2 * This file is part of Libav.
4 * Libav 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.
9 * Libav 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.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "cpu_internal.h"
25 #if HAVE_SCHED_GETAFFINITY
29 #if HAVE_GETPROCESSAFFINITYMASK
34 #include <sys/param.h>
36 #include <sys/types.h>
37 #include <sys/sysctl.h>
43 static int cpuflags_mask = -1, checked;
45 int av_get_cpu_flags(void)
52 if (ARCH_ARM) flags = ff_get_cpu_flags_arm();
53 if (ARCH_PPC) flags = ff_get_cpu_flags_ppc();
54 if (ARCH_X86) flags = ff_get_cpu_flags_x86();
56 flags &= cpuflags_mask;
62 void av_set_cpu_flags_mask(int mask)
68 int av_parse_cpu_flags(const char *s)
70 #define CPUFLAG_MMXEXT (AV_CPU_FLAG_MMX | AV_CPU_FLAG_MMXEXT | AV_CPU_FLAG_CMOV)
71 #define CPUFLAG_3DNOW (AV_CPU_FLAG_3DNOW | AV_CPU_FLAG_MMX)
72 #define CPUFLAG_3DNOWEXT (AV_CPU_FLAG_3DNOWEXT | CPUFLAG_3DNOW)
73 #define CPUFLAG_SSE (AV_CPU_FLAG_SSE | CPUFLAG_MMXEXT)
74 #define CPUFLAG_SSE2 (AV_CPU_FLAG_SSE2 | CPUFLAG_SSE)
75 #define CPUFLAG_SSE2SLOW (AV_CPU_FLAG_SSE2SLOW | CPUFLAG_SSE2)
76 #define CPUFLAG_SSE3 (AV_CPU_FLAG_SSE3 | CPUFLAG_SSE2)
77 #define CPUFLAG_SSE3SLOW (AV_CPU_FLAG_SSE3SLOW | CPUFLAG_SSE3)
78 #define CPUFLAG_SSSE3 (AV_CPU_FLAG_SSSE3 | CPUFLAG_SSE3)
79 #define CPUFLAG_SSE4 (AV_CPU_FLAG_SSE4 | CPUFLAG_SSSE3)
80 #define CPUFLAG_SSE42 (AV_CPU_FLAG_SSE42 | CPUFLAG_SSE4)
81 #define CPUFLAG_AVX (AV_CPU_FLAG_AVX | CPUFLAG_SSE42)
82 #define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX)
83 #define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX)
84 #define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX)
85 static const AVOption cpuflags_opts[] = {
86 { "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
88 { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC }, .unit = "flags" },
90 { "mmx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
91 { "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_MMXEXT }, .unit = "flags" },
92 { "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE }, .unit = "flags" },
93 { "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2 }, .unit = "flags" },
94 { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2SLOW }, .unit = "flags" },
95 { "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3 }, .unit = "flags" },
96 { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3SLOW }, .unit = "flags" },
97 { "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSSE3 }, .unit = "flags" },
98 { "atom" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM }, .unit = "flags" },
99 { "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE4 }, .unit = "flags" },
100 { "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE42 }, .unit = "flags" },
101 { "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX }, .unit = "flags" },
102 { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" },
103 { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" },
104 { "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX2 }, .unit = "flags" },
105 { "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOW }, .unit = "flags" },
106 { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOWEXT }, .unit = "flags" },
107 { "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" },
109 { "armv5te", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE }, .unit = "flags" },
110 { "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" },
111 { "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" },
112 { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
113 { "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" },
114 { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
118 static const AVClass class = {
119 .class_name = "cpuflags",
120 .item_name = av_default_item_name,
121 .option = cpuflags_opts,
122 .version = LIBAVUTIL_VERSION_INT,
126 const AVClass *pclass = &class;
128 if ((ret = av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, &flags)) < 0)
131 return flags & INT_MAX;
134 int av_cpu_count(void)
137 #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
142 if (!sched_getaffinity(0, sizeof(cpuset), &cpuset))
143 nb_cpus = CPU_COUNT(&cpuset);
144 #elif HAVE_GETPROCESSAFFINITYMASK
145 DWORD_PTR proc_aff, sys_aff;
146 if (GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff))
147 nb_cpus = av_popcount64(proc_aff);
148 #elif HAVE_SYSCTL && defined(HW_NCPU)
149 int mib[2] = { CTL_HW, HW_NCPU };
150 size_t len = sizeof(nb_cpus);
152 if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1)
154 #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
155 nb_cpus = sysconf(_SC_NPROC_ONLN);
156 #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
157 nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
167 static const struct {
172 { AV_CPU_FLAG_ARMV5TE, "armv5te" },
173 { AV_CPU_FLAG_ARMV6, "armv6" },
174 { AV_CPU_FLAG_ARMV6T2, "armv6t2" },
175 { AV_CPU_FLAG_VFP, "vfp" },
176 { AV_CPU_FLAG_VFPV3, "vfpv3" },
177 { AV_CPU_FLAG_NEON, "neon" },
179 { AV_CPU_FLAG_ALTIVEC, "altivec" },
181 { AV_CPU_FLAG_MMX, "mmx" },
182 { AV_CPU_FLAG_MMXEXT, "mmxext" },
183 { AV_CPU_FLAG_SSE, "sse" },
184 { AV_CPU_FLAG_SSE2, "sse2" },
185 { AV_CPU_FLAG_SSE2SLOW, "sse2(slow)" },
186 { AV_CPU_FLAG_SSE3, "sse3" },
187 { AV_CPU_FLAG_SSE3SLOW, "sse3(slow)" },
188 { AV_CPU_FLAG_SSSE3, "ssse3" },
189 { AV_CPU_FLAG_ATOM, "atom" },
190 { AV_CPU_FLAG_SSE4, "sse4.1" },
191 { AV_CPU_FLAG_SSE42, "sse4.2" },
192 { AV_CPU_FLAG_AVX, "avx" },
193 { AV_CPU_FLAG_XOP, "xop" },
194 { AV_CPU_FLAG_FMA4, "fma4" },
195 { AV_CPU_FLAG_3DNOW, "3dnow" },
196 { AV_CPU_FLAG_3DNOWEXT, "3dnowext" },
197 { AV_CPU_FLAG_CMOV, "cmov" },
198 { AV_CPU_FLAG_AVX2, "avx2" },
205 int cpu_flags = av_get_cpu_flags();
208 printf("cpu_flags = 0x%08X\n", cpu_flags);
209 printf("cpu_flags =");
210 for (i = 0; cpu_flag_tab[i].flag; i++)
211 if (cpu_flags & cpu_flag_tab[i].flag)
212 printf(" %s", cpu_flag_tab[i].name);