diff options
| author | Mathieu Duponchelle <mathieu.duponchelle@opencreed.com> | 2015-02-12 22:06:17 +0100 |
|---|---|---|
| committer | Mathieu Duponchelle <mathieu.duponchelle@opencreed.com> | 2015-02-12 22:47:26 +0100 |
| commit | 7ca6d9634a8df45e9ad28f572e36a8d5e697b413 (patch) | |
| tree | 14de91ef4e87a8cfa944953abd2acbe08acf045f | |
| parent | 6b864813cce885e8fb900041f73dcf4e5264d3db (diff) | |
dashdemux: Fix handling of live streams with timeshift buffers.
By implementing get_live_seek_range.
As shown by :
gst-validate-1.0 playbin \
uri=http://dev-iplatforms.kw.bbc.co.uk/dash/news24-avc3/news24.php
This patch handles live seeking, by setting a live seek range
comprised between now - timeShiftBufferDepth and now.
The inteersting thing with this stream is that one can actually
ask fragments up to availabilityStartTime, but it seems quite clear
in the spec that content is only guaranteed to exist up to
timeShiftBufferDepth.
One can test live seeking this way :
gst-validate-1.0 playbin \
uri=http://dev-iplatforms.kw.bbc.co.uk/dash/news24-avc3/news24.php \
--set-scenario seek_back.scenario
with scenario being:
description, seek=true
seek, playback-time=position+5.0, start="position-600.0",
flags=accurate+flush
This example will play the stream, wait for five seconds, then seek back
to a position 10 minutes earlier.
https://bugzilla.gnome.org/show_bug.cgi?id=744362
| -rw-r--r-- | ext/dash/gstdashdemux.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/ext/dash/gstdashdemux.c b/ext/dash/gstdashdemux.c index 12f5d6069..fca120c1b 100644 --- a/ext/dash/gstdashdemux.c +++ b/ext/dash/gstdashdemux.c @@ -262,6 +262,25 @@ gst_dash_demux_dispose (GObject * obj) G_OBJECT_CLASS (parent_class)->dispose (obj); } +static gboolean +gst_dash_demux_get_live_seek_range (GstAdaptiveDemux * demux, gint64 * start, + gint64 * stop) +{ + GstDashDemux *self = GST_DASH_DEMUX (demux); + GDateTime *now = g_date_time_new_now_utc (); + GDateTime *mstart = + gst_date_time_to_g_date_time (self->client->mpd_node->availabilityStartTime); + GTimeSpan stream_now; + + stream_now = g_date_time_difference (now, mstart); + g_date_time_unref (now); + g_date_time_unref (mstart); + *stop = stream_now * GST_USECOND; + + *start = *stop - (self->client->mpd_node->timeShiftBufferDepth * GST_MSECOND); + return TRUE; +} + static void gst_dash_demux_class_init (GstDashDemuxClass * klass) { @@ -338,6 +357,7 @@ gst_dash_demux_class_init (GstDashDemuxClass * klass) gstadaptivedemux_class->stream_update_fragment_info = gst_dash_demux_stream_update_fragment_info; gstadaptivedemux_class->stream_free = gst_dash_demux_stream_free; + gstadaptivedemux_class->get_live_seek_range = gst_dash_demux_get_live_seek_range; } static void |