asrc_internal.h File Reference

Data Structures
struct	asrc_itf_data_s

Functions
void	__pi_asrc_conf_init (struct pi_asrc_conf *conf)
	Init asrc configuration structure. More...
int32_t	__pi_asrc_open (struct pi_asrc_conf *conf, struct asrc_itf_data_s **device_data)
	Open asrc device. More...
void	__pi_asrc_close (struct asrc_itf_data_s *itf_data)
	Close asrc device. More...
int32_t	__pi_asrc_convert_async (struct asrc_itf_data_s *itf_data, void *src, void *dst, pi_task_t *task)
	Convert sample rate. More...

Function Documentation

void __pi_asrc_close

(

struct asrc_itf_data_s *

itf_data

)

Parameters

asrc_id

ID of asrc interface.

References asrc_itf_data_s::device_id, hal_udma_ctrl_cg_enable(), hal_udma_ctrl_reset_clear(), asrc_itf_data_s::nb_open, pi_fc_l1_free(), and UDMA_ASRC_ID.

Referenced by pi_asrc_close().

void __pi_asrc_conf_init

(

struct pi_asrc_conf *

conf

)

Parameters

conf	Pointer to asrc conf.

Referenced by pi_asrc_conf_init().

int32_t __pi_asrc_convert_async	(	struct asrc_itf_data_s *	itf_data,
		void *	src,
		void *	dst,
		pi_task_t *	task
	)

Parameters

itf_data	Pointer to driver data.
src	Stream data source.
dst	Stream data dest.
task	Pointer to struct pi_task.

References __pi_asrc_conversion_start(), pi_task_t::data, disable_irq(), asrc_itf_data_s::fifo_head, asrc_itf_data_s::fifo_tail, pi_task_t::next, and restore_irq().

Referenced by pi_asrc_convert_async().

int32_t __pi_asrc_open	(	struct pi_asrc_conf *	conf,
		struct asrc_itf_data_s **	device_data
	)

Parameters

conf	Pointer to asrc conf.
device_data	Pointer to device data.

Return values

0	Operation is successful.
ERRNO	Error code.

References __pi_asrc_conf_apply(), ASRC_TRACE, ASRC_TRACE_ERR, asrc_itf_data_s::channels, asrc_itf_data_s::device_id, asrc_itf_data_s::fifo_head, asrc_itf_data_s::fifo_tail, asrc_itf_data_s::fs_in, asrc_itf_data_s::fs_out, hal_udma_ctrl_cg_disable(), hal_udma_ctrl_reset_set(), asrc_itf_data_s::lane_id, asrc_itf_data_s::nb_open, asrc_itf_data_s::options, pi_fc_l1_malloc(), udma_asrc, UDMA_ASRC_ID, and udma_ctrl.

Referenced by pi_asrc_open().