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88 lines
3.2 KiB
C
88 lines
3.2 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_sbc_plc.h
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*
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*/
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#ifndef BTSTACK_SBC_PLC_H
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#define BTSTACK_SBC_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 SBC_FS 120 /* SBC Frame Size */
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#define SBC_N 512 /* 32ms - Window Length for pattern matching */
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#define SBC_M 64 /* 4ms - Template for matching */
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#define SBC_LHIST (SBC_N+SBC_FS-1) /* Length of history buffer required */
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#define SBC_RT 36 /* SBC Reconvergence Time (samples) */
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#define SBC_OLAL 16 /* OverLap-Add Length (samples) */
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/* PLC State Information */
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typedef struct sbc_plc_state {
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int16_t hist[SBC_LHIST+SBC_FS+SBC_RT+SBC_OLAL];
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int16_t bestlag;
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int nbf;
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// summary of processed good and bad frames
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int good_frames_nr;
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int bad_frames_nr;
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int frame_count;
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int max_consecutive_bad_frames_nr;
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} btstack_sbc_plc_state_t;
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// All int16 audio samples are in host endiness
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void btstack_sbc_plc_init(btstack_sbc_plc_state_t *plc_state);
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void btstack_sbc_plc_bad_frame(btstack_sbc_plc_state_t *plc_state, int16_t *ZIRbuf, int16_t *out);
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void btstack_sbc_plc_good_frame(btstack_sbc_plc_state_t *plc_state, int16_t *in, int16_t *out);
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uint8_t * btstack_sbc_plc_zero_signal_frame(void);
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void btstack_sbc_dump_statistics(btstack_sbc_plc_state_t * state);
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#ifdef OCTAVE_OUTPUT
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void btstack_sbc_plc_octave_set_base_name(const char * name);
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#endif
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#if defined __cplusplus
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}
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#endif
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#endif // BTSTACK_SBC_PLC_H
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