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/*
* Copyright (c) 2013 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.
*/
#include "modules/audio_processing/transient/wpd_node.h"
#include <math.h>
#include <string.h>
#include "common_audio/fir_filter.h"
#include "common_audio/fir_filter_factory.h"
#include "modules/audio_processing/transient/dyadic_decimator.h"
#include "rtc_base/checks.h"
namespace webrtc {
WPDNode::WPDNode(size_t length,
const float* coefficients,
size_t coefficients_length)
: // The data buffer has parent data length to be able to contain and
// filter it.
data_(new float[2 * length + 1]),
length_(length),
filter_(
CreateFirFilter(coefficients, coefficients_length, 2 * length + 1)) {
RTC_DCHECK_GT(length, 0);
RTC_DCHECK(coefficients);
RTC_DCHECK_GT(coefficients_length, 0);
memset(data_.get(), 0.f, (2 * length + 1) * sizeof(data_[0]));
}
WPDNode::~WPDNode() {}
int WPDNode::Update(const float* parent_data, size_t parent_data_length) {
if (!parent_data || (parent_data_length / 2) != length_) {
return -1;
}
// Filter data.
filter_->Filter(parent_data, parent_data_length, data_.get());
// Decimate data.
const bool kOddSequence = true;
size_t output_samples = DyadicDecimate(data_.get(), parent_data_length,
kOddSequence, data_.get(), length_);
if (output_samples != length_) {
return -1;
}
// Get abs to all values.
for (size_t i = 0; i < length_; ++i) {
data_[i] = fabs(data_[i]);
}
return 0;
}
int WPDNode::set_data(const float* new_data, size_t length) {
if (!new_data || length != length_) {
return -1;
}
memcpy(data_.get(), new_data, length * sizeof(data_[0]));
return 0;
}
} // namespace webrtc
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