////  InjectedAudioStream.cpp//  libraries/audio/src////  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 "InjectedAudioStream.h" #include <cstring> #include <QtCore/QDataStream>#include <QtCore/qdebug.h> #include <udt/PacketHeaders.h>#include <UUID.h> #include "AudioHelpers.h" InjectedAudioStream::InjectedAudioStream(const QUuid& streamIdentifier, bool isStereo, int numStaticJitterFrames) :    PositionalAudioStream(PositionalAudioStream::Injector, isStereo, numStaticJitterFrames),    _streamIdentifier(streamIdentifier),    _radius(0.0f),    _attenuationRatio(0) {}  int InjectedAudioStream::parseStreamProperties(PacketType type,                                               const QByteArray& packetAfterSeqNum,                                               int& numAudioSamples) {     // setup a data stream to read from this packet    QDataStream packetStream(packetAfterSeqNum);     // skip the stream identifier    packetStream.skipRawData(NUM_BYTES_RFC4122_UUID);        // read the channel flag    bool isStereo;    packetStream >> isStereo;        // 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;    }     // pull the loopback flag and set our boolean    LoopbackFlag shouldLoopback;    packetStream >> shouldLoopback;    _shouldLoopbackForNode = (shouldLoopback == 1);     // use parsePositionalData in parent PostionalAudioRingBuffer class to pull common positional data    packetStream.skipRawData(parsePositionalData(packetAfterSeqNum.mid(packetStream.device()->pos())));     // pull out the radius for this injected source - if it's zero this is a point source    packetStream >> _radius;     quint8 attenuationByte = 0;    packetStream >> attenuationByte;    _attenuationRatio = unpackFloatGainFromByte(attenuationByte);        packetStream >> _ignorePenumbra;        int numAudioBytes = packetAfterSeqNum.size() - packetStream.device()->pos();    numAudioSamples = numAudioBytes / sizeof(int16_t);     return packetStream.device()->pos();} AudioStreamStats InjectedAudioStream::getAudioStreamStats() const {    AudioStreamStats streamStats = PositionalAudioStream::getAudioStreamStats();    streamStats._streamIdentifier = _streamIdentifier;    return streamStats;}