MFT_MESSAGE_TYPE Enumeration

Defines messages for a Media Foundation transform (MFT). To send a message to an MFT, call IMFTransform::ProcessMessage.

Syntax

typedef enum _MFT_MESSAGE_TYPE
{
    MFT_MESSAGE_COMMAND_FLUSH = 0,
    MFT_MESSAGE_COMMAND_DRAIN = 0x1,
    MFT_MESSAGE_SET_D3D_MANAGER = 0x2,
    MFT_MESSAGE_DROP_SAMPLES = 0x3,
    MFT_MESSAGE_COMMAND_TICK = 0x4,
    MFT_MESSAGE_NOTIFY_BEGIN_STREAMING = 0x10000000,
    MFT_MESSAGE_NOTIFY_END_STREAMING = 0x10000001,
    MFT_MESSAGE_NOTIFY_END_OF_STREAM = 0x10000002,
    MFT_MESSAGE_NOTIFY_START_OF_STREAM = 0x10000003,
    MFT_MESSAGE_COMMAND_MARKER = 0x20000000
} MFT_MESSAGE_TYPE;  

Constants

Constant	Description
MFT_MESSAGE_COMMAND_FLUSH	Requests the MFT to flush all stored data. See MFT_MESSAGE_COMMAND_FLUSH.
MFT_MESSAGE_COMMAND_DRAIN	Requests the MFT to drain any stored data.See MFT_MESSAGE_COMMAND_DRAIN.
MFT_MESSAGE_SET_D3D_MANAGER	Sets or clears the Direct3D Device Manager for DirectX Video Accereration (DXVA). See MFT_MESSAGE_SET_D3D_MANAGER.
MFT_MESSAGE_DROP_SAMPLES	Note Requires Windows 7.
MFT_MESSAGE_COMMAND_TICK	Note Requires Windows 8.
MFT_MESSAGE_NOTIFY_BEGIN_STREAMING	Notifies the MFT that streaming is about to begin. See MFT_MESSAGE_NOTIFY_BEGIN_STREAMING.
MFT_MESSAGE_NOTIFY_END_STREAMING	Notifies the MFT that streaming is about to end. See MFT_MESSAGE_NOTIFY_END_STREAMING.
MFT_MESSAGE_NOTIFY_END_OF_STREAM	Notifies the MFT that an input stream has ended. See MFT_MESSAGE_NOTIFY_END_OF_STREAM.
MFT_MESSAGE_NOTIFY_START_OF_STREAM	Notifies the MFT that the first sample is about to be processed. See MFT_MESSAGE_NOTIFY_START_OF_STREAM.
MFT_MESSAGE_COMMAND_MARKER	Marks a point in the stream. This message applies only to asynchronous MFTs. See MFT_MESSAGE_COMMAND_MARKER. Note Requires Windows 7

Remarks

Some messages require specific actions from the MFT. These events have “MESSAGE” in the message name. Other messages are informational; they notify the MFT of some action by the client, and do not require any particular response from the MFT. These messages have “NOTIFY” in the messages name. Except where noted, an MFT should not rely on the client sending notification messages.

Requirements

Header: Declared in mftransform.h.