| /*********************************************************************** | |
| Copyright (c) 2006-2011, Skype Limited. All rights reserved. | |
| Redistribution and use in source and binary forms, with or without | |
| modification, (subject to the limitations in the disclaimer below) | |
| are permitted provided that the following conditions are met: | |
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| 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 Skype Limited, nor the names of specific | |
| contributors, may be used to endorse or promote products derived from | |
| this software without specific prior written permission. | |
| NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED | |
| BY THIS LICENSE. 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 | |
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| OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| ***********************************************************************/ | |
| #ifndef SKP_SILK_MAIN_FIX_H | |
| #define SKP_SILK_MAIN_FIX_H | |
| #include "SKP_Silk_SigProc_FIX.h" | |
| #include "SKP_Silk_structs_FIX.h" | |
| #include "SKP_Silk_control.h" | |
| #include "SKP_Silk_main.h" | |
| #include "SKP_Silk_PLC.h" | |
| #include "SKP_debug.h" | |
| #include "entenc.h" | |
| #ifndef FORCE_CPP_BUILD | |
| #ifdef __cplusplus | |
| extern "C" | |
| { | |
| #endif | |
| #endif | |
| /*********************/ | |
| /* Encoder Functions */ | |
| /*********************/ | |
| /* Encoder main function */ | |
| SKP_int SKP_Silk_encode_frame_FIX( | |
| SKP_Silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */ | |
| SKP_int32 *pnBytesOut, /* O Pointer to number of payload bytes; */ | |
| ec_enc *psRangeEnc /* I/O compressor data structure */ | |
| ); | |
| /* Low Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode with lower bitrate */ | |
| void SKP_Silk_LBRR_encode_FIX( | |
| SKP_Silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */ | |
| SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O Pointer to Silk FIX encoder control struct */ | |
| const SKP_int16 xfw[] /* I Input signal */ | |
| ); | |
| /* Initializes the Silk encoder state */ | |
| SKP_int SKP_Silk_init_encoder( | |
| SKP_Silk_encoder_state_FIX *psEnc /* I/O Pointer to Silk FIX encoder state */ | |
| ); | |
| /* Control the Silk encoder */ | |
| SKP_int SKP_Silk_control_encoder( | |
| SKP_Silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk encoder state */ | |
| SKP_SILK_SDK_EncControlStruct *encControl, /* I: Control structure */ | |
| const SKP_int32 TargetRate_bps /* I Target max bitrate (bps) */ | |
| ); | |
| /****************/ | |
| /* Prefiltering */ | |
| /****************/ | |
| void SKP_Silk_prefilter_FIX( | |
| SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state */ | |
| const SKP_Silk_encoder_control_FIX *psEncCtrl, /* I Encoder control */ | |
| SKP_int16 xw[], /* O Weighted signal */ | |
| const SKP_int16 x[] /* I Speech signal */ | |
| ); | |
| /**************************/ | |
| /* Noise shaping analysis */ | |
| /**************************/ | |
| /* Compute noise shaping coefficients and initial gain values */ | |
| void SKP_Silk_noise_shape_analysis_FIX( | |
| SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */ | |
| SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control FIX */ | |
| const SKP_int16 *pitch_res, /* I LPC residual from pitch analysis */ | |
| const SKP_int16 *x /* I Input signal [ frame_length + la_shape ] */ | |
| ); | |
| /* Autocorrelations for a warped frequency axis */ | |
| void SKP_Silk_warped_autocorrelation_FIX( | |
| SKP_int32 *corr, /* O Result [order + 1] */ | |
| SKP_int *scale, /* O Scaling of the correlation vector */ | |
| const SKP_int16 *input, /* I Input data to correlate */ | |
| const SKP_int warping_Q16, /* I Warping coefficient */ | |
| const SKP_int length, /* I Length of input */ | |
| const SKP_int order /* I Correlation order (even) */ | |
| ); | |
| /* Calculation of LTP state scaling */ | |
| void SKP_Silk_LTP_scale_ctrl_FIX( | |
| SKP_Silk_encoder_state_FIX *psEnc, /* I/O encoder state */ | |
| SKP_Silk_encoder_control_FIX *psEncCtrl /* I/O encoder control */ | |
| ); | |
| /**********************************************/ | |
| /* Prediction Analysis */ | |
| /**********************************************/ | |
| /* Find pitch lags */ | |
| void SKP_Silk_find_pitch_lags_FIX( | |
| SKP_Silk_encoder_state_FIX *psEnc, /* I/O encoder state */ | |
| SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ | |
| SKP_int16 res[], /* O residual */ | |
| const SKP_int16 x[] /* I Speech signal */ | |
| ); | |
| /* Find LPC and LTP coefficients */ | |
| void SKP_Silk_find_pred_coefs_FIX( | |
| SKP_Silk_encoder_state_FIX *psEnc, /* I/O encoder state */ | |
| SKP_Silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ | |
| const SKP_int16 res_pitch[], /* I Residual from pitch analysis */ | |
| const SKP_int16 x[] /* I Speech signal */ | |
| ); | |
| /* LPC analysis */ | |
| void SKP_Silk_find_LPC_FIX( | |
| SKP_int16 NLSF_Q15[], /* O NLSFs */ | |
| SKP_int8 *interpIndex, /* O NLSF interpolation index, only used for NLSF interpolation */ | |
| const SKP_int16 prev_NLSFq_Q15[], /* I previous NLSFs, only used for NLSF interpolation */ | |
| const SKP_int useInterpNLSFs, /* I Flag */ | |
| const SKP_int firstFrameAfterReset, /* I Flag */ | |
| const SKP_int LPC_order, /* I LPC order */ | |
| const SKP_int16 x[], /* I Input signal */ | |
| const SKP_int subfr_length, /* I Input signal subframe length including preceeding samples */ | |
| const SKP_int nb_subfr /* I: Number of subframes */ | |
| ); | |
| /* LTP analysis */ | |
| void SKP_Silk_find_LTP_FIX( | |
| SKP_int16 b_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */ | |
| SKP_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */ | |
| SKP_int *LTPredCodGain_Q7, /* O LTP coding gain */ | |
| const SKP_int16 r_lpc[], /* I residual signal after LPC signal + state for first 10 ms */ | |
| const SKP_int lag[ MAX_NB_SUBFR ], /* I LTP lags */ | |
| const SKP_int32 Wght_Q15[ MAX_NB_SUBFR ], /* I weights */ | |
| const SKP_int subfr_length, /* I subframe length */ | |
| const SKP_int nb_subfr, /* I number of subframes */ | |
| const SKP_int mem_offset, /* I number of samples in LTP memory */ | |
| SKP_int corr_rshifts[ MAX_NB_SUBFR ] /* O right shifts applied to correlations */ | |
| ); | |
| void SKP_Silk_LTP_analysis_filter_FIX( | |
| SKP_int16 *LTP_res, /* O: LTP residual signal of length MAX_NB_SUBFR * ( pre_length + subfr_length ) */ | |
| const SKP_int16 *x, /* I: Pointer to input signal with at least max( pitchL ) preceeding samples */ | |
| const SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],/* I: LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe */ | |
| const SKP_int pitchL[ MAX_NB_SUBFR ], /* I: Pitch lag, one for each subframe */ | |
| const SKP_int32 invGains_Q16[ MAX_NB_SUBFR ], /* I: Inverse quantization gains, one for each subframe */ | |
| const SKP_int subfr_length, /* I: Length of each subframe */ | |
| const SKP_int nb_subfr, /* I: Number of subframes */ | |
| const SKP_int pre_length /* I: Length of the preceeding samples starting at &x[0] for each subframe */ | |
| ); | |
| /* Calculates residual energies of input subframes where all subframes have LPC_order */ | |
| /* of preceeding samples */ | |
| void SKP_Silk_residual_energy_FIX( | |
| SKP_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */ | |
| SKP_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */ | |
| const SKP_int16 x[], /* I Input signal */ | |
| const SKP_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */ | |
| const SKP_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */ | |
| const SKP_int subfr_length, /* I Subframe length */ | |
| const SKP_int nb_subfr, /* I Number of subframes */ | |
| const SKP_int LPC_order /* I LPC order */ | |
| ); | |
| /* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */ | |
| SKP_int32 SKP_Silk_residual_energy16_covar_FIX( | |
| const SKP_int16 *c, /* I Prediction vector */ | |
| const SKP_int32 *wXX, /* I Correlation matrix */ | |
| const SKP_int32 *wXx, /* I Correlation vector */ | |
| SKP_int32 wxx, /* I Signal energy */ | |
| SKP_int D, /* I Dimension */ | |
| SKP_int cQ /* I Q value for c vector 0 - 15 */ | |
| ); | |
| /* Processing of gains */ | |
| void SKP_Silk_process_gains_FIX( | |
| SKP_Silk_encoder_state_FIX *psEnc, /* I/O Encoder state */ | |
| SKP_Silk_encoder_control_FIX *psEncCtrl /* I/O Encoder control */ | |
| ); | |
| /******************/ | |
| /* Linear Algebra */ | |
| /******************/ | |
| /* Calculates correlation matrix X'*X */ | |
| void SKP_Silk_corrMatrix_FIX( | |
| const SKP_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */ | |
| const SKP_int L, /* I Length of vectors */ | |
| const SKP_int order, /* I Max lag for correlation */ | |
| const SKP_int head_room, /* I Desired headroom */ | |
| SKP_int32 *XX, /* O Pointer to X'*X correlation matrix [ order x order ]*/ | |
| SKP_int *rshifts /* I/O Right shifts of correlations */ | |
| ); | |
| /* Calculates correlation vector X'*t */ | |
| void SKP_Silk_corrVector_FIX( | |
| const SKP_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */ | |
| const SKP_int16 *t, /* I Target vector [L] */ | |
| const SKP_int L, /* I Length of vectors */ | |
| const SKP_int order, /* I Max lag for correlation */ | |
| SKP_int32 *Xt, /* O Pointer to X'*t correlation vector [order] */ | |
| const SKP_int rshifts /* I Right shifts of correlations */ | |
| ); | |
| /* Add noise to matrix diagonal */ | |
| void SKP_Silk_regularize_correlations_FIX( | |
| SKP_int32 *XX, /* I/O Correlation matrices */ | |
| SKP_int32 *xx, /* I/O Correlation values */ | |
| SKP_int32 noise, /* I Noise to add */ | |
| SKP_int D /* I Dimension of XX */ | |
| ); | |
| /* Solves Ax = b, assuming A is symmetric */ | |
| void SKP_Silk_solve_LDL_FIX( | |
| SKP_int32 *A, /* I Pointer to symetric square matrix A */ | |
| SKP_int M, /* I Size of matrix */ | |
| const SKP_int32 *b, /* I Pointer to b vector */ | |
| SKP_int32 *x_Q16 /* O Pointer to x solution vector */ | |
| ); | |
| #ifndef FORCE_CPP_BUILD | |
| #ifdef __cplusplus | |
| } | |
| #endif /* __cplusplus */ | |
| #endif /* FORCE_CPP_BUILD */ | |
| #endif /* SKP_SILK_MAIN_FIX_H */ |