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https://github.com/danog/libtgvoip.git
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5caaaafa42
I'm now using the entire audio processing module from WebRTC as opposed to individual DSP algorithms pulled from there before. Seems to work better this way.
54 lines
1.9 KiB
C++
54 lines
1.9 KiB
C++
/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_TRANSIENT_MOVING_MOMENTS_H_
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#define MODULES_AUDIO_PROCESSING_TRANSIENT_MOVING_MOMENTS_H_
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#include <stddef.h>
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#include <queue>
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namespace webrtc {
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// Calculates the first and second moments for each value of a buffer taking
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// into account a given number of previous values.
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// It preserves its state, so it can be multiple-called.
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// TODO(chadan): Implement a function that takes a buffer of first moments and a
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// buffer of second moments; and calculates the variances. When needed.
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// TODO(chadan): Add functionality to update with a buffer but only output are
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// the last values of the moments. When needed.
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class MovingMoments {
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public:
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// Creates a Moving Moments object, that uses the last |length| values
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// (including the new value introduced in every new calculation).
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explicit MovingMoments(size_t length);
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~MovingMoments();
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// Calculates the new values using |in|. Results will be in the out buffers.
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// |first| and |second| must be allocated with at least |in_length|.
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void CalculateMoments(const float* in,
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size_t in_length,
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float* first,
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float* second);
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private:
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size_t length_;
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// A queue holding the |length_| latest input values.
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std::queue<float> queue_;
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// Sum of the values of the queue.
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float sum_;
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// Sum of the squares of the values of the queue.
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float sum_of_squares_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_TRANSIENT_MOVING_MOMENTS_H_
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