| virtual bool Impala::Core::Stream::Lavc::StrategyIgnoringNativeIndex::ScanProtected | ( | ) | [inline, protected, virtual] |
Implements Impala::Core::Stream::Lavc::VideoAccessStrategy.
Definition at line 45 of file StrategyIgnoringNativeIndex.h.
References Impala::Core::Stream::Lavc::VideoAccessStrategy::CurrentFrameMatchesFrame(), Impala::Core::Stream::Lavc::VideoAccessObject::CurrentFrameToRgb(), Impala::Core::Stream::Lavc::VideoAccessStrategy::DecodeNextValidFrame(), Impala::Core::Stream::Lavc::VideoAccessStrategy::FrameIsKey(), Impala::Core::Stream::Lavc::VideoAccessObject::FrameType(), ILOG_ERROR, ILOG_INFO, Impala::Core::Stream::Lavc::VideoAccessStrategy::mBadFrameCount, Impala::Core::Stream::Lavc::VideoAccessStrategy::mFrames, Impala::Core::Stream::Lavc::VideoAccessStrategy::mLeadingBadFrameCount, Impala::Core::Stream::Lavc::VideoAccessStrategy::mScanDataPresent, Impala::Core::Stream::Lavc::VideoAccessStrategy::mVao, Impala::Core::Stream::Lavc::VideoAccessObject::Reset(), ScanPackets(), and Impala::Core::Table::Table::Size().
00046 { 00047 ILOG_INFO("First scan pass, collecting..."); 00048 bool debug = false; 00049 if (!debug) 00050 ScanPackets(false); 00051 //else 00052 // ReadScanData("scandata"); 00053 //if (!debug) 00054 // WriteScanData("scandata"); 00055 mScanDataPresent = true; 00056 mVao->Reset(); 00057 ILOG_INFO("Second scan pass, validating..."); 00058 if (!debug) 00059 ScanPackets(true); 00060 //else 00061 // ReadScanData("scandata"); 00062 //if (!debug) 00063 // WriteScanData("scandata"); 00064 00065 const int frameCnt = mFrames->Size(); 00066 if (frameCnt <= 0) 00067 { 00068 ILOG_ERROR("No frames found"); 00069 return false; 00070 } 00071 00072 ILOG_INFO("Detected " << mLeadingBadFrameCount << 00073 " leading bad frame(s) and " << mBadFrameCount << 00074 " bad frame(s) in total"); 00075 if (mLeadingBadFrameCount >= frameCnt) 00076 { 00077 ILOG_ERROR("No valid frames found"); 00078 return false; 00079 } 00080 00081 const int firstValidFrameNr = mLeadingBadFrameCount; 00082 if (!FrameIsKey(firstValidFrameNr)) 00083 { 00084 ILOG_ERROR("Unexpected: first valid frame (" << firstValidFrameNr << 00085 ") is not a key frame (type: " << mVao->FrameType() << ")"); 00086 return false; 00087 } 00088 00089 // validate reproduction of first valid key frame's hash 00090 mVao->Reset(); 00091 bool lookForKeyFrame = true; 00092 PacketTrace trace(10); 00093 bool foundFirstKeyFrame = 00094 DecodeNextValidFrame(lookForKeyFrame, &trace); 00095 if (!foundFirstKeyFrame) 00096 { 00097 ILOG_ERROR("Could not locate first valid key frame"); 00098 return false; 00099 } 00100 00101 mVao->CurrentFrameToRgb(); 00102 if (!CurrentFrameMatchesFrame(firstValidFrameNr, &trace)) 00103 { 00104 ILOG_ERROR("Could not reproduce first valid key frame " << 00105 firstValidFrameNr); 00106 return false; 00107 } 00108 00109 return true; 00110 }
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