text: /*
   * This file is part of FFmpeg.
   *
   * FFmpeg 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.
   *
   * FFmpeg 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 FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  /**
   * @file
   * timestamp utils, mostly useful for debugging/logging purposes
   */
  
  #ifndef AVUTIL_TIMESTAMP_H
  #define AVUTIL_TIMESTAMP_H
  
  #include "common.h"
  
  #if defined(__cplusplus) && !defined(__STDC_FORMAT_MACROS) && !defined(PRId64)
  #error missing -D__STDC_FORMAT_MACROS / #define __STDC_FORMAT_MACROS
  #endif
  
  #define AV_TS_MAX_STRING_SIZE 32
  
  #include <inttypes.h>
  
  /**
   * Fill the provided buffer with a string containing a timestamp
   * representation.
   *
   * @param buf a buffer with size in bytes of at least AV_TS_MAX_STRING_SIZE
   * @param ts the timestamp to represent
   * @return the buffer in input
   */
  static inline char *av_ts_make_string(char *buf, int64_t ts)
  {
      if (ts == AV_NOPTS_VALUE) snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS");
      else                      snprintf(buf, AV_TS_MAX_STRING_SIZE, "%ld", ts);
      return buf;
  }
  
  //char * av_ts_make_string_my(char *buf, int64_t ts)
  //{
  //	//char buf[AV_TS_MAX_STRING_SIZE];
  //	if (ts == AV_NOPTS_VALUE) snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS");
  //	else                      snprintf(buf, AV_TS_MAX_STRING_SIZE, "%ld", ts);
  //		return buf;
  //}
  
  /**
   * Convenience macro, the return value should be used only directly in
   * function arguments but never stand-alone.
   */
  #define av_ts2str(ts) av_ts_make_string(char[AV_TS_MAX_STRING_SIZE]{0}, ts)
  //#define av_ts2str(ts)    \
  //	av_ts_make_string_my(ts)
  
  
  /**
   * Fill the provided buffer with a string containing a timestamp time
   * representation.
   *
   * @param buf a buffer with size in bytes of at least AV_TS_MAX_STRING_SIZE
   * @param ts the timestamp to represent
   * @param tb the timebase of the timestamp
   * @return the buffer in input
   */
  static inline char *av_ts_make_time_string(char *buf, int64_t ts, AVRational *tb)
  {
      if (ts == AV_NOPTS_VALUE) snprintf(buf, AV_TS_MAX_STRING_SIZE, "NOPTS");
      else                      snprintf(buf, AV_TS_MAX_STRING_SIZE, "%.6lf", av_q2d(*tb) * ts);
      return buf;
  }
  
  /**
   * Convenience macro, the return value should be used only directly in
   * function arguments but never stand-alone.
   */
  #define av_ts2timestr(ts, tb) av_ts_make_time_string((char[AV_TS_MAX_STRING_SIZE]){0}, ts, tb)
  
  #endif /* AVUTIL_TIMESTAMP_H */
  