FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
fft-test.c
Go to the documentation of this file.
1 /*
2  * (c) 2002 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * FFT and MDCT tests.
24  */
25 
26 #include "config.h"
27 
28 #include <math.h>
29 #if HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 
36 #include "libavutil/cpu.h"
37 #include "libavutil/lfg.h"
38 #include "libavutil/log.h"
39 #include "libavutil/mathematics.h"
40 #include "libavutil/time.h"
41 
42 #include "fft.h"
43 #if FFT_FLOAT
44 #include "dct.h"
45 #include "rdft.h"
46 #endif
47 
48 /* reference fft */
49 
50 #define MUL16(a, b) ((a) * (b))
51 
52 #define CMAC(pre, pim, are, aim, bre, bim) \
53  { \
54  pre += (MUL16(are, bre) - MUL16(aim, bim)); \
55  pim += (MUL16(are, bim) + MUL16(bre, aim)); \
56  }
57 
58 #if FFT_FLOAT
59 #define RANGE 1.0
60 #define REF_SCALE(x, bits) (x)
61 #define FMT "%10.6f"
62 #elif FFT_FIXED_32
63 #define RANGE 8388608
64 #define REF_SCALE(x, bits) (x)
65 #define FMT "%6d"
66 #else
67 #define RANGE 16384
68 #define REF_SCALE(x, bits) ((x) / (1 << (bits)))
69 #define FMT "%6d"
70 #endif
71 
72 static struct {
73  float re, im;
74 } *exptab;
75 
76 static int fft_ref_init(int nbits, int inverse)
77 {
78  int i, n = 1 << nbits;
79 
80  exptab = av_malloc_array((n / 2), sizeof(*exptab));
81  if (!exptab)
82  return AVERROR(ENOMEM);
83 
84  for (i = 0; i < (n / 2); i++) {
85  double alpha = 2 * M_PI * (float) i / (float) n;
86  double c1 = cos(alpha), s1 = sin(alpha);
87  if (!inverse)
88  s1 = -s1;
89  exptab[i].re = c1;
90  exptab[i].im = s1;
91  }
92  return 0;
93 }
94 
95 static void fft_ref(FFTComplex *tabr, FFTComplex *tab, int nbits)
96 {
97  int i, j;
98  int n = 1 << nbits;
99  int n2 = n >> 1;
100 
101  for (i = 0; i < n; i++) {
102  double tmp_re = 0, tmp_im = 0;
103  FFTComplex *q = tab;
104  for (j = 0; j < n; j++) {
105  double s, c;
106  int k = (i * j) & (n - 1);
107  if (k >= n2) {
108  c = -exptab[k - n2].re;
109  s = -exptab[k - n2].im;
110  } else {
111  c = exptab[k].re;
112  s = exptab[k].im;
113  }
114  CMAC(tmp_re, tmp_im, c, s, q->re, q->im);
115  q++;
116  }
117  tabr[i].re = REF_SCALE(tmp_re, nbits);
118  tabr[i].im = REF_SCALE(tmp_im, nbits);
119  }
120 }
121 
122 #if CONFIG_MDCT
123 static void imdct_ref(FFTSample *out, FFTSample *in, int nbits)
124 {
125  int i, k, n = 1 << nbits;
126 
127  for (i = 0; i < n; i++) {
128  double sum = 0;
129  for (k = 0; k < n / 2; k++) {
130  int a = (2 * i + 1 + (n / 2)) * (2 * k + 1);
131  double f = cos(M_PI * a / (double) (2 * n));
132  sum += f * in[k];
133  }
134  out[i] = REF_SCALE(-sum, nbits - 2);
135  }
136 }
137 
138 /* NOTE: no normalisation by 1 / N is done */
139 static void mdct_ref(FFTSample *output, FFTSample *input, int nbits)
140 {
141  int i, k, n = 1 << nbits;
142 
143  /* do it by hand */
144  for (k = 0; k < n / 2; k++) {
145  double s = 0;
146  for (i = 0; i < n; i++) {
147  double a = (2 * M_PI * (2 * i + 1 + n / 2) * (2 * k + 1) / (4 * n));
148  s += input[i] * cos(a);
149  }
150  output[k] = REF_SCALE(s, nbits - 1);
151  }
152 }
153 #endif /* CONFIG_MDCT */
154 
155 #if FFT_FLOAT
156 #if CONFIG_DCT
157 static void idct_ref(FFTSample *output, FFTSample *input, int nbits)
158 {
159  int i, k, n = 1 << nbits;
160 
161  /* do it by hand */
162  for (i = 0; i < n; i++) {
163  double s = 0.5 * input[0];
164  for (k = 1; k < n; k++) {
165  double a = M_PI * k * (i + 0.5) / n;
166  s += input[k] * cos(a);
167  }
168  output[i] = 2 * s / n;
169  }
170 }
171 
172 static void dct_ref(FFTSample *output, FFTSample *input, int nbits)
173 {
174  int i, k, n = 1 << nbits;
175 
176  /* do it by hand */
177  for (k = 0; k < n; k++) {
178  double s = 0;
179  for (i = 0; i < n; i++) {
180  double a = M_PI * k * (i + 0.5) / n;
181  s += input[i] * cos(a);
182  }
183  output[k] = s;
184  }
185 }
186 #endif /* CONFIG_DCT */
187 #endif /* FFT_FLOAT */
188 
189 static FFTSample frandom(AVLFG *prng)
190 {
191  return (int16_t) av_lfg_get(prng) / 32768.0 * RANGE;
192 }
193 
194 static int check_diff(FFTSample *tab1, FFTSample *tab2, int n, double scale)
195 {
196  int i, err = 0;
197  double error = 0, max = 0;
198 
199  for (i = 0; i < n; i++) {
200  double e = fabs(tab1[i] - (tab2[i] / scale)) / RANGE;
201  if (e >= 1e-3) {
202  av_log(NULL, AV_LOG_ERROR, "ERROR %5d: "FMT" "FMT"\n",
203  i, tab1[i], tab2[i]);
204  err = 1;
205  }
206  error += e * e;
207  if (e > max)
208  max = e;
209  }
210  av_log(NULL, AV_LOG_INFO, "max:%f e:%g\n", max, sqrt(error / n));
211  return err;
212 }
213 
214 static void help(void)
215 {
217  "usage: fft-test [-h] [-s] [-i] [-n b]\n"
218  "-h print this help\n"
219  "-s speed test\n"
220  "-m (I)MDCT test\n"
221  "-d (I)DCT test\n"
222  "-r (I)RDFT test\n"
223  "-i inverse transform test\n"
224  "-n b set the transform size to 2^b\n"
225  "-f x set scale factor for output data of (I)MDCT to x\n");
226 }
227 
233 };
234 
235 #if !HAVE_GETOPT
236 #include "compat/getopt.c"
237 #endif
238 
239 int main(int argc, char **argv)
240 {
241  FFTComplex *tab, *tab1, *tab_ref;
242  FFTSample *tab2;
244  FFTContext m, s;
245 #if FFT_FLOAT
246  RDFTContext r;
247  DCTContext d;
248 #endif /* FFT_FLOAT */
249  int it, i, err = 1;
250  int do_speed = 0, do_inverse = 0;
251  int fft_nbits = 9, fft_size;
252  double scale = 1.0;
253  AVLFG prng;
254 
255  av_lfg_init(&prng, 1);
256 
257  for (;;) {
258  int c = getopt(argc, argv, "hsimrdn:f:c:");
259  if (c == -1)
260  break;
261  switch (c) {
262  case 'h':
263  help();
264  return 1;
265  case 's':
266  do_speed = 1;
267  break;
268  case 'i':
269  do_inverse = 1;
270  break;
271  case 'm':
272  transform = TRANSFORM_MDCT;
273  break;
274  case 'r':
275  transform = TRANSFORM_RDFT;
276  break;
277  case 'd':
278  transform = TRANSFORM_DCT;
279  break;
280  case 'n':
281  fft_nbits = atoi(optarg);
282  break;
283  case 'f':
284  scale = atof(optarg);
285  break;
286  case 'c':
287  {
288  unsigned cpuflags = av_get_cpu_flags();
289 
290  if (av_parse_cpu_caps(&cpuflags, optarg) < 0)
291  return 1;
292 
293  av_force_cpu_flags(cpuflags);
294  break;
295  }
296  }
297  }
298 
299  fft_size = 1 << fft_nbits;
300  tab = av_malloc_array(fft_size, sizeof(FFTComplex));
301  tab1 = av_malloc_array(fft_size, sizeof(FFTComplex));
302  tab_ref = av_malloc_array(fft_size, sizeof(FFTComplex));
303  tab2 = av_malloc_array(fft_size, sizeof(FFTSample));
304 
305  if (!(tab && tab1 && tab_ref && tab2))
306  goto cleanup;
307 
308  switch (transform) {
309 #if CONFIG_MDCT
310  case TRANSFORM_MDCT:
311  av_log(NULL, AV_LOG_INFO, "Scale factor is set to %f\n", scale);
312  if (do_inverse)
313  av_log(NULL, AV_LOG_INFO, "IMDCT");
314  else
315  av_log(NULL, AV_LOG_INFO, "MDCT");
316  ff_mdct_init(&m, fft_nbits, do_inverse, scale);
317  break;
318 #endif /* CONFIG_MDCT */
319  case TRANSFORM_FFT:
320  if (do_inverse)
321  av_log(NULL, AV_LOG_INFO, "IFFT");
322  else
323  av_log(NULL, AV_LOG_INFO, "FFT");
324  ff_fft_init(&s, fft_nbits, do_inverse);
325  if ((err = fft_ref_init(fft_nbits, do_inverse)) < 0)
326  goto cleanup;
327  break;
328 #if FFT_FLOAT
329 # if CONFIG_RDFT
330  case TRANSFORM_RDFT:
331  if (do_inverse)
332  av_log(NULL, AV_LOG_INFO, "IDFT_C2R");
333  else
334  av_log(NULL, AV_LOG_INFO, "DFT_R2C");
335  ff_rdft_init(&r, fft_nbits, do_inverse ? IDFT_C2R : DFT_R2C);
336  if ((err = fft_ref_init(fft_nbits, do_inverse)) < 0)
337  goto cleanup;
338  break;
339 # endif /* CONFIG_RDFT */
340 # if CONFIG_DCT
341  case TRANSFORM_DCT:
342  if (do_inverse)
343  av_log(NULL, AV_LOG_INFO, "DCT_III");
344  else
345  av_log(NULL, AV_LOG_INFO, "DCT_II");
346  ff_dct_init(&d, fft_nbits, do_inverse ? DCT_III : DCT_II);
347  break;
348 # endif /* CONFIG_DCT */
349 #endif /* FFT_FLOAT */
350  default:
351  av_log(NULL, AV_LOG_ERROR, "Requested transform not supported\n");
352  goto cleanup;
353  }
354  av_log(NULL, AV_LOG_INFO, " %d test\n", fft_size);
355 
356  /* generate random data */
357 
358  for (i = 0; i < fft_size; i++) {
359  tab1[i].re = frandom(&prng);
360  tab1[i].im = frandom(&prng);
361  }
362 
363  /* checking result */
364  av_log(NULL, AV_LOG_INFO, "Checking...\n");
365 
366  switch (transform) {
367 #if CONFIG_MDCT
368  case TRANSFORM_MDCT:
369  if (do_inverse) {
370  imdct_ref(&tab_ref->re, &tab1->re, fft_nbits);
371  m.imdct_calc(&m, tab2, &tab1->re);
372  err = check_diff(&tab_ref->re, tab2, fft_size, scale);
373  } else {
374  mdct_ref(&tab_ref->re, &tab1->re, fft_nbits);
375  m.mdct_calc(&m, tab2, &tab1->re);
376  err = check_diff(&tab_ref->re, tab2, fft_size / 2, scale);
377  }
378  break;
379 #endif /* CONFIG_MDCT */
380  case TRANSFORM_FFT:
381  memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
382  s.fft_permute(&s, tab);
383  s.fft_calc(&s, tab);
384 
385  fft_ref(tab_ref, tab1, fft_nbits);
386  err = check_diff(&tab_ref->re, &tab->re, fft_size * 2, 1.0);
387  break;
388 #if FFT_FLOAT
389 #if CONFIG_RDFT
390  case TRANSFORM_RDFT:
391  {
392  int fft_size_2 = fft_size >> 1;
393  if (do_inverse) {
394  tab1[0].im = 0;
395  tab1[fft_size_2].im = 0;
396  for (i = 1; i < fft_size_2; i++) {
397  tab1[fft_size_2 + i].re = tab1[fft_size_2 - i].re;
398  tab1[fft_size_2 + i].im = -tab1[fft_size_2 - i].im;
399  }
400 
401  memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
402  tab2[1] = tab1[fft_size_2].re;
403 
404  r.rdft_calc(&r, tab2);
405  fft_ref(tab_ref, tab1, fft_nbits);
406  for (i = 0; i < fft_size; i++) {
407  tab[i].re = tab2[i];
408  tab[i].im = 0;
409  }
410  err = check_diff(&tab_ref->re, &tab->re, fft_size * 2, 0.5);
411  } else {
412  for (i = 0; i < fft_size; i++) {
413  tab2[i] = tab1[i].re;
414  tab1[i].im = 0;
415  }
416  r.rdft_calc(&r, tab2);
417  fft_ref(tab_ref, tab1, fft_nbits);
418  tab_ref[0].im = tab_ref[fft_size_2].re;
419  err = check_diff(&tab_ref->re, tab2, fft_size, 1.0);
420  }
421  break;
422  }
423 #endif /* CONFIG_RDFT */
424 #if CONFIG_DCT
425  case TRANSFORM_DCT:
426  memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
427  d.dct_calc(&d, &tab->re);
428  if (do_inverse)
429  idct_ref(&tab_ref->re, &tab1->re, fft_nbits);
430  else
431  dct_ref(&tab_ref->re, &tab1->re, fft_nbits);
432  err = check_diff(&tab_ref->re, &tab->re, fft_size, 1.0);
433  break;
434 #endif /* CONFIG_DCT */
435 #endif /* FFT_FLOAT */
436  }
437 
438  /* do a speed test */
439 
440  if (do_speed) {
441  int64_t time_start, duration;
442  int nb_its;
443 
444  av_log(NULL, AV_LOG_INFO, "Speed test...\n");
445  /* we measure during about 1 seconds */
446  nb_its = 1;
447  for (;;) {
448  time_start = av_gettime_relative();
449  for (it = 0; it < nb_its; it++) {
450  switch (transform) {
451  case TRANSFORM_MDCT:
452  if (do_inverse)
453  m.imdct_calc(&m, &tab->re, &tab1->re);
454  else
455  m.mdct_calc(&m, &tab->re, &tab1->re);
456  break;
457  case TRANSFORM_FFT:
458  memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
459  s.fft_calc(&s, tab);
460  break;
461 #if FFT_FLOAT
462  case TRANSFORM_RDFT:
463  memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
464  r.rdft_calc(&r, tab2);
465  break;
466  case TRANSFORM_DCT:
467  memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
468  d.dct_calc(&d, tab2);
469  break;
470 #endif /* FFT_FLOAT */
471  }
472  }
473  duration = av_gettime_relative() - time_start;
474  if (duration >= 1000000)
475  break;
476  nb_its *= 2;
477  }
479  "time: %0.1f us/transform [total time=%0.2f s its=%d]\n",
480  (double) duration / nb_its,
481  (double) duration / 1000000.0,
482  nb_its);
483  }
484 
485  switch (transform) {
486 #if CONFIG_MDCT
487  case TRANSFORM_MDCT:
488  ff_mdct_end(&m);
489  break;
490 #endif /* CONFIG_MDCT */
491  case TRANSFORM_FFT:
492  ff_fft_end(&s);
493  break;
494 #if FFT_FLOAT
495 # if CONFIG_RDFT
496  case TRANSFORM_RDFT:
497  ff_rdft_end(&r);
498  break;
499 # endif /* CONFIG_RDFT */
500 # if CONFIG_DCT
501  case TRANSFORM_DCT:
502  ff_dct_end(&d);
503  break;
504 # endif /* CONFIG_DCT */
505 #endif /* FFT_FLOAT */
506  }
507 
508 cleanup:
509  av_free(tab);
510  av_free(tab1);
511  av_free(tab2);
512  av_free(tab_ref);
513  av_free(exptab);
514 
515  if (err)
516  printf("Error: %d.\n", err);
517 
518  return !!err;
519 }
Definition: lfg.h:25
av_cold void ff_rdft_end(RDFTContext *s)
Definition: rdft.c:132
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
void(* dct_calc)(struct DCTContext *s, FFTSample *data)
Definition: dct.h:37
void(* mdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:109
Definition: avfft.h:95
void(* fft_permute)(struct FFTContext *s, FFTComplex *z)
Do the permutation needed BEFORE calling fft_calc().
Definition: fft.h:101
FFTSample re
Definition: avfft.h:38
tf_transform
Definition: fft-test.c:228
static void fft_ref(FFTComplex *tabr, FFTComplex *tab, int nbits)
Definition: fft-test.c:95
static const uint64_t c1
Definition: murmur3.c:49
static void help(void)
Definition: fft-test.c:214
#define av_log(a,...)
unsigned m
Definition: audioconvert.c:187
static double alpha(void *priv, double x, double y)
Definition: vf_geq.c:99
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
const char * r
Definition: vf_curves.c:107
static FFTSample frandom(AVLFG *prng)
Definition: fft-test.c:189
Definition: avfft.h:73
#define ff_mdct_init
Definition: fft.h:169
float FFTSample
Definition: avfft.h:35
int av_parse_cpu_caps(unsigned *flags, const char *s)
Parse CPU caps from a string and update the given AV_CPU_* flags based on that.
Definition: cpu.c:181
void(* rdft_calc)(struct RDFTContext *s, FFTSample *z)
Definition: rdft.h:60
void(* imdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:107
Definition: fft.h:88
#define CMAC(pre, pim, are, aim, bre, bim)
Definition: fft-test.c:52
#define ff_fft_init
Definition: fft.h:149
int64_t duration
Definition: movenc-test.c:63
Definition: dct.h:31
Definition: avfft.h:72
int n
Definition: avisynth_c.h:547
FILE * out
Definition: movenc-test.c:54
#define REF_SCALE(x, bits)
Definition: fft-test.c:68
static const int8_t transform[32][32]
Definition: hevcdsp.c:27
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
float im
Definition: fft-test.c:73
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
static int getopt(int argc, char *argv[], char *opts)
Definition: getopt.c:41
static unsigned int av_lfg_get(AVLFG *c)
Get the next random unsigned 32-bit number using an ALFG.
Definition: lfg.h:38
const int16_t * tab1
Definition: mace.c:144
av_cold int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType inverse)
Set up DCT.
Definition: dct.c:177
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
Definition: lfg.c:30
#define s1
Definition: regdef.h:38
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:76
#define FMT
Definition: fft-test.c:69
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
#define RANGE
Definition: fft-test.c:67
int main(int argc, char **argv)
Definition: fft-test.c:239
FFTSample im
Definition: avfft.h:38
#define ff_mdct_end
Definition: fft.h:170
static double c[64]
#define ff_fft_end
Definition: fft.h:150
void(* fft_calc)(struct FFTContext *s, FFTComplex *z)
Do a complex FFT with the parameters defined in ff_fft_init().
Definition: fft.h:106
Definition: avfft.h:94
static char * optarg
Definition: getopt.c:39
static int check_diff(FFTSample *tab1, FFTSample *tab2, int n, double scale)
Definition: fft-test.c:194
float re
Definition: fft-test.c:73
#define av_free(p)
av_cold void ff_dct_end(DCTContext *s)
Definition: dct.c:220
static const struct twinvq_data tab
static int fft_ref_init(int nbits, int inverse)
Definition: fft-test.c:76
#define M_PI
Definition: mathematics.h:46
static uint32_t inverse(uint32_t v)
find multiplicative inverse modulo 2 ^ 32
Definition: asfcrypt.c:35
#define av_malloc_array(a, b)
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:49
av_cold int ff_rdft_init(RDFTContext *s, int nbits, enum RDFTransformType trans)
Set up a real FFT.
Definition: rdft.c:99
const int16_t * tab2
Definition: mace.c:144
static struct @48 * exptab
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:127