What does DirectShow use for data transfer between filters? (pipes or what)
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What does DirectShow use for data transfer between filters? (pipes or what)
DirectShow handles data chunks in “media samples”, which are simply buffers, implemented through the
IMediaSampleCOM interface. To allocate samples is used a COM-based memory manager, theIMemAllocatorinterface, that should be implement by filters. To transfer samples is used the methodIMemAllocator::GetBuffer.Fully documented there: Data Flow in the Filter Graph