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/***********************************************************************
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, 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 Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***********************************************************************/
#ifndef SILK_STRUCTS_FLP_H
#define SILK_STRUCTS_FLP_H
#include "typedef.h"
#include "silk_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 */
} 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
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