27 #if HAVE_SCHED_GETAFFINITY
31 #if HAVE_GETPROCESSAFFINITYMASK
36 #include <sys/param.h>
38 #include <sys/types.h>
39 #include <sys/sysctl.h>
77 #define CPUFLAG_MMXEXT (AV_CPU_FLAG_MMX | AV_CPU_FLAG_MMXEXT | AV_CPU_FLAG_CMOV)
78 #define CPUFLAG_3DNOW (AV_CPU_FLAG_3DNOW | AV_CPU_FLAG_MMX)
79 #define CPUFLAG_3DNOWEXT (AV_CPU_FLAG_3DNOWEXT | CPUFLAG_3DNOW)
80 #define CPUFLAG_SSE (AV_CPU_FLAG_SSE | CPUFLAG_MMXEXT)
81 #define CPUFLAG_SSE2 (AV_CPU_FLAG_SSE2 | CPUFLAG_SSE)
82 #define CPUFLAG_SSE2SLOW (AV_CPU_FLAG_SSE2SLOW | CPUFLAG_SSE2)
83 #define CPUFLAG_SSE3 (AV_CPU_FLAG_SSE3 | CPUFLAG_SSE2)
84 #define CPUFLAG_SSE3SLOW (AV_CPU_FLAG_SSE3SLOW | CPUFLAG_SSE3)
85 #define CPUFLAG_SSSE3 (AV_CPU_FLAG_SSSE3 | CPUFLAG_SSE3)
86 #define CPUFLAG_SSE4 (AV_CPU_FLAG_SSE4 | CPUFLAG_SSSE3)
87 #define CPUFLAG_SSE42 (AV_CPU_FLAG_SSE42 | CPUFLAG_SSE4)
88 #define CPUFLAG_AVX (AV_CPU_FLAG_AVX | CPUFLAG_SSE42)
89 #define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX)
90 #define CPUFLAG_FMA3 (AV_CPU_FLAG_FMA3 | CPUFLAG_AVX)
91 #define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX)
92 #define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX)
93 #define CPUFLAG_BMI1 (AV_CPU_FLAG_BMI1)
94 #define CPUFLAG_BMI2 (AV_CPU_FLAG_BMI2 | CPUFLAG_BMI1)
95 static const AVOption cpuflags_opts[] = {
138 .option = cpuflags_opts,
143 const AVClass *pclass = &
class;
148 return flags & INT_MAX;
154 #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
159 if (!sched_getaffinity(0,
sizeof(cpuset), &cpuset))
160 nb_cpus = CPU_COUNT(&cpuset);
161 #elif HAVE_GETPROCESSAFFINITYMASK
162 DWORD_PTR proc_aff, sys_aff;
163 if (GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff))
164 nb_cpus = av_popcount64(proc_aff);
165 #elif HAVE_SYSCTL && defined(HW_NCPU)
166 int mib[2] = { CTL_HW, HW_NCPU };
167 size_t len =
sizeof(nb_cpus);
169 if (sysctl(mib, 2, &nb_cpus, &len,
NULL, 0) == -1)
171 #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
172 nb_cpus = sysconf(_SC_NPROC_ONLN);
173 #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
174 nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
187 #include "avstring.h"
193 static const struct {
236 static void print_cpu_flags(
int cpu_flags,
const char *type)
240 fprintf(stderr,
"cpu_flags(%s) = 0x%08X\n", type, cpu_flags);
241 fprintf(stderr,
"cpu_flags_str(%s) =", type);
242 for (i = 0; cpu_flag_tab[i].flag; i++)
243 if (cpu_flags & cpu_flag_tab[i].flag)
244 fprintf(stderr,
" %s", cpu_flag_tab[i].
name);
245 fprintf(stderr,
"\n");
249 int main(
int argc,
char **argv)
254 char threads[5] =
"auto";
256 if (cpu_flags_raw < 0)
260 int c =
getopt(argc, argv,
"c:t:");
275 if (len >=
sizeof(threads)) {
276 fprintf(stderr,
"Invalid thread count '%s'\n",
optarg);
285 if (cpu_flags_eff < 0)
288 print_cpu_flags(cpu_flags_raw,
"raw");
289 print_cpu_flags(cpu_flags_eff,
"effective");
290 fprintf(stderr,
"threads = %s (cpu_count = %d)\n", threads, cpu_count);
#define AV_CPU_FLAG_MMXEXT
SSE integer functions or AMD MMX ext.
#define AV_CPU_FLAG_SSE3
Prescott SSE3 functions.
#define AV_CPU_FLAG_BMI1
Bit Manipulation Instruction Set 1.
#define AV_CPU_FLAG_CMOV
i686 cmov
#define AV_CPU_FLAG_SSE2
PIV SSE2 functions.
void av_set_cpu_flags_mask(int mask)
Set a mask on flags returned by av_get_cpu_flags().
#define AV_CPU_FLAG_3DNOW
AMD 3DNOW.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
#define AV_CPU_FLAG_ARMV8
#define AV_CPU_FLAG_BMI2
Bit Manipulation Instruction Set 2.
int ff_get_cpu_flags_ppc(void)
This function MAY rely on signal() or fork() in order to make sure AltiVec is present.
int av_parse_cpu_flags(const char *s)
Parse CPU flags from a string.
#define AV_CPU_FLAG_SSE
SSE functions.
#define AV_CPU_FLAG_FMA4
Bulldozer FMA4 functions.
#define AV_CPU_FLAG_ARMV6
#define AV_CPU_FLAG_SSE4
Penryn SSE4.1 functions.
static const uint16_t mask[17]
int av_opt_eval_flags(void *obj, const AVOption *o, const char *val, int *flags_out)
int main(int argc, char **argv)
#define AV_CPU_FLAG_ALTIVEC
standard
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
#define AV_CPU_FLAG_ARMV6T2
int ff_get_cpu_flags_x86(void)
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
#define AV_CPU_FLAG_SSE42
Nehalem SSE4.2 functions.
int ff_get_cpu_flags_aarch64(void)
#define AV_CPU_FLAG_MMX
standard MMX
static int getopt(int argc, char *argv[], char *opts)
#define AV_CPU_FLAG_FMA3
Haswell FMA3 functions.
Describe the class of an AVClass context structure.
#define AV_CPU_FLAG_VFPV3
#define AV_CPU_FLAG_3DNOWEXT
AMD 3DNowExt.
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
#define AV_CPU_FLAG_XOP
Bulldozer XOP functions.
#define AV_CPU_FLAG_SSE3SLOW
SSE3 supported, but usually not faster.
#define AV_CPU_FLAG_ARMV5TE
int ff_get_cpu_flags_arm(void)
#define AV_CPU_FLAG_AVX
AVX functions: requires OS support even if YMM registers aren't used.
#define AV_CPU_FLAG_SSE2SLOW
SSE2 supported, but usually not faster.
av_default_item_name
Return the context name.
common internal and external API header
#define AV_CPU_FLAG_SSSE3
Conroe SSSE3 functions.
#define AV_CPU_FLAG_AVX2
AVX2 functions: requires OS support even if YMM registers aren't used.