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libavutil/cpu.c

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00001 /*
00002  * This file is part of FFmpeg.
00003  *
00004  * FFmpeg is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU Lesser General Public
00006  * License as published by the Free Software Foundation; either
00007  * version 2.1 of the License, or (at your option) any later version.
00008  *
00009  * FFmpeg is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * Lesser General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU Lesser General Public
00015  * License along with FFmpeg; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00017  */
00018 
00019 #include "cpu.h"
00020 #include "config.h"
00021 
00022 static int flags, checked;
00023 
00024 void av_force_cpu_flags(int arg){
00025     flags   = arg;
00026     checked = 1;
00027 }
00028 
00029 int av_get_cpu_flags(void)
00030 {
00031     if (checked)
00032         return flags;
00033 
00034     if (ARCH_ARM) flags = ff_get_cpu_flags_arm();
00035     if (ARCH_PPC) flags = ff_get_cpu_flags_ppc();
00036     if (ARCH_X86) flags = ff_get_cpu_flags_x86();
00037 
00038     checked = 1;
00039     return flags;
00040 }
00041 
00042 #ifdef TEST
00043 
00044 #undef printf
00045 #include <stdio.h>
00046 
00047 static const struct {
00048     int flag;
00049     const char *name;
00050 } cpu_flag_tab[] = {
00051 #if   ARCH_ARM
00052     { AV_CPU_FLAG_IWMMXT,    "iwmmxt"     },
00053 #elif ARCH_PPC
00054     { AV_CPU_FLAG_ALTIVEC,   "altivec"    },
00055 #elif ARCH_X86
00056     { AV_CPU_FLAG_MMX,       "mmx"        },
00057     { AV_CPU_FLAG_MMX2,      "mmx2"       },
00058     { AV_CPU_FLAG_SSE,       "sse"        },
00059     { AV_CPU_FLAG_SSE2,      "sse2"       },
00060     { AV_CPU_FLAG_SSE2SLOW,  "sse2(slow)" },
00061     { AV_CPU_FLAG_SSE3,      "sse3"       },
00062     { AV_CPU_FLAG_SSE3SLOW,  "sse3(slow)" },
00063     { AV_CPU_FLAG_SSSE3,     "ssse3"      },
00064     { AV_CPU_FLAG_ATOM,      "atom"       },
00065     { AV_CPU_FLAG_SSE4,      "sse4.1"     },
00066     { AV_CPU_FLAG_SSE42,     "sse4.2"     },
00067     { AV_CPU_FLAG_AVX,       "avx"        },
00068     { AV_CPU_FLAG_XOP,       "xop"        },
00069     { AV_CPU_FLAG_FMA4,      "fma4"       },
00070     { AV_CPU_FLAG_3DNOW,     "3dnow"      },
00071     { AV_CPU_FLAG_3DNOWEXT,  "3dnowext"   },
00072 #endif
00073     { 0 }
00074 };
00075 
00076 int main(void)
00077 {
00078     int cpu_flags = av_get_cpu_flags();
00079     int i;
00080 
00081     printf("cpu_flags = 0x%08X\n", cpu_flags);
00082     printf("cpu_flags =");
00083     for (i = 0; cpu_flag_tab[i].flag; i++)
00084         if (cpu_flags & cpu_flag_tab[i].flag)
00085             printf(" %s", cpu_flag_tab[i].name);
00086     printf("\n");
00087 
00088     return 0;
00089 }
00090 
00091 #endif
Generated on Fri Feb 1 2013 14:34:55 for FFmpeg by doxygen 1.7.1