b5c48b97f6
Ongoing fixes and improvements, transient suppressor is gone. Also, dropping isac because it doesn't seem to be useful, and is just build system deadweight now. Upstream references: Version: 131.0.6778.200 WebRTC: 79aff54b0fa9238ce3518dd9eaf9610cd6f22e82 Chromium: 2a19506ad24af755f2a215a4c61f775393e0db42
128 lines
4.6 KiB
C++
128 lines
4.6 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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#include "common_audio/resampler/include/push_resampler.h"
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#include <stdint.h>
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#include <string.h>
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#include <memory>
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#include "api/audio/audio_frame.h"
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#include "common_audio/include/audio_util.h"
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#include "common_audio/resampler/push_sinc_resampler.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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namespace {
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// Maximum concurrent number of channels for `PushResampler<>`.
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// Note that this may be different from what the maximum is for audio codecs.
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constexpr int kMaxNumberOfChannels = 8;
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} // namespace
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template <typename T>
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PushResampler<T>::PushResampler() = default;
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template <typename T>
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PushResampler<T>::PushResampler(size_t src_samples_per_channel,
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size_t dst_samples_per_channel,
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size_t num_channels) {
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EnsureInitialized(src_samples_per_channel, dst_samples_per_channel,
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num_channels);
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}
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template <typename T>
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PushResampler<T>::~PushResampler() = default;
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template <typename T>
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void PushResampler<T>::EnsureInitialized(size_t src_samples_per_channel,
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size_t dst_samples_per_channel,
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size_t num_channels) {
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RTC_DCHECK_GT(src_samples_per_channel, 0);
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RTC_DCHECK_GT(dst_samples_per_channel, 0);
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RTC_DCHECK_GT(num_channels, 0);
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RTC_DCHECK_LE(src_samples_per_channel, kMaxSamplesPerChannel10ms);
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RTC_DCHECK_LE(dst_samples_per_channel, kMaxSamplesPerChannel10ms);
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RTC_DCHECK_LE(num_channels, kMaxNumberOfChannels);
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if (src_samples_per_channel == SamplesPerChannel(source_view_) &&
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dst_samples_per_channel == SamplesPerChannel(destination_view_) &&
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num_channels == NumChannels(source_view_)) {
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// No-op if settings haven't changed.
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return;
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}
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// Allocate two buffers for all source and destination channels.
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// Then organize source and destination views together with an array of
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// resamplers for each channel in the deinterlaved buffers.
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source_.reset(new T[src_samples_per_channel * num_channels]);
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destination_.reset(new T[dst_samples_per_channel * num_channels]);
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source_view_ = DeinterleavedView<T>(source_.get(), src_samples_per_channel,
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num_channels);
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destination_view_ = DeinterleavedView<T>(
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destination_.get(), dst_samples_per_channel, num_channels);
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resamplers_.resize(num_channels);
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for (size_t i = 0; i < num_channels; ++i) {
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resamplers_[i] = std::make_unique<PushSincResampler>(
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src_samples_per_channel, dst_samples_per_channel);
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}
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}
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template <typename T>
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int PushResampler<T>::Resample(InterleavedView<const T> src,
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InterleavedView<T> dst) {
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EnsureInitialized(SamplesPerChannel(src), SamplesPerChannel(dst),
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NumChannels(src));
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RTC_DCHECK_EQ(NumChannels(src), NumChannels(source_view_));
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RTC_DCHECK_EQ(NumChannels(dst), NumChannels(destination_view_));
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RTC_DCHECK_EQ(SamplesPerChannel(src), SamplesPerChannel(source_view_));
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RTC_DCHECK_EQ(SamplesPerChannel(dst), SamplesPerChannel(destination_view_));
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if (SamplesPerChannel(src) == SamplesPerChannel(dst)) {
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// The old resampler provides this memcpy facility in the case of matching
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// sample rates, so reproduce it here for the sinc resampler.
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CopySamples(dst, src);
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return static_cast<int>(src.data().size());
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}
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Deinterleave(src, source_view_);
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for (size_t i = 0; i < resamplers_.size(); ++i) {
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size_t dst_length_mono =
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resamplers_[i]->Resample(source_view_[i], destination_view_[i]);
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RTC_DCHECK_EQ(dst_length_mono, SamplesPerChannel(dst));
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}
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Interleave<T>(destination_view_, dst);
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return static_cast<int>(dst.size());
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}
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template <typename T>
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int PushResampler<T>::Resample(MonoView<const T> src, MonoView<T> dst) {
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RTC_DCHECK_EQ(resamplers_.size(), 1);
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RTC_DCHECK_EQ(SamplesPerChannel(src), SamplesPerChannel(source_view_));
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RTC_DCHECK_EQ(SamplesPerChannel(dst), SamplesPerChannel(destination_view_));
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if (SamplesPerChannel(src) == SamplesPerChannel(dst)) {
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CopySamples(dst, src);
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return static_cast<int>(src.size());
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}
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return resamplers_[0]->Resample(src, dst);
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}
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// Explictly generate required instantiations.
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template class PushResampler<int16_t>;
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template class PushResampler<float>;
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} // namespace webrtc
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