void FFMPEGMovie::_consume()
{
while( !_stopConsuming )
{
{
std::unique_lock<std::mutex> lock( _targetMutex );
while( !_targetChangedSent )
_targetChanged.wait( lock );
_targetChangedSent = false;
if( _stopConsuming )
return;
if( _seekTo( _targetTimestamp ))
_ptsPosition = UNDEFINED_PTS; // Reset position after seeking
}
PicturePtr frame;
while( !_stopConsuming && _getPtsDelta() >= getFrameDuration() && !isAtEOF( ))
{
frame = _queue.dequeue();
_ptsPosition = _videoStream->getPositionInSec( frame->getTimestamp( ));
}
if( !frame )
{
auto exception = std::runtime_error( "Frame unavailable error" );
_promise.set_exception( std::make_exception_ptr( exception ));
return;
}
_promise.set_value( frame );
}
}
