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comparison lib/libavutil/timestamp.h @ 2134:992d2e6f907d

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preparation for libavcodec
author zipi
date Tue, 31 Dec 2013 14:52:14 +0000
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2133:e378232bfd36 2134:992d2e6f907d
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 */