void beginQOSMeasurement() {
// Set up a measurement record for each active subsession:
struct timeval startTime;
gettimeofday(&startTime, NULL);
nextQOSMeasurementUSecs = startTime.tv_sec*1000000 + startTime.tv_usec;
qosMeasurementRecord* qosRecordTail = NULL;
MediaSubsessionIterator iter(*session);
MediaSubsession* subsession;
while ((subsession = iter.next()) != NULL) {
RTPSource* src = subsession->rtpSource();
#ifdef SUPPORT_REAL_RTSP
if (session->isRealNetworksRDT) src = (RTPSource*)(subsession->readSource()); // hack
#endif
if (src == NULL) continue;
qosMeasurementRecord* qosRecord
= new qosMeasurementRecord(startTime, src);
if (qosRecordHead == NULL) qosRecordHead = qosRecord;
if (qosRecordTail != NULL) qosRecordTail->fNext = qosRecord;
qosRecordTail = qosRecord;
}
// Then schedule the first of the periodic measurements:
scheduleNextQOSMeasurement();
}
static void periodicQOSMeasurement(void* /*clientData*/) {
struct timeval timeNow;
gettimeofday(&timeNow, NULL);
for (qosMeasurementRecord* qosRecord = qosRecordHead;
qosRecord != NULL; qosRecord = qosRecord->fNext) {
qosRecord->periodicQOSMeasurement(timeNow);
}
// Do this again later:
scheduleNextQOSMeasurement();
}
void beginQOSMeasurement(MediaSession *session, TaskToken qosMeasurementTimerTask, unsigned int qosMeasurementIntervalMS, UsageEnvironment *env) {
// Set up a measurement record for each active subsession:
struct timeval startTime;
gettimeofday(&startTime, NULL);
nextQOSMeasurementUSecs = startTime.tv_sec*1000000 + startTime.tv_usec;
qosMeasurementRecord* qosRecordTail = NULL;
MediaSubsessionIterator iter(*session);
MediaSubsession* subsession;
while ((subsession = iter.next()) != NULL) {
RTPSource* src = subsession->rtpSource();
if (src == NULL) continue;
qosMeasurementRecord* qosRecord
= new qosMeasurementRecord(startTime, src);
if (qosRecordHead == NULL) qosRecordHead = qosRecord;
if (qosRecordTail != NULL) qosRecordTail->fNext = qosRecord;
qosRecordTail = qosRecord;
}
// Then schedule the first of the periodic measurements:
scheduleNextQOSMeasurement(qosMeasurementTimerTask, qosMeasurementIntervalMS, env);
}
