/*****************************************************************************
* timestamps.c:
*****************************************************************************
* Copyright © 2025 VideoLabs, VideoLAN and VLC Authors
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_tick.h>
#include "../../../modules/demux/mpeg/timestamps.h"
#define ASSERT(a) do {\
if(!(a)) { \
fprintf(stderr, "failed line %d\n", __LINE__); \
return 1; } \
} while(0)
int main(void)
{
/* Should not wrap without reference */
vlc_tick_t ts1 = 50;
vlc_tick_t ts2 = TimeStampWrapAround(VLC_TICK_INVALID, ts1);
ASSERT(ts2 == ts1);
ts1 = TS_33BITS_ROLL_NZ * 3/4;
ts2 = TimeStampWrapAround(VLC_TICK_INVALID, ts1);
ASSERT(ts2 == ts1);
/* Should not wrap */
ts1 = VLC_TICK_0 + TS_33BITS_HALF_ROLL_NZ;
ts2 = TimeStampWrapAround(VLC_TICK_0, ts1);
ASSERT(ts2 == ts1);
ts1 = VLC_TICK_0 + TS_33BITS_ROLL_NZ;
ts2 = TimeStampWrapAround(VLC_TICK_0, ts1);
ASSERT(ts2 == ts1);
ts1 = VLC_TICK_0 + TS_33BITS_ROLL_NZ;
ts2 = TimeStampWrapAround(ts1, ts1);
ASSERT(ts2 == ts1);
ts1 = VLC_TICK_0 + TS_33BITS_ROLL_NZ;
ts2 = TimeStampWrapAround(ts1 - 100, ts1);
ASSERT(ts2 == ts1);
ts1 = VLC_TICK_0 + TS_33BITS_ROLL_NZ;
ts2 = TimeStampWrapAround(VLC_TICK_0 + TS_33BITS_HALF_ROLL_NZ, ts1);
ASSERT(ts2 == ts1);
/* Should wrap */
ts1 = VLC_TICK_0;
ts2 = TimeStampWrapAround(VLC_TICK_0 + TS_33BITS_HALF_ROLL_NZ, ts1);
ASSERT(ts2 > ts1);
ASSERT(ts2 == ts1 + TS_33BITS_ROLL_NZ);
ts1 = VLC_TICK_0;
ts2 = TimeStampWrapAround(VLC_TICK_0 + TS_33BITS_ROLL_NZ * 3/4, ts1);
ASSERT(ts2 == ts1 + TS_33BITS_ROLL_NZ);
ts1 = VLC_TICK_0;
ts2 = TimeStampWrapAround(VLC_TICK_0 + TS_33BITS_ROLL_NZ, ts1);
ASSERT(ts2 == ts1 + TS_33BITS_ROLL_NZ);
ts1 = VLC_TICK_0 + TS_33BITS_HALF_ROLL_NZ;
ts2 = TimeStampWrapAround(VLC_TICK_0 + TS_33BITS_ROLL_NZ, ts1);
ASSERT(ts2 == ts1 + TS_33BITS_ROLL_NZ);
/* Should wrap multiple times */
ts1 = VLC_TICK_0;
ts2 = TimeStampWrapAround(VLC_TICK_0 + TS_33BITS_ROLL_NZ * 2, ts1);
ASSERT(ts2 > ts1);
ASSERT(ts2 == ts1 + TS_33BITS_ROLL_NZ * 2);
ts1 = VLC_TICK_0 + TS_33BITS_HALF_ROLL_NZ;
ts2 = TimeStampWrapAround(VLC_TICK_0 + TS_33BITS_ROLL_NZ * 5, ts1);
ASSERT(ts2 > ts1);
ASSERT(ts2 == ts1 + TS_33BITS_ROLL_NZ * 5);
return 0;
}
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(vorverarbeitet am 2026-11-04)
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