Impala Documentation

void Impala::Core::Stream::Lavc::VideoAccessStrategy::ReadScanData ( CString fileName ) [inline, protected]

Definition at line 550 of file VideoAccessStrategy.h.

References FrameIsValid(), HASH_SIZE, ILOG_INFO, mBadFrameCount, mFrames, mLeadingBadFrameCount, mNrOfFrames, mPackets, mScanDataPresent, mVideoIsValid, Impala::Util::Read(), Impala::Core::Table::Table::SetEmpty(), and Impala::Core::Table::Table::Size().

00551     {
00552         Util::IOBufferFile buf(fileName, true, false);
00553 
00554         if (mPackets)
00555             mPackets->SetEmpty();
00556         else
00557             mPackets = new PacketTable(1);
00558         Table::Read(mPackets, &buf);
00559         ILOG_INFO("Read " << mPackets->Size() << " packets from file");
00560 
00561         if (mFrames)
00562             mFrames->SetEmpty();
00563         else
00564             mFrames = new FrameTable(Column::ColumnTem<Int32>(1),
00565                                      Column::ColumnTem<Int32>(1),
00566                                      Column::ColumnTem<Int32>(1),
00567                                      Column::ColumnTem<Int32>(1),
00568                                      Column::FixedStringColumn(HASH_SIZE, 1));
00569         Table::Read(mFrames, &buf);
00570         ILOG_INFO("Read " << mFrames->Size() << " frames from file");
00571 
00572         bool oldScanDataPresent = mScanDataPresent;
00573         mScanDataPresent = true;
00574         mNrOfFrames = mFrames->Size();
00575         mBadFrameCount = 0;
00576         mLeadingBadFrameCount = 0;
00577         for (int f = 0; f < mNrOfFrames; f++)
00578             if (!FrameIsValid(f))
00579             {
00580                 mBadFrameCount++;
00581                 if (mBadFrameCount > f)
00582                     mLeadingBadFrameCount++;
00583             }
00584         mVideoIsValid = true;
00585         mScanDataPresent = oldScanDataPresent;
00586     }

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