mirror of
https://github.com/bluekitchen/btstack.git
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75 lines
2.8 KiB
C
75 lines
2.8 KiB
C
/*
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* Copyright (C) 2016 BlueKitchen GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* 4. Any redistribution, use, or modification is done solely for
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* personal benefit and not for any commercial purpose or for
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* monetary gain.
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*
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* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
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* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Please inquire about commercial licensing options at
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* contact@bluekitchen-gmbh.com
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*
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*/
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/*
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* btstack_cvsd_plc.h
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*
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*/
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#ifndef __BTSTACK_CVSD_PLC_H
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#define __BTSTACK_CVSD_PLC_H
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#include <stdint.h>
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#if defined __cplusplus
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extern "C" {
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#endif
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#define CVSD_FS 24 /* CVSD Frame Size */
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#define CVSD_N 128 /* 16ms - Window Length for pattern matching */
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#define CVSD_M 10 /* Template for matching */
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#define CVSD_LHIST (CVSD_N+CVSD_FS-1) /* Length of history buffer required */
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#define CVSD_RT 5 /* Reconvergence Time (samples) */
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#define CVSD_OLAL 16 /* OverLap-Add Length (samples) */
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/* PLC State Information */
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typedef struct cvsd_plc_state {
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int8_t hist[CVSD_LHIST+CVSD_FS+CVSD_RT+CVSD_OLAL];
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int16_t bestlag;
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int nbf;
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} btstack_cvsd_plc_state_t;
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void btstack_cvsd_plc_init(btstack_cvsd_plc_state_t *plc_state);
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void btstack_cvsd_plc_bad_frame(btstack_cvsd_plc_state_t *plc_state, int8_t *out);
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void btstack_cvsd_plc_good_frame(btstack_cvsd_plc_state_t *plc_state, int8_t *in, int8_t *out);
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uint8_t * btstack_cvsd_plc_zero_signal_frame(void);
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#if defined __cplusplus
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}
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#endif
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#endif // __BTSTACK_CVSD_PLC_H
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