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a4d873786f
This CL was generated by running git ls-files | grep -P "(\.h|\.cc)$" | grep -v 'sdk/' | grep -v 'rtc_base/ssl_' | \ grep -v 'fake_rtc_certificate_generator.h' | grep -v 'modules/audio_device/win/' | \ grep -v 'system_wrappers/source/clock.cc' | grep -v 'rtc_base/trace_event.h' | \ grep -v 'modules/audio_coding/codecs/ilbc/' | grep -v 'screen_capturer_mac.h' | \ grep -v 'spl_inl_mips.h' | grep -v 'data_size_unittest.cc' | grep -v 'timestamp_unittest.cc' \ | xargs clang-format -i ; git cl format Most of these changes are clang-format grouping and reordering includes differently. Bug: webrtc:9340 Change-Id: Ic83ddbc169bfacd21883e381b5181c3dd4fe8a63 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/144051 Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28505}
131 lines
5 KiB
C++
131 lines
5 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_coding/neteq/comfort_noise.h"
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#include <assert.h>
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#include <cstdint>
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#include <memory>
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#include "api/array_view.h"
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#include "modules/audio_coding/codecs/cng/webrtc_cng.h"
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#include "modules/audio_coding/neteq/audio_multi_vector.h"
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#include "modules/audio_coding/neteq/audio_vector.h"
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#include "modules/audio_coding/neteq/decoder_database.h"
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#include "modules/audio_coding/neteq/dsp_helper.h"
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#include "modules/audio_coding/neteq/sync_buffer.h"
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#include "rtc_base/buffer.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/logging.h"
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namespace webrtc {
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void ComfortNoise::Reset() {
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first_call_ = true;
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}
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int ComfortNoise::UpdateParameters(const Packet& packet) {
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// Get comfort noise decoder.
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if (decoder_database_->SetActiveCngDecoder(packet.payload_type) != kOK) {
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return kUnknownPayloadType;
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}
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ComfortNoiseDecoder* cng_decoder = decoder_database_->GetActiveCngDecoder();
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RTC_DCHECK(cng_decoder);
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cng_decoder->UpdateSid(packet.payload);
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return kOK;
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}
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int ComfortNoise::Generate(size_t requested_length, AudioMultiVector* output) {
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// TODO(hlundin): Change to an enumerator and skip assert.
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assert(fs_hz_ == 8000 || fs_hz_ == 16000 || fs_hz_ == 32000 ||
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fs_hz_ == 48000);
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// Not adapted for multi-channel yet.
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if (output->Channels() != 1) {
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RTC_LOG(LS_ERROR) << "No multi-channel support";
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return kMultiChannelNotSupported;
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}
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size_t number_of_samples = requested_length;
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bool new_period = false;
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if (first_call_) {
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// Generate noise and overlap slightly with old data.
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number_of_samples = requested_length + overlap_length_;
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new_period = true;
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}
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output->AssertSize(number_of_samples);
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// Get the decoder from the database.
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ComfortNoiseDecoder* cng_decoder = decoder_database_->GetActiveCngDecoder();
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if (!cng_decoder) {
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RTC_LOG(LS_ERROR) << "Unknwown payload type";
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return kUnknownPayloadType;
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}
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std::unique_ptr<int16_t[]> temp(new int16_t[number_of_samples]);
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if (!cng_decoder->Generate(
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rtc::ArrayView<int16_t>(temp.get(), number_of_samples), new_period)) {
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// Error returned.
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output->Zeros(requested_length);
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RTC_LOG(LS_ERROR)
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<< "ComfortNoiseDecoder::Genererate failed to generate comfort noise";
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return kInternalError;
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}
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(*output)[0].OverwriteAt(temp.get(), number_of_samples, 0);
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if (first_call_) {
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// Set tapering window parameters. Values are in Q15.
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int16_t muting_window; // Mixing factor for overlap data.
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int16_t muting_window_increment; // Mixing factor increment (negative).
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int16_t unmuting_window; // Mixing factor for comfort noise.
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int16_t unmuting_window_increment; // Mixing factor increment.
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if (fs_hz_ == 8000) {
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muting_window = DspHelper::kMuteFactorStart8kHz;
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muting_window_increment = DspHelper::kMuteFactorIncrement8kHz;
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unmuting_window = DspHelper::kUnmuteFactorStart8kHz;
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unmuting_window_increment = DspHelper::kUnmuteFactorIncrement8kHz;
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} else if (fs_hz_ == 16000) {
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muting_window = DspHelper::kMuteFactorStart16kHz;
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muting_window_increment = DspHelper::kMuteFactorIncrement16kHz;
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unmuting_window = DspHelper::kUnmuteFactorStart16kHz;
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unmuting_window_increment = DspHelper::kUnmuteFactorIncrement16kHz;
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} else if (fs_hz_ == 32000) {
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muting_window = DspHelper::kMuteFactorStart32kHz;
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muting_window_increment = DspHelper::kMuteFactorIncrement32kHz;
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unmuting_window = DspHelper::kUnmuteFactorStart32kHz;
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unmuting_window_increment = DspHelper::kUnmuteFactorIncrement32kHz;
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} else { // fs_hz_ == 48000
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muting_window = DspHelper::kMuteFactorStart48kHz;
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muting_window_increment = DspHelper::kMuteFactorIncrement48kHz;
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unmuting_window = DspHelper::kUnmuteFactorStart48kHz;
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unmuting_window_increment = DspHelper::kUnmuteFactorIncrement48kHz;
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}
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// Do overlap-add between new vector and overlap.
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size_t start_ix = sync_buffer_->Size() - overlap_length_;
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for (size_t i = 0; i < overlap_length_; i++) {
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/* overlapVec[i] = WinMute * overlapVec[i] + WinUnMute * outData[i] */
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// The expression (*output)[0][i] is the i-th element in the first
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// channel.
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(*sync_buffer_)[0][start_ix + i] =
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(((*sync_buffer_)[0][start_ix + i] * muting_window) +
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((*output)[0][i] * unmuting_window) + 16384) >>
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15;
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muting_window += muting_window_increment;
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unmuting_window += unmuting_window_increment;
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}
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// Remove |overlap_length_| samples from the front of |output| since they
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// were mixed into |sync_buffer_| above.
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output->PopFront(overlap_length_);
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}
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first_call_ = false;
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return kOK;
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}
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} // namespace webrtc
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