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videoaggregator: Catch errors, and allow sub-class to return NULL from get_output_buffer()

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A return value of GST_FLOW_OK with a NULL buffer from get_output_buffer()
means the sub-class doesn't want to produce an output buffer, so
skip it.

If gst_videoaggregator_do_aggregate() generates an error, make sure
to propagate it - don't just ignore and discard the error by
over-writing it with the gst_pad_push() result.
This commit is contained in:
Jan Schmidt 2015-05-04 18:17:21 +10:00
parent fba7c97135
commit 6dabd46a2d
1 changed files with 8 additions and 0 deletions
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8
gst-libs/gst/video/gstvideoaggregator.c
View file

@ -1198,6 +1198,10 @@ gst_videoaggregator_do_aggregate (GstVideoAggregator * vagg,
gst_flow_get_name (ret));
return ret;
}
if (*outbuf == NULL) {
/* sub-class doesn't want to generate output right now */
return GST_FLOW_OK;
}
GST_BUFFER_TIMESTAMP (*outbuf) = output_start_time;
GST_BUFFER_DURATION (*outbuf) = output_end_time - output_start_time;
@ -1369,6 +1373,8 @@ gst_videoaggregator_aggregate (GstAggregator * agg, gboolean timeout)
if (jitter <= 0) {
ret = gst_videoaggregator_do_aggregate (vagg, output_start_time,
output_end_time, &outbuf);
if (ret != GST_FLOW_OK)
goto done;
vagg->priv->qos_processed++;
} else {
GstMessage *msg;
@ -1405,6 +1411,8 @@ gst_videoaggregator_aggregate (GstAggregator * agg, gboolean timeout)
goto done_unlocked;
done:
if (outbuf)
gst_buffer_unref (outbuf);
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
done_unlocked: