/*
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* flowcontrol.h - routines to silently discard samples in excess (used by AEC implementation)
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*
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* Copyright (C) 2009-2012 Belledonne Communications, Grenoble, France
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef flowcontrol_h
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#define flowcontrol_h
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typedef struct _MSAudioFlowController {
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uint32_t target_samples;
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uint32_t total_samples;
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uint32_t current_pos;
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uint32_t current_dropped;
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} MSAudioFlowController;
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#ifdef __cplusplus
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extern "C"{
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#endif
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MS2_PUBLIC void ms_audio_flow_controller_init(MSAudioFlowController *ctl);
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MS2_PUBLIC void ms_audio_flow_controller_set_target(MSAudioFlowController *ctl, uint32_t samples_to_drop, uint32_t total_samples);
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MS2_PUBLIC mblk_t *ms_audio_flow_controller_process(MSAudioFlowController *ctl, mblk_t *m);
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/**
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* Structure carried by MS_AUDIO_FLOW_CONTROL_DROP_EVENT
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**/
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typedef struct _MSAudioFlowControlDropEvent{
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uint32_t flow_control_interval_ms;
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uint32_t drop_ms;
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} MSAudioFlowControlDropEvent;
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/**
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* Event sent by the filter each time some samples need to be dropped.
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**/
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#define MS_AUDIO_FLOW_CONTROL_DROP_EVENT MS_FILTER_EVENT(MS_AUDIO_FLOW_CONTROL_ID, 0, MSAudioFlowControlDropEvent)
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#ifdef __cplusplus
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}
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#endif
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#endif
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