SOCKET connectTcpSocket(struct sockaddr_storage *dstaddr, SOCKADDR_LEN addrlen, unsigned short port) {
SOCKET s;
struct sockaddr_in6 addr;
int err;
#ifdef LC_DARWIN
int val;
#endif
s = socket(dstaddr->ss_family, SOCK_STREAM, IPPROTO_TCP);
if (s == INVALID_SOCKET) {
Limelog("socket() failed: %d\n", (int)LastSocketError());
return INVALID_SOCKET;
}
#ifdef LC_DARWIN
// Disable SIGPIPE on iOS
val = 1;
setsockopt(s, SOL_SOCKET, SO_NOSIGPIPE, (char* )&val, sizeof(val));
#endif
memcpy(&addr, dstaddr, sizeof(addr));
addr.sin6_port = htons(port);
if (connect(s, (struct sockaddr*) &addr, addrlen) == SOCKET_ERROR) {
err = LastSocketError();
Limelog("connect() failed: %d\n", err);
closesocket(s);
SetLastSocketError(err);
return INVALID_SOCKET;
}
return s;
}
static void requestIdrFrame(void) {
long long payload[3];
if (ServerMajorVersion == 3) {
// Form the payload
payload[0] = 0;
payload[1] = 0xFFFFF;
payload[2] = 0;
// Send the reference frame invalidation request and read the response
if (!sendMessageAndDiscardReply(packetTypes[IDX_INVALIDATE_REF_FRAMES],
payloadLengths[IDX_INVALIDATE_REF_FRAMES], payload)) {
Limelog("Request IDR Frame: Transaction failed: %d\n", (int) LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketError());
return;
}
}
else {
// Send IDR frame request and read the response
if (!sendMessageAndDiscardReply(packetTypes[IDX_REQUEST_IDR_FRAME],
payloadLengths[IDX_REQUEST_IDR_FRAME], preconstructedPayloads[IDX_REQUEST_IDR_FRAME])) {
Limelog("Request IDR Frame: Transaction failed: %d\n", (int) LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketError());
return;
}
}
Limelog("IDR frame request sent\n");
}
// Start the video stream
int startVideoStream(void* rendererContext, int drFlags) {
int err;
// This must be called before the decoder thread starts submitting
// decode units
LC_ASSERT(NegotiatedVideoFormat != 0);
VideoCallbacks.setup(NegotiatedVideoFormat, StreamConfig.width,
StreamConfig.height, StreamConfig.fps, rendererContext, drFlags);
rtpSocket = bindUdpSocket(RemoteAddr.ss_family, RTP_RECV_BUFFER);
if (rtpSocket == INVALID_SOCKET) {
return LastSocketError();
}
err = PltCreateThread(ReceiveThreadProc, NULL, &receiveThread);
if (err != 0) {
return err;
}
if ((VideoCallbacks.capabilities & CAPABILITY_DIRECT_SUBMIT) == 0) {
err = PltCreateThread(DecoderThreadProc, NULL, &decoderThread);
if (err != 0) {
return err;
}
}
if (ServerMajorVersion == 3) {
// Connect this socket to open port 47998 for our ping thread
firstFrameSocket = connectTcpSocket(&RemoteAddr, RemoteAddrLen,
FIRST_FRAME_PORT, FIRST_FRAME_TIMEOUT_SEC);
if (firstFrameSocket == INVALID_SOCKET) {
return LastSocketError();
}
}
// Start pinging before reading the first frame so GFE knows where
// to send UDP data
err = PltCreateThread(UdpPingThreadProc, NULL, &udpPingThread);
if (err != 0) {
return err;
}
if (ServerMajorVersion == 3) {
// Read the first frame to start the flow of video
err = readFirstFrame();
if (err != 0) {
return err;
}
}
return 0;
}
static void requestInvalidateReferenceFrames(void) {
long long payload[3];
PQUEUED_FRAME_INVALIDATION_TUPLE qfit;
LC_ASSERT(VideoCallbacks.capabilities & CAPABILITY_REFERENCE_FRAME_INVALIDATION);
if (!getNextFrameInvalidationTuple(&qfit)) {
return;
}
LC_ASSERT(qfit->startFrame <= qfit->endFrame);
payload[0] = qfit->startFrame;
payload[1] = qfit->endFrame;
payload[2] = 0;
// Aggregate all lost frames into one range
do {
LC_ASSERT(qfit->endFrame >= payload[1]);
payload[1] = qfit->endFrame;
free(qfit);
} while (getNextFrameInvalidationTuple(&qfit));
// Send the reference frame invalidation request and read the response
if (!sendMessageAndDiscardReply(packetTypes[IDX_INVALIDATE_REF_FRAMES],
payloadLengths[IDX_INVALIDATE_REF_FRAMES], payload)) {
Limelog("Request Invaldiate Reference Frames: Transaction failed: %d\n", (int) LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketError());
return;
}
Limelog("Invalidate reference frame request sent\n");
}
static void UdpPingThreadProc(void* context) {
// Ping in ASCII
char pingData[] = { 0x50, 0x49, 0x4E, 0x47 };
struct sockaddr_in6 saddr;
SOCK_RET err;
memcpy(&saddr, &RemoteAddr, sizeof(saddr));
saddr.sin6_port = htons(RTP_PORT);
// Send PING every second until we get data back then every 5 seconds after that.
while (!PltIsThreadInterrupted(&udpPingThread)) {
err = sendto(rtpSocket, pingData, sizeof(pingData), 0, (struct sockaddr*)&saddr, RemoteAddrLen);
if (err != sizeof(pingData)) {
Limelog("Audio Ping: sendto() failed: %d\n", (int)LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketFail());
return;
}
// Send less frequently if we've received data from our peer
if (receivedDataFromPeer) {
PltSleepMsInterruptible(&udpPingThread, 5000);
}
else {
PltSleepMsInterruptible(&udpPingThread, 1000);
}
}
}
int startAudioStream(void) {
int err;
callbacks.init();
rtpSocket = bindUdpSocket();
if (rtpSocket == INVALID_SOCKET) {
return LastSocketError();
}
err = PltCreateThread(UdpPingThreadProc, NULL, &udpPingThread);
if (err != 0) {
return err;
}
err = PltCreateThread(ReceiveThreadProc, NULL, &receiveThread);
if (err != 0) {
return err;
}
err = PltCreateThread(DecoderThreadProc, NULL, &decoderThread);
if (err != 0) {
return err;
}
callbacks.start();
return 0;
}
static void ReceiveThreadProc(void* context) {
SOCK_RET err;
PRTP_PACKET rtp;
int packetSize;
char* buffer = NULL;
while (!PltIsThreadInterrupted(&receiveThread)) {
if (buffer == NULL) {
buffer = (char*) malloc(MAX_PACKET_SIZE + sizeof(int));
if (buffer == NULL) {
Limelog("Receive thread terminating\n");
listenerCallbacks->connectionTerminated(-1);
return;
}
}
err = recv(rtpSocket, &buffer[sizeof(int)], MAX_PACKET_SIZE, 0);
if (err <= 0) {
Limelog("Receive thread terminating #2\n");
free(buffer);
listenerCallbacks->connectionTerminated(LastSocketError());
return;
}
packetSize = (int)err;
if (packetSize < sizeof(RTP_PACKET)) {
// Runt packet
continue;
}
rtp = (PRTP_PACKET) &buffer[sizeof(int)];
if (rtp->packetType != 97) {
// Not audio
continue;
}
memcpy(buffer, &packetSize, sizeof(int));
err = LbqOfferQueueItem(&packetQueue, buffer);
if (err == LBQ_SUCCESS) {
// The queue owns the buffer now
buffer = NULL;
}
if (err == LBQ_BOUND_EXCEEDED) {
Limelog("Audio packet queue overflow\n");
freePacketList(LbqFlushQueueItems(&packetQueue));
}
else if (err == LBQ_INTERRUPTED) {
Limelog("Receive thread terminating #2\n");
free(buffer);
return;
}
}
}
// UDP Ping proc
static void UdpPingThreadProc(void* context) {
char pingData[] = { 0x50, 0x49, 0x4E, 0x47 };
struct sockaddr_in6 saddr;
SOCK_RET err;
memcpy(&saddr, &RemoteAddr, sizeof(saddr));
saddr.sin6_port = htons(RTP_PORT);
while (!PltIsThreadInterrupted(&udpPingThread)) {
err = sendto(rtpSocket, pingData, sizeof(pingData), 0, (struct sockaddr*)&saddr, RemoteAddrLen);
if (err != sizeof(pingData)) {
Limelog("Video Ping: send() failed: %d\n", (int)LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketError());
return;
}
PltSleepMs(500);
}
}
int enableNoDelay(SOCKET s) {
int err;
int val;
val = 1;
err = setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (char*)&val, sizeof(val));
if (err == SOCKET_ERROR) {
return LastSocketError();
}
return 0;
}
static void lossStatsThreadFunc(void* context) {
char *lossStatsPayload;
BYTE_BUFFER byteBuffer;
lossStatsPayload = malloc(payloadLengths[IDX_LOSS_STATS]);
if (lossStatsPayload == NULL) {
Limelog("Loss Stats: malloc() failed\n");
ListenerCallbacks.connectionTerminated(-1);
return;
}
while (!PltIsThreadInterrupted(&lossStatsThread)) {
// Construct the payload
BbInitializeWrappedBuffer(&byteBuffer, lossStatsPayload, 0, payloadLengths[IDX_LOSS_STATS], BYTE_ORDER_LITTLE);
BbPutInt(&byteBuffer, lossCountSinceLastReport);
BbPutInt(&byteBuffer, LOSS_REPORT_INTERVAL_MS);
BbPutInt(&byteBuffer, 1000);
BbPutLong(&byteBuffer, currentFrame);
BbPutInt(&byteBuffer, 0);
BbPutInt(&byteBuffer, 0);
BbPutInt(&byteBuffer, 0x14);
// Send the message (and don't expect a response)
if (!sendMessageAndForget(packetTypes[IDX_LOSS_STATS],
payloadLengths[IDX_LOSS_STATS], lossStatsPayload)) {
free(lossStatsPayload);
Limelog("Loss Stats: Transaction failed: %d\n", (int)LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketError());
return;
}
// Clear the transient state
lossCountSinceLastReport = 0;
// Wait a bit
PltSleepMs(LOSS_REPORT_INTERVAL_MS);
}
free(lossStatsPayload);
}
SOCKET bindUdpSocket(int addrfamily) {
SOCKET s;
struct sockaddr_storage addr;
int val;
int err;
LC_ASSERT(addrfamily == AF_INET || addrfamily == AF_INET6);
s = socket(addrfamily, SOCK_DGRAM, IPPROTO_UDP);
if (s == INVALID_SOCKET) {
Limelog("socket() failed: %d\n", (int)LastSocketError());
return INVALID_SOCKET;
}
memset(&addr, 0, sizeof(addr));
addr.ss_family = addrfamily;
if (bind(s, (struct sockaddr*) &addr,
addrfamily == AF_INET ?
sizeof(struct sockaddr_in) :
sizeof(struct sockaddr_in6)) == SOCKET_ERROR) {
err = LastSocketError();
Limelog("bind() failed: %d\n", err);
closesocket(s);
SetLastSocketError(err);
return INVALID_SOCKET;
}
#ifdef LC_DARWIN
// Disable SIGPIPE on iOS
val = 1;
setsockopt(s, SOL_SOCKET, SO_NOSIGPIPE, (char* )&val, sizeof(val));
#endif
// Set the receive buffer to 64KB by default
val = 65536;
setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char*) &val, sizeof(val));
return s;
}
void setRecvTimeout(SOCKET s, int timeoutSec) {
#if defined(LC_WINDOWS)
int val = timeoutSec * 1000;
#else
struct timeval val;
val.tv_sec = timeoutSec;
val.tv_usec = 0;
#endif
if (setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, (char*)&val, sizeof(val)) < 0) {
Limelog("setsockopt(SO_RCVTIMEO) failed: %d\n", (int)LastSocketError());
}
}
/* Starts the control stream */
int startControlStream(void) {
int err;
ctlSock = connectTcpSocket(&RemoteAddr, RemoteAddrLen, 47995);
if (ctlSock == INVALID_SOCKET) {
return LastSocketFail();
}
enableNoDelay(ctlSock);
// Send START A
if (!sendMessageAndDiscardReply(packetTypes[IDX_START_A],
payloadLengths[IDX_START_A],
preconstructedPayloads[IDX_START_A])) {
Limelog("Start A failed: %d\n", (int)LastSocketError());
return LastSocketFail();
}
// Send START B
if (!sendMessageAndDiscardReply(packetTypes[IDX_START_B],
payloadLengths[IDX_START_B],
preconstructedPayloads[IDX_START_B])) {
Limelog("Start B failed: %d\n", (int)LastSocketError());
return LastSocketFail();
}
err = PltCreateThread(lossStatsThreadFunc, NULL, &lossStatsThread);
if (err != 0) {
return err;
}
err = PltCreateThread(resyncThreadFunc, NULL, &resyncThread);
if (err != 0) {
return err;
}
return 0;
}
static void resyncThreadFunc(void* context) {
long long payload[3];
while (!PltIsThreadInterrupted(&resyncThread)) {
// Wait for a resync request
PltWaitForEvent(&resyncEvent);
// Form the payload
payload[0] = 0;
payload[1] = 0xFFFFF;
payload[2] = 0;
// Done capturing the parameters
PltClearEvent(&resyncEvent);
// Send the resync request and read the response
if (!sendMessageAndDiscardReply(packetTypes[IDX_RESYNC], payloadLengths[IDX_RESYNC], payload)) {
Limelog("Resync: Transaction failed: %d\n", (int)LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketError());
return;
}
Limelog("Resync complete\n");
}
}
static void UdpPingThreadProc(void *context) {
/* Ping in ASCII */
char pingData[] = { 0x50, 0x49, 0x4E, 0x47 };
struct sockaddr_in saddr;
SOCK_RET err;
memset(&saddr, 0, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_port = htons(RTP_PORT);
memcpy(&saddr.sin_addr, &remoteHost, sizeof(remoteHost));
/* Send PING every 500 milliseconds */
while (!PltIsThreadInterrupted(&udpPingThread)) {
err = sendto(rtpSocket, pingData, sizeof(pingData), 0, (struct sockaddr*)&saddr, sizeof(saddr));
if (err != sizeof(pingData)) {
Limelog("UDP ping thread terminating #1\n");
listenerCallbacks->connectionTerminated(LastSocketError());
return;
}
PltSleepMs(500);
}
}
SOCKET connectTcpSocket(struct sockaddr_storage* dstaddr, SOCKADDR_LEN addrlen, unsigned short port, int timeoutSec) {
SOCKET s;
struct sockaddr_in6 addr;
int err;
#if defined(LC_DARWIN) || defined(FIONBIO)
int val;
#endif
s = socket(dstaddr->ss_family, SOCK_STREAM, IPPROTO_TCP);
if (s == INVALID_SOCKET) {
Limelog("socket() failed: %d\n", (int)LastSocketError());
return INVALID_SOCKET;
}
#ifdef LC_DARWIN
// Disable SIGPIPE on iOS
val = 1;
setsockopt(s, SOL_SOCKET, SO_NOSIGPIPE, (char*)&val, sizeof(val));
#endif
#ifdef FIONBIO
// Enable non-blocking I/O for connect timeout support
val = 1;
ioctlsocket(s, FIONBIO, &val);
#endif
// Start connection
memcpy(&addr, dstaddr, sizeof(addr));
addr.sin6_port = htons(port);
err = connect(s, (struct sockaddr*) &addr, addrlen);
if (err < 0) {
err = (int)LastSocketError();
}
#ifdef FIONBIO
{
struct fd_set writefds, exceptfds;
struct timeval tv;
FD_ZERO(&writefds);
FD_ZERO(&exceptfds);
FD_SET(s, &writefds);
FD_SET(s, &exceptfds);
tv.tv_sec = timeoutSec;
tv.tv_usec = 0;
// Wait for the connection to complete or the timeout to elapse
err = select(s + 1, NULL, &writefds, &exceptfds, &tv);
if (err < 0) {
// select() failed
err = LastSocketError();
Limelog("select() failed: %d\n", err);
closeSocket(s);
SetLastSocketError(err);
return INVALID_SOCKET;
}
else if (err == 0) {
// select() timed out
Limelog("select() timed out after %d seconds\n", timeoutSec);
closeSocket(s);
#if defined(LC_WINDOWS)
SetLastSocketError(WSAEWOULDBLOCK);
#else
SetLastSocketError(EWOULDBLOCK);
#endif
return INVALID_SOCKET;
}
else if (FD_ISSET(s, &writefds) || FD_ISSET(s, &exceptfds)) {
// The socket was signalled
SOCKADDR_LEN len = sizeof(err);
getsockopt(s, SOL_SOCKET, SO_ERROR, (char*)&err, &len);
if (err != 0 || FD_ISSET(s, &exceptfds)) {
// Get the error code
err = (err != 0) ? err : LastSocketFail();
}
}
// Disable non-blocking I/O now that the connection is established
val = 0;
ioctlsocket(s, FIONBIO, &val);
}
#endif
if (err != 0) {
Limelog("connect() failed: %d\n", err);
closeSocket(s);
SetLastSocketError(err);
return INVALID_SOCKET;
}
return s;
}
/* Input thread proc */
static void inputSendThreadProc(void* context) {
SOCK_RET err;
PPACKET_HOLDER holder;
char encryptedBuffer[MAX_INPUT_PACKET_SIZE];
size_t encryptedSize;
while (!PltIsThreadInterrupted(&inputSendThread)) {
int encryptedLengthPrefix;
err = LbqWaitForQueueElement(&packetQueue, (void**) &holder);
if (err != LBQ_SUCCESS) {
return;
}
// If it's a multi-controller packet we can do batching
if (holder->packet.multiController.header.packetType == htonl(PACKET_TYPE_MULTI_CONTROLLER)) {
PPACKET_HOLDER controllerBatchHolder;
PNV_MULTI_CONTROLLER_PACKET origPkt;
int dirs[6];
memset(dirs, 0, sizeof(dirs));
origPkt = &holder->packet.multiController;
for (;;) {
PNV_MULTI_CONTROLLER_PACKET newPkt;
// Peek at the next packet
if (LbqPeekQueueElement(&packetQueue, (void**)&controllerBatchHolder) != LBQ_SUCCESS) {
break;
}
// If it's not a controller packet, we're done
if (controllerBatchHolder->packet.multiController.header.packetType != htonl(PACKET_TYPE_MULTI_CONTROLLER)) {
break;
}
// Check if it's able to be batched
newPkt = &controllerBatchHolder->packet.multiController;
if (newPkt->buttonFlags != origPkt->buttonFlags ||
newPkt->controllerNumber != origPkt->controllerNumber ||
!checkDirs(origPkt->leftTrigger, newPkt->leftTrigger, &dirs[0]) ||
!checkDirs(origPkt->rightTrigger, newPkt->rightTrigger, &dirs[1]) ||
!checkDirs(origPkt->leftStickX, newPkt->leftStickX, &dirs[2]) ||
!checkDirs(origPkt->leftStickY, newPkt->leftStickY, &dirs[3]) ||
!checkDirs(origPkt->rightStickX, newPkt->rightStickX, &dirs[4]) ||
!checkDirs(origPkt->rightStickY, newPkt->rightStickY, &dirs[5])) {
// Batching not allowed
break;
}
// Remove the batchable controller packet
if (LbqPollQueueElement(&packetQueue, (void**)&controllerBatchHolder) != LBQ_SUCCESS) {
break;
}
// Update the original packet
origPkt->leftTrigger = newPkt->leftTrigger;
origPkt->rightTrigger = newPkt->rightTrigger;
origPkt->leftStickX = newPkt->leftStickX;
origPkt->leftStickY = newPkt->leftStickY;
origPkt->rightStickX = newPkt->rightStickX;
origPkt->rightStickY = newPkt->rightStickY;
// Free the batched packet holder
free(controllerBatchHolder);
}
}
// If it's a mouse move packet, we can also do batching
else if (holder->packet.mouseMove.header.packetType == htonl(PACKET_TYPE_MOUSE_MOVE)) {
PPACKET_HOLDER mouseBatchHolder;
int totalDeltaX = (short)htons(holder->packet.mouseMove.deltaX);
int totalDeltaY = (short)htons(holder->packet.mouseMove.deltaY);
for (;;) {
int partialDeltaX;
int partialDeltaY;
// Peek at the next packet
if (LbqPeekQueueElement(&packetQueue, (void**)&mouseBatchHolder) != LBQ_SUCCESS) {
break;
}
// If it's not a mouse move packet, we're done
if (mouseBatchHolder->packet.mouseMove.header.packetType != htonl(PACKET_TYPE_MOUSE_MOVE)) {
break;
}
partialDeltaX = (short)htons(mouseBatchHolder->packet.mouseMove.deltaX);
partialDeltaY = (short)htons(mouseBatchHolder->packet.mouseMove.deltaY);
// Check for overflow
if (partialDeltaX + totalDeltaX > INT16_MAX ||
partialDeltaX + totalDeltaX < INT16_MIN ||
partialDeltaY + totalDeltaY > INT16_MAX ||
partialDeltaY + totalDeltaY < INT16_MIN) {
// Total delta would overflow our 16-bit short
break;
}
// Remove the batchable mouse move packet
if (LbqPollQueueElement(&packetQueue, (void**)&mouseBatchHolder) != LBQ_SUCCESS) {
break;
}
totalDeltaX += partialDeltaX;
totalDeltaY += partialDeltaY;
// Free the batched packet holder
free(mouseBatchHolder);
}
// Update the original packet
holder->packet.mouseMove.deltaX = htons((short)totalDeltaX);
holder->packet.mouseMove.deltaY = htons((short)totalDeltaY);
}
encryptedSize = sizeof(encryptedBuffer);
err = oaes_encrypt(oaesContext, (const unsigned char*) &holder->packet, holder->packetLength,
(unsigned char*) encryptedBuffer, &encryptedSize);
free(holder);
if (err != OAES_RET_SUCCESS) {
Limelog("Input: Encryption failed: %d\n", (int)err);
ListenerCallbacks.connectionTerminated(err);
return;
}
// The first 32-bytes of the output are internal OAES stuff that we want to ignore
encryptedSize -= OAES_DATA_OFFSET;
// Overwrite the last 4 bytes before the encrypted data with the length so
// we can send the message all at once. GFE can choke if it gets the header
// before the rest of the message.
encryptedLengthPrefix = htonl((unsigned long) encryptedSize);
memcpy(&encryptedBuffer[OAES_DATA_OFFSET - sizeof(encryptedLengthPrefix)],
&encryptedLengthPrefix, sizeof(encryptedLengthPrefix));
// Send the encrypted payload
err = send(inputSock, (const char*) &encryptedBuffer[OAES_DATA_OFFSET - sizeof(encryptedLengthPrefix)],
(int)(encryptedSize + sizeof(encryptedLengthPrefix)), 0);
if (err <= 0) {
Limelog("Input: send() failed: %d\n", (int)LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketError());
return;
}
}
}
// Receive thread proc
static void ReceiveThreadProc(void* context) {
int err;
int bufferSize, receiveSize;
char* buffer;
int queueStatus;
receiveSize = StreamConfig.packetSize + MAX_RTP_HEADER_SIZE;
bufferSize = receiveSize + sizeof(int) + sizeof(RTP_QUEUE_ENTRY);
buffer = NULL;
while (!PltIsThreadInterrupted(&receiveThread)) {
PRTP_PACKET packet;
if (buffer == NULL) {
buffer = (char*)malloc(bufferSize);
if (buffer == NULL) {
Limelog("Video Receive: malloc() failed\n");
ListenerCallbacks.connectionTerminated(-1);
return;
}
}
err = recvUdpSocket(rtpSocket, buffer, receiveSize);
if (err < 0) {
Limelog("Video Receive: recvUdpSocket() failed: %d\n", (int)LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketError());
break;
}
else if (err == 0) {
// Receive timed out; try again
continue;
}
memcpy(&buffer[receiveSize], &err, sizeof(int));
// RTP sequence number must be in host order for the RTP queue
packet = (PRTP_PACKET)&buffer[0];
packet->sequenceNumber = htons(packet->sequenceNumber);
queueStatus = RtpqAddPacket(&rtpQueue, packet, (PRTP_QUEUE_ENTRY)&buffer[receiveSize + sizeof(int)]);
if (queueStatus == RTPQ_RET_HANDLE_IMMEDIATELY) {
// queueRtpPacket() copies the data it needs to we can reuse the buffer
queueRtpPacket(packet, err);
}
else if (queueStatus == RTPQ_RET_QUEUED_PACKETS_READY) {
// The packet queue now has packets ready
while ((buffer = (char*)RtpqGetQueuedPacket(&rtpQueue)) != NULL) {
memcpy(&err, &buffer[receiveSize], sizeof(int));
queueRtpPacket((PRTP_PACKET)buffer, err);
free(buffer);
}
}
else if (queueStatus == RTPQ_RET_QUEUED_NOTHING_READY) {
// The queue owns the buffer
buffer = NULL;
}
}
if (buffer != NULL) {
free(buffer);
}
}
static void ReceiveThreadProc(void* context) {
PRTP_PACKET rtp;
PQUEUED_AUDIO_PACKET packet;
int queueStatus;
int useSelect;
int packetsToDrop = 100;
packet = NULL;
if (setNonFatalRecvTimeoutMs(rtpSocket, UDP_RECV_POLL_TIMEOUT_MS) < 0) {
// SO_RCVTIMEO failed, so use select() to wait
useSelect = 1;
}
else {
// SO_RCVTIMEO timeout set for recv()
useSelect = 0;
}
while (!PltIsThreadInterrupted(&receiveThread)) {
if (packet == NULL) {
packet = (PQUEUED_AUDIO_PACKET)malloc(sizeof(*packet));
if (packet == NULL) {
Limelog("Audio Receive: malloc() failed\n");
ListenerCallbacks.connectionTerminated(-1);
break;
}
}
packet->size = recvUdpSocket(rtpSocket, &packet->data[0], MAX_PACKET_SIZE, useSelect);
if (packet->size < 0) {
Limelog("Audio Receive: recvUdpSocket() failed: %d\n", (int)LastSocketError());
ListenerCallbacks.connectionTerminated(LastSocketFail());
break;
}
else if (packet->size == 0) {
// Receive timed out; try again
// If we hit this path, there are no queued audio packets on the host PC,
// so we don't need to drop anything.
packetsToDrop = 0;
continue;
}
if (packet->size < sizeof(RTP_PACKET)) {
// Runt packet
continue;
}
rtp = (PRTP_PACKET)&packet->data[0];
if (rtp->packetType != 97) {
// Not audio
continue;
}
// We've received data, so we can stop sending our ping packets
// as quickly, since we're now just keeping the NAT session open.
receivedDataFromPeer = 1;
// GFE accumulates audio samples before we are ready to receive them,
// so we will drop the first 100 packets to avoid accumulating latency
// by sending audio frames to the player faster than they can be played.
if (packetsToDrop > 0) {
packetsToDrop--;
continue;
}
// RTP sequence number must be in host order for the RTP queue
rtp->sequenceNumber = htons(rtp->sequenceNumber);
queueStatus = RtpqAddPacket(&rtpReorderQueue, (PRTP_PACKET)packet, &packet->q.rentry);
if (RTPQ_HANDLE_NOW(queueStatus)) {
if ((AudioCallbacks.capabilities & CAPABILITY_DIRECT_SUBMIT) == 0) {
if (!queuePacketToLbq(&packet)) {
// An exit signal was received
break;
}
}
else {
decodeInputData(packet);
}
}
else {
if (RTPQ_PACKET_CONSUMED(queueStatus)) {
// The queue consumed our packet, so we must allocate a new one
packet = NULL;
}
if (RTPQ_PACKET_READY(queueStatus)) {
// If packets are ready, pull them and send them to the decoder
while ((packet = (PQUEUED_AUDIO_PACKET)RtpqGetQueuedPacket(&rtpReorderQueue)) != NULL) {
if ((AudioCallbacks.capabilities & CAPABILITY_DIRECT_SUBMIT) == 0) {
if (!queuePacketToLbq(&packet)) {
// An exit signal was received
break;
}
}
else {
decodeInputData(packet);
free(packet);
}
}
// Break on exit
if (packet != NULL) {
break;
}
}
}
}
if (packet != NULL) {
free(packet);
}
}
