| /*********************************************************************** |
| 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_MAIN_H |
| #define SILK_MAIN_H |
| |
| #include "SigProc_FIX.h" |
| #include "define.h" |
| #include "structs.h" |
| #include "tables.h" |
| #include "PLC.h" |
| #include "control.h" |
| #include "debug.h" |
| #include "entenc.h" |
| #include "entdec.h" |
| |
| #if defined(OPUS_X86_MAY_HAVE_SSE4_1) |
| #include "x86/main_sse.h" |
| #endif |
| |
| /* Convert Left/Right stereo signal to adaptive Mid/Side representation */ |
| void silk_stereo_LR_to_MS( |
| stereo_enc_state *state, /* I/O State */ |
| opus_int16 x1[], /* I/O Left input signal, becomes mid signal */ |
| opus_int16 x2[], /* I/O Right input signal, becomes side signal */ |
| opus_int8 ix[ 2 ][ 3 ], /* O Quantization indices */ |
| opus_int8 *mid_only_flag, /* O Flag: only mid signal coded */ |
| opus_int32 mid_side_rates_bps[], /* O Bitrates for mid and side signals */ |
| opus_int32 total_rate_bps, /* I Total bitrate */ |
| opus_int prev_speech_act_Q8, /* I Speech activity level in previous frame */ |
| opus_int toMono, /* I Last frame before a stereo->mono transition */ |
| opus_int fs_kHz, /* I Sample rate (kHz) */ |
| opus_int frame_length /* I Number of samples */ |
| ); |
| |
| /* Convert adaptive Mid/Side representation to Left/Right stereo signal */ |
| void silk_stereo_MS_to_LR( |
| stereo_dec_state *state, /* I/O State */ |
| opus_int16 x1[], /* I/O Left input signal, becomes mid signal */ |
| opus_int16 x2[], /* I/O Right input signal, becomes side signal */ |
| const opus_int32 pred_Q13[], /* I Predictors */ |
| opus_int fs_kHz, /* I Samples rate (kHz) */ |
| opus_int frame_length /* I Number of samples */ |
| ); |
| |
| /* Find least-squares prediction gain for one signal based on another and quantize it */ |
| opus_int32 silk_stereo_find_predictor( /* O Returns predictor in Q13 */ |
| opus_int32 *ratio_Q14, /* O Ratio of residual and mid energies */ |
| const opus_int16 x[], /* I Basis signal */ |
| const opus_int16 y[], /* I Target signal */ |
| opus_int32 mid_res_amp_Q0[], /* I/O Smoothed mid, residual norms */ |
| opus_int length, /* I Number of samples */ |
| opus_int smooth_coef_Q16 /* I Smoothing coefficient */ |
| ); |
| |
| /* Quantize mid/side predictors */ |
| void silk_stereo_quant_pred( |
| opus_int32 pred_Q13[], /* I/O Predictors (out: quantized) */ |
| opus_int8 ix[ 2 ][ 3 ] /* O Quantization indices */ |
| ); |
| |
| /* Entropy code the mid/side quantization indices */ |
| void silk_stereo_encode_pred( |
| ec_enc *psRangeEnc, /* I/O Compressor data structure */ |
| opus_int8 ix[ 2 ][ 3 ] /* I Quantization indices */ |
| ); |
| |
| /* Entropy code the mid-only flag */ |
| void silk_stereo_encode_mid_only( |
| ec_enc *psRangeEnc, /* I/O Compressor data structure */ |
| opus_int8 mid_only_flag |
| ); |
| |
| /* Decode mid/side predictors */ |
| void silk_stereo_decode_pred( |
| ec_dec *psRangeDec, /* I/O Compressor data structure */ |
| opus_int32 pred_Q13[] /* O Predictors */ |
| ); |
| |
| /* Decode mid-only flag */ |
| void silk_stereo_decode_mid_only( |
| ec_dec *psRangeDec, /* I/O Compressor data structure */ |
| opus_int *decode_only_mid /* O Flag that only mid channel has been coded */ |
| ); |
| |
| /* Encodes signs of excitation */ |
| void silk_encode_signs( |
| ec_enc *psRangeEnc, /* I/O Compressor data structure */ |
| const opus_int8 pulses[], /* I pulse signal */ |
| opus_int length, /* I length of input */ |
| const opus_int signalType, /* I Signal type */ |
| const opus_int quantOffsetType, /* I Quantization offset type */ |
| const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */ |
| ); |
| |
| /* Decodes signs of excitation */ |
| void silk_decode_signs( |
| ec_dec *psRangeDec, /* I/O Compressor data structure */ |
| opus_int16 pulses[], /* I/O pulse signal */ |
| opus_int length, /* I length of input */ |
| const opus_int signalType, /* I Signal type */ |
| const opus_int quantOffsetType, /* I Quantization offset type */ |
| const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */ |
| ); |
| |
| /* Check encoder control struct */ |
| opus_int check_control_input( |
| silk_EncControlStruct *encControl /* I Control structure */ |
| ); |
| |
| /* Control internal sampling rate */ |
| opus_int silk_control_audio_bandwidth( |
| silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */ |
| silk_EncControlStruct *encControl /* I Control structure */ |
| ); |
| |
| /* Control SNR of redidual quantizer */ |
| opus_int silk_control_SNR( |
| silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */ |
| opus_int32 TargetRate_bps /* I Target max bitrate (bps) */ |
| ); |
| |
| /***************/ |
| /* Shell coder */ |
| /***************/ |
| |
| /* Encode quantization indices of excitation */ |
| void silk_encode_pulses( |
| ec_enc *psRangeEnc, /* I/O compressor data structure */ |
| const opus_int signalType, /* I Signal type */ |
| const opus_int quantOffsetType, /* I quantOffsetType */ |
| opus_int8 pulses[], /* I quantization indices */ |
| const opus_int frame_length /* I Frame length */ |
| ); |
| |
| /* Shell encoder, operates on one shell code frame of 16 pulses */ |
| void silk_shell_encoder( |
| ec_enc *psRangeEnc, /* I/O compressor data structure */ |
| const opus_int *pulses0 /* I data: nonnegative pulse amplitudes */ |
| ); |
| |
| /* Shell decoder, operates on one shell code frame of 16 pulses */ |
| void silk_shell_decoder( |
| opus_int16 *pulses0, /* O data: nonnegative pulse amplitudes */ |
| ec_dec *psRangeDec, /* I/O Compressor data structure */ |
| const opus_int pulses4 /* I number of pulses per pulse-subframe */ |
| ); |
| |
| /* Gain scalar quantization with hysteresis, uniform on log scale */ |
| void silk_gains_quant( |
| opus_int8 ind[ MAX_NB_SUBFR ], /* O gain indices */ |
| opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* I/O gains (quantized out) */ |
| opus_int8 *prev_ind, /* I/O last index in previous frame */ |
| const opus_int conditional, /* I first gain is delta coded if 1 */ |
| const opus_int nb_subfr /* I number of subframes */ |
| ); |
| |
| /* Gains scalar dequantization, uniform on log scale */ |
| void silk_gains_dequant( |
| opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* O quantized gains */ |
| const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */ |
| opus_int8 *prev_ind, /* I/O last index in previous frame */ |
| const opus_int conditional, /* I first gain is delta coded if 1 */ |
| const opus_int nb_subfr /* I number of subframes */ |
| ); |
| |
| /* Compute unique identifier of gain indices vector */ |
| opus_int32 silk_gains_ID( /* O returns unique identifier of gains */ |
| const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */ |
| const opus_int nb_subfr /* I number of subframes */ |
| ); |
| |
| /* Interpolate two vectors */ |
| void silk_interpolate( |
| opus_int16 xi[ MAX_LPC_ORDER ], /* O interpolated vector */ |
| const opus_int16 x0[ MAX_LPC_ORDER ], /* I first vector */ |
| const opus_int16 x1[ MAX_LPC_ORDER ], /* I second vector */ |
| const opus_int ifact_Q2, /* I interp. factor, weight on 2nd vector */ |
| const opus_int d /* I number of parameters */ |
| ); |
| |
| /* LTP tap quantizer */ |
| void silk_quant_LTP_gains( |
| opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O Quantized LTP gains */ |
| opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook Index */ |
| opus_int8 *periodicity_index, /* O Periodicity Index */ |
| opus_int32 *sum_gain_dB_Q7, /* I/O Cumulative max prediction gain */ |
| opus_int *pred_gain_dB_Q7, /* O LTP prediction gain */ |
| const opus_int32 XX_Q17[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Correlation matrix in Q18 */ |
| const opus_int32 xX_Q17[ MAX_NB_SUBFR*LTP_ORDER ], /* I Correlation vector in Q18 */ |
| const opus_int subfr_len, /* I Number of samples per subframe */ |
| const opus_int nb_subfr, /* I Number of subframes */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Entropy constrained matrix-weighted VQ, for a single input data vector */ |
| void silk_VQ_WMat_EC_c( |
| opus_int8 *ind, /* O index of best codebook vector */ |
| opus_int32 *res_nrg_Q15, /* O best residual energy */ |
| opus_int32 *rate_dist_Q8, /* O best total bitrate */ |
| opus_int *gain_Q7, /* O sum of absolute LTP coefficients */ |
| const opus_int32 *XX_Q17, /* I correlation matrix */ |
| const opus_int32 *xX_Q17, /* I correlation vector */ |
| const opus_int8 *cb_Q7, /* I codebook */ |
| const opus_uint8 *cb_gain_Q7, /* I codebook effective gain */ |
| const opus_uint8 *cl_Q5, /* I code length for each codebook vector */ |
| const opus_int subfr_len, /* I number of samples per subframe */ |
| const opus_int32 max_gain_Q7, /* I maximum sum of absolute LTP coefficients */ |
| const opus_int L /* I number of vectors in codebook */ |
| ); |
| |
| #if !defined(OVERRIDE_silk_VQ_WMat_EC) |
| #define silk_VQ_WMat_EC(ind, res_nrg_Q15, rate_dist_Q8, gain_Q7, XX_Q17, xX_Q17, cb_Q7, cb_gain_Q7, cl_Q5, subfr_len, max_gain_Q7, L, arch) \ |
| ((void)(arch),silk_VQ_WMat_EC_c(ind, res_nrg_Q15, rate_dist_Q8, gain_Q7, XX_Q17, xX_Q17, cb_Q7, cb_gain_Q7, cl_Q5, subfr_len, max_gain_Q7, L)) |
| #endif |
| |
| /************************************/ |
| /* Noise shaping quantization (NSQ) */ |
| /************************************/ |
| |
| void silk_NSQ_c( |
| const silk_encoder_state *psEncC, /* I/O Encoder State */ |
| silk_nsq_state *NSQ, /* I/O NSQ state */ |
| SideInfoIndices *psIndices, /* I/O Quantization Indices */ |
| const opus_int16 x16[], /* I Input */ |
| opus_int8 pulses[], /* O Quantized pulse signal */ |
| const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */ |
| const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */ |
| const opus_int16 AR_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */ |
| const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */ |
| const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */ |
| const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */ |
| const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */ |
| const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ |
| const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */ |
| const opus_int LTP_scale_Q14 /* I LTP state scaling */ |
| ); |
| |
| #if !defined(OVERRIDE_silk_NSQ) |
| #define silk_NSQ(psEncC, NSQ, psIndices, x16, pulses, PredCoef_Q12, LTPCoef_Q14, AR_Q13, \ |
| HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, pitchL, Lambda_Q10, LTP_scale_Q14, arch) \ |
| ((void)(arch),silk_NSQ_c(psEncC, NSQ, psIndices, x16, pulses, PredCoef_Q12, LTPCoef_Q14, AR_Q13, \ |
| HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, pitchL, Lambda_Q10, LTP_scale_Q14)) |
| #endif |
| |
| /* Noise shaping using delayed decision */ |
| void silk_NSQ_del_dec_c( |
| const silk_encoder_state *psEncC, /* I/O Encoder State */ |
| silk_nsq_state *NSQ, /* I/O NSQ state */ |
| SideInfoIndices *psIndices, /* I/O Quantization Indices */ |
| const opus_int16 x16[], /* I Input */ |
| opus_int8 pulses[], /* O Quantized pulse signal */ |
| const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */ |
| const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */ |
| const opus_int16 AR_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */ |
| const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */ |
| const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */ |
| const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */ |
| const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */ |
| const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ |
| const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */ |
| const opus_int LTP_scale_Q14 /* I LTP state scaling */ |
| ); |
| |
| #if !defined(OVERRIDE_silk_NSQ_del_dec) |
| #define silk_NSQ_del_dec(psEncC, NSQ, psIndices, x16, pulses, PredCoef_Q12, LTPCoef_Q14, AR_Q13, \ |
| HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, pitchL, Lambda_Q10, LTP_scale_Q14, arch) \ |
| ((void)(arch),silk_NSQ_del_dec_c(psEncC, NSQ, psIndices, x16, pulses, PredCoef_Q12, LTPCoef_Q14, AR_Q13, \ |
| HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, pitchL, Lambda_Q10, LTP_scale_Q14)) |
| #endif |
| |
| /************/ |
| /* Silk VAD */ |
| /************/ |
| /* Initialize the Silk VAD */ |
| opus_int silk_VAD_Init( /* O Return value, 0 if success */ |
| silk_VAD_state *psSilk_VAD /* I/O Pointer to Silk VAD state */ |
| ); |
| |
| /* Get speech activity level in Q8 */ |
| opus_int silk_VAD_GetSA_Q8_c( /* O Return value, 0 if success */ |
| silk_encoder_state *psEncC, /* I/O Encoder state */ |
| const opus_int16 pIn[] /* I PCM input */ |
| ); |
| |
| #if !defined(OVERRIDE_silk_VAD_GetSA_Q8) |
| #define silk_VAD_GetSA_Q8(psEnC, pIn, arch) ((void)(arch),silk_VAD_GetSA_Q8_c(psEnC, pIn)) |
| #endif |
| |
| /* Low-pass filter with variable cutoff frequency based on */ |
| /* piece-wise linear interpolation between elliptic filters */ |
| /* Start by setting transition_frame_no = 1; */ |
| void silk_LP_variable_cutoff( |
| silk_LP_state *psLP, /* I/O LP filter state */ |
| opus_int16 *frame, /* I/O Low-pass filtered output signal */ |
| const opus_int frame_length /* I Frame length */ |
| ); |
| |
| /******************/ |
| /* NLSF Quantizer */ |
| /******************/ |
| /* Limit, stabilize, convert and quantize NLSFs */ |
| void silk_process_NLSFs( |
| silk_encoder_state *psEncC, /* I/O Encoder state */ |
| opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */ |
| opus_int16 pNLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */ |
| const opus_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */ |
| ); |
| |
| opus_int32 silk_NLSF_encode( /* O Returns RD value in Q25 */ |
| opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */ |
| opus_int16 *pNLSF_Q15, /* I/O Quantized NLSF vector [ LPC_ORDER ] */ |
| const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */ |
| const opus_int16 *pW_QW, /* I NLSF weight vector [ LPC_ORDER ] */ |
| const opus_int NLSF_mu_Q20, /* I Rate weight for the RD optimization */ |
| const opus_int nSurvivors, /* I Max survivors after first stage */ |
| const opus_int signalType /* I Signal type: 0/1/2 */ |
| ); |
| |
| /* Compute quantization errors for an LPC_order element input vector for a VQ codebook */ |
| void silk_NLSF_VQ( |
| opus_int32 err_Q26[], /* O Quantization errors [K] */ |
| const opus_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */ |
| const opus_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */ |
| const opus_int16 pWght_Q9[], /* I Codebook weights [K*LPC_order] */ |
| const opus_int K, /* I Number of codebook vectors */ |
| const opus_int LPC_order /* I Number of LPCs */ |
| ); |
| |
| /* Delayed-decision quantizer for NLSF residuals */ |
| opus_int32 silk_NLSF_del_dec_quant( /* O Returns RD value in Q25 */ |
| opus_int8 indices[], /* O Quantization indices [ order ] */ |
| const opus_int16 x_Q10[], /* I Input [ order ] */ |
| const opus_int16 w_Q5[], /* I Weights [ order ] */ |
| const opus_uint8 pred_coef_Q8[], /* I Backward predictor coefs [ order ] */ |
| const opus_int16 ec_ix[], /* I Indices to entropy coding tables [ order ] */ |
| const opus_uint8 ec_rates_Q5[], /* I Rates [] */ |
| const opus_int quant_step_size_Q16, /* I Quantization step size */ |
| const opus_int16 inv_quant_step_size_Q6, /* I Inverse quantization step size */ |
| const opus_int32 mu_Q20, /* I R/D tradeoff */ |
| const opus_int16 order /* I Number of input values */ |
| ); |
| |
| /* Unpack predictor values and indices for entropy coding tables */ |
| void silk_NLSF_unpack( |
| opus_int16 ec_ix[], /* O Indices to entropy tables [ LPC_ORDER ] */ |
| opus_uint8 pred_Q8[], /* O LSF predictor [ LPC_ORDER ] */ |
| const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */ |
| const opus_int CB1_index /* I Index of vector in first LSF codebook */ |
| ); |
| |
| /***********************/ |
| /* NLSF vector decoder */ |
| /***********************/ |
| void silk_NLSF_decode( |
| opus_int16 *pNLSF_Q15, /* O Quantized NLSF vector [ LPC_ORDER ] */ |
| opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */ |
| const silk_NLSF_CB_struct *psNLSF_CB /* I Codebook object */ |
| ); |
| |
| /****************************************************/ |
| /* Decoder Functions */ |
| /****************************************************/ |
| opus_int silk_init_decoder( |
| silk_decoder_state *psDec /* I/O Decoder state pointer */ |
| ); |
| |
| /* Set decoder sampling rate */ |
| opus_int silk_decoder_set_fs( |
| silk_decoder_state *psDec, /* I/O Decoder state pointer */ |
| opus_int fs_kHz, /* I Sampling frequency (kHz) */ |
| opus_int32 fs_API_Hz /* I API Sampling frequency (Hz) */ |
| ); |
| |
| /****************/ |
| /* Decode frame */ |
| /****************/ |
| opus_int silk_decode_frame( |
| silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */ |
| ec_dec *psRangeDec, /* I/O Compressor data structure */ |
| opus_int16 pOut[], /* O Pointer to output speech frame */ |
| opus_int32 *pN, /* O Pointer to size of output frame */ |
| opus_int lostFlag, /* I 0: no loss, 1 loss, 2 decode fec */ |
| opus_int condCoding, /* I The type of conditional coding to use */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Decode indices from bitstream */ |
| void silk_decode_indices( |
| silk_decoder_state *psDec, /* I/O State */ |
| ec_dec *psRangeDec, /* I/O Compressor data structure */ |
| opus_int FrameIndex, /* I Frame number */ |
| opus_int decode_LBRR, /* I Flag indicating LBRR data is being decoded */ |
| opus_int condCoding /* I The type of conditional coding to use */ |
| ); |
| |
| /* Decode parameters from payload */ |
| void silk_decode_parameters( |
| silk_decoder_state *psDec, /* I/O State */ |
| silk_decoder_control *psDecCtrl, /* I/O Decoder control */ |
| opus_int condCoding /* I The type of conditional coding to use */ |
| ); |
| |
| /* Core decoder. Performs inverse NSQ operation LTP + LPC */ |
| void silk_decode_core( |
| silk_decoder_state *psDec, /* I/O Decoder state */ |
| silk_decoder_control *psDecCtrl, /* I Decoder control */ |
| opus_int16 xq[], /* O Decoded speech */ |
| const opus_int16 pulses[ MAX_FRAME_LENGTH ], /* I Pulse signal */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Decode quantization indices of excitation (Shell coding) */ |
| void silk_decode_pulses( |
| ec_dec *psRangeDec, /* I/O Compressor data structure */ |
| opus_int16 pulses[], /* O Excitation signal */ |
| const opus_int signalType, /* I Sigtype */ |
| const opus_int quantOffsetType, /* I quantOffsetType */ |
| const opus_int frame_length /* I Frame length */ |
| ); |
| |
| /******************/ |
| /* CNG */ |
| /******************/ |
| |
| /* Reset CNG */ |
| void silk_CNG_Reset( |
| silk_decoder_state *psDec /* I/O Decoder state */ |
| ); |
| |
| /* Updates CNG estimate, and applies the CNG when packet was lost */ |
| void silk_CNG( |
| silk_decoder_state *psDec, /* I/O Decoder state */ |
| silk_decoder_control *psDecCtrl, /* I/O Decoder control */ |
| opus_int16 frame[], /* I/O Signal */ |
| opus_int length /* I Length of residual */ |
| ); |
| |
| /* Encoding of various parameters */ |
| void silk_encode_indices( |
| silk_encoder_state *psEncC, /* I/O Encoder state */ |
| ec_enc *psRangeEnc, /* I/O Compressor data structure */ |
| opus_int FrameIndex, /* I Frame number */ |
| opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */ |
| opus_int condCoding /* I The type of conditional coding to use */ |
| ); |
| |
| #endif |