Impala Documentation

bool Impala::Core::Stream::Lavc::VideoAccessStrategy::Scan ( ) [inline]

Scans the video for meta-data like bad frames and frame accuracy.

Definition at line 76 of file VideoAccessStrategy.h.

References CleanUp(), HASH_SIZE, ILOG_INFO, mBadFrameCount, mFrames, mLeadingBadFrameCount, mNrOfFrames, mPackets, mScanDataPresent, NrOfFrames(), ResetVideoSrc(), ScanProtected(), and Impala::Core::Table::Table::Size().

Referenced by Impala::Core::Stream::RgbDataSrcLavc::Scan().

00077     {
00078         if (!ResetVideoSrc())
00079             return false;
00080 
00081         ILOG_INFO("Scanning video data...");
00082         mPackets = new PacketTable(1);
00083         mFrames = new FrameTable(Column::ColumnTem<Int32>(1),
00084                              Column::ColumnTem<Int32>(1),
00085                              Column::ColumnTem<Int32>(1),
00086                              Column::ColumnTem<Int32>(1),
00087                              Column::FixedStringColumn(HASH_SIZE, 1));
00088         mNrOfFrames = 0;
00089         mBadFrameCount = 0;
00090         mLeadingBadFrameCount = 0;
00091 
00092         bool scanSuccess = ScanProtected();
00093         ResetVideoSrc();
00094         if (!scanSuccess)
00095         {
00096             CleanUp();
00097             return false;
00098         }
00099 
00100         mScanDataPresent = true;
00101         mNrOfFrames = mFrames->Size();
00102         ILOG_INFO("Finished video scan; frame count established: " << 
00103             NrOfFrames());
00104         return true;
00105     }

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