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qtdemux: handle empty segments in seeking adjust

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If seeking targets an empty segment skip it as there is no media
offset to get from it. Instead look for the next one.

This doesn't make seeking in push-mode work if you seek to an
empty segment but at least won't get you to wrong offsets.

https://bugzilla.gnome.org/show_bug.cgi?id=753484
This commit is contained in:
Thiago Santos 2015-08-10 18:14:39 -03:00 committed by Luis de Bethencourt
parent 5e4caca709
commit df0a31b4ee
1 changed files with 45 additions and 24 deletions
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25
gst/isomp4/qtdemux.c
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@ -1234,6 +1234,7 @@ gst_qtdemux_adjust_seek (GstQTDemux * qtdemux, gint64 desired_time,
GstClockTime media_time;
GstClockTime seg_time;
QtDemuxSegment *seg;
gboolean empty_segment = FALSE;
str = qtdemux->streams[n];
@ -1247,15 +1248,34 @@ gst_qtdemux_adjust_seek (GstQTDemux * qtdemux, gint64 desired_time,
seg = &str->segments[seg_idx];
seg_time = desired_time - seg->time;
while (QTSEGMENT_IS_EMPTY (seg)) {
seg_time = 0;
empty_segment = TRUE;
GST_DEBUG_OBJECT (str->pad, "Segment %d is empty, moving to next one",
seg_idx);
seg_idx++;
if (seg_idx == str->n_segments)
break;
seg = &str->segments[seg_idx];
}
if (seg_idx == str->n_segments) {
/* FIXME track shouldn't have the last segment as empty, but if it
* happens we better handle it */
continue;
}
/* get the media time in the segment */
media_start = seg->media_start + seg_time;
/* get the index of the sample with media time */
index = gst_qtdemux_find_index_linear (qtdemux, str, media_start);
GST_DEBUG_OBJECT (qtdemux, "sample for %" GST_TIME_FORMAT " at %u"
" at offset %" G_GUINT64_FORMAT,
GST_TIME_ARGS (media_start), index, str->samples[index].offset);
" at offset %" G_GUINT64_FORMAT " (empty segment: %d)",
GST_TIME_ARGS (media_start), index, str->samples[index].offset,
empty_segment);
if (!empty_segment) {
/* find previous keyframe */
kindex = gst_qtdemux_find_keyframe (qtdemux, str, index);
@ -1284,6 +1304,7 @@ gst_qtdemux_adjust_seek (GstQTDemux * qtdemux, gint64 desired_time,
min_offset = seg_time;
}
}
}
if (min_byte_offset < 0 || str->samples[index].offset < min_byte_offset)
min_byte_offset = str->samples[index].offset;