mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
195 lines
8.1 KiB
195 lines
8.1 KiB
/* |
|
* This file is part of Libav. |
|
* |
|
* Libav 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. |
|
* |
|
* Libav 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 Libav; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include <stddef.h> |
|
#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 |
|
#define _GNU_SOURCE |
|
#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/sysctl.h> |
|
#endif |
|
#if HAVE_SYSCONF |
|
#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; |
|
} |
|
|
|
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) |
|
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" }, |
|
#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_cpu_count(void) |
|
{ |
|
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 |
|
|
|
return nb_cpus; |
|
} |
|
|
|
size_t av_cpu_max_align(void) |
|
{ |
|
int flags = av_get_cpu_flags(); |
|
|
|
if (flags & AV_CPU_FLAG_AVX) |
|
return 32; |
|
if (flags & (AV_CPU_FLAG_ALTIVEC | AV_CPU_FLAG_SSE | AV_CPU_FLAG_NEON)) |
|
return 16; |
|
|
|
return 8; |
|
}
|
|
|