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avformat/utils: add a function to standardize creation time

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This can be used for formats which write all format metadata as string to
files, therefore non-standard creation times such as 'now' will be parsed.

The standardized creation time is UTC ISO 8601 with microsecond precision.

Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2016-02-22 03:13:20 +01:00
parent 3af71ac3f9
commit e7dd97b5d8
3 changed files with 31 additions and 1 deletions
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8
libavformat/internal.h
View File

@ -560,6 +560,14 @@ void ff_format_io_close(AVFormatContext *s, AVIOContext **pb);
*/
int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
/**
* Standardize creation_time metadata in AVFormatContext to an ISO-8601
* timestamp string.
*
* @param s AVFormatContext
* @return <0 on error
*/
int ff_standardize_creation_time(AVFormatContext *s);
#define CONTAINS_PAL 2
/**

22
libavformat/utils.c
View File

@ -33,6 +33,7 @@
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/time.h"
#include "libavutil/time_internal.h"
#include "libavutil/timestamp.h"
#include "libavcodec/bytestream.h"
@ -4760,6 +4761,27 @@ int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int
return 0;
}
int ff_standardize_creation_time(AVFormatContext *s)
{
int64_t timestamp;
int ret = ff_parse_creation_time_metadata(s, &timestamp, 0);
if (ret == 1) {
time_t seconds = timestamp / 1000000;
struct tm *ptm, tmbuf;
ptm = gmtime_r(&seconds, &tmbuf);
if (ptm) {
char buf[32];
if (!strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", ptm))
return AVERROR_EXTERNAL;
av_strlcatf(buf, sizeof(buf), ".%06dZ", (int)(timestamp % 1000000));
av_dict_set(&s->metadata, "creation_time", buf, 0);
} else {
return AVERROR_EXTERNAL;
}
}
return ret;
}
int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, const uint8_t **palette)
{
int size;

2
libavformat/version.h
View File

@ -31,7 +31,7 @@
#define LIBAVFORMAT_VERSION_MAJOR 57
#define LIBAVFORMAT_VERSION_MINOR 27
#define LIBAVFORMAT_VERSION_MICRO 101
#define LIBAVFORMAT_VERSION_MICRO 102
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \