/**
\fn decodeTillPicture
\brief that one is a bit different compare to goToTime as we
dont want to decode the targetPts if it is a keyframe
but have the frame before
*/
bool ADM_Composer::decodeTillPictureAtPts(uint64_t targetPts,ADMImage *image)
{
// Go to the previous keyframe and decode forward...
uint32_t thisSeg=_currentSegment;
_SEGMENT *seg=_segments.getSegment(_currentSegment);
int ref=seg->_reference;
uint64_t refTime;
if(false==_segments.LinearToRefTime(_currentSegment,targetPts-1,&refTime))
{
ADM_warning("Cannot find ref time\n");
return false;
}
uint64_t previousKf;
if(false==searchPreviousKeyFrameInRef(ref,refTime,&previousKf))
{
ADM_warning("Cannot find previous keyframe in ref %d, time=%"PRIu64" \n",ref,refTime);
return false;
}
// go to it...
if(false==seektoTime(ref,previousKf,false))
{
ADM_warning("Cannot seek to time=%"PRIu64" \n",previousKf);
return false;
}
// Now forward till we reach out frame
while(1)
{
if(false==nextPicture(image,true))
{
ADM_warning("Error in decoding forward");
return false;
}
if(image->Pts>=targetPts)
break;
if(thisSeg!=_currentSegment)
break;
}
if(image->Pts!=targetPts)
{
ADM_error("Could not retrieve our own frame at PTS=%"PRIu64" ms\n",targetPts/1000);
return false;
}
return true;
}
/**
\fn seektoFrame
\brief Seek to frame with timestamp given as arg
*/
bool ADM_Composer::seektoTime(uint32_t ref,uint64_t timeToSeek,bool dontdecode)
{
_VIDEOS *vid=_segments.getRefVideo(ref);
vidHeader *demuxer=vid->_aviheader;
EditorCache *cache =vid->_videoCache;
ADM_assert(cache);
bool found=false;
// Search the previous keyframe for segment....
uint64_t seekTime;
if(_segments.isKeyFrameByTime(ref,timeToSeek))
{
seekTime=timeToSeek;
ADM_info("First frame of the new segment is a keyframe at %"PRIu32"ms\n",seekTime/1000);
found=true;
}else
{
if(false==searchPreviousKeyFrameInRef(ref,timeToSeek,&seekTime))
{
ADM_warning("Cannot identify the keyframe before %"PRIu64" ms\n",seekTime/1000);
return false;
}
}
uint32_t frame=_segments.intraTimeToFrame(ref,seekTime);
if(dontdecode==true)
{
vid->lastSentFrame=frame;
ADM_info("Seek to time without decoding ok\n");
return true;
}
// ok now seek...
if(false==DecodePictureUpToIntra(ref,frame))
{
ADM_warning("Cannot decode up to intra %"PRIu64" at %"PRIu64" ms\n",frame,seekTime/1000);
return false;
}
if(found==true) return true;
// Now forward...
while(nextPictureInternal(ref,NULL)==true)
{
uint64_t pts=vid->lastDecodedPts;
if(pts==ADM_NO_PTS)
{
ADM_warning("No PTS out of decoder\n");
continue;
}
vid->lastReadPts=pts;
if(pts==timeToSeek)
{
ADM_info("Image found, pts=%"PRIu64" ms\n",pts/1000);
return true;
}
if(pts>timeToSeek)
{
ADM_info("Image not found,searching %"PRIu64" ms, got pts=%"PRIu64" ms\n",timeToSeek/1000,pts/1000);
return false;
}
}
ADM_warning("seekToFrame failed for frame at PTS= %"PRIu64" ms, next image failed\n",timeToSeek/1000);
return false;
}
