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float_dsp.c
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1 /*
2  * Copyright 2005 Balatoni Denes
3  * Copyright 2006 Loren Merritt
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "config.h"
23 #include "attributes.h"
24 #include "float_dsp.h"
25 #include "mem.h"
26 
27 static void vector_fmul_c(float *dst, const float *src0, const float *src1,
28  int len)
29 {
30  int i;
31  for (i = 0; i < len; i++)
32  dst[i] = src0[i] * src1[i];
33 }
34 
35 static void vector_fmac_scalar_c(float *dst, const float *src, float mul,
36  int len)
37 {
38  int i;
39  for (i = 0; i < len; i++)
40  dst[i] += src[i] * mul;
41 }
42 
43 static void vector_fmul_scalar_c(float *dst, const float *src, float mul,
44  int len)
45 {
46  int i;
47  for (i = 0; i < len; i++)
48  dst[i] = src[i] * mul;
49 }
50 
51 static void vector_dmul_scalar_c(double *dst, const double *src, double mul,
52  int len)
53 {
54  int i;
55  for (i = 0; i < len; i++)
56  dst[i] = src[i] * mul;
57 }
58 
59 static void vector_fmul_window_c(float *dst, const float *src0,
60  const float *src1, const float *win, int len)
61 {
62  int i, j;
63 
64  dst += len;
65  win += len;
66  src0 += len;
67 
68  for (i = -len, j = len - 1; i < 0; i++, j--) {
69  float s0 = src0[i];
70  float s1 = src1[j];
71  float wi = win[i];
72  float wj = win[j];
73  dst[i] = s0 * wj - s1 * wi;
74  dst[j] = s0 * wi + s1 * wj;
75  }
76 }
77 
78 static void vector_fmul_add_c(float *dst, const float *src0, const float *src1,
79  const float *src2, int len){
80  int i;
81 
82  for (i = 0; i < len; i++)
83  dst[i] = src0[i] * src1[i] + src2[i];
84 }
85 
86 static void vector_fmul_reverse_c(float *dst, const float *src0,
87  const float *src1, int len)
88 {
89  int i;
90 
91  src1 += len-1;
92  for (i = 0; i < len; i++)
93  dst[i] = src0[i] * src1[-i];
94 }
95 
96 static void butterflies_float_c(float *av_restrict v1, float *av_restrict v2,
97  int len)
98 {
99  int i;
100 
101  for (i = 0; i < len; i++) {
102  float t = v1[i] - v2[i];
103  v1[i] += v2[i];
104  v2[i] = t;
105  }
106 }
107 
108 float avpriv_scalarproduct_float_c(const float *v1, const float *v2, int len)
109 {
110  float p = 0.0;
111  int i;
112 
113  for (i = 0; i < len; i++)
114  p += v1[i] * v2[i];
115 
116  return p;
117 }
118 
120 {
121  fdsp->vector_fmul = vector_fmul_c;
130 
131  if (ARCH_AARCH64)
133  if (ARCH_ARM)
134  ff_float_dsp_init_arm(fdsp);
135  if (ARCH_PPC)
136  ff_float_dsp_init_ppc(fdsp, bit_exact);
137  if (ARCH_X86)
138  ff_float_dsp_init_x86(fdsp);
139  if (ARCH_MIPS)
141 }
142 
144 {
146  if (ret)
147  avpriv_float_dsp_init(ret, bit_exact);
148  return ret;
149 }
150 
151 
152 #ifdef TEST
153 
154 #include <float.h>
155 #include <math.h>
156 #include <stdint.h>
157 #include <stdlib.h>
158 #include <string.h>
159 #if HAVE_UNISTD_H
160 #include <unistd.h> /* for getopt */
161 #endif
162 #if !HAVE_GETOPT
163 #include "compat/getopt.c"
164 #endif
165 
166 #include "common.h"
167 #include "cpu.h"
168 #include "internal.h"
169 #include "lfg.h"
170 #include "log.h"
171 #include "random_seed.h"
172 
173 #define LEN 240
174 
175 static void fill_float_array(AVLFG *lfg, float *a, int len)
176 {
177  int i;
178  double bmg[2], stddev = 10.0, mean = 0.0;
179 
180  for (i = 0; i < len; i += 2) {
181  av_bmg_get(lfg, bmg);
182  a[i] = bmg[0] * stddev + mean;
183  a[i + 1] = bmg[1] * stddev + mean;
184  }
185 }
186 static int compare_floats(const float *a, const float *b, int len,
187  float max_diff)
188 {
189  int i;
190  for (i = 0; i < len; i++) {
191  if (fabsf(a[i] - b[i]) > max_diff) {
192  av_log(NULL, AV_LOG_ERROR, "%d: %- .12f - %- .12f = % .12g\n",
193  i, a[i], b[i], a[i] - b[i]);
194  return -1;
195  }
196  }
197  return 0;
198 }
199 
200 static void fill_double_array(AVLFG *lfg, double *a, int len)
201 {
202  int i;
203  double bmg[2], stddev = 10.0, mean = 0.0;
204 
205  for (i = 0; i < len; i += 2) {
206  av_bmg_get(lfg, bmg);
207  a[i] = bmg[0] * stddev + mean;
208  a[i + 1] = bmg[1] * stddev + mean;
209  }
210 }
211 
212 static int compare_doubles(const double *a, const double *b, int len,
213  double max_diff)
214 {
215  int i;
216 
217  for (i = 0; i < len; i++) {
218  if (fabs(a[i] - b[i]) > max_diff) {
219  av_log(NULL, AV_LOG_ERROR, "%d: %- .12f - %- .12f = % .12g\n",
220  i, a[i], b[i], a[i] - b[i]);
221  return -1;
222  }
223  }
224  return 0;
225 }
226 
227 static int test_vector_fmul(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
228  const float *v1, const float *v2)
229 {
230  LOCAL_ALIGNED(32, float, cdst, [LEN]);
231  LOCAL_ALIGNED(32, float, odst, [LEN]);
232  int ret;
233 
234  cdsp->vector_fmul(cdst, v1, v2, LEN);
235  fdsp->vector_fmul(odst, v1, v2, LEN);
236 
237  if (ret = compare_floats(cdst, odst, LEN, FLT_EPSILON))
238  av_log(NULL, AV_LOG_ERROR, "vector_fmul failed\n");
239 
240  return ret;
241 }
242 
243 #define ARBITRARY_FMAC_SCALAR_CONST 0.005
244 static int test_vector_fmac_scalar(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
245  const float *v1, const float *src0, float scale)
246 {
247  LOCAL_ALIGNED(32, float, cdst, [LEN]);
248  LOCAL_ALIGNED(32, float, odst, [LEN]);
249  int ret;
250 
251  memcpy(cdst, v1, LEN * sizeof(*v1));
252  memcpy(odst, v1, LEN * sizeof(*v1));
253 
254  cdsp->vector_fmac_scalar(cdst, src0, scale, LEN);
255  fdsp->vector_fmac_scalar(odst, src0, scale, LEN);
256 
257  if (ret = compare_floats(cdst, odst, LEN, ARBITRARY_FMAC_SCALAR_CONST))
258  av_log(NULL, AV_LOG_ERROR, "vector_fmac_scalar failed\n");
259 
260  return ret;
261 }
262 
263 static int test_vector_fmul_scalar(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
264  const float *v1, float scale)
265 {
266  LOCAL_ALIGNED(32, float, cdst, [LEN]);
267  LOCAL_ALIGNED(32, float, odst, [LEN]);
268  int ret;
269 
270  cdsp->vector_fmul_scalar(cdst, v1, scale, LEN);
271  fdsp->vector_fmul_scalar(odst, v1, scale, LEN);
272 
273  if (ret = compare_floats(cdst, odst, LEN, FLT_EPSILON))
274  av_log(NULL, AV_LOG_ERROR, "vector_fmul_scalar failed\n");
275 
276  return ret;
277 }
278 
279 static int test_vector_dmul_scalar(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
280  const double *v1, double scale)
281 {
282  LOCAL_ALIGNED(32, double, cdst, [LEN]);
283  LOCAL_ALIGNED(32, double, odst, [LEN]);
284  int ret;
285 
286  cdsp->vector_dmul_scalar(cdst, v1, scale, LEN);
287  fdsp->vector_dmul_scalar(odst, v1, scale, LEN);
288 
289  if (ret = compare_doubles(cdst, odst, LEN, DBL_EPSILON))
290  av_log(NULL, AV_LOG_ERROR, "vector_dmul_scalar failed\n");
291 
292  return ret;
293 }
294 
295 #define ARBITRARY_FMUL_WINDOW_CONST 0.008
296 static int test_vector_fmul_window(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
297  const float *v1, const float *v2, const float *v3)
298 {
299  LOCAL_ALIGNED(32, float, cdst, [LEN]);
300  LOCAL_ALIGNED(32, float, odst, [LEN]);
301  int ret;
302 
303  cdsp->vector_fmul_window(cdst, v1, v2, v3, LEN / 2);
304  fdsp->vector_fmul_window(odst, v1, v2, v3, LEN / 2);
305 
306  if (ret = compare_floats(cdst, odst, LEN, ARBITRARY_FMUL_WINDOW_CONST))
307  av_log(NULL, AV_LOG_ERROR, "vector_fmul_window failed\n");
308 
309  return ret;
310 }
311 
312 #define ARBITRARY_FMUL_ADD_CONST 0.005
313 static int test_vector_fmul_add(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
314  const float *v1, const float *v2, const float *v3)
315 {
316  LOCAL_ALIGNED(32, float, cdst, [LEN]);
317  LOCAL_ALIGNED(32, float, odst, [LEN]);
318  int ret;
319 
320  cdsp->vector_fmul_add(cdst, v1, v2, v3, LEN);
321  fdsp->vector_fmul_add(odst, v1, v2, v3, LEN);
322 
323  if (ret = compare_floats(cdst, odst, LEN, ARBITRARY_FMUL_ADD_CONST))
324  av_log(NULL, AV_LOG_ERROR, "vector_fmul_add failed\n");
325 
326  return ret;
327 }
328 
329 static int test_vector_fmul_reverse(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
330  const float *v1, const float *v2)
331 {
332  LOCAL_ALIGNED(32, float, cdst, [LEN]);
333  LOCAL_ALIGNED(32, float, odst, [LEN]);
334  int ret;
335 
336  cdsp->vector_fmul_reverse(cdst, v1, v2, LEN);
337  fdsp->vector_fmul_reverse(odst, v1, v2, LEN);
338 
339  if (ret = compare_floats(cdst, odst, LEN, FLT_EPSILON))
340  av_log(NULL, AV_LOG_ERROR, "vector_fmul_reverse failed\n");
341 
342  return ret;
343 }
344 
345 static int test_butterflies_float(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
346  const float *v1, const float *v2)
347 {
348  LOCAL_ALIGNED(32, float, cv1, [LEN]);
349  LOCAL_ALIGNED(32, float, cv2, [LEN]);
350  LOCAL_ALIGNED(32, float, ov1, [LEN]);
351  LOCAL_ALIGNED(32, float, ov2, [LEN]);
352  int ret;
353 
354  memcpy(cv1, v1, LEN * sizeof(*v1));
355  memcpy(cv2, v2, LEN * sizeof(*v2));
356  memcpy(ov1, v1, LEN * sizeof(*v1));
357  memcpy(ov2, v2, LEN * sizeof(*v2));
358 
359  cdsp->butterflies_float(cv1, cv2, LEN);
360  fdsp->butterflies_float(ov1, ov2, LEN);
361 
362  if ((ret = compare_floats(cv1, ov1, LEN, FLT_EPSILON)) ||
363  (ret = compare_floats(cv2, ov2, LEN, FLT_EPSILON)))
364  av_log(NULL, AV_LOG_ERROR, "butterflies_float failed\n");
365 
366  return ret;
367 }
368 
369 #define ARBITRARY_SCALARPRODUCT_CONST 0.2
370 static int test_scalarproduct_float(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
371  const float *v1, const float *v2)
372 {
373  float cprod, oprod;
374  int ret;
375 
376  cprod = cdsp->scalarproduct_float(v1, v2, LEN);
377  oprod = fdsp->scalarproduct_float(v1, v2, LEN);
378 
379  if (ret = compare_floats(&cprod, &oprod, 1, ARBITRARY_SCALARPRODUCT_CONST))
380  av_log(NULL, AV_LOG_ERROR, "scalarproduct_float failed\n");
381 
382  return ret;
383 }
384 
385 int main(int argc, char **argv)
386 {
387  int ret = 0, seeded = 0;
388  uint32_t seed;
389  AVFloatDSPContext fdsp, cdsp;
390  AVLFG lfg;
391 
392  LOCAL_ALIGNED(32, float, src0, [LEN]);
393  LOCAL_ALIGNED(32, float, src1, [LEN]);
394  LOCAL_ALIGNED(32, float, src2, [LEN]);
395  LOCAL_ALIGNED(32, double, dbl_src0, [LEN]);
396  LOCAL_ALIGNED(32, double, dbl_src1, [LEN]);
397 
398  for (;;) {
399  int arg = getopt(argc, argv, "s:c:");
400  if (arg == -1)
401  break;
402  switch (arg) {
403  case 's':
404  seed = strtoul(optarg, NULL, 10);
405  seeded = 1;
406  break;
407  case 'c':
408  {
409  int cpuflags = av_get_cpu_flags();
410 
411  if (av_parse_cpu_caps(&cpuflags, optarg) < 0)
412  return 1;
413 
414  av_force_cpu_flags(cpuflags);
415  break;
416  }
417  }
418  }
419  if (!seeded)
420  seed = av_get_random_seed();
421 
422  av_log(NULL, AV_LOG_INFO, "float_dsp-test: %s %u\n", seeded ? "seed" : "random seed", seed);
423 
424  av_lfg_init(&lfg, seed);
425 
426  fill_float_array(&lfg, src0, LEN);
427  fill_float_array(&lfg, src1, LEN);
428  fill_float_array(&lfg, src2, LEN);
429 
430  fill_double_array(&lfg, dbl_src0, LEN);
431  fill_double_array(&lfg, dbl_src1, LEN);
432 
433  avpriv_float_dsp_init(&fdsp, 1);
435  avpriv_float_dsp_init(&cdsp, 1);
436 
437  if (test_vector_fmul(&fdsp, &cdsp, src0, src1))
438  ret -= 1 << 0;
439  if (test_vector_fmac_scalar(&fdsp, &cdsp, src2, src0, src1[0]))
440  ret -= 1 << 1;
441  if (test_vector_fmul_scalar(&fdsp, &cdsp, src0, src1[0]))
442  ret -= 1 << 2;
443  if (test_vector_fmul_window(&fdsp, &cdsp, src0, src1, src2))
444  ret -= 1 << 3;
445  if (test_vector_fmul_add(&fdsp, &cdsp, src0, src1, src2))
446  ret -= 1 << 4;
447  if (test_vector_fmul_reverse(&fdsp, &cdsp, src0, src1))
448  ret -= 1 << 5;
449  if (test_butterflies_float(&fdsp, &cdsp, src0, src1))
450  ret -= 1 << 6;
451  if (test_scalarproduct_float(&fdsp, &cdsp, src0, src1))
452  ret -= 1 << 7;
453  if (test_vector_dmul_scalar(&fdsp, &cdsp, dbl_src0, dbl_src1[0]))
454  ret -= 1 << 8;
455 
456  return ret;
457 }
458 
459 #endif /* TEST */