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arm/aarch64: Use mach_absolute_time as timer on apple platforms

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This is much less precise than the cycle counter register, but
the cycle counter register is not available on apple platforms
(and on linux, it requires a kernel module for allowing user mode
access).

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2021-02-12 12:27:03 +02:00
parent 5ca40d6d94
commit ee040a7fc2
2 changed files with 14 additions and 2 deletions
libavutil
aarch64
timer.h
arm
timer.h

8
libavutil/aarch64/timer.h

@ -24,7 +24,13 @@
#include <stdint.h>
#include "config.h"
#if HAVE_INLINE_ASM
#if defined(__APPLE__)
#include <mach/mach_time.h>
#define AV_READ_TIME mach_absolute_time
#elif HAVE_INLINE_ASM
#define AV_READ_TIME read_time

8
libavutil/arm/timer.h

@ -24,7 +24,13 @@
#include <stdint.h>
#include "config.h"
#if HAVE_INLINE_ASM && defined(__ARM_ARCH_7A__)
#if defined(__APPLE__)
#include <mach/mach_time.h>
#define AV_READ_TIME mach_absolute_time
#elif HAVE_INLINE_ASM && defined(__ARM_ARCH_7A__)
#define AV_READ_TIME read_time