avformat: factorize iso 8601 timestamp writer to a dictionary avutil function

Signed-off-by: Marton Balint <cus@passwd.hu>

1 files changed, 17 insertions, 0 deletions

diff --git a/libavutil/dict.c b/libavutil/dict.c
index f70c7e0051..0ea71386e5 100644
--- a/libavutil/dict.c
+++ b/libavutil/dict.c
@@ -24,6 +24,7 @@
 #include "dict.h"
 #include "internal.h"
 #include "mem.h"
+#include "time_internal.h"
 #include "bprint.h"
 
 struct AVDictionary {
@@ -253,3 +254,19 @@ int av_dict_get_string(const AVDictionary *m, char **buffer,
     }
     return av_bprint_finalize(&bprint, buffer);
 }
+
+int avpriv_dict_set_timestamp(AVDictionary **dict, const char *key, int64_t timestamp)
+{
+    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));
+        return av_dict_set(dict, key, buf, 0);
+    } else {
+        return AVERROR_EXTERNAL;
+    }
+}