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qtdemux: dismember activate_segment into 2 parts

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One that updates and push a new segment, the other will move the
stream to the new segment starting position
This commit is contained in:
Thiago Santos 2016-05-04 11:37:29 -03:00
parent 83d5797a58
commit a5e02e948b
1 changed files with 88 additions and 38 deletions
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126
gst/isomp4/qtdemux.c
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@ -4365,48 +4365,20 @@ eos:
return GST_FLOW_EOS;
}
/* activate the given segment number @seg_idx of @stream at time @offset.
* @offset is an absolute global position over all the segments.
*
* This will push out a NEWSEGMENT event with the right values and
* position the stream index to the first decodable sample before
* @offset.
/*
* Gets the current qt segment start, stop and position for the
* given time offset. This is used in update_segment()
*/
static gboolean
gst_qtdemux_activate_segment (GstQTDemux * qtdemux, QtDemuxStream * stream,
guint32 seg_idx, GstClockTime offset)
static void
gst_qtdemux_stream_segment_get_boundaries (GstQTDemux * qtdemux,
QtDemuxStream * stream, GstClockTime offset,
GstClockTime * _start, GstClockTime * _stop, GstClockTime * _time)
{
GstEvent *event;
QtDemuxSegment *segment;
guint32 index, kf_index;
GstClockTime seg_time;
GstClockTime start, stop, time;
gdouble rate;
QtDemuxSegment *segment;
GST_LOG_OBJECT (stream->pad, "activate segment %d, offset %" GST_TIME_FORMAT,
seg_idx, GST_TIME_ARGS (offset));
/* update the current segment */
stream->segment_index = seg_idx;
/* get the segment */
segment = &stream->segments[seg_idx];
if (G_UNLIKELY (offset < segment->time)) {
GST_WARNING_OBJECT (stream->pad, "offset < segment->time %" GST_TIME_FORMAT,
GST_TIME_ARGS (segment->time));
return FALSE;
}
/* segment lies beyond total indicated duration */
if (G_UNLIKELY (qtdemux->segment.duration != GST_CLOCK_TIME_NONE &&
segment->time > qtdemux->segment.duration)) {
GST_WARNING_OBJECT (stream->pad, "file duration %" GST_TIME_FORMAT
" < segment->time %" GST_TIME_FORMAT,
GST_TIME_ARGS (qtdemux->segment.duration),
GST_TIME_ARGS (segment->time));
return FALSE;
}
segment = &stream->segments[stream->segment_index];
/* get time in this segment */
seg_time = offset - segment->time;
@ -4425,7 +4397,9 @@ gst_qtdemux_activate_segment (GstQTDemux * qtdemux, QtDemuxStream * stream,
* segment->media_stop is in track-time-realm.
*
* In order to compare the two, we need to bring segment.stop
* into the track-time-realm */
* into the track-time-realm
*
* FIXME - does this comment still hold? Don't see any conversion here */
stop = qtdemux->segment.stop;
if (stop == GST_CLOCK_TIME_NONE)
@ -4454,6 +4428,50 @@ gst_qtdemux_activate_segment (GstQTDemux * qtdemux, QtDemuxStream * stream,
stop = MIN (segment->media_start + seg_time, stop);
}
*_start = start;
*_stop = stop;
*_time = time;
}
/*
* Updates the qt segment used for the stream and pushes a new segment event
* downstream on this stream's pad.
*/
static gboolean
gst_qtdemux_stream_update_segment (GstQTDemux * qtdemux, QtDemuxStream * stream,
gint seg_idx, GstClockTime offset, GstClockTime * _start,
GstClockTime * _stop)
{
QtDemuxSegment *segment;
GstClockTime start = 0, stop = GST_CLOCK_TIME_NONE, time = 0;
gdouble rate;
GstEvent *event;
/* update the current segment */
stream->segment_index = seg_idx;
/* get the segment */
segment = &stream->segments[seg_idx];
if (G_UNLIKELY (offset < segment->time)) {
GST_WARNING_OBJECT (stream->pad, "offset < segment->time %" GST_TIME_FORMAT,
GST_TIME_ARGS (segment->time));
return FALSE;
}
/* segment lies beyond total indicated duration */
if (G_UNLIKELY (qtdemux->segment.duration != GST_CLOCK_TIME_NONE &&
segment->time > qtdemux->segment.duration)) {
GST_WARNING_OBJECT (stream->pad, "file duration %" GST_TIME_FORMAT
" < segment->time %" GST_TIME_FORMAT,
GST_TIME_ARGS (qtdemux->segment.duration),
GST_TIME_ARGS (segment->time));
return FALSE;
}
gst_qtdemux_stream_segment_get_boundaries (qtdemux, stream, offset,
&start, &stop, &time);
GST_DEBUG_OBJECT (stream->pad, "new segment %d from %" GST_TIME_FORMAT
" to %" GST_TIME_FORMAT ", time %" GST_TIME_FORMAT, seg_idx,
GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (time));
@ -4492,6 +4510,38 @@ gst_qtdemux_activate_segment (GstQTDemux * qtdemux, QtDemuxStream * stream,
gst_qtdemux_push_tags (qtdemux, stream);
}
if (_start)
*_start = start;
if (_stop)
*_stop = stop;
return TRUE;
}
/* activate the given segment number @seg_idx of @stream at time @offset.
* @offset is an absolute global position over all the segments.
*
* This will push out a NEWSEGMENT event with the right values and
* position the stream index to the first decodable sample before
* @offset.
*/
static gboolean
gst_qtdemux_activate_segment (GstQTDemux * qtdemux, QtDemuxStream * stream,
guint32 seg_idx, GstClockTime offset)
{
QtDemuxSegment *segment;
guint32 index, kf_index;
GstClockTime start = 0, stop = GST_CLOCK_TIME_NONE;
GST_LOG_OBJECT (stream->pad, "activate segment %d, offset %" GST_TIME_FORMAT,
seg_idx, GST_TIME_ARGS (offset));
if (!gst_qtdemux_stream_update_segment (qtdemux, stream, seg_idx, offset,
&start, &stop))
return FALSE;
segment = &stream->segments[stream->segment_index];
/* in the fragmented case, we pick a fragment that starts before our
* desired position and rely on downstream to wait for a keyframe
* (FIXME: doesn't seem to work so well with ismv and wmv, as no parser; the