diff options
Diffstat (limited to 'third_party/libwebrtc/modules/audio_processing/transient/wpd_node.cc')
-rw-r--r-- | third_party/libwebrtc/modules/audio_processing/transient/wpd_node.cc | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/transient/wpd_node.cc b/third_party/libwebrtc/modules/audio_processing/transient/wpd_node.cc new file mode 100644 index 0000000000..2e0ee7e5b7 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_processing/transient/wpd_node.cc @@ -0,0 +1,72 @@ +/* + * 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 |