27 #if HAVE_SCHED_GETAFFINITY
33 #if HAVE_GETPROCESSAFFINITYMASK
38 #include <sys/param.h>
40 #include <sys/types.h>
41 #include <sys/sysctl.h>
102 #define CPUFLAG_MMXEXT (AV_CPU_FLAG_MMX | AV_CPU_FLAG_MMXEXT | AV_CPU_FLAG_CMOV)
103 #define CPUFLAG_3DNOW (AV_CPU_FLAG_3DNOW | AV_CPU_FLAG_MMX)
104 #define CPUFLAG_3DNOWEXT (AV_CPU_FLAG_3DNOWEXT | CPUFLAG_3DNOW)
105 #define CPUFLAG_SSE (AV_CPU_FLAG_SSE | CPUFLAG_MMXEXT)
106 #define CPUFLAG_SSE2 (AV_CPU_FLAG_SSE2 | CPUFLAG_SSE)
107 #define CPUFLAG_SSE2SLOW (AV_CPU_FLAG_SSE2SLOW | CPUFLAG_SSE2)
108 #define CPUFLAG_SSE3 (AV_CPU_FLAG_SSE3 | CPUFLAG_SSE2)
109 #define CPUFLAG_SSE3SLOW (AV_CPU_FLAG_SSE3SLOW | CPUFLAG_SSE3)
110 #define CPUFLAG_SSSE3 (AV_CPU_FLAG_SSSE3 | CPUFLAG_SSE3)
111 #define CPUFLAG_SSE4 (AV_CPU_FLAG_SSE4 | CPUFLAG_SSSE3)
112 #define CPUFLAG_SSE42 (AV_CPU_FLAG_SSE42 | CPUFLAG_SSE4)
113 #define CPUFLAG_AVX (AV_CPU_FLAG_AVX | CPUFLAG_SSE42)
114 #define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX)
115 #define CPUFLAG_FMA3 (AV_CPU_FLAG_FMA3 | CPUFLAG_AVX)
116 #define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX)
117 #define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX)
118 #define CPUFLAG_BMI1 (AV_CPU_FLAG_BMI1)
119 #define CPUFLAG_BMI2 (AV_CPU_FLAG_BMI2 | CPUFLAG_BMI1)
120 static const AVOption cpuflags_opts[] = {
163 .option = cpuflags_opts,
168 const AVClass *pclass = &
class;
173 return flags & INT_MAX;
178 static const AVOption cpuflags_opts[] = {
206 #define CPU_FLAG_P2 AV_CPU_FLAG_CMOV | AV_CPU_FLAG_MMX
207 #define CPU_FLAG_P3 CPU_FLAG_P2 | AV_CPU_FLAG_MMX2 | AV_CPU_FLAG_SSE
208 #define CPU_FLAG_P4 CPU_FLAG_P3| AV_CPU_FLAG_SSE2
213 #define CPU_FLAG_K62 AV_CPU_FLAG_MMX | AV_CPU_FLAG_3DNOW
214 #define CPU_FLAG_ATHLON CPU_FLAG_K62 | AV_CPU_FLAG_CMOV | AV_CPU_FLAG_3DNOWEXT | AV_CPU_FLAG_MMX2
215 #define CPU_FLAG_ATHLONXP CPU_FLAG_ATHLON | AV_CPU_FLAG_SSE
216 #define CPU_FLAG_K8 CPU_FLAG_ATHLONXP | AV_CPU_FLAG_SSE2
240 .option = cpuflags_opts,
243 const AVClass *pclass = &
class;
250 static volatile int printed;
253 #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
258 if (!sched_getaffinity(0,
sizeof(cpuset), &cpuset))
259 nb_cpus = CPU_COUNT(&cpuset);
260 #elif HAVE_GETPROCESSAFFINITYMASK
262 if (GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff))
263 nb_cpus = av_popcount64(proc_aff);
264 #elif HAVE_SYSCTL && defined(HW_NCPU)
265 int mib[2] = { CTL_HW, HW_NCPU };
266 size_t len =
sizeof(nb_cpus);
268 if (sysctl(mib, 2, &nb_cpus, &len,
NULL, 0) == -1)
270 #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
271 nb_cpus = sysconf(_SC_NPROC_ONLN);
272 #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
273 nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
293 static const struct {
337 static void print_cpu_flags(
int cpu_flags,
const char *
type)
341 printf(
"cpu_flags(%s) = 0x%08X\n", type, cpu_flags);
342 printf(
"cpu_flags_str(%s) =", type);
343 for (i = 0; cpu_flag_tab[i].flag; i++)
344 if (cpu_flags & cpu_flag_tab[i].flag)
345 printf(
" %s", cpu_flag_tab[i].
name);
350 int main(
int argc,
char **argv)
355 char threads[5] =
"auto";
358 for(i = 0; cpu_flag_tab[i].flag; i++) {
361 fprintf(stderr,
"Table missing %s\n", cpu_flag_tab[i].name);
366 if (cpu_flags_raw < 0)
370 int c =
getopt(argc, argv,
"c:t:");
386 if (len >=
sizeof(threads)) {
387 fprintf(stderr,
"Invalid thread count '%s'\n",
optarg);
396 if (cpu_flags_eff < 0)
399 print_cpu_flags(cpu_flags_raw,
"raw");
400 print_cpu_flags(cpu_flags_eff,
"effective");
401 printf(
"threads = %s (cpu_count = %d)\n", threads, cpu_count);
#define AV_CPU_FLAG_AVX
AVX functions: requires OS support even if YMM registers aren't used.
#define AV_CPU_FLAG_ALTIVEC
standard
#define AV_LOG_WARNING
Something somehow does not look correct.
#define LIBAVUTIL_VERSION_INT
#define AV_CPU_FLAG_SSE
SSE functions.
void av_set_cpu_flags_mask(int mask)
Set a mask on flags returned by av_get_cpu_flags().
#define AV_CPU_FLAG_MMX2
SSE integer functions or AMD MMX ext.
#define AV_CPU_FLAG_CMOV
supports cmov instruction
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_FMA3
Haswell FMA3 functions.
#define AV_CPU_FLAG_MMXEXT
SSE integer functions or AMD MMX ext.
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_ATOM
Atom processor, some SSSE3 instructions are slower.
#define AV_CPU_FLAG_AVX2
AVX2 functions: requires OS support even if YMM registers aren't used.
#define AV_CPU_FLAG_SSE2SLOW
SSE2 supported, but usually not faster.
#define AV_CPU_FLAG_XOP
Bulldozer XOP functions.
#define AV_CPU_FLAG_SSE42
Nehalem SSE4.2 functions.
#define AV_CPU_FLAG_SSSE3
Conroe SSSE3 functions.
static const uint16_t mask[17]
int av_opt_eval_flags(void *obj, const AVOption *o, const char *val, int *flags_out)
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
#define AV_CPU_FLAG_ARMV6T2
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.
int av_parse_cpu_caps(unsigned *flags, const char *s)
Parse CPU caps from a string and update the given AV_CPU_* flags based on that.
#define AV_CPU_FLAG_ARMV5TE
#define AV_CPU_FLAG_SSE3
Prescott SSE3 functions.
int ff_get_cpu_flags_x86(void)
#define AV_CPU_FLAG_BMI2
Bit Manipulation Instruction Set 2.
#define AV_CPU_FLAG_VFPV3
#define AV_CPU_FLAG_3DNOW
AMD 3DNOW.
#define AV_CPU_FLAG_ARMV6
int ff_get_cpu_flags_aarch64(void)
#define AV_CPU_FLAG_SSE3SLOW
SSE3 supported, but usually not faster.
#define AV_CPU_FLAG_BMI1
Bit Manipulation Instruction Set 1.
#define AV_CPU_FLAG_MMX
standard MMX
static int getopt(int argc, char *argv[], char *opts)
Describe the class of an AVClass context structure.
#define AV_CPU_FLAG_FMA4
Bulldozer FMA4 functions.
#define AV_CPU_FLAG_SSE4
Penryn SSE4.1 functions.
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
#define AV_CPU_FLAG_3DNOWEXT
AMD 3DNowExt.
common internal and external API header
#define AV_CPU_FLAG_ARMV8
int ff_get_cpu_flags_arm(void)
#define AV_CPU_FLAG_SETEND
#define AV_CPU_FLAG_SSE2
PIV SSE2 functions.
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
int main(int argc, char **argv)