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Diffstat (limited to 'media/libav/libavutil/cpu.c')
| -rw-r--r-- | media/libav/libavutil/cpu.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/media/libav/libavutil/cpu.c b/media/libav/libavutil/cpu.c new file mode 100644 index 000000000..354d21e76 --- /dev/null +++ b/media/libav/libavutil/cpu.c @@ -0,0 +1,295 @@ +/* + * 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 <stdint.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 int cpuflags_mask = -1, checked; + +int av_get_cpu_flags(void) +{ + static int flags; + + if (checked) + return flags; + + if (ARCH_AARCH64) + flags = ff_get_cpu_flags_aarch64(); + 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(); + + flags &= cpuflags_mask; + checked = 1; + + return flags; +} + +void av_set_cpu_flags_mask(int mask) +{ + cpuflags_mask = mask; + checked = 0; +} + +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_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_BMI1 (AV_CPU_FLAG_BMI1) +#define CPUFLAG_BMI2 (AV_CPU_FLAG_BMI2 | CPUFLAG_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" }, + { "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 = CPUFLAG_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" }, + { "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; +} + +#ifdef TEST + +#include <stdio.h> +#if HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include "avstring.h" + +#if !HAVE_GETOPT +#include "compat/getopt.c" +#endif + +static const struct { + int flag; + const char *name; +} cpu_flag_tab[] = { +#if ARCH_AARCH64 + { AV_CPU_FLAG_ARMV8, "armv8" }, + { AV_CPU_FLAG_NEON, "neon" }, + { AV_CPU_FLAG_VFP, "vfp" }, +#elif 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_FMA3, "fma3" }, + { AV_CPU_FLAG_FMA4, "fma4" }, + { AV_CPU_FLAG_3DNOW, "3dnow" }, + { AV_CPU_FLAG_3DNOWEXT, "3dnowext" }, + { AV_CPU_FLAG_CMOV, "cmov" }, + { AV_CPU_FLAG_AVX2, "avx2" }, + { AV_CPU_FLAG_BMI1, "bmi1" }, + { AV_CPU_FLAG_BMI2, "bmi2" }, +#endif + { 0 } +}; + +static void print_cpu_flags(int cpu_flags, const char *type) +{ + int i; + + fprintf(stderr, "cpu_flags(%s) = 0x%08X\n", type, cpu_flags); + fprintf(stderr, "cpu_flags_str(%s) =", type); + for (i = 0; cpu_flag_tab[i].flag; i++) + if (cpu_flags & cpu_flag_tab[i].flag) + fprintf(stderr, " %s", cpu_flag_tab[i].name); + fprintf(stderr, "\n"); +} + + +int main(int argc, char **argv) +{ + int cpu_flags_raw = av_get_cpu_flags(); + int cpu_flags_eff; + int cpu_count = av_cpu_count(); + char threads[5] = "auto"; + + if (cpu_flags_raw < 0) + return 1; + + for (;;) { + int c = getopt(argc, argv, "c:t:"); + if (c == -1) + break; + switch (c) { + case 'c': + { + int cpuflags = av_parse_cpu_flags(optarg); + if (cpuflags < 0) + return 2; + av_set_cpu_flags_mask(cpuflags); + break; + } + case 't': + { + int len = av_strlcpy(threads, optarg, sizeof(threads)); + if (len >= sizeof(threads)) { + fprintf(stderr, "Invalid thread count '%s'\n", optarg); + return 2; + } + } + } + } + + cpu_flags_eff = av_get_cpu_flags(); + + if (cpu_flags_eff < 0) + return 3; + + print_cpu_flags(cpu_flags_raw, "raw"); + print_cpu_flags(cpu_flags_eff, "effective"); + fprintf(stderr, "threads = %s (cpu_count = %d)\n", threads, cpu_count); + + return 0; +} + +#endif |