1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libopus/silk/float/main_FLP.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,312 @@
1.4 +/***********************************************************************
1.5 +Copyright (c) 2006-2011, Skype Limited. All rights reserved.
1.6 +Redistribution and use in source and binary forms, with or without
1.7 +modification, are permitted provided that the following conditions
1.8 +are met:
1.9 +- Redistributions of source code must retain the above copyright notice,
1.10 +this list of conditions and the following disclaimer.
1.11 +- Redistributions in binary form must reproduce the above copyright
1.12 +notice, this list of conditions and the following disclaimer in the
1.13 +documentation and/or other materials provided with the distribution.
1.14 +- Neither the name of Internet Society, IETF or IETF Trust, nor the
1.15 +names of specific contributors, may be used to endorse or promote
1.16 +products derived from this software without specific prior written
1.17 +permission.
1.18 +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
1.19 +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.20 +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.21 +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
1.22 +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.23 +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.24 +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.25 +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.26 +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.27 +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.28 +POSSIBILITY OF SUCH DAMAGE.
1.29 +***********************************************************************/
1.30 +
1.31 +#ifndef SILK_MAIN_FLP_H
1.32 +#define SILK_MAIN_FLP_H
1.33 +
1.34 +#include "SigProc_FLP.h"
1.35 +#include "SigProc_FIX.h"
1.36 +#include "structs_FLP.h"
1.37 +#include "main.h"
1.38 +#include "define.h"
1.39 +#include "debug.h"
1.40 +#include "entenc.h"
1.41 +
1.42 +#ifdef __cplusplus
1.43 +extern "C"
1.44 +{
1.45 +#endif
1.46 +
1.47 +#define silk_encoder_state_Fxx silk_encoder_state_FLP
1.48 +#define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FLP
1.49 +#define silk_encode_frame_Fxx silk_encode_frame_FLP
1.50 +
1.51 +/*********************/
1.52 +/* Encoder Functions */
1.53 +/*********************/
1.54 +
1.55 +/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
1.56 +void silk_HP_variable_cutoff(
1.57 + silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */
1.58 +);
1.59 +
1.60 +/* Encoder main function */
1.61 +void silk_encode_do_VAD_FLP(
1.62 + silk_encoder_state_FLP *psEnc /* I/O Encoder state FLP */
1.63 +);
1.64 +
1.65 +/* Encoder main function */
1.66 +opus_int silk_encode_frame_FLP(
1.67 + silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
1.68 + opus_int32 *pnBytesOut, /* O Number of payload bytes; */
1.69 + ec_enc *psRangeEnc, /* I/O compressor data structure */
1.70 + opus_int condCoding, /* I The type of conditional coding to use */
1.71 + opus_int maxBits, /* I If > 0: maximum number of output bits */
1.72 + opus_int useCBR /* I Flag to force constant-bitrate operation */
1.73 +);
1.74 +
1.75 +/* Initializes the Silk encoder state */
1.76 +opus_int silk_init_encoder(
1.77 + silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
1.78 + int arch /* I Run-tim architecture */
1.79 +);
1.80 +
1.81 +/* Control the Silk encoder */
1.82 +opus_int silk_control_encoder(
1.83 + silk_encoder_state_FLP *psEnc, /* I/O Pointer to Silk encoder state FLP */
1.84 + silk_EncControlStruct *encControl, /* I Control structure */
1.85 + const opus_int32 TargetRate_bps, /* I Target max bitrate (bps) */
1.86 + const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */
1.87 + const opus_int channelNb, /* I Channel number */
1.88 + const opus_int force_fs_kHz
1.89 +);
1.90 +
1.91 +/****************/
1.92 +/* Prefiltering */
1.93 +/****************/
1.94 +void silk_prefilter_FLP(
1.95 + silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
1.96 + const silk_encoder_control_FLP *psEncCtrl, /* I Encoder control FLP */
1.97 + silk_float xw[], /* O Weighted signal */
1.98 + const silk_float x[] /* I Speech signal */
1.99 +);
1.100 +
1.101 +/**************************/
1.102 +/* Noise shaping analysis */
1.103 +/**************************/
1.104 +/* Compute noise shaping coefficients and initial gain values */
1.105 +void silk_noise_shape_analysis_FLP(
1.106 + silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
1.107 + silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
1.108 + const silk_float *pitch_res, /* I LPC residual from pitch analysis */
1.109 + const silk_float *x /* I Input signal [frame_length + la_shape] */
1.110 +);
1.111 +
1.112 +/* Autocorrelations for a warped frequency axis */
1.113 +void silk_warped_autocorrelation_FLP(
1.114 + silk_float *corr, /* O Result [order + 1] */
1.115 + const silk_float *input, /* I Input data to correlate */
1.116 + const silk_float warping, /* I Warping coefficient */
1.117 + const opus_int length, /* I Length of input */
1.118 + const opus_int order /* I Correlation order (even) */
1.119 +);
1.120 +
1.121 +/* Calculation of LTP state scaling */
1.122 +void silk_LTP_scale_ctrl_FLP(
1.123 + silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
1.124 + silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
1.125 + opus_int condCoding /* I The type of conditional coding to use */
1.126 +);
1.127 +
1.128 +/**********************************************/
1.129 +/* Prediction Analysis */
1.130 +/**********************************************/
1.131 +/* Find pitch lags */
1.132 +void silk_find_pitch_lags_FLP(
1.133 + silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
1.134 + silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
1.135 + silk_float res[], /* O Residual */
1.136 + const silk_float x[], /* I Speech signal */
1.137 + int arch /* I Run-time architecture */
1.138 +);
1.139 +
1.140 +/* Find LPC and LTP coefficients */
1.141 +void silk_find_pred_coefs_FLP(
1.142 + silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
1.143 + silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
1.144 + const silk_float res_pitch[], /* I Residual from pitch analysis */
1.145 + const silk_float x[], /* I Speech signal */
1.146 + opus_int condCoding /* I The type of conditional coding to use */
1.147 +);
1.148 +
1.149 +/* LPC analysis */
1.150 +void silk_find_LPC_FLP(
1.151 + silk_encoder_state *psEncC, /* I/O Encoder state */
1.152 + opus_int16 NLSF_Q15[], /* O NLSFs */
1.153 + const silk_float x[], /* I Input signal */
1.154 + const silk_float minInvGain /* I Prediction gain from LTP (dB) */
1.155 +);
1.156 +
1.157 +/* LTP analysis */
1.158 +void silk_find_LTP_FLP(
1.159 + silk_float b[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
1.160 + silk_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
1.161 + silk_float *LTPredCodGain, /* O LTP coding gain */
1.162 + const silk_float r_lpc[], /* I LPC residual */
1.163 + const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
1.164 + const silk_float Wght[ MAX_NB_SUBFR ], /* I Weights */
1.165 + const opus_int subfr_length, /* I Subframe length */
1.166 + const opus_int nb_subfr, /* I number of subframes */
1.167 + const opus_int mem_offset /* I Number of samples in LTP memory */
1.168 +);
1.169 +
1.170 +void silk_LTP_analysis_filter_FLP(
1.171 + silk_float *LTP_res, /* O LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */
1.172 + const silk_float *x, /* I Input signal, with preceding samples */
1.173 + const silk_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I LTP coefficients for each subframe */
1.174 + const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
1.175 + const silk_float invGains[ MAX_NB_SUBFR ], /* I Inverse quantization gains */
1.176 + const opus_int subfr_length, /* I Length of each subframe */
1.177 + const opus_int nb_subfr, /* I number of subframes */
1.178 + const opus_int pre_length /* I Preceding samples for each subframe */
1.179 +);
1.180 +
1.181 +/* Calculates residual energies of input subframes where all subframes have LPC_order */
1.182 +/* of preceding samples */
1.183 +void silk_residual_energy_FLP(
1.184 + silk_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
1.185 + const silk_float x[], /* I Input signal */
1.186 + silk_float a[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
1.187 + const silk_float gains[], /* I Quantization gains */
1.188 + const opus_int subfr_length, /* I Subframe length */
1.189 + const opus_int nb_subfr, /* I number of subframes */
1.190 + const opus_int LPC_order /* I LPC order */
1.191 +);
1.192 +
1.193 +/* 16th order LPC analysis filter */
1.194 +void silk_LPC_analysis_filter_FLP(
1.195 + silk_float r_LPC[], /* O LPC residual signal */
1.196 + const silk_float PredCoef[], /* I LPC coefficients */
1.197 + const silk_float s[], /* I Input signal */
1.198 + const opus_int length, /* I Length of input signal */
1.199 + const opus_int Order /* I LPC order */
1.200 +);
1.201 +
1.202 +/* LTP tap quantizer */
1.203 +void silk_quant_LTP_gains_FLP(
1.204 + silk_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (Un-)quantized LTP gains */
1.205 + opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
1.206 + opus_int8 *periodicity_index, /* O Periodicity index */
1.207 + opus_int32 *sum_log_gain_Q7, /* I/O Cumulative max prediction gain */
1.208 + const silk_float W[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Error weights */
1.209 + const opus_int mu_Q10, /* I Mu value (R/D tradeoff) */
1.210 + const opus_int lowComplexity, /* I Flag for low complexity */
1.211 + const opus_int nb_subfr /* I number of subframes */
1.212 +);
1.213 +
1.214 +/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
1.215 +silk_float silk_residual_energy_covar_FLP( /* O Weighted residual energy */
1.216 + const silk_float *c, /* I Filter coefficients */
1.217 + silk_float *wXX, /* I/O Weighted correlation matrix, reg. out */
1.218 + const silk_float *wXx, /* I Weighted correlation vector */
1.219 + const silk_float wxx, /* I Weighted correlation value */
1.220 + const opus_int D /* I Dimension */
1.221 +);
1.222 +
1.223 +/* Processing of gains */
1.224 +void silk_process_gains_FLP(
1.225 + silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
1.226 + silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
1.227 + opus_int condCoding /* I The type of conditional coding to use */
1.228 +);
1.229 +
1.230 +/******************/
1.231 +/* Linear Algebra */
1.232 +/******************/
1.233 +/* Calculates correlation matrix X'*X */
1.234 +void silk_corrMatrix_FLP(
1.235 + const silk_float *x, /* I x vector [ L+order-1 ] used to create X */
1.236 + const opus_int L, /* I Length of vectors */
1.237 + const opus_int Order, /* I Max lag for correlation */
1.238 + silk_float *XX /* O X'*X correlation matrix [order x order] */
1.239 +);
1.240 +
1.241 +/* Calculates correlation vector X'*t */
1.242 +void silk_corrVector_FLP(
1.243 + const silk_float *x, /* I x vector [L+order-1] used to create X */
1.244 + const silk_float *t, /* I Target vector [L] */
1.245 + const opus_int L, /* I Length of vecors */
1.246 + const opus_int Order, /* I Max lag for correlation */
1.247 + silk_float *Xt /* O X'*t correlation vector [order] */
1.248 +);
1.249 +
1.250 +/* Add noise to matrix diagonal */
1.251 +void silk_regularize_correlations_FLP(
1.252 + silk_float *XX, /* I/O Correlation matrices */
1.253 + silk_float *xx, /* I/O Correlation values */
1.254 + const silk_float noise, /* I Noise energy to add */
1.255 + const opus_int D /* I Dimension of XX */
1.256 +);
1.257 +
1.258 +/* Function to solve linear equation Ax = b, where A is an MxM symmetric matrix */
1.259 +void silk_solve_LDL_FLP(
1.260 + silk_float *A, /* I/O Symmetric square matrix, out: reg. */
1.261 + const opus_int M, /* I Size of matrix */
1.262 + const silk_float *b, /* I Pointer to b vector */
1.263 + silk_float *x /* O Pointer to x solution vector */
1.264 +);
1.265 +
1.266 +/* Apply sine window to signal vector. */
1.267 +/* Window types: */
1.268 +/* 1 -> sine window from 0 to pi/2 */
1.269 +/* 2 -> sine window from pi/2 to pi */
1.270 +void silk_apply_sine_window_FLP(
1.271 + silk_float px_win[], /* O Pointer to windowed signal */
1.272 + const silk_float px[], /* I Pointer to input signal */
1.273 + const opus_int win_type, /* I Selects a window type */
1.274 + const opus_int length /* I Window length, multiple of 4 */
1.275 +);
1.276 +
1.277 +/* Wrapper functions. Call flp / fix code */
1.278 +
1.279 +/* Convert AR filter coefficients to NLSF parameters */
1.280 +void silk_A2NLSF_FLP(
1.281 + opus_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */
1.282 + const silk_float *pAR, /* I LPC coefficients [ LPC_order ] */
1.283 + const opus_int LPC_order /* I LPC order */
1.284 +);
1.285 +
1.286 +/* Convert NLSF parameters to AR prediction filter coefficients */
1.287 +void silk_NLSF2A_FLP(
1.288 + silk_float *pAR, /* O LPC coefficients [ LPC_order ] */
1.289 + const opus_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */
1.290 + const opus_int LPC_order /* I LPC order */
1.291 +);
1.292 +
1.293 +/* Limit, stabilize, and quantize NLSFs */
1.294 +void silk_process_NLSFs_FLP(
1.295 + silk_encoder_state *psEncC, /* I/O Encoder state */
1.296 + silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
1.297 + opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
1.298 + const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
1.299 +);
1.300 +
1.301 +/* Floating-point Silk NSQ wrapper */
1.302 +void silk_NSQ_wrapper_FLP(
1.303 + silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
1.304 + silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
1.305 + SideInfoIndices *psIndices, /* I/O Quantization indices */
1.306 + silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */
1.307 + opus_int8 pulses[], /* O Quantized pulse signal */
1.308 + const silk_float x[] /* I Prefiltered input signal */
1.309 +);
1.310 +
1.311 +#ifdef __cplusplus
1.312 +}
1.313 +#endif
1.314 +
1.315 +#endif
