Index: webrtc/modules/audio_processing/level_controller/signal_classifier.h |
diff --git a/webrtc/modules/audio_processing/level_controller/signal_classifier.h b/webrtc/modules/audio_processing/level_controller/signal_classifier.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..c6e661031c95027a1328db74988221f02d65ca25 |
--- /dev/null |
+++ b/webrtc/modules/audio_processing/level_controller/signal_classifier.h |
@@ -0,0 +1,51 @@ |
+/* |
+ * 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. |
+ */ |
+ |
+#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_SIGNAL_CLASSIFIER_H_ |
+#define WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_SIGNAL_CLASSIFIER_H_ |
+ |
+#include <memory> |
+ |
+#include "webrtc/base/array_view.h" |
+#include "webrtc/base/constructormagic.h" |
+#include "webrtc/modules/audio_processing/level_controller/down_sampler.h" |
+#include "webrtc/modules/audio_processing/level_controller/noise_spectrum_estimator.h" |
+ |
+namespace webrtc { |
+ |
+class ApmDataDumper; |
+class AudioBuffer; |
+class FrameExtender; |
+ |
+class SignalClassifier { |
+ public: |
+ enum class SignalType { kHighlyNonStationary, kNonStationary, kStationary }; |
+ |
+ explicit SignalClassifier(ApmDataDumper* data_dumper); |
+ ~SignalClassifier(); |
+ |
+ void Initialize(int sample_rate_hz); |
+ void Analyze(const AudioBuffer& audio, SignalType* signal_type); |
+ |
+ private: |
+ ApmDataDumper* data_dumper_; |
+ DownSampler down_sampler_; |
+ std::unique_ptr<FrameExtender> frame_extender_; |
+ NoiseSpectrumEstimator noise_spectrum_estimator_; |
+ int sample_rate_hz_; |
+ int initialization_frames_left_; |
+ int consistent_classification_counter_; |
+ SignalType last_signal_type_; |
+ RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(SignalClassifier); |
+}; |
+ |
+} // namespace webrtc |
+ |
+#endif // WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_SIGNAL_CLASSIFIER_H_ |