diff options
Diffstat (limited to 'ffmpeg/libavutil/arm/cpu.c')
| -rw-r--r-- | ffmpeg/libavutil/arm/cpu.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/ffmpeg/libavutil/arm/cpu.c b/ffmpeg/libavutil/arm/cpu.c deleted file mode 100644 index 3f7674b..0000000 --- a/ffmpeg/libavutil/arm/cpu.c +++ /dev/null @@ -1,147 +0,0 @@ -/* - * This file is part of FFmpeg. - * - * FFmpeg 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. - * - * FFmpeg 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 FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libavutil/cpu.h" -#include "libavutil/cpu_internal.h" -#include "config.h" - -#define CORE_FLAG(f) \ - (AV_CPU_FLAG_ ## f * (HAVE_ ## f ## _EXTERNAL || HAVE_ ## f ## _INLINE)) - -#define CORE_CPU_FLAGS \ - (CORE_FLAG(ARMV5TE) | \ - CORE_FLAG(ARMV6) | \ - CORE_FLAG(ARMV6T2) | \ - CORE_FLAG(VFP) | \ - CORE_FLAG(VFPV3) | \ - CORE_FLAG(NEON)) - -#if defined __linux__ || defined __ANDROID__ - -#include <stdint.h> -#include <stdio.h> -#include <string.h> -#include "libavutil/avstring.h" - -#define AT_HWCAP 16 - -/* Relevant HWCAP values from kernel headers */ -#define HWCAP_VFP (1 << 6) -#define HWCAP_EDSP (1 << 7) -#define HWCAP_THUMBEE (1 << 11) -#define HWCAP_NEON (1 << 12) -#define HWCAP_VFPv3 (1 << 13) -#define HWCAP_TLS (1 << 15) - -static int get_hwcap(uint32_t *hwcap) -{ - struct { uint32_t a_type; uint32_t a_val; } auxv; - FILE *f = fopen("/proc/self/auxv", "r"); - int err = -1; - - if (!f) - return -1; - - while (fread(&auxv, sizeof(auxv), 1, f) > 0) { - if (auxv.a_type == AT_HWCAP) { - *hwcap = auxv.a_val; - err = 0; - break; - } - } - - fclose(f); - return err; -} - -static int get_cpuinfo(uint32_t *hwcap) -{ - FILE *f = fopen("/proc/cpuinfo", "r"); - char buf[200]; - - if (!f) - return -1; - - *hwcap = 0; - while (fgets(buf, sizeof(buf), f)) { - if (av_strstart(buf, "Features", NULL)) { - if (strstr(buf, " edsp ")) - *hwcap |= HWCAP_EDSP; - if (strstr(buf, " tls ")) - *hwcap |= HWCAP_TLS; - if (strstr(buf, " thumbee ")) - *hwcap |= HWCAP_THUMBEE; - if (strstr(buf, " vfp ")) - *hwcap |= HWCAP_VFP; - if (strstr(buf, " vfpv3 ")) - *hwcap |= HWCAP_VFPv3; - if (strstr(buf, " neon ")) - *hwcap |= HWCAP_NEON; - break; - } - } - fclose(f); - return 0; -} - -int ff_get_cpu_flags_arm(void) -{ - int flags = CORE_CPU_FLAGS; - uint32_t hwcap; - - if (get_hwcap(&hwcap) < 0) - if (get_cpuinfo(&hwcap) < 0) - return flags; - -#define check_cap(cap, flag) do { \ - if (hwcap & HWCAP_ ## cap) \ - flags |= AV_CPU_FLAG_ ## flag; \ - } while (0) - - /* No flags explicitly indicate v6 or v6T2 so check others which - imply support. */ - check_cap(EDSP, ARMV5TE); - check_cap(TLS, ARMV6); - check_cap(THUMBEE, ARMV6T2); - check_cap(VFP, VFP); - check_cap(VFPv3, VFPV3); - check_cap(NEON, NEON); - - /* The v6 checks above are not reliable so let higher flags - trickle down. */ - if (flags & (AV_CPU_FLAG_VFPV3 | AV_CPU_FLAG_NEON)) - flags |= AV_CPU_FLAG_ARMV6T2; - if (flags & AV_CPU_FLAG_ARMV6T2) - flags |= AV_CPU_FLAG_ARMV6; - - return flags; -} - -#else - -int ff_get_cpu_flags_arm(void) -{ - return AV_CPU_FLAG_ARMV5TE * HAVE_ARMV5TE | - AV_CPU_FLAG_ARMV6 * HAVE_ARMV6 | - AV_CPU_FLAG_ARMV6T2 * HAVE_ARMV6T2 | - AV_CPU_FLAG_VFP * HAVE_VFP | - AV_CPU_FLAG_VFPV3 * HAVE_VFPV3 | - AV_CPU_FLAG_NEON * HAVE_NEON; -} - -#endif |