1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
|
/***********************************************************************
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) */
int arch
);
/* 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 */
int arch
);
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] */
int arch
);
/* 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] */
int arch
);
/* 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
|
