| virtual bool Impala::Core::Stream::Lavc::StrategyIgnoringNativeIndex::ScanProtected | ( | ) | [inline, protected, virtual] |
Implements Impala::Core::Stream::Lavc::VideoAccessStrategy.
Definition at line 46 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().
00047 { 00048 ILOG_INFO("First scan pass, collecting..."); 00049 bool debug = false; 00050 if (!debug) 00051 ScanPackets(false); 00052 //else 00053 // ReadScanData("scandata"); 00054 //if (!debug) 00055 // WriteScanData("scandata"); 00056 mScanDataPresent = true; 00057 mVao->Reset(); 00058 ILOG_INFO("Second scan pass, validating..."); 00059 if (!debug) 00060 ScanPackets(true); 00061 //else 00062 // ReadScanData("scandata"); 00063 //if (!debug) 00064 // WriteScanData("scandata"); 00065 00066 const int frameCnt = mFrames->Size(); 00067 if (frameCnt <= 0) 00068 { 00069 ILOG_ERROR("No frames found"); 00070 return false; 00071 } 00072 00073 ILOG_INFO("Detected " << mLeadingBadFrameCount << 00074 " leading bad frame(s) and " << mBadFrameCount << 00075 " bad frame(s) in total"); 00076 if (mLeadingBadFrameCount >= frameCnt) 00077 { 00078 ILOG_ERROR("No valid frames found"); 00079 return false; 00080 } 00081 00082 const int firstValidFrameNr = mLeadingBadFrameCount; 00083 if (!FrameIsKey(firstValidFrameNr)) 00084 { 00085 ILOG_ERROR("Unexpected: first valid frame (" << firstValidFrameNr << 00086 ") is not a key frame (type: " << mVao->FrameType() << ")"); 00087 return false; 00088 } 00089 00090 // validate reproduction of first valid key frame's hash 00091 mVao->Reset(); 00092 bool lookForKeyFrame = true; 00093 PacketTrace trace(10); 00094 bool foundFirstKeyFrame = 00095 DecodeNextValidFrame(lookForKeyFrame, &trace); 00096 if (!foundFirstKeyFrame) 00097 { 00098 ILOG_ERROR("Could not locate first valid key frame"); 00099 return false; 00100 } 00101 00102 mVao->CurrentFrameToRgb(); 00103 if (!CurrentFrameMatchesFrame(firstValidFrameNr, &trace)) 00104 { 00105 ILOG_ERROR("Could not reproduce first valid key frame " << 00106 firstValidFrameNr); 00107 return false; 00108 } 00109 00110 return true; 00111 }
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