Line data Source code
1 : /*
2 : * This file is part of Libav.
3 : *
4 : * Libav is free software; you can redistribute it and/or
5 : * modify it under the terms of the GNU Lesser General Public
6 : * License as published by the Free Software Foundation; either
7 : * version 2.1 of the License, or (at your option) any later version.
8 : *
9 : * Libav is distributed in the hope that it will be useful,
10 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 : * Lesser General Public License for more details.
13 : *
14 : * You should have received a copy of the GNU Lesser General Public
15 : * License along with Libav; if not, write to the Free Software
16 : * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 : */
18 :
19 : #include <stdint.h>
20 :
21 : #include "cpu.h"
22 : #include "cpu_internal.h"
23 : #include "config.h"
24 : #include "opt.h"
25 : #include "common.h"
26 :
27 : #if HAVE_SCHED_GETAFFINITY
28 : #define _GNU_SOURCE
29 : #include <sched.h>
30 : #endif
31 : #if HAVE_GETPROCESSAFFINITYMASK
32 : #include <windows.h>
33 : #endif
34 : #if HAVE_SYSCTL
35 : #if HAVE_SYS_PARAM_H
36 : #include <sys/param.h>
37 : #endif
38 : #include <sys/types.h>
39 : #include <sys/sysctl.h>
40 : #endif
41 : #if HAVE_SYSCONF
42 : #include <unistd.h>
43 : #endif
44 :
45 : static int cpuflags_mask = -1, checked;
46 :
47 0 : int av_get_cpu_flags(void)
48 : {
49 : static int flags;
50 :
51 0 : if (checked)
52 0 : return flags;
53 :
54 : if (ARCH_AARCH64)
55 : flags = ff_get_cpu_flags_aarch64();
56 : if (ARCH_ARM)
57 : flags = ff_get_cpu_flags_arm();
58 : if (ARCH_PPC)
59 : flags = ff_get_cpu_flags_ppc();
60 : if (ARCH_X86)
61 0 : flags = ff_get_cpu_flags_x86();
62 :
63 0 : flags &= cpuflags_mask;
64 0 : checked = 1;
65 :
66 0 : return flags;
67 : }
68 :
69 0 : void av_set_cpu_flags_mask(int mask)
70 : {
71 0 : cpuflags_mask = mask;
72 0 : checked = 0;
73 0 : }
74 :
75 0 : int av_parse_cpu_flags(const char *s)
76 : {
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[] = {
96 : { "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
97 : #if ARCH_PPC
98 : { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC }, .unit = "flags" },
99 : #elif ARCH_X86
100 : { "mmx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX }, .unit = "flags" },
101 : { "mmxext" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_MMXEXT }, .unit = "flags" },
102 : { "sse" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE }, .unit = "flags" },
103 : { "sse2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2 }, .unit = "flags" },
104 : { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE2SLOW }, .unit = "flags" },
105 : { "sse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3 }, .unit = "flags" },
106 : { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE3SLOW }, .unit = "flags" },
107 : { "ssse3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSSE3 }, .unit = "flags" },
108 : { "atom" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM }, .unit = "flags" },
109 : { "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE4 }, .unit = "flags" },
110 : { "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE42 }, .unit = "flags" },
111 : { "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX }, .unit = "flags" },
112 : { "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" },
113 : { "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA3 }, .unit = "flags" },
114 : { "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" },
115 : { "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX2 }, .unit = "flags" },
116 : { "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_BMI1 }, .unit = "flags" },
117 : { "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_BMI2 }, .unit = "flags" },
118 : { "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOW }, .unit = "flags" },
119 : { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOWEXT }, .unit = "flags" },
120 : { "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" },
121 : #elif ARCH_ARM
122 : { "armv5te", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE }, .unit = "flags" },
123 : { "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" },
124 : { "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" },
125 : { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
126 : { "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" },
127 : { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
128 : #elif ARCH_AARCH64
129 : { "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" },
130 : { "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
131 : { "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
132 : #endif
133 : { NULL },
134 : };
135 : static const AVClass class = {
136 : .class_name = "cpuflags",
137 : .item_name = av_default_item_name,
138 : .option = cpuflags_opts,
139 : .version = LIBAVUTIL_VERSION_INT,
140 : };
141 :
142 0 : int flags = 0, ret;
143 0 : const AVClass *pclass = &class;
144 :
145 0 : if ((ret = av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, &flags)) < 0)
146 0 : return ret;
147 :
148 0 : return flags & INT_MAX;
149 : }
150 :
151 0 : int av_cpu_count(void)
152 : {
153 0 : int nb_cpus = 1;
154 : #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
155 : cpu_set_t cpuset;
156 :
157 : CPU_ZERO(&cpuset);
158 :
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);
168 :
169 : if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1)
170 : nb_cpus = 0;
171 : #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
172 : nb_cpus = sysconf(_SC_NPROC_ONLN);
173 : #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
174 0 : nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
175 : #endif
176 :
177 0 : return nb_cpus;
178 : }
179 :
180 : #ifdef TEST
181 :
182 : #include <stdio.h>
183 : #if HAVE_UNISTD_H
184 : #include <unistd.h>
185 : #endif
186 :
187 : #include "avstring.h"
188 :
189 : #if !HAVE_GETOPT
190 : #include "compat/getopt.c"
191 : #endif
192 :
193 : static const struct {
194 : int flag;
195 : const char *name;
196 : } cpu_flag_tab[] = {
197 : #if ARCH_AARCH64
198 : { AV_CPU_FLAG_ARMV8, "armv8" },
199 : { AV_CPU_FLAG_NEON, "neon" },
200 : { AV_CPU_FLAG_VFP, "vfp" },
201 : #elif ARCH_ARM
202 : { AV_CPU_FLAG_ARMV5TE, "armv5te" },
203 : { AV_CPU_FLAG_ARMV6, "armv6" },
204 : { AV_CPU_FLAG_ARMV6T2, "armv6t2" },
205 : { AV_CPU_FLAG_VFP, "vfp" },
206 : { AV_CPU_FLAG_VFPV3, "vfpv3" },
207 : { AV_CPU_FLAG_NEON, "neon" },
208 : #elif ARCH_PPC
209 : { AV_CPU_FLAG_ALTIVEC, "altivec" },
210 : #elif ARCH_X86
211 : { AV_CPU_FLAG_MMX, "mmx" },
212 : { AV_CPU_FLAG_MMXEXT, "mmxext" },
213 : { AV_CPU_FLAG_SSE, "sse" },
214 : { AV_CPU_FLAG_SSE2, "sse2" },
215 : { AV_CPU_FLAG_SSE2SLOW, "sse2(slow)" },
216 : { AV_CPU_FLAG_SSE3, "sse3" },
217 : { AV_CPU_FLAG_SSE3SLOW, "sse3(slow)" },
218 : { AV_CPU_FLAG_SSSE3, "ssse3" },
219 : { AV_CPU_FLAG_ATOM, "atom" },
220 : { AV_CPU_FLAG_SSE4, "sse4.1" },
221 : { AV_CPU_FLAG_SSE42, "sse4.2" },
222 : { AV_CPU_FLAG_AVX, "avx" },
223 : { AV_CPU_FLAG_XOP, "xop" },
224 : { AV_CPU_FLAG_FMA3, "fma3" },
225 : { AV_CPU_FLAG_FMA4, "fma4" },
226 : { AV_CPU_FLAG_3DNOW, "3dnow" },
227 : { AV_CPU_FLAG_3DNOWEXT, "3dnowext" },
228 : { AV_CPU_FLAG_CMOV, "cmov" },
229 : { AV_CPU_FLAG_AVX2, "avx2" },
230 : { AV_CPU_FLAG_BMI1, "bmi1" },
231 : { AV_CPU_FLAG_BMI2, "bmi2" },
232 : #endif
233 : { 0 }
234 : };
235 :
236 : static void print_cpu_flags(int cpu_flags, const char *type)
237 : {
238 : int i;
239 :
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");
246 : }
247 :
248 :
249 : int main(int argc, char **argv)
250 : {
251 : int cpu_flags_raw = av_get_cpu_flags();
252 : int cpu_flags_eff;
253 : int cpu_count = av_cpu_count();
254 : char threads[5] = "auto";
255 :
256 : if (cpu_flags_raw < 0)
257 : return 1;
258 :
259 : for (;;) {
260 : int c = getopt(argc, argv, "c:t:");
261 : if (c == -1)
262 : break;
263 : switch (c) {
264 : case 'c':
265 : {
266 : int cpuflags = av_parse_cpu_flags(optarg);
267 : if (cpuflags < 0)
268 : return 2;
269 : av_set_cpu_flags_mask(cpuflags);
270 : break;
271 : }
272 : case 't':
273 : {
274 : int len = av_strlcpy(threads, optarg, sizeof(threads));
275 : if (len >= sizeof(threads)) {
276 : fprintf(stderr, "Invalid thread count '%s'\n", optarg);
277 : return 2;
278 : }
279 : }
280 : }
281 : }
282 :
283 : cpu_flags_eff = av_get_cpu_flags();
284 :
285 : if (cpu_flags_eff < 0)
286 : return 3;
287 :
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);
291 :
292 : return 0;
293 : }
294 :
295 : #endif
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