[FFmpeg-devel] [PATCH v3 2/4] avutil/timer: Add clock_gettime as a fallback of AV_READ_TIME

[Rémi Denis-Courmont]

Le perjantaina 7. kesäkuuta 2024, 16.44.50 EEST Zhao Zhili a écrit :
> From: Zhao Zhili <zhilizhao at tencent.com>
> 
> ---
> v3: add ff_read_time() rather than use av_gettime_relative() to get
> nanosecond precision.
> 
>  libavutil/timer.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/libavutil/timer.h b/libavutil/timer.h
> index 2cd299eca3..3e5d5ef23f 100644
> --- a/libavutil/timer.h
> +++ b/libavutil/timer.h
> @@ -46,6 +46,8 @@
>  #include "macos_kperf.h"
>  #elif HAVE_MACH_ABSOLUTE_TIME
>  #include <mach/mach_time.h>
> +#elif HAVE_CLOCK_GETTIME
> +#include <time.h>
>  #endif
> 
>  #include "common.h"
> @@ -70,6 +72,14 @@
>  #       define AV_READ_TIME gethrtime
>  #   elif HAVE_MACH_ABSOLUTE_TIME
>  #       define AV_READ_TIME mach_absolute_time
> +#   elif HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)
> +        static inline int64_t ff_read_time(void)
> +        {
> +            struct timespec ts;
> +            clock_gettime(CLOCK_MONOTONIC, &ts);
> +            return (int64_t) ts.tv_sec * 1000000000 + ts.tv_nsec;

Wouldn't INT64_C() be more idiomatic here?

> +        }
> +#       define AV_READ_TIME ff_read_time
>  #   endif
>  #endif


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