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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "cpu.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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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE
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#endif
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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/param.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 int flags, checked;
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void av_force_cpu_flags(int arg){
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flags = arg;
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checked = arg != -1;
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}
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int av_get_cpu_flags(void)
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{
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if (checked)
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return flags;
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if (ARCH_ARM) flags = ff_get_cpu_flags_arm();
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if (ARCH_PPC) flags = ff_get_cpu_flags_ppc();
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if (ARCH_X86) flags = ff_get_cpu_flags_x86();
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checked = 1;
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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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checked = 0;
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flags = av_get_cpu_flags() & mask;
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checked = 1;
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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_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX)
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#define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX)
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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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{ "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" },
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{ "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .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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{ "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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#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_parse_cpu_caps(unsigned *flags, const char *s)
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{
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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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{ "mmx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" },
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{ "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2 }, .unit = "flags" },
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{ "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE }, .unit = "flags" },
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{ "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2 }, .unit = "flags" },
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{ "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2SLOW }, .unit = "flags" },
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{ "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3 }, .unit = "flags" },
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{ "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3SLOW }, .unit = "flags" },
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{ "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_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 = AV_CPU_FLAG_SSE4 }, .unit = "flags" },
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{ "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE42 }, .unit = "flags" },
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{ "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX }, .unit = "flags" },
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{ "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_XOP }, .unit = "flags" },
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{ "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA4 }, .unit = "flags" },
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{ "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOW }, .unit = "flags" },
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{ "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_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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#define CPU_FLAG_P2 AV_CPU_FLAG_CMOV | AV_CPU_FLAG_MMX
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#define CPU_FLAG_P3 CPU_FLAG_P2 | AV_CPU_FLAG_MMX2 | AV_CPU_FLAG_SSE
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#define CPU_FLAG_P4 CPU_FLAG_P3| AV_CPU_FLAG_SSE2
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{ "pentium2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P2 }, .unit = "flags" },
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{ "pentium3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P3 }, .unit = "flags" },
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{ "pentium4", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P4 }, .unit = "flags" },
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#define CPU_FLAG_K62 AV_CPU_FLAG_MMX | AV_CPU_FLAG_3DNOW
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#define CPU_FLAG_ATHLON CPU_FLAG_K62 | AV_CPU_FLAG_CMOV | AV_CPU_FLAG_3DNOWEXT | AV_CPU_FLAG_MMX2
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#define CPU_FLAG_ATHLONXP CPU_FLAG_ATHLON | AV_CPU_FLAG_SSE
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#define CPU_FLAG_K8 CPU_FLAG_ATHLONXP | AV_CPU_FLAG_SSE2
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{ "k6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
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{ "k62", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K62 }, .unit = "flags" },
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{ "athlon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLON }, .unit = "flags" },
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{ "athlonxp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLONXP }, .unit = "flags" },
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{ "k8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K8 }, .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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{ "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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#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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const AVClass *pclass = &class;
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return av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, flags);
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}
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int av_cpu_count(void)
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{
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static volatile int printed;
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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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if (!printed) {
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av_log(NULL, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
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printed = 1;
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}
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return nb_cpus;
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}
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#ifdef TEST
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#include <stdio.h>
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static const struct {
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int flag;
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const char *name;
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} cpu_flag_tab[] = {
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#if ARCH_ARM
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{ AV_CPU_FLAG_ARMV5TE, "armv5te" },
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{ AV_CPU_FLAG_ARMV6, "armv6" },
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{ AV_CPU_FLAG_ARMV6T2, "armv6t2" },
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{ AV_CPU_FLAG_VFP, "vfp" },
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{ AV_CPU_FLAG_VFPV3, "vfpv3" },
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{ AV_CPU_FLAG_NEON, "neon" },
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#elif ARCH_PPC
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{ AV_CPU_FLAG_ALTIVEC, "altivec" },
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#elif ARCH_X86
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{ AV_CPU_FLAG_MMX, "mmx" },
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{ AV_CPU_FLAG_MMXEXT, "mmxext" },
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{ AV_CPU_FLAG_SSE, "sse" },
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{ AV_CPU_FLAG_SSE2, "sse2" },
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{ AV_CPU_FLAG_SSE2SLOW, "sse2(slow)" },
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{ AV_CPU_FLAG_SSE3, "sse3" },
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{ AV_CPU_FLAG_SSE3SLOW, "sse3(slow)" },
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{ AV_CPU_FLAG_SSSE3, "ssse3" },
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{ AV_CPU_FLAG_ATOM, "atom" },
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{ AV_CPU_FLAG_SSE4, "sse4.1" },
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{ AV_CPU_FLAG_SSE42, "sse4.2" },
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{ AV_CPU_FLAG_AVX, "avx" },
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{ AV_CPU_FLAG_XOP, "xop" },
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{ AV_CPU_FLAG_FMA4, "fma4" },
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{ AV_CPU_FLAG_3DNOW, "3dnow" },
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{ AV_CPU_FLAG_3DNOWEXT, "3dnowext" },
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{ AV_CPU_FLAG_CMOV, "cmov" },
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#endif
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{ 0 }
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};
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int main(void)
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{
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int cpu_flags = av_get_cpu_flags();
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int i;
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printf("cpu_flags = 0x%08X\n", cpu_flags);
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printf("cpu_flags =");
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for (i = 0; cpu_flag_tab[i].flag; i++)
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if (cpu_flags & cpu_flag_tab[i].flag)
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printf(" %s", cpu_flag_tab[i].name);
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printf("\n");
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return 0;
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}
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#endif
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