void TsStreamFileSource::seekToTimeAbsolute(CRefTime& seekTime, CTsDuration& duration)
{
FileReader* reader = (FileReader*)fFid;
double startTime = seekTime.Millisecs();
startTime /= 1000.0f;
LogDebug("StreamingServer:: Seek-> %f/%f", startTime, duration.Duration().Millisecs()/1000.0f);
CTsFileSeek seek(duration);
seek.SetFileReader(reader);
for(int i(0) ; i < 4 ; i++)
{
bool eof = seek.Seek(seekTime);
if (eof)
{
REFERENCE_TIME rollBackTime = reader->GetTimeshift() ? 5000000 : 30000000; // 0.5s/3s
//reached end-of-file, try to seek to an earlier position
if ((seekTime.m_time - rollBackTime) > 0)
{
seekTime.m_time -= rollBackTime;
}
else
{
break; //very short file....
}
}
else
{
break; //we've succeeded
}
}
m_buffer.Clear();
}
//
// Run
//
// Overriden to open the dump file
//
STDMETHODIMP EMReadFrameFilter::Run(REFERENCE_TIME tStart)
{
IReferenceClock *pClock = m_pClock;
CAutoLock cObjectLock(m_pLock);
CRefTime agnusStreamTimeObject;
StreamTime(agnusStreamTimeObject);
long millisekunder = agnusStreamTimeObject.Millisecs();
return CBaseFilter::Run(tStart);
}
//
// SeekDone
//
STDMETHODIMP CDVBSub::SeekDone( CRefTime& rtSeek )
{
// Notify reset observer (clears all cached subtitles on client side)
if( m_pResetObserver )
{
(*m_pResetObserver)();
}
// milliseconds to PCR (90Khz)
m_CurrentSeekPosition = rtSeek.Millisecs() * 90;
LogDebugPTS( "SeekDone", m_CurrentSeekPosition );
return S_OK;
}
void CTsReaderFilter::SeekPreStart(CRefTime& rtAbsSeek)
{
bool doSeek = true;
CTsDuration tsduration=GetDuration();
SetMediaPosition(rtAbsSeek.m_time) ;
//Note that the seek timestamp (m_rtStart) is done in the range
//from earliest - latest from GetAvailable()
//We however would like the seek timestamp to be in the range 0-fileduration
CRefTime rtSeek = rtAbsSeek;
float seekTime = (float)rtSeek.Millisecs();
seekTime /= 1000.0f;
//get the earliest timestamp available in the file
float earliesTimeStamp = 0;
earliesTimeStamp = tsduration.StartPcr().ToClock() - tsduration.FirstStartPcr().ToClock();
if (earliesTimeStamp < 0) earliesTimeStamp = 0;
//correct the seek time
seekTime -= earliesTimeStamp;
if (seekTime < 0) seekTime = 0;
seekTime *= 1000.0f;
rtSeek = CRefTime((LONG)seekTime);
// Now rtSeek contains the "relative" position from "0 to buffer/file duration"
// Should we really seek ?
// Because all skips generated after "Stop()" cause a lot of problem
// This remove all these stupid skips.
if(m_State == State_Stopped)
{
if ((m_bStoppedForUnexpectedSeek || (m_absSeekTime==rtAbsSeek)) && !m_bForceSeekOnStop && !m_bForceSeekAfterRateChange)
{
// LogDebug("CTsReaderFilter::--SeekStart() Stopped state -- No new seek %f",
// (float)rtSeek.Millisecs()/1000.0f);
m_bStoppedForUnexpectedSeek=false ;
m_seekTime = rtSeek ;
m_absSeekTime = rtAbsSeek ;
return ;
}
}
if (((m_absSeekTime==rtAbsSeek) && !m_bStreamCompensated && !m_bForceSeekAfterRateChange) || (m_demultiplexer.IsMediaChanging() && !m_bOnZap && !m_bForceSeekOnStop && !m_bForceSeekAfterRateChange))
{
doSeek = false;
LogDebug("CTsReaderFilter::--SeekStart()-- No new seek %f ( Abs %f / %f ) - Stream compensated: %d, OnZap: %d, Force %d, Media changing: %d",
(float)rtSeek.Millisecs()/1000.0f, (float)rtAbsSeek.Millisecs()/1000.0f, (float)m_duration.EndPcr().ToClock(),m_bStreamCompensated,m_bOnZap,m_bForceSeekOnStop, m_demultiplexer.IsMediaChanging());
// m_bStreamCompensated=false ;
m_bForceSeekOnStop = false ;
}
else
{
LogDebug("CTsReaderFilter::--SeekStart()-- LiveTv : %d, TimeShifting: %d %3.3f ( Abs %f / %f ), OnZap: %d, Force %d, ForceRC %d, Media changing %d",
m_bLiveTv,m_bTimeShifting,(float)rtSeek.Millisecs()/1000.0,(float)rtAbsSeek.Millisecs()/1000.0f, (float)m_duration.EndPcr().ToClock(),m_bOnZap,m_bForceSeekOnStop,m_bForceSeekAfterRateChange,m_demultiplexer.IsMediaChanging());
m_bForceSeekOnStop = false ;
if (m_bForceSeekAfterRateChange)
{
m_bSeekAfterRcDone = true;
m_bForceSeekAfterRateChange = false ;
}
if (m_bTimeShifting)
{
LONG duration = m_duration.Duration().Millisecs() ;
LONG seekTime = rtSeek.Millisecs() ;
if (seekTime + 200 > duration) // End of timeshift buffer requested.
{
if (m_bLiveTv && !m_bAnalog && (m_fileDuration != NULL)) doSeek=false ; // Live & not analog & not RTSP do not seek
m_bLiveTv=true ;
}
else
m_bLiveTv=false ;
LogDebug("Zap to File Seek : %d mS ( %f / %f ) LiveTv : %d, Seek : %d",GetTickCount()-m_lastPause, (float)seekTime/1000.0f, (float)duration/1000.0f, m_bLiveTv, doSeek);
}
m_seekTime=rtSeek ;
m_absSeekTime = rtAbsSeek ;
if (!doSeek && !m_bOnZap) return ;
// m_demultiplexer.SetHoldAudio(true) ;
// m_demultiplexer.SetHoldVideo(true) ;
m_WaitForSeekToEof=1 ; //
m_demultiplexer.CallTeletextEventCallback(TELETEXT_EVENT_SEEK_START,TELETEXT_EVENTVALUE_NONE);
// Stop threads ////
if (GetAudioPin()->IsConnected())
{
//deliver a begin-flush to the codec filter so it stops asking for data
GetAudioPin()->DeliverBeginFlush();
//stop the thread
GetAudioPin()->Stop();
}
if (GetVideoPin()->IsConnected())
{
//deliver a begin-flush to the codec filter so it stops asking for data
GetVideoPin()->DeliverBeginFlush();
//stop the thread
GetVideoPin()->Stop();
}
m_bStreamCompensated=false ;
m_demultiplexer.m_bAudioVideoReady=false ;
if (!m_bOnZap || !m_demultiplexer.IsNewPatReady() || m_bAnalog) // On zapping, new PAT has occured, we should not flush to avoid loosing data.
{ // new PAT has not occured, we should flush to avoid restart with old data.
m_demultiplexer.FlushAudio() ;
m_demultiplexer.FlushVideo() ;
}
m_bOnZap=false ;
// m_demultiplexer.SetHoldAudio(false) ;
// m_demultiplexer.SetHoldVideo(false) ;
//do the seek...
if (doSeek && !m_demultiplexer.IsMediaChanging()&& !m_demultiplexer.IsAudioChanging()) Seek(rtSeek, true);
//tell filter we're done with seeking
// m_pTsReaderFilter->SeekDone(rtSeek);
m_WaitForSeekToEof=0 ; //
if (m_fileDuration != NULL)
{
if (rtSeek >= m_duration.Duration())
{
rtSeek=m_duration.Duration();
}
}
if (GetAudioPin()->IsConnected())
{
// deliver a end-flush to the codec filter so it will start asking for data again
GetAudioPin()->DeliverEndFlush();
// Update m_rtStart in case of has not seeked yet
GetAudioPin()->SetStart(rtAbsSeek) ;
// and restart the thread
GetAudioPin()->Run();
}
if (GetVideoPin()->IsConnected())
{
//deliver a end-flush to the codec filter so it will start asking for data again
GetVideoPin()->DeliverEndFlush();
// Update m_rtStart in case of has not seeked yet
GetVideoPin()->SetStart(rtAbsSeek) ;
// and restart the thread
GetVideoPin()->Run();
}
m_demultiplexer.CallTeletextEventCallback(TELETEXT_EVENT_SEEK_END,TELETEXT_EVENTVALUE_NONE);
if (m_pDVBSubtitle)
{
m_pDVBSubtitle->SetFirstPcr(m_duration.FirstStartPcr().PcrReferenceBase);
m_pDVBSubtitle->SeekDone(rtSeek);
}
}
return ;
}
//*********************************************************
// Seeks in the file to the specific timestamp
// refTime : timestamp. Should be 0 < timestamp < duration
//
// The method will make a guess where the timestamp is located in the file
// and do a PCR seek from there until it finds the correct timestamp
//
bool CTsFileSeek::Seek(CRefTime refTime)
{
double fileDuration=(double)m_duration.Duration().Millisecs();
double seekTimeStamp=(double)refTime.Millisecs();
//sanity checks...
if (seekTimeStamp < 0) seekTimeStamp=0;
//if (seekTimeStamp > fileDuration) seekTimeStamp=fileDuration;
//make a guess where should start looking in the file
double percent=seekTimeStamp/fileDuration;
__int64 filePos=(__int64)(m_reader->GetFileSize()*percent);
filePos/=188;
filePos*=188;
seekTimeStamp /= 1000.0f; // convert to seconds.
m_seekPid=m_duration.GetPid();
LogDebug("FileSeek: seek to %f filepos:%x pid:%x", seekTimeStamp,(DWORD)filePos, m_seekPid);
byte buffer[188*10];
__int64 binaryMax=m_reader->GetFileSize();
__int64 binaryMin=0;
__int64 lastFilePos=0;
int seekingIteration=0;
__int64 firstFilePos=filePos;
int noPCRIteration=0;
bool noPCRloop = false;
Reset() ; // Reset "PacketSync"
while (true)
{
//sanity checks
if (filePos<=0)
{
//no need to seek for timestamp 0,
//simply set the pointer at the beginning of the file
m_reader->SetFilePointer(0,FILE_BEGIN);
return false;
}
if (filePos+sizeof(buffer) > m_reader->GetFileSize())
{
//no need to seek when we want to seek to end of file
//simply set the pointer at the end of the file
m_reader->SetFilePointer(0,FILE_END);
return false;
}
//set filepointer to filePos
m_reader->SetFilePointer(filePos,FILE_BEGIN);
//read buffer from file at position filePos
DWORD dwBytesRead;
if (!SUCCEEDED(m_reader->Read(buffer, sizeof(buffer),&dwBytesRead)))
{
LogDebug("FileSeek: read failed at filePos: %x - target time: %f, iterations: %d", (DWORD)filePos, seekTimeStamp, seekingIteration);
return true;
}
if (dwBytesRead <= 0) //end-of-file
{
LogDebug("FileSeek: end-of-file at filePos: %x - target time: %f, iterations: %d", (DWORD)filePos, seekTimeStamp, seekingIteration);
return true;
}
//process data
m_pcrFound.Reset();
OnRawData2(buffer,dwBytesRead);
//did we find a pcr?
if (m_pcrFound.IsValid)
{
//yes. pcr found
double clockFound=m_pcrFound.ToClock();
double diff = clockFound - seekTimeStamp;
//LogDebug(" got %f at filepos %x diff %f ( %I64x, %I64x )", clockFound, (DWORD)filePos, diff, binaryMin, binaryMax);
// Make sure that seeking position is at least the target one
if (0 <= diff && diff <= SEEKING_ACCURACY)
{
LogDebug("FileSeek: stop seek: %f at %x - target: %f, diff: %f, iterations: %d",
clockFound, (DWORD)filePos, seekTimeStamp, diff, seekingIteration);
m_reader->SetFilePointer(filePos,FILE_BEGIN);
return false;
}
noPCRIteration = 0;
seekingIteration++;
if( seekingIteration > MAX_SEEKING_ITERATIONS )
{
LogDebug("FileSeek: stop seek max iterations reached (%d): %f at %x - target: %f, diff: %f",
MAX_SEEKING_ITERATIONS, clockFound, (DWORD)filePos, seekTimeStamp, diff);
if (fabs(diff) < 2.0)
{
m_reader->SetFilePointer(filePos,FILE_BEGIN);
}
else
{
//Set the file pointer to the initial estimate - the best we can do...
m_reader->SetFilePointer(firstFilePos,FILE_BEGIN);
}
return false;
}
// lower bound becomes valid
if( clockFound > seekTimeStamp )
{
if (filePos < binaryMax) binaryMax = filePos-1;
}
else
{
if (filePos > binaryMin) binaryMin = filePos+1;
}
lastFilePos=filePos;
filePos = binaryMin + ( binaryMax - binaryMin ) / 2;
filePos/=188;
filePos*=188;
if (lastFilePos==filePos)
{
LogDebug("FileSeek: stop seek closer target found : %f at %x - target: %f, diff: %f",
clockFound, (DWORD)filePos, seekTimeStamp, diff);
m_reader->SetFilePointer(filePos,FILE_BEGIN);
return false;
}
Reset() ; // Random jump, Reset "PacketSync"
}
else // no first PCR
{
//move filepointer forward and continue searching for a PCR
filePos += sizeof(buffer);
noPCRIteration++;
if (noPCRIteration > MAX_BUFFER_ITERATIONS)
{
if (noPCRloop) //second time this has happened
{
LogDebug("FileSeek: stop seek, no PCR found, max iterations reached (%d)", MAX_BUFFER_ITERATIONS);
//Set the file pointer to the initial estimate - the best we can do...
m_reader->SetFilePointer(firstFilePos,FILE_BEGIN);
return false;
}
//Let's try looking for any PCR pid
//starting again from the initial position
LogDebug("FileSeek: No PCR found (pid = %d), trying for any PCR pid", m_seekPid);
m_seekPid = -1;
filePos = firstFilePos;
noPCRIteration = 0;
noPCRloop = true;
}
}
}
return false;
}
