void ClientTrickPlayState::updateStateFromNPT(double npt) {
fNPT = (float)npt;
// Map "fNPT" to the corresponding Transport Stream and Index record numbers:
unsigned long tsRecordNum, ixRecordNum;
fIndexFile->lookupTSPacketNumFromNPT(fNPT, tsRecordNum, ixRecordNum);
updateTSRecordNum();
if (tsRecordNum != fTSRecordNum) {
fTSRecordNum = tsRecordNum;
fIxRecordNum = ixRecordNum;
// Seek the source to the new record number:
reseekOriginalTransportStreamSource();
// Note: We assume that we're asked to seek only in normal
// (i.e., non trick play) mode, so we don't seek within the trick
// play source (if any).
fFramer->clearPIDStatusTable();
}
}
void ClientTrickPlayState::updateStateFromNPT(double npt, double streamDuration)
{
fNPT = (float)npt;
// Map "fNPT" to the corresponding Transport Stream and Index record numbers:
unsigned long tsRecordNum, ixRecordNum;
fIndexFile->lookupTSPacketNumFromNPT(fNPT, tsRecordNum, ixRecordNum);
updateTSRecordNum();
if (tsRecordNum != fTSRecordNum)
{
fTSRecordNum = tsRecordNum;
fIxRecordNum = ixRecordNum;
// Seek the source to the new record number:
reseekOriginalTransportStreamSource();
// Note: We assume that we're asked to seek only in normal
// (i.e., non trick play) mode, so we don't seek within the trick
// play source (if any).
fFramer->clearPIDStatusTable();
}
unsigned long numTSRecordsToStream = 0;
if (streamDuration > 0.0)
{
// Use the index file to figure out how many Transport Packets we get to stream:
unsigned long toTSRecordNum, toIxRecordNum;
float toNPT = (float)(fNPT + streamDuration);
fIndexFile->lookupTSPacketNumFromNPT(toNPT, toTSRecordNum, toIxRecordNum);
if (toTSRecordNum > tsRecordNum) // sanity check
{
numTSRecordsToStream = toTSRecordNum - tsRecordNum;
}
}
fFramer->setNumTSPacketsToStream(numTSRecordsToStream);
}