mirror of
https://github.com/oxen-io/session-android.git
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88 lines
2.3 KiB
C++
88 lines
2.3 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 "webrtc/modules/audio_coding/neteq/post_decode_vad.h"
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namespace webrtc {
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PostDecodeVad::~PostDecodeVad() {
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if (vad_instance_)
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WebRtcVad_Free(vad_instance_);
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}
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void PostDecodeVad::Enable() {
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if (!vad_instance_) {
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// Create the instance.
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if (WebRtcVad_Create(&vad_instance_) != 0) {
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// Failed to create instance.
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Disable();
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return;
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}
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}
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Init();
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enabled_ = true;
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}
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void PostDecodeVad::Disable() {
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enabled_ = false;
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running_ = false;
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}
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void PostDecodeVad::Init() {
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running_ = false;
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if (vad_instance_) {
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WebRtcVad_Init(vad_instance_);
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WebRtcVad_set_mode(vad_instance_, kVadMode);
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running_ = true;
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}
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}
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void PostDecodeVad::Update(int16_t* signal, int length,
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AudioDecoder::SpeechType speech_type,
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bool sid_frame,
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int fs_hz) {
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if (!vad_instance_ || !enabled_) {
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return;
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}
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if (speech_type == AudioDecoder::kComfortNoise || sid_frame ||
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fs_hz > 16000) {
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// TODO(hlundin): Remove restriction on fs_hz.
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running_ = false;
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active_speech_ = true;
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sid_interval_counter_ = 0;
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} else if (!running_) {
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++sid_interval_counter_;
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}
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if (sid_interval_counter_ >= kVadAutoEnable) {
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Init();
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}
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if (length > 0 && running_) {
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int vad_sample_index = 0;
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active_speech_ = false;
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// Loop through frame sizes 30, 20, and 10 ms.
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for (int vad_frame_size_ms = 30; vad_frame_size_ms >= 10;
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vad_frame_size_ms -= 10) {
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int vad_frame_size_samples = vad_frame_size_ms * fs_hz / 1000;
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while (length - vad_sample_index >= vad_frame_size_samples) {
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int vad_return = WebRtcVad_Process(
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vad_instance_, fs_hz, &signal[vad_sample_index],
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vad_frame_size_samples);
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active_speech_ |= (vad_return == 1);
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vad_sample_index += vad_frame_size_samples;
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}
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}
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}
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}
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} // namespace webrtc
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