shithub: opus

ref: 0dbd0ca3e63064cf5108d716f96e4bbbe21c160d
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
modification, (subject to the limitations in the disclaimer below)
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
contributors, may be used to endorse or promote products derived from
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
CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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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 */

    /* Parameters for CBR mode */
    opus_int32                  GainsUnq_Q16[ MAX_NB_SUBFR ];
    opus_int8                   lastGainIndexPrev;
} 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                    nPrevChannelsInternal;
    opus_int                    timeSinceSwitchAllowed_ms;
    opus_int                    allowBandwidthSwitch;
    opus_int                    prev_decode_only_middle;
} silk_encoder;

#ifdef __cplusplus
}
#endif

#endif