void DataServer::readPendingDatagrams() {
QByteArray receivedPacket;
HifiSockAddr senderSockAddr;
while (_socket.hasPendingDatagrams()) {
receivedPacket.resize(_socket.pendingDatagramSize());
_socket.readDatagram(receivedPacket.data(), _socket.pendingDatagramSize(),
senderSockAddr.getAddressPointer(), senderSockAddr.getPortPointer());
PacketType requestType = packetTypeForPacket(receivedPacket);
if ((requestType == PacketTypeDataServerPut || requestType == PacketTypeDataServerGet) &&
receivedPacket[numBytesArithmeticCodingFromBuffer(receivedPacket.data())] == versionForPacketType(requestType)) {
QDataStream packetStream(receivedPacket);
int numReceivedHeaderBytes = numBytesForPacketHeader(receivedPacket);
packetStream.skipRawData(numReceivedHeaderBytes);
// pull the sequence number used for this packet
quint8 sequenceNumber = 0;
packetStream >> sequenceNumber;
// pull the UUID that we will need as part of the key
QString userString;
packetStream >> userString;
QUuid parsedUUID(userString);
if (parsedUUID.isNull()) {
// we failed to parse a UUID, this means the user has sent us a username
// ask redis for the UUID for this user
redisReply* reply = (redisReply*) redisCommand(_redis, "GET user:%s", qPrintable(userString));
if (reply->type == REDIS_REPLY_STRING) {
parsedUUID = QUuid(QString(reply->str));
}
if (!parsedUUID.isNull()) {
qDebug() << "Found UUID" << parsedUUID << "for username" << userString;
} else {
qDebug() << "Failed UUID lookup for username" << userString;
}
freeReplyObject(reply);
reply = NULL;
}
if (!parsedUUID.isNull()) {
if (requestType == PacketTypeDataServerPut) {
// pull the key and value that specifies the data the user is putting/getting
QString dataKey, dataValue;
packetStream >> dataKey >> dataValue;
qDebug("Sending command to redis: SET uuid:%s:%s %s",
qPrintable(uuidStringWithoutCurlyBraces(parsedUUID)),
qPrintable(dataKey), qPrintable(dataValue));
redisReply* reply = (redisReply*) redisCommand(_redis, "SET uuid:%s:%s %s",
qPrintable(uuidStringWithoutCurlyBraces(parsedUUID)),
qPrintable(dataKey), qPrintable(dataValue));
if (reply->type == REDIS_REPLY_STATUS && strcmp("OK", reply->str) == 0) {
// if redis stored the value successfully reply back with a confirm
// which is a reply packet with the sequence number
QByteArray replyPacket = byteArrayWithPopluatedHeader(PacketTypeDataServerConfirm, _uuid);
replyPacket.append(sequenceNumber);
_socket.writeDatagram(replyPacket, senderSockAddr.getAddress(), senderSockAddr.getPort());
}
freeReplyObject(reply);
} else {
// setup a send packet with the returned data
// leverage the packetData sent by overwriting and appending
QByteArray sendPacket = byteArrayWithPopluatedHeader(PacketTypeDataServerSend, _uuid);
QDataStream sendPacketStream(&sendPacket, QIODevice::Append);
sendPacketStream << sequenceNumber;
// pull the key list that specifies the data the user is putting/getting
QString keyListString;
packetStream >> keyListString;
if (keyListString != "uuid") {
// copy the parsed UUID
sendPacketStream << uuidStringWithoutCurlyBraces(parsedUUID);
const char MULTI_KEY_VALUE_SEPARATOR = '|';
// append the keyListString back to the sendPacket
sendPacketStream << keyListString;
QStringList keyList = keyListString.split(MULTI_KEY_VALUE_SEPARATOR);
QStringList valueList;
foreach (const QString& dataKey, keyList) {
qDebug("Sending command to redis: GET uuid:%s:%s",
qPrintable(uuidStringWithoutCurlyBraces(parsedUUID)),
qPrintable(dataKey));
redisReply* reply = (redisReply*) redisCommand(_redis, "GET uuid:%s:%s",
qPrintable(uuidStringWithoutCurlyBraces(parsedUUID)),
qPrintable(dataKey));
if (reply->len) {
// copy the value that redis returned
valueList << QString(reply->str);
} else {
// didn't find a value - insert a space
valueList << QChar(' ');
}
freeReplyObject(reply);
}
// append the value QStringList using the right separator
sendPacketStream << valueList.join(MULTI_KEY_VALUE_SEPARATOR);
} else {
void AudioInjector::injectAudio() {
QByteArray soundByteArray = _sound->getByteArray();
// make sure we actually have samples downloaded to inject
if (soundByteArray.size()) {
// give our sample byte array to the local audio interface, if we have it, so it can be handled locally
if (_options.getLoopbackAudioInterface()) {
// assume that localAudioInterface could be on a separate thread, use Qt::AutoConnection to handle properly
QMetaObject::invokeMethod(_options.getLoopbackAudioInterface(), "handleAudioByteArray",
Qt::AutoConnection,
Q_ARG(QByteArray, soundByteArray));
}
NodeList* nodeList = NodeList::getInstance();
// setup the packet for injected audio
QByteArray injectAudioPacket = byteArrayWithPopluatedHeader(PacketTypeInjectAudio);
QDataStream packetStream(&injectAudioPacket, QIODevice::Append);
packetStream << QUuid::createUuid();
// pack the flag for loopback
uchar loopbackFlag = (uchar) (_options.getLoopbackAudioInterface() == NULL);
packetStream << loopbackFlag;
// pack the position for injected audio
packetStream.writeRawData(reinterpret_cast<const char*>(&_options.getPosition()), sizeof(_options.getPosition()));
// pack our orientation for injected audio
packetStream.writeRawData(reinterpret_cast<const char*>(&_options.getOrientation()), sizeof(_options.getOrientation()));
// pack zero for radius
float radius = 0;
packetStream << radius;
// pack 255 for attenuation byte
quint8 volume = MAX_INJECTOR_VOLUME * _options.getVolume();
packetStream << volume;
timeval startTime = {};
gettimeofday(&startTime, NULL);
int nextFrame = 0;
int currentSendPosition = 0;
int numPreAudioDataBytes = injectAudioPacket.size();
// loop to send off our audio in NETWORK_BUFFER_LENGTH_SAMPLES_PER_CHANNEL byte chunks
while (currentSendPosition < soundByteArray.size()) {
int bytesToCopy = std::min(NETWORK_BUFFER_LENGTH_BYTES_PER_CHANNEL,
soundByteArray.size() - currentSendPosition);
// resize the QByteArray to the right size
injectAudioPacket.resize(numPreAudioDataBytes + bytesToCopy);
// copy the next NETWORK_BUFFER_LENGTH_BYTES_PER_CHANNEL bytes to the packet
memcpy(injectAudioPacket.data() + numPreAudioDataBytes, soundByteArray.data() + currentSendPosition, bytesToCopy);
// grab our audio mixer from the NodeList, if it exists
SharedNodePointer audioMixer = nodeList->soloNodeOfType(NodeType::AudioMixer);
if (audioMixer && nodeList->getNodeActiveSocketOrPing(audioMixer.data())) {
// send off this audio packet
nodeList->getNodeSocket().writeDatagram(injectAudioPacket,
audioMixer->getActiveSocket()->getAddress(),
audioMixer->getActiveSocket()->getPort());
}
currentSendPosition += bytesToCopy;
// send two packets before the first sleep so the mixer can start playback right away
if (currentSendPosition != bytesToCopy && currentSendPosition < soundByteArray.size()) {
// not the first packet and not done
// sleep for the appropriate time
int usecToSleep = usecTimestamp(&startTime) + (++nextFrame * BUFFER_SEND_INTERVAL_USECS) - usecTimestampNow();
if (usecToSleep > 0) {
usleep(usecToSleep);
}
}
}
}
emit finished();
}
