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CBaseAllocator::m_lPrefix member

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Prefix of each buffer, in bytes. If the value is non-zero, each buffer pointer returned by the CBaseAllocator::GetBuffer method is preceded by a block of bytes of size m_lPrefix. This memory block is called the prefix. The CBaseAllocator::m_lSize member variable does not include the prefix value.

Syntax

long m_lPrefix;

Requirements

Requirement Value
Header
Amfilter.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

See also

CBaseAllocator Class