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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/float/main_FLP.h')
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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 statistics */ | ||
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 | opus_int activity /* I Decision of Opus voice activity detector */ | ||
61 | ); | ||
62 | |||
63 | /* Encoder main function */ | ||
64 | opus_int silk_encode_frame_FLP( | ||
65 | silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ | ||
66 | opus_int32 *pnBytesOut, /* O Number of payload bytes; */ | ||
67 | ec_enc *psRangeEnc, /* I/O compressor data structure */ | ||
68 | opus_int condCoding, /* I The type of conditional coding to use */ | ||
69 | opus_int maxBits, /* I If > 0: maximum number of output bits */ | ||
70 | opus_int useCBR /* I Flag to force constant-bitrate operation */ | ||
71 | ); | ||
72 | |||
73 | /* Initializes the Silk encoder state */ | ||
74 | opus_int silk_init_encoder( | ||
75 | silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ | ||
76 | int arch /* I Run-tim architecture */ | ||
77 | ); | ||
78 | |||
79 | /* Control the Silk encoder */ | ||
80 | opus_int silk_control_encoder( | ||
81 | silk_encoder_state_FLP *psEnc, /* I/O Pointer to Silk encoder state FLP */ | ||
82 | silk_EncControlStruct *encControl, /* I Control structure */ | ||
83 | const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */ | ||
84 | const opus_int channelNb, /* I Channel number */ | ||
85 | const opus_int force_fs_kHz | ||
86 | ); | ||
87 | |||
88 | /**************************/ | ||
89 | /* Noise shaping analysis */ | ||
90 | /**************************/ | ||
91 | /* Compute noise shaping coefficients and initial gain values */ | ||
92 | void silk_noise_shape_analysis_FLP( | ||
93 | silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ | ||
94 | silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ | ||
95 | const silk_float *pitch_res, /* I LPC residual from pitch analysis */ | ||
96 | const silk_float *x /* I Input signal [frame_length + la_shape] */ | ||
97 | ); | ||
98 | |||
99 | /* Autocorrelations for a warped frequency axis */ | ||
100 | void silk_warped_autocorrelation_FLP( | ||
101 | silk_float *corr, /* O Result [order + 1] */ | ||
102 | const silk_float *input, /* I Input data to correlate */ | ||
103 | const silk_float warping, /* I Warping coefficient */ | ||
104 | const opus_int length, /* I Length of input */ | ||
105 | const opus_int order /* I Correlation order (even) */ | ||
106 | ); | ||
107 | |||
108 | /* Calculation of LTP state scaling */ | ||
109 | void silk_LTP_scale_ctrl_FLP( | ||
110 | silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ | ||
111 | silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ | ||
112 | opus_int condCoding /* I The type of conditional coding to use */ | ||
113 | ); | ||
114 | |||
115 | /**********************************************/ | ||
116 | /* Prediction Analysis */ | ||
117 | /**********************************************/ | ||
118 | /* Find pitch lags */ | ||
119 | void silk_find_pitch_lags_FLP( | ||
120 | silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ | ||
121 | silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ | ||
122 | silk_float res[], /* O Residual */ | ||
123 | const silk_float x[], /* I Speech signal */ | ||
124 | int arch /* I Run-time architecture */ | ||
125 | ); | ||
126 | |||
127 | /* Find LPC and LTP coefficients */ | ||
128 | void silk_find_pred_coefs_FLP( | ||
129 | silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ | ||
130 | silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ | ||
131 | const silk_float res_pitch[], /* I Residual from pitch analysis */ | ||
132 | const silk_float x[], /* I Speech signal */ | ||
133 | opus_int condCoding /* I The type of conditional coding to use */ | ||
134 | ); | ||
135 | |||
136 | /* LPC analysis */ | ||
137 | void silk_find_LPC_FLP( | ||
138 | silk_encoder_state *psEncC, /* I/O Encoder state */ | ||
139 | opus_int16 NLSF_Q15[], /* O NLSFs */ | ||
140 | const silk_float x[], /* I Input signal */ | ||
141 | const silk_float minInvGain /* I Prediction gain from LTP (dB) */ | ||
142 | ); | ||
143 | |||
144 | /* LTP analysis */ | ||
145 | void silk_find_LTP_FLP( | ||
146 | silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */ | ||
147 | silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* O Weight for LTP quantization */ | ||
148 | const silk_float r_ptr[], /* I LPC residual */ | ||
149 | const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */ | ||
150 | const opus_int subfr_length, /* I Subframe length */ | ||
151 | const opus_int nb_subfr /* I number of subframes */ | ||
152 | ); | ||
153 | |||
154 | void silk_LTP_analysis_filter_FLP( | ||
155 | silk_float *LTP_res, /* O LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */ | ||
156 | const silk_float *x, /* I Input signal, with preceding samples */ | ||
157 | const silk_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I LTP coefficients for each subframe */ | ||
158 | const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ | ||
159 | const silk_float invGains[ MAX_NB_SUBFR ], /* I Inverse quantization gains */ | ||
160 | const opus_int subfr_length, /* I Length of each subframe */ | ||
161 | const opus_int nb_subfr, /* I number of subframes */ | ||
162 | const opus_int pre_length /* I Preceding samples for each subframe */ | ||
163 | ); | ||
164 | |||
165 | /* Calculates residual energies of input subframes where all subframes have LPC_order */ | ||
166 | /* of preceding samples */ | ||
167 | void silk_residual_energy_FLP( | ||
168 | silk_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */ | ||
169 | const silk_float x[], /* I Input signal */ | ||
170 | silk_float a[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */ | ||
171 | const silk_float gains[], /* I Quantization gains */ | ||
172 | const opus_int subfr_length, /* I Subframe length */ | ||
173 | const opus_int nb_subfr, /* I number of subframes */ | ||
174 | const opus_int LPC_order /* I LPC order */ | ||
175 | ); | ||
176 | |||
177 | /* 16th order LPC analysis filter */ | ||
178 | void silk_LPC_analysis_filter_FLP( | ||
179 | silk_float r_LPC[], /* O LPC residual signal */ | ||
180 | const silk_float PredCoef[], /* I LPC coefficients */ | ||
181 | const silk_float s[], /* I Input signal */ | ||
182 | const opus_int length, /* I Length of input signal */ | ||
183 | const opus_int Order /* I LPC order */ | ||
184 | ); | ||
185 | |||
186 | /* LTP tap quantizer */ | ||
187 | void silk_quant_LTP_gains_FLP( | ||
188 | silk_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* O Quantized LTP gains */ | ||
189 | opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */ | ||
190 | opus_int8 *periodicity_index, /* O Periodicity index */ | ||
191 | opus_int32 *sum_log_gain_Q7, /* I/O Cumulative max prediction gain */ | ||
192 | silk_float *pred_gain_dB, /* O LTP prediction gain */ | ||
193 | const silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Correlation matrix */ | ||
194 | const silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* I Correlation vector */ | ||
195 | const opus_int subfr_len, /* I Number of samples per subframe */ | ||
196 | const opus_int nb_subfr, /* I Number of subframes */ | ||
197 | int arch /* I Run-time architecture */ | ||
198 | ); | ||
199 | |||
200 | /* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */ | ||
201 | silk_float silk_residual_energy_covar_FLP( /* O Weighted residual energy */ | ||
202 | const silk_float *c, /* I Filter coefficients */ | ||
203 | silk_float *wXX, /* I/O Weighted correlation matrix, reg. out */ | ||
204 | const silk_float *wXx, /* I Weighted correlation vector */ | ||
205 | const silk_float wxx, /* I Weighted correlation value */ | ||
206 | const opus_int D /* I Dimension */ | ||
207 | ); | ||
208 | |||
209 | /* Processing of gains */ | ||
210 | void silk_process_gains_FLP( | ||
211 | silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ | ||
212 | silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ | ||
213 | opus_int condCoding /* I The type of conditional coding to use */ | ||
214 | ); | ||
215 | |||
216 | /******************/ | ||
217 | /* Linear Algebra */ | ||
218 | /******************/ | ||
219 | /* Calculates correlation matrix X'*X */ | ||
220 | void silk_corrMatrix_FLP( | ||
221 | const silk_float *x, /* I x vector [ L+order-1 ] used to create X */ | ||
222 | const opus_int L, /* I Length of vectors */ | ||
223 | const opus_int Order, /* I Max lag for correlation */ | ||
224 | silk_float *XX /* O X'*X correlation matrix [order x order] */ | ||
225 | ); | ||
226 | |||
227 | /* Calculates correlation vector X'*t */ | ||
228 | void silk_corrVector_FLP( | ||
229 | const silk_float *x, /* I x vector [L+order-1] used to create X */ | ||
230 | const silk_float *t, /* I Target vector [L] */ | ||
231 | const opus_int L, /* I Length of vecors */ | ||
232 | const opus_int Order, /* I Max lag for correlation */ | ||
233 | silk_float *Xt /* O X'*t correlation vector [order] */ | ||
234 | ); | ||
235 | |||
236 | /* Apply sine window to signal vector. */ | ||
237 | /* Window types: */ | ||
238 | /* 1 -> sine window from 0 to pi/2 */ | ||
239 | /* 2 -> sine window from pi/2 to pi */ | ||
240 | void silk_apply_sine_window_FLP( | ||
241 | silk_float px_win[], /* O Pointer to windowed signal */ | ||
242 | const silk_float px[], /* I Pointer to input signal */ | ||
243 | const opus_int win_type, /* I Selects a window type */ | ||
244 | const opus_int length /* I Window length, multiple of 4 */ | ||
245 | ); | ||
246 | |||
247 | /* Wrapper functions. Call flp / fix code */ | ||
248 | |||
249 | /* Convert AR filter coefficients to NLSF parameters */ | ||
250 | void silk_A2NLSF_FLP( | ||
251 | opus_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */ | ||
252 | const silk_float *pAR, /* I LPC coefficients [ LPC_order ] */ | ||
253 | const opus_int LPC_order /* I LPC order */ | ||
254 | ); | ||
255 | |||
256 | /* Convert NLSF parameters to AR prediction filter coefficients */ | ||
257 | void silk_NLSF2A_FLP( | ||
258 | silk_float *pAR, /* O LPC coefficients [ LPC_order ] */ | ||
259 | const opus_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */ | ||
260 | const opus_int LPC_order, /* I LPC order */ | ||
261 | int arch /* I Run-time architecture */ | ||
262 | ); | ||
263 | |||
264 | /* Limit, stabilize, and quantize NLSFs */ | ||
265 | void silk_process_NLSFs_FLP( | ||
266 | silk_encoder_state *psEncC, /* I/O Encoder state */ | ||
267 | silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */ | ||
268 | opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */ | ||
269 | const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */ | ||
270 | ); | ||
271 | |||
272 | /* Floating-point Silk NSQ wrapper */ | ||
273 | void silk_NSQ_wrapper_FLP( | ||
274 | silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ | ||
275 | silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ | ||
276 | SideInfoIndices *psIndices, /* I/O Quantization indices */ | ||
277 | silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */ | ||
278 | opus_int8 pulses[], /* O Quantized pulse signal */ | ||
279 | const silk_float x[] /* I Prefiltered input signal */ | ||
280 | ); | ||
281 | |||
282 | #ifdef __cplusplus | ||
283 | } | ||
284 | #endif | ||
285 | |||
286 | #endif | ||