FFmpeg
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 "config.h"
20 
21 #if HAVE_SCHED_GETAFFINITY
22 #ifndef _GNU_SOURCE
23 # define _GNU_SOURCE
24 #endif
25 #include <sched.h>
26 #endif
27 
28 #include <stddef.h>
29 #include <stdint.h>
30 #include <stdatomic.h>
31 
32 #include "attributes.h"
33 #include "cpu.h"
34 #include "cpu_internal.h"
35 #include "opt.h"
36 #include "common.h"
37 
38 #if HAVE_GETPROCESSAFFINITYMASK || HAVE_WINRT
39 #include <windows.h>
40 #endif
41 #if HAVE_SYSCTL
42 #if HAVE_SYS_PARAM_H
43 #include <sys/param.h>
44 #endif
45 #include <sys/types.h>
46 #include <sys/sysctl.h>
47 #endif
48 #if HAVE_UNISTD_H
49 #include <unistd.h>
50 #endif
51 
52 static atomic_int cpu_flags = ATOMIC_VAR_INIT(-1);
53 static atomic_int cpu_count = ATOMIC_VAR_INIT(-1);
54 
55 static int get_cpu_flags(void)
56 {
57 #if ARCH_MIPS
58  return ff_get_cpu_flags_mips();
59 #elif ARCH_AARCH64
60  return ff_get_cpu_flags_aarch64();
61 #elif ARCH_ARM
62  return ff_get_cpu_flags_arm();
63 #elif ARCH_PPC
64  return ff_get_cpu_flags_ppc();
65 #elif ARCH_X86
66  return ff_get_cpu_flags_x86();
67 #elif ARCH_LOONGARCH
68  return ff_get_cpu_flags_loongarch();
69 #endif
70  return 0;
71 }
72 
73 void av_force_cpu_flags(int arg){
74  if (ARCH_X86 &&
75  (arg & ( AV_CPU_FLAG_3DNOW |
76  AV_CPU_FLAG_3DNOWEXT |
77  AV_CPU_FLAG_MMXEXT |
78  AV_CPU_FLAG_SSE |
79  AV_CPU_FLAG_SSE2 |
80  AV_CPU_FLAG_SSE2SLOW |
81  AV_CPU_FLAG_SSE3 |
82  AV_CPU_FLAG_SSE3SLOW |
83  AV_CPU_FLAG_SSSE3 |
84  AV_CPU_FLAG_SSE4 |
85  AV_CPU_FLAG_SSE42 |
86  AV_CPU_FLAG_AVX |
87  AV_CPU_FLAG_AVXSLOW |
88  AV_CPU_FLAG_XOP |
89  AV_CPU_FLAG_FMA3 |
90  AV_CPU_FLAG_FMA4 |
91  AV_CPU_FLAG_AVX2 |
92  AV_CPU_FLAG_AVX512 ))
93  && !(arg & AV_CPU_FLAG_MMX)) {
94  av_log(NULL, AV_LOG_WARNING, "MMX implied by specified flags\n");
95  arg |= AV_CPU_FLAG_MMX;
96  }
97 
98  atomic_store_explicit(&cpu_flags, arg, memory_order_relaxed);
99 }
100 
101 int av_get_cpu_flags(void)
102 {
103  int flags = atomic_load_explicit(&cpu_flags, memory_order_relaxed);
104  if (flags == -1) {
105  flags = get_cpu_flags();
106  atomic_store_explicit(&cpu_flags, flags, memory_order_relaxed);
107  }
108  return flags;
109 }
110 
111 int av_parse_cpu_caps(unsigned *flags, const char *s)
112 {
113  static const AVOption cpuflags_opts[] = {
114  { "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
115 #if ARCH_PPC
116  { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC }, .unit = "flags" },
117 #elif ARCH_X86
118  { "mmx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
119  { "mmx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" },
120  { "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" },
121  { "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE }, .unit = "flags" },
122  { "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2 }, .unit = "flags" },
123  { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2SLOW }, .unit = "flags" },
124  { "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3 }, .unit = "flags" },
125  { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3SLOW }, .unit = "flags" },
126  { "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSSE3 }, .unit = "flags" },
127  { "atom" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM }, .unit = "flags" },
128  { "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE4 }, .unit = "flags" },
129  { "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE42 }, .unit = "flags" },
130  { "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX }, .unit = "flags" },
131  { "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVXSLOW }, .unit = "flags" },
132  { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_XOP }, .unit = "flags" },
133  { "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA3 }, .unit = "flags" },
134  { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA4 }, .unit = "flags" },
135  { "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX2 }, .unit = "flags" },
136  { "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1 }, .unit = "flags" },
137  { "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI2 }, .unit = "flags" },
138  { "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOW }, .unit = "flags" },
139  { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOWEXT }, .unit = "flags" },
140  { "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" },
141  { "aesni", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AESNI }, .unit = "flags" },
142  { "avx512" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX512 }, .unit = "flags" },
143  { "avx512icl", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX512ICL }, .unit = "flags" },
144  { "slowgather", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SLOW_GATHER }, .unit = "flags" },
145 
146 #define CPU_FLAG_P2 AV_CPU_FLAG_CMOV | AV_CPU_FLAG_MMX
147 #define CPU_FLAG_P3 CPU_FLAG_P2 | AV_CPU_FLAG_MMX2 | AV_CPU_FLAG_SSE
148 #define CPU_FLAG_P4 CPU_FLAG_P3| AV_CPU_FLAG_SSE2
149  { "pentium2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P2 }, .unit = "flags" },
150  { "pentium3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P3 }, .unit = "flags" },
151  { "pentium4", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P4 }, .unit = "flags" },
152 
153 #define CPU_FLAG_K62 AV_CPU_FLAG_MMX | AV_CPU_FLAG_3DNOW
154 #define CPU_FLAG_ATHLON CPU_FLAG_K62 | AV_CPU_FLAG_CMOV | AV_CPU_FLAG_3DNOWEXT | AV_CPU_FLAG_MMX2
155 #define CPU_FLAG_ATHLONXP CPU_FLAG_ATHLON | AV_CPU_FLAG_SSE
156 #define CPU_FLAG_K8 CPU_FLAG_ATHLONXP | AV_CPU_FLAG_SSE2
157  { "k6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
158  { "k62", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K62 }, .unit = "flags" },
159  { "athlon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLON }, .unit = "flags" },
160  { "athlonxp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLONXP }, .unit = "flags" },
161  { "k8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K8 }, .unit = "flags" },
162 #elif ARCH_ARM
163  { "armv5te", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE }, .unit = "flags" },
164  { "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" },
165  { "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" },
166  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
167  { "vfp_vm", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP_VM }, .unit = "flags" },
168  { "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" },
169  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
170  { "setend", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SETEND }, .unit = "flags" },
171 #elif ARCH_AARCH64
172  { "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" },
173  { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
174  { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
175 #elif ARCH_MIPS
176  { "mmi", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMI }, .unit = "flags" },
177  { "msa", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MSA }, .unit = "flags" },
178 #elif ARCH_LOONGARCH
179  { "lsx", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_LSX }, .unit = "flags" },
180  { "lasx", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_LASX }, .unit = "flags" },
181 #endif
182  { NULL },
183  };
184  static const AVClass class = {
185  .class_name = "cpuflags",
186  .item_name = av_default_item_name,
187  .option = cpuflags_opts,
188  .version = LIBAVUTIL_VERSION_INT,
189  };
190  const AVClass *pclass = &class;
191 
192  return av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, flags);
193 }
194 
195 int av_cpu_count(void)
196 {
197  static atomic_int printed = ATOMIC_VAR_INIT(0);
198 
199  int nb_cpus = 1;
200  int count = 0;
201 #if HAVE_WINRT
202  SYSTEM_INFO sysinfo;
203 #endif
204 #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
205  cpu_set_t cpuset;
206 
207  CPU_ZERO(&cpuset);
208 
209  if (!sched_getaffinity(0, sizeof(cpuset), &cpuset))
210  nb_cpus = CPU_COUNT(&cpuset);
211 #elif HAVE_GETPROCESSAFFINITYMASK
212  DWORD_PTR proc_aff, sys_aff;
213  if (GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff))
214  nb_cpus = av_popcount64(proc_aff);
215 #elif HAVE_SYSCTL && defined(HW_NCPUONLINE)
216  int mib[2] = { CTL_HW, HW_NCPUONLINE };
217  size_t len = sizeof(nb_cpus);
218 
219  if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1)
220  nb_cpus = 0;
221 #elif HAVE_SYSCTL && defined(HW_NCPU)
222  int mib[2] = { CTL_HW, HW_NCPU };
223  size_t len = sizeof(nb_cpus);
224 
225  if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1)
226  nb_cpus = 0;
227 #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
228  nb_cpus = sysconf(_SC_NPROC_ONLN);
229 #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
230  nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
231 #elif HAVE_WINRT
232  GetNativeSystemInfo(&sysinfo);
233  nb_cpus = sysinfo.dwNumberOfProcessors;
234 #endif
235 
236  if (!atomic_exchange_explicit(&printed, 1, memory_order_relaxed))
237  av_log(NULL, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
238 
239  count = atomic_load_explicit(&cpu_count, memory_order_relaxed);
240 
241  if (count > 0) {
242  nb_cpus = count;
243  av_log(NULL, AV_LOG_DEBUG, "overriding to %d logical cores\n", nb_cpus);
244  }
245 
246  return nb_cpus;
247 }
248 
249 void av_cpu_force_count(int count)
250 {
251  atomic_store_explicit(&cpu_count, count, memory_order_relaxed);
252 }
253 
254 size_t av_cpu_max_align(void)
255 {
256 #if ARCH_MIPS
257  return ff_get_cpu_max_align_mips();
258 #elif ARCH_AARCH64
259  return ff_get_cpu_max_align_aarch64();
260 #elif ARCH_ARM
261  return ff_get_cpu_max_align_arm();
262 #elif ARCH_PPC
263  return ff_get_cpu_max_align_ppc();
264 #elif ARCH_X86
265  return ff_get_cpu_max_align_x86();
266 #elif ARCH_LOONGARCH
267  return ff_get_cpu_max_align_loongarch();
268 #endif
269 
270  return 8;
271 }
AV_CPU_FLAG_VFP
#define AV_CPU_FLAG_VFP
Definition: cpu.h:67
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:73
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AV_CPU_FLAG_SSE3
#define AV_CPU_FLAG_SSE3
Prescott SSE3 functions.
Definition: cpu.h:38
opt.h
cpu_count
static atomic_int cpu_count
Definition: cpu.c:53
av_cpu_force_count
void av_cpu_force_count(int count)
Overrides cpu count detection and forces the specified count.
Definition: cpu.c:249
AV_CPU_FLAG_LSX
#define AV_CPU_FLAG_LSX
Definition: cpu.h:78
av_popcount64
#define av_popcount64
Definition: common.h:152
AV_CPU_FLAG_SSE3SLOW
#define AV_CPU_FLAG_SSE3SLOW
SSE3 supported, but usually not faster.
Definition: cpu.h:39
ff_get_cpu_flags_arm
int ff_get_cpu_flags_arm(void)
Definition: cpu.c:167
AV_CPU_FLAG_3DNOW
#define AV_CPU_FLAG_3DNOW
AMD 3DNOW.
Definition: cpu.h:32
ff_get_cpu_max_align_loongarch
size_t ff_get_cpu_max_align_loongarch(void)
Definition: cpu.c:59
AVOption
AVOption.
Definition: opt.h:251
ATOMIC_VAR_INIT
#define ATOMIC_VAR_INIT(value)
Definition: stdatomic.h:31
atomic_int
intptr_t atomic_int
Definition: stdatomic.h:55
ff_get_cpu_flags_loongarch
int ff_get_cpu_flags_loongarch(void)
Definition: cpu.c:49
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:101
AV_CPU_FLAG_BMI1
#define AV_CPU_FLAG_BMI1
Bit Manipulation Instruction Set 1.
Definition: cpu.h:54
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:52
AV_CPU_FLAG_SSSE3
#define AV_CPU_FLAG_SSSE3
Conroe SSSE3 functions.
Definition: cpu.h:41
AV_CPU_FLAG_XOP
#define AV_CPU_FLAG_XOP
Bulldozer XOP functions.
Definition: cpu.h:49
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:111
AV_CPU_FLAG_3DNOWEXT
#define AV_CPU_FLAG_3DNOWEXT
AMD 3DNowExt.
Definition: cpu.h:37
AV_CPU_FLAG_SLOW_GATHER
#define AV_CPU_FLAG_SLOW_GATHER
CPU has slow gathers.
Definition: cpu.h:58
AV_CPU_FLAG_AVX512
#define AV_CPU_FLAG_AVX512
AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used.
Definition: cpu.h:56
ff_get_cpu_max_align_x86
size_t ff_get_cpu_max_align_x86(void)
Definition: cpu.c:257
cpu_internal.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
AV_CPU_FLAG_ARMV6
#define AV_CPU_FLAG_ARMV6
Definition: cpu.h:65
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ff_get_cpu_max_align_mips
size_t ff_get_cpu_max_align_mips(void)
Definition: cpu.c:119
ff_get_cpu_max_align_aarch64
size_t ff_get_cpu_max_align_aarch64(void)
Definition: cpu.c:30
AV_CPU_FLAG_SSE4
#define AV_CPU_FLAG_SSE4
Penryn SSE4.1 functions.
Definition: cpu.h:44
arg
const char * arg
Definition: jacosubdec.c:67
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
AV_CPU_FLAG_LASX
#define AV_CPU_FLAG_LASX
Definition: cpu.h:79
AV_CPU_FLAG_AVX512ICL
#define AV_CPU_FLAG_AVX512ICL
F/CD/BW/DQ/VL/VNNI/IFMA/VBMI/VBMI2/VPOPCNTDQ/BITALG/GFNI/VAES/VPCLMULQDQ.
Definition: cpu.h:57
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
AV_CPU_FLAG_MSA
#define AV_CPU_FLAG_MSA
Definition: cpu.h:75
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:254
ff_get_cpu_flags_aarch64
int ff_get_cpu_flags_aarch64(void)
Definition: cpu.c:23
AV_CPU_FLAG_CMOV
#define AV_CPU_FLAG_CMOV
supports cmov instruction
Definition: cpu.h:51
AV_CPU_FLAG_ALTIVEC
#define AV_CPU_FLAG_ALTIVEC
standard
Definition: cpu.h:60
atomic_load_explicit
#define atomic_load_explicit(object, order)
Definition: stdatomic.h:96
av_cpu_count
int av_cpu_count(void)
Definition: cpu.c:195
AV_CPU_FLAG_SSE2
#define AV_CPU_FLAG_SSE2
PIV SSE2 functions.
Definition: cpu.h:34
AV_CPU_FLAG_SETEND
#define AV_CPU_FLAG_SETEND
Definition: cpu.h:72
AV_CPU_FLAG_AVXSLOW
#define AV_CPU_FLAG_AVXSLOW
AVX supported, but slow when using YMM registers (e.g. Bulldozer)
Definition: cpu.h:48
AV_CPU_FLAG_AVX
#define AV_CPU_FLAG_AVX
AVX functions: requires OS support even if YMM registers aren't used.
Definition: cpu.h:47
AV_CPU_FLAG_FMA4
#define AV_CPU_FLAG_FMA4
Bulldozer FMA4 functions.
Definition: cpu.h:50
cpu.h
AV_CPU_FLAG_AVX2
#define AV_CPU_FLAG_AVX2
AVX2 functions: requires OS support even if YMM registers aren't used.
Definition: cpu.h:52
AV_CPU_FLAG_SSE2SLOW
#define AV_CPU_FLAG_SSE2SLOW
SSE2 supported, but usually not faster.
Definition: cpu.h:35
AV_CPU_FLAG_NEON
#define AV_CPU_FLAG_NEON
Definition: cpu.h:69
AV_CPU_FLAG_FMA3
#define AV_CPU_FLAG_FMA3
Haswell FMA3 functions.
Definition: cpu.h:53
attributes.h
AV_CPU_FLAG_MMX2
#define AV_CPU_FLAG_MMX2
SSE integer functions or AMD MMX ext.
Definition: cpu.h:31
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_CPU_FLAG_SSE42
#define AV_CPU_FLAG_SSE42
Nehalem SSE4.2 functions.
Definition: cpu.h:45
common.h
atomic_store_explicit
#define atomic_store_explicit(object, desired, order)
Definition: stdatomic.h:90
AV_CPU_FLAG_ARMV8
#define AV_CPU_FLAG_ARMV8
Definition: cpu.h:70
len
int len
Definition: vorbis_enc_data.h:426
ff_get_cpu_flags_x86
int ff_get_cpu_flags_x86(void)
Definition: cpu.c:90
get_cpu_flags
static int get_cpu_flags(void)
Definition: cpu.c:55
AV_CPU_FLAG_ATOM
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition: cpu.h:43
av_opt_eval_flags
int av_opt_eval_flags(void *obj, const AVOption *o, const char *val, int *flags_out)
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:71
AV_CPU_FLAG_VFPV3
#define AV_CPU_FLAG_VFPV3
Definition: cpu.h:68
ff_get_cpu_max_align_arm
size_t ff_get_cpu_max_align_arm(void)
Definition: cpu.c:180
AV_CPU_FLAG_ARMV5TE
#define AV_CPU_FLAG_ARMV5TE
Definition: cpu.h:64
AV_CPU_FLAG_MMX
#define AV_CPU_FLAG_MMX
standard MMX
Definition: cpu.h:29
AV_CPU_FLAG_AESNI
#define AV_CPU_FLAG_AESNI
Advanced Encryption Standard functions.
Definition: cpu.h:46
atomic_exchange_explicit
#define atomic_exchange_explicit(object, desired, order)
Definition: stdatomic.h:106
AV_CPU_FLAG_SSE
#define AV_CPU_FLAG_SSE
SSE functions.
Definition: cpu.h:33
ff_get_cpu_flags_mips
int ff_get_cpu_flags_mips(void)
Definition: cpu.c:106
AV_CPU_FLAG_MMXEXT
#define AV_CPU_FLAG_MMXEXT
SSE integer functions or AMD MMX ext.
Definition: cpu.h:30
ff_get_cpu_max_align_ppc
size_t ff_get_cpu_max_align_ppc(void)
Definition: cpu.c:152
AV_CPU_FLAG_BMI2
#define AV_CPU_FLAG_BMI2
Bit Manipulation Instruction Set 2.
Definition: cpu.h:55
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:71
AV_CPU_FLAG_MMI
#define AV_CPU_FLAG_MMI
Definition: cpu.h:74
AV_OPT_TYPE_FLAGS
@ AV_OPT_TYPE_FLAGS
Definition: opt.h:224
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
AV_CPU_FLAG_ARMV6T2
#define AV_CPU_FLAG_ARMV6T2
Definition: cpu.h:66
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