/* * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "cpu.h" #include "cpu_internal.h" #include "config.h" #include "opt.h" #include "common.h" #if HAVE_SCHED_GETAFFINITY #define _GNU_SOURCE #include <sched.h> #endif #if HAVE_GETPROCESSAFFINITYMASK #include <windows.h> #endif #if HAVE_SYSCTL #if HAVE_SYS_PARAM_H #include <sys/param.h> #endif #include <sys/types.h> #include <sys/sysctl.h> #endif #if HAVE_SYSCONF #include <unistd.h> #endif static int cpuflags_mask = -1, checked; int av_get_cpu_flags(void) { static int flags; if (checked) return flags; if (ARCH_ARM) flags = ff_get_cpu_flags_arm(); if (ARCH_PPC) flags = ff_get_cpu_flags_ppc(); if (ARCH_X86) flags = ff_get_cpu_flags_x86(); flags &= cpuflags_mask; checked = 1; return flags; } void av_set_cpu_flags_mask(int mask) { cpuflags_mask = mask; checked = 0; } int av_parse_cpu_flags(const char *s) { #define CPUFLAG_MMXEXT (AV_CPU_FLAG_MMX | AV_CPU_FLAG_MMXEXT | AV_CPU_FLAG_CMOV) #define CPUFLAG_3DNOW (AV_CPU_FLAG_3DNOW | AV_CPU_FLAG_MMX) #define CPUFLAG_3DNOWEXT (AV_CPU_FLAG_3DNOWEXT | CPUFLAG_3DNOW) #define CPUFLAG_SSE (AV_CPU_FLAG_SSE | CPUFLAG_MMXEXT) #define CPUFLAG_SSE2 (AV_CPU_FLAG_SSE2 | CPUFLAG_SSE) #define CPUFLAG_SSE2SLOW (AV_CPU_FLAG_SSE2SLOW | CPUFLAG_SSE2) #define CPUFLAG_SSE3 (AV_CPU_FLAG_SSE3 | CPUFLAG_SSE2) #define CPUFLAG_SSE3SLOW (AV_CPU_FLAG_SSE3SLOW | CPUFLAG_SSE3) #define CPUFLAG_SSSE3 (AV_CPU_FLAG_SSSE3 | CPUFLAG_SSE3) #define CPUFLAG_SSE4 (AV_CPU_FLAG_SSE4 | CPUFLAG_SSSE3) #define CPUFLAG_SSE42 (AV_CPU_FLAG_SSE42 | CPUFLAG_SSE4) #define CPUFLAG_AVX (AV_CPU_FLAG_AVX | CPUFLAG_SSE42) #define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX) #define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX) static const AVOption cpuflags_opts[] = { { "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" }, #if ARCH_PPC { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC }, .unit = "flags" }, #elif ARCH_X86 { "mmx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" }, { "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_MMXEXT }, .unit = "flags" }, { "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE }, .unit = "flags" }, { "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2 }, .unit = "flags" }, { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2SLOW }, .unit = "flags" }, { "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3 }, .unit = "flags" }, { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3SLOW }, .unit = "flags" }, { "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSSE3 }, .unit = "flags" }, { "atom" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM }, .unit = "flags" }, { "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE4 }, .unit = "flags" }, { "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE42 }, .unit = "flags" }, { "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX }, .unit = "flags" }, { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" }, { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" }, { "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOW }, .unit = "flags" }, { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOWEXT }, .unit = "flags" }, { "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" }, #elif ARCH_ARM { "armv5te", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE }, .unit = "flags" }, { "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" }, { "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" }, { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" }, { "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" }, { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" }, #endif { NULL }, }; static const AVClass class = { .class_name = "cpuflags", .item_name = av_default_item_name, .option = cpuflags_opts, .version = LIBAVUTIL_VERSION_INT, }; int flags = 0, ret; const AVClass *pclass = &class; if ((ret = av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, &flags)) < 0) return ret; return flags & INT_MAX; } int av_cpu_count(void) { int nb_cpus = 1; #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT) cpu_set_t cpuset; CPU_ZERO(&cpuset); if (!sched_getaffinity(0, sizeof(cpuset), &cpuset)) nb_cpus = CPU_COUNT(&cpuset); #elif HAVE_GETPROCESSAFFINITYMASK DWORD_PTR proc_aff, sys_aff; if (GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff)) nb_cpus = av_popcount64(proc_aff); #elif HAVE_SYSCTL && defined(HW_NCPU) int mib[2] = { CTL_HW, HW_NCPU }; size_t len = sizeof(nb_cpus); if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1) nb_cpus = 0; #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN) nb_cpus = sysconf(_SC_NPROC_ONLN); #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN) nb_cpus = sysconf(_SC_NPROCESSORS_ONLN); #endif return nb_cpus; } #ifdef TEST #include <stdio.h> static const struct { int flag; const char *name; } cpu_flag_tab[] = { #if ARCH_ARM { AV_CPU_FLAG_ARMV5TE, "armv5te" }, { AV_CPU_FLAG_ARMV6, "armv6" }, { AV_CPU_FLAG_ARMV6T2, "armv6t2" }, { AV_CPU_FLAG_VFP, "vfp" }, { AV_CPU_FLAG_VFPV3, "vfpv3" }, { AV_CPU_FLAG_NEON, "neon" }, #elif ARCH_PPC { AV_CPU_FLAG_ALTIVEC, "altivec" }, #elif ARCH_X86 { AV_CPU_FLAG_MMX, "mmx" }, { AV_CPU_FLAG_MMXEXT, "mmxext" }, { AV_CPU_FLAG_SSE, "sse" }, { AV_CPU_FLAG_SSE2, "sse2" }, { AV_CPU_FLAG_SSE2SLOW, "sse2(slow)" }, { AV_CPU_FLAG_SSE3, "sse3" }, { AV_CPU_FLAG_SSE3SLOW, "sse3(slow)" }, { AV_CPU_FLAG_SSSE3, "ssse3" }, { AV_CPU_FLAG_ATOM, "atom" }, { AV_CPU_FLAG_SSE4, "sse4.1" }, { AV_CPU_FLAG_SSE42, "sse4.2" }, { AV_CPU_FLAG_AVX, "avx" }, { AV_CPU_FLAG_XOP, "xop" }, { AV_CPU_FLAG_FMA4, "fma4" }, { AV_CPU_FLAG_3DNOW, "3dnow" }, { AV_CPU_FLAG_3DNOWEXT, "3dnowext" }, { AV_CPU_FLAG_CMOV, "cmov" }, #endif { 0 } }; int main(void) { int cpu_flags = av_get_cpu_flags(); int i; printf("cpu_flags = 0x%08X\n", cpu_flags); printf("cpu_flags ="); for (i = 0; cpu_flag_tab[i].flag; i++) if (cpu_flags & cpu_flag_tab[i].flag) printf(" %s", cpu_flag_tab[i].name); printf("\n"); return 0; } #endif