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cpu.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include <stdint.h>
20 
21 #include "cpu.h"
22 #include "cpu_internal.h"
23 #include "config.h"
24 #include "opt.h"
25 #include "common.h"
26 
27 #if HAVE_SCHED_GETAFFINITY
28 #ifndef _GNU_SOURCE
29 # define _GNU_SOURCE
30 #endif
31 #include <sched.h>
32 #endif
33 #if HAVE_GETPROCESSAFFINITYMASK
34 #include <windows.h>
35 #endif
36 #if HAVE_SYSCTL
37 #if HAVE_SYS_PARAM_H
38 #include <sys/param.h>
39 #endif
40 #include <sys/types.h>
41 #include <sys/sysctl.h>
42 #endif
43 #if HAVE_UNISTD_H
44 #include <unistd.h>
45 #endif
46 
47 static int flags, checked;
48 
49 void av_force_cpu_flags(int arg){
50  if ( (arg & ( AV_CPU_FLAG_3DNOW |
51  AV_CPU_FLAG_3DNOWEXT |
52  AV_CPU_FLAG_MMXEXT |
53  AV_CPU_FLAG_SSE |
54  AV_CPU_FLAG_SSE2 |
55  AV_CPU_FLAG_SSE2SLOW |
56  AV_CPU_FLAG_SSE3 |
57  AV_CPU_FLAG_SSE3SLOW |
58  AV_CPU_FLAG_SSSE3 |
59  AV_CPU_FLAG_SSE4 |
60  AV_CPU_FLAG_SSE42 |
61  AV_CPU_FLAG_AVX |
62  AV_CPU_FLAG_AVXSLOW |
63  AV_CPU_FLAG_XOP |
64  AV_CPU_FLAG_FMA3 |
65  AV_CPU_FLAG_FMA4 |
66  AV_CPU_FLAG_AVX2 ))
67  && !(arg & AV_CPU_FLAG_MMX)) {
68  av_log(NULL, AV_LOG_WARNING, "MMX implied by specified flags\n");
69  arg |= AV_CPU_FLAG_MMX;
70  }
71 
72  flags = arg;
73  checked = arg != -1;
74 }
75 
76 int av_get_cpu_flags(void)
77 {
78  if (checked)
79  return flags;
80 
81  if (ARCH_AARCH64)
82  flags = ff_get_cpu_flags_aarch64();
83  if (ARCH_ARM)
84  flags = ff_get_cpu_flags_arm();
85  if (ARCH_PPC)
86  flags = ff_get_cpu_flags_ppc();
87  if (ARCH_X86)
88  flags = ff_get_cpu_flags_x86();
89 
90  checked = 1;
91  return flags;
92 }
93 
94 void av_set_cpu_flags_mask(int mask)
95 {
96  checked = 0;
97  flags = av_get_cpu_flags() & mask;
98  checked = 1;
99 }
100 
101 int av_parse_cpu_flags(const char *s)
102 {
103 #define CPUFLAG_MMXEXT (AV_CPU_FLAG_MMX | AV_CPU_FLAG_MMXEXT | AV_CPU_FLAG_CMOV)
104 #define CPUFLAG_3DNOW (AV_CPU_FLAG_3DNOW | AV_CPU_FLAG_MMX)
105 #define CPUFLAG_3DNOWEXT (AV_CPU_FLAG_3DNOWEXT | CPUFLAG_3DNOW)
106 #define CPUFLAG_SSE (AV_CPU_FLAG_SSE | CPUFLAG_MMXEXT)
107 #define CPUFLAG_SSE2 (AV_CPU_FLAG_SSE2 | CPUFLAG_SSE)
108 #define CPUFLAG_SSE2SLOW (AV_CPU_FLAG_SSE2SLOW | CPUFLAG_SSE2)
109 #define CPUFLAG_SSE3 (AV_CPU_FLAG_SSE3 | CPUFLAG_SSE2)
110 #define CPUFLAG_SSE3SLOW (AV_CPU_FLAG_SSE3SLOW | CPUFLAG_SSE3)
111 #define CPUFLAG_SSSE3 (AV_CPU_FLAG_SSSE3 | CPUFLAG_SSE3)
112 #define CPUFLAG_SSE4 (AV_CPU_FLAG_SSE4 | CPUFLAG_SSSE3)
113 #define CPUFLAG_SSE42 (AV_CPU_FLAG_SSE42 | CPUFLAG_SSE4)
114 #define CPUFLAG_AVX (AV_CPU_FLAG_AVX | CPUFLAG_SSE42)
115 #define CPUFLAG_AVXSLOW (AV_CPU_FLAG_AVXSLOW | CPUFLAG_AVX)
116 #define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX)
117 #define CPUFLAG_FMA3 (AV_CPU_FLAG_FMA3 | CPUFLAG_AVX)
118 #define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX)
119 #define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX)
120 #define CPUFLAG_BMI2 (AV_CPU_FLAG_BMI2 | AV_CPU_FLAG_BMI1)
121  static const AVOption cpuflags_opts[] = {
122  { "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
123 #if ARCH_PPC
124  { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC }, .unit = "flags" },
125 #elif ARCH_X86
126  { "mmx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
127  { "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_MMXEXT }, .unit = "flags" },
128  { "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE }, .unit = "flags" },
129  { "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2 }, .unit = "flags" },
130  { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2SLOW }, .unit = "flags" },
131  { "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3 }, .unit = "flags" },
132  { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3SLOW }, .unit = "flags" },
133  { "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSSE3 }, .unit = "flags" },
134  { "atom" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM }, .unit = "flags" },
135  { "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE4 }, .unit = "flags" },
136  { "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE42 }, .unit = "flags" },
137  { "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX }, .unit = "flags" },
138  { "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVXSLOW }, .unit = "flags" },
139  { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" },
140  { "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA3 }, .unit = "flags" },
141  { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" },
142  { "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX2 }, .unit = "flags" },
143  { "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1 }, .unit = "flags" },
144  { "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_BMI2 }, .unit = "flags" },
145  { "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOW }, .unit = "flags" },
146  { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOWEXT }, .unit = "flags" },
147  { "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" },
148 #elif ARCH_ARM
149  { "armv5te", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE }, .unit = "flags" },
150  { "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" },
151  { "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" },
152  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
153  { "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" },
154  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
155 #elif ARCH_AARCH64
156  { "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" },
157  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
158  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
159 #endif
160  { NULL },
161  };
162  static const AVClass class = {
163  .class_name = "cpuflags",
164  .item_name = av_default_item_name,
165  .option = cpuflags_opts,
166  .version = LIBAVUTIL_VERSION_INT,
167  };
168 
169  int flags = 0, ret;
170  const AVClass *pclass = &class;
171 
172  if ((ret = av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, &flags)) < 0)
173  return ret;
174 
175  return flags & INT_MAX;
176 }
177 
178 int av_parse_cpu_caps(unsigned *flags, const char *s)
179 {
180  static const AVOption cpuflags_opts[] = {
181  { "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
182 #if ARCH_PPC
183  { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC }, .unit = "flags" },
184 #elif ARCH_X86
185  { "mmx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
186  { "mmx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" },
187  { "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" },
188  { "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE }, .unit = "flags" },
189  { "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2 }, .unit = "flags" },
190  { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2SLOW }, .unit = "flags" },
191  { "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3 }, .unit = "flags" },
192  { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3SLOW }, .unit = "flags" },
193  { "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSSE3 }, .unit = "flags" },
194  { "atom" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM }, .unit = "flags" },
195  { "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE4 }, .unit = "flags" },
196  { "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE42 }, .unit = "flags" },
197  { "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX }, .unit = "flags" },
198  { "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVXSLOW }, .unit = "flags" },
199  { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_XOP }, .unit = "flags" },
200  { "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA3 }, .unit = "flags" },
201  { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA4 }, .unit = "flags" },
202  { "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX2 }, .unit = "flags" },
203  { "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1 }, .unit = "flags" },
204  { "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI2 }, .unit = "flags" },
205  { "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOW }, .unit = "flags" },
206  { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOWEXT }, .unit = "flags" },
207  { "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" },
208 
209 #define CPU_FLAG_P2 AV_CPU_FLAG_CMOV | AV_CPU_FLAG_MMX
210 #define CPU_FLAG_P3 CPU_FLAG_P2 | AV_CPU_FLAG_MMX2 | AV_CPU_FLAG_SSE
211 #define CPU_FLAG_P4 CPU_FLAG_P3| AV_CPU_FLAG_SSE2
212  { "pentium2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P2 }, .unit = "flags" },
213  { "pentium3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P3 }, .unit = "flags" },
214  { "pentium4", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P4 }, .unit = "flags" },
215 
216 #define CPU_FLAG_K62 AV_CPU_FLAG_MMX | AV_CPU_FLAG_3DNOW
217 #define CPU_FLAG_ATHLON CPU_FLAG_K62 | AV_CPU_FLAG_CMOV | AV_CPU_FLAG_3DNOWEXT | AV_CPU_FLAG_MMX2
218 #define CPU_FLAG_ATHLONXP CPU_FLAG_ATHLON | AV_CPU_FLAG_SSE
219 #define CPU_FLAG_K8 CPU_FLAG_ATHLONXP | AV_CPU_FLAG_SSE2
220  { "k6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
221  { "k62", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K62 }, .unit = "flags" },
222  { "athlon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLON }, .unit = "flags" },
223  { "athlonxp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLONXP }, .unit = "flags" },
224  { "k8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K8 }, .unit = "flags" },
225 #elif ARCH_ARM
226  { "armv5te", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE }, .unit = "flags" },
227  { "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" },
228  { "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" },
229  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
230  { "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" },
231  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
232  { "setend", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SETEND }, .unit = "flags" },
233 #elif ARCH_AARCH64
234  { "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" },
235  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
236  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
237 #endif
238  { NULL },
239  };
240  static const AVClass class = {
241  .class_name = "cpuflags",
242  .item_name = av_default_item_name,
243  .option = cpuflags_opts,
244  .version = LIBAVUTIL_VERSION_INT,
245  };
246  const AVClass *pclass = &class;
247 
248  return av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, flags);
249 }
250 
251 int av_cpu_count(void)
252 {
253  static volatile int printed;
254 
255  int nb_cpus = 1;
256 #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
257  cpu_set_t cpuset;
258 
259  CPU_ZERO(&cpuset);
260 
261  if (!sched_getaffinity(0, sizeof(cpuset), &cpuset))
262  nb_cpus = CPU_COUNT(&cpuset);
263 #elif HAVE_GETPROCESSAFFINITYMASK
264  DWORD_PTR proc_aff, sys_aff;
265  if (GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff))
266  nb_cpus = av_popcount64(proc_aff);
267 #elif HAVE_SYSCTL && defined(HW_NCPU)
268  int mib[2] = { CTL_HW, HW_NCPU };
269  size_t len = sizeof(nb_cpus);
270 
271  if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1)
272  nb_cpus = 0;
273 #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
274  nb_cpus = sysconf(_SC_NPROC_ONLN);
275 #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
276  nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
277 #endif
278 
279  if (!printed) {
280  av_log(NULL, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
281  printed = 1;
282  }
283 
284  return nb_cpus;
285 }
286 
287 #ifdef TEST
288 
289 #include <stdio.h>
290 #include "avstring.h"
291 
292 #if !HAVE_GETOPT
293 #include "compat/getopt.c"
294 #endif
295 
296 static const struct {
297  int flag;
298  const char *name;
299 } cpu_flag_tab[] = {
300 #if ARCH_AARCH64
301  { AV_CPU_FLAG_ARMV8, "armv8" },
302  { AV_CPU_FLAG_NEON, "neon" },
303  { AV_CPU_FLAG_VFP, "vfp" },
304 #elif ARCH_ARM
305  { AV_CPU_FLAG_ARMV5TE, "armv5te" },
306  { AV_CPU_FLAG_ARMV6, "armv6" },
307  { AV_CPU_FLAG_ARMV6T2, "armv6t2" },
308  { AV_CPU_FLAG_VFP, "vfp" },
309  { AV_CPU_FLAG_VFPV3, "vfpv3" },
310  { AV_CPU_FLAG_NEON, "neon" },
311  { AV_CPU_FLAG_SETEND, "setend" },
312 #elif ARCH_PPC
313  { AV_CPU_FLAG_ALTIVEC, "altivec" },
314 #elif ARCH_X86
315  { AV_CPU_FLAG_MMX, "mmx" },
316  { AV_CPU_FLAG_MMXEXT, "mmxext" },
317  { AV_CPU_FLAG_SSE, "sse" },
318  { AV_CPU_FLAG_SSE2, "sse2" },
319  { AV_CPU_FLAG_SSE2SLOW, "sse2slow" },
320  { AV_CPU_FLAG_SSE3, "sse3" },
321  { AV_CPU_FLAG_SSE3SLOW, "sse3slow" },
322  { AV_CPU_FLAG_SSSE3, "ssse3" },
323  { AV_CPU_FLAG_ATOM, "atom" },
324  { AV_CPU_FLAG_SSE4, "sse4.1" },
325  { AV_CPU_FLAG_SSE42, "sse4.2" },
326  { AV_CPU_FLAG_AVX, "avx" },
327  { AV_CPU_FLAG_AVXSLOW, "avxslow" },
328  { AV_CPU_FLAG_XOP, "xop" },
329  { AV_CPU_FLAG_FMA3, "fma3" },
330  { AV_CPU_FLAG_FMA4, "fma4" },
331  { AV_CPU_FLAG_3DNOW, "3dnow" },
332  { AV_CPU_FLAG_3DNOWEXT, "3dnowext" },
333  { AV_CPU_FLAG_CMOV, "cmov" },
334  { AV_CPU_FLAG_AVX2, "avx2" },
335  { AV_CPU_FLAG_BMI1, "bmi1" },
336  { AV_CPU_FLAG_BMI2, "bmi2" },
337 #endif
338  { 0 }
339 };
340 
341 static void print_cpu_flags(int cpu_flags, const char *type)
342 {
343  int i;
344 
345  printf("cpu_flags(%s) = 0x%08X\n", type, cpu_flags);
346  printf("cpu_flags_str(%s) =", type);
347  for (i = 0; cpu_flag_tab[i].flag; i++)
348  if (cpu_flags & cpu_flag_tab[i].flag)
349  printf(" %s", cpu_flag_tab[i].name);
350  printf("\n");
351 }
352 
353 
354 int main(int argc, char **argv)
355 {
356  int cpu_flags_raw = av_get_cpu_flags();
357  int cpu_flags_eff;
358  int cpu_count = av_cpu_count();
359  char threads[5] = "auto";
360  int i;
361 
362  for(i = 0; cpu_flag_tab[i].flag; i++) {
363  unsigned tmp = 0;
364  if (av_parse_cpu_caps(&tmp, cpu_flag_tab[i].name) < 0) {
365  fprintf(stderr, "Table missing %s\n", cpu_flag_tab[i].name);
366  return 4;
367  }
368  }
369 
370  if (cpu_flags_raw < 0)
371  return 1;
372 
373  for (;;) {
374  int c = getopt(argc, argv, "c:t:");
375  if (c == -1)
376  break;
377  switch (c) {
378  case 'c':
379  {
380  unsigned flags = av_get_cpu_flags();
381  if (av_parse_cpu_caps(&flags, optarg) < 0)
382  return 2;
383 
384  av_force_cpu_flags(flags);
385  break;
386  }
387  case 't':
388  {
389  int len = av_strlcpy(threads, optarg, sizeof(threads));
390  if (len >= sizeof(threads)) {
391  fprintf(stderr, "Invalid thread count '%s'\n", optarg);
392  return 2;
393  }
394  }
395  }
396  }
397 
398  cpu_flags_eff = av_get_cpu_flags();
399 
400  if (cpu_flags_eff < 0)
401  return 3;
402 
403  print_cpu_flags(cpu_flags_raw, "raw");
404  print_cpu_flags(cpu_flags_eff, "effective");
405  printf("threads = %s (cpu_count = %d)\n", threads, cpu_count);
406 
407  return 0;
408 }
409 
410 #endif
CPUFLAG_3DNOW
#define CPUFLAG_3DNOW
AV_CPU_FLAG_AVX
#define AV_CPU_FLAG_AVX
AVX functions: requires OS support even if YMM registers aren't used.
Definition: cpu.h:45
NULL
#define NULL
Definition: coverity.c:32
AV_CPU_FLAG_ALTIVEC
#define AV_CPU_FLAG_ALTIVEC
standard
Definition: cpu.h:59
s
const char * s
Definition: avisynth_c.h:631
AVOption
AVOption.
Definition: opt.h:255
av_cpu_count
int av_cpu_count(void)
Definition: cpu.c:251
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
AV_CPU_FLAG_SSE
#define AV_CPU_FLAG_SSE
SSE functions.
Definition: cpu.h:33
CPUFLAG_SSE3
#define CPUFLAG_SSE3
av_set_cpu_flags_mask
void av_set_cpu_flags_mask(int mask)
Set a mask on flags returned by av_get_cpu_flags().
Definition: cpu.c:94
AV_CPU_FLAG_MMX2
#define AV_CPU_FLAG_MMX2
SSE integer functions or AMD MMX ext.
Definition: cpu.h:31
CPUFLAG_SSE4
#define CPUFLAG_SSE4
AV_CPU_FLAG_CMOV
#define AV_CPU_FLAG_CMOV
supports cmov instruction
Definition: cpu.h:50
AV_CPU_FLAG_VFP
#define AV_CPU_FLAG_VFP
Definition: cpu.h:66
AV_OPT_TYPE_FLAGS
Definition: opt.h:222
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
checked
static int checked
Definition: cpu.c:47
AV_OPT_TYPE_CONST
Definition: opt.h:231
opt.h
AVOptions.
CPUFLAG_SSE3SLOW
#define CPUFLAG_SSE3SLOW
AV_CPU_FLAG_FMA3
#define AV_CPU_FLAG_FMA3
Haswell FMA3 functions.
Definition: cpu.h:55
AV_CPU_FLAG_NEON
#define AV_CPU_FLAG_NEON
Definition: cpu.h:68
AV_CPU_FLAG_MMXEXT
#define AV_CPU_FLAG_MMXEXT
SSE integer functions or AMD MMX ext.
Definition: cpu.h:30
ff_get_cpu_flags_ppc
int ff_get_cpu_flags_ppc(void)
This function MAY rely on signal() or fork() in order to make sure AltiVec is present.
Definition: cpu.c:48
av_parse_cpu_flags
int av_parse_cpu_flags(const char *s)
Parse CPU flags from a string.
Definition: cpu.c:101
AV_CPU_FLAG_ATOM
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition: cpu.h:42
AV_CPU_FLAG_AVX2
#define AV_CPU_FLAG_AVX2
AVX2 functions: requires OS support even if YMM registers aren't used.
Definition: cpu.h:54
AV_CPU_FLAG_SSE2SLOW
#define AV_CPU_FLAG_SSE2SLOW
SSE2 supported, but usually not faster.
Definition: cpu.h:35
AV_CPU_FLAG_XOP
#define AV_CPU_FLAG_XOP
Bulldozer XOP functions.
Definition: cpu.h:47
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
flag
int flag
Definition: checkasm.c:76
AV_CPU_FLAG_SSE42
#define AV_CPU_FLAG_SSE42
Nehalem SSE4.2 functions.
Definition: cpu.h:44
AV_CPU_FLAG_SSSE3
#define AV_CPU_FLAG_SSSE3
Conroe SSSE3 functions.
Definition: cpu.h:41
mask
static const uint16_t mask[17]
Definition: lzw.c:38
av_default_item_name
av_default_item_name
Definition: libopenh264enc.c:59
av_opt_eval_flags
int av_opt_eval_flags(void *obj, const AVOption *o, const char *val, int *flags_out)
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
arg
const char * arg
Definition: jacosubdec.c:66
AV_CPU_FLAG_ARMV6T2
#define AV_CPU_FLAG_ARMV6T2
Definition: cpu.h:65
CPUFLAG_SSE
#define CPUFLAG_SSE
av_strlcpy
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
av_parse_cpu_caps
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:178
AV_CPU_FLAG_ARMV5TE
#define AV_CPU_FLAG_ARMV5TE
Definition: cpu.h:63
CPUFLAG_SSE2
#define CPUFLAG_SSE2
AV_CPU_FLAG_SSE3
#define AV_CPU_FLAG_SSE3
Prescott SSE3 functions.
Definition: cpu.h:38
ff_get_cpu_flags_x86
int ff_get_cpu_flags_x86(void)
Definition: cpu.c:90
AV_CPU_FLAG_BMI2
#define AV_CPU_FLAG_BMI2
Bit Manipulation Instruction Set 2.
Definition: cpu.h:57
AV_CPU_FLAG_VFPV3
#define AV_CPU_FLAG_VFPV3
Definition: cpu.h:67
CPUFLAG_BMI2
#define CPUFLAG_BMI2
AV_CPU_FLAG_3DNOW
#define AV_CPU_FLAG_3DNOW
AMD 3DNOW.
Definition: cpu.h:32
AV_CPU_FLAG_ARMV6
#define AV_CPU_FLAG_ARMV6
Definition: cpu.h:64
ff_get_cpu_flags_aarch64
int ff_get_cpu_flags_aarch64(void)
Definition: cpu.c:23
AV_CPU_FLAG_SSE3SLOW
#define AV_CPU_FLAG_SSE3SLOW
SSE3 supported, but usually not faster.
Definition: cpu.h:39
AV_CPU_FLAG_AVXSLOW
#define AV_CPU_FLAG_AVXSLOW
AVX supported, but slow when using YMM registers (e.g. Bulldozer)
Definition: cpu.h:46
CPUFLAG_FMA4
#define CPUFLAG_FMA4
AV_CPU_FLAG_BMI1
#define AV_CPU_FLAG_BMI1
Bit Manipulation Instruction Set 1.
Definition: cpu.h:56
AV_CPU_FLAG_MMX
#define AV_CPU_FLAG_MMX
standard MMX
Definition: cpu.h:29
CPUFLAG_FMA3
#define CPUFLAG_FMA3
getopt
static int getopt(int argc, char *argv[], char *opts)
Definition: getopt.c:41
type
GLint GLenum type
Definition: opengl_enc.c:105
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AV_CPU_FLAG_FMA4
#define AV_CPU_FLAG_FMA4
Bulldozer FMA4 functions.
Definition: cpu.h:48
AV_CPU_FLAG_SSE4
#define AV_CPU_FLAG_SSE4
Penryn SSE4.1 functions.
Definition: cpu.h:43
CPUFLAG_AVXSLOW
#define CPUFLAG_AVXSLOW
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:76
CPUFLAG_SSE2SLOW
#define CPUFLAG_SSE2SLOW
CPUFLAG_XOP
#define CPUFLAG_XOP
flags
static int flags
Definition: cpu.c:47
AV_CPU_FLAG_3DNOWEXT
#define AV_CPU_FLAG_3DNOWEXT
AMD 3DNowExt.
Definition: cpu.h:37
common.h
common internal and external API header
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
AV_CPU_FLAG_ARMV8
#define AV_CPU_FLAG_ARMV8
Definition: cpu.h:69
cpu_internal.h
optarg
static char * optarg
Definition: getopt.c:39
CPUFLAG_AVX2
#define CPUFLAG_AVX2
len
int len
Definition: vorbis_enc_data.h:452
DWORD_PTR
DWORD * DWORD_PTR
Definition: basicDataTypeConversions.h:56
ff_get_cpu_flags_arm
int ff_get_cpu_flags_arm(void)
Definition: cpu.c:145
AV_CPU_FLAG_SETEND
#define AV_CPU_FLAG_SETEND
Definition: cpu.h:70
AV_CPU_FLAG_SSE2
#define AV_CPU_FLAG_SSE2
PIV SSE2 functions.
Definition: cpu.h:34
CPUFLAG_3DNOWEXT
#define CPUFLAG_3DNOWEXT
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:49
main
int main(int argc, char **argv)
Definition: main.c:22
CPUFLAG_MMXEXT
#define CPUFLAG_MMXEXT
CPUFLAG_AVX
#define CPUFLAG_AVX
CPUFLAG_SSE42
#define CPUFLAG_SSE42
CPUFLAG_SSSE3
#define CPUFLAG_SSSE3
name
const char * name
Definition: opengl_enc.c:103
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