ref: 105d751c940c3c6741b5796ba440400b85525b81
dir: /silk/SKP_Silk_structs.h/
/***********************************************************************
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#ifndef SKP_SILK_STRUCTS_H
#define SKP_SILK_STRUCTS_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "SKP_Silk_typedef.h"
#include "SKP_Silk_SigProc_FIX.h"
#include "SKP_Silk_define.h"
#include "entenc.h"
#include "entdec.h"
#ifdef __cplusplus
extern "C"
{
#endif
/************************************/
/* Noise shaping quantization state */
/************************************/
typedef struct {
SKP_int16 xq[ 2 * MAX_FRAME_LENGTH ]; /* Buffer for quantized output signal */
SKP_int32 sLTP_shp_Q10[ 2 * MAX_FRAME_LENGTH ];
SKP_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + NSQ_LPC_BUF_LENGTH ];
SKP_int32 sAR2_Q14[ MAX_SHAPE_LPC_ORDER ];
SKP_int32 sLF_AR_shp_Q12;
SKP_int lagPrev;
SKP_int sLTP_buf_idx;
SKP_int sLTP_shp_buf_idx;
SKP_int32 rand_seed;
SKP_int32 prev_inv_gain_Q16;
SKP_int rewhite_flag;
} SKP_Silk_nsq_state;
/********************************/
/* VAD state */
/********************************/
typedef struct {
SKP_int32 AnaState[ 2 ]; /* Analysis filterbank state: 0-8 kHz */
SKP_int32 AnaState1[ 2 ]; /* Analysis filterbank state: 0-4 kHz */
SKP_int32 AnaState2[ 2 ]; /* Analysis filterbank state: 0-2 kHz */
SKP_int32 XnrgSubfr[ VAD_N_BANDS ]; /* Subframe energies */
SKP_int32 NrgRatioSmth_Q8[ VAD_N_BANDS ]; /* Smoothed energy level in each band */
SKP_int16 HPstate; /* State of differentiator in the lowest band */
SKP_int32 NL[ VAD_N_BANDS ]; /* Noise energy level in each band */
SKP_int32 inv_NL[ VAD_N_BANDS ]; /* Inverse noise energy level in each band */
SKP_int32 NoiseLevelBias[ VAD_N_BANDS ]; /* Noise level estimator bias/offset */
SKP_int32 counter; /* Frame counter used in the initial phase */
} SKP_Silk_VAD_state;
/* Variable cut-off low-pass filter state */
typedef struct {
SKP_int32 In_LP_State[ 2 ]; /* Low pass filter state */
SKP_int32 transition_frame_no; /* Counter which is mapped to a cut-off frequency */
SKP_int mode; /* Operating mode, <0: switch down, >0: switch up; 0: do nothing */
} SKP_Silk_LP_state;
/* Structure containing NLSF codebook */
typedef struct {
const SKP_int16 nVectors;
const SKP_int16 order;
const SKP_int16 quantStepSize_Q16;
const SKP_int16 invQuantStepSize_Q6;
const SKP_uint8 *CB1_NLSF_Q8;
const SKP_uint8 *CB1_iCDF;
const SKP_uint8 *pred_Q8;
const SKP_uint8 *ec_sel;
const SKP_uint8 *ec_iCDF;
const SKP_uint8 *ec_Rates_Q5;
const SKP_int16 *deltaMin_Q15;
} SKP_Silk_NLSF_CB_struct;
typedef struct {
SKP_int32 predictor_prev_Q16;
} stereo_state;
typedef struct {
SKP_int8 GainsIndices[ MAX_NB_SUBFR ];
SKP_int8 LTPIndex[ MAX_NB_SUBFR ];
SKP_int8 NLSFIndices[ MAX_LPC_ORDER + 1 ];
SKP_int16 lagIndex;
SKP_int8 contourIndex;
SKP_int8 signalType;
SKP_int8 quantOffsetType;
SKP_int8 NLSFInterpCoef_Q2;
SKP_int8 PERIndex;
SKP_int8 LTP_scaleIndex;
SKP_int8 Seed;
} SideInfoIndices;
/********************************/
/* Encoder state */
/********************************/
typedef struct {
SKP_int32 In_HP_State[ 2 ]; /* High pass filter state */
SKP_int32 variable_HP_smth1_Q15; /* State of first smoother */
SKP_int32 variable_HP_smth2_Q15; /* State of second smoother */
SKP_Silk_LP_state sLP; /* Low pass filter state */
SKP_Silk_VAD_state sVAD; /* Voice activity detector state */
SKP_Silk_nsq_state sNSQ; /* Noise Shape Quantizer State */
SKP_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ];/* Previously quantized NLSF vector */
SKP_int speech_activity_Q8; /* Speech activity */
SKP_int allow_bandwidth_switch; /* Flag indicating that switching of internal bandwidth is allowed */
SKP_int8 LBRRprevLastGainIndex;
SKP_int8 prevSignalType;
SKP_int prevLag;
SKP_int pitch_LPC_win_length;
SKP_int max_pitch_lag; /* Highest possible pitch lag (samples) */
SKP_int32 API_fs_Hz; /* API sampling frequency (Hz) */
SKP_int32 prev_API_fs_Hz; /* Previous API sampling frequency (Hz) */
SKP_int maxInternal_fs_Hz; /* Maximum internal sampling frequency (Hz) */
SKP_int minInternal_fs_Hz; /* Minimum internal sampling frequency (Hz) */
SKP_int desiredInternal_fs_Hz; /* Soft request for internal sampling frequency (Hz) */
SKP_int fs_kHz; /* Internal sampling frequency (kHz) */
SKP_int nb_subfr; /* Number of 5 ms subframes in a frame */
SKP_int frame_length; /* Frame length (samples) */
SKP_int subfr_length; /* Subframe length (samples) */
SKP_int ltp_mem_length; /* Length of LTP memory */
SKP_int la_pitch; /* Look-ahead for pitch analysis (samples) */
SKP_int la_shape; /* Look-ahead for noise shape analysis (samples) */
SKP_int shapeWinLength; /* Window length for noise shape analysis (samples) */
SKP_int32 TargetRate_bps; /* Target bitrate (bps) */
SKP_int PacketSize_ms; /* Number of milliseconds to put in each packet */
SKP_int PacketLoss_perc; /* Packet loss rate measured by farend */
SKP_int32 frameCounter;
SKP_int Complexity; /* Complexity setting: 0-> low; 1-> medium; 2->high */
SKP_int nStatesDelayedDecision; /* Number of states in delayed decision quantization */
SKP_int useInterpolatedNLSFs; /* Flag for using NLSF interpolation */
SKP_int shapingLPCOrder; /* Filter order for noise shaping filters */
SKP_int predictLPCOrder; /* Filter order for prediction filters */
SKP_int pitchEstimationComplexity; /* Complexity level for pitch estimator */
SKP_int pitchEstimationLPCOrder; /* Whitening filter order for pitch estimator */
SKP_int32 pitchEstimationThreshold_Q16; /* Threshold for pitch estimator */
SKP_int LTPQuantLowComplexity; /* Flag for low complexity LTP quantization */
SKP_int mu_LTP_Q9; /* Rate-distortion tradeoff in LTP quantization */
SKP_int NLSF_MSVQ_Survivors; /* Number of survivors in NLSF MSVQ */
SKP_int first_frame_after_reset; /* Flag for deactivating NLSF interp. and fluc. reduction after resets */
SKP_int controlled_since_last_payload; /* Flag for ensuring codec_control only runs once per packet */
SKP_int warping_Q16; /* Warping parameter for warped noise shaping */
SKP_int useCBR; /* Flag to enable constant bitrate */
SKP_int prefillFlag; /* Flag to indicate that only buffers are prefilled, no coding */
const SKP_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */
const SKP_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */
const SKP_Silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */
SKP_int input_quality_bands_Q15[ VAD_N_BANDS ];
SKP_int input_tilt_Q15;
SKP_int SNR_dB_Q7; /* Quality setting */
SKP_int8 VAD_flags[ MAX_FRAMES_PER_PACKET ];
SKP_int8 LBRR_flag;
SKP_int LBRR_flags[ MAX_FRAMES_PER_PACKET ];
SideInfoIndices indices;
SKP_int8 pulses[ MAX_FRAME_LENGTH ];
/* Input/output buffering */
SKP_int16 inputBuf[ MAX_FRAME_LENGTH ]; /* buffer containing input signal */
SKP_int inputBufIx;
SKP_int nFramesPerPacket;
SKP_int nFramesAnalyzed; /* Number of frames analyzed in current packet */
/* Parameters For LTP scaling Control */
SKP_int frames_since_onset;
/* Specifically for entropy coding */
SKP_int ec_prevSignalType;
SKP_int16 ec_prevLagIndex;
SKP_Silk_resampler_state_struct resampler_state;
/* DTX */
SKP_int useDTX; /* Flag to enable DTX */
SKP_int inDTX; /* Flag to signal DTX period */
SKP_int noSpeechCounter; /* Counts concecutive nonactive frames, used by DTX */
/* Inband Low Bitrate Redundancy (LBRR) data */
SKP_int useInBandFEC; /* Saves the API setting for query */
SKP_int LBRR_enabled; /* Depends on useInBandFRC, bitrate and packet loss rate */
SKP_int LBRR_GainIncreases; /* Number of shifts to Gains to get LBRR rate Voiced frames */
SideInfoIndices indices_LBRR[ MAX_FRAMES_PER_PACKET ];
SKP_int8 pulses_LBRR[ MAX_FRAMES_PER_PACKET ][ MAX_FRAME_LENGTH ];
} SKP_Silk_encoder_state;
/* Struct for Packet Loss Concealment */
typedef struct {
SKP_int32 pitchL_Q8; /* Pitch lag to use for voiced concealment */
SKP_int16 LTPCoef_Q14[ LTP_ORDER ]; /* LTP coeficients to use for voiced concealment */
SKP_int16 prevLPC_Q12[ MAX_LPC_ORDER ];
SKP_int last_frame_lost; /* Was previous frame lost */
SKP_int32 rand_seed; /* Seed for unvoiced signal generation */
SKP_int16 randScale_Q14; /* Scaling of unvoiced random signal */
SKP_int32 conc_energy;
SKP_int conc_energy_shift;
SKP_int16 prevLTP_scale_Q14;
SKP_int32 prevGain_Q16[ MAX_NB_SUBFR ];
SKP_int fs_kHz;
} SKP_Silk_PLC_struct;
/* Struct for CNG */
typedef struct {
SKP_int32 CNG_exc_buf_Q10[ MAX_FRAME_LENGTH ];
SKP_int16 CNG_smth_NLSF_Q15[ MAX_LPC_ORDER ];
SKP_int32 CNG_synth_state[ MAX_LPC_ORDER ];
SKP_int32 CNG_smth_Gain_Q16;
SKP_int32 rand_seed;
SKP_int fs_kHz;
} SKP_Silk_CNG_struct;
/********************************/
/* Decoder state */
/********************************/
typedef struct {
SKP_int32 prev_inv_gain_Q16;
SKP_int32 sLTP_Q16[ 2 * MAX_FRAME_LENGTH ];
SKP_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + MAX_LPC_ORDER ];
SKP_int32 exc_Q10[ MAX_FRAME_LENGTH ];
SKP_int16 outBuf[ 2 * MAX_FRAME_LENGTH ]; /* Buffer for output signal */
SKP_int lagPrev; /* Previous Lag */
SKP_int8 LastGainIndex; /* Previous gain index */
SKP_int fs_kHz; /* Sampling frequency in kHz */
SKP_int32 prev_API_sampleRate; /* Previous API sample frequency (Hz) */
SKP_int nb_subfr; /* Number of 5 ms subframes in a frame */
SKP_int frame_length; /* Frame length (samples) */
SKP_int subfr_length; /* Subframe length (samples) */
SKP_int ltp_mem_length; /* Length of LTP memory */
SKP_int LPC_order; /* LPC order */
SKP_int16 prevNLSF_Q15[ MAX_LPC_ORDER ]; /* Used to interpolate LSFs */
SKP_int first_frame_after_reset; /* Flag for deactivating NLSF interp. and fluc. reduction after resets */
const SKP_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */
const SKP_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */
/* For buffering payload in case of more frames per packet */
SKP_int nFramesDecoded;
SKP_int nFramesPerPacket;
/* Specifically for entropy coding */
SKP_int ec_prevSignalType;
SKP_int16 ec_prevLagIndex;
SKP_int VAD_flags[ MAX_FRAMES_PER_PACKET ];
SKP_int LBRR_flag;
SKP_int LBRR_flags[ MAX_FRAMES_PER_PACKET ];
SKP_Silk_resampler_state_struct resampler_state;
const SKP_Silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */
/* Quantization indices */
SideInfoIndices indices;
/* CNG state */
SKP_Silk_CNG_struct sCNG;
/* Stuff used for PLC */
SKP_int lossCnt;
SKP_int prevSignalType;
SKP_Silk_PLC_struct sPLC;
} SKP_Silk_decoder_state;
/************************/
/* Decoder control */
/************************/
typedef struct {
/* prediction and coding parameters */
SKP_int pitchL[ MAX_NB_SUBFR ];
SKP_int32 Gains_Q16[ MAX_NB_SUBFR ];
/* holds interpolated and final coefficients, 4-byte aligned */
SKP_DWORD_ALIGN SKP_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
SKP_int LTP_scale_Q14;
} SKP_Silk_decoder_control;
#ifdef __cplusplus
}
#endif
#endif