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qtdemux: Parse and use creation time tag from mvhd

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Expose creation time from mvhd as a datetime tag

Fixes #634928
This commit is contained in:
Thiago Santos 2010-11-16 17:48:16 -03:00
parent be2d04e040
commit 6511730ba1
1 changed files with 35 additions and 4 deletions
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39
gst/qtdemux/qtdemux.c
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@ -79,6 +79,12 @@
/* if the sample index is larger than this, something is likely wrong */
#define QTDEMUX_MAX_SAMPLE_INDEX_SIZE (50*1024*1024)
/* For converting qt creation times to unix epoch times */
#define QTDEMUX_SECONDS_PER_DAY (60 * 60 * 24)
#define QTDEMUX_LEAP_YEARS_FROM_1904_TO_1970 17
#define QTDEMUX_SECONDS_FROM_1904_TO_1970 (((1970 - 1904) * (guint64) 365 + \
QTDEMUX_LEAP_YEARS_FROM_1904_TO_1970) * QTDEMUX_SECONDS_PER_DAY)
GST_DEBUG_CATEGORY (qtdemux_debug);
/*typedef struct _QtNode QtNode; */
@ -4239,7 +4245,7 @@ qtdemux_stbl_init (GstQTDemux * qtdemux, QtDemuxStream * stream, GNode * stbl)
/* sync sample atom */
stream->stps_present = FALSE;
if ((stream->stss_present =
! !qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stss,
!!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stss,
&stream->stss) ? TRUE : FALSE) == TRUE) {
/* copy atom data into a new buffer for later use */
stream->stss.data = g_memdup (stream->stss.data, stream->stss.size);
@ -4257,7 +4263,7 @@ qtdemux_stbl_init (GstQTDemux * qtdemux, QtDemuxStream * stream, GNode * stbl)
/* partial sync sample atom */
if ((stream->stps_present =
! !qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stps,
!!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stps,
&stream->stps) ? TRUE : FALSE) == TRUE) {
/* copy atom data into a new buffer for later use */
stream->stps.data = g_memdup (stream->stps.data, stream->stps.size);
@ -4381,7 +4387,7 @@ qtdemux_stbl_init (GstQTDemux * qtdemux, QtDemuxStream * stream, GNode * stbl)
/* composition time-to-sample */
if ((stream->ctts_present =
! !qtdemux_tree_get_child_by_type_full (stbl, FOURCC_ctts,
!!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_ctts,
&stream->ctts) ? TRUE : FALSE) == TRUE) {
/* copy atom data into a new buffer for later use */
stream->ctts.data = g_memdup (stream->ctts.data, stream->ctts.size);
@ -7004,7 +7010,8 @@ qtdemux_parse_udta (GstQTDemux * qtdemux, GNode * udta)
}
GST_DEBUG_OBJECT (qtdemux, "new tag list");
qtdemux->tag_list = gst_tag_list_new ();
if (!qtdemux->tag_list)
qtdemux->tag_list = gst_tag_list_new ();
i = 0;
while (i < G_N_ELEMENTS (add_funcs)) {
@ -7255,6 +7262,8 @@ qtdemux_parse_tree (GstQTDemux * qtdemux)
GNode *trak;
GNode *udta;
gint64 duration;
guint64 creation_time;
GstDateTime *datetime = NULL;
gint version;
mvhd = qtdemux_tree_get_child_by_type (qtdemux->moov_node, FOURCC_mvhd);
@ -7265,9 +7274,11 @@ qtdemux_parse_tree (GstQTDemux * qtdemux)
version = QT_UINT8 ((guint8 *) mvhd->data + 8);
if (version == 1) {
creation_time = QT_UINT64 ((guint8 *) mvhd->data + 12);
qtdemux->timescale = QT_UINT32 ((guint8 *) mvhd->data + 28);
qtdemux->duration = QT_UINT64 ((guint8 *) mvhd->data + 32);
} else if (version == 0) {
creation_time = QT_UINT32 ((guint8 *) mvhd->data + 12);
qtdemux->timescale = QT_UINT32 ((guint8 *) mvhd->data + 20);
qtdemux->duration = QT_UINT32 ((guint8 *) mvhd->data + 24);
} else {
@ -7275,6 +7286,26 @@ qtdemux_parse_tree (GstQTDemux * qtdemux)
return FALSE;
}
/* Moving qt creation time (secs since 1904) to unix time */
if (creation_time != 0) {
if (creation_time > QTDEMUX_SECONDS_FROM_1904_TO_1970) {
creation_time -= QTDEMUX_SECONDS_FROM_1904_TO_1970;
datetime = gst_date_time_new_from_unix_epoch_local_time (creation_time);
} else {
GST_WARNING_OBJECT (qtdemux, "Can't handle datetimes before 1970 yet, "
"please file a bug at http://bugzilla.gnome.org");
}
}
if (datetime) {
if (!qtdemux->tag_list)
qtdemux->tag_list = gst_tag_list_new ();
/* Use KEEP as explicit tags should have a higher priority than mvhd tag */
gst_tag_list_add (qtdemux->tag_list, GST_TAG_MERGE_KEEP, GST_TAG_DATE_TIME,
datetime, NULL);
gst_date_time_unref (datetime);
}
GST_INFO_OBJECT (qtdemux, "timescale: %u", qtdemux->timescale);
GST_INFO_OBJECT (qtdemux, "duration: %" G_GUINT64_FORMAT, qtdemux->duration);