/* * 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 #if HAVE_GETAUXVAL || HAVE_ELF_AUX_INFO#include <sys/auxv.h>#endif static atomic_int cpu_flags = -1;static atomic_int cpu_count = -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_WASM    return ff_get_cpu_flags_wasm();#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" },        { "vsx"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VSX      },    .unit = "flags" },        { "power8"  , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_POWER8   },    .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" },        { "sve",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SVE      },    .unit = "flags" },        { "sve2",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SVE2     },    .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" },        { "rvb",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVB      },    .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" },        { "zbb",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVB_BASIC },   .unit = "flags" },        { "zvbb",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RV_ZVBB },   .unit = "flags" },        { "misaligned", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RV_MISALIGNED },   .unit = "flags" },#elif ARCH_WASM        { "simd128",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SIMD128  },    .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 = 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_WASM    return ff_get_cpu_max_align_wasm();#elif ARCH_X86    return ff_get_cpu_max_align_x86();#elif ARCH_LOONGARCH    return ff_get_cpu_max_align_loongarch();#endif     return 8;} #if !ARCH_X86unsigned long ff_getauxval(unsigned long type){#if HAVE_GETAUXVAL    return getauxval(type);#elif HAVE_ELF_AUX_INFO    unsigned long aux = 0;    int ret = elf_aux_info(type, &aux, sizeof(aux));    if (ret != 0) {        errno = ret;    }    return aux;#else    errno = ENOSYS;    return 0;#endif}#endif