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qtdemux: improve mss_mode/fragmented special handling

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Make it clear what should be handled purely by mss mode:
1) Expose the streams on the first moof as there are no moov atoms
2) Properly cleanup streams on flushes

Add a note about the meaning of upstream_newsegment and mss_mode
for future reference.

Make all other special fragment handling shared for both dash
and mss streams.
This commit is contained in:
Thiago Santos 2013-12-27 02:14:02 -03:00
parent a82f3418fd
commit c1cd2f81f9
2 changed files with 15 additions and 11 deletions
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17
gst/isomp4/qtdemux.c
View file

@ -911,7 +911,6 @@ gst_qtdemux_push_pending_newsegment (GstQTDemux * qtdemux)
if (qtdemux->pending_newsegment) {
gst_qtdemux_push_event (qtdemux, qtdemux->pending_newsegment);
qtdemux->pending_newsegment = NULL;
qtdemux->upstream_newsegment = FALSE;
}
}
@ -1559,7 +1558,7 @@ gst_qtdemux_handle_src_event (GstPad * pad, GstObject * parent,
GstClockTime ts = gst_util_get_timestamp ();
#endif
if (qtdemux->mss_mode || qtdemux->fragmented) {
if (qtdemux->upstream_newsegment || qtdemux->fragmented) {
/* seek should be handled by upstream, we might need to re-download fragments */
GST_DEBUG_OBJECT (qtdemux,
"leting upstream handle seek for smoothstreaming");
@ -1789,6 +1788,8 @@ gst_qtdemux_setcaps (GstQTDemux * demux, GstCaps * caps)
}
}
gst_caps_replace (&demux->media_caps, (GstCaps *) mediacaps);
} else {
demux->mss_mode = FALSE;
}
return TRUE;
@ -1802,7 +1803,7 @@ gst_qtdemux_reset (GstQTDemux * qtdemux, gboolean hard)
GST_DEBUG_OBJECT (qtdemux, "Resetting demux");
gst_pad_stop_task (qtdemux->sinkpad);
if (hard || qtdemux->mss_mode) {
if (hard || qtdemux->upstream_newsegment) {
qtdemux->state = QTDEMUX_STATE_INITIAL;
qtdemux->neededbytes = 16;
qtdemux->todrop = 0;
@ -1839,7 +1840,7 @@ gst_qtdemux_reset (GstQTDemux * qtdemux, gboolean hard)
if (qtdemux->pending_newsegment)
gst_event_unref (qtdemux->pending_newsegment);
qtdemux->pending_newsegment = NULL;
qtdemux->upstream_newsegment = TRUE;
qtdemux->upstream_newsegment = FALSE;
qtdemux->upstream_seekable = FALSE;
qtdemux->upstream_size = 0;
@ -1914,11 +1915,9 @@ gst_qtdemux_handle_sink_event (GstPad * sinkpad, GstObject * parent,
} else {
GST_DEBUG_OBJECT (demux, "Not storing upstream newsegment, "
"not in time format");
}
/* chain will send initial newsegment after pads have been added */
if (demux->state != QTDEMUX_STATE_MOVIE || !demux->n_streams) {
if (!demux->mss_mode) {
/* chain will send initial newsegment after pads have been added */
if (demux->state != QTDEMUX_STATE_MOVIE || !demux->n_streams) {
GST_DEBUG_OBJECT (demux, "still starting, eating event");
goto exit;
}
@ -2002,7 +2001,7 @@ gst_qtdemux_handle_sink_event (GstPad * sinkpad, GstObject * parent,
demux->neededbytes = demux->todrop + stream->samples[idx].size;
} else {
/* set up for EOS */
if (demux->mss_mode) {
if (demux->upstream_newsegment) {
demux->neededbytes = 16;
} else {
demux->neededbytes = -1;

9
gst/isomp4/qtdemux.h
View file

@ -114,7 +114,10 @@ struct _GstQTDemux {
/* configured playback region */
GstSegment segment;
GstEvent *pending_newsegment;
gboolean upstream_newsegment;
gboolean upstream_newsegment; /* qtdemux received upstream
* newsegment in TIME format which likely
* means that upstream is driving the pipeline
* (adaptive demuxers) */
gint64 seek_offset;
gint64 push_seek_start;
gint64 push_seek_stop;
@ -132,7 +135,9 @@ struct _GstQTDemux {
* upstream provides it at the caps */
GstCaps *media_caps;
gboolean exposed;
gboolean mss_mode; /* flag to indicate that we're working with a smoothstreaming fragment */
gboolean mss_mode; /* flag to indicate that we're working with a smoothstreaming fragment
* Mss doesn't have 'moov' or any information about the streams format,
* requiring qtdemux to expose and create the streams */
guint64 fragment_start;
guint64 fragment_start_offset;