0101d2969fa53bc7983696aa3223d84fe137e399
[opus.git] / silk / fixed / main_FIX.h
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:
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7 this list of conditions and the following disclaimer.
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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
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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
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19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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25 POSSIBILITY OF SUCH DAMAGE.
26 ***********************************************************************/
27
28 #ifndef SILK_MAIN_FIX_H
29 #define SILK_MAIN_FIX_H
30
31 #include "SigProc_FIX.h"
32 #include "structs_FIX.h"
33 #include "control.h"
34 #include "main.h"
35 #include "PLC.h"
36 #include "debug.h"
37 #include "entenc.h"
38
39 #ifndef FORCE_CPP_BUILD
40 #ifdef __cplusplus
41 extern "C"
42 {
43 #endif
44 #endif
45
46 #define silk_encoder_state_Fxx      silk_encoder_state_FIX
47 #define silk_encode_do_VAD_Fxx      silk_encode_do_VAD_FIX
48 #define silk_encode_frame_Fxx       silk_encode_frame_FIX
49
50 /*********************/
51 /* Encoder Functions */
52 /*********************/
53
54 /* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
55 void silk_HP_variable_cutoff(
56     silk_encoder_state_Fxx          state_Fxx[]                             /* I/O  Encoder states                                                              */
57 );
58
59 /* Encoder main function */
60 void silk_encode_do_VAD_FIX(
61     silk_encoder_state_FIX          *psEnc                                  /* I/O  Pointer to Silk FIX encoder state                                           */
62 );
63
64 /* Encoder main function */
65 opus_int silk_encode_frame_FIX(
66     silk_encoder_state_FIX          *psEnc,                                 /* I/O  Pointer to Silk FIX encoder state                                           */
67     opus_int32                      *pnBytesOut,                            /* O    Pointer to number of payload bytes;                                         */
68     ec_enc                          *psRangeEnc,                            /* I/O  compressor data structure                                                   */
69     opus_int                        condCoding,                             /* I    The type of conditional coding to use                                       */
70     opus_int                        maxBits,                                /* I    If > 0: maximum number of output bits                                       */
71     opus_int                        useCBR                                  /* I    Flag to force constant-bitrate operation                                    */
72 );
73
74 /* Initializes the Silk encoder state */
75 opus_int silk_init_encoder(
76     silk_encoder_state_Fxx          *psEnc,                                 /* I/O  Pointer to Silk FIX encoder state                                           */
77     int                              arch                                   /* I    Run-time architecture                                                       */
78 );
79
80 /* Control the Silk encoder */
81 opus_int silk_control_encoder(
82     silk_encoder_state_Fxx          *psEnc,                                 /* I/O  Pointer to Silk encoder state                                               */
83     silk_EncControlStruct           *encControl,                            /* I    Control structure                                                           */
84     const opus_int32                TargetRate_bps,                         /* I    Target max bitrate (bps)                                                    */
85     const opus_int                  allow_bw_switch,                        /* I    Flag to allow switching audio bandwidth                                     */
86     const opus_int                  channelNb,                              /* I    Channel number                                                              */
87     const opus_int                  force_fs_kHz
88 );
89
90 /****************/
91 /* Prefiltering */
92 /****************/
93 void silk_prefilter_FIX(
94     silk_encoder_state_FIX          *psEnc,                                 /* I/O  Encoder state                                                               */
95     const silk_encoder_control_FIX  *psEncCtrl,                             /* I    Encoder control                                                             */
96     opus_int32                      xw_Q10[],                               /* O    Weighted signal                                                             */
97     const opus_int16                x[]                                     /* I    Speech signal                                                               */
98 );
99
100 void silk_warped_LPC_analysis_filter_FIX_c(
101           opus_int32            state[],                    /* I/O  State [order + 1]                   */
102           opus_int32            res_Q2[],                   /* O    Residual signal [length]            */
103     const opus_int16            coef_Q13[],                 /* I    Coefficients [order]                */
104     const opus_int16            input[],                    /* I    Input signal [length]               */
105     const opus_int16            lambda_Q16,                 /* I    Warping factor                      */
106     const opus_int              length,                     /* I    Length of input signal              */
107     const opus_int              order                       /* I    Filter order (even)                 */
108 );
109
110
111 /**************************/
112 /* Noise shaping analysis */
113 /**************************/
114 /* Compute noise shaping coefficients and initial gain values */
115 void silk_noise_shape_analysis_FIX(
116     silk_encoder_state_FIX          *psEnc,                                 /* I/O  Encoder state FIX                                                           */
117     silk_encoder_control_FIX        *psEncCtrl,                             /* I/O  Encoder control FIX                                                         */
118     const opus_int16                *pitch_res,                             /* I    LPC residual from pitch analysis                                            */
119     const opus_int16                *x,                                     /* I    Input signal [ frame_length + la_shape ]                                    */
120     int                              arch                                   /* I    Run-time architecture                                                       */
121 );
122
123 /* Autocorrelations for a warped frequency axis */
124 void silk_warped_autocorrelation_FIX(
125           opus_int32                *corr,                                  /* O    Result [order + 1]                                                          */
126           opus_int                  *scale,                                 /* O    Scaling of the correlation vector                                           */
127     const opus_int16                *input,                                 /* I    Input data to correlate                                                     */
128     const opus_int                  warping_Q16,                            /* I    Warping coefficient                                                         */
129     const opus_int                  length,                                 /* I    Length of input                                                             */
130     const opus_int                  order                                   /* I    Correlation order (even)                                                    */
131 );
132
133 /* Calculation of LTP state scaling */
134 void silk_LTP_scale_ctrl_FIX(
135     silk_encoder_state_FIX          *psEnc,                                 /* I/O  encoder state                                                               */
136     silk_encoder_control_FIX        *psEncCtrl,                             /* I/O  encoder control                                                             */
137     opus_int                        condCoding                              /* I    The type of conditional coding to use                                       */
138 );
139
140 /**********************************************/
141 /* Prediction Analysis                        */
142 /**********************************************/
143 /* Find pitch lags */
144 void silk_find_pitch_lags_FIX(
145     silk_encoder_state_FIX          *psEnc,                                 /* I/O  encoder state                                                               */
146     silk_encoder_control_FIX        *psEncCtrl,                             /* I/O  encoder control                                                             */
147     opus_int16                      res[],                                  /* O    residual                                                                    */
148     const opus_int16                x[],                                    /* I    Speech signal                                                               */
149     int                             arch                                    /* I    Run-time architecture                                                       */
150 );
151
152 /* Find LPC and LTP coefficients */
153 void silk_find_pred_coefs_FIX(
154     silk_encoder_state_FIX          *psEnc,                                 /* I/O  encoder state                                                               */
155     silk_encoder_control_FIX        *psEncCtrl,                             /* I/O  encoder control                                                             */
156     const opus_int16                res_pitch[],                            /* I    Residual from pitch analysis                                                */
157     const opus_int16                x[],                                    /* I    Speech signal                                                               */
158     opus_int                        condCoding                              /* I    The type of conditional coding to use                                       */
159 );
160
161 /* LPC analysis */
162 void silk_find_LPC_FIX(
163     silk_encoder_state              *psEncC,                                /* I/O  Encoder state                                                               */
164     opus_int16                      NLSF_Q15[],                             /* O    NLSFs                                                                       */
165     const opus_int16                x[],                                    /* I    Input signal                                                                */
166     const opus_int32                minInvGain_Q30                          /* I    Inverse of max prediction gain                                              */
167 );
168
169 /* LTP analysis */
170 void silk_find_LTP_FIX(
171     opus_int32                      XXLTP_Q17[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O    Correlation matrix                                                                                               */
172     opus_int32                      xXLTP_Q17[ MAX_NB_SUBFR * LTP_ORDER ],      /* O    Correlation vector                                                                                                                      */
173     const opus_int16                r_lpc[],                                /* I    Residual signal after LPC                                                                               */
174     const opus_int                  lag[ MAX_NB_SUBFR ],                    /* I    LTP lags                                                                    */
175     const opus_int                  subfr_length,                           /* I    Subframe length                                                             */
176     const opus_int                  nb_subfr,                               /* I    Number of subframes                                                         */
177     int                             arch                                    /* I    Run-time architecture                                                       */
178 );
179
180 void silk_LTP_analysis_filter_FIX(
181     opus_int16                      *LTP_res,                               /* O    LTP residual signal of length MAX_NB_SUBFR * ( pre_length + subfr_length )  */
182     const opus_int16                *x,                                     /* I    Pointer to input signal with at least max( pitchL ) preceding samples       */
183     const opus_int16                LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],/* I    LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe                   */
184     const opus_int                  pitchL[ MAX_NB_SUBFR ],                 /* I    Pitch lag, one for each subframe                                            */
185     const opus_int32                invGains_Q16[ MAX_NB_SUBFR ],           /* I    Inverse quantization gains, one for each subframe                           */
186     const opus_int                  subfr_length,                           /* I    Length of each subframe                                                     */
187     const opus_int                  nb_subfr,                               /* I    Number of subframes                                                         */
188     const opus_int                  pre_length                              /* I    Length of the preceding samples starting at &x[0] for each subframe         */
189 );
190
191 /* Calculates residual energies of input subframes where all subframes have LPC_order   */
192 /* of preceding samples                                                                 */
193 void silk_residual_energy_FIX(
194           opus_int32                nrgs[ MAX_NB_SUBFR ],                   /* O    Residual energy per subframe                                                */
195           opus_int                  nrgsQ[ MAX_NB_SUBFR ],                  /* O    Q value per subframe                                                        */
196     const opus_int16                x[],                                    /* I    Input signal                                                                */
197           opus_int16                a_Q12[ 2 ][ MAX_LPC_ORDER ],            /* I    AR coefs for each frame half                                                */
198     const opus_int32                gains[ MAX_NB_SUBFR ],                  /* I    Quantization gains                                                          */
199     const opus_int                  subfr_length,                           /* I    Subframe length                                                             */
200     const opus_int                  nb_subfr,                               /* I    Number of subframes                                                         */
201     const opus_int                  LPC_order,                              /* I    LPC order                                                                   */
202     int                             arch                                    /* I    Run-time architecture                                                       */
203 );
204
205 /* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
206 opus_int32 silk_residual_energy16_covar_FIX(
207     const opus_int16                *c,                                     /* I    Prediction vector                                                           */
208     const opus_int32                *wXX,                                   /* I    Correlation matrix                                                          */
209     const opus_int32                *wXx,                                   /* I    Correlation vector                                                          */
210     opus_int32                      wxx,                                    /* I    Signal energy                                                               */
211     opus_int                        D,                                      /* I    Dimension                                                                   */
212     opus_int                        cQ                                      /* I    Q value for c vector 0 - 15                                                 */
213 );
214
215 /* Processing of gains */
216 void silk_process_gains_FIX(
217     silk_encoder_state_FIX          *psEnc,                                 /* I/O  Encoder state                                                               */
218     silk_encoder_control_FIX        *psEncCtrl,                             /* I/O  Encoder control                                                             */
219     opus_int                        condCoding                              /* I    The type of conditional coding to use                                       */
220 );
221
222 /******************/
223 /* Linear Algebra */
224 /******************/
225 /* Calculates correlation matrix X'*X */
226 void silk_corrMatrix_FIX(
227     const opus_int16                *x,                                     /* I    x vector [L + order - 1] used to form data matrix X                         */
228     const opus_int                  L,                                      /* I    Length of vectors                                                           */
229     const opus_int                  order,                                  /* I    Max lag for correlation                                                     */
230     opus_int32                      *XX,                                    /* O    Pointer to X'*X correlation matrix [ order x order ]                        */
231         opus_int32                      *nrg,                                                                   /* O    Energy of x vector                                                                                                                      */
232     opus_int                        *rshifts,                               /* O    Right shifts of correlations                                                */
233     int                              arch                                   /* I    Run-time architecture                                                       */
234 );
235
236 /* Calculates correlation vector X'*t */
237 void silk_corrVector_FIX(
238     const opus_int16                *x,                                     /* I    x vector [L + order - 1] used to form data matrix X                         */
239     const opus_int16                *t,                                     /* I    Target vector [L]                                                           */
240     const opus_int                  L,                                      /* I    Length of vectors                                                           */
241     const opus_int                  order,                                  /* I    Max lag for correlation                                                     */
242     opus_int32                      *Xt,                                    /* O    Pointer to X'*t correlation vector [order]                                  */
243     const opus_int                  rshifts,                                /* I    Right shifts of correlations                                                */
244     int                             arch                                    /* I    Run-time architecture                                                       */
245 );
246
247 #ifndef FORCE_CPP_BUILD
248 #ifdef __cplusplus
249 }
250 #endif /* __cplusplus */
251 #endif /* FORCE_CPP_BUILD */
252 #endif /* SILK_MAIN_FIX_H */