| /* |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <stdatomic.h> |
| |
| #include "attributes.h" |
| #include "cpu.h" |
| #include "cpu_internal.h" |
| #include "config.h" |
| #include "opt.h" |
| #include "common.h" |
| |
| #if HAVE_SCHED_GETAFFINITY |
| #ifndef _GNU_SOURCE |
| # define _GNU_SOURCE |
| #endif |
| #include <sched.h> |
| #endif |
| #if HAVE_GETPROCESSAFFINITYMASK || HAVE_WINRT |
| #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_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| static atomic_int cpu_flags = ATOMIC_VAR_INIT(-1); |
| |
| static int get_cpu_flags(void) |
| { |
| if (ARCH_AARCH64) |
| return ff_get_cpu_flags_aarch64(); |
| if (ARCH_ARM) |
| return ff_get_cpu_flags_arm(); |
| if (ARCH_PPC) |
| return ff_get_cpu_flags_ppc(); |
| if (ARCH_X86) |
| return ff_get_cpu_flags_x86(); |
| return 0; |
| } |
| |
| void av_force_cpu_flags(int arg){ |
| if (ARCH_X86 && |
| (arg & ( AV_CPU_FLAG_3DNOW | |
| AV_CPU_FLAG_3DNOWEXT | |
| AV_CPU_FLAG_MMXEXT | |
| AV_CPU_FLAG_SSE | |
| AV_CPU_FLAG_SSE2 | |
| AV_CPU_FLAG_SSE2SLOW | |
| AV_CPU_FLAG_SSE3 | |
| AV_CPU_FLAG_SSE3SLOW | |
| AV_CPU_FLAG_SSSE3 | |
| AV_CPU_FLAG_SSE4 | |
| AV_CPU_FLAG_SSE42 | |
| AV_CPU_FLAG_AVX | |
| AV_CPU_FLAG_AVXSLOW | |
| AV_CPU_FLAG_XOP | |
| AV_CPU_FLAG_FMA3 | |
| AV_CPU_FLAG_FMA4 | |
| AV_CPU_FLAG_AVX2 )) |
| && !(arg & AV_CPU_FLAG_MMX)) { |
| av_log(NULL, AV_LOG_WARNING, "MMX implied by specified flags\n"); |
| arg |= AV_CPU_FLAG_MMX; |
| } |
| |
| atomic_store_explicit(&cpu_flags, arg, memory_order_relaxed); |
| } |
| |
| int av_get_cpu_flags(void) |
| { |
| int flags = atomic_load_explicit(&cpu_flags, memory_order_relaxed); |
| if (flags == -1) { |
| flags = get_cpu_flags(); |
| atomic_store_explicit(&cpu_flags, flags, memory_order_relaxed); |
| } |
| return flags; |
| } |
| |
| void av_set_cpu_flags_mask(int mask) |
| { |
| atomic_store_explicit(&cpu_flags, get_cpu_flags() & mask, |
| memory_order_relaxed); |
| } |
| |
| 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_AVXSLOW (AV_CPU_FLAG_AVXSLOW | CPUFLAG_AVX) |
| #define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX) |
| #define CPUFLAG_FMA3 (AV_CPU_FLAG_FMA3 | CPUFLAG_AVX) |
| #define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX) |
| #define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX) |
| #define CPUFLAG_BMI2 (AV_CPU_FLAG_BMI2 | AV_CPU_FLAG_BMI1) |
| #define CPUFLAG_AESNI (AV_CPU_FLAG_AESNI | CPUFLAG_SSE42) |
| 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" }, |
| { "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVXSLOW }, .unit = "flags" }, |
| { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" }, |
| { "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA3 }, .unit = "flags" }, |
| { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" }, |
| { "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX2 }, .unit = "flags" }, |
| { "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1 }, .unit = "flags" }, |
| { "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_BMI2 }, .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" }, |
| { "aesni" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AESNI }, .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" }, |
| { "vfp_vm", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP_VM }, .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" }, |
| #elif ARCH_AARCH64 |
| { "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" }, |
| { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" }, |
| { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .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_parse_cpu_caps(unsigned *flags, const char *s) |
| { |
| 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" }, |
| { "mmx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" }, |
| { "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" }, |
| { "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE }, .unit = "flags" }, |
| { "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2 }, .unit = "flags" }, |
| { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2SLOW }, .unit = "flags" }, |
| { "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3 }, .unit = "flags" }, |
| { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3SLOW }, .unit = "flags" }, |
| { "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_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 = AV_CPU_FLAG_SSE4 }, .unit = "flags" }, |
| { "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE42 }, .unit = "flags" }, |
| { "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX }, .unit = "flags" }, |
| { "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVXSLOW }, .unit = "flags" }, |
| { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_XOP }, .unit = "flags" }, |
| { "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA3 }, .unit = "flags" }, |
| { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA4 }, .unit = "flags" }, |
| { "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX2 }, .unit = "flags" }, |
| { "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1 }, .unit = "flags" }, |
| { "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI2 }, .unit = "flags" }, |
| { "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOW }, .unit = "flags" }, |
| { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOWEXT }, .unit = "flags" }, |
| { "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" }, |
| { "aesni", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AESNI }, .unit = "flags" }, |
| |
| #define CPU_FLAG_P2 AV_CPU_FLAG_CMOV | AV_CPU_FLAG_MMX |
| #define CPU_FLAG_P3 CPU_FLAG_P2 | AV_CPU_FLAG_MMX2 | AV_CPU_FLAG_SSE |
| #define CPU_FLAG_P4 CPU_FLAG_P3| AV_CPU_FLAG_SSE2 |
| { "pentium2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P2 }, .unit = "flags" }, |
| { "pentium3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P3 }, .unit = "flags" }, |
| { "pentium4", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P4 }, .unit = "flags" }, |
| |
| #define CPU_FLAG_K62 AV_CPU_FLAG_MMX | AV_CPU_FLAG_3DNOW |
| #define CPU_FLAG_ATHLON CPU_FLAG_K62 | AV_CPU_FLAG_CMOV | AV_CPU_FLAG_3DNOWEXT | AV_CPU_FLAG_MMX2 |
| #define CPU_FLAG_ATHLONXP CPU_FLAG_ATHLON | AV_CPU_FLAG_SSE |
| #define CPU_FLAG_K8 CPU_FLAG_ATHLONXP | AV_CPU_FLAG_SSE2 |
| { "k6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" }, |
| { "k62", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K62 }, .unit = "flags" }, |
| { "athlon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLON }, .unit = "flags" }, |
| { "athlonxp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLONXP }, .unit = "flags" }, |
| { "k8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K8 }, .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" }, |
| { "vfp_vm", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP_VM }, .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" }, |
| { "setend", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SETEND }, .unit = "flags" }, |
| #elif ARCH_AARCH64 |
| { "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" }, |
| { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" }, |
| { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" }, |
| #endif |
| { NULL }, |
| }; |
| static const AVClass class = { |
| .class_name = "cpuflags", |
| .item_name = av_default_item_name, |
| .option = cpuflags_opts, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| const AVClass *pclass = &class; |
| |
| return av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, flags); |
| } |
| |
| int av_cpu_count(void) |
| { |
| static volatile int printed; |
| |
| int nb_cpus = 1; |
| #if HAVE_WINRT |
| SYSTEM_INFO sysinfo; |
| #endif |
| #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); |
| #elif HAVE_WINRT |
| GetNativeSystemInfo(&sysinfo); |
| nb_cpus = sysinfo.dwNumberOfProcessors; |
| #endif |
| |
| if (!printed) { |
| av_log(NULL, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus); |
| printed = 1; |
| } |
| |
| return nb_cpus; |
| } |
| |
| size_t av_cpu_max_align(void) |
| { |
| if (ARCH_AARCH64) |
| return ff_get_cpu_max_align_aarch64(); |
| if (ARCH_ARM) |
| return ff_get_cpu_max_align_arm(); |
| if (ARCH_PPC) |
| return ff_get_cpu_max_align_ppc(); |
| if (ARCH_X86) |
| return ff_get_cpu_max_align_x86(); |
| |
| return 8; |
| } |
