What DirectShow uses for data transfer between filters?

StackOverflow https://stackoverflow.com/questions/3048360

  •  27-09-2019
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Question

What does DirectShow use for data transfer between filters? (pipes or what)

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Solution

DirectShow handles data chunks in "media samples", which are simply buffers, implemented through the IMediaSample COM interface. To allocate samples is used a COM-based memory manager, the IMemAllocator interface, that should be implement by filters. To transfer samples is used the method IMemAllocator::GetBuffer.

Fully documented there: Data Flow in the Filter Graph

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