192 lines
9.1 KiB
C
192 lines
9.1 KiB
C
#pragma once
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#include "Arduino.h"
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#include "silk_defines.h"
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typedef struct {
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int8_t GainsIndices[MAX_NB_SUBFR];
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int8_t LTPIndex[MAX_NB_SUBFR];
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int8_t NLSFIndices[MAX_LPC_ORDER + 1];
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int16_t lagIndex;
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int8_t contourIndex;
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int8_t signalType;
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int8_t quantOffsetType;
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int8_t NLSFInterpCoef_Q2;
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int8_t PERIndex;
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int8_t LTP_scaleIndex;
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int8_t Seed;
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} sideInfoIndices_t;
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typedef struct {
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int32_t AnaState[2]; /* Analysis filterbank state: 0-8 kHz */
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int32_t AnaState1[2]; /* Analysis filterbank state: 0-4 kHz */
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int32_t AnaState2[2]; /* Analysis filterbank state: 0-2 kHz */
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int32_t XnrgSubfr[VAD_N_BANDS]; /* Subframe energies */
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int32_t NrgRatioSmth_Q8[VAD_N_BANDS]; /* Smoothed energy level in each band */
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int16_t HPstate; /* State of differentiator in the lowest band */
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int32_t NL[VAD_N_BANDS]; /* Noise energy level in each band */
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int32_t inv_NL[VAD_N_BANDS]; /* Inverse noise energy level in each band */
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int32_t NoiseLevelBias[VAD_N_BANDS]; /* Noise level estimator bias/offset */
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int32_t counter; /* Frame counter used in the initial phase */
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} silk_VAD_state_t;
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typedef struct { /* Variable cut-off low-pass filter state */
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int32_t In_LP_State[2]; /* Low pass filter state */
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int32_t transition_frame_no; /* Counter which is mapped to a cut-off frequency */
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int32_t mode; /* Operating mode, <0: switch down, >0: switch up; 0: do nothing */
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int32_t saved_fs_kHz; /* If non-zero, holds the last sampling rate before a bandwidth switching reset. */
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} silk_LP_state_t;
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typedef struct { /* Structure containing NLSF codebook */
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const int16_t nVectors;
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const int16_t order;
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const int16_t quantStepSize_Q16;
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const int16_t invQuantStepSize_Q6;
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const uint8_t* CB1_NLSF_Q8;
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const int16_t* CB1_Wght_Q9;
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const uint8_t* CB1_iCDF;
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const uint8_t* pred_Q8;
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const uint8_t* ec_sel;
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const uint8_t* ec_iCDF;
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const uint8_t* ec_Rates_Q5;
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const int16_t* deltaMin_Q15;
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} silk_NLSF_CB_struct_t;
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typedef struct _silk_resampler_state_struct {
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int32_t sIIR[SILK_RESAMPLER_MAX_IIR_ORDER]; /* this must be the first element of this struct */
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union {
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int32_t i32[SILK_RESAMPLER_MAX_FIR_ORDER];
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int16_t i16[SILK_RESAMPLER_MAX_FIR_ORDER];
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} sFIR;
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int16_t delayBuf[48];
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int32_t resampler_function;
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int32_t batchSize;
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int32_t invRatio_Q16;
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int32_t FIR_Order;
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int32_t FIR_Fracs;
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int32_t Fs_in_kHz;
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int32_t Fs_out_kHz;
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int32_t inputDelay;
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const int16_t* Coefs;
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} silk_resampler_state_struct_t;
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typedef struct {
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int16_t pred_prev_Q13[2];
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int16_t sMid[2];
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int16_t sSide[2];
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} stereo_dec_state_t;
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/* Struct for Packet Loss Concealment */
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typedef struct {
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int32_t pitchL_Q8; /* Pitch lag to use for voiced concealment */
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int16_t LTPCoef_Q14[LTP_ORDER]; /* LTP coeficients to use for voiced concealment */
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int16_t prevLPC_Q12[MAX_LPC_ORDER];
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int32_t last_frame_lost; /* Was previous frame lost */
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int32_t rand_seed; /* Seed for unvoiced signal generation */
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int16_t randScale_Q14; /* Scaling of unvoiced random signal */
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int32_t conc_energy;
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int32_t conc_energy_shift;
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int16_t prevLTP_scale_Q14;
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int32_t prevGain_Q16[2];
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int32_t fs_kHz;
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int32_t nb_subfr;
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int32_t subfr_length;
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} silk_PLC_struct_t;
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/* Struct for CNG */
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typedef struct {
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int32_t CNG_exc_buf_Q14[MAX_FRAME_LENGTH];
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int16_t CNG_smth_NLSF_Q15[MAX_LPC_ORDER];
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int32_t CNG_synth_state[MAX_LPC_ORDER];
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int32_t CNG_smth_Gain_Q16;
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int32_t rand_seed;
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int32_t fs_kHz;
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} silk_CNG_struct_t;
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typedef struct {
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int32_t prev_gain_Q16;
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int32_t exc_Q14[MAX_FRAME_LENGTH];
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int32_t sLPC_Q14_buf[MAX_LPC_ORDER];
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int16_t outBuf[MAX_FRAME_LENGTH + 2 * MAX_SUB_FRAME_LENGTH]; /* Buffer for output signal */
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int32_t lagPrev; /* Previous Lag */
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int8_t LastGainIndex; /* Previous gain index */
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int32_t fs_kHz; /* Sampling frequency in kHz */
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int32_t fs_API_hz; /* API sample frequency (Hz) */
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int32_t nb_subfr; /* Number of 5 ms subframes in a frame */
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int32_t frame_length; /* Frame length (samples) */
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int32_t subfr_length; /* Subframe length (samples) */
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int32_t ltp_mem_length; /* Length of LTP memory */
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int32_t LPC_order; /* LPC order */
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int16_t prevNLSF_Q15[MAX_LPC_ORDER]; /* Used to interpolate LSFs */
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int32_t first_frame_after_reset; /* Flag for deactivating NLSF interpolation */
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const uint8_t* pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */
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const uint8_t* pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */
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/* For buffering payload in case of more frames per packet */
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int32_t nFramesDecoded;
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int32_t nFramesPerPacket;
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/* Specifically for entropy coding */
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int32_t ec_prevSignalType;
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int16_t ec_prevLagIndex;
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int32_t VAD_flags[MAX_FRAMES_PER_PACKET];
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int32_t LBRR_flag;
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int32_t LBRR_flags[MAX_FRAMES_PER_PACKET];
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const silk_NLSF_CB_struct_t* psNLSF_CB; /* Pointer to NLSF codebook */
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sideInfoIndices_t indices; /* Quantization indices */
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silk_CNG_struct_t sCNG; /* CNG state */
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int32_t lossCnt; /* Stuff used for PLC */
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int32_t prevSignalType;
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silk_PLC_struct_t sPLC;
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} silk_decoder_state_t;
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typedef struct {
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int32_t pitchL[MAX_NB_SUBFR]; /* Prediction and coding parameters */
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int32_t Gains_Q16[MAX_NB_SUBFR];
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int16_t PredCoef_Q12[2][MAX_LPC_ORDER]; /* Holds interpolated and final coefficients, 4-byte aligned */
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int16_t LTPCoef_Q14[LTP_ORDER * MAX_NB_SUBFR];
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int32_t LTP_scale_Q14;
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} silk_decoder_control_t;
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/* Decoder Super Struct */
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typedef struct {
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stereo_dec_state_t sStereo;
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int32_t nChannelsAPI;
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int32_t nChannelsInternal;
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int32_t prev_decode_only_middle;
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} silk_decoder_t;
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typedef struct {
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int32_t sLPC_Q14[MAX_SUB_FRAME_LENGTH + NSQ_LPC_BUF_LENGTH];
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int32_t RandState[DECISION_DELAY];
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int32_t Q_Q10[DECISION_DELAY];
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int32_t Xq_Q14[DECISION_DELAY];
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int32_t Pred_Q15[DECISION_DELAY];
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int32_t Shape_Q14[DECISION_DELAY];
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int32_t sAR2_Q14[MAX_SHAPE_LPC_ORDER];
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int32_t LF_AR_Q14;
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int32_t Diff_Q14;
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int32_t Seed;
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int32_t SeedInit;
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int32_t RD_Q10;
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} NSQ_del_dec_struct;
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typedef struct {
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int32_t Q_Q10;
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int32_t RD_Q10;
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int32_t xq_Q14;
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int32_t LF_AR_Q14;
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int32_t Diff_Q14;
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int32_t sLTP_shp_Q14;
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int32_t LPC_exc_Q14;
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} NSQ_sample_struct;
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typedef NSQ_sample_struct NSQ_sample_pair[2];
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typedef struct {
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int32_t nChannelsAPI; /* I: Number of channels; 1/2 */
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int32_t nChannelsInternal; /* I: Number of channels; 1/2 */
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int32_t API_sampleRate; /* I: Output signal sampling rate in Hertz; 8000/12000/16000/24000/32000/44100/48000 */
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int32_t internalSampleRate; /* I: Internal sampling rate used, in Hertz; 8000/12000/16000 */
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int32_t payloadSize_ms; /* I: Number of samples per packet in milliseconds; 10/20/40/60 */
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int32_t prevPitchLag; /* O: Pitch lag of previous frame (0 if unvoiced), measured in samples at 48 kHz */
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} silk_DecControlStruct_t;
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