webrtc/modules/audio_processing/agc2/vector_float_frame.h
Alex Loiko 153f11e1b4 AGC2-fixed-digital: Level Estimator
This CL adds the Level Estimator of the new gain controller. The Level
Estimator divides a 10ms input frame in kSubFramesInFrame=20 sub
frames. We take the maximal sample values in every sub frame. We then
apply attack/decay smoothing. This is the final level estimate.

The results will be used with InterpolatedGainCurve (see this CL
https://webrtc-review.googlesource.com/c/src/+/51920). For every level
estimate value, we look up a gain with
InterpolatedGainCurve::LookUpGainToApply. This gain is then applied to
the signal.

Bug: webrtc:7949
Change-Id: I2b4b3894a3e945d3dd916ce516c79abacb2b18b1
Reviewed-on: https://webrtc-review.googlesource.com/52381
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Commit-Queue: Alex Loiko <aleloi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22054}
2018-02-16 13:55:18 +00:00

42 lines
1.3 KiB
C++

/*
* 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 MODULES_AUDIO_PROCESSING_AGC2_VECTOR_FLOAT_FRAME_H_
#define MODULES_AUDIO_PROCESSING_AGC2_VECTOR_FLOAT_FRAME_H_
#include <vector>
#include "modules/audio_processing/include/audio_frame_view.h"
namespace webrtc {
// A construct consisting of a multi-channel audio frame, and a FloatFrame view
// of it.
class VectorFloatFrame {
public:
VectorFloatFrame(int num_channels,
int samples_per_channel,
float start_value);
const AudioFrameView<float>& float_frame_view() { return float_frame_view_; }
AudioFrameView<const float> float_frame_view() const {
return float_frame_view_;
}
~VectorFloatFrame();
private:
std::vector<std::vector<float>> channels_;
std::vector<float*> channel_ptrs_;
AudioFrameView<float> float_frame_view_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AGC2_VECTOR_FLOAT_FRAME_H_