audio_proc.c File Reference

This file contains the implementation for the AudioProc integration. More...

#include <string.h>
#include "audio_proc.h"
#include "pipeline.h"
#include "streamer_element_properties.h"

Functions
static uint8_t	audio_proc_sink_pad_activation_handler (StreamPad *pad, uint8_t active)
	This function activates the pad and allocates memory for the AudioProc element. More...
static FlowReturn	audio_proc_sink_pad_chain_handler (StreamPad *pad, StreamBuffer *buf)
	This pad function takes data from the source element and pushes it onto the AUDIO_PROC library. More...
static uint8_t	audio_proc_sink_pad_event_handler (StreamPad *pad, StreamEvent *event)
	This function processes the pad events. More...
static int32_t	audio_proc_change_state (StreamElement *element_ptr, PipelineState new_state)
	This function changes the AUDIO_PROC state and calls the appropriate apis for that state and takes the actions and then returns. PipelineState Transition: NULL to READY: Nothing to do READY to PAUSE: Activate sink pads and their peer pads PAUSE to PLAY: Start Writing PAUSE to READY: Deactivate sink pads and their peer pads READY to NULL: Nothing to do. More...
static uint8_t	audio_proc_sink_pad_query_handler (StreamPad *pad, StreamQuery *query)
	This pad function handles query from the pipeline. If not able to handle the query then it pushes the query to its peer. More...
static uint8_t	audio_proc_src_pad_query_handler (StreamPad *pad, StreamQuery *query)
	audio_proc_src_pad_query_handler More...
static uint8_t	audio_proc_src_pad_event_handler (StreamPad *pad, StreamEvent *event)
	audio_proc_src_pad_event_handler More...
static FlowReturn	audio_proc_src_pull_handler (StreamPad *pad, StreamBuffer *buffer, uint32_t size, uint32_t offset)
	Empty AUDIO_PROC src pull handler function. More...
static int32_t	audio_proc_set_property (StreamElement *element_ptr, uint16_t prop, uint32_t val)
	This function sets AUDIO_PROC element's properties. More...
static int32_t	audio_proc_get_property (StreamElement *element_ptr, uint16_t prop, uint32_t *val_ptr)
	This function gets AUDIO_PROC element's properties. More...
int32_t	audio_proc_init_element (StreamElement *element_ptr)
	This function initializes the audio_proc element and pads. More...
int32_t	audio_proc_set_buffer (ElementHandle element_hdl, char *location_ptr, uint32_t size)
	Set the location of the memory buffer to write to as well as the size. More...
int32_t	audio_proc_register_ext_processing (ElementHandle element, AudioProcInitFunc init_func_ptr, AudioProcPostProcFunc proc_func_ptr, AudioProcDeinitFunc deinit_func_ptr, void *arg_ptr)
	Register function pointers and arguments. More...

Function Documentation

audio_proc_sink_pad_activation_handler()

static uint8_t audio_proc_sink_pad_activation_handler ( StreamPad *  pad, uint8_t  active  )

static

Parameters

pad	pad handle
active	boolean activate/disactivate pad

Returns

true/false

Return values

true	success
false	failed

audio_proc_sink_pad_chain_handler()

static FlowReturn audio_proc_sink_pad_chain_handler ( StreamPad *  pad, StreamBuffer *  buf  )

static

Parameters

pad	pad handle
buf	input buffer

Returns

FlowReturn

Return values

FLOW_OK	success
FLOW_UNEXPECTED	bad paramesters
FLOW_ERROR	write failed

audio_proc_sink_pad_event_handler()

static uint8_t audio_proc_sink_pad_event_handler ( StreamPad *  pad, StreamEvent *  event  )

static

Parameters

pad	pad handle
event	event enumeration

Returns

true/false

Return values

true	success
false	failed

audio_proc_change_state()

static int32_t audio_proc_change_state ( StreamElement *  element_ptr, PipelineState  new_state  )

static

Parameters

element_ptr	element
new_state	audio_proc state to be changed

Returns

StreamReturnType

Return values

STREAM_OK	success
STREAM_ERR_INVALID_ARGS	invalid arguments

audio_proc_sink_pad_query_handler()

static uint8_t audio_proc_sink_pad_query_handler ( StreamPad *  pad, StreamQuery *  query  )

static

Parameters

pad	pad handle
query	input buffer

Returns

: true/false

audio_proc_src_pad_query_handler()

static uint8_t audio_proc_src_pad_query_handler ( StreamPad *  pad, StreamQuery *  query  )

static

This pad function handles query from the pipeline. If not able to handle the query then it pushes the query to its peer.

Parameters

pad	pad handle
query	input buffer

Returns

: true/false

audio_proc_src_pad_event_handler()

static uint8_t audio_proc_src_pad_event_handler ( StreamPad *  pad, StreamEvent *  event  )

static

This pad function handles events from the pipeline. If not able to handle the event then it pushes the event to its peer.

Parameters

pad	pad handle
event	input buffer

Returns

: true/false

audio_proc_src_pull_handler()

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

static

Parameters

pad	Pad pointer
buffer	Buffer pointer
size	Size
offset	Offset

Returns

FlowReturn

audio_proc_set_property()

static int32_t audio_proc_set_property ( StreamElement *  element_ptr, uint16_t  prop, uint32_t  val  )

static

Parameters

element_ptr	AUDIO_PROC element instance
prop	audio_proc element property
val	value pointer

Returns

StreamReturnType

Return values

STREAM_OK	success
STREAM_ERR_INFO_ABSENT	unknown property
STREAM_GENERAL	bad status to set the property

audio_proc_get_property()

static int32_t audio_proc_get_property ( StreamElement *  element_ptr, uint16_t  prop, uint32_t *  val_ptr  )

static

Parameters

element_ptr	AUDIO_PROC element instance
prop	audio_proc element property
val_ptr	value pointer

Returns

AudioSinkStreamErrorType

Return values

STREAM_OK	success
STREAM_ERR_INVALID_ARGS	bad arguments
STREAM_ERR_INFO_ABSENT	unknown property

audio_proc_init_element()

int32_t audio_proc_init_element

(

StreamElement *

element_ptr

)

Parameters

element_ptr

pointer of audio_proc element instance

Returns

StreamReturnType

Return values

STREAM_OK	success
STREAM_ERR_ELEMENT_NOT_FOUND	invalid instance pointer of element_ptr

audio_proc_set_buffer()

int32_t audio_proc_set_buffer	(	ElementHandle	element_hdl,
		char *	location_ptr,
		uint32_t	size
	)

Parameters

element_hdl	element handle
location_ptr	location path
size	buffer size

Returns

StreamReturnType

Return values

STREAM_OK	success
STREAM_ERR_INVALID_ARGS	invalid parameters
STREAM_ERR_GENERAL	status is bigger than or eque to STATE_PAUSED

audio_proc_register_ext_processing()

int32_t audio_proc_register_ext_processing	(	ElementHandle	element,
		AudioProcInitFunc	init_func_ptr,
		AudioProcPostProcFunc	proc_func_ptr,
		AudioProcDeinitFunc	deinit_func_ptr,
		void *	arg_ptr
	)

Parameters

element	audio_proc element handle
init_func_ptr	initialization function pointer
proc_func_ptr	processing function pointer
deinit_func_ptr	deinit function pointer
arg_ptr	arguments pointer

Returns

STREAM_OK

STREAM_ERR_INVALID_ARGS