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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 <stddef.h>
20 #include <stdint.h>
21 #include <stdatomic.h>
22 
23 #include "attributes.h"
24 #include "cpu.h"
25 #include "cpu_internal.h"
26 #include "config.h"
27 #include "opt.h"
28 #include "common.h"
29 
30 #if HAVE_SCHED_GETAFFINITY
31 #ifndef _GNU_SOURCE
32 # define _GNU_SOURCE
33 #endif
34 #include <sched.h>
35 #endif
36 #if HAVE_GETPROCESSAFFINITYMASK || HAVE_WINRT
37 #include <windows.h>
38 #endif
39 #if HAVE_SYSCTL
40 #if HAVE_SYS_PARAM_H
41 #include <sys/param.h>
42 #endif
43 #include <sys/types.h>
44 #include <sys/sysctl.h>
45 #endif
46 #if HAVE_UNISTD_H
47 #include <unistd.h>
48 #endif
49 
50 static atomic_int cpu_flags = ATOMIC_VAR_INIT(-1);
51 
52 static int get_cpu_flags(void)
53 {
54  if (ARCH_AARCH64)
55  return ff_get_cpu_flags_aarch64();
56  if (ARCH_ARM)
57  return ff_get_cpu_flags_arm();
58  if (ARCH_PPC)
59  return ff_get_cpu_flags_ppc();
60  if (ARCH_X86)
61  return ff_get_cpu_flags_x86();
62  return 0;
63 }
64 
65 void av_force_cpu_flags(int arg){
66  if (ARCH_X86 &&
67  (arg & ( AV_CPU_FLAG_3DNOW |
68  AV_CPU_FLAG_3DNOWEXT |
69  AV_CPU_FLAG_MMXEXT |
70  AV_CPU_FLAG_SSE |
71  AV_CPU_FLAG_SSE2 |
72  AV_CPU_FLAG_SSE2SLOW |
73  AV_CPU_FLAG_SSE3 |
74  AV_CPU_FLAG_SSE3SLOW |
75  AV_CPU_FLAG_SSSE3 |
76  AV_CPU_FLAG_SSE4 |
77  AV_CPU_FLAG_SSE42 |
78  AV_CPU_FLAG_AVX |
79  AV_CPU_FLAG_AVXSLOW |
80  AV_CPU_FLAG_XOP |
81  AV_CPU_FLAG_FMA3 |
82  AV_CPU_FLAG_FMA4 |
83  AV_CPU_FLAG_AVX2 ))
84  && !(arg & AV_CPU_FLAG_MMX)) {
85  av_log(NULL, AV_LOG_WARNING, "MMX implied by specified flags\n");
86  arg |= AV_CPU_FLAG_MMX;
87  }
88 
89  atomic_store_explicit(&cpu_flags, arg, memory_order_relaxed);
90 }
91 
92 int av_get_cpu_flags(void)
93 {
94  int flags = atomic_load_explicit(&cpu_flags, memory_order_relaxed);
95  if (flags == -1) {
96  flags = get_cpu_flags();
97  atomic_store_explicit(&cpu_flags, flags, memory_order_relaxed);
98  }
99  return flags;
100 }
101 
102 void av_set_cpu_flags_mask(int mask)
103 {
104  atomic_store_explicit(&cpu_flags, get_cpu_flags() & mask,
105  memory_order_relaxed);
106 }
107 
108 int av_parse_cpu_flags(const char *s)
109 {
110 #define CPUFLAG_MMXEXT (AV_CPU_FLAG_MMX | AV_CPU_FLAG_MMXEXT | AV_CPU_FLAG_CMOV)
111 #define CPUFLAG_3DNOW (AV_CPU_FLAG_3DNOW | AV_CPU_FLAG_MMX)
112 #define CPUFLAG_3DNOWEXT (AV_CPU_FLAG_3DNOWEXT | CPUFLAG_3DNOW)
113 #define CPUFLAG_SSE (AV_CPU_FLAG_SSE | CPUFLAG_MMXEXT)
114 #define CPUFLAG_SSE2 (AV_CPU_FLAG_SSE2 | CPUFLAG_SSE)
115 #define CPUFLAG_SSE2SLOW (AV_CPU_FLAG_SSE2SLOW | CPUFLAG_SSE2)
116 #define CPUFLAG_SSE3 (AV_CPU_FLAG_SSE3 | CPUFLAG_SSE2)
117 #define CPUFLAG_SSE3SLOW (AV_CPU_FLAG_SSE3SLOW | CPUFLAG_SSE3)
118 #define CPUFLAG_SSSE3 (AV_CPU_FLAG_SSSE3 | CPUFLAG_SSE3)
119 #define CPUFLAG_SSE4 (AV_CPU_FLAG_SSE4 | CPUFLAG_SSSE3)
120 #define CPUFLAG_SSE42 (AV_CPU_FLAG_SSE42 | CPUFLAG_SSE4)
121 #define CPUFLAG_AVX (AV_CPU_FLAG_AVX | CPUFLAG_SSE42)
122 #define CPUFLAG_AVXSLOW (AV_CPU_FLAG_AVXSLOW | CPUFLAG_AVX)
123 #define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX)
124 #define CPUFLAG_FMA3 (AV_CPU_FLAG_FMA3 | CPUFLAG_AVX)
125 #define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX)
126 #define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX)
127 #define CPUFLAG_BMI2 (AV_CPU_FLAG_BMI2 | AV_CPU_FLAG_BMI1)
128 #define CPUFLAG_AESNI (AV_CPU_FLAG_AESNI | CPUFLAG_SSE42)
129  static const AVOption cpuflags_opts[] = {
130  { "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
131 #if ARCH_PPC
132  { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC }, .unit = "flags" },
133 #elif ARCH_X86
134  { "mmx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
135  { "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_MMXEXT }, .unit = "flags" },
136  { "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE }, .unit = "flags" },
137  { "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2 }, .unit = "flags" },
138  { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2SLOW }, .unit = "flags" },
139  { "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3 }, .unit = "flags" },
140  { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3SLOW }, .unit = "flags" },
141  { "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSSE3 }, .unit = "flags" },
142  { "atom" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM }, .unit = "flags" },
143  { "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE4 }, .unit = "flags" },
144  { "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE42 }, .unit = "flags" },
145  { "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX }, .unit = "flags" },
146  { "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVXSLOW }, .unit = "flags" },
147  { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" },
148  { "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA3 }, .unit = "flags" },
149  { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" },
150  { "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX2 }, .unit = "flags" },
151  { "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1 }, .unit = "flags" },
152  { "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_BMI2 }, .unit = "flags" },
153  { "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOW }, .unit = "flags" },
154  { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOWEXT }, .unit = "flags" },
155  { "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" },
156  { "aesni" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AESNI }, .unit = "flags" },
157 #elif ARCH_ARM
158  { "armv5te", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE }, .unit = "flags" },
159  { "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" },
160  { "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" },
161  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
162  { "vfp_vm", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP_VM }, .unit = "flags" },
163  { "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" },
164  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
165 #elif ARCH_AARCH64
166  { "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" },
167  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
168  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
169 #endif
170  { NULL },
171  };
172  static const AVClass class = {
173  .class_name = "cpuflags",
174  .item_name = av_default_item_name,
175  .option = cpuflags_opts,
176  .version = LIBAVUTIL_VERSION_INT,
177  };
178 
179  int flags = 0, ret;
180  const AVClass *pclass = &class;
181 
182  if ((ret = av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, &flags)) < 0)
183  return ret;
184 
185  return flags & INT_MAX;
186 }
187 
188 int av_parse_cpu_caps(unsigned *flags, const char *s)
189 {
190  static const AVOption cpuflags_opts[] = {
191  { "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
192 #if ARCH_PPC
193  { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC }, .unit = "flags" },
194 #elif ARCH_X86
195  { "mmx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
196  { "mmx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" },
197  { "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" },
198  { "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE }, .unit = "flags" },
199  { "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2 }, .unit = "flags" },
200  { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2SLOW }, .unit = "flags" },
201  { "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3 }, .unit = "flags" },
202  { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3SLOW }, .unit = "flags" },
203  { "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSSE3 }, .unit = "flags" },
204  { "atom" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM }, .unit = "flags" },
205  { "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE4 }, .unit = "flags" },
206  { "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE42 }, .unit = "flags" },
207  { "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX }, .unit = "flags" },
208  { "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVXSLOW }, .unit = "flags" },
209  { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_XOP }, .unit = "flags" },
210  { "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA3 }, .unit = "flags" },
211  { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA4 }, .unit = "flags" },
212  { "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX2 }, .unit = "flags" },
213  { "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1 }, .unit = "flags" },
214  { "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI2 }, .unit = "flags" },
215  { "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOW }, .unit = "flags" },
216  { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOWEXT }, .unit = "flags" },
217  { "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" },
218  { "aesni", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AESNI }, .unit = "flags" },
219 
220 #define CPU_FLAG_P2 AV_CPU_FLAG_CMOV | AV_CPU_FLAG_MMX
221 #define CPU_FLAG_P3 CPU_FLAG_P2 | AV_CPU_FLAG_MMX2 | AV_CPU_FLAG_SSE
222 #define CPU_FLAG_P4 CPU_FLAG_P3| AV_CPU_FLAG_SSE2
223  { "pentium2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P2 }, .unit = "flags" },
224  { "pentium3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P3 }, .unit = "flags" },
225  { "pentium4", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P4 }, .unit = "flags" },
226 
227 #define CPU_FLAG_K62 AV_CPU_FLAG_MMX | AV_CPU_FLAG_3DNOW
228 #define CPU_FLAG_ATHLON CPU_FLAG_K62 | AV_CPU_FLAG_CMOV | AV_CPU_FLAG_3DNOWEXT | AV_CPU_FLAG_MMX2
229 #define CPU_FLAG_ATHLONXP CPU_FLAG_ATHLON | AV_CPU_FLAG_SSE
230 #define CPU_FLAG_K8 CPU_FLAG_ATHLONXP | AV_CPU_FLAG_SSE2
231  { "k6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
232  { "k62", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K62 }, .unit = "flags" },
233  { "athlon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLON }, .unit = "flags" },
234  { "athlonxp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLONXP }, .unit = "flags" },
235  { "k8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K8 }, .unit = "flags" },
236 #elif ARCH_ARM
237  { "armv5te", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE }, .unit = "flags" },
238  { "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" },
239  { "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" },
240  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
241  { "vfp_vm", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP_VM }, .unit = "flags" },
242  { "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" },
243  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
244  { "setend", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SETEND }, .unit = "flags" },
245 #elif ARCH_AARCH64
246  { "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" },
247  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
248  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
249 #endif
250  { NULL },
251  };
252  static const AVClass class = {
253  .class_name = "cpuflags",
254  .item_name = av_default_item_name,
255  .option = cpuflags_opts,
256  .version = LIBAVUTIL_VERSION_INT,
257  };
258  const AVClass *pclass = &class;
259 
260  return av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, flags);
261 }
262 
263 int av_cpu_count(void)
264 {
265  static volatile int printed;
266 
267  int nb_cpus = 1;
268 #if HAVE_WINRT
269  SYSTEM_INFO sysinfo;
270 #endif
271 #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
272  cpu_set_t cpuset;
273 
274  CPU_ZERO(&cpuset);
275 
276  if (!sched_getaffinity(0, sizeof(cpuset), &cpuset))
277  nb_cpus = CPU_COUNT(&cpuset);
278 #elif HAVE_GETPROCESSAFFINITYMASK
279  DWORD_PTR proc_aff, sys_aff;
280  if (GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff))
281  nb_cpus = av_popcount64(proc_aff);
282 #elif HAVE_SYSCTL && defined(HW_NCPU)
283  int mib[2] = { CTL_HW, HW_NCPU };
284  size_t len = sizeof(nb_cpus);
285 
286  if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1)
287  nb_cpus = 0;
288 #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
289  nb_cpus = sysconf(_SC_NPROC_ONLN);
290 #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
291  nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
292 #elif HAVE_WINRT
293  GetNativeSystemInfo(&sysinfo);
294  nb_cpus = sysinfo.dwNumberOfProcessors;
295 #endif
296 
297  if (!printed) {
298  av_log(NULL, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
299  printed = 1;
300  }
301 
302  return nb_cpus;
303 }
304 
305 size_t av_cpu_max_align(void)
306 {
307  if (ARCH_AARCH64)
308  return ff_get_cpu_max_align_aarch64();
309  if (ARCH_ARM)
310  return ff_get_cpu_max_align_arm();
311  if (ARCH_PPC)
312  return ff_get_cpu_max_align_ppc();
313  if (ARCH_X86)
314  return ff_get_cpu_max_align_x86();
315 
316  return 8;
317 }
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:49
ATOMIC_VAR_INIT
#define ATOMIC_VAR_INIT(value)
Definition: stdatomic.h:31
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:768
AVOption
AVOption.
Definition: opt.h:246
av_cpu_count
int av_cpu_count(void)
Definition: cpu.c:263
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:86
AV_CPU_FLAG_SSE
#define AV_CPU_FLAG_SSE
SSE functions.
Definition: cpu.h:35
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:102
AV_CPU_FLAG_MMX2
#define AV_CPU_FLAG_MMX2
SSE integer functions or AMD MMX ext.
Definition: cpu.h:33
CPUFLAG_SSE4
#define CPUFLAG_SSE4
AV_CPU_FLAG_CMOV
#define AV_CPU_FLAG_CMOV
supports cmov instruction
Definition: cpu.h:53
AV_CPU_FLAG_VFP
#define AV_CPU_FLAG_VFP
Definition: cpu.h:66
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:50
atomic_int
intptr_t atomic_int
Definition: stdatomic.h:55
AV_OPT_TYPE_FLAGS
Definition: opt.h:222
attributes.h
Macro definitions for various function/variable attributes.
CPUFLAG_AESNI
#define CPUFLAG_AESNI
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
AV_OPT_TYPE_CONST
Definition: opt.h:232
av_cpu_max_align
size_t av_cpu_max_align(void)
Get the maximum data alignment that may be required by FFmpeg.
Definition: cpu.c:305
opt.h
AVOptions.
CPUFLAG_SSE3SLOW
#define CPUFLAG_SSE3SLOW
ff_get_cpu_max_align_x86
size_t ff_get_cpu_max_align_x86(void)
Definition: cpu.c:237
ff_get_cpu_max_align_ppc
size_t ff_get_cpu_max_align_ppc(void)
Definition: cpu.c:152
AV_CPU_FLAG_FMA3
#define AV_CPU_FLAG_FMA3
Haswell FMA3 functions.
Definition: cpu.h:55
ff_get_cpu_max_align_aarch64
size_t ff_get_cpu_max_align_aarch64(void)
Definition: cpu.c:30
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:32
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:108
AV_CPU_FLAG_ATOM
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition: cpu.h:45
flags
static int flags
Definition: log.c:57
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:37
AV_CPU_FLAG_XOP
#define AV_CPU_FLAG_XOP
Bulldozer XOP functions.
Definition: cpu.h:51
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_CPU_FLAG_SSE42
#define AV_CPU_FLAG_SSE42
Nehalem SSE4.2 functions.
Definition: cpu.h:47
AV_CPU_FLAG_SSSE3
#define AV_CPU_FLAG_SSSE3
Conroe SSSE3 functions.
Definition: cpu.h:43
mask
static const uint16_t mask[17]
Definition: lzw.c:38
av_default_item_name
av_default_item_name
Definition: libopenh264enc.c:78
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
AV_CPU_FLAG_VFP_VM
#define AV_CPU_FLAG_VFP_VM
VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations.
Definition: cpu.h:70
CPUFLAG_SSE
#define CPUFLAG_SSE
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:188
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:40
ff_get_cpu_flags_x86
int ff_get_cpu_flags_x86(void)
Definition: cpu.c:90
atomic_load_explicit
#define atomic_load_explicit(object, order)
Definition: stdatomic.h:96
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:34
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:41
AV_CPU_FLAG_AVXSLOW
#define AV_CPU_FLAG_AVXSLOW
AVX supported, but slow when using YMM registers (e.g. Bulldozer)
Definition: cpu.h:50
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:31
CPUFLAG_FMA3
#define CPUFLAG_FMA3
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:52
AV_CPU_FLAG_SSE4
#define AV_CPU_FLAG_SSE4
Penryn SSE4.1 functions.
Definition: cpu.h:46
CPUFLAG_AVXSLOW
#define CPUFLAG_AVXSLOW
AV_CPU_FLAG_AESNI
#define AV_CPU_FLAG_AESNI
Advanced Encryption Standard functions.
Definition: cpu.h:48
atomic_store_explicit
#define atomic_store_explicit(object, desired, order)
Definition: stdatomic.h:90
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:92
CPUFLAG_SSE2SLOW
#define CPUFLAG_SSE2SLOW
CPUFLAG_XOP
#define CPUFLAG_XOP
AV_CPU_FLAG_3DNOWEXT
#define AV_CPU_FLAG_3DNOWEXT
AMD 3DNowExt.
Definition: cpu.h:39
common.h
common internal and external API header
AV_CPU_FLAG_ARMV8
#define AV_CPU_FLAG_ARMV8
Definition: cpu.h:69
cpu_internal.h
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:149
AV_CPU_FLAG_SETEND
#define AV_CPU_FLAG_SETEND
Definition: cpu.h:71
get_cpu_flags
static int get_cpu_flags(void)
Definition: cpu.c:52
AV_CPU_FLAG_SSE2
#define AV_CPU_FLAG_SSE2
PIV SSE2 functions.
Definition: cpu.h:36
CPUFLAG_3DNOWEXT
#define CPUFLAG_3DNOWEXT
ff_get_cpu_max_align_arm
size_t ff_get_cpu_max_align_arm(void)
Definition: cpu.c:162
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:65
CPUFLAG_MMXEXT
#define CPUFLAG_MMXEXT
CPUFLAG_AVX
#define CPUFLAG_AVX
CPUFLAG_SSE42
#define CPUFLAG_SSE42
CPUFLAG_SSSE3
#define CPUFLAG_SSSE3
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