void OnDemandServerMediaSubsession::seekStream(unsigned /*clientSessionId*/,
					       void* streamToken, char*& absStart, char*& absEnd) {
  // Seeking isn't allowed if multiple clients are receiving data from the same source:
  if (fReuseFirstSource) return;

  StreamState* streamState = (StreamState*)streamToken;
  if (streamState != NULL && streamState->mediaSource() != NULL) {
    seekStreamSource(streamState->mediaSource(), absStart, absEnd);
  }
}
void EncoderMediaSubsession::seekStream(unsigned /*clientSessionId*/,
		void* streamToken, double seekNPT) {
	// Seeking isn't allowed if multiple clients are receiving data from
	// the same source:
	if (fReuseFirstSource) return;

	StreamState* streamState = (StreamState*)streamToken;
	if (streamState != NULL && streamState->mediaSource() != NULL) {
		seekStreamSource(streamState->mediaSource(), seekNPT);
	}
}
void OnDemandServerMediaSubsession::seekStream(unsigned /*clientSessionId*/,
					       void* streamToken, double& seekNPT, double streamDuration, u_int64_t& numBytes) {
  numBytes = 0; // by default: unknown

  // Seeking isn't allowed if multiple clients are receiving data from
  // the same source:
  if (fReuseFirstSource) return;

  StreamState* streamState = (StreamState*)streamToken;
  if (streamState != NULL && streamState->mediaSource() != NULL) {
    seekStreamSource(streamState->mediaSource(), seekNPT, streamDuration, numBytes);
  }
}
void OnDemandServerMediaSubsession::seekStream(unsigned /*clientSessionId*/,
					       void* streamToken, double& seekNPT, double streamDuration, u_int64_t& numBytes) {
  numBytes = 0; // by default: unknown

  // Seeking isn't allowed if multiple clients are receiving data from the same source:
  if (fReuseFirstSource) return;

  StreamState* streamState = (StreamState*)streamToken;
  if (streamState != NULL && streamState->mediaSource() != NULL) {
    seekStreamSource(streamState->mediaSource(), seekNPT, streamDuration, numBytes);

    streamState->startNPT() = (float)seekNPT;
    RTPSink* rtpSink = streamState->rtpSink(); // alias
    if (rtpSink != NULL) rtpSink->resetPresentationTimes();
  }
}