void MPEG2TransportFileServerMediaSubsession
::pauseStream(unsigned clientSessionId, void* streamToken) {
if (fIndexFile != NULL) { // we support 'trick play'
ClientTrickPlayState* client = lookupClient(clientSessionId);
if (client != NULL) {
client->updateStateOnPlayChange(False);
}
}
// Call the original, default version of this routine:
OnDemandServerMediaSubsession::pauseStream(clientSessionId, streamToken);
}
void MPEG2TransportFileServerMediaSubsession
::setStreamScale(unsigned clientSessionId, void* streamToken, float scale) {
if (fIndexFile != NULL) { // we support 'trick play'
ClientTrickPlayState* client = lookupClient(clientSessionId);
if (client != NULL) {
client->setNextScale(scale); // scale won't take effect until the next "PLAY"
}
}
// Call the original, default version of this routine:
OnDemandServerMediaSubsession::setStreamScale(clientSessionId, streamToken, scale);
}
void MPEG2TransportFileServerMediaSubsession
::seekStream(unsigned clientSessionId, void* streamToken, float seekNPT) {
if (fIndexFile != NULL) { // we support 'trick play'
ClientTrickPlayState* client = lookupClient(clientSessionId);
if (client != NULL) {
client->updateStateFromNPT(seekNPT);
}
}
// Call the original, default version of this routine:
OnDemandServerMediaSubsession::seekStream(clientSessionId, streamToken, seekNPT);
}
void MPEG2TransportFileServerMediaSubsession
::seekStream(unsigned clientSessionId, void* streamToken, double& seekNPT, double streamDuration, u_int64_t& numBytes) {
// Begin by calling the original, default version of this routine:
OnDemandServerMediaSubsession::seekStream(clientSessionId, streamToken, seekNPT, streamDuration, numBytes);
// Then, special handling specific to indexed Transport Stream files:
if (fIndexFile != NULL) { // we support 'trick play'
ClientTrickPlayState* client = lookupClient(clientSessionId);
if (client != NULL) {
unsigned long numTSPacketsToStream = client->updateStateFromNPT(seekNPT, streamDuration);
numBytes = numTSPacketsToStream*TRANSPORT_PACKET_SIZE;
}
}
}
void MPEG2TransportFileServerMediaSubsession
::startStream(unsigned clientSessionId, void* streamToken, TaskFunc* rtcpRRHandler,
void* rtcpRRHandlerClientData, unsigned short& rtpSeqNum,
unsigned& rtpTimestamp) {
if (fIndexFile != NULL) { // we support 'trick play'
ClientTrickPlayState* client = lookupClient(clientSessionId);
if (client != NULL && client->areChangingScale()) {
// First, handle this like a "PAUSE", except that we back up to the previous VSH
client->updateStateOnPlayChange(True);
OnDemandServerMediaSubsession::pauseStream(clientSessionId, streamToken);
// Then, adjust for the change of scale:
client->updateStateOnScaleChange();
}
}
// Call the original, default version of this routine:
OnDemandServerMediaSubsession::startStream(clientSessionId, streamToken,
rtcpRRHandler, rtcpRRHandlerClientData,
rtpSeqNum, rtpTimestamp);
}
FramedSource *MPEG2TransportFileServerMediaSubsession
::createNewStreamSource(unsigned clientSessionId, unsigned &estBitrate)
{
// Create the video source:
unsigned const inputDataChunkSize
= TRANSPORT_PACKETS_PER_NETWORK_PACKET * TRANSPORT_PACKET_SIZE;
ByteStreamFileSource *fileSource
= ByteStreamFileSource::createNew(envir(), fFileName, inputDataChunkSize);
if (fileSource == NULL) return NULL;
fFileSize = fileSource->fileSize();
// Use the file size and the duration to estimate the stream's bitrate:
if (fFileSize > 0 && fDuration > 0.0)
{
estBitrate = (unsigned)((int64_t)fFileSize / (125 * fDuration) + 0.5); // kbps, rounded
}
else
{
estBitrate = 5000; // kbps, estimate
}
// Create a framer for the Transport Stream:
MPEG2TransportStreamFramer *framer
= MPEG2TransportStreamFramer::createNew(envir(), fileSource);
if (fIndexFile != NULL) // we support 'trick play'
{
// Keep state for this client (if we don't already have it):
ClientTrickPlayState *client = lookupClient(clientSessionId);
if (client == NULL)
{
client = new ClientTrickPlayState(fIndexFile);
fClientSessionHashTable->Add((char const *)clientSessionId, client);
}
client->setSource(framer);
}
return framer;
}
