| /*********************************************************************** |
| 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_FIX_H |
| #define SILK_MAIN_FIX_H |
| |
| #include "SigProc_FIX.h" |
| #include "structs_FIX.h" |
| #include "control.h" |
| #include "main.h" |
| #include "PLC.h" |
| #include "debug.h" |
| #include "entenc.h" |
| |
| #ifndef FORCE_CPP_BUILD |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| #endif |
| |
| #define silk_encoder_state_Fxx silk_encoder_state_FIX |
| #define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FIX |
| #define silk_encode_frame_Fxx silk_encode_frame_FIX |
| |
| /*********************/ |
| /* Encoder Functions */ |
| /*********************/ |
| |
| /* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */ |
| void silk_HP_variable_cutoff( |
| silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */ |
| ); |
| |
| /* Encoder main function */ |
| void silk_encode_do_VAD_FIX( |
| silk_encoder_state_FIX *psEnc /* I/O Pointer to Silk FIX encoder state */ |
| ); |
| |
| /* Encoder main function */ |
| opus_int silk_encode_frame_FIX( |
| silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */ |
| opus_int32 *pnBytesOut, /* O Pointer to number of payload bytes; */ |
| ec_enc *psRangeEnc, /* I/O compressor data structure */ |
| opus_int condCoding, /* I The type of conditional coding to use */ |
| opus_int maxBits, /* I If > 0: maximum number of output bits */ |
| opus_int useCBR /* I Flag to force constant-bitrate operation */ |
| ); |
| |
| /* Initializes the Silk encoder state */ |
| opus_int silk_init_encoder( |
| silk_encoder_state_Fxx *psEnc, /* I/O Pointer to Silk FIX encoder state */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Control the Silk encoder */ |
| opus_int silk_control_encoder( |
| silk_encoder_state_Fxx *psEnc, /* I/O Pointer to Silk encoder state */ |
| silk_EncControlStruct *encControl, /* I Control structure */ |
| const opus_int32 TargetRate_bps, /* I Target max bitrate (bps) */ |
| const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */ |
| const opus_int channelNb, /* I Channel number */ |
| const opus_int force_fs_kHz |
| ); |
| |
| /****************/ |
| /* Prefiltering */ |
| /****************/ |
| void silk_prefilter_FIX( |
| silk_encoder_state_FIX *psEnc, /* I/O Encoder state */ |
| const silk_encoder_control_FIX *psEncCtrl, /* I Encoder control */ |
| opus_int32 xw_Q10[], /* O Weighted signal */ |
| const opus_int16 x[] /* I Speech signal */ |
| ); |
| |
| void silk_warped_LPC_analysis_filter_FIX_c( |
| opus_int32 state[], /* I/O State [order + 1] */ |
| opus_int32 res_Q2[], /* O Residual signal [length] */ |
| const opus_int16 coef_Q13[], /* I Coefficients [order] */ |
| const opus_int16 input[], /* I Input signal [length] */ |
| const opus_int16 lambda_Q16, /* I Warping factor */ |
| const opus_int length, /* I Length of input signal */ |
| const opus_int order /* I Filter order (even) */ |
| ); |
| |
| |
| /**************************/ |
| /* Noise shaping analysis */ |
| /**************************/ |
| /* Compute noise shaping coefficients and initial gain values */ |
| void silk_noise_shape_analysis_FIX( |
| silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */ |
| silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control FIX */ |
| const opus_int16 *pitch_res, /* I LPC residual from pitch analysis */ |
| const opus_int16 *x, /* I Input signal [ frame_length + la_shape ] */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Autocorrelations for a warped frequency axis */ |
| void silk_warped_autocorrelation_FIX( |
| opus_int32 *corr, /* O Result [order + 1] */ |
| opus_int *scale, /* O Scaling of the correlation vector */ |
| const opus_int16 *input, /* I Input data to correlate */ |
| const opus_int warping_Q16, /* I Warping coefficient */ |
| const opus_int length, /* I Length of input */ |
| const opus_int order /* I Correlation order (even) */ |
| ); |
| |
| /* Calculation of LTP state scaling */ |
| void silk_LTP_scale_ctrl_FIX( |
| silk_encoder_state_FIX *psEnc, /* I/O encoder state */ |
| silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ |
| opus_int condCoding /* I The type of conditional coding to use */ |
| ); |
| |
| /**********************************************/ |
| /* Prediction Analysis */ |
| /**********************************************/ |
| /* Find pitch lags */ |
| void silk_find_pitch_lags_FIX( |
| silk_encoder_state_FIX *psEnc, /* I/O encoder state */ |
| silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ |
| opus_int16 res[], /* O residual */ |
| const opus_int16 x[], /* I Speech signal */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Find LPC and LTP coefficients */ |
| void silk_find_pred_coefs_FIX( |
| silk_encoder_state_FIX *psEnc, /* I/O encoder state */ |
| silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ |
| const opus_int16 res_pitch[], /* I Residual from pitch analysis */ |
| const opus_int16 x[], /* I Speech signal */ |
| opus_int condCoding /* I The type of conditional coding to use */ |
| ); |
| |
| /* LPC analysis */ |
| void silk_find_LPC_FIX( |
| silk_encoder_state *psEncC, /* I/O Encoder state */ |
| opus_int16 NLSF_Q15[], /* O NLSFs */ |
| const opus_int16 x[], /* I Input signal */ |
| const opus_int32 minInvGain_Q30 /* I Inverse of max prediction gain */ |
| ); |
| |
| /* LTP analysis */ |
| void silk_find_LTP_FIX( |
| opus_int16 b_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */ |
| opus_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */ |
| opus_int *LTPredCodGain_Q7, /* O LTP coding gain */ |
| const opus_int16 r_lpc[], /* I residual signal after LPC signal + state for first 10 ms */ |
| const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */ |
| const opus_int32 Wght_Q15[ MAX_NB_SUBFR ], /* I weights */ |
| const opus_int subfr_length, /* I subframe length */ |
| const opus_int nb_subfr, /* I number of subframes */ |
| const opus_int mem_offset, /* I number of samples in LTP memory */ |
| opus_int corr_rshifts[ MAX_NB_SUBFR ], /* O right shifts applied to correlations */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| void silk_LTP_analysis_filter_FIX( |
| opus_int16 *LTP_res, /* O LTP residual signal of length MAX_NB_SUBFR * ( pre_length + subfr_length ) */ |
| const opus_int16 *x, /* I Pointer to input signal with at least max( pitchL ) preceding samples */ |
| const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],/* I LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe */ |
| const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag, one for each subframe */ |
| const opus_int32 invGains_Q16[ MAX_NB_SUBFR ], /* I Inverse quantization gains, one for each subframe */ |
| const opus_int subfr_length, /* I Length of each subframe */ |
| const opus_int nb_subfr, /* I Number of subframes */ |
| const opus_int pre_length /* I Length of the preceding samples starting at &x[0] for each subframe */ |
| ); |
| |
| /* Calculates residual energies of input subframes where all subframes have LPC_order */ |
| /* of preceding samples */ |
| void silk_residual_energy_FIX( |
| opus_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */ |
| opus_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */ |
| const opus_int16 x[], /* I Input signal */ |
| opus_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */ |
| const opus_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */ |
| const opus_int subfr_length, /* I Subframe length */ |
| const opus_int nb_subfr, /* I Number of subframes */ |
| const opus_int LPC_order, /* I LPC order */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */ |
| opus_int32 silk_residual_energy16_covar_FIX( |
| const opus_int16 *c, /* I Prediction vector */ |
| const opus_int32 *wXX, /* I Correlation matrix */ |
| const opus_int32 *wXx, /* I Correlation vector */ |
| opus_int32 wxx, /* I Signal energy */ |
| opus_int D, /* I Dimension */ |
| opus_int cQ /* I Q value for c vector 0 - 15 */ |
| ); |
| |
| /* Processing of gains */ |
| void silk_process_gains_FIX( |
| silk_encoder_state_FIX *psEnc, /* I/O Encoder state */ |
| silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control */ |
| opus_int condCoding /* I The type of conditional coding to use */ |
| ); |
| |
| /******************/ |
| /* Linear Algebra */ |
| /******************/ |
| /* Calculates correlation matrix X'*X */ |
| void silk_corrMatrix_FIX( |
| const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */ |
| const opus_int L, /* I Length of vectors */ |
| const opus_int order, /* I Max lag for correlation */ |
| const opus_int head_room, /* I Desired headroom */ |
| opus_int32 *XX, /* O Pointer to X'*X correlation matrix [ order x order ] */ |
| opus_int *rshifts, /* I/O Right shifts of correlations */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Calculates correlation vector X'*t */ |
| void silk_corrVector_FIX( |
| const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */ |
| const opus_int16 *t, /* I Target vector [L] */ |
| const opus_int L, /* I Length of vectors */ |
| const opus_int order, /* I Max lag for correlation */ |
| opus_int32 *Xt, /* O Pointer to X'*t correlation vector [order] */ |
| const opus_int rshifts, /* I Right shifts of correlations */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Add noise to matrix diagonal */ |
| void silk_regularize_correlations_FIX( |
| opus_int32 *XX, /* I/O Correlation matrices */ |
| opus_int32 *xx, /* I/O Correlation values */ |
| opus_int32 noise, /* I Noise to add */ |
| opus_int D /* I Dimension of XX */ |
| ); |
| |
| /* Solves Ax = b, assuming A is symmetric */ |
| void silk_solve_LDL_FIX( |
| opus_int32 *A, /* I Pointer to symetric square matrix A */ |
| opus_int M, /* I Size of matrix */ |
| const opus_int32 *b, /* I Pointer to b vector */ |
| opus_int32 *x_Q16 /* O Pointer to x solution vector */ |
| ); |
| |
| #ifndef FORCE_CPP_BUILD |
| #ifdef __cplusplus |
| } |
| #endif /* __cplusplus */ |
| #endif /* FORCE_CPP_BUILD */ |
| #endif /* SILK_MAIN_FIX_H */ |
