mirror of
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.
136 lines
2.9 KiB
C++
136 lines
2.9 KiB
C++
/*
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* Copyright (c) 2012 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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#include "modules/audio_processing/vad/vad_circular_buffer.h"
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#include <stdlib.h>
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namespace webrtc {
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VadCircularBuffer::VadCircularBuffer(int buffer_size)
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: buffer_(new double[buffer_size]),
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is_full_(false),
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index_(0),
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buffer_size_(buffer_size),
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sum_(0) {}
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VadCircularBuffer::~VadCircularBuffer() {}
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void VadCircularBuffer::Reset() {
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is_full_ = false;
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index_ = 0;
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sum_ = 0;
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}
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VadCircularBuffer* VadCircularBuffer::Create(int buffer_size) {
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if (buffer_size <= 0)
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return NULL;
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return new VadCircularBuffer(buffer_size);
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}
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double VadCircularBuffer::Oldest() const {
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if (!is_full_)
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return buffer_[0];
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else
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return buffer_[index_];
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}
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double VadCircularBuffer::Mean() {
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double m;
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if (is_full_) {
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m = sum_ / buffer_size_;
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} else {
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if (index_ > 0)
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m = sum_ / index_;
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else
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m = 0;
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}
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return m;
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}
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void VadCircularBuffer::Insert(double value) {
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if (is_full_) {
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sum_ -= buffer_[index_];
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}
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sum_ += value;
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buffer_[index_] = value;
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index_++;
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if (index_ >= buffer_size_) {
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is_full_ = true;
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index_ = 0;
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}
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}
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int VadCircularBuffer::BufferLevel() {
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if (is_full_)
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return buffer_size_;
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return index_;
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}
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int VadCircularBuffer::Get(int index, double* value) const {
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int err = ConvertToLinearIndex(&index);
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if (err < 0)
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return -1;
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*value = buffer_[index];
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return 0;
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}
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int VadCircularBuffer::Set(int index, double value) {
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int err = ConvertToLinearIndex(&index);
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if (err < 0)
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return -1;
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sum_ -= buffer_[index];
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buffer_[index] = value;
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sum_ += value;
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return 0;
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}
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int VadCircularBuffer::ConvertToLinearIndex(int* index) const {
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if (*index < 0 || *index >= buffer_size_)
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return -1;
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if (!is_full_ && *index >= index_)
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return -1;
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*index = index_ - 1 - *index;
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if (*index < 0)
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*index += buffer_size_;
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return 0;
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}
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int VadCircularBuffer::RemoveTransient(int width_threshold,
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double val_threshold) {
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if (!is_full_ && index_ < width_threshold + 2)
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return 0;
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int index_1 = 0;
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int index_2 = width_threshold + 1;
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double v = 0;
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if (Get(index_1, &v) < 0)
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return -1;
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if (v < val_threshold) {
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Set(index_1, 0);
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int index;
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for (index = index_2; index > index_1; index--) {
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if (Get(index, &v) < 0)
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return -1;
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if (v < val_threshold)
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break;
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}
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for (; index > index_1; index--) {
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if (Set(index, 0.0) < 0)
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return -1;
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}
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}
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return 0;
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}
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} // namespace webrtc
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