Ecore Buffer Provider functions

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This group of functions is applied to an Ecore_Buffer_Provider object. Ecore_Buffer_Provider provides Ecore_Buffer to Ecore_Buffer_Consumer(usually different process or thread from Ecore_Buffer_Provider). Ecore_Buffer_Provider should creates Ecore_Buffer as a provider.

Functions
Ecore_Buffer_Provider *	ecore_buffer_provider_new (const char *name)
	Creates a new Buffer Provider based on name.
void	ecore_buffer_provider_free (Ecore_Buffer_Provider *provider)
	Frees an Ecore_Buffer_Provider.
Ecore_Buffer_Return	ecore_buffer_provider_buffer_acquire (Ecore_Buffer_Provider *provider, Ecore_Buffer **ret_buf)
	Returns the Ecore_Buffer released by consumer or State of Queue.
Eina_Bool	ecore_buffer_provider_buffer_enqueue (Ecore_Buffer_Provider *provider, Ecore_Buffer *buffer)
	Submits the Ecore_Buffer to Consumer to request compositing.
Ecore_Buffer_Return	ecore_buffer_provider_buffer_acquirable_check (Ecore_Buffer_Provider *provider)
	Checks if state of queue.
void	ecore_buffer_provider_consumer_add_cb_set (Ecore_Buffer_Provider *provider, Ecore_Buffer_Provider_Consumer_Add_Cb func, void *data)
	Sets a callback for consumer connection events.
void	ecore_buffer_provider_consumer_del_cb_set (Ecore_Buffer_Provider *provider, Ecore_Buffer_Provider_Consumer_Del_Cb func, void *data)
	Sets a callback for consumer disconnection events.
void	ecore_buffer_provider_buffer_released_cb_set (Ecore_Buffer_Provider *provider, Ecore_Buffer_Provider_Enqueue_Cb func, void *data)
	Sets a callback for released buffer events.
Typedefs
typedef struct _Ecore_Buffer_Provider	Ecore_Buffer_Provider
typedef void(*	Ecore_Buffer_Provider_Consumer_Add_Cb )(Ecore_Buffer_Provider *provider, int queue_size, int w, int h, void *data)
	Called whenever a Ecore_Buffer_Consumer connected.
typedef void(*	Ecore_Buffer_Provider_Consumer_Del_Cb )(Ecore_Buffer_Provider *provider, void *data)
	Called whenever a Ecore_Buffer_Consumer disconnected.
typedef void(*	Ecore_Buffer_Provider_Enqueue_Cb )(Ecore_Buffer_Provider *provider, void *data)
	Called whenever a Ecore_Buffer is released.

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Typedef Documentation

Ecore_Buffer_Provider

An object representing a provider of Ecore_Buffer.

Since (EFL) :

1.15

Ecore_Buffer_Provider_Consumer_Add_Cb

Called whenever a Ecore_Buffer_Consumer connected.

Since (EFL) :

1.15

See also:

ecore_buffer_provider_consumer_add_cb_set()

Ecore_Buffer_Provider_Consumer_Del_Cb

Called whenever a Ecore_Buffer_Consumer disconnected.

Since (EFL) :

1.15

See also:

ecore_buffer_provider_consumer_del_cb_set()

Ecore_Buffer_Provider_Enqueue_Cb

Called whenever a Ecore_Buffer is released.

Since (EFL) :

1.15

See also:

ecore_buffer_provider_buffer_released_cb_set()

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Enumeration Type Documentation

enum _Ecore_Buffer_Return

Types for an buffer queue state on provider side.

See also:

ecore_buffer_provider_buffer_acquire()

ecore_buffer_provider_buffer_acquirable_check()

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Function Documentation

Ecore_Buffer_Return ecore_buffer_provider_buffer_acquirable_check

(

Ecore_Buffer_Provider *

provider

)

Checks if state of queue.

Since (EFL) :

1.15

Parameters:

[in]

provider

The Ecore_Buffer_Provider to query

• ECORE_BUFFER_RETURN_NOT_EMPTY, means there is a dequeueable Ecore_Buffer at least one.
• ECORE_BUFFER_RETURN_EMPTY, means queue is empty, not available slot in Queue. in other words, there is no free drawable buffer in Queue.
• ECORE_BUFFER_RETURN_NEED_ALLOC, means that there is available slot, but not allocated. so, You may create new Ecore_Buffer, and then just enqueue the Ecore_Buffer.

Returns:

EINA_TRUE means queue is empty, EINA_FALSE otherwise.

Since :

2.4

Ecore_Buffer_Return ecore_buffer_provider_buffer_acquire	(	Ecore_Buffer_Provider *	provider,
		Ecore_Buffer **	ret_buf
	)

Returns the Ecore_Buffer released by consumer or State of Queue.

Since (EFL) :

1.15

Parameters:

[in]	provider	The Ecore_Buffer_Provider to request for buffer
[out]	ret_buf	A Pointer to the Ecore_Buffer

Returns:

The enumeration of Ecore_Buffer_Return to indicate result of Dequeuing.

This function gives you drawable buffer and inform you the state of Queue. Each return value of enumeration has meaning as below.

• ECORE_BUFFER_RETURN_ERROR, means error occurred.
• ECORE_BUFFER_RETURN_SUCCESS, means success to dequeue, therefore ret_buf is valid.
• ECORE_BUFFER_RETURN_EMPTY, means queue is empty, not available slot in Queue. in other words, there is no free drawable buffer in Queue.
• ECORE_BUFFER_RETURN_NEED_ALLOC, means that there is available slot, but not allocated. so, You may create new Ecore_Buffer, and then just enqueue the Ecore_Buffer.

See also:

ecore_buffer_new(), ecore_buffer_provider_buffer_enqueue()

Since :

2.4

Eina_Bool ecore_buffer_provider_buffer_enqueue	(	Ecore_Buffer_Provider *	provider,
		Ecore_Buffer *	buffer
	)

Submits the Ecore_Buffer to Consumer to request compositing.

Since (EFL) :

1.15

Parameters:

[in]	provider	The Ecore_Buffer_Provider connected with consumer.
[in]	buffer	The Ecore_Buffer to submit

Returns:

EINA_TRUE on success, EINA_FALSE otherwise.

This function allow you to submit the Ecore_Buffer to consumer to request compositing. And this will be success, in case only you submit dequeued Ecore_Buffer, and new Ecore_Buffer after received return value of ECORE_BUFFER_RETURN_NEED_ALLOC by ecore_buffer_provider_buffer_acquire().

See also:

ecore_buffer_new(), ecore_buffer_provider_buffer_dequeue()

Since :

2.4

void ecore_buffer_provider_buffer_released_cb_set	(	Ecore_Buffer_Provider *	provider,
		Ecore_Buffer_Provider_Enqueue_Cb	func,
		void *	data
	)

Sets a callback for released buffer events.

Since (EFL) :

1.15

Parameters:

[in]	provider	The Ecore_Buffer_Provider to set callbacks on
[in]	func	The function to call
[in]	data	A pointer to the user data to store.

A call to this function will set a callback on an Ecore_Buffer_Provider, causing func to be called whenever provider has received Ecore_Buffer released from provider.

You may success dequeue the Ecore_Buffer after this callback called.

Since :

2.4

void ecore_buffer_provider_consumer_add_cb_set	(	Ecore_Buffer_Provider *	provider,
		Ecore_Buffer_Provider_Consumer_Add_Cb	func,
		void *	data
	)

Sets a callback for consumer connection events.

Since (EFL) :

1.15

Parameters:

[in]	provider	The Ecore_Buffer_Provider to set callbacks on
[in]	func	The function to call
[in]	data	A pointer to the user data to store.

A call to this function will set a callback on an Ecore_Buffer_Provider, causing func to be called whenever provider is connected with consumer.

Since :

2.4

void ecore_buffer_provider_consumer_del_cb_set	(	Ecore_Buffer_Provider *	provider,
		Ecore_Buffer_Provider_Consumer_Del_Cb	func,
		void *	data
	)

Sets a callback for consumer disconnection events.

Since (EFL) :

1.15

Parameters:

[in]	provider	The Ecore_Buffer_Provider to set callbacks on
[in]	func	The function to call
[in]	data	A pointer to the user data to store.

A call to this function will set a callback on an Ecore_Buffer_Provider, causing func to be called whenever provider is disconnected with consumer.

Since :

2.4

void ecore_buffer_provider_free

(

Ecore_Buffer_Provider *

provider

)

Frees an Ecore_Buffer_Provider.

Since (EFL) :

1.15

Parameters:

[in]

provider

The Ecore_Buffer_Provider to free

This frees up any memory used by the Ecore_Buffer_Provider.

Since :

2.4

Ecore_Buffer_Provider* ecore_buffer_provider_new

(

const char *

name

)

Creates a new Buffer Provider based on name.

Since (EFL) :

1.15

Parameters:

[in]

name

The name of Buffer_Queue.

Returns:

Ecore_Buffer_Provider instance or NULL if creation failed.

Since :

2.4