| /* |
| * 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 "cpu.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 |
| #include <windows.h> |
| #endif |
| #if HAVE_SYSCTL |
| #if HAVE_SYS_PARAM_H |
| #include <sys/param.h> |
| #endif |
| #include <sys/types.h> |
| #include <sys/param.h> |
| #include <sys/sysctl.h> |
| #endif |
| #if HAVE_SYSCONF |
| #include <unistd.h> |
| #endif |
| |
| static int flags, checked; |
| |
| void av_force_cpu_flags(int arg){ |
| flags = arg; |
| checked = arg != -1; |
| } |
| |
| int av_get_cpu_flags(void) |
| { |
| if (checked) |
| return flags; |
| |
| if (ARCH_ARM) flags = ff_get_cpu_flags_arm(); |
| if (ARCH_PPC) flags = ff_get_cpu_flags_ppc(); |
| if (ARCH_X86) flags = ff_get_cpu_flags_x86(); |
| |
| checked = 1; |
| return flags; |
| } |
| |
| void av_set_cpu_flags_mask(int mask) |
| { |
| checked = 0; |
| flags = av_get_cpu_flags() & mask; |
| checked = 1; |
| } |
| |
| 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_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX) |
| #define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX) |
| 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" }, |
| { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" }, |
| { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .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" }, |
| #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" }, |
| { "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" }, |
| #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" }, |
| { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_XOP }, .unit = "flags" }, |
| { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA4 }, .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" }, |
| |
| #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" }, |
| { "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" }, |
| #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_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); |
| #endif |
| |
| if (!printed) { |
| av_log(NULL, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus); |
| printed = 1; |
| } |
| |
| return nb_cpus; |
| } |
| |
| #ifdef TEST |
| |
| #include <stdio.h> |
| |
| static const struct { |
| int flag; |
| const char *name; |
| } cpu_flag_tab[] = { |
| #if ARCH_ARM |
| { AV_CPU_FLAG_ARMV5TE, "armv5te" }, |
| { AV_CPU_FLAG_ARMV6, "armv6" }, |
| { AV_CPU_FLAG_ARMV6T2, "armv6t2" }, |
| { AV_CPU_FLAG_VFP, "vfp" }, |
| { AV_CPU_FLAG_VFPV3, "vfpv3" }, |
| { AV_CPU_FLAG_NEON, "neon" }, |
| #elif ARCH_PPC |
| { AV_CPU_FLAG_ALTIVEC, "altivec" }, |
| #elif ARCH_X86 |
| { AV_CPU_FLAG_MMX, "mmx" }, |
| { AV_CPU_FLAG_MMXEXT, "mmxext" }, |
| { AV_CPU_FLAG_SSE, "sse" }, |
| { AV_CPU_FLAG_SSE2, "sse2" }, |
| { AV_CPU_FLAG_SSE2SLOW, "sse2(slow)" }, |
| { AV_CPU_FLAG_SSE3, "sse3" }, |
| { AV_CPU_FLAG_SSE3SLOW, "sse3(slow)" }, |
| { AV_CPU_FLAG_SSSE3, "ssse3" }, |
| { AV_CPU_FLAG_ATOM, "atom" }, |
| { AV_CPU_FLAG_SSE4, "sse4.1" }, |
| { AV_CPU_FLAG_SSE42, "sse4.2" }, |
| { AV_CPU_FLAG_AVX, "avx" }, |
| { AV_CPU_FLAG_XOP, "xop" }, |
| { AV_CPU_FLAG_FMA4, "fma4" }, |
| { AV_CPU_FLAG_3DNOW, "3dnow" }, |
| { AV_CPU_FLAG_3DNOWEXT, "3dnowext" }, |
| { AV_CPU_FLAG_CMOV, "cmov" }, |
| #endif |
| { 0 } |
| }; |
| |
| int main(void) |
| { |
| int cpu_flags = av_get_cpu_flags(); |
| int i; |
| |
| printf("cpu_flags = 0x%08X\n", cpu_flags); |
| printf("cpu_flags ="); |
| for (i = 0; cpu_flag_tab[i].flag; i++) |
| if (cpu_flags & cpu_flag_tab[i].flag) |
| printf(" %s", cpu_flag_tab[i].name); |
| printf("\n"); |
| |
| return 0; |
| } |
| |
| #endif |
