mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
2658e66cd1
We have AV_CPU_FLAG_ARMV8 == AV_CPU_FLAG_SSE3 which causes a trigger of this MMX warning on AArch64.
302 lines
15 KiB
C
302 lines
15 KiB
C
/*
|
|
* 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 <stdint.h>
|
|
#include <stdatomic.h>
|
|
|
|
#include "cpu.h"
|
|
#include "cpu_internal.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 || 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 int get_cpu_flags(void)
|
|
{
|
|
if (ARCH_AARCH64)
|
|
return ff_get_cpu_flags_aarch64();
|
|
if (ARCH_ARM)
|
|
return ff_get_cpu_flags_arm();
|
|
if (ARCH_PPC)
|
|
return ff_get_cpu_flags_ppc();
|
|
if (ARCH_X86)
|
|
return ff_get_cpu_flags_x86();
|
|
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 ))
|
|
&& !(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;
|
|
}
|
|
|
|
void av_set_cpu_flags_mask(int mask)
|
|
{
|
|
atomic_store_explicit(&cpu_flags, get_cpu_flags() & mask,
|
|
memory_order_relaxed);
|
|
}
|
|
|
|
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_AVXSLOW (AV_CPU_FLAG_AVXSLOW | CPUFLAG_AVX)
|
|
#define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX)
|
|
#define CPUFLAG_FMA3 (AV_CPU_FLAG_FMA3 | CPUFLAG_AVX)
|
|
#define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX)
|
|
#define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX)
|
|
#define CPUFLAG_BMI2 (AV_CPU_FLAG_BMI2 | AV_CPU_FLAG_BMI1)
|
|
#define CPUFLAG_AESNI (AV_CPU_FLAG_AESNI | CPUFLAG_SSE42)
|
|
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" },
|
|
{ "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVXSLOW }, .unit = "flags" },
|
|
{ "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" },
|
|
{ "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA3 }, .unit = "flags" },
|
|
{ "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" },
|
|
{ "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_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 = CPUFLAG_BMI2 }, .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" },
|
|
{ "aesni" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AESNI }, .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" },
|
|
#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" },
|
|
#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" },
|
|
{ "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" },
|
|
|
|
#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" },
|
|
#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_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_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 (!printed) {
|
|
av_log(NULL, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
|
|
printed = 1;
|
|
}
|
|
|
|
return nb_cpus;
|
|
}
|