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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_H
+#define SILK_STRUCTS_H
+
+#include "typedef.h"
+#include "SigProc_FIX.h"
+#include "define.h"
+#include "entenc.h"
+#include "entdec.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/************************************/
+/* Noise shaping quantization state */
+/************************************/
+typedef struct {
+ opus_int16 xq[ 2 * MAX_FRAME_LENGTH ]; /* Buffer for quantized output signal */
+ opus_int32 sLTP_shp_Q14[ 2 * MAX_FRAME_LENGTH ];
+ opus_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + NSQ_LPC_BUF_LENGTH ];
+ opus_int32 sAR2_Q14[ MAX_SHAPE_LPC_ORDER ];
+ opus_int32 sLF_AR_shp_Q14;
+ opus_int lagPrev;
+ opus_int sLTP_buf_idx;
+ opus_int sLTP_shp_buf_idx;
+ opus_int32 rand_seed;
+ opus_int32 prev_gain_Q16;
+ opus_int rewhite_flag;
+} silk_nsq_state;
+
+/********************************/
+/* VAD state */
+/********************************/
+typedef struct {
+ opus_int32 AnaState[ 2 ]; /* Analysis filterbank state: 0-8 kHz */
+ opus_int32 AnaState1[ 2 ]; /* Analysis filterbank state: 0-4 kHz */
+ opus_int32 AnaState2[ 2 ]; /* Analysis filterbank state: 0-2 kHz */
+ opus_int32 XnrgSubfr[ VAD_N_BANDS ]; /* Subframe energies */
+ opus_int32 NrgRatioSmth_Q8[ VAD_N_BANDS ]; /* Smoothed energy level in each band */
+ opus_int16 HPstate; /* State of differentiator in the lowest band */
+ opus_int32 NL[ VAD_N_BANDS ]; /* Noise energy level in each band */
+ opus_int32 inv_NL[ VAD_N_BANDS ]; /* Inverse noise energy level in each band */
+ opus_int32 NoiseLevelBias[ VAD_N_BANDS ]; /* Noise level estimator bias/offset */
+ opus_int32 counter; /* Frame counter used in the initial phase */
+} silk_VAD_state;
+
+/* Variable cut-off low-pass filter state */
+typedef struct {
+ opus_int32 In_LP_State[ 2 ]; /* Low pass filter state */
+ opus_int32 transition_frame_no; /* Counter which is mapped to a cut-off frequency */
+ opus_int mode; /* Operating mode, <0: switch down, >0: switch up; 0: do nothing */
+} silk_LP_state;
+
+/* Structure containing NLSF codebook */
+typedef struct {
+ const opus_int16 nVectors;
+ const opus_int16 order;
+ const opus_int16 quantStepSize_Q16;
+ const opus_int16 invQuantStepSize_Q6;
+ const opus_uint8 *CB1_NLSF_Q8;
+ const opus_uint8 *CB1_iCDF;
+ const opus_uint8 *pred_Q8;
+ const opus_uint8 *ec_sel;
+ const opus_uint8 *ec_iCDF;
+ const opus_uint8 *ec_Rates_Q5;
+ const opus_int16 *deltaMin_Q15;
+} silk_NLSF_CB_struct;
+
+typedef struct {
+ opus_int16 pred_prev_Q13[ 2 ];
+ opus_int16 sMid[ 2 ];
+ opus_int16 sSide[ 2 ];
+ opus_int32 mid_side_amp_Q0[ 4 ];
+ opus_int16 smth_width_Q14;
+ opus_int16 width_prev_Q14;
+ opus_int16 silent_side_len;
+ opus_int8 predIx[ MAX_FRAMES_PER_PACKET ][ 2 ][ 3 ];
+ opus_int8 mid_only_flags[ MAX_FRAMES_PER_PACKET ];
+} stereo_enc_state;
+
+typedef struct {
+ opus_int16 pred_prev_Q13[ 2 ];
+ opus_int16 sMid[ 2 ];
+ opus_int16 sSide[ 2 ];
+} stereo_dec_state;
+
+typedef struct {
+ opus_int8 GainsIndices[ MAX_NB_SUBFR ];
+ opus_int8 LTPIndex[ MAX_NB_SUBFR ];
+ opus_int8 NLSFIndices[ MAX_LPC_ORDER + 1 ];
+ opus_int16 lagIndex;
+ opus_int8 contourIndex;
+ opus_int8 signalType;
+ opus_int8 quantOffsetType;
+ opus_int8 NLSFInterpCoef_Q2;
+ opus_int8 PERIndex;
+ opus_int8 LTP_scaleIndex;
+ opus_int8 Seed;
+} SideInfoIndices;
+
+/********************************/
+/* Encoder state */
+/********************************/
+typedef struct {
+ opus_int32 In_HP_State[ 2 ]; /* High pass filter state */
+ opus_int32 variable_HP_smth1_Q15; /* State of first smoother */
+ opus_int32 variable_HP_smth2_Q15; /* State of second smoother */
+ silk_LP_state sLP; /* Low pass filter state */
+ silk_VAD_state sVAD; /* Voice activity detector state */
+ silk_nsq_state sNSQ; /* Noise Shape Quantizer State */
+ opus_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ]; /* Previously quantized NLSF vector */
+ opus_int speech_activity_Q8; /* Speech activity */
+ opus_int allow_bandwidth_switch; /* Flag indicating that switching of internal bandwidth is allowed */
+ opus_int8 LBRRprevLastGainIndex;
+ opus_int8 prevSignalType;
+ opus_int prevLag;
+ opus_int pitch_LPC_win_length;
+ opus_int max_pitch_lag; /* Highest possible pitch lag (samples) */
+ opus_int32 API_fs_Hz; /* API sampling frequency (Hz) */
+ opus_int32 prev_API_fs_Hz; /* Previous API sampling frequency (Hz) */
+ opus_int maxInternal_fs_Hz; /* Maximum internal sampling frequency (Hz) */
+ opus_int minInternal_fs_Hz; /* Minimum internal sampling frequency (Hz) */
+ opus_int desiredInternal_fs_Hz; /* Soft request for internal sampling frequency (Hz) */
+ opus_int fs_kHz; /* Internal sampling frequency (kHz) */
+ opus_int nb_subfr; /* Number of 5 ms subframes in a frame */
+ opus_int frame_length; /* Frame length (samples) */
+ opus_int subfr_length; /* Subframe length (samples) */
+ opus_int ltp_mem_length; /* Length of LTP memory */
+ opus_int la_pitch; /* Look-ahead for pitch analysis (samples) */
+ opus_int la_shape; /* Look-ahead for noise shape analysis (samples) */
+ opus_int shapeWinLength; /* Window length for noise shape analysis (samples) */
+ opus_int32 TargetRate_bps; /* Target bitrate (bps) */
+ opus_int PacketSize_ms; /* Number of milliseconds to put in each packet */
+ opus_int PacketLoss_perc; /* Packet loss rate measured by farend */
+ opus_int32 frameCounter;
+ opus_int Complexity; /* Complexity setting */
+ opus_int nStatesDelayedDecision; /* Number of states in delayed decision quantization */
+ opus_int useInterpolatedNLSFs; /* Flag for using NLSF interpolation */
+ opus_int shapingLPCOrder; /* Filter order for noise shaping filters */
+ opus_int predictLPCOrder; /* Filter order for prediction filters */
+ opus_int pitchEstimationComplexity; /* Complexity level for pitch estimator */
+ opus_int pitchEstimationLPCOrder; /* Whitening filter order for pitch estimator */
+ opus_int32 pitchEstimationThreshold_Q16; /* Threshold for pitch estimator */
+ opus_int LTPQuantLowComplexity; /* Flag for low complexity LTP quantization */
+ opus_int mu_LTP_Q9; /* Rate-distortion tradeoff in LTP quantization */
+ opus_int NLSF_MSVQ_Survivors; /* Number of survivors in NLSF MSVQ */
+ opus_int first_frame_after_reset; /* Flag for deactivating NLSF interpolation, pitch prediction */
+ opus_int controlled_since_last_payload; /* Flag for ensuring codec_control only runs once per packet */
+ opus_int warping_Q16; /* Warping parameter for warped noise shaping */
+ opus_int useCBR; /* Flag to enable constant bitrate */
+ opus_int prefillFlag; /* Flag to indicate that only buffers are prefilled, no coding */
+ const opus_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */
+ const opus_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */
+ const silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */
+ opus_int input_quality_bands_Q15[ VAD_N_BANDS ];
+ opus_int input_tilt_Q15;
+ opus_int SNR_dB_Q7; /* Quality setting */
+
+ opus_int8 VAD_flags[ MAX_FRAMES_PER_PACKET ];
+ opus_int8 LBRR_flag;
+ opus_int LBRR_flags[ MAX_FRAMES_PER_PACKET ];
+
+ SideInfoIndices indices;
+ opus_int8 pulses[ MAX_FRAME_LENGTH ];
+
+ /* Input/output buffering */
+ opus_int16 inputBuf[ MAX_FRAME_LENGTH + 2 ]; /* Buffer containing input signal */
+ opus_int inputBufIx;
+ opus_int nFramesPerPacket;
+ opus_int nFramesEncoded; /* Number of frames analyzed in current packet */
+
+ opus_int nChannelsAPI;
+ opus_int nChannelsInternal;
+ opus_int channelNb;
+
+ /* Parameters For LTP scaling Control */
+ opus_int frames_since_onset;
+
+ /* Specifically for entropy coding */
+ opus_int ec_prevSignalType;
+ opus_int16 ec_prevLagIndex;
+
+ silk_resampler_state_struct resampler_state;
+
+ /* DTX */
+ opus_int useDTX; /* Flag to enable DTX */
+ opus_int inDTX; /* Flag to signal DTX period */
+ opus_int noSpeechCounter; /* Counts concecutive nonactive frames, used by DTX */
+
+ /* Inband Low Bitrate Redundancy (LBRR) data */
+ opus_int useInBandFEC; /* Saves the API setting for query */
+ opus_int LBRR_enabled; /* Depends on useInBandFRC, bitrate and packet loss rate */
+ opus_int LBRR_GainIncreases; /* Gains increment for coding LBRR frames */
+ SideInfoIndices indices_LBRR[ MAX_FRAMES_PER_PACKET ];
+ opus_int8 pulses_LBRR[ MAX_FRAMES_PER_PACKET ][ MAX_FRAME_LENGTH ];
+} silk_encoder_state;
+
+
+/* Struct for Packet Loss Concealment */
+typedef struct {
+ opus_int32 pitchL_Q8; /* Pitch lag to use for voiced concealment */
+ opus_int16 LTPCoef_Q14[ LTP_ORDER ]; /* LTP coeficients to use for voiced concealment */
+ opus_int16 prevLPC_Q12[ MAX_LPC_ORDER ];
+ opus_int last_frame_lost; /* Was previous frame lost */
+ opus_int32 rand_seed; /* Seed for unvoiced signal generation */
+ opus_int16 randScale_Q14; /* Scaling of unvoiced random signal */
+ opus_int32 conc_energy;
+ opus_int conc_energy_shift;
+ opus_int16 prevLTP_scale_Q14;
+ opus_int32 prevGain_Q16[ 2 ];
+ opus_int fs_kHz;
+ opus_int nb_subfr;
+ opus_int subfr_length;
+} silk_PLC_struct;
+
+/* Struct for CNG */
+typedef struct {
+ opus_int32 CNG_exc_buf_Q14[ MAX_FRAME_LENGTH ];
+ opus_int16 CNG_smth_NLSF_Q15[ MAX_LPC_ORDER ];
+ opus_int32 CNG_synth_state[ MAX_LPC_ORDER ];
+ opus_int32 CNG_smth_Gain_Q16;
+ opus_int32 rand_seed;
+ opus_int fs_kHz;
+} silk_CNG_struct;
+
+/********************************/
+/* Decoder state */
+/********************************/
+typedef struct {
+ opus_int32 prev_gain_Q16;
+ opus_int32 exc_Q14[ MAX_FRAME_LENGTH ];
+ opus_int32 sLPC_Q14_buf[ MAX_LPC_ORDER ];
+ opus_int16 outBuf[ MAX_FRAME_LENGTH + 2 * MAX_SUB_FRAME_LENGTH ]; /* Buffer for output signal */
+ opus_int lagPrev; /* Previous Lag */
+ opus_int8 LastGainIndex; /* Previous gain index */
+ opus_int fs_kHz; /* Sampling frequency in kHz */
+ opus_int32 fs_API_hz; /* API sample frequency (Hz) */
+ opus_int nb_subfr; /* Number of 5 ms subframes in a frame */
+ opus_int frame_length; /* Frame length (samples) */
+ opus_int subfr_length; /* Subframe length (samples) */
+ opus_int ltp_mem_length; /* Length of LTP memory */
+ opus_int LPC_order; /* LPC order */
+ opus_int16 prevNLSF_Q15[ MAX_LPC_ORDER ]; /* Used to interpolate LSFs */
+ opus_int first_frame_after_reset; /* Flag for deactivating NLSF interpolation */
+ const opus_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */
+ const opus_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */
+
+ /* For buffering payload in case of more frames per packet */
+ opus_int nFramesDecoded;
+ opus_int nFramesPerPacket;
+
+ /* Specifically for entropy coding */
+ opus_int ec_prevSignalType;
+ opus_int16 ec_prevLagIndex;
+
+ opus_int VAD_flags[ MAX_FRAMES_PER_PACKET ];
+ opus_int LBRR_flag;
+ opus_int LBRR_flags[ MAX_FRAMES_PER_PACKET ];
+
+ silk_resampler_state_struct resampler_state;
+
+ const silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */
+
+ /* Quantization indices */
+ SideInfoIndices indices;
+
+ /* CNG state */
+ silk_CNG_struct sCNG;
+
+ /* Stuff used for PLC */
+ opus_int lossCnt;
+ opus_int prevSignalType;
+
+ silk_PLC_struct sPLC;
+
+} silk_decoder_state;
+
+/************************/
+/* Decoder control */
+/************************/
+typedef struct {
+ /* Prediction and coding parameters */
+ opus_int pitchL[ MAX_NB_SUBFR ];
+ opus_int32 Gains_Q16[ MAX_NB_SUBFR ];
+ /* Holds interpolated and final coefficients, 4-byte aligned */
+ silk_DWORD_ALIGN opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
+ opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
+ opus_int LTP_scale_Q14;
+} silk_decoder_control;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
generated by cgit (git 2.34.1) at 2024-11-15 13:01:35 +0000