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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. #define AV_TS_MAX_STRING_SIZE 32
  30.  
  31. /**
  32.  * Fill the provided buffer with a string containing a timestamp
  33.  * representation.
  34.  *
  35.  * @param buf a buffer with size in bytes of at least AV_TS_MAX_STRING_SIZE
  36.  * @param ts the timestamp to represent
  37.  * @return the buffer in input
  38.  */
  39. static inline char *av_ts_make_string(char *buf, int64_t ts)
  40. {
  41.     if (ts == AV_NOPTS_VALUE) snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS");
  42.     else                      snprintf(buf, AV_TS_MAX_STRING_SIZE, "%"PRId64, ts);
  43.     return buf;
  44. }
  45.  
  46. /**
  47.  * Convenience macro, the return value should be used only directly in
  48.  * function arguments but never stand-alone.
  49.  */
  50. #define av_ts2str(ts) av_ts_make_string((char[AV_TS_MAX_STRING_SIZE]){0}, ts)
  51.  
  52. /**
  53.  * Fill the provided buffer with a string containing a timestamp time
  54.  * representation.
  55.  *
  56.  * @param buf a buffer with size in bytes of at least AV_TS_MAX_STRING_SIZE
  57.  * @param ts the timestamp to represent
  58.  * @param tb the timebase of the timestamp
  59.  * @return the buffer in input
  60.  */
  61. static inline char *av_ts_make_time_string(char *buf, int64_t ts, AVRational *tb)
  62. {
  63.     if (ts == AV_NOPTS_VALUE) snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS");
  64.     else                      snprintf(buf, AV_TS_MAX_STRING_SIZE, "%.6g", av_q2d(*tb) * ts);
  65.     return buf;
  66. }
  67.  
  68. /**
  69.  * Convenience macro, the return value should be used only directly in
  70.  * function arguments but never stand-alone.
  71.  */
  72. #define av_ts2timestr(ts, tb) av_ts_make_time_string((char[AV_TS_MAX_STRING_SIZE]){0}, ts, tb)
  73.  
  74. #endif /* AVUTIL_TIMESTAMP_H */
  75.