MseqProcess

Board	Supported
Host System	Yes
V4L2	Yes
Clarity UHD	Yes
Concord PoE	No
GenTL	Yes
GevIQ	Yes
GigE Vision	Yes
Indio	No
Iris GTX	Yes
Radient eV-CL	Yes
Rapixo CL	Yes
Rapixo CoF	Yes
Rapixo CXP	Yes
USB3 Vision	Yes

Starts or stops a sequence processing session.

Syntax

void MseqProcess(
    AIL_ID    ContextSeqId,  //in
    AIL_INT64 Command,       //in
    AIL_INT64 CommandFlag    //in
)

Description

This function starts or stops a sequence processing session. The sequence processing session performs the operation specified in the sequence context.

If you define a file (M_FILE) or buffer list (M_BUFFER_LIST) as the source of the input for the operation, the sequence processing session performs the operation as soon as the session is started (M_START). You can specify a synchronous (M_SYNCHRONOUS) or asynchronous (M_ASYNCHRONOUS) operation. For synchronous operations, the application will wait until the operation has finished before executing the next function; whereas, for asynchronous operations, other functions can execute while the operation is performed in a background thread.

If you define an image feed as the source (M_USER_FEED) and call MseqProcess with M_START, the sequence processing session will wait for an image to be queued using MseqFeed. As soon as an image is queued, the sequence processing session operates on it. If no images are queued, the sequence processing session idles and waits for images from MseqFeed. You can only call MseqFeed if the session has been started and set to M_ASYNCHRONOUS.

While you cannot start multiple sequence processing sessions simultaneously for a sequence context, you can allocate multiple sequence contexts and start a separate sequence processing session for each context.

To stop the sequence processing session immediately, without finishing the operation, use M_STOP with M_NULL. To wait for the sequence processing session to complete the operation completely, use M_STOP with M_WAIT.

Note: H.264 video encoding is optimized for Intel CPUs and can be subject to performance and stability issues when used with other CPUs.

Parameters

ContextSeqId (in, AIL_ID)

Specifies the identifier of the sequence context. The sequence context must have been previously allocated using MseqAlloc.

Command (in, AIL_INT64)

Specifies the command to give the sequence processing session.

CommandFlag (in, AIL_INT64)

Specifies the synchronization state of the sequence processing session.

Parameter Associations

For starting or stopping the sequence processing session

---

M_START

Specifies to start the sequence processing session.

Value	Description
M_ASYNCHRONOUS	Specifies for the sequence processing session to run asynchronously. Other functions in your application can execute while the operation is performed in a background thread.
M_SYNCHRONOUS	Specifies for the sequence processing session to run synchronously. Your application will wait until the operation has finished before executing the next function.

---

M_STOP

Specifies to stop the sequence processing session.

Value	Description
M_NULL	Specifies to stop the sequence processing session immediately, cancelling any further sequence processing from occuring.
M_WAIT	Specifies to stop the sequence processing session only after it has finished performing the specified operation.