shithub: opus

ref: 828e33f304e99321a7990752aeb97616399bfbcc
dir: /silk/float/structs_FLP.h/

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/***********************************************************************
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Redistribution and use in source and binary forms, with or without
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are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of Skype Limited, nor the names of specific
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this software without specific prior written permission.
NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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***********************************************************************/

#ifndef SILK_STRUCTS_FLP_H
#define SILK_STRUCTS_FLP_H

#include "typedef.h"
#include "main.h"
#include "structs.h"

#ifdef __cplusplus
extern "C"
{
#endif

/********************************/
/* Noise shaping analysis state */
/********************************/
typedef struct {
    opus_int8    LastGainIndex;
    silk_float   HarmBoost_smth;
    silk_float   HarmShapeGain_smth;
    silk_float   Tilt_smth;
} silk_shape_state_FLP;

/********************************/
/* Prefilter state              */
/********************************/
typedef struct {
    silk_float   sLTP_shp[ LTP_BUF_LENGTH ];
    silk_float   sAR_shp[ MAX_SHAPE_LPC_ORDER + 1 ];
    opus_int     sLTP_shp_buf_idx;
    silk_float   sLF_AR_shp;
    silk_float   sLF_MA_shp;
    silk_float   sHarmHP;
    opus_int32   rand_seed;
    opus_int     lagPrev;
} silk_prefilter_state_FLP;

/********************************/
/* Encoder state FLP            */
/********************************/
typedef struct {
    silk_encoder_state          sCmn;                       /* Common struct, shared with fixed-point code */
    silk_shape_state_FLP        sShape;                     /* Noise shaping state */
    silk_prefilter_state_FLP    sPrefilt;                   /* Prefilter State */

    /* Buffer for find pitch and noise shape analysis */
    silk_float                   x_buf[ 2 * MAX_FRAME_LENGTH + LA_SHAPE_MAX ];/* Buffer for find pitch and noise shape analysis */
    silk_float                   LTPCorr;                    /* Normalized correlation from pitch lag estimator */

    /* Parameters for LTP scaling control */
    silk_float                   prevLTPredCodGain;
    silk_float                   HPLTPredCodGain;
} silk_encoder_state_FLP;

/************************/
/* Encoder control FLP  */
/************************/
typedef struct {
    /* Prediction and coding parameters */
    silk_float                    Gains[ MAX_NB_SUBFR ];
    silk_float                    PredCoef[ 2 ][ MAX_LPC_ORDER ];        /* holds interpolated and final coefficients */
    silk_float                    LTPCoef[LTP_ORDER * MAX_NB_SUBFR];
    silk_float                    LTP_scale;
    opus_int                     pitchL[ MAX_NB_SUBFR ];

    /* Noise shaping parameters */
    silk_float                    AR1[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
    silk_float                    AR2[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
    silk_float                    LF_MA_shp[     MAX_NB_SUBFR ];
    silk_float                    LF_AR_shp[     MAX_NB_SUBFR ];
    silk_float                    GainsPre[      MAX_NB_SUBFR ];
    silk_float                    HarmBoost[     MAX_NB_SUBFR ];
    silk_float                    Tilt[          MAX_NB_SUBFR ];
    silk_float                    HarmShapeGain[ MAX_NB_SUBFR ];
    silk_float                    Lambda;
    silk_float                    input_quality;
    silk_float                    coding_quality;

    /* Measures */
    silk_float                    sparseness;
    silk_float                   predGain;
    silk_float                    LTPredCodGain;
    silk_float                    ResNrg[ MAX_NB_SUBFR ];                    /* Residual energy per subframe */
} silk_encoder_control_FLP;

/************************/
/* Encoder Super Struct */
/************************/
typedef struct {
    silk_encoder_state_FLP      state_Fxx[ ENCODER_NUM_CHANNELS ];
    stereo_enc_state            sStereo;
    opus_int32                   nBitsExceeded;
    opus_int                     nChannelsAPI;
    opus_int                     nChannelsInternal;
    opus_int                     timeSinceSwitchAllowed_ms;
    opus_int                     allowBandwidthSwitch;
} silk_encoder;

#ifdef __cplusplus
}
#endif

#endif