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Unified Diff: webrtc/modules/audio_processing/aec3/subtractor.h

Issue 2678423005: Finalization of the first version of EchoCanceller 3 (Closed)
Patch Set: Fixed compilation error Created 3 years, 10 months ago
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Index: webrtc/modules/audio_processing/aec3/subtractor.h
diff --git a/webrtc/modules/audio_processing/aec3/subtractor.h b/webrtc/modules/audio_processing/aec3/subtractor.h
new file mode 100644
index 0000000000000000000000000000000000000000..742e57c7fe17989fc6475cac60ab8487f6ddeae9
--- /dev/null
+++ b/webrtc/modules/audio_processing/aec3/subtractor.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2017 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 WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUBTRACTOR_H_
+#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUBTRACTOR_H_
+
+#include <array>
+#include <algorithm>
+#include <vector>
+
+#include "webrtc/base/constructormagic.h"
+#include "webrtc/modules/audio_processing/aec3/adaptive_fir_filter.h"
+#include "webrtc/modules/audio_processing/aec3/aec3_common.h"
+#include "webrtc/modules/audio_processing/aec3/aec3_fft.h"
+#include "webrtc/modules/audio_processing/aec3/echo_path_variability.h"
+#include "webrtc/modules/audio_processing/aec3/fft_buffer.h"
+#include "webrtc/modules/audio_processing/aec3/main_filter_update_gain.h"
+#include "webrtc/modules/audio_processing/aec3/shadow_filter_update_gain.h"
+#include "webrtc/modules/audio_processing/aec3/subtractor_output.h"
+#include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
+#include "webrtc/modules/audio_processing/utility/ooura_fft.h"
+
+namespace webrtc {
+
+// Proves linear echo cancellation functionality
+class Subtractor {
+ public:
+ Subtractor(ApmDataDumper* data_dumper, Aec3Optimization optimization);
+ ~Subtractor();
+
+ // Performs the echo subtraction.
+ void Process(const FftBuffer& render_buffer,
+ const rtc::ArrayView<const float> capture,
+ const RenderSignalAnalyzer& render_signal_analyzer,
+ bool saturation,
+ SubtractorOutput* output);
+
+ // Returns a vector with the number of blocks included in the render buffer
+ // sums.
+ std::vector<size_t> NumBlocksInRenderSums() const;
+
+ // Returns the minimum required farend buffer length.
+ size_t MinFarendBufferLength() const {
+ return std::max(kMainFilterSizePartitions, kShadowFilterSizePartitions);
+ }
+
+ void HandleEchoPathChange(const EchoPathVariability& echo_path_variability);
+
+ // Returns the block-wise frequency response of the main adaptive filter.
+ const std::vector<std::array<float, kFftLengthBy2Plus1>>&
+ FilterFrequencyResponse() const {
+ return main_filter_.FilterFrequencyResponse();
+ }
+
+ private:
+ const size_t kMainFilterSizePartitions = 12;
aleloi 2017/02/23 15:16:01 Here's how to make it constexpr: * declare/define
+ const size_t kShadowFilterSizePartitions = 12;
+
+ const Aec3Fft fft_;
+ ApmDataDumper* data_dumper_;
+ const Aec3Optimization optimization_;
+ AdaptiveFirFilter main_filter_;
+ AdaptiveFirFilter shadow_filter_;
+ MainFilterUpdateGain G_main_;
+ ShadowFilterUpdateGain G_shadow_;
+
+ RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(Subtractor);
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUBTRACTOR_H_

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