MMAL_BUFFER_HEADER_PRIVATE_T Struct Reference

#include <mmal_buffer_private.h>

List of all members.

Public Attributes
MMAL_BH_PRE_RELEASE_CB_T	pf_pre_release
void *	pre_release_userdata
void(*	pf_release )(struct MMAL_BUFFER_HEADER_T *header)
void *	owner
int32_t	refcount
MMAL_BUFFER_HEADER_T *	reference
void(*	pf_payload_free )(void *payload_context, void *payload)
void *	payload
void *	payload_context
uint32_t	payload_size
void *	component_data
void *	payload_handle
uint8_t	driver_area [MMAL_DRIVER_BUFFER_SIZE]

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Detailed Description

Typedef for the framework's private area in the buffer header

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Member Data Documentation

void* MMAL_BUFFER_HEADER_PRIVATE_T::component_data

Field reserved for use by the component

void* MMAL_BUFFER_HEADER_PRIVATE_T::owner

Context set by the allocator of the buffer header and passed during the release callback

void* MMAL_BUFFER_HEADER_PRIVATE_T::payload

Pointer / handle to the allocated payload buffer

void* MMAL_BUFFER_HEADER_PRIVATE_T::payload_context

Pointer to the context of the payload allocator

void* MMAL_BUFFER_HEADER_PRIVATE_T::payload_handle

Field reserved for mmal_buffer_header_mem_lock

uint32_t MMAL_BUFFER_HEADER_PRIVATE_T::payload_size

Allocated size in bytes of payload buffer

void(* MMAL_BUFFER_HEADER_PRIVATE_T::pf_payload_free)(void *payload_context, void *payload)

Callback used to free the payload associated with this buffer header. This is only used if the buffer header was created by MMAL with a payload associated with it.

MMAL_BH_PRE_RELEASE_CB_T MMAL_BUFFER_HEADER_PRIVATE_T::pf_pre_release

Callback invoked just prior to actually releasing the buffer header. Returns TRUE if release should be delayed.

void(* MMAL_BUFFER_HEADER_PRIVATE_T::pf_release)(struct MMAL_BUFFER_HEADER_T *header)

Callback used to release / recycle the buffer header. This needs to be set by whoever allocates the buffer header.

int32_t MMAL_BUFFER_HEADER_PRIVATE_T::refcount

Reference count of the buffer header. When it reaches 0, the release callback will be called.

MMAL_BUFFER_HEADER_T* MMAL_BUFFER_HEADER_PRIVATE_T::reference

Reference to another acquired buffer header.

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

• /home/jvcleave/Desktop/RASPBERRY_PI/userland/interface/mmal/core/mmal_buffer_private.h