MFCreateAlignedMemoryBuffer function

Allocates system memory with a specified byte alignment and creates a media buffer to manage the memory.

Syntax

HRESULT MFCreateAlignedMemoryBuffer(
  DWORD          cbMaxLength,
  DWORD          cbAligment,
  IMFMediaBuffer **ppBuffer
);

Parameters

cbMaxLength

Size of the buffer, in bytes.

cbAligment

Specifies the memory alignment for the buffer. Use one of the following constants.

Value Meaning
MF_1_BYTE_ALIGNMENT
0x00000000
Align to 1 bytes.
MF_2_BYTE_ALIGNMENT
0x00000001
Align to 2 bytes.
MF_4_BYTE_ALIGNMENT
0x00000003
Align to 4 bytes.
MF_8_BYTE_ALIGNMENT
0x00000007
Align to 8 bytes.
MF_16_BYTE_ALIGNMENT
0x0000000F
Align to 16 bytes.
MF_32_BYTE_ALIGNMENT
0x0000001F
Align to 32 bytes.
MF_64_BYTE_ALIGNMENT
0x0000003F
Align to 64 bytes.
MF_128_BYTE_ALIGNMENT
0x0000007F
Align to 128 bytes.
MF_256_BYTE_ALIGNMENT
0x000000FF
Align to 256 bytes.
MF_512_BYTE_ALIGNMENT
0x000001FF
Align to 512 bytes.

ppBuffer

Receives a pointer to the IMFMediaBuffer interface of the media buffer. The caller must release the interface.

Return Value

The function returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code Description
S_OK
The function succeeded.

Remarks

When the media buffer object is destroyed, it releases the allocated memory.

Requirements

   
Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows
Header mfapi.h
Library Mfplat.lib
DLL Mfplat.dll

See Also

MFCreateMemoryBuffer

Media Buffers

Media Foundation Functions