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mpegdemux: clean up segment sending

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... to use the src_segment as a basis for the sent segment,
thereby properly conveying accumulated base_time etc.

Also ensure src_segment is only adjusted once, so that
all downstream segments are identical to avoid stream
misalignment.
This commit is contained in:
Mark Nauwelaerts 2012-10-11 15:27:12 +02:00
parent b8312df0a3
commit 44583eae90
2 changed files with 26 additions and 38 deletions
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63
gst/mpegdemux/gstmpegdemux.c
View file

@ -335,6 +335,7 @@ gst_flups_demux_reset (GstFluPSDemux * demux)
demux->next_pts = G_MAXUINT64; demux->next_pts = G_MAXUINT64;
demux->next_dts = G_MAXUINT64; demux->next_dts = G_MAXUINT64;
demux->need_no_more_pads = TRUE; demux->need_no_more_pads = TRUE;
demux->adjust_segment = TRUE;
gst_flups_demux_reset_psm (demux); gst_flups_demux_reset_psm (demux);
gst_segment_init (&demux->sink_segment, GST_FORMAT_UNDEFINED); gst_segment_init (&demux->sink_segment, GST_FORMAT_UNDEFINED);
gst_segment_init (&demux->src_segment, GST_FORMAT_TIME); gst_segment_init (&demux->src_segment, GST_FORMAT_TIME);
@ -507,9 +508,7 @@ gst_flups_demux_send_segment (GstFluPSDemux * demux, GstFluPSStream * stream,
{ {
/* discont */ /* discont */
if (G_UNLIKELY (stream->need_segment)) { if (G_UNLIKELY (stream->need_segment)) {
guint64 time, start, stop;
GstSegment segment; GstSegment segment;
GstEvent *newsegment;
GST_DEBUG ("PTS timestamp:%" GST_TIME_FORMAT " base_time %" GST_TIME_FORMAT GST_DEBUG ("PTS timestamp:%" GST_TIME_FORMAT " base_time %" GST_TIME_FORMAT
" src_segment.start:%" GST_TIME_FORMAT " .stop:%" GST_TIME_FORMAT, " src_segment.start:%" GST_TIME_FORMAT " .stop:%" GST_TIME_FORMAT,
@ -517,48 +516,35 @@ gst_flups_demux_send_segment (GstFluPSDemux * demux, GstFluPSStream * stream,
GST_TIME_ARGS (demux->src_segment.start), GST_TIME_ARGS (demux->src_segment.start),
GST_TIME_ARGS (demux->src_segment.stop)); GST_TIME_ARGS (demux->src_segment.stop));
if (GST_CLOCK_TIME_IS_VALID (demux->base_time) && /* adjust segment start if estimating a seek was off quite a bit,
GST_CLOCK_TIME_IS_VALID (demux->src_segment.start)) * make sure to do for all streams though to preserve a/v sync */
start = demux->base_time + demux->src_segment.start; /* FIXME such adjustment tends to be frowned upon */
else if (pts != GST_CLOCK_TIME_NONE && demux->adjust_segment) {
start = 0;
if (GST_CLOCK_TIME_IS_VALID (demux->src_segment.stop) &&
GST_CLOCK_TIME_IS_VALID (demux->base_time))
stop = demux->base_time + demux->src_segment.stop;
else
stop = -1;
if (pts != GST_CLOCK_TIME_NONE) {
if (demux->src_segment.rate > 0) { if (demux->src_segment.rate > 0) {
if (GST_CLOCK_DIFF (start, pts) > GST_SECOND) if (GST_CLOCK_DIFF (demux->src_segment.start, pts) > GST_SECOND)
start = pts; demux->src_segment.start = pts - demux->base_time;
} else { } else {
if (GST_CLOCK_DIFF (stop, pts) > GST_SECOND) if (GST_CLOCK_DIFF (demux->src_segment.stop, pts) > GST_SECOND)
stop = pts; demux->src_segment.stop = pts - demux->base_time;
} }
} }
if (GST_CLOCK_TIME_IS_VALID (demux->base_time) && start > demux->base_time) demux->adjust_segment = FALSE;
time = start - demux->base_time;
else
time = 0;
GST_INFO_OBJECT (demux, "sending new segment: rate %g applied_rate %g " /* we should be in sync with downstream, so start from our segment notion,
"start: %" GST_TIME_FORMAT ", stop: %" GST_TIME_FORMAT * which also includes proper base_time etc, tweak it a bit and send */
", time: %" GST_TIME_FORMAT " to pad %" GST_PTR_FORMAT, gst_segment_copy_into (&demux->src_segment, &segment);
demux->sink_segment.rate, demux->sink_segment.applied_rate, if (GST_CLOCK_TIME_IS_VALID (demux->base_time)) {
GST_TIME_ARGS (start), GST_TIME_ARGS (stop), if (GST_CLOCK_TIME_IS_VALID (segment.start))
GST_TIME_ARGS (time), stream->pad); segment.start += demux->base_time;
if (GST_CLOCK_TIME_IS_VALID (segment.stop))
segment.stop += demux->base_time;
segment.time = segment.start - demux->base_time;
}
gst_segment_init (&segment, GST_FORMAT_TIME); GST_INFO_OBJECT (demux, "sending segment event %" GST_SEGMENT_FORMAT
segment.rate = demux->sink_segment.rate; " to pad %" GST_PTR_FORMAT, &segment, stream->pad);
segment.applied_rate = demux->sink_segment.applied_rate;
segment.start = start;
segment.stop = stop;
segment.time = time;
newsegment = gst_event_new_segment (&segment);
gst_pad_push_event (stream->pad, newsegment); gst_pad_push_event (stream->pad, gst_event_new_segment (&segment));
stream->need_segment = FALSE; stream->need_segment = FALSE;
} }
@ -652,13 +638,14 @@ gst_flups_demux_mark_discont (GstFluPSDemux * demux, gboolean discont,
if (G_LIKELY (stream)) { if (G_LIKELY (stream)) {
stream->discont |= discont; stream->discont |= discont;
stream->need_segment |= need_segment; stream->need_segment |= need_segment;
demux->adjust_segment |= need_segment;
GST_DEBUG_OBJECT (demux, "marked stream as discont %d, need_segment %d", GST_DEBUG_OBJECT (demux, "marked stream as discont %d, need_segment %d",
stream->discont, stream->need_segment); stream->discont, stream->need_segment);
} }
} }
} }
static inline gboolean static gboolean
gst_flups_demux_send_event (GstFluPSDemux * demux, GstEvent * event) gst_flups_demux_send_event (GstFluPSDemux * demux, GstEvent * event)
{ {
gint i, count = demux->found_count; gint i, count = demux->found_count;

1
gst/mpegdemux/gstmpegdemux.h
View file

@ -132,6 +132,7 @@ struct _GstFluPSDemux
GstSegment sink_segment; GstSegment sink_segment;
GstSegment src_segment; GstSegment src_segment;
gboolean adjust_segment;
/* stream output */ /* stream output */
GstFluPSStream *current_stream; GstFluPSStream *current_stream;