61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/*
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* Copyright 2008 Arsen Chaloyan
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __MPF_ACTIVITY_DETECTOR_H__
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#define __MPF_ACTIVITY_DETECTOR_H__
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/**
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* @file mpf_activity_detector.h
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* @brief MPF Voice Activity Detector
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*/
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#include "mpf_frame.h"
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#include "mpf_codec.h"
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APT_BEGIN_EXTERN_C
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/** Opaque (voice) activity detector */
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typedef struct mpf_activity_detector_t mpf_activity_detector_t;
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/** Events of activity detector */
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typedef enum {
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MPF_DETECTOR_EVENT_NONE, /**< no event occurred */
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MPF_DETECTOR_EVENT_ACTIVITY, /**< voice activity (transition to activity from inactivity state) */
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MPF_DETECTOR_EVENT_INACTIVITY, /**< voice inactivity (transition to inactivity from activity state) */
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MPF_DETECTOR_EVENT_NOINPUT /**< noinput event occurred */
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} mpf_detector_event_e;
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/** Create activity detector */
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MPF_DECLARE(mpf_activity_detector_t*) mpf_activity_detector_create(apr_pool_t *pool);
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/** Set threshold of voice activity (silence) level */
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MPF_DECLARE(void) mpf_activity_detector_level_set(mpf_activity_detector_t *detector, apr_size_t level_threshold);
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/** Set noinput timeout */
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MPF_DECLARE(void) mpf_activity_detector_noinput_timeout_set(mpf_activity_detector_t *detector, apr_size_t noinput_timeout);
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/** Set transition complete timeout */
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MPF_DECLARE(void) mpf_activity_detector_complete_timeout_set(mpf_activity_detector_t *detector, apr_size_t complete_timeout);
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/** Process current frame, return detected event if any */
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MPF_DECLARE(mpf_detector_event_e) mpf_activity_detector_process(mpf_activity_detector_t *detector, const mpf_frame_t *frame);
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APT_END_EXTERN_C
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#endif /*__MPF_ACTIVITY_DETECTOR_H__*/
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