v4l2_m2m_ops Struct Reference

#include <v4l2-mem2mem.h>

Data Fields
void(*	device_run )(void *priv)
int(*	job_ready )(void *priv)
void(*	job_abort )(void *priv)
void(*	lock )(void *priv)
void(*	unlock )(void *priv)

Detailed Description

struct v4l2_m2m_ops - mem-to-mem device driver callbacks : required. Begin the actual job (transaction) inside this callback. The job does NOT have to end before this callback returns (and it will be the usual case). When the job finishes, v4l2_m2m_job_finish() has to be called. : optional. Should return 0 if the driver does not have a job fully prepared to run yet (i.e. it will not be able to finish a transaction without sleeping). If not provided, it will be assumed that one source and one destination buffer are all that is required for the driver to perform one full transaction. This method may not sleep. : required. Informs the driver that it has to abort the currently running transaction as soon as possible (i.e. as soon as it can stop the device safely; e.g. in the next interrupt handler), even if the transaction would not have been finished by then. After the driver performs the necessary steps, it has to call v4l2_m2m_job_finish() (as if the transaction ended normally). This function does not have to (and will usually not) wait until the device enters a state when it can be stopped.

Definition at line 44 of file v4l2-mem2mem.h.

Field Documentation

void(* device_run)(void *priv)

Definition at line 45 of file v4l2-mem2mem.h.

void(* job_abort)(void *priv)

Definition at line 47 of file v4l2-mem2mem.h.

int(* job_ready)(void *priv)

Definition at line 46 of file v4l2-mem2mem.h.

void(* lock)(void *priv)

Definition at line 48 of file v4l2-mem2mem.h.

void(* unlock)(void *priv)

Definition at line 49 of file v4l2-mem2mem.h.

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The documentation for this struct was generated from the following file:

• include/media/v4l2-mem2mem.h