////  AvatarAudioStream.cpp//  assignment-client/src/audio////  Created by Stephen Birarda on 6/5/13.//  Copyright 2013 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include <udt/PacketHeaders.h> #include "AvatarAudioStream.h" AvatarAudioStream::AvatarAudioStream(bool isStereo, const InboundAudioStream::Settings& settings) :    PositionalAudioStream(PositionalAudioStream::Microphone, isStereo, settings){} int AvatarAudioStream::parseStreamProperties(PacketType type, const QByteArray& packetAfterSeqNum, int& numAudioSamples) {    int readBytes = 0;     if (type == PacketType::SilentAudioFrame) {        const char* dataAt = packetAfterSeqNum.constData();        quint16 numSilentSamples = *(reinterpret_cast<const quint16*>(dataAt));        readBytes += sizeof(quint16);        numAudioSamples = (int)numSilentSamples;         // read the positional data        readBytes += parsePositionalData(packetAfterSeqNum.mid(readBytes));     } else {        _shouldLoopbackForNode = (type == PacketType::MicrophoneAudioWithEcho);         // read the channel flag        quint8 channelFlag = packetAfterSeqNum.at(readBytes);        bool isStereo = channelFlag == 1;        readBytes += sizeof(quint8);         // if isStereo value has changed, restart the ring buffer with new frame size        if (isStereo != _isStereo) {            _ringBuffer.resizeForFrameSize(isStereo                                           ? AudioConstants::NETWORK_FRAME_SAMPLES_STEREO                                           : AudioConstants::NETWORK_FRAME_SAMPLES_PER_CHANNEL);            _isStereo = isStereo;        }         // read the positional data        readBytes += parsePositionalData(packetAfterSeqNum.mid(readBytes));                // calculate how many samples are in this packet        int numAudioBytes = packetAfterSeqNum.size() - readBytes;        numAudioSamples = numAudioBytes / sizeof(int16_t);    }     return readBytes;}