| virtual bool Impala::Core::Stream::Lavc::VideoAccessStrategy::Jump | ( | const UInt64 & | target, | |
| int | flags, | |||
| bool | mustBeKey = false, |
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| int | flush = 0, |
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| PacketTrace * | trace = 0 | |||
| ) | const [inline, protected, virtual] |
Jumps to the specified target and attempts reading the first next (valid) frame; if requested, reading frames will continue until the first next (valid) *key* frame; 'target' is defined by 'flags', which consists of libavformat flags AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE and AVSEEK_FLAG_ANY ( see ffmpeg/avformat.h ).
Definition at line 369 of file VideoAccessStrategy.h.
References DecodeNextValidFrame(), Impala::Core::Stream::Lavc::VideoAccessObject::FlushCodecContext(), mVao, and Impala::Core::Stream::Lavc::VideoAccessObject::Seek().
Referenced by Impala::Core::Stream::Lavc::StrategyIgnoringNativeIndex::IsValidSeekTarget(), JumpToFramePosition(), and JumpValidForFrame().
00371 { 00372 if (flush & 1) // flush before seek 00373 mVao->FlushCodecContext(); 00374 00375 if (!mVao->Seek(target, flags)) 00376 return false; 00377 00378 if (flush & 2) // flush after seek 00379 mVao->FlushCodecContext(); 00380 00381 return DecodeNextValidFrame(mustBeKey, trace); 00382 }
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