pad.c File Reference

This file contains the streamer element pad implementation. More...

#include "streamer.h"
#include "streamer_api.h"
#include "pad.h"

Functions
static FlowReturn	pad_chain (StreamPad *pad, StreamBuffer *buffer)
	Function for processing the pad chain handler. More...
static FlowReturn	pad_pull (StreamPad *pad, uint32_t offset, uint32_t size, StreamBuffer *buffer)
	Function for processing the pad pull handler. More...
static void	pre_activate (StreamPad *pad, PadScheduling new_mode)
	Pre activation function. More...
static void	post_activate (StreamPad *pad, PadScheduling new_mode)
	Post activation function. More...
static FlowReturn	event_create (StreamEvent *event, EventType type, StreamDataFormat format, uint32_t data)
	Create event to be sent to another pad. More...
FlowReturn	init_pad (StreamPad *pad, void *parent, PadType type)
	Pad initialization function. More...
FlowReturn	deinit_pad (StreamPad *pad)
	Pad deinitialization function. More...
FlowReturn	pad_push (StreamPad *pad, StreamBuffer *buffer)
	Push the data buffer to the peer pad. More...
FlowReturn	pad_pull_range (StreamPad *pad, uint32_t offset, uint32_t size, StreamBuffer *buffer)
	Pull the data buffer from the peer pad. More...
uint8_t	pad_push_event (StreamPad *pad, StreamEvent *event)
	Push event to the peer pad. More...
uint8_t	pad_send_event (StreamPad *pad, StreamEvent *event)
	Send the event to the element where it will be handled by a handler function. More...
uint8_t	activate_pad (StreamPad *pad, uint8_t activate)
	Call the appropriate pad activation function. More...
uint8_t	pad_activate_pull (StreamPad *pad, uint8_t active)
	Pad activation/deactivation in pull mode. More...
uint8_t	pad_activate_push (StreamPad *pad, uint8_t active)
	Pad activation/deactivation in push mode. More...
FlowReturn	event_create_flush_start (StreamEvent *event)
	Create flush start event. More...
FlowReturn	event_create_flush_stop (StreamEvent *event)
	Create flush stop event. More...
FlowReturn	event_create_eos (StreamEvent *event)
	Create end of stream event. More...
FlowReturn	event_create_new_segment (StreamEvent *event, StreamDataFormat format, uint32_t data)
	Create new segment event. More...
FlowReturn	event_create_seek (StreamEvent *event, StreamDataFormat format, uint32_t data)
	Create seek event. More...
uint8_t	pad_query (StreamPad *pad, StreamQuery *query)
	Send a query to a pad. More...
FlowReturn	query_create (StreamQuery *query, StreamInfoType type, StreamDataFormat format, StreamDataType data_type, StreamData *data)
	Create a query for element or pipeline. More...

Function Documentation

pad_chain()

static FlowReturn pad_chain ( StreamPad *  pad, StreamBuffer *  buffer  )

static

Parameters

pad	sink pad that needs to process the chain handler
buffer	buffer to be processed

Returns

FlowReturn

pad_pull()

static FlowReturn pad_pull ( StreamPad *  pad, uint32_t  offset, uint32_t  size, StreamBuffer *  buffer  )

static

Parameters

pad	source pad that needs to process the pull handler
offset	position in the source buffer
size	size to be read
buffer	buffer to be filled

Returns

FlowReturn

pre_activate()

static void pre_activate ( StreamPad *  pad, PadScheduling  new_mode  )

static

Parameters

pad	pad to be activated
new_mode	scheduling mode to be applied

post_activate()

static void post_activate ( StreamPad *  pad, PadScheduling  new_mode  )

static

Parameters

pad	pad to be activated
new_mode	scheduling mode to be applied

event_create()

static FlowReturn event_create ( StreamEvent *  event, EventType  type, StreamDataFormat  format, uint32_t  data  )

static

Parameters

event	event object
type	type of event
format	event format
data	event data

Returns

FlowReturn

init_pad()

FlowReturn init_pad	(	StreamPad *	pad,
		void *	parent,
		PadType	type
	)

Parameters

pad	pad object
parent	parent element object
type	pad type

Returns

FlowReturn

deinit_pad()

FlowReturn deinit_pad

(

StreamPad *

pad

)

Parameters

pad	pad object

Returns

FlowReturn

pad_push()

FlowReturn pad_push	(	StreamPad *	pad,
		StreamBuffer *	buffer
	)

Parameters

pad	pad object
buffer	data buffer

Returns

FlowReturn

pad_pull_range()

FlowReturn pad_pull_range	(	StreamPad *	pad,
		uint32_t	offset,
		uint32_t	size,
		StreamBuffer *	buffer
	)

Parameters

pad	pad object
offset	offset position to be read from
size	size to be read
buffer	data buffer to be filled

Returns

FlowReturn

pad_push_event()

uint8_t pad_push_event	(	StreamPad *	pad,
		StreamEvent *	event
	)

Parameters

pad	pad object
event	event object

Returns

uint8_t

pad_send_event()

uint8_t pad_send_event	(	StreamPad *	pad,
		StreamEvent *	event
	)

Parameters

pad	pad object
event	event object

Returns

uint8_t

activate_pad()

uint8_t activate_pad	(	StreamPad *	pad,
		uint8_t	activate
	)

Parameters

pad	pad object
activate	activation/deactivation flag

Returns

uint8_t

pad_activate_pull()

uint8_t pad_activate_pull	(	StreamPad *	pad,
		uint8_t	active
	)

Parameters

pad	pad object
active	activation/deactivation flag

Returns

uint8_t

pad_activate_push()

uint8_t pad_activate_push	(	StreamPad *	pad,
		uint8_t	active
	)

Parameters

pad	pad object
active	activation/deactivation flag

Returns

uint8_t

event_create_flush_start()

FlowReturn event_create_flush_start

(

StreamEvent *

event

)

Parameters

event

event object

Returns

FlowReturn

event_create_flush_stop()

FlowReturn event_create_flush_stop

(

StreamEvent *

event

)

Parameters

event

event object

Returns

FlowReturn

event_create_eos()

FlowReturn event_create_eos

(

StreamEvent *

event

)

Parameters

event

event object

Returns

FlowReturn

event_create_new_segment()

FlowReturn event_create_new_segment	(	StreamEvent *	event,
		StreamDataFormat	format,
		uint32_t	data
	)

Parameters

event	event object
format	data format
data	data object

Returns

FlowReturn

event_create_seek()

FlowReturn event_create_seek	(	StreamEvent *	event,
		StreamDataFormat	format,
		uint32_t	data
	)

Parameters

event	event object
format	data format
data	data object

Returns

FlowReturn

pad_query()

uint8_t pad_query	(	StreamPad *	pad,
		StreamQuery *	query
	)

Parameters

pad	pad object
query	query object

Returns

uint8_t

query_create()

FlowReturn query_create	(	StreamQuery *	query,
		StreamInfoType	type,
		StreamDataFormat	format,
		StreamDataType	data_type,
		StreamData *	data
	)

Parameters

query	query object to be created
type	type of information to be queried
format	data format
data_type	data type
data	data object

Returns

FlowReturn