1*7e6b1e83SMilanka Ringwald /* 2*7e6b1e83SMilanka Ringwald * Copyright (C) 2016 BlueKitchen GmbH 3*7e6b1e83SMilanka Ringwald * 4*7e6b1e83SMilanka Ringwald * Redistribution and use in source and binary forms, with or without 5*7e6b1e83SMilanka Ringwald * modification, are permitted provided that the following conditions 6*7e6b1e83SMilanka Ringwald * are met: 7*7e6b1e83SMilanka Ringwald * 8*7e6b1e83SMilanka Ringwald * 1. Redistributions of source code must retain the above copyright 9*7e6b1e83SMilanka Ringwald * notice, this list of conditions and the following disclaimer. 10*7e6b1e83SMilanka Ringwald * 2. Redistributions in binary form must reproduce the above copyright 11*7e6b1e83SMilanka Ringwald * notice, this list of conditions and the following disclaimer in the 12*7e6b1e83SMilanka Ringwald * documentation and/or other materials provided with the distribution. 13*7e6b1e83SMilanka Ringwald * 3. Neither the name of the copyright holders nor the names of 14*7e6b1e83SMilanka Ringwald * contributors may be used to endorse or promote products derived 15*7e6b1e83SMilanka Ringwald * from this software without specific prior written permission. 16*7e6b1e83SMilanka Ringwald * 4. Any redistribution, use, or modification is done solely for 17*7e6b1e83SMilanka Ringwald * personal benefit and not for any commercial purpose or for 18*7e6b1e83SMilanka Ringwald * monetary gain. 19*7e6b1e83SMilanka Ringwald * 20*7e6b1e83SMilanka Ringwald * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21*7e6b1e83SMilanka Ringwald * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22*7e6b1e83SMilanka Ringwald * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23*7e6b1e83SMilanka Ringwald * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24*7e6b1e83SMilanka Ringwald * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25*7e6b1e83SMilanka Ringwald * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26*7e6b1e83SMilanka Ringwald * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27*7e6b1e83SMilanka Ringwald * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28*7e6b1e83SMilanka Ringwald * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29*7e6b1e83SMilanka Ringwald * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30*7e6b1e83SMilanka Ringwald * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31*7e6b1e83SMilanka Ringwald * SUCH DAMAGE. 32*7e6b1e83SMilanka Ringwald * 33*7e6b1e83SMilanka Ringwald * Please inquire about commercial licensing options at 34*7e6b1e83SMilanka Ringwald * [email protected] 35*7e6b1e83SMilanka Ringwald * 36*7e6b1e83SMilanka Ringwald */ 37*7e6b1e83SMilanka Ringwald 38*7e6b1e83SMilanka Ringwald /* 39*7e6b1e83SMilanka Ringwald * btstack_cvsd_plc.h 40*7e6b1e83SMilanka Ringwald * 41*7e6b1e83SMilanka Ringwald */ 42*7e6b1e83SMilanka Ringwald 43*7e6b1e83SMilanka Ringwald #ifndef __BTSTACK_CVSD_PLC_H 44*7e6b1e83SMilanka Ringwald #define __BTSTACK_CVSD_PLC_H 45*7e6b1e83SMilanka Ringwald 46*7e6b1e83SMilanka Ringwald #include <stdint.h> 47*7e6b1e83SMilanka Ringwald 48*7e6b1e83SMilanka Ringwald #if defined __cplusplus 49*7e6b1e83SMilanka Ringwald extern "C" { 50*7e6b1e83SMilanka Ringwald #endif 51*7e6b1e83SMilanka Ringwald 52*7e6b1e83SMilanka Ringwald #define CVSD_FS 24 /* CVSD Frame Size */ 53*7e6b1e83SMilanka Ringwald #define CVSD_N 128 /* 16ms - Window Length for pattern matching */ 54*7e6b1e83SMilanka Ringwald #define CVSD_M 10 /* Template for matching */ 55*7e6b1e83SMilanka Ringwald #define CVSD_LHIST (CVSD_N+CVSD_FS-1) /* Length of history buffer required */ 56*7e6b1e83SMilanka Ringwald #define CVSD_RT 5 /* Reconvergence Time (samples) */ 57*7e6b1e83SMilanka Ringwald #define CVSD_OLAL 16 /* OverLap-Add Length (samples) */ 58*7e6b1e83SMilanka Ringwald 59*7e6b1e83SMilanka Ringwald /* PLC State Information */ 60*7e6b1e83SMilanka Ringwald typedef struct cvsd_plc_state { 61*7e6b1e83SMilanka Ringwald int8_t hist[CVSD_LHIST+CVSD_FS+CVSD_RT+CVSD_OLAL]; 62*7e6b1e83SMilanka Ringwald int16_t bestlag; 63*7e6b1e83SMilanka Ringwald int nbf; 64*7e6b1e83SMilanka Ringwald } btstack_cvsd_plc_state_t; 65*7e6b1e83SMilanka Ringwald 66*7e6b1e83SMilanka Ringwald void btstack_cvsd_plc_init(btstack_cvsd_plc_state_t *plc_state); 67*7e6b1e83SMilanka Ringwald void btstack_cvsd_plc_bad_frame(btstack_cvsd_plc_state_t *plc_state, int8_t *out); 68*7e6b1e83SMilanka Ringwald void btstack_cvsd_plc_good_frame(btstack_cvsd_plc_state_t *plc_state, int8_t *in, int8_t *out); 69*7e6b1e83SMilanka Ringwald uint8_t * btstack_cvsd_plc_zero_signal_frame(void); 70*7e6b1e83SMilanka Ringwald 71*7e6b1e83SMilanka Ringwald #if defined __cplusplus 72*7e6b1e83SMilanka Ringwald } 73*7e6b1e83SMilanka Ringwald #endif 74*7e6b1e83SMilanka Ringwald 75*7e6b1e83SMilanka Ringwald #endif // __BTSTACK_CVSD_PLC_H