opus/silk/PLC.h

/***********************************************************************
Copyright (c) 2006-2012 IETF Trust and Skype Limited. All rights reserved.

This file is extracted from RFC6716. Please see that RFC for additional
information.

Redistribution and use in source and binary forms, with or without
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS”
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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***********************************************************************/

#ifndef SILK_PLC_H
#define SILK_PLC_H

#include "main.h"

#define BWE_COEF                        0.99
#define V_PITCH_GAIN_START_MIN_Q14      11469               /* 0.7 in Q14               */
#define V_PITCH_GAIN_START_MAX_Q14      15565               /* 0.95 in Q14              */
#define MAX_PITCH_LAG_MS                18
#define SA_THRES_Q8                     50
#define RAND_BUF_SIZE                   128
#define RAND_BUF_MASK                   ( RAND_BUF_SIZE - 1 )
#define LOG2_INV_LPC_GAIN_HIGH_THRES    3                   /* 2^3 = 8 dB LPC gain      */
#define LOG2_INV_LPC_GAIN_LOW_THRES     8                   /* 2^8 = 24 dB LPC gain     */
#define PITCH_DRIFT_FAC_Q16             655                 /* 0.01 in Q16              */

void silk_PLC_Reset(
    silk_decoder_state                  *psDec              /* I/O Decoder state        */
);

void silk_PLC(
    silk_decoder_state                  *psDec,             /* I/O Decoder state        */
    silk_decoder_control                *psDecCtrl,         /* I/O Decoder control      */
    opus_int16                          frame[],            /* I/O  signal              */
    opus_int                            lost                /* I Loss flag              */
);

void silk_PLC_glue_frames(
    silk_decoder_state                  *psDec,             /* I/O decoder state        */
    opus_int16                          frame[],            /* I/O signal               */
    opus_int                            length              /* I length of signal       */
);

#endif