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196 lines
8.2 KiB
196 lines
8.2 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <stddef.h> |
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#include <stdint.h> |
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#include <stdatomic.h> |
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#include "cpu.h" |
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#include "cpu_internal.h" |
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#include "config.h" |
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#include "opt.h" |
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#include "common.h" |
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#if HAVE_SCHED_GETAFFINITY |
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#define _GNU_SOURCE |
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#include <sched.h> |
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#endif |
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#if HAVE_GETPROCESSAFFINITYMASK |
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#include <windows.h> |
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#endif |
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#if HAVE_SYSCTL |
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#if HAVE_SYS_PARAM_H |
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#include <sys/param.h> |
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#endif |
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#include <sys/types.h> |
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#include <sys/sysctl.h> |
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#endif |
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#if HAVE_SYSCONF |
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#include <unistd.h> |
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#endif |
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static atomic_int cpu_flags = ATOMIC_VAR_INIT(-1); |
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static int get_cpu_flags(void) |
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{ |
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if (ARCH_AARCH64) |
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return ff_get_cpu_flags_aarch64(); |
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if (ARCH_ARM) |
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return ff_get_cpu_flags_arm(); |
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if (ARCH_PPC) |
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return ff_get_cpu_flags_ppc(); |
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if (ARCH_X86) |
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return ff_get_cpu_flags_x86(); |
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return 0; |
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} |
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int av_get_cpu_flags(void) |
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{ |
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int flags = atomic_load_explicit(&cpu_flags, memory_order_relaxed); |
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if (flags == -1) { |
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flags = get_cpu_flags(); |
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atomic_store_explicit(&cpu_flags, flags, memory_order_relaxed); |
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} |
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return flags; |
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} |
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void av_set_cpu_flags_mask(int mask) |
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{ |
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atomic_store_explicit(&cpu_flags, get_cpu_flags() & mask, |
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memory_order_relaxed); |
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} |
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int av_parse_cpu_flags(const char *s) |
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{ |
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#define CPUFLAG_MMXEXT (AV_CPU_FLAG_MMX | AV_CPU_FLAG_MMXEXT | AV_CPU_FLAG_CMOV) |
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#define CPUFLAG_3DNOW (AV_CPU_FLAG_3DNOW | AV_CPU_FLAG_MMX) |
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#define CPUFLAG_3DNOWEXT (AV_CPU_FLAG_3DNOWEXT | CPUFLAG_3DNOW) |
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#define CPUFLAG_SSE (AV_CPU_FLAG_SSE | CPUFLAG_MMXEXT) |
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#define CPUFLAG_SSE2 (AV_CPU_FLAG_SSE2 | CPUFLAG_SSE) |
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#define CPUFLAG_SSE2SLOW (AV_CPU_FLAG_SSE2SLOW | CPUFLAG_SSE2) |
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#define CPUFLAG_SSE3 (AV_CPU_FLAG_SSE3 | CPUFLAG_SSE2) |
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#define CPUFLAG_SSE3SLOW (AV_CPU_FLAG_SSE3SLOW | CPUFLAG_SSE3) |
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#define CPUFLAG_SSSE3 (AV_CPU_FLAG_SSSE3 | CPUFLAG_SSE3) |
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#define CPUFLAG_SSE4 (AV_CPU_FLAG_SSE4 | CPUFLAG_SSSE3) |
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#define CPUFLAG_SSE42 (AV_CPU_FLAG_SSE42 | CPUFLAG_SSE4) |
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#define CPUFLAG_AVX (AV_CPU_FLAG_AVX | CPUFLAG_SSE42) |
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#define CPUFLAG_AVXSLOW (AV_CPU_FLAG_AVXSLOW | CPUFLAG_AVX) |
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#define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX) |
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#define CPUFLAG_FMA3 (AV_CPU_FLAG_FMA3 | CPUFLAG_AVX) |
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#define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX) |
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#define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX) |
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#define CPUFLAG_BMI2 (AV_CPU_FLAG_BMI2 | AV_CPU_FLAG_BMI1) |
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static const AVOption cpuflags_opts[] = { |
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{ "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" }, |
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#if ARCH_PPC |
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{ "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC }, .unit = "flags" }, |
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#elif ARCH_X86 |
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{ "mmx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" }, |
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{ "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_MMXEXT }, .unit = "flags" }, |
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{ "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE }, .unit = "flags" }, |
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{ "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2 }, .unit = "flags" }, |
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{ "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2SLOW }, .unit = "flags" }, |
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{ "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3 }, .unit = "flags" }, |
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{ "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3SLOW }, .unit = "flags" }, |
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{ "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSSE3 }, .unit = "flags" }, |
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{ "atom" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM }, .unit = "flags" }, |
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{ "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE4 }, .unit = "flags" }, |
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{ "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE42 }, .unit = "flags" }, |
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{ "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX }, .unit = "flags" }, |
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{ "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVXSLOW }, .unit = "flags" }, |
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{ "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" }, |
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{ "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA3 }, .unit = "flags" }, |
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{ "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" }, |
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{ "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX2 }, .unit = "flags" }, |
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{ "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1 }, .unit = "flags" }, |
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{ "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_BMI2 }, .unit = "flags" }, |
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{ "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOW }, .unit = "flags" }, |
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{ "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOWEXT }, .unit = "flags" }, |
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{ "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" }, |
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#elif ARCH_ARM |
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{ "armv5te", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE }, .unit = "flags" }, |
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{ "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" }, |
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{ "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" }, |
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{ "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" }, |
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{ "vfp_vm", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP_VM }, .unit = "flags" }, |
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{ "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" }, |
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{ "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" }, |
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#elif ARCH_AARCH64 |
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{ "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" }, |
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{ "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" }, |
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{ "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" }, |
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#endif |
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{ NULL }, |
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}; |
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static const AVClass class = { |
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.class_name = "cpuflags", |
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.item_name = av_default_item_name, |
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.option = cpuflags_opts, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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int flags = 0, ret; |
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const AVClass *pclass = &class; |
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if ((ret = av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, &flags)) < 0) |
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return ret; |
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return flags & INT_MAX; |
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} |
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int av_cpu_count(void) |
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{ |
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int nb_cpus = 1; |
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#if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT) |
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cpu_set_t cpuset; |
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CPU_ZERO(&cpuset); |
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if (!sched_getaffinity(0, sizeof(cpuset), &cpuset)) |
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nb_cpus = CPU_COUNT(&cpuset); |
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#elif HAVE_GETPROCESSAFFINITYMASK |
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DWORD_PTR proc_aff, sys_aff; |
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if (GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff)) |
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nb_cpus = av_popcount64(proc_aff); |
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#elif HAVE_SYSCTL && defined(HW_NCPU) |
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int mib[2] = { CTL_HW, HW_NCPU }; |
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size_t len = sizeof(nb_cpus); |
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if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1) |
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nb_cpus = 0; |
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#elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN) |
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nb_cpus = sysconf(_SC_NPROC_ONLN); |
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#elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN) |
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nb_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
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#endif |
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return nb_cpus; |
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} |
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size_t av_cpu_max_align(void) |
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{ |
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if (ARCH_AARCH64) |
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return ff_get_cpu_max_align_aarch64(); |
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if (ARCH_ARM) |
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return ff_get_cpu_max_align_arm(); |
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if (ARCH_PPC) |
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return ff_get_cpu_max_align_ppc(); |
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if (ARCH_X86) |
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return ff_get_cpu_max_align_x86(); |
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return 8; |
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}
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