| /*********************************************************************** |
| 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_FLP_H |
| #define SILK_MAIN_FLP_H |
| |
| #include "SigProc_FLP.h" |
| #include "SigProc_FIX.h" |
| #include "structs_FLP.h" |
| #include "main.h" |
| #include "define.h" |
| #include "debug.h" |
| #include "entenc.h" |
| |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| |
| #define silk_encoder_state_Fxx silk_encoder_state_FLP |
| #define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FLP |
| #define silk_encode_frame_Fxx silk_encode_frame_FLP |
| |
| /*********************/ |
| /* 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_FLP( |
| silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ |
| opus_int activity /* I Decision of Opus voice activity detector */ |
| ); |
| |
| /* Encoder main function */ |
| opus_int silk_encode_frame_FLP( |
| silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ |
| opus_int32 *pnBytesOut, /* O 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_FLP *psEnc, /* I/O Encoder state FLP */ |
| int arch /* I Run-tim architecture */ |
| ); |
| |
| /* Control the Silk encoder */ |
| opus_int silk_control_encoder( |
| silk_encoder_state_FLP *psEnc, /* I/O Pointer to Silk encoder state FLP */ |
| silk_EncControlStruct *encControl, /* I Control structure */ |
| 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 |
| ); |
| |
| /**************************/ |
| /* Noise shaping analysis */ |
| /**************************/ |
| /* Compute noise shaping coefficients and initial gain values */ |
| void silk_noise_shape_analysis_FLP( |
| silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ |
| silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ |
| const silk_float *pitch_res, /* I LPC residual from pitch analysis */ |
| const silk_float *x /* I Input signal [frame_length + la_shape] */ |
| ); |
| |
| /* Autocorrelations for a warped frequency axis */ |
| void silk_warped_autocorrelation_FLP( |
| silk_float *corr, /* O Result [order + 1] */ |
| const silk_float *input, /* I Input data to correlate */ |
| const silk_float warping, /* 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_FLP( |
| silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ |
| silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ |
| opus_int condCoding /* I The type of conditional coding to use */ |
| ); |
| |
| /**********************************************/ |
| /* Prediction Analysis */ |
| /**********************************************/ |
| /* Find pitch lags */ |
| void silk_find_pitch_lags_FLP( |
| silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ |
| silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ |
| silk_float res[], /* O Residual */ |
| const silk_float x[], /* I Speech signal */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Find LPC and LTP coefficients */ |
| void silk_find_pred_coefs_FLP( |
| silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ |
| silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ |
| const silk_float res_pitch[], /* I Residual from pitch analysis */ |
| const silk_float x[], /* I Speech signal */ |
| opus_int condCoding /* I The type of conditional coding to use */ |
| ); |
| |
| /* LPC analysis */ |
| void silk_find_LPC_FLP( |
| silk_encoder_state *psEncC, /* I/O Encoder state */ |
| opus_int16 NLSF_Q15[], /* O NLSFs */ |
| const silk_float x[], /* I Input signal */ |
| const silk_float minInvGain /* I Prediction gain from LTP (dB) */ |
| ); |
| |
| /* LTP analysis */ |
| void silk_find_LTP_FLP( |
| silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */ |
| silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* O Weight for LTP quantization */ |
| const silk_float r_ptr[], /* I LPC residual */ |
| const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */ |
| const opus_int subfr_length, /* I Subframe length */ |
| const opus_int nb_subfr /* I number of subframes */ |
| ); |
| |
| void silk_LTP_analysis_filter_FLP( |
| silk_float *LTP_res, /* O LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */ |
| const silk_float *x, /* I Input signal, with preceding samples */ |
| const silk_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I LTP coefficients for each subframe */ |
| const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ |
| const silk_float invGains[ MAX_NB_SUBFR ], /* I Inverse quantization gains */ |
| 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 Preceding samples for each subframe */ |
| ); |
| |
| /* Calculates residual energies of input subframes where all subframes have LPC_order */ |
| /* of preceding samples */ |
| void silk_residual_energy_FLP( |
| silk_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */ |
| const silk_float x[], /* I Input signal */ |
| silk_float a[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */ |
| const silk_float gains[], /* 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 */ |
| ); |
| |
| /* 16th order LPC analysis filter */ |
| void silk_LPC_analysis_filter_FLP( |
| silk_float r_LPC[], /* O LPC residual signal */ |
| const silk_float PredCoef[], /* I LPC coefficients */ |
| const silk_float s[], /* I Input signal */ |
| const opus_int length, /* I Length of input signal */ |
| const opus_int Order /* I LPC order */ |
| ); |
| |
| /* LTP tap quantizer */ |
| void silk_quant_LTP_gains_FLP( |
| silk_float B[ 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_log_gain_Q7, /* I/O Cumulative max prediction gain */ |
| silk_float *pred_gain_dB, /* O LTP prediction gain */ |
| const silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Correlation matrix */ |
| const silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* I Correlation vector */ |
| 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 */ |
| ); |
| |
| /* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */ |
| silk_float silk_residual_energy_covar_FLP( /* O Weighted residual energy */ |
| const silk_float *c, /* I Filter coefficients */ |
| silk_float *wXX, /* I/O Weighted correlation matrix, reg. out */ |
| const silk_float *wXx, /* I Weighted correlation vector */ |
| const silk_float wxx, /* I Weighted correlation value */ |
| const opus_int D /* I Dimension */ |
| ); |
| |
| /* Processing of gains */ |
| void silk_process_gains_FLP( |
| silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ |
| silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ |
| opus_int condCoding /* I The type of conditional coding to use */ |
| ); |
| |
| /******************/ |
| /* Linear Algebra */ |
| /******************/ |
| /* Calculates correlation matrix X'*X */ |
| void silk_corrMatrix_FLP( |
| const silk_float *x, /* I x vector [ L+order-1 ] used to create X */ |
| const opus_int L, /* I Length of vectors */ |
| const opus_int Order, /* I Max lag for correlation */ |
| silk_float *XX /* O X'*X correlation matrix [order x order] */ |
| ); |
| |
| /* Calculates correlation vector X'*t */ |
| void silk_corrVector_FLP( |
| const silk_float *x, /* I x vector [L+order-1] used to create X */ |
| const silk_float *t, /* I Target vector [L] */ |
| const opus_int L, /* I Length of vecors */ |
| const opus_int Order, /* I Max lag for correlation */ |
| silk_float *Xt /* O X'*t correlation vector [order] */ |
| ); |
| |
| /* Apply sine window to signal vector. */ |
| /* Window types: */ |
| /* 1 -> sine window from 0 to pi/2 */ |
| /* 2 -> sine window from pi/2 to pi */ |
| void silk_apply_sine_window_FLP( |
| silk_float px_win[], /* O Pointer to windowed signal */ |
| const silk_float px[], /* I Pointer to input signal */ |
| const opus_int win_type, /* I Selects a window type */ |
| const opus_int length /* I Window length, multiple of 4 */ |
| ); |
| |
| /* Wrapper functions. Call flp / fix code */ |
| |
| /* Convert AR filter coefficients to NLSF parameters */ |
| void silk_A2NLSF_FLP( |
| opus_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */ |
| const silk_float *pAR, /* I LPC coefficients [ LPC_order ] */ |
| const opus_int LPC_order /* I LPC order */ |
| ); |
| |
| /* Convert NLSF parameters to AR prediction filter coefficients */ |
| void silk_NLSF2A_FLP( |
| silk_float *pAR, /* O LPC coefficients [ LPC_order ] */ |
| const opus_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */ |
| const opus_int LPC_order, /* I LPC order */ |
| int arch /* I Run-time architecture */ |
| ); |
| |
| /* Limit, stabilize, and quantize NLSFs */ |
| void silk_process_NLSFs_FLP( |
| silk_encoder_state *psEncC, /* I/O Encoder state */ |
| silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */ |
| opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */ |
| const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */ |
| ); |
| |
| /* Floating-point Silk NSQ wrapper */ |
| void silk_NSQ_wrapper_FLP( |
| silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ |
| silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ |
| SideInfoIndices *psIndices, /* I/O Quantization indices */ |
| silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */ |
| opus_int8 pulses[], /* O Quantized pulse signal */ |
| const silk_float x[] /* I Prefiltered input signal */ |
| ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |
