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| 1 /*********************************************************************** |
| 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| 3 Redistribution and use in source and binary forms, with or without |
| 4 modification, are permitted provided that the following conditions |
| 5 are met: |
| 6 - Redistributions of source code must retain the above copyright notice, |
| 7 this list of conditions and the following disclaimer. |
| 8 - Redistributions in binary form must reproduce the above copyright |
| 9 notice, this list of conditions and the following disclaimer in the |
| 10 documentation and/or other materials provided with the distribution. |
| 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the |
| 12 names of specific contributors, may be used to endorse or promote |
| 13 products derived from this software without specific prior written |
| 14 permission. |
| 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” |
| 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 25 POSSIBILITY OF SUCH DAMAGE. |
| 26 ***********************************************************************/ |
| 27 |
| 28 #ifndef SILK_MAIN_FLP_H |
| 29 #define SILK_MAIN_FLP_H |
| 30 |
| 31 #include "SigProc_FLP.h" |
| 32 #include "SigProc_FIX.h" |
| 33 #include "structs_FLP.h" |
| 34 #include "main.h" |
| 35 #include "define.h" |
| 36 #include "debug.h" |
| 37 #include "entenc.h" |
| 38 |
| 39 #ifdef __cplusplus |
| 40 extern "C" |
| 41 { |
| 42 #endif |
| 43 |
| 44 #define silk_encoder_state_Fxx silk_encoder_state_FLP |
| 45 #define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FLP |
| 46 #define silk_encode_frame_Fxx silk_encode_frame_FLP |
| 47 |
| 48 /*********************/ |
| 49 /* Encoder Functions */ |
| 50 /*********************/ |
| 51 |
| 52 /* High-pass filter with cutoff frequency adaptation based on pitch lag statisti
cs */ |
| 53 void silk_HP_variable_cutoff( |
| 54 silk_encoder_state_Fxx state_Fxx[] /* I/O
Encoder states */ |
| 55 ); |
| 56 |
| 57 /* Encoder main function */ |
| 58 void silk_encode_do_VAD_FLP( |
| 59 silk_encoder_state_FLP *psEnc /* I/O
Encoder state FLP */ |
| 60 ); |
| 61 |
| 62 /* Encoder main function */ |
| 63 opus_int silk_encode_frame_FLP( |
| 64 silk_encoder_state_FLP *psEnc, /* I/O
Encoder state FLP */ |
| 65 opus_int32 *pnBytesOut, /* O
Number of payload bytes; */ |
| 66 ec_enc *psRangeEnc, /* I/O
compressor data structure */ |
| 67 opus_int condCoding, /* I
The type of conditional coding to use */ |
| 68 opus_int maxBits, /* I
If > 0: maximum number of output bits */ |
| 69 opus_int useCBR /* I
Flag to force constant-bitrate operation */ |
| 70 ); |
| 71 |
| 72 /* Initializes the Silk encoder state */ |
| 73 opus_int silk_init_encoder( |
| 74 silk_encoder_state_FLP *psEnc /* I/O
Encoder state FLP */ |
| 75 ); |
| 76 |
| 77 /* Control the Silk encoder */ |
| 78 opus_int silk_control_encoder( |
| 79 silk_encoder_state_FLP *psEnc, /* I/O
Pointer to Silk encoder state FLP */ |
| 80 silk_EncControlStruct *encControl, /* I
Control structure */ |
| 81 const opus_int32 TargetRate_bps, /* I
Target max bitrate (bps) */ |
| 82 const opus_int allow_bw_switch, /* I
Flag to allow switching audio bandwidth */ |
| 83 const opus_int channelNb, /* I
Channel number */ |
| 84 const opus_int force_fs_kHz |
| 85 ); |
| 86 |
| 87 /****************/ |
| 88 /* Prefiltering */ |
| 89 /****************/ |
| 90 void silk_prefilter_FLP( |
| 91 silk_encoder_state_FLP *psEnc, /* I/O
Encoder state FLP */ |
| 92 const silk_encoder_control_FLP *psEncCtrl, /* I
Encoder control FLP */ |
| 93 silk_float xw[], /* O
Weighted signal */ |
| 94 const silk_float x[] /* I
Speech signal */ |
| 95 ); |
| 96 |
| 97 /**************************/ |
| 98 /* Noise shaping analysis */ |
| 99 /**************************/ |
| 100 /* Compute noise shaping coefficients and initial gain values */ |
| 101 void silk_noise_shape_analysis_FLP( |
| 102 silk_encoder_state_FLP *psEnc, /* I/O
Encoder state FLP */ |
| 103 silk_encoder_control_FLP *psEncCtrl, /* I/O
Encoder control FLP */ |
| 104 const silk_float *pitch_res, /* I
LPC residual from pitch analysis */ |
| 105 const silk_float *x /* I
Input signal [frame_length + la_shape] */ |
| 106 ); |
| 107 |
| 108 /* Autocorrelations for a warped frequency axis */ |
| 109 void silk_warped_autocorrelation_FLP( |
| 110 silk_float *corr, /* O
Result [order + 1] */ |
| 111 const silk_float *input, /* I
Input data to correlate */ |
| 112 const silk_float warping, /* I
Warping coefficient */ |
| 113 const opus_int length, /* I
Length of input */ |
| 114 const opus_int order /* I
Correlation order (even) */ |
| 115 ); |
| 116 |
| 117 /* Calculation of LTP state scaling */ |
| 118 void silk_LTP_scale_ctrl_FLP( |
| 119 silk_encoder_state_FLP *psEnc, /* I/O
Encoder state FLP */ |
| 120 silk_encoder_control_FLP *psEncCtrl, /* I/O
Encoder control FLP */ |
| 121 opus_int condCoding /* I
The type of conditional coding to use */ |
| 122 ); |
| 123 |
| 124 /**********************************************/ |
| 125 /* Prediction Analysis */ |
| 126 /**********************************************/ |
| 127 /* Find pitch lags */ |
| 128 void silk_find_pitch_lags_FLP( |
| 129 silk_encoder_state_FLP *psEnc, /* I/O
Encoder state FLP */ |
| 130 silk_encoder_control_FLP *psEncCtrl, /* I/O
Encoder control FLP */ |
| 131 silk_float res[], /* O
Residual */ |
| 132 const silk_float x[] /* I
Speech signal */ |
| 133 ); |
| 134 |
| 135 /* Find LPC and LTP coefficients */ |
| 136 void silk_find_pred_coefs_FLP( |
| 137 silk_encoder_state_FLP *psEnc, /* I/O
Encoder state FLP */ |
| 138 silk_encoder_control_FLP *psEncCtrl, /* I/O
Encoder control FLP */ |
| 139 const silk_float res_pitch[], /* I
Residual from pitch analysis */ |
| 140 const silk_float x[], /* I
Speech signal */ |
| 141 opus_int condCoding /* I
The type of conditional coding to use */ |
| 142 ); |
| 143 |
| 144 /* LPC analysis */ |
| 145 void silk_find_LPC_FLP( |
| 146 silk_encoder_state *psEncC, /* I/O
Encoder state */ |
| 147 opus_int16 NLSF_Q15[], /* O
NLSFs */ |
| 148 const silk_float x[], /* I
Input signal */ |
| 149 const silk_float minInvGain /* I
Prediction gain from LTP (dB) */ |
| 150 ); |
| 151 |
| 152 /* LTP analysis */ |
| 153 void silk_find_LTP_FLP( |
| 154 silk_float b[ MAX_NB_SUBFR * LTP_ORDER ], /* O
LTP coefs */ |
| 155 silk_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ]
, /* O Weight for LTP quantization */ |
| 156 silk_float *LTPredCodGain, /* O
LTP coding gain */ |
| 157 const silk_float r_lpc[], /* I
LPC residual */ |
| 158 const opus_int lag[ MAX_NB_SUBFR ], /* I
LTP lags */ |
| 159 const silk_float Wght[ MAX_NB_SUBFR ], /* I
Weights */ |
| 160 const opus_int subfr_length, /* I
Subframe length */ |
| 161 const opus_int nb_subfr, /* I
number of subframes */ |
| 162 const opus_int mem_offset /* I
Number of samples in LTP memory */ |
| 163 ); |
| 164 |
| 165 void silk_LTP_analysis_filter_FLP( |
| 166 silk_float *LTP_res, /* O
LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */ |
| 167 const silk_float *x, /* I
Input signal, with preceeding samples */ |
| 168 const silk_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I
LTP coefficients for each subframe */ |
| 169 const opus_int pitchL[ MAX_NB_SUBFR ], /* I
Pitch lags */ |
| 170 const silk_float invGains[ MAX_NB_SUBFR ], /* I
Inverse quantization gains */ |
| 171 const opus_int subfr_length, /* I
Length of each subframe */ |
| 172 const opus_int nb_subfr, /* I
number of subframes */ |
| 173 const opus_int pre_length /* I
Preceeding samples for each subframe */ |
| 174 ); |
| 175 |
| 176 /* Calculates residual energies of input subframes where all subframes have LPC_
order */ |
| 177 /* of preceeding samples
*/ |
| 178 void silk_residual_energy_FLP( |
| 179 silk_float nrgs[ MAX_NB_SUBFR ], /* O
Residual energy per subframe */ |
| 180 const silk_float x[], /* I
Input signal */ |
| 181 silk_float a[ 2 ][ MAX_LPC_ORDER ], /* I
AR coefs for each frame half */ |
| 182 const silk_float gains[], /* I
Quantization gains */ |
| 183 const opus_int subfr_length, /* I
Subframe length */ |
| 184 const opus_int nb_subfr, /* I
number of subframes */ |
| 185 const opus_int LPC_order /* I
LPC order */ |
| 186 ); |
| 187 |
| 188 /* 16th order LPC analysis filter */ |
| 189 void silk_LPC_analysis_filter_FLP( |
| 190 silk_float r_LPC[], /* O
LPC residual signal */ |
| 191 const silk_float PredCoef[], /* I
LPC coefficients */ |
| 192 const silk_float s[], /* I
Input signal */ |
| 193 const opus_int length, /* I
Length of input signal */ |
| 194 const opus_int Order /* I
LPC order */ |
| 195 ); |
| 196 |
| 197 /* LTP tap quantizer */ |
| 198 void silk_quant_LTP_gains_FLP( |
| 199 silk_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O
(Un-)quantized LTP gains */ |
| 200 opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O
Codebook index */ |
| 201 opus_int8 *periodicity_index, /* O
Periodicity index */ |
| 202 const silk_float W[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /
* I Error weights */ |
| 203 const opus_int mu_Q10, /* I
Mu value (R/D tradeoff) */ |
| 204 const opus_int lowComplexity, /* I
Flag for low complexity */ |
| 205 const opus_int nb_subfr /* I
number of subframes */ |
| 206 ); |
| 207 |
| 208 /* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */ |
| 209 silk_float silk_residual_energy_covar_FLP( /* O
Weighted residual energy */ |
| 210 const silk_float *c, /* I
Filter coefficients */ |
| 211 silk_float *wXX, /* I/O
Weighted correlation matrix, reg. out */ |
| 212 const silk_float *wXx, /* I
Weighted correlation vector */ |
| 213 const silk_float wxx, /* I
Weighted correlation value */ |
| 214 const opus_int D /* I
Dimension */ |
| 215 ); |
| 216 |
| 217 /* Processing of gains */ |
| 218 void silk_process_gains_FLP( |
| 219 silk_encoder_state_FLP *psEnc, /* I/O
Encoder state FLP */ |
| 220 silk_encoder_control_FLP *psEncCtrl, /* I/O
Encoder control FLP */ |
| 221 opus_int condCoding /* I
The type of conditional coding to use */ |
| 222 ); |
| 223 |
| 224 /******************/ |
| 225 /* Linear Algebra */ |
| 226 /******************/ |
| 227 /* Calculates correlation matrix X'*X */ |
| 228 void silk_corrMatrix_FLP( |
| 229 const silk_float *x, /* I
x vector [ L+order-1 ] used to create X */ |
| 230 const opus_int L, /* I
Length of vectors */ |
| 231 const opus_int Order, /* I
Max lag for correlation */ |
| 232 silk_float *XX /* O
X'*X correlation matrix [order x order] */ |
| 233 ); |
| 234 |
| 235 /* Calculates correlation vector X'*t */ |
| 236 void silk_corrVector_FLP( |
| 237 const silk_float *x, /* I
x vector [L+order-1] used to create X */ |
| 238 const silk_float *t, /* I
Target vector [L] */ |
| 239 const opus_int L, /* I
Length of vecors */ |
| 240 const opus_int Order, /* I
Max lag for correlation */ |
| 241 silk_float *Xt /* O
X'*t correlation vector [order] */ |
| 242 ); |
| 243 |
| 244 /* Add noise to matrix diagonal */ |
| 245 void silk_regularize_correlations_FLP( |
| 246 silk_float *XX, /* I/O
Correlation matrices */ |
| 247 silk_float *xx, /* I/O
Correlation values */ |
| 248 const silk_float noise, /* I
Noise energy to add */ |
| 249 const opus_int D /* I
Dimension of XX */ |
| 250 ); |
| 251 |
| 252 /* Function to solve linear equation Ax = b, where A is an MxM symmetric matrix
*/ |
| 253 void silk_solve_LDL_FLP( |
| 254 silk_float *A, /* I/O
Symmetric square matrix, out: reg. */ |
| 255 const opus_int M, /* I
Size of matrix */ |
| 256 const silk_float *b, /* I
Pointer to b vector */ |
| 257 silk_float *x /* O
Pointer to x solution vector */ |
| 258 ); |
| 259 |
| 260 /* Apply sine window to signal vector. */ |
| 261 /* Window types: */ |
| 262 /* 1 -> sine window from 0 to pi/2 */ |
| 263 /* 2 -> sine window from pi/2 to pi */ |
| 264 void silk_apply_sine_window_FLP( |
| 265 silk_float px_win[], /* O
Pointer to windowed signal */ |
| 266 const silk_float px[], /* I
Pointer to input signal */ |
| 267 const opus_int win_type, /* I
Selects a window type */ |
| 268 const opus_int length /* I
Window length, multiple of 4 */ |
| 269 ); |
| 270 |
| 271 /* Wrapper functions. Call flp / fix code */ |
| 272 |
| 273 /* Convert AR filter coefficients to NLSF parameters */ |
| 274 void silk_A2NLSF_FLP( |
| 275 opus_int16 *NLSF_Q15, /* O
NLSF vector [ LPC_order ] */ |
| 276 const silk_float *pAR, /* I
LPC coefficients [ LPC_order ] */ |
| 277 const opus_int LPC_order /* I
LPC order */ |
| 278 ); |
| 279 |
| 280 /* Convert NLSF parameters to AR prediction filter coefficients */ |
| 281 void silk_NLSF2A_FLP( |
| 282 silk_float *pAR, /* O
LPC coefficients [ LPC_order ] */ |
| 283 const opus_int16 *NLSF_Q15, /* I
NLSF vector [ LPC_order ] */ |
| 284 const opus_int LPC_order /* I
LPC order */ |
| 285 ); |
| 286 |
| 287 /* Limit, stabilize, and quantize NLSFs */ |
| 288 void silk_process_NLSFs_FLP( |
| 289 silk_encoder_state *psEncC, /* I/O
Encoder state */ |
| 290 silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O
Prediction coefficients */ |
| 291 opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O
Normalized LSFs (quant out) (0 - (2^15-1)) */ |
| 292 const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I
Previous Normalized LSFs (0 - (2^15-1)) */ |
| 293 ); |
| 294 |
| 295 /* Floating-point Silk NSQ wrapper */ |
| 296 void silk_NSQ_wrapper_FLP( |
| 297 silk_encoder_state_FLP *psEnc, /* I/O
Encoder state FLP */ |
| 298 silk_encoder_control_FLP *psEncCtrl, /* I/O
Encoder control FLP */ |
| 299 SideInfoIndices *psIndices, /* I/O
Quantization indices */ |
| 300 silk_nsq_state *psNSQ, /* I/O
Noise Shaping Quantzation state */ |
| 301 opus_int8 pulses[], /* O
Quantized pulse signal */ |
| 302 const silk_float x[] /* I
Prefiltered input signal */ |
| 303 ); |
| 304 |
| 305 #ifdef __cplusplus |
| 306 } |
| 307 #endif |
| 308 |
| 309 #endif |
| OLD | NEW |
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Chromium Code Reviews
Issue 11196031:
Add copy of opus library in deps/third_party. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/