Line data Source code
1 : /******************************************************************************************************
2 :
3 : (C) 2022-2025 IVAS codec Public Collaboration with portions copyright Dolby International AB, Ericsson AB,
4 : Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
5 : Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
6 : Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
7 : contributors to this repository. All Rights Reserved.
8 :
9 : This software is protected by copyright law and by international treaties.
10 : The IVAS codec Public Collaboration consisting of Dolby International AB, Ericsson AB,
11 : Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
12 : Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
13 : Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
14 : contributors to this repository retain full ownership rights in their respective contributions in
15 : the software. This notice grants no license of any kind, including but not limited to patent
16 : license, nor is any license granted by implication, estoppel or otherwise.
17 :
18 : Contributors are required to enter into the IVAS codec Public Collaboration agreement before making
19 : contributions.
20 :
21 : This software is provided "AS IS", without any express or implied warranties. The software is in the
22 : development stage. It is intended exclusively for experts who have experience with such software and
23 : solely for the purpose of inspection. All implied warranties of non-infringement, merchantability
24 : and fitness for a particular purpose are hereby disclaimed and excluded.
25 :
26 : Any dispute, controversy or claim arising under or in relation to providing this software shall be
27 : submitted to and settled by the final, binding jurisdiction of the courts of Munich, Germany in
28 : accordance with the laws of the Federal Republic of Germany excluding its conflict of law rules and
29 : the United Nations Convention on Contracts on the International Sales of Goods.
30 :
31 : *******************************************************************************************************/
32 :
33 : /*====================================================================================
34 : EVS Codec 3GPP TS26.443 Nov 04, 2021. Version 12.14.0 / 13.10.0 / 14.6.0 / 15.4.0 / 16.3.0
35 : ====================================================================================*/
36 :
37 : #include <stdint.h>
38 : #include "options.h"
39 : #ifdef DEBUGGING
40 : #include "debug.h"
41 : #endif
42 : #include "cnst.h"
43 : #include "rom_com.h"
44 : #include "prot.h"
45 : #include "wmc_auto.h"
46 : #include <math.h> /* for cosf, sinf */
47 : #include <assert.h>
48 :
49 6110517 : static ivas_error get_edct_table(
50 : const float **edct_table,
51 : const int16_t length )
52 : {
53 : ivas_error error;
54 :
55 6110517 : error = IVAS_ERR_OK;
56 6110517 : *edct_table = NULL;
57 :
58 6110517 : switch ( length )
59 : {
60 30232 : case 1200:
61 30232 : *edct_table = edct_table_600;
62 30232 : break;
63 2591310 : case 960:
64 2591310 : *edct_table = edct_table_480;
65 2591310 : break;
66 1432732 : case 640:
67 1432732 : *edct_table = edct_table_320;
68 1432732 : break;
69 657824 : case 320:
70 657824 : *edct_table = edct_table_160;
71 657824 : break;
72 546311 : case 256:
73 546311 : *edct_table = edct_table_128;
74 546311 : break;
75 89199 : case 240:
76 89199 : *edct_table = edct_table_120;
77 89199 : break;
78 0 : case 200:
79 0 : *edct_table = edct_table_100;
80 0 : break;
81 86648 : case 160:
82 86648 : *edct_table = edct_table_80;
83 86648 : break;
84 0 : case 40:
85 0 : *edct_table = edct_table_20;
86 0 : break;
87 5611 : case 800:
88 5611 : *edct_table = edct_table_400;
89 5611 : break;
90 567200 : case 512:
91 567200 : *edct_table = edct_table_256;
92 567200 : break;
93 40345 : case 480:
94 40345 : *edct_table = edct_table_240;
95 40345 : break;
96 19231 : case 400:
97 19231 : *edct_table = edct_table_200;
98 19231 : break;
99 30960 : case 128:
100 30960 : *edct_table = edct_table_64;
101 30960 : break;
102 12914 : case 80:
103 12914 : *edct_table = edct_table_40;
104 12914 : break;
105 : #ifdef DEBUGGING
106 : default:
107 : return IVAS_ERROR( IVAS_ERR_INTERNAL_FATAL, "edct/edst(): length is not in table!" );
108 : #endif
109 : }
110 :
111 6110517 : return error;
112 : }
113 :
114 :
115 : /*-----------------------------------------------------------------*
116 : * edct()
117 : *
118 : * DCT-IV transform
119 : *-----------------------------------------------------------------*/
120 :
121 5426693 : void edct(
122 : const float *x, /* i : input signal */
123 : float *y, /* o : output transform */
124 : const int16_t length, /* i : length */
125 : const int16_t element_mode /* i : IVAS element mode */
126 : )
127 : {
128 : int16_t i;
129 : float re[L_FRAME_PLUS / 2];
130 : float im[L_FRAME_PLUS / 2];
131 5426693 : const float *edct_table = 0;
132 : float local;
133 :
134 5426693 : get_edct_table( &edct_table, length );
135 :
136 : /* Twiddling and Pre-rotate */
137 1791472077 : for ( i = 0; i < length / 2; i++ )
138 : {
139 1786045384 : re[i] = x[2 * i] * edct_table[i] + x[length - 1 - 2 * i] * edct_table[length / 2 - 1 - i];
140 1786045384 : im[i] = x[length - 1 - 2 * i] * edct_table[i] - x[2 * i] * edct_table[length / 2 - 1 - i];
141 : }
142 :
143 5426693 : if ( element_mode == EVS_MONO )
144 : {
145 59410 : DoFFT( re, im, length / 2 );
146 : }
147 : else
148 : {
149 5367283 : fft( re, im, length / 2, 1 );
150 : }
151 :
152 5426693 : local = ( 0.75f * EVS_PI ) / length;
153 :
154 1791472077 : for ( i = 0; i < length / 2; i++ )
155 : {
156 : float tmp;
157 1786045384 : tmp = re[i] - im[i] * local; /* 3*pi/(4*length) is a constant */
158 1786045384 : im[i] = im[i] + re[i] * local;
159 1786045384 : re[i] = tmp;
160 : }
161 :
162 : /* Post-rotate and obtain the output data */
163 1791472077 : for ( i = 0; i < length / 2; i++ )
164 : {
165 1786045384 : y[2 * i] = re[i] * edct_table[i] + im[i] * edct_table[length / 2 - 1 - i];
166 1786045384 : y[length - 1 - 2 * i] = re[i] * edct_table[length / 2 - 1 - i] - im[i] * edct_table[i];
167 : }
168 :
169 5426693 : return;
170 : }
171 :
172 :
173 : /*-------------------------------------------------------------------------*
174 : * edst()
175 : *
176 : * DST-IV transform
177 : *-------------------------------------------------------------------------*/
178 :
179 683824 : void edst(
180 : const float *x, /* i : input signal */
181 : float *y, /* o : output transform */
182 : const int16_t length, /* i : length */
183 : const int16_t element_mode /* i : IVAS element mode */
184 : )
185 : {
186 : int16_t i;
187 : float re[L_FRAME_PLUS / 2];
188 : float im[L_FRAME_PLUS / 2];
189 683824 : const float *edct_table = 0;
190 : float local;
191 :
192 683824 : get_edct_table( &edct_table, length );
193 :
194 : /* Twiddling and Pre-rotate */
195 291370648 : for ( i = 0; i < length / 2; i++ )
196 : {
197 290686824 : re[i] = x[length - 1 - 2 * i] * edct_table[i] + x[2 * i] * edct_table[length / 2 - 1 - i];
198 290686824 : im[i] = x[2 * i] * edct_table[i] - x[length - 1 - 2 * i] * edct_table[length / 2 - 1 - i];
199 : }
200 :
201 683824 : if ( element_mode == EVS_MONO )
202 : {
203 8289 : DoFFT( re, im, length / 2 );
204 : }
205 : else
206 : {
207 675535 : fft( re, im, length / 2, 1 );
208 : }
209 :
210 683824 : local = ( 0.75f * EVS_PI ) / length;
211 :
212 291370648 : for ( i = 0; i < length / 2; i++ )
213 : {
214 : float tmp;
215 290686824 : tmp = re[i] - im[i] * local; /* 3*pi/(4*length) is a constant */
216 290686824 : im[i] = im[i] + re[i] * local;
217 290686824 : re[i] = tmp;
218 : }
219 :
220 : /* Post-rotate and obtain the output data */
221 291370648 : for ( i = 0; i < length / 2; i++ )
222 : {
223 290686824 : y[2 * i] = re[i] * edct_table[i] + im[i] * edct_table[length / 2 - 1 - i];
224 290686824 : y[length - 1 - 2 * i] = im[i] * edct_table[i] - re[i] * edct_table[length / 2 - 1 - i];
225 : }
226 :
227 683824 : return;
228 : }
229 :
230 :
231 : /*-------------------------------------------------------------------------*
232 : * edxt()
233 : *
234 : * DCT/DST-II or III transform (currently also calculates DCT-IV and DST-IV)
235 : *-------------------------------------------------------------------------*/
236 :
237 1663 : void edxt(
238 : const float *x, /* i : input signal */
239 : float *y, /* o : output transform */
240 : const int16_t length, /* i : length */
241 : const uint16_t kernelType, /* i : kernel type (0 - 3) */
242 : const uint16_t synthesis /* i : nonzero for inverse */
243 : )
244 : {
245 1663 : const float pi_len = EVS_PI / length;
246 : int16_t k;
247 :
248 1663 : if ( kernelType == MDST_II || kernelType == MDCT_II )
249 1663 : {
250 1663 : const int16_t Nm1 = length - 1;
251 1663 : const float xSign = 2.f * ( kernelType >> 1 ) - 1.f;
252 1663 : const float scale = 0.5f * pi_len;
253 : float re[L_FRAME_PLUS];
254 : float im[L_FRAME_PLUS];
255 :
256 1663 : if ( !synthesis )
257 : {
258 121217 : for ( k = Nm1 >> 1; k >= 0; k-- ) /* pre-modulation of audio input */
259 : {
260 120800 : re[k] = x[2 * k];
261 120800 : re[Nm1 - k] = x[2 * k + 1] * xSign;
262 120800 : im[k] = im[Nm1 - k] = 0.f;
263 : }
264 :
265 417 : if ( length == 512 )
266 : {
267 0 : DoRTFTn( re, im, 512 );
268 : }
269 : else /* fft() doesn't support 512 */
270 : {
271 417 : fft( re, im, length, 1 );
272 : }
273 :
274 417 : if ( kernelType >> 1 )
275 : {
276 59720 : for ( k = Nm1 >> 1; k > 0; k-- )
277 : {
278 59512 : volatile float angle_tmp = scale * k;
279 59512 : const float wRe = cosf( angle_tmp );
280 59512 : const float wIm = sinf( angle_tmp );
281 :
282 59512 : y[k] /*pt 1*/ = wRe * re[k] + wIm * im[k];
283 59512 : y[length - k] = wIm * re[k] - wRe * im[k];
284 : }
285 208 : y[length >> 1] = re[length >> 1] * sqrtf( 0.5f );
286 : }
287 : else /* forw. DST-II */
288 : {
289 61080 : for ( k = Nm1 >> 1; k > 0; k-- )
290 : {
291 60871 : volatile float angle_tmp = scale * k;
292 60871 : const float wRe = cosf( angle_tmp );
293 60871 : const float wIm = sinf( angle_tmp );
294 :
295 60871 : y[Nm1 - k] = wRe * re[k] + wIm * im[k];
296 60871 : y[k - 1] = wIm * re[k] - wRe * im[k];
297 : }
298 209 : y[Nm1 >> 1] = re[length >> 1] * sqrtf( 0.5f );
299 : }
300 :
301 417 : y[Nm1 - Nm1 * ( kernelType >> 1 )] = re[0] * 0.5f;
302 : }
303 : else /* inverse II = III */
304 : {
305 1246 : if ( kernelType >> 1 )
306 : {
307 151560 : for ( k = Nm1 >> 1; k > 0; k-- )
308 : {
309 150944 : volatile float angle_tmp = scale * k;
310 150944 : const float wRe = cosf( angle_tmp ) * 0.5f;
311 150944 : const float wIm = sinf( angle_tmp ) * 0.5f;
312 :
313 150944 : re[k] = wRe * x[k] + wIm * x[length - k];
314 150944 : im[k] = wRe * x[length - k] - wIm * x[k];
315 : }
316 616 : re[length >> 1] = x[length >> 1] * sqrtf( 0.5f );
317 : }
318 : else /* DST type III */
319 : {
320 156336 : for ( k = Nm1 >> 1; k > 0; k-- )
321 : {
322 155706 : volatile float angle_tmp = scale * k;
323 155706 : const float wRe = cosf( angle_tmp ) * 0.5f;
324 155706 : const float wIm = sinf( angle_tmp ) * 0.5f;
325 :
326 155706 : re[k] = wRe * x[Nm1 - k] + wIm * x[k - 1];
327 155706 : im[k] = wRe * x[k - 1] - wIm * x[Nm1 - k];
328 : }
329 630 : re[length >> 1] = x[Nm1 >> 1] * sqrtf( 0.5f );
330 : }
331 :
332 1246 : re[0] = x[Nm1 - Nm1 * ( kernelType >> 1 )];
333 1246 : im[0] = im[length >> 1] = 0.f;
334 307896 : for ( k = Nm1 >> 1; k > 0; k-- )
335 : {
336 306650 : re[length - k] = re[k];
337 306650 : im[length - k] = -im[k];
338 : }
339 :
340 1246 : if ( length == 512 )
341 : {
342 330 : DoRTFTn( re, im, 512 );
343 : }
344 : else /* fft() doesn't support 512 */
345 : {
346 916 : fft( re, im, length, 1 );
347 : }
348 :
349 309142 : for ( k = Nm1 >> 1; k >= 0; k-- ) /* post-modulation of FFT output */
350 : {
351 307896 : y[2 * k] = re[k];
352 307896 : y[2 * k + 1] = re[Nm1 - k] * xSign;
353 : }
354 : }
355 : }
356 : else
357 : {
358 0 : assert( !"Unsupported Kernel type in edxt()" );
359 : }
360 :
361 1663 : v_multc( y, ( kernelType == MDCT_II ? -1.f : 1.f ) * sqrtf( 2.f / length ), y, length );
362 :
363 1663 : return;
364 : }
365 :
366 : /*-----------------------------------------------------------------*
367 : * iedct_short()
368 : *
369 : * Inverse EDCT for short frames
370 : *-----------------------------------------------------------------*/
371 :
372 6344 : void iedct_short(
373 : const float *in, /* i : input vector */
374 : float *out, /* o : output vector */
375 : const int16_t segment_length, /* i : length */
376 : const int16_t element_mode /* i : IVAS element mode */
377 : )
378 : {
379 : float alias[MAX_SEGMENT_LENGTH];
380 : int16_t i;
381 :
382 6344 : edct( in, alias, segment_length / 2, element_mode );
383 :
384 440104 : for ( i = 0; i < segment_length / 4; i++ )
385 : {
386 433760 : out[i] = alias[segment_length / 4 + i];
387 433760 : out[segment_length / 4 + i] = -alias[segment_length / 2 - 1 - i];
388 433760 : out[segment_length / 2 + i] = -alias[segment_length / 4 - 1 - i];
389 433760 : out[3 * segment_length / 4 + i] = -alias[i];
390 : }
391 :
392 6344 : return;
393 : }
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