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Merge commit '375ef6528c'

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* commit '375ef6528c':
  libfdk-aacenc: Actually check for upper bounds of cutoff
  arm: Fall back to runtime cpu feature detection via /proc/cpuinfo

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-02-12 12:40:57 +01:00
commit 3ccda2b02b
1 changed files with 34 additions and 1 deletions
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35
libavutil/arm/cpu.c
View file

@ -34,6 +34,8 @@
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "libavutil/avstring.h"
#define AT_HWCAP 16
@ -66,13 +68,44 @@ static int get_hwcap(uint32_t *hwcap)
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)
return flags;
if (get_cpuinfo(&hwcap) < 0)
return flags;
#define check_cap(cap, flag) do { \
if (hwcap & HWCAP_ ## cap) \