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mpegdemux: handle upstream TIME segments

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This commit is contained in:
Mark Nauwelaerts 2012-10-12 15:44:03 +02:00
parent 69cfbcbd0b
commit a9c0609ae8
1 changed files with 28 additions and 8 deletions
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36
gst/mpegdemux/gstmpegdemux.c
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@ -882,9 +882,13 @@ gst_flups_demux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
const GstSegment *segment; const GstSegment *segment;
gst_event_parse_segment (event, &segment); gst_event_parse_segment (event, &segment);
gst_segment_copy_into (segment, &demux->sink_segment); gst_segment_copy_into (segment, &demux->sink_segment);
GST_INFO_OBJECT (demux, "received segment %" GST_SEGMENT_FORMAT, segment);
/* we need to emit a new segment */
gst_flups_demux_mark_discont (demux, TRUE, TRUE);
if (segment->format == GST_FORMAT_BYTES if (segment->format == GST_FORMAT_BYTES
&& demux->scr_rate_n != G_MAXUINT64 && demux->scr_rate_n != G_MAXUINT64
&& demux->scr_rate_d != G_MAXUINT64) { && demux->scr_rate_d != G_MAXUINT64) {
@ -894,15 +898,14 @@ gst_flups_demux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
demux->src_segment.start = BYTES_TO_GSTTIME (segment->start); demux->src_segment.start = BYTES_TO_GSTTIME (segment->start);
demux->src_segment.stop = BYTES_TO_GSTTIME (segment->stop); demux->src_segment.stop = BYTES_TO_GSTTIME (segment->stop);
demux->src_segment.time = BYTES_TO_GSTTIME (segment->time); demux->src_segment.time = BYTES_TO_GSTTIME (segment->time);
} else if (segment->format == GST_FORMAT_TIME) {
/* we expect our timeline (SCR, PTS) to match the one from upstream,
* if not, will adjust with offset later on */
gst_segment_copy_into (segment, &demux->src_segment);
/* accept upstream segment without adjusting */
demux->adjust_segment = FALSE;
} }
GST_INFO_OBJECT (demux, "received new segment: rate %g "
"format %d, start: %" G_GINT64_FORMAT ", stop: %" G_GINT64_FORMAT
", time: %" G_GINT64_FORMAT, segment->rate, segment->format,
segment->start, segment->stop, segment->time);
/* we need to emit a new segment */
gst_flups_demux_mark_discont (demux, TRUE, TRUE);
gst_event_unref (event); gst_event_unref (event);
break; break;
@ -1590,12 +1593,29 @@ gst_flups_demux_parse_pack_start (GstFluPSDemux * demux)
/* keep the first src in order to calculate delta time */ /* keep the first src in order to calculate delta time */
if (G_UNLIKELY (demux->first_scr == G_MAXUINT64)) { if (G_UNLIKELY (demux->first_scr == G_MAXUINT64)) {
gint64 diff;
demux->first_scr = scr; demux->first_scr = scr;
demux->first_scr_offset = demux->cur_scr_offset; demux->first_scr_offset = demux->cur_scr_offset;
demux->base_time = MPEGTIME_TO_GSTTIME (demux->first_scr); demux->base_time = MPEGTIME_TO_GSTTIME (demux->first_scr);
GST_DEBUG_OBJECT (demux, "determined base_time %" GST_TIME_FORMAT,
GST_TIME_ARGS (demux->base_time));
/* at begin consider the new_rate as the scr rate, bytes/clock ticks */ /* at begin consider the new_rate as the scr rate, bytes/clock ticks */
scr_rate_n = new_rate; scr_rate_n = new_rate;
scr_rate_d = CLOCK_FREQ; scr_rate_d = CLOCK_FREQ;
/* our SCR timeline might have offset wrt upstream timeline */
if (demux->sink_segment.format == GST_FORMAT_TIME) {
if (demux->sink_segment.start > demux->base_time)
diff = -(demux->sink_segment.start - demux->base_time);
else
diff = demux->base_time - demux->sink_segment.start;
if (diff > GST_SECOND) {
GST_DEBUG_OBJECT (demux, "diff of %" GST_TIME_FORMAT
" wrt upstream start %" GST_TIME_FORMAT "; adjusting base",
GST_TIME_ARGS (diff), GST_TIME_ARGS (demux->sink_segment.start));
demux->base_time += diff;
}
}
} else if (G_LIKELY (demux->first_scr_offset != demux->cur_scr_offset)) { } else if (G_LIKELY (demux->first_scr_offset != demux->cur_scr_offset)) {
/* estimate byte rate related to the SCR */ /* estimate byte rate related to the SCR */
scr_rate_n = demux->cur_scr_offset - demux->first_scr_offset; scr_rate_n = demux->cur_scr_offset - demux->first_scr_offset;