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klvinject: use unix reference timestamp if available

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This commit is contained in:
Joshua M. Doe 2020-03-06 14:44:15 -05:00
parent 8830751c52
commit e886b5f4fa
1 changed files with 17 additions and 6 deletions
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23
gst/klv/gstklvinject.c
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@ -100,6 +100,8 @@ gst_klvinject_dispose (GstKlvInject * filt)
{
}
static GstStaticCaps unix_reference = GST_STATIC_CAPS ("timestamp/x-unix");
static void
gst_klvinject_add_test_meta (GstKlvInject * filt, GstBuffer * buf)
{
@ -109,11 +111,22 @@ gst_klvinject_add_test_meta (GstKlvInject * filt, GstBuffer * buf)
const guint8 klv_header[16] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x0b, 0x01,
0x01, 0x0e, 0x01, 0x03, 0x01, 0x01, 0x00, 0x00, 0x00
};
GDateTime *dt = g_date_time_new_now_utc ();
gint64 ut = g_date_time_to_unix (dt) * 1000000; /* microseconds */
GstByteWriter bw;
GstReferenceTimestampMeta *time_meta;
gint64 utc_us;
ut += g_date_time_get_microsecond (dt);
/* NOTE: MISB defines MISP time, which is NOT UTC, but use UTC for now */
time_meta =
gst_buffer_get_reference_timestamp_meta (buf,
gst_static_caps_get (&unix_reference));
if (time_meta) {
utc_us = time_meta->timestamp / 1000;
} else {
GDateTime *dt = g_date_time_new_now_utc ();
utc_us = g_date_time_to_unix (dt) * 1000000; /* microseconds */
utc_us += g_date_time_get_microsecond (dt);
g_date_time_unref (dt);
}
gst_byte_writer_init (&bw);
@ -127,7 +140,7 @@ gst_klvinject_add_test_meta (GstKlvInject * filt, GstBuffer * buf)
/* Tag 1: unix timestamp */
gst_byte_writer_put_uint8 (&bw, 2); /* local tag: unix timestamp */
gst_byte_writer_put_uint8 (&bw, 8); /* data length (BER short form) */
gst_byte_writer_put_uint64_be (&bw, ut);
gst_byte_writer_put_uint64_be (&bw, utc_us);
/* Tag 2: Image Coordinate System */
gst_byte_writer_put_uint8 (&bw, 12); /* local tag: unix timestamp */
@ -170,8 +183,6 @@ gst_klvinject_add_test_meta (GstKlvInject * filt, GstBuffer * buf)
gst_buffer_add_klv_meta_take_data (buf, klv_data, klv_size);
}
g_date_time_unref (dt);
}
static GstFlowReturn