory {
+ public:
+ virtual std::unique_ptr<EchoControl> Create(int sample_rate_hz) = 0;
+ virtual ~EchoControlFactory() = default;
+};
+} // namespace webrtc
+
+#endif // API_AUDIO_ECHO_CONTROL_H_