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videoaggregator: If getting a timeout before having caps, just advance our position

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This can happen if this is a live pipeline and no source produced any buffer
and sent no caps until an output buffer should've been produced according to the
latency.

This fix is similar in spirit to commit be7034d1 by Sebastian for audiomixer.
This commit is contained in:
Nirbheek Chauhan 2015-01-29 02:28:38 +05:30 committed by Sebastian Dröge
parent 38a06d0a33
commit 4527811b1f
1 changed files with 40 additions and 2 deletions
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42
gst-libs/gst/video/gstvideoaggregator.c
View file

@ -760,6 +760,13 @@ gst_videoaggregator_update_src_caps (GstVideoAggregator * vagg)
GST_VIDEO_AGGREGATOR_GET_CLASS (vagg)->negotiated_caps (vagg, caps);
}
gst_caps_unref (caps);
} else {
/* We couldn't decide the output video info because the sinkpads don't have
* all the caps yet, so we mark the pad as needing a reconfigure. This
* allows aggregate() to skip ahead a bit and try again later. */
GST_DEBUG_OBJECT (vagg, "Couldn't decide output video info");
gst_pad_mark_reconfigure (agg->srcpad);
ret = FALSE;
}
done:
@ -1261,8 +1268,39 @@ gst_videoaggregator_aggregate (GstAggregator * agg, gboolean timeout)
ret = gst_videoaggregator_update_src_caps (vagg);
if (!ret) {
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
return GST_FLOW_NOT_NEGOTIATED;
if (timeout && gst_pad_needs_reconfigure (agg->srcpad)) {
guint64 frame_duration;
gint fps_d, fps_n;
GST_DEBUG_OBJECT (vagg,
"Got timeout before receiving any caps, don't output anything");
if (agg->segment.position == -1) {
if (agg->segment.rate > 0.0)
agg->segment.position = agg->segment.start;
else
agg->segment.position = agg->segment.stop;
}
/* Advance position */
fps_d = GST_VIDEO_INFO_FPS_D (&vagg->info) ?
GST_VIDEO_INFO_FPS_D (&vagg->info) : 1;
fps_n = GST_VIDEO_INFO_FPS_N (&vagg->info) ?
GST_VIDEO_INFO_FPS_N (&vagg->info) : 25;
/* Default to 25/1 if no "best fps" is known */
frame_duration = gst_util_uint64_scale (GST_SECOND, fps_d, fps_n);
if (agg->segment.rate > 0.0)
agg->segment.position += frame_duration;
else if (agg->segment.position > frame_duration)
agg->segment.position -= frame_duration;
else
agg->segment.position = 0;
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
return GST_FLOW_OK;
} else {
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
return GST_FLOW_NOT_NEGOTIATED;
}
}
}