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  1. /*
  2.  * This file is part of FFmpeg.
  3.  *
  4.  * FFmpeg is free software; you can redistribute it and/or
  5.  * modify it under the terms of the GNU Lesser General Public
  6.  * License as published by the Free Software Foundation; either
  7.  * version 2.1 of the License, or (at your option) any later version.
  8.  *
  9.  * FFmpeg is distributed in the hope that it will be useful,
  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12.  * Lesser General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU Lesser General Public
  15.  * License along with FFmpeg; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17.  */
  18.  
  19. /**
  20.  * @file
  21.  * timestamp utils, mostly useful for debugging/logging purposes
  22.  */
  23.  
  24. #ifndef AVUTIL_TIMESTAMP_H
  25. #define AVUTIL_TIMESTAMP_H
  26.  
  27. #include "common.h"
  28.  
  29. #if defined(__cplusplus) && !defined(__STDC_FORMAT_MACROS) && !defined(PRId64)
  30. #error missing -D__STDC_FORMAT_MACROS / #define __STDC_FORMAT_MACROS
  31. #endif
  32.  
  33. #define AV_TS_MAX_STRING_SIZE 32
  34.  
  35. /**
  36.  * Fill the provided buffer with a string containing a timestamp
  37.  * representation.
  38.  *
  39.  * @param buf a buffer with size in bytes of at least AV_TS_MAX_STRING_SIZE
  40.  * @param ts the timestamp to represent
  41.  * @return the buffer in input
  42.  */
  43. static inline char *av_ts_make_string(char *buf, int64_t ts)
  44. {
  45.     if (ts == AV_NOPTS_VALUE) snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS");
  46.     else                      snprintf(buf, AV_TS_MAX_STRING_SIZE, "%"PRId64, ts);
  47.     return buf;
  48. }
  49.  
  50. /**
  51.  * Convenience macro, the return value should be used only directly in
  52.  * function arguments but never stand-alone.
  53.  */
  54. #define av_ts2str(ts) av_ts_make_string((char[AV_TS_MAX_STRING_SIZE]){0}, ts)
  55.  
  56. /**
  57.  * Fill the provided buffer with a string containing a timestamp time
  58.  * representation.
  59.  *
  60.  * @param buf a buffer with size in bytes of at least AV_TS_MAX_STRING_SIZE
  61.  * @param ts the timestamp to represent
  62.  * @param tb the timebase of the timestamp
  63.  * @return the buffer in input
  64.  */
  65. static inline char *av_ts_make_time_string(char *buf, int64_t ts, AVRational *tb)
  66. {
  67.     if (ts == AV_NOPTS_VALUE) snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS");
  68.     else                      snprintf(buf, AV_TS_MAX_STRING_SIZE, "%.6g", av_q2d(*tb) * ts);
  69.     return buf;
  70. }
  71.  
  72. /**
  73.  * Convenience macro, the return value should be used only directly in
  74.  * function arguments but never stand-alone.
  75.  */
  76. #define av_ts2timestr(ts, tb) av_ts_make_time_string((char[AV_TS_MAX_STRING_SIZE]){0}, ts, tb)
  77.  
  78. #endif /* AVUTIL_TIMESTAMP_H */
  79.