##// END OF EJS Templates
Local Sync
paul -
r8:b0a4fa20a3c7 default
parent child
Show More
This diff has been collapsed as it changes many lines, (831 lines changed) Show them Hide them
@@ -4,47 +4,6
4 // version 1.2: 30/04/2014
4 // version 1.2: 30/04/2014
5
5
6 #include "basic_parameters.h"
6 #include "basic_parameters.h"
7 #include <math.h>
8 #include <stdio.h>
9 #include <stdint.h>
10
11 #define K44_PE 0
12 #define K55_PE 1
13 #define K45_PE_RE 2
14 #define K45_PE_IM 3
15
16 #define K14_SX_RE 4
17 #define K14_SX_IM 5
18 #define K15_SX_RE 6
19 #define K15_SX_IM 7
20 #define K24_SX_RE 8
21 #define K24_SX_IM 9
22 #define K25_SX_RE 10
23 #define K25_SX_IM 11
24 #define K34_SX_RE 12
25 #define K34_SX_IM 13
26 #define K35_SX_RE 14
27 #define K35_SX_IM 15
28
29 #define K24_NY_RE 16
30 #define K24_NY_IM 17
31 #define K25_NY_RE 18
32 #define K25_NY_IM 19
33 #define K34_NY_RE 20
34 #define K34_NY_IM 21
35 #define K35_NY_RE 22
36 #define K35_NY_IM 23
37
38 #define K24_NZ_RE 24
39 #define K24_NZ_IM 25
40 #define K25_NZ_RE 26
41 #define K25_NZ_IM 27
42 #define K34_NZ_RE 28
43 #define K34_NZ_IM 29
44 #define K35_NZ_RE 30
45 #define K35_NZ_IM 31
46
47 float k_f0[NB_BINS_COMPRESSED_MATRIX_f0][32];
48
7
49 void init_k_f0( void )
8 void init_k_f0( void )
50 {
9 {
@@ -89,793 +48,3 void init_k_f0( void )
89 }
48 }
90 }
49 }
91
50
92 float alpha_M = 45 * (3.1415927/180);
93
94 void BP1_set( float * compressed_spec_mat, uint8_t nb_bins_compressed_spec_mat, uint8_t * lfr_bp1 ){
95 int exponent; // 32 bits signed
96 float PSDB; // 32 bits floating point
97 float PSDE;
98 float tmp;
99 float NVEC_V0;
100 float NVEC_V1;
101 float NVEC_V2;
102 float aux;
103 float tr_SB_SB;
104 float e_cross_b_re;
105 float e_cross_b_im;
106 float n_cross_e_scal_b_re;
107 float n_cross_e_scal_b_im;
108 float ny;
109 float nz;
110 float bx_bx_star;
111 float vphi;
112 float significand;
113 uint8_t nbitexp; // 8 bits unsigned
114 uint8_t nbitsig;
115 uint8_t tmp_uint8;
116 uint8_t *pt_uint8; // pointer on unsigned 8-bit bytes
117 int8_t expmin; // 8 bits signed
118 int8_t expmax;
119 int16_t rangesig; // 16 bits unsigned
120 uint16_t psd;
121 uint16_t exp;
122 uint16_t tmp_uint16;
123 uint16_t i;
124
125 init_k_f0();
126
127 #ifdef DEBUG_TCH
128 printf("BP1 : \n");
129 printf("Number of bins: %d\n", nb_bins_compressed_spec_mat);
130 #endif
131
132 // initialization for managing the exponents of the floating point data:
133 nbitexp = 5; // number of bits for the exponent
134 expmax = 30; // maximum value of the exponent
135 expmin = expmax - (1 << nbitexp) + 1; // accordingly the minimum exponent value
136 // for floating point data to be recorded on 12-bit words:
137 nbitsig = 12 - nbitexp; // number of bits for the significand
138 rangesig = (1 << nbitsig)-1; // == 2^nbitsig - 1
139
140 #ifdef DEBUG_TCH
141 printf("nbitexp : %d, expmax : %d, expmin : %d\n", nbitexp, expmax, expmin);
142 printf("nbitsig : %d, rangesig : %d\n", nbitsig, rangesig);
143 #endif
144
145 for(i=0; i<nb_bins_compressed_spec_mat; i++){
146 //==============================================
147 // BP1 PSDB == PA_LFR_SC_BP1_PB_F0 == 12 bits = 5 bits (exponent) + 7 bits (significand)
148 PSDB = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX] // S11
149 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9] // S22
150 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+16]; // S33
151
152 significand = frexpf(PSDB/3, &exponent); // 0.5 <= significand < 1
153 // PSDB/3 = significand * 2^exponent
154 // the division by 3 is to ensure that max value <= 2^30
155
156 if (exponent < expmin) { // value should be >= 0.5 * 2^expmin
157 exponent = expmin;
158 significand = 0.5; // min value that can be recorded
159 }
160 if (exponent > expmax) { // value should be < 0.5 * 2^(expmax+1)
161 exponent = expmax;
162 significand = 1.0; // max value that can be recorded
163 }
164 if (significand == 0) {// in that case exponent == 0 too
165 exponent = expmin;
166 significand = 0.5; // min value that can be recorded
167 }
168
169 psd = (uint16_t) ((significand*2-1)*rangesig + 0.5); // Shift and cast into a 16-bit unsigned int with rounding
170 // where just the first nbitsig bits are used (0, ..., 2^nbitsig-1)
171 exp = (uint16_t) (exponent-expmin); // Shift and cast into a 16-bit unsigned int where just
172 // the first nbitexp bits are used (0, ..., 2^nbitexp-1)
173 tmp_uint16 = psd | (exp << nbitsig); // Put the exponent bits (nbitexp) next to the
174 // left place of the significand bits (nbitsig),
175 // making the 16-bit word to be recorded
176 pt_uint8 = (uint8_t*) &tmp_uint16; // Affect an uint8_t pointer with the adress of tmp_uint16
177 #ifdef LSB_FIRST_TCH
178 lfr_bp1[i*NB_BYTES_BP1+2] = pt_uint8[0]; // Record LSB of tmp_uint16
179 lfr_bp1[i*NB_BYTES_BP1+3] = pt_uint8[1]; // Record MSB of tmp_uint16
180 #endif
181 #ifdef MSB_FIRST_TCH
182 lfr_bp1[i*NB_BYTES_BP1+2] = pt_uint8[1]; // Record LSB of tmp_uint16
183 lfr_bp1[i*NB_BYTES_BP1+3] = pt_uint8[0]; // Record MSB of tmp_uint16
184 #endif
185 #ifdef DEBUG_TCH
186 printf("\nBin number: %d\n", i);
187 printf("PSDB / 3 : %16.8e\n",PSDB/3);
188 printf("significand : %16.8e\n",significand);
189 printf("exponent : %d\n" ,exponent);
190 printf("psd for PSDB significand : %d\n",psd);
191 printf("exp for PSDB exponent : %d\n",exp);
192 printf("pt_uint8[1] for PSDB exponent + significand: %.3d or %.2x\n",pt_uint8[1], pt_uint8[1]);
193 printf("pt_uint8[0] for PSDB exponent + significand: %.3d or %.2x\n",pt_uint8[0], pt_uint8[0]);
194 printf("lfr_bp1[i*NB_BYTES_BP1+3] : %.3d or %.2x\n",lfr_bp1[i*NB_BYTES_BP1+3], lfr_bp1[i*NB_BYTES_BP1+3]);
195 printf("lfr_bp1[i*NB_BYTES_BP1+2] : %.3d or %.2x\n",lfr_bp1[i*NB_BYTES_BP1+2], lfr_bp1[i*NB_BYTES_BP1+2]);
196 #endif
197 //==============================================
198 // BP1 PSDE == PA_LFR_SC_BP1_PE_F0 == 12 bits = 5 bits (exponent) + 7 bits (significand)
199 PSDE = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+21] * k_f0[i][K44_PE] // S44
200 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+24] * k_f0[i][K55_PE] // S55
201 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+22] * k_f0[i][K45_PE_RE] // S45 Re
202 - compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+23] * k_f0[i][K45_PE_IM]; // S45 Im
203
204 significand = frexpf(PSDE/2, &exponent); // 0.5 <= significand < 1
205 // PSDE/2 = significand * 2^exponent
206 // the division by 2 is to ensure that max value <= 2^30
207 // should be reconsidered by taking into account the k-coefficients ...
208
209 if (exponent < expmin) { // value should be >= 0.5 * 2^expmin
210 exponent = expmin;
211 significand = 0.5; // min value that can be recorded
212 }
213 if (exponent > expmax) { // value should be < 0.5 * 2^(expmax+1)
214 exponent = expmax;
215 significand = 1.0; // max value that can be recorded
216 }
217 if (significand == 0) {// in that case exponent == 0 too
218 exponent = expmin;
219 significand = 0.5; // min value that can be recorded
220 }
221
222 psd = (uint16_t) ((significand*2-1)*rangesig + 0.5); // Shift and cast into a 16-bit unsigned int with rounding
223 // where just the first nbitsig bits are used (0, ..., 2^nbitsig-1)
224 exp = (uint16_t) (exponent-expmin); // Shift and cast into a 16-bit unsigned int where just
225 // the first nbitexp bits are used (0, ..., 2^nbitexp-1)
226 tmp_uint16 = psd | (exp << nbitsig); // Put the exponent bits (nbitexp) next to the
227 // left place of the significand bits (nbitsig),
228 // making the 16-bit word to be recorded
229 pt_uint8 = (uint8_t*) &tmp_uint16; // Affect an uint8_t pointer with the adress of tmp_uint16
230 #ifdef LSB_FIRST_TCH
231 lfr_bp1[i*NB_BYTES_BP1+0] = pt_uint8[0]; // Record LSB of tmp_uint16
232 lfr_bp1[i*NB_BYTES_BP1+1] = pt_uint8[1]; // Record MSB of tmp_uint16
233 #endif
234 #ifdef MSB_FIRST_TCH
235 lfr_bp1[i*NB_BYTES_BP1+0] = pt_uint8[1]; // Record LSB of tmp_uint16
236 lfr_bp1[i*NB_BYTES_BP1+1] = pt_uint8[0]; // Record MSB of tmp_uint16
237 #endif
238 #ifdef DEBUG_TCH
239 printf("Bin number: %d\n", i);
240 printf("PSDE/2 : %16.8e\n",PSDE/2);
241 printf("significand : %16.8e\n",significand);
242 printf("exponent : %d\n" ,exponent);
243 printf("psd for PSDE significand : %d\n",psd);
244 printf("exp for PSDE exponent : %d\n",exp);
245 printf("pt_uint8[1] for PSDE exponent + significand: %.3d or %.2x\n",pt_uint8[1], pt_uint8[1]);
246 printf("pt_uint8[0] for PSDE exponent + significand: %.3d or %.2x\n",pt_uint8[0], pt_uint8[0]);
247 printf("lfr_bp1[i*NB_BYTES_BP1+1] : %.3d or %.2x\n",lfr_bp1[i*NB_BYTES_BP1+1], lfr_bp1[i*NB_BYTES_BP1+1]);
248 printf("lfr_bp1[i*NB_BYTES_BP1+0] : %.3d or %.2x\n",lfr_bp1[i*NB_BYTES_BP1+0], lfr_bp1[i*NB_BYTES_BP1+0]);
249 #endif
250 //==============================================================================
251 // BP1 normal wave vector == PA_LFR_SC_BP1_NVEC_V0_F0 == 8 bits
252 // == PA_LFR_SC_BP1_NVEC_V1_F0 == 8 bits
253 // == PA_LFR_SC_BP1_NVEC_V2_F0 == 1 sign bit
254 tmp = sqrt( compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+2] *compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+2] //Im S12
255 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+4] *compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+4] //Im S13
256 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+11]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+11] //Im S23
257 );
258 NVEC_V0 = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+11]/ tmp; // S23 Im => n1
259 NVEC_V1 = -compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+4] / tmp; // S13 Im => n2
260 NVEC_V2 = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+2] / tmp; // S12 Im => n3
261
262 lfr_bp1[i*NB_BYTES_BP1+4] = (uint8_t) (NVEC_V0*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
263 lfr_bp1[i*NB_BYTES_BP1+5] = (uint8_t) (NVEC_V1*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
264 pt_uint8 = (uint8_t*) &NVEC_V2; // affect an uint8_t pointer with the adress of NVEC_V2
265 #ifdef LSB_FIRST_TCH
266 lfr_bp1[i*NB_BYTES_BP1+6] = pt_uint8[3] & 0x80; // extract the sign bit of NVEC_V2 (32-bit float, sign bit in the 4th octet:PC convention)
267 // record it at the 8th bit position (from the right to the left) of lfr_bp1[i*NB_BYTES_BP1+6]
268 #endif
269 #ifdef MSB_FIRST_TCH
270 lfr_bp1[i*NB_BYTES_BP1+6] = pt_uint8[0] & 0x80; // extract the sign bit of NVEC_V2 (32-bit float, sign bit in the 0th octet:SPARC convention)
271 // record it at the 8th bit position (from the right to the left) of lfr_bp1[i*NB_BYTES_BP1+6]
272 #endif
273 #ifdef DEBUG_TCH
274 printf("NVEC_V0 : %16.8e\n",NVEC_V0);
275 printf("NVEC_V1 : %16.8e\n",NVEC_V1);
276 printf("NVEC_V2 : %16.8e\n",NVEC_V2);
277 printf("lfr_bp1[i*NB_BYTES_BP1+4] for NVEC_V0 : %u\n",lfr_bp1[i*NB_BYTES_BP1+4]);
278 printf("lfr_bp1[i*NB_BYTES_BP1+5] for NVEC_V1 : %u\n",lfr_bp1[i*NB_BYTES_BP1+5]);
279 printf("lfr_bp1[i*NB_BYTES_BP1+6] for NVEC_V2 : %u\n",lfr_bp1[i*NB_BYTES_BP1+6]);
280 #endif
281 //=======================================================
282 // BP1 ellipticity == PA_LFR_SC_BP1_ELLIP_F0 == 4 bits
283 aux = 2*tmp / PSDB; // compute the ellipticity
284
285 tmp_uint8 = (uint8_t) (aux*15 + 0.5); // shift and cast into a 8-bit uint8_t with rounding
286 // where just the first 4 bits are used (0, ..., 15)
287 lfr_bp1[i*NB_BYTES_BP1+6] = lfr_bp1[i*NB_BYTES_BP1+6] | (tmp_uint8 << 3); // put these 4 bits next to the right place
288 // of the sign bit of NVEC_V2 (recorded
289 // previously in lfr_bp1[i*NB_BYTES_BP1+6])
290 #ifdef DEBUG_TCH
291 printf("ellipticity : %16.8e\n",aux);
292 printf("tmp_uint8 for ellipticity : %u\n",tmp_uint8);
293 printf("lfr_bp1[i*NB_BYTES_BP1+6] for NVEC_V2 + ellipticity : %u\n",lfr_bp1[i*NB_BYTES_BP1+6]);
294 #endif
295 //==============================================================
296 // BP1 degree of polarization == PA_LFR_SC_BP1_DOP_F0 == 3 bits
297 tr_SB_SB = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX] *compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX]
298 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9] *compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9]
299 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+16] *compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+16]
300 + 2 * compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+1] *compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+1]
301 + 2 * compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+2] *compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+2]
302 + 2 * compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+3] *compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+3]
303 + 2 * compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+4] *compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+4]
304 + 2 * compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+10]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+10]
305 + 2 * compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+11]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+11];
306 aux = PSDB*PSDB;
307 tmp = ( 3*tr_SB_SB - aux ) / ( 2 * aux ); // compute the degree of polarisation
308
309 tmp_uint8 = (uint8_t) (tmp*7 + 0.5);// shift and cast into a 8-bit uint8_t with rounding
310 // where just the first 3 bits are used (0, ..., 7)
311 lfr_bp1[i*NB_BYTES_BP1+6] = lfr_bp1[i*NB_BYTES_BP1+6] | tmp_uint8; // record these 3 bits at the 3 first bit positions
312 // (from the right to the left) of lfr_bp1[i*NB_BYTES_BP1+6]
313 #ifdef DEBUG_TCH
314 printf("DOP : %16.8e\n",tmp);
315 printf("tmp_uint8 for DOP : %u\n",tmp_uint8);
316 printf("lfr_bp1[i*NB_BYTES_BP1+6] for NVEC_V2 + ellipticity + DOP : %u\n",lfr_bp1[i*NB_BYTES_BP1+6]);
317 #endif
318 //=======================================================================================
319 // BP1 X_SO-component of the Poynting flux == PA_LFR_SC_BP1_SX_F0 == 8 (+ 2) bits
320 // = 5 bits (exponent) + 3 bits (significand)
321 // + 1 sign bit + 1 argument bit (two sectors)
322 e_cross_b_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+17]*k_f0[i][K34_SX_RE] //S34 Re
323 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+19]*k_f0[i][K35_SX_RE] //S35 Re
324 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+5] *k_f0[i][K14_SX_RE] //S14 Re
325 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+7] *k_f0[i][K15_SX_RE] //S15 Re
326 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+12]*k_f0[i][K24_SX_RE] //S24 Re
327 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+14]*k_f0[i][K25_SX_RE] //S25 Re
328 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+18]*k_f0[i][K34_SX_IM] //S34 Im
329 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+20]*k_f0[i][K35_SX_IM] //S35 Im
330 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+6] *k_f0[i][K14_SX_IM] //S14 Im
331 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+8] *k_f0[i][K15_SX_IM] //S15 Im
332 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+13]*k_f0[i][K24_SX_IM] //S24 Im
333 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+15]*k_f0[i][K25_SX_IM]; //S25 Im
334 // Im(S_ji) = -Im(S_ij)
335 // k_ji = k_ij
336 e_cross_b_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+17]*k_f0[i][K34_SX_IM] //S34 Re
337 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+19]*k_f0[i][K35_SX_IM] //S35 Re
338 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+5] *k_f0[i][K14_SX_IM] //S14 Re
339 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+7] *k_f0[i][K15_SX_IM] //S15 Re
340 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+12]*k_f0[i][K24_SX_IM] //S24 Re
341 + compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+14]*k_f0[i][K25_SX_IM] //S25 Re
342 - compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+18]*k_f0[i][K34_SX_RE] //S34 Im
343 - compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+20]*k_f0[i][K35_SX_RE] //S35 Im
344 - compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+6] *k_f0[i][K14_SX_RE] //S14 Im
345 - compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+8] *k_f0[i][K15_SX_RE] //S15 Im
346 - compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+13]*k_f0[i][K24_SX_RE] //S24 Im
347 - compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+15]*k_f0[i][K25_SX_RE]; //S25 Im
348 #ifdef DEBUG_TCH
349 printf("ReaSX / 2 : %16.8e\n",e_cross_b_re/2);
350 #endif
351 pt_uint8 = (uint8_t*) &e_cross_b_re; // Affect an uint8_t pointer with the adress of e_cross_b_re
352 #ifdef LSB_FIRST_TCH
353 lfr_bp1[i*NB_BYTES_BP1+1] = lfr_bp1[i*NB_BYTES_BP1+1] | (pt_uint8[3] & 0x80); // Extract its sign bit (32-bit float, sign bit in the 4th octet:PC convention)
354 // Record it at the 8th bit position (from the right to the left)
355 // of lfr_bp1[i*NB_BYTES_BP1+1]
356 pt_uint8[3] = (pt_uint8[3] & 0x7f); // Make e_cross_b_re be positive in any case: |ReaSX|
357 #endif
358 #ifdef MSB_FIRST_TCH
359 lfr_bp1[i*NB_BYTES_BP1+1] = lfr_bp1[i*NB_BYTES_BP1+1] | (pt_uint8[0] & 0x80); // Extract its sign bit (32-bit float, sign bit in the 0th octet:SPARC convention)
360 // Record it at the 8th bit position (from the right to the left)
361 // of lfr_bp1[i*NB_BYTES_BP1+1]
362 pt_uint8[0] = (pt_uint8[0] & 0x7f); // Make e_cross_b_re be positive in any case: |ReaSX|
363 #endif
364 significand = frexpf(e_cross_b_re/2, &exponent);// 0.5 <= significand < 1
365 // ReaSX/2 = significand * 2^exponent
366 // The division by 2 is to ensure that max value <= 2^30 (rough estimate)
367 // Should be reconsidered by taking into account the k-coefficients ...
368
369 if (exponent < expmin) { // value should be >= 0.5 * 2^expmin
370 exponent = expmin;
371 significand = 0.5; // min value that can be recorded
372 }
373 if (exponent > expmax) { // value should be < 0.5 * 2^(expmax+1)
374 exponent = expmax;
375 significand = 1.0; // max value that can be recorded
376 }
377 if (significand == 0) {// in that case exponent == 0 too
378 exponent = expmin;
379 significand = 0.5; // min value that can be recorded
380 }
381
382 lfr_bp1[i*NB_BYTES_BP1+7] = (uint8_t) ((significand*2-1)*7 + 0.5); // Shift and cast into a 8-bit uint8_t with rounding
383 // where just the first 3 bits are used (0, ..., 7)
384 tmp_uint8 = (uint8_t) (exponent-expmin); // Shift and cast into a 8-bit uint8_t where
385 // just the first 5 bits are used (0, ..., 2^5-1)
386 #ifdef DEBUG_TCH
387 printf("|ReaSX| / 2 : %16.8e\n",e_cross_b_re/2);
388 printf("significand : %16.8e\n",significand);
389 printf("exponent : %d\n" ,exponent);
390 printf("lfr_bp1[i*NB_BYTES_BP1+7] for ReaSX significand : %u\n",lfr_bp1[i*NB_BYTES_BP1+7]);
391 printf("tmp_uint8 for ReaSX exponent : %d\n",tmp_uint8);
392 #endif
393 lfr_bp1[i*NB_BYTES_BP1+7] = lfr_bp1[i*NB_BYTES_BP1+7] | (tmp_uint8 << 3); // shift these 5 bits to the left before logical addition
394 // with lfr_bp1[i*NB_BYTES_BP1+7]
395 #ifdef DEBUG_TCH
396 printf("lfr_bp1[i*NB_BYTES_BP1+7] for ReaSX exponent + significand : %u\n",lfr_bp1[i*NB_BYTES_BP1+7]);
397 printf("lfr_bp1[i*NB_BYTES_BP1+1] for ReaSX sign + PSDE 'exponent' : %u\n",lfr_bp1[i*NB_BYTES_BP1+1]);
398 printf("ImaSX / 2 : %16.8e\n",e_cross_b_im/2);
399 #endif
400 pt_uint8 = (uint8_t*) &e_cross_b_im; // Affect an uint8_t pointer with the adress of e_cross_b_im
401 #ifdef LSB_FIRST_TCH
402 pt_uint8[3] = pt_uint8[3] & 0x7f; // Make e_cross_b_im be positive in any case: |ImaSX|
403 #endif
404 #ifdef MSB_FIRST_TCH
405 pt_uint8[0] = pt_uint8[0] & 0x7f; // Make e_cross_b_im be positive in any case: |ImaSX|
406 #endif
407 tmp_uint8 = (e_cross_b_im > e_cross_b_re) ? 0x40 : 0x00; // Determine the sector argument of SX. If |Im| > |Re| affect
408 // an unsigned 8-bit char with 01000000; otherwise with null.
409 lfr_bp1[i*NB_BYTES_BP1+1] = lfr_bp1[i*NB_BYTES_BP1+1] | tmp_uint8; // Record it as a sign bit at the 7th bit position (from the right
410 // to the left) of lfr_bp1[i*NB_BYTES_BP1+1], by simple logical addition.
411 #ifdef DEBUG_TCH
412 printf("|ImaSX| / 2 : %16.8e\n",e_cross_b_im/2);
413 printf("ArgSX sign : %u\n",tmp_uint8);
414 printf("lfr_bp1[i*NB_BYTES_BP1+1] for ReaSX & ArgSX signs + PSDE 'exponent' : %u\n",lfr_bp1[i*NB_BYTES_BP1+1]);
415 #endif
416 //======================================================================
417 // BP1 phase velocity estimator == PA_LFR_SC_BP1_VPHI_F0 == 8 (+ 2) bits
418 // = 5 bits (exponent) + 3 bits (significand)
419 // + 1 sign bit + 1 argument bit (two sectors)
420 ny = sin(alpha_M)*NVEC_V1 + cos(alpha_M)*NVEC_V2;
421 nz = NVEC_V0;
422 bx_bx_star = cos(alpha_M)*cos(alpha_M)*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9] // S22 Re
423 + sin(alpha_M)*sin(alpha_M)*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+16] // S33 Re
424 - 2*sin(alpha_M)*cos(alpha_M)*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+10]; // S23 Re
425
426 n_cross_e_scal_b_re = ny * (compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+12]*k_f0[i][K24_NY_RE] //S24 Re
427 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+14]*k_f0[i][K25_NY_RE] //S25 Re
428 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+17]*k_f0[i][K34_NY_RE] //S34 Re
429 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+19]*k_f0[i][K35_NY_RE] //S35 Re
430 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+13]*k_f0[i][K24_NY_IM] //S24 Im
431 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+15]*k_f0[i][K25_NY_IM] //S25 Im
432 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+18]*k_f0[i][K34_NY_IM] //S34 Im
433 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+20]*k_f0[i][K35_NY_IM]) //S35 Im
434 + nz * (compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+12]*k_f0[i][K24_NZ_RE] //S24 Re
435 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+14]*k_f0[i][K25_NZ_RE] //S25 Re
436 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+17]*k_f0[i][K34_NZ_RE] //S34 Re
437 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+19]*k_f0[i][K35_NZ_RE] //S35 Re
438 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+13]*k_f0[i][K24_NZ_IM] //S24 Im
439 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+15]*k_f0[i][K25_NZ_IM] //S25 Im
440 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+18]*k_f0[i][K34_NZ_IM] //S34 Im
441 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+20]*k_f0[i][K35_NZ_IM]);//S35 Im
442 // Im(S_ji) = -Im(S_ij)
443 // k_ji = k_ij
444 n_cross_e_scal_b_im = ny * (compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+12]*k_f0[i][K24_NY_IM] //S24 Re
445 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+14]*k_f0[i][K25_NY_IM] //S25 Re
446 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+17]*k_f0[i][K34_NY_IM] //S34 Re
447 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+19]*k_f0[i][K35_NY_IM] //S35 Re
448 -compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+13]*k_f0[i][K24_NY_RE] //S24 Im
449 -compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+15]*k_f0[i][K25_NY_RE] //S25 Im
450 -compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+18]*k_f0[i][K34_NY_RE] //S34 Im
451 -compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+20]*k_f0[i][K35_NY_RE]) //S35 Im
452 + nz * (compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+12]*k_f0[i][K24_NZ_IM] //S24 Re
453 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+14]*k_f0[i][K25_NZ_IM] //S25 Re
454 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+17]*k_f0[i][K34_NZ_IM] //S34 Re
455 +compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+19]*k_f0[i][K35_NZ_IM] //S35 Re
456 -compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+13]*k_f0[i][K24_NZ_RE] //S24 Im
457 -compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+15]*k_f0[i][K25_NZ_RE] //S25 Im
458 -compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+18]*k_f0[i][K34_NZ_RE] //S34 Im
459 -compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+20]*k_f0[i][K35_NZ_RE]);//S35 Im
460 #ifdef DEBUG_TCH
461 printf("n_cross_e_scal_b_re : %16.8e\n",n_cross_e_scal_b_re);
462 printf("n_cross_e_scal_b_im : %16.8e\n",n_cross_e_scal_b_im);
463 #endif
464 // vphi = n_cross_e_scal_b_re / bx_bx_star => sign(VPHI) = sign(n_cross_e_scal_b_re)
465 pt_uint8 = (uint8_t*) &n_cross_e_scal_b_re; // Affect an uint8_t pointer with the adress of n_cross_e_scal_b_re
466 #ifdef LSB_FIRST_TCH
467 lfr_bp1[i*NB_BYTES_BP1+3] = lfr_bp1[i*NB_BYTES_BP1+3] | (pt_uint8[3] & 0x80); // Extract its sign bit (32-bit float, sign bit in the 4th octet:PC convention)
468 // Record it at the 8th bit position (from the right to the left)
469 // of lfr_bp1[i*NB_BYTES_BP1+3]
470 pt_uint8[3] = (pt_uint8[3] & 0x7f); // Make n_cross_e_scal_b_re be positive in any case: |n_cross_e_scal_b_re|
471 #endif
472 #ifdef MSB_FIRST_TCH
473 lfr_bp1[i*NB_BYTES_BP1+3] = lfr_bp1[i*NB_BYTES_BP1+3] | (pt_uint8[0] & 0x80); // Extract its sign bit (32-bit float, sign bit in the 0th octet:SPARC convention)
474 // Record it at the 8th bit position (from the right to the left)
475 // of lfr_bp1[i*NB_BYTES_BP1+3]
476 pt_uint8[0] = (pt_uint8[0] & 0x7f); // Make n_cross_e_scal_b_re be positive in any case: |n_cross_e_scal_b_re|
477 #endif
478 vphi = n_cross_e_scal_b_re / bx_bx_star; // Compute |VPHI|
479
480 significand = frexpf(vphi/2, &exponent); // 0.5 <= significand < 1
481 // vphi/2 = significand * 2^exponent
482 // The division by 2 is to ensure that max value <= 2^30 (rough estimate)
483 // Should be reconsidered by taking into account the k-coefficients ...
484
485 if (exponent < expmin) { // value should be >= 0.5 * 2^expmin
486 exponent = expmin;
487 significand = 0.5; // min value that can be recorded
488 }
489 if (exponent > expmax) { // value should be < 0.5 * 2^(expmax+1)
490 exponent = expmax;
491 significand = 1.0; // max value that can be recorded
492 }
493 if (significand == 0) {// in that case exponent == 0 too
494 exponent = expmin;
495 significand = 0.5; // min value that can be recorded
496 }
497 #ifdef DEBUG_TCH
498 printf("|VPHI| / 2 : %16.8e\n",vphi/2);
499 printf("significand : %16.8e\n",significand);
500 printf("exponent : %d\n" ,exponent);
501 #endif
502 lfr_bp1[i*NB_BYTES_BP1+8] = (uint8_t) ((significand*2-1)*7 + 0.5); // Shift and cast into a 8-bit uint8_t with rounding
503 // where just the first 3 bits are used (0, ..., 7)
504 tmp_uint8 = (uint8_t) (exponent-expmin); // Shift and cast into a 8-bit uint8_t where
505 // just the first 5 bits are used (0, ..., 2^5-1)
506 #ifdef DEBUG_TCH
507 printf("lfr_bp1[i*NB_BYTES_BP1+8] for VPHI significand : %u\n",lfr_bp1[i*NB_BYTES_BP1+8]);
508 printf("tmp_uint8 for VPHI exponent : %d\n",tmp_uint8);
509 #endif
510 lfr_bp1[i*NB_BYTES_BP1+8] = lfr_bp1[i*NB_BYTES_BP1+8] | (tmp_uint8 << 3); // shift these 5 bits to the left before logical addition
511 // with lfr_bp1[i*NB_BYTES_BP1+8]
512 #ifdef DEBUG_TCH
513 printf("lfr_bp1[i*NB_BYTES_BP1+8] for VPHI exponent + significand : %u\n",lfr_bp1[i*NB_BYTES_BP1+8]);
514 printf("lfr_bp1[i*NB_BYTES_BP1+3] for VPHI sign + PSDB 'exponent' : %u\n",lfr_bp1[i*NB_BYTES_BP1+3]);
515 #endif
516 pt_uint8 = (uint8_t*) &n_cross_e_scal_b_im; // Affect an uint8_t pointer with the adress of n_cross_e_scal_b_im
517 #ifdef LSB_FIRST_TCH
518 pt_uint8[3] = pt_uint8[3] & 0x7f; // Make n_cross_e_scal_b_im be positive in any case: |ImaSX|
519 #endif
520 #ifdef MSB_FIRST_TCH
521 pt_uint8[0] = pt_uint8[0] & 0x7f; // Make n_cross_e_scal_b_im be positive in any case: |ImaSX|
522 #endif
523 tmp_uint8 = (n_cross_e_scal_b_im > n_cross_e_scal_b_re) ? 0x40 : 0x00; // Determine the sector argument of SX. If |Im| > |Re| affect
524 // an unsigned 8-bit char with 01000000; otherwise with null.
525 lfr_bp1[i*NB_BYTES_BP1+3] = lfr_bp1[i*NB_BYTES_BP1+3] | tmp_uint8; // Record it as a sign bit at the 7th bit position (from the right
526 // to the left) of lfr_bp1[i*NB_BYTES_BP1+3], by simple logical addition.
527 #ifdef DEBUG_TCH
528 printf("|n_cross_e_scal_b_im| : %16.8e\n",n_cross_e_scal_b_im);
529 printf("|n_cross_e_scal_b_im|/bx_bx_star/2: %16.8e\n",n_cross_e_scal_b_im/bx_bx_star/2);
530 printf("ArgNEBX sign : %u\n",tmp_uint8);
531 printf("lfr_bp1[i*NB_BYTES_BP1+3] for VPHI & ArgNEBX signs + PSDB 'exponent' : %u\n",lfr_bp1[i*NB_BYTES_BP1+3]);
532 #endif
533 }
534 }
535
536 void BP2_set( float * compressed_spec_mat, uint8_t nb_bins_compressed_spec_mat, uint8_t * lfr_bp2 )
537 {
538 int i, exponent;
539 float aux, significand, cross_re, cross_im;
540 int8_t nbitexp, nbitsig, expmin, expmax; // 8 bits
541 int16_t rangesig; // 16 bits
542 uint16_t autocor, tmp_uint16; // 16 bits
543 uint16_t *pt_u_short_int; // pointer on unsigned 16-bit words
544
545 #ifdef DEBUG_TCH
546 printf("BP2 : \n");
547 printf("Number of bins: %d\n", nb_bins_compressed_spec_mat);
548 #endif
549
550 // For floating point data to be recorded on 16-bit words :
551 nbitexp = 6; // number of bits for the exponent
552 nbitsig = 16 - nbitexp; // number of bits for the significand
553 rangesig = (1 << nbitsig)-1; // == 2^nbitsig - 1
554 expmax = 32;
555 expmin = expmax - (1 << nbitexp) + 1;
556
557 #ifdef DEBUG_TCH
558 printf("nbitexp : %d, nbitsig : %d, rangesig : %d\n", nbitexp, nbitsig, rangesig);
559 printf("expmin : %d, expmax : %d\n", expmin, expmax);
560 #endif
561
562 for(i = 0; i<nb_bins_compressed_spec_mat; i++){
563 //==============================================
564 // BP2 normalized cross correlations == PA_LFR_SC_BP2_CROSS_F0 == 10 * (8+8) bits
565 // == PA_LFR_SC_BP2_CROSS_RE_0_F0 == 8 bits
566 // == PA_LFR_SC_BP2_CROSS_IM_0_F0 == 8 bits
567 // == PA_LFR_SC_BP2_CROSS_RE_1_F0 == 8 bits
568 // == PA_LFR_SC_BP2_CROSS_IM_1_F0 == 8 bits
569 // == PA_LFR_SC_BP2_CROSS_RE_2_F0 == 8 bits
570 // == PA_LFR_SC_BP2_CROSS_IM_2_F0 == 8 bits
571 // == PA_LFR_SC_BP2_CROSS_RE_3_F0 == 8 bits
572 // == PA_LFR_SC_BP2_CROSS_IM_3_F0 == 8 bits
573 // == PA_LFR_SC_BP2_CROSS_RE_4_F0 == 8 bits
574 // == PA_LFR_SC_BP2_CROSS_IM_4_F0 == 8 bits
575 // == PA_LFR_SC_BP2_CROSS_RE_5_F0 == 8 bits
576 // == PA_LFR_SC_BP2_CROSS_IM_5_F0 == 8 bits
577 // == PA_LFR_SC_BP2_CROSS_RE_6_F0 == 8 bits
578 // == PA_LFR_SC_BP2_CROSS_IM_6_F0 == 8 bits
579 // == PA_LFR_SC_BP2_CROSS_RE_7_F0 == 8 bits
580 // == PA_LFR_SC_BP2_CROSS_IM_7_F0 == 8 bits
581 // == PA_LFR_SC_BP2_CROSS_RE_8_F0 == 8 bits
582 // == PA_LFR_SC_BP2_CROSS_IM_8_F0 == 8 bits
583 // == PA_LFR_SC_BP2_CROSS_RE_9_F0 == 8 bits
584 // == PA_LFR_SC_BP2_CROSS_IM_9_F0 == 8 bits
585 // S12
586 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9]);
587 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+1] / aux;
588 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+2] / aux;
589 lfr_bp2[i*NB_BYTES_BP2+10] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
590 lfr_bp2[i*NB_BYTES_BP2+20] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
591 #ifdef DEBUG_TCH
592 printf("\nBin number: %d\n", i);
593 printf("lfr_bp2[i*NB_BYTES_BP2+10] for cross12_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+10]);
594 printf("lfr_bp2[i*NB_BYTES_BP2+20] for cross12_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+20]);
595 #endif
596 // S13
597 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+16]);
598 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+3] / aux;
599 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+4] / aux;
600 lfr_bp2[i*NB_BYTES_BP2+11] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
601 lfr_bp2[i*NB_BYTES_BP2+21] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
602 #ifdef DEBUG_TCH
603 printf("lfr_bp2[i*NB_BYTES_BP2+11] for cross13_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+11]);
604 printf("lfr_bp2[i*NB_BYTES_BP2+21] for cross13_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+21]);
605 #endif
606 // S14
607 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+21]);
608 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+5] / aux;
609 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+6] / aux;
610 lfr_bp2[i*NB_BYTES_BP2+12] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
611 lfr_bp2[i*NB_BYTES_BP2+22] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
612 #ifdef DEBUG_TCH
613 printf("lfr_bp2[i*NB_BYTES_BP2+12] for cross14_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+12]);
614 printf("lfr_bp2[i*NB_BYTES_BP2+22] for cross14_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+22]);
615 #endif
616 // S15
617 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+24]);
618 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+7] / aux;
619 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+8] / aux;
620 lfr_bp2[i*NB_BYTES_BP2+13] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
621 lfr_bp2[i*NB_BYTES_BP2+23] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
622 #ifdef DEBUG_TCH
623 printf("lfr_bp2[i*NB_BYTES_BP2+13] for cross15_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+13]);
624 printf("lfr_bp2[i*NB_BYTES_BP2+23] for cross15_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+23]);
625 #endif
626 // S23
627 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+16]);
628 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+10] / aux;
629 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+11] / aux;
630 lfr_bp2[i*NB_BYTES_BP2+14] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
631 lfr_bp2[i*NB_BYTES_BP2+24] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
632 #ifdef DEBUG_TCH
633 printf("lfr_bp2[i*NB_BYTES_BP2+14] for cross23_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+14]);
634 printf("lfr_bp2[i*NB_BYTES_BP2+24] for cross23_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+24]);
635 #endif
636 // S24
637 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+21]);
638 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+12] / aux;
639 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+13] / aux;
640 lfr_bp2[i*NB_BYTES_BP2+15] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
641 lfr_bp2[i*NB_BYTES_BP2+25] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
642 #ifdef DEBUG_TCH
643 printf("lfr_bp2[i*NB_BYTES_BP2+15] for cross24_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+15]);
644 printf("lfr_bp2[i*NB_BYTES_BP2+25] for cross24_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+25]);
645 #endif
646 // S25
647 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+24]);
648 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+14] / aux;
649 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+15] / aux;
650 lfr_bp2[i*NB_BYTES_BP2+16] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
651 lfr_bp2[i*NB_BYTES_BP2+26] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
652 #ifdef DEBUG_TCH
653 printf("lfr_bp2[i*NB_BYTES_BP2+16] for cross25_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+16]);
654 printf("lfr_bp2[i*NB_BYTES_BP2+26] for cross25_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+26]);
655 #endif
656 // S34
657 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+16]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+21]);
658 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+17] / aux;
659 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+18] / aux;
660 lfr_bp2[i*NB_BYTES_BP2+17] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
661 lfr_bp2[i*NB_BYTES_BP2+27] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
662 #ifdef DEBUG_TCH
663 printf("lfr_bp2[i*NB_BYTES_BP2+17] for cross34_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+17]);
664 printf("lfr_bp2[i*NB_BYTES_BP2+27] for cross34_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+27]);
665 #endif
666 // S35
667 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+16]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+24]);
668 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+19] / aux;
669 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+20] / aux;
670 lfr_bp2[i*NB_BYTES_BP2+18] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
671 lfr_bp2[i*NB_BYTES_BP2+28] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
672 #ifdef DEBUG_TCH
673 printf("lfr_bp2[i*NB_BYTES_BP2+18] for cross35_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+18]);
674 printf("lfr_bp2[i*NB_BYTES_BP2+28] for cross35_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+28]);
675 #endif
676 // S45
677 aux = sqrt(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+21]*compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+24]);
678 cross_re = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+22] / aux;
679 cross_im = compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+23] / aux;
680 lfr_bp2[i*NB_BYTES_BP2+19] = (uint8_t) (cross_re*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
681 lfr_bp2[i*NB_BYTES_BP2+29] = (uint8_t) (cross_im*127.5 + 128); // shift and cast into a 8-bit uint8_t (0, ..., 255) with rounding
682 #ifdef DEBUG_TCH
683 printf("lfr_bp2[i*NB_BYTES_BP2+19] for cross45_re (%16.8e) : %.3u\n",cross_re, lfr_bp2[i*NB_BYTES_BP2+19]);
684 printf("lfr_bp2[i*NB_BYTES_BP2+29] for cross45_im (%16.8e) : %.3u\n",cross_im, lfr_bp2[i*NB_BYTES_BP2+29]);
685 #endif
686 //==============================================
687 // BP2 auto correlations == PA_LFR_SC_BP2_AUTO_F0 == 5*16 bits = 5*[6 bits (exponent) + 10 bits (significand)]
688 // == PA_LFR_SC_BP2_AUTO_A0_F0 == 16 bits
689 // == PA_LFR_SC_BP2_AUTO_A1_F0 == 16 bits
690 // == PA_LFR_SC_BP2_AUTO_A2_F0 == 16 bits
691 // == PA_LFR_SC_BP2_AUTO_A3_F0 == 16 bits
692 // == PA_LFR_SC_BP2_AUTO_A4_F0 == 16 bits
693 // S11
694 significand = frexpf(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX], &exponent); // 0.5 <= significand < 1
695 // S11 = significand * 2^exponent
696 #ifdef DEBUG_TCH
697 printf("S11 : %16.8e\n",compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX]);
698 printf("significand : %16.8e\n",significand);
699 printf("exponent : %d\n" ,exponent);
700 #endif
701 if (exponent < expmin) { // value should be >= 0.5 * 2^expmin
702 exponent = expmin;
703 significand = 0.5; // min value that can be recorded
704 }
705 if (exponent > expmax) { // value should be < 0.5 * 2^(expmax+1)
706 exponent = expmax;
707 significand = 1.0; // max value that can be recorded
708 }
709 if (significand == 0) {// in that case exponent == 0 too
710 exponent = expmin;
711 significand = 0.5; // min value that can be recorded
712 }
713
714 autocor = (uint16_t) ((significand*2-1)*rangesig + 0.5); // Shift and cast into a 16-bit unsigned int with rounding
715 // where just the first nbitsig bits are used (0, ..., 2^nbitsig-1)
716 tmp_uint16 = (uint16_t) (exponent-expmin); // Shift and cast into a 16-bit unsigned int
717 // where just the first nbitexp bits are used (0, ..., 2^nbitexp-1)
718 pt_u_short_int = (uint16_t*) &lfr_bp2[i*NB_BYTES_BP2+0]; // Affect an uint16_t pointer with the
719 // adress where the 16-bit word result will be stored
720 *pt_u_short_int = autocor | (tmp_uint16 << nbitsig); // Put the exponent bits (nbitexp) next to the
721 // left place of the significand bits (nbitsig), making
722 // the 16-bit word to be recorded, and record it using the pointer
723 #ifdef DEBUG_TCH
724 printf("autocor for S11 significand : %u\n",autocor );
725 printf("tmp_uint8 for S11 exponent : %u\n",tmp_uint16 );
726 printf("*pt_u_short_int for S11 exponent + significand : %.3d or %x\n",*pt_u_short_int, *pt_u_short_int);
727 printf("lfr_bp2[i*NB_BYTES_BP2+1] : %u or %x\n",lfr_bp2[i*NB_BYTES_BP2+1], lfr_bp2[i*NB_BYTES_BP2+1]);
728 printf("lfr_bp2[i*NB_BYTES_BP2+0] : %u or %x\n",lfr_bp2[i*NB_BYTES_BP2+0], lfr_bp2[i*NB_BYTES_BP2+0]);
729 #endif
730 // S22
731 significand = frexpf(compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9], &exponent); // 0.5 <= significand < 1
732 // S22 = significand * 2^exponent
733 #ifdef DEBUG_TCH
734 printf("S22 : %16.8e\n",compressed_spec_mat[i*NB_VALUES_PER_SPECTRAL_MATRIX+9]);
735 printf("significand : %16.8e\n",significand);
736 printf("exponent : %d\n" ,exponent);
737 #endif
738 if (exponent < expmin) { // value should be >= 0.5 * 2^expmin
739 exponent = expmin;
740 significand = 0.5; // min value that can be recorded
741 }
742 if (exponent > expmax) { // value should be < 0.5 * 2^(expmax+1)
743 exponent = expmax;
744 significand = 1.0; // max value that can be recorded
745 }
746 if (significand == 0) {// in that case exponent == 0 too
747 exponent = expmin;
748 significand = 0.5; // min value that can be recorded
749 }