| /* | |
| * 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 "config.h" | |
| #if HAVE_SCHED_GETAFFINITY | |
| #ifndef _GNU_SOURCE | |
| # define _GNU_SOURCE | |
| #endif | |
| #include <sched.h> | |
| #endif | |
| #include <stddef.h> | |
| #include <stdint.h> | |
| #include <stdatomic.h> | |
| #include "attributes.h" | |
| #include "cpu.h" | |
| #include "cpu_internal.h" | |
| #include "opt.h" | |
| #include "common.h" | |
| #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 atomic_int cpu_count = ATOMIC_VAR_INIT(-1); | |
| static int get_cpu_flags(void) | |
| { | |
| #if ARCH_MIPS | |
| return ff_get_cpu_flags_mips(); | |
| #elif ARCH_AARCH64 | |
| return ff_get_cpu_flags_aarch64(); | |
| #elif ARCH_ARM | |
| return ff_get_cpu_flags_arm(); | |
| #elif ARCH_PPC | |
| return ff_get_cpu_flags_ppc(); | |
| #elif ARCH_RISCV | |
| return ff_get_cpu_flags_riscv(); | |
| #elif ARCH_X86 | |
| return ff_get_cpu_flags_x86(); | |
| #elif ARCH_LOONGARCH | |
| return ff_get_cpu_flags_loongarch(); | |
| #endif | |
| 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 | | |
| AV_CPU_FLAG_AVX512 )) | |
| && !(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; | |
| } | |
| 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" }, | |
| { "avx512" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX512 }, .unit = "flags" }, | |
| { "avx512icl", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX512ICL }, .unit = "flags" }, | |
| { "slowgather", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SLOW_GATHER }, .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" }, | |
| { "dotprod", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_DOTPROD }, .unit = "flags" }, | |
| { "i8mm", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_I8MM }, .unit = "flags" }, | |
| #elif ARCH_MIPS | |
| { "mmi", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMI }, .unit = "flags" }, | |
| { "msa", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MSA }, .unit = "flags" }, | |
| #elif ARCH_LOONGARCH | |
| { "lsx", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_LSX }, .unit = "flags" }, | |
| { "lasx", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_LASX }, .unit = "flags" }, | |
| #elif ARCH_RISCV | |
| { "rvi", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVI }, .unit = "flags" }, | |
| { "rvf", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVF }, .unit = "flags" }, | |
| { "rvd", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVD }, .unit = "flags" }, | |
| { "zve32x", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_I32 }, .unit = "flags" }, | |
| { "zve32f", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_F32 }, .unit = "flags" }, | |
| { "zve64x", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_I64 }, .unit = "flags" }, | |
| { "zve64d", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_F64 }, .unit = "flags" }, | |
| { "zba", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVB_ADDR }, .unit = "flags" }, | |
| { "zbb", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVB_BASIC }, .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 atomic_int printed = ATOMIC_VAR_INIT(0); | |
| int nb_cpus = 1; | |
| int count = 0; | |
| #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_NCPUONLINE) | |
| int mib[2] = { CTL_HW, HW_NCPUONLINE }; | |
| size_t len = sizeof(nb_cpus); | |
| if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1) | |
| nb_cpus = 0; | |
| #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 (!atomic_exchange_explicit(&printed, 1, memory_order_relaxed)) | |
| av_log(NULL, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus); | |
| count = atomic_load_explicit(&cpu_count, memory_order_relaxed); | |
| if (count > 0) { | |
| nb_cpus = count; | |
| av_log(NULL, AV_LOG_DEBUG, "overriding to %d logical cores\n", nb_cpus); | |
| } | |
| return nb_cpus; | |
| } | |
| void av_cpu_force_count(int count) | |
| { | |
| atomic_store_explicit(&cpu_count, count, memory_order_relaxed); | |
| } | |
| size_t av_cpu_max_align(void) | |
| { | |
| #if ARCH_MIPS | |
| return ff_get_cpu_max_align_mips(); | |
| #elif ARCH_AARCH64 | |
| return ff_get_cpu_max_align_aarch64(); | |
| #elif ARCH_ARM | |
| return ff_get_cpu_max_align_arm(); | |
| #elif ARCH_PPC | |
| return ff_get_cpu_max_align_ppc(); | |
| #elif ARCH_X86 | |
| return ff_get_cpu_max_align_x86(); | |
| #elif ARCH_LOONGARCH | |
| return ff_get_cpu_max_align_loongarch(); | |
| #endif | |
| return 8; | |
| } |