X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmisc%2Fmtime.c;h=b85c7ef0e3cedca38b14d43142615b18a97f1fa4;hb=2915b611a1c64c6c9b3dd5dcda951e0787916ca9;hp=5ad852a2b9cf73354b5fc9b4c18f1eff441a64c6;hpb=218bc1f9815d90acfd1dc3ac5f2aafd7ac217838;p=vlc diff --git a/src/misc/mtime.c b/src/misc/mtime.c index 5ad852a2b9..b85c7ef0e3 100644 --- a/src/misc/mtime.c +++ b/src/misc/mtime.c @@ -52,14 +52,16 @@ # include #endif -#if defined( UNDER_CE ) -# include -#endif - #if defined(HAVE_SYS_TIME_H) # include #endif +#if defined(__APPLE__) && !defined(__powerpc__) && !defined(__ppc__) && !defined(__ppc64__) +#define USE_APPLE_MACH 1 +# include +# include +#endif + #if !defined(HAVE_STRUCT_TIMESPEC) struct timespec { @@ -78,9 +80,9 @@ int nanosleep(struct timespec *, struct timespec *); # if (_POSIX_CLOCK_SELECTION < 0) /* - * We cannot use the monotonic clock is clock selection is not available, + * We cannot use the monotonic clock if clock selection is not available, * as it would screw vlc_cond_timedwait() completely. Instead, we have to - * stick to the realtime clock. Nevermind it screws everything when ntpdate + * stick to the realtime clock. Nevermind it screws everything up when ntpdate * warps the wall clock. */ # undef CLOCK_MONOTONIC @@ -123,25 +125,28 @@ char *mstrtime( char *psz_buffer, mtime_t date ) * \param psz_buffer should be a buffer at least MSTRTIME_MAX_SIZE characters * \return psz_buffer is returned so this can be used as printf parameter. */ -char *secstotimestr( char *psz_buffer, int i_seconds ) +char *secstotimestr( char *psz_buffer, int32_t i_seconds ) { - int i_hours, i_mins; - i_mins = i_seconds / 60; - i_hours = i_mins / 60 ; - if( i_hours ) + if( unlikely(i_seconds < 0) ) { - snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%d:%2.2d:%2.2d", - (int) i_hours, - (int) (i_mins % 60), - (int) (i_seconds % 60) ); + secstotimestr( psz_buffer + 1, -i_seconds ); + *psz_buffer = '-'; + return psz_buffer; } + + div_t d; + + d = div( i_seconds, 60 ); + i_seconds = d.rem; + d = div( d.quot, 60 ); + + if( d.quot ) + snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%u:%02u:%02u", + d.quot, d.rem, i_seconds ); else - { - snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%2.2d:%2.2d", - (int) i_mins , - (int) (i_seconds % 60) ); - } - return( psz_buffer ); + snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%02u:%02u", + d.rem, i_seconds ); + return psz_buffer; } #if defined (HAVE_CLOCK_NANOSLEEP) @@ -172,6 +177,15 @@ static inline unsigned mprec( void ) #endif } +#ifdef USE_APPLE_MACH +static mach_timebase_info_data_t mtime_timebase_info; +static pthread_once_t mtime_timebase_info_once = PTHREAD_ONCE_INIT; +static void mtime_init_timebase(void) +{ + mach_timebase_info(&mtime_timebase_info); +} +#endif + /** * Return high precision date * @@ -197,6 +211,16 @@ mtime_t mdate( void ) #elif defined( HAVE_KERNEL_OS_H ) res = real_time_clock_usecs(); +#elif defined( USE_APPLE_MACH ) + pthread_once(&mtime_timebase_info_once, mtime_init_timebase); + uint64_t date = mach_absolute_time(); + + /* Convert to nanoseconds */ + date *= mtime_timebase_info.numer; + date /= mtime_timebase_info.denom; + + /* Convert to microseconds */ + res = date / 1000; #elif defined( WIN32 ) || defined( UNDER_CE ) /* We don't need the real date, just the value of a high precision timer */ static mtime_t freq = INT64_C(-1); @@ -303,6 +327,12 @@ mtime_t mdate( void ) i_previous_time = res; LeaveCriticalSection( &date_lock ); } +#elif defined(USE_APPLE_MACH) + /* The version that should be used, if it was cancelable */ + pthread_once(&mtime_timebase_info_once, mtime_init_timebase); + uint64_t mach_time = date * 1000 * mtime_timebase_info.denom / mtime_timebase_info.numer; + mach_wait_until(mach_time); + #else struct timeval tv_date; @@ -314,6 +344,7 @@ mtime_t mdate( void ) return res; } +#undef mwait /** * Wait for a date * @@ -372,27 +403,6 @@ void mwait( mtime_t date ) */ void msleep( mtime_t delay ) { -#ifndef NDEBUG -# if defined (__linux__) || defined (WIN32) - /* We assume that proper use of msleep() will not use a constant period... - * Media synchronization is likely to use mwait() with at least slight - * sleep length variation at microsecond precision. Network protocols - * normally have exponential backoffs, or long delays. */ - static __thread unsigned tick_period = 0; - static __thread unsigned tick_frequency = 0; - if (tick_period != delay) - tick_frequency = 0; - tick_frequency++; - tick_period = delay; - if (delay < (29 * CLOCK_FREQ) && tick_frequency == 20) - { - fprintf (stderr, "Likely bogus delay(%"PRIu64"µs) ", delay); - vlc_backtrace (); - } - //fprintf (stderr, "%u, %u\n", tick_period, tick_frequency); -# endif -#endif - #if defined( HAVE_CLOCK_NANOSLEEP ) lldiv_t d = lldiv( delay, 1000000 ); struct timespec ts = { d.quot, d.rem * 1000 }; @@ -419,6 +429,12 @@ void msleep( mtime_t delay ) while( nanosleep( &ts_delay, &ts_delay ) && ( errno == EINTR ) ); +#elif defined (USE_APPLE_MACH) + /* The version that should be used, if it was cancelable */ + pthread_once(&mtime_timebase_info_once, mtime_init_timebase); + uint64_t mach_time = delay * 1000 * mtime_timebase_info.denom / mtime_timebase_info.numer; + mach_wait_until(mach_time + mach_absolute_time()); + #else struct timeval tv_delay; @@ -526,6 +542,33 @@ mtime_t date_Increment( date_t *p_date, uint32_t i_nb_samples ) return p_date->date; } +/** + * Decrement the date and return the result, taking into account + * rounding errors. + * + * \param date to decrement + * \param decrementation in number of samples + * \return date value + */ +mtime_t date_Decrement( date_t *p_date, uint32_t i_nb_samples ) +{ + mtime_t i_dividend = (mtime_t)i_nb_samples * 1000000 * p_date->i_divider_den; + p_date->date -= i_dividend / p_date->i_divider_num; + unsigned i_rem_adjust = i_dividend % p_date->i_divider_num; + + if( p_date->i_remainder < i_rem_adjust ) + { + /* This is Bresenham algorithm. */ + assert( p_date->i_remainder > -p_date->i_divider_num); + p_date->date -= 1; + p_date->i_remainder += p_date->i_divider_num; + } + + p_date->i_remainder -= i_rem_adjust; + + return p_date->date; +} + #ifndef HAVE_GETTIMEOFDAY #ifdef WIN32