mpf_activity_detector.h File Reference

MPF Voice Activity Detector. More...

#include "mpf_frame.h"
#include "mpf_codec_descriptor.h"

Typedefs
typedef typedefAPT_BEGIN_EXTERN_C struct mpf_activity_detector_t	mpf_activity_detector_t
Enumerations
enum	mpf_detector_event_e { MPF_DETECTOR_EVENT_NONE, MPF_DETECTOR_EVENT_ACTIVITY, MPF_DETECTOR_EVENT_INACTIVITY, MPF_DETECTOR_EVENT_NOINPUT }
Functions
mpf_activity_detector_t *	mpf_activity_detector_create (apr_pool_t *pool)
void	mpf_activity_detector_reset (mpf_activity_detector_t *detector)
void	mpf_activity_detector_level_set (mpf_activity_detector_t *detector, apr_size_t level_threshold)
void	mpf_activity_detector_noinput_timeout_set (mpf_activity_detector_t *detector, apr_size_t noinput_timeout)
void	mpf_activity_detector_speech_timeout_set (mpf_activity_detector_t *detector, apr_size_t speech_timeout)
void	mpf_activity_detector_silence_timeout_set (mpf_activity_detector_t *detector, apr_size_t silence_timeout)
mpf_detector_event_e	mpf_activity_detector_process (mpf_activity_detector_t detector, const mpf_frame_t frame)

Detailed Description

MPF Voice Activity Detector.

Opaque (voice) activity detector

Events of activity detector

Enumerator:

MPF_DETECTOR_EVENT_NONE	no event occurred
MPF_DETECTOR_EVENT_ACTIVITY	voice activity (transition to activity from inactivity state)
MPF_DETECTOR_EVENT_INACTIVITY	voice inactivity (transition to inactivity from activity state)
MPF_DETECTOR_EVENT_NOINPUT	noinput event occurred

mpf_activity_detector_t* mpf_activity_detector_create ( apr_pool_t * pool )

Create activity detector

void mpf_activity_detector_level_set	(	mpf_activity_detector_t *	detector,
		apr_size_t	level_threshold
	)

Set threshold of voice activity (silence) level

void mpf_activity_detector_noinput_timeout_set	(	mpf_activity_detector_t *	detector,
		apr_size_t	noinput_timeout
	)

Set noinput timeout

mpf_detector_event_e mpf_activity_detector_process	(	mpf_activity_detector_t *	detector,
		const mpf_frame_t *	frame
	)

Process current frame, return detected event if any

void mpf_activity_detector_reset ( mpf_activity_detector_t * detector )

Reset activity detector

void mpf_activity_detector_silence_timeout_set	(	mpf_activity_detector_t *	detector,
		apr_size_t	silence_timeout
	)

Set timeout required to trigger silence (transition from active to inactive state)

void mpf_activity_detector_speech_timeout_set	(	mpf_activity_detector_t *	detector,
		apr_size_t	speech_timeout
	)

Set timeout required to trigger speech (transition from inactive to active state)