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